Monitoring systems of power transformer equipment

Monitoring Systems (MS) of parameters of power transformer equipment, voltage rating 110-1250kV, are designed for continuous measuring and recording of critical parameters of transformers, autotype transformers and reactor coils while in operation. The present-day MS systems make it possible to detect any malfunction in the operation of power transformers and other equipment of substations in early stages of their occurrence, and, therefore, to take a decision on their elimination before any contingency. It does not only prevent any significant damage, but it cuts shutdown time, reduces expenditures for repairs and extends the service life of transformers.

BPA LLC is a representative and service partner of Energoavtomatizatsiya LLC (Zaporozhye) - a manufacturer of MS systems (Independent Monitoring Systems - IMS) of SAFE-Т type. BPA is engaged in promotion of SAFE-Т systems within the Russian Federation, it performs the licensed production, renders the services for installation and start up, warranty and after-sale support of SAFE-Т systems, as well as in-process control devices of gas and moisture contents in insulating oil of Calisto type made by Morgan Schaffer Inc, Canada.

The IMS functional capabilities include:

- continuous monitoring of power transformer equipment status in on-line mode;

- timely informing of operating staff for the purpose of control and regulation of equipment operation modes and timely taking of necessary actions at any pre-fault conditions, as well as provision of information for analysis of emergency conditions;

- analysis of power transformer equipment based on archived parameters and events accumulated for the whole period of operation.

The SAFE-Т systems and Calisto instruments are certified in FGC UES.

    

Monitored SAFE-Т parameters:

SAFE-Т structure



Scheme legend:

AT1, AT2 – autotype transformers,

UShR – controlled shunt reactor,

Prib_Vv – input insulation monitor,

Calisto – monitor of oil dissolved Н2 and moisture,

BM – monitoring hardware,

ShS – system cabinet,

BKS – equipment network concentration module,

ARM – operator’s automated workstation,

UPSU – uninterruptible power supply unit

Competitive advantages of SAFE-T IMS are as follows:

  • database of transformer equipment parameters is formed and stored on solid-state disk in monitoring hardware (BM) that ensures safe storage of initial information immediately after its reading in the chain: Monitored facility (primary elements) → BM → Ethernet → BKS → Ethernet → ARM;
  • BM can operate self-supporting for a long time period (not less than 30 years) at ARM switched off. Moreover, all functions for data collection, processing and accumulation from the monitored facility will be performed;
  • ARM databases for the period of switching off are restored from BM databases automatically;
  • the operating system software and the operator’s interface are in Russian;
  • the system provides a capability of remote monitoring and review with the running on-line data and operation with the database by means of standard Web-browser through the integrated Web-server;
  • the system provides a capability of integration into APCS of the substation;
  • an electronic key is used to prevent any unauthorized access to the system;
  • systems are produced with high reliable components of the leading world-wide manufacturers

One of the key components of any monitoring system is gas- and moisture content detector. BPA recommendations – Calisto instruments, which are an embodiment of 15-year experience of Morgan Schaffer Inc (Canada) operation in the field of production of continuous monitoring instruments and portable gas analyzers and up-to-date technology of measurement of dissolved hydrogen, carbon oxide and water.

The detection limit of Calisto instruments allows obtaining so much accurate results, which excel similar equipment in this industry sector.



Examples of implemented projects:

Supply of SAFE-T monitoring systems

Continuous monitoring system of SAFE-T type gained widespread currency in Russia, Kazakhstan and Ukraine. Full reference of their implementations is represented on the website of the developer– Energoavtomatizatsiya LLC (city of Zaporozhye).

The scheme of a standard SAFE-T system has three levels:

  • Level I includes all actuating mechanisms and primary detectors, which provide measuring and recording of the parameters characterizing the status of the facility. The primary detector and measuring systems should have standard signal output and interface (RS232, RS485, Ethernet, 0(4)-20 mA, 0-10V, Pt100). The list of controlling actions, measured and monitored parameters, as well as primary detectors and measuring systems for a specific facility to be monitored are determined in the course of preparation of Requirement Specifications and are fixed in the agreement.
  • Level II is intended for collection of the information from the primary detectors and it is composed of monitoring hardware (BM), which provides implementation of local controlling algorithms and data exchange with Level III (operator’s automated workstation), as well as accumulation and storage of the data received from the primary detectors on a solid-state disk. The complete hardware package of Level II is mounted in a special cabinet located nearby the monitoring item.
  • Level III is composed of a system cabinet (ShS) with a network concentration module (BKS) and the operator’s automated workstation (ARM). BKS provides data communication of the monitoring hardware with ARM. ARM provides visualization of monitoring and estimating parameters of the transformer equipment, displaying of signals of the emergency and warning alarm system. ARM provides accumulation, storage, and processing of databases of the transformer equipment technical condition.

Functional capabilities of the system:

  • monitoring of electrical data (currents, voltages, active and reactive powers, cosφ) of HV, MV, LV sides;
  • monitoring of HV, MV input insulation with record of absolute values of dielectric loss tangent, isolation capacitance and their changes;
  • monitoring of characteristics and locations of partial discharges in power equipment units (the instrument is outside the scope of supply of continuous monitoring system);
  • monitoring of gas- and moisture content in insulating oil (the instrument is outside the scope of supply of continuous monitoring system);
  • monitoring of winding temperature;
  • monitoring of uppermost oil layer temperature;
  • monitoring of bottom oil layer temperature;
  • monitoring of operational lifetime of on-load changing device, in particular, operating period on the current (each) branch, total number of changes, duration of changes, fault recording;
  • monitoring of operational lifetime of cooling system;
  • monitoring of constant and emergency overloads;
  • monitoring of expired service life and forecast of service life of transformer equipment on the basis of on-line real time simulation models with provision of recommendations on optimization of operation conditions;
  • monitoring of tripping actuation;
  • displaying of on-line and historical information in the monitor of the operator’s automated workstation (ARM) making possible a self-diagnosis of the monitoring power equipment of the substation in one operator’s ARM;
  • warning and emergency signal forming for all monitored parameters;
  • recording and storage of the received information during the whole period of the equipment operation with automated backing up of the technical status data of the equipment during its operation; the database of the parameters measured is formed and stored on solid-state disk in monitoring hardware (BM) controller with persistence of the data read directly from the primary detectors within not less than 30 years (according to the Instruction no. 538р);
  • IMS provides an automated collection, processing and accumulation of the measurements;
  • the faults in the monitoring system cause no failure of the primary detectors and measuring systems (both, analog and relay), no loss of data from the operating units, and no formation of false signals;
  • unauthorized interruption of the primary power from IMS will cause no loss of the accumulated data;
  • self-contained operation of IMS within 60 min. in case of interruption of the uninterruptible power supply (according to the Instruction no.538р);
  • IMS self-diagnosis;
  • IMS integration into APCS (via ОРС protocol or IEC 60870-5-104);
  • remote browse of on-line and historical data through the integrated WEB-server.

The list of mathematical models and expert analysis provided by the standard SAFE-T system:

ModelDescription
Temporary voltage overloading on HV sideAnalysis and recoding of compliance with the requirements of GOST 1516.3-96.
Capacity of monitored equipmentContinuous estimation of active and reactive power, cosj on HV, MV, LV sides
Temperature of the hottest winding point Continuous estimation of the temperature of the hottest winding point based on the data of the temperature of uppermost layers of oil (measured by detector) and load in accordance with IEC 60076-7.
Moisture content in insulation. Vapor bubble temperature Conversion of the data on the relative moisture content into absolute one. Estimation of solid insulation moisture content in hot spots. Determination of air to boil, margin in air to boil.
Insulation deteriorationEstimation of insulation deterioration on the basis of the temperature of the hottest winding point and estimated moisture content in solid insulation. Forecast for deterioration and general wear and tear. GOST 14209-97 (IEC 354-91), IEC 60076-7.
Cooling system condition and efficiency Estimation of the temperature of the uppermost layers of oil in accordance with IEC 60076-7 or GOST 14209-97 and its comparison with actual one. Continuous monitoring of operation mode of the cooling unit (cooling levels).
On-load changing device conditionCalculation of oil temperature difference in main tank and on-load changing device contactor tank. Determination of mechanical and electrical contact wear.
Evaluation of basic insulation condition of HV, MV inputsCalculation of basic insulation parameters of HV inputs (dielectric loss tangent, capacitance and their variation) on the basis of data from external monitor.
Transformer load capacityCalculation of load capacity of the transformer as per GOST 14209-97 (IEC 354-91) or IEC 60076-7. Permissible values and time of overloading without loss of service life.
Partial charge characteristics Determination of characteristics of charge activity of partial charges in AT on the basis of data from external monitor.
Comprehensive assessment of equipment conditions at the current operationComprehensive assessment of the power equipment conditions at the current operation in accordance with the Order of OJSC “FGC UES” no. 538р f 02.08.2011 with due consideration of the requirements of RD 34.45- 51.300-97.

Engineering maintenance and restoration of monitoring systems of SAFE-T type (Energoavtomatizatsiya), T-Monitor (АBB), SUMTO (ASU-VEI), installed at the FGC UES facilities

BPA has performed a set of works on engineering maintenance and restoration of monitoring systems of various manufacturers (Energoavtomatizatsiya, ASU-VEI, ABB), installed at the FGC UES substations:

The Center Main Power Networks:

- Moscow Enterprises of the Main Power Networks: MS of SAFE-T type at Beskudnikovo Substation, Chagino Substation, Zapadnaya Substation

- Valday Enterprises of the Main Power Networks: MS of T-Monitor type at Kalininskaya Substation, MS of SAFE-T type at Bologoye Substation;

- Verkhne-Donskoye Enterprises of the Main Power Networks: MS of SUMTO type at Severnaya Substation, MS of SAFE-T type at Lipetskaya Substation;

- Volgo-Okskoye Enterprises of the Main Power Networks: MS of T-Monitor type at Zvezda Substation.

The Main Power Networks of the Northwest:

- Saint-Petersburg Enterprises of the Main Power Networks: MS of SAFE-T type at Leningradskaya Substation, MS of Hydran M2 type at Rzhevskaya Substation

- Novgorod Enterprises of the Main Power Networks: MS of SUMTO type at Novgorodskaya Substation, MS of SUMTO type at Yugo-Zapadnaya Substation, MS of SAFE-T type at Chudovo Substation, MS of SAFE-T type at Okulovskaya Substation,

- Vyborg Enterprises of the Main Power Networks: MS of SAFE-T type at Kamennogorskaya Substation

- Bryansk Enterprises of the Main Power Networks: MS of SAFE-T type at Talashkino Substation

- Karelia Enterprises of the Main Power Networks: MS of T-Monitor type at Knyazhegubskaya Substation, MS of Calisto type at Loukhi Substation

The Main Power Networks of Siberia:

- Omsk Enterprises of the Main Power Networks: Tavricheskaya Substation

The Main Power Networks of Ural:

- Yuzhno-Uralsk Enterprises of the Main Power Networks: MS of Calisto type at Novometallurgicheskaya Substation

The works for restoration and maintenance of MS of the power equipment were performed in two stages.

Stage 1: Technical inspection of MSs, including:

­ Evaluation of current conditions of the operating MSs;

­ Preparation of itemized list of defects (bill of works) including the type of works to be performed, actual volumes and coefficients on the work performance conditions;

­ Drawing up of work schedule for restoration and engineering maintenance of MSs;

­ Agreement of the list of defects and work schedule with the Customer;

­ Drawing up of local estimates for restoration and engineering maintenance for each MS;

Stage 2: Restoration and engineering maintenance of MSs including:

­ supply of equipment, materials and spare parts required to perform the works. Cost of the equipment, materials and spare parts should be determined in Stage 1 and fixed in the local estimates;

­ restoration and engineering maintenance of the MSs installed on the power equipment at quantity according to para.5. and according to the results of MS inspection;

­ drawing up of documents based on the results of the performed works: acceptance certificates, test reports.

Control and measuring instruments and field equipment

Section Control Instrumentation
Name of job Engineering of Field Equipment
Description

Department of Control Instrumentation and Field Equipment fulfils the tasks of engineering, selection and supply of control instrumentation, shutoff and control valves, auxiliary electrical apparatus and base constructions.

Employees of the Department of Control Instrumentation are high-qualified specialists having experience in implementation of projects of field equipment intended for wide range of industrial sectors. Principal directions of the activity include implementation of projects and supply of equipment for Oil and Gas Industry of Russia and CIS countries.

BPA LLC is an official distributor of the leading manufacturers of control instrumentation, shutoff and control valves:

 

Invensys, Krohne, Emerson, Endress&Hauser, Honeywell, Siemens, Yokogawa, Masonelian, Drager, Daily Telemetrics, Wika, Jumo, Тесей, Tescom, DK-lock, Seba Hydrometrie, Flowserve, Rotork

Automated control system, Emergency protection and Fire-prevention automatics

Development and implementation of DCS, ESD and fire automatics control systems

The proposed technical solutions are built on the commercially available hardware and software of both, domestic and foreign manufacturers, having passed the tests and certified by the appropriate documents (certificates, permits for use in Russia):

  • Certificate of Conformity issued by GosStandart of Russia;
  • Pattern Approval Certificate of Measuring Instruments issued by GosStandart of Russia;
  • Certificate of Explosion Proofness of Electric Installation for the equipment installed in explosive hazardous zones;
  • Permit of Rostekhnadzor (Gosgortekhnadzor) for use in the Russian Federation.

1. Engineering of Control Systems

  • development of technical and commercial proposals for engineering of APCS systems;
  • development of feasibility studies for APCS system implementation;
  • development of engineering designs of APCS systems;
  • development of engineering and operational documentation for APCS systems.

A technical and commercial proposal for APCS system developed by the Company’s specialists includes:

  • detail description of proposed technical solutions;
  • specification of equipment;
  • calculation of cost and duration of work stages;
  • structural diagram of the proposed APCS system.

Any technical and commercial proposal is prepared after provision of the basic data by the Customer.

At the stage of design, the list of the developed documents and their completeness are determined in accordance with GOST 34.201-89 “Types, Sets and Indication of Documents for Automated Systems Design”.

Approximate set of documents of a standard Technical working design.

Section "General Systemic Documentation"

  • List of main contractors.
  • Quantity sheet of engineering design.
  • Explanatory note.
  • Scheme of functional structure.

Section "Hardware"

  • Description of hardware components set.
  • Explanatory note.
  • Quantity sheet of equipment.
  • Structure scheme of hardware components set.
  • Connections wiring diagram.
  • External connection diagram.
  • Drawing of hardware installation.
  • Certificate of Conformity of hardware components.
  • Pattern Approval Certificate of Measuring Instruments.
  • Permit of Gosgortekhnadzor for use in the Russian Federation.

Section "Software and Information Support"

  • Description of software.
  • Explanatory note.
  • Quantity sheet of software.
  • List of input signals and data.
  • List of output signals.
  • List of output documents.

Approximate content of the Operational Documentation of the project:

  • List of Operational Documentation.
  • Program and methods for trial tests.
  • Program and methods for acceptance tests.
  • Passport of the system.
  • System logbook.
  • User manual.
  • System engineer manual.
  • Operational manual for hardware components set.

Development of engineering documentation is made on the basis of the following regulatory documents:

  • GOST 21.101-97 "Main Requirements for Design and Working Documents";
  • SNiP 11-01-95 "Instructions on the Procedure of Development, Coordination, Approval and Composition of Design Documentation of Enterprises, Buildings and Structures”;
  • GOST 34.003-90 "Information Technology. Set of Standards for Automated Systems. Automated Systems. Terms and Definitions";
  • RD 50-34.698.90 "Methodology Instructions. Information Technology. Set of Standards for Automated Systems. Requirements to Documents Content";
  • EIC "Rules for Installing Electrical Facilities. Sixth Edition, Moscow, 1998";
  • GOST 12.1.030-81.OSSS "Electric Safety. Protective Conductive Earth, Neutralling”;
  • GOST R 50571.15-97 "Electrical Installations of Buildings. Selection and Erection of Electrical Equipment ".

2. Development of APCS Application Software.

Specialists of the Company develop each specific project on the basis of the following basic principles:

  • Hardware and software used are standard-based and manufactured by the leading manufacturers, steadily operating in the market, having representative offices in Russia and ensuring high quality support to purchasers of their products.
  • Openness of technical solutions making it possible to use integrally the hardware and software of different manufacturers.
  • Preparation of detail engineering documentation, training of the enterprise’s staff, if necessary, to provide further opportunities for the system development by the customer’s specialists efforts.
  • Effective interaction with the APCS system existing at the enterprise. Moreover, if the available APCS is developed on the basis of standard open approaches, it is possible to provide its maximum close integration with the new information system – to the extent of retransmission of control commands from the upper level of the system to the level of sensors.
  • Capability of quickest possible implementation of APCS systems, particularly, due to the fact that technical solutions of the system are modular and strictly structured.

Automated Metering ASCAPC, ASEPTRK, AMIS EPFA

Automated Metering Systems (Automated System for Commercial Accounting of Power Consumption (ASCAPC)/Automated System of Electric Power Technical Record-Keeping (ASEPTRK)/Automated Measuring and Information System for Electric Power Fiscal Accounting (AMIS EPFA))

Automated systems of commercial and technical accounting of electric energy and energy resources (ASCAPC/ASEPTRK/AMIS EPFA) are becoming an obligatory condition of effective operation of electric power systems and plant facilities at all stages, from production to consumption.

BPA provides a wide range of services on creation of turn-key automated metering systems:

- survey of facilities, proposal of effective technical solutions,

- designing,

- completing with components and supply of equipment, computing machinery and software,

- construction and installation works, commissioning and startup works on installation of electric energy meters and other energy resources meters,

- implementation of automated metering systems of electric energy (AMIS EPFA/ASEPTRK) and energy resources on the basis of “Energoserver” ASCAPC software package,

- works on certification of systems as measuring instruments for compliance with the requirements of the wholesale market.

    

The key product of BPA in this field of activity is “Energoserver” ASCAPC software package designed for creation of advanced automated accounting systems of electric energy and energy resources of different classes and sizes.

Core capabilities:

- scanning of various types of digital metering units;

- support of a wide range of wire and wireless communication channels;

- time synchronization in metering units;

- convenient and clear configuration tool for the data collection system;

- on-line monitoring of metering units status;

- flexible system of scanning time-table;

- balance consolidation, calculation and monitoring of permissible imbalance;

- preparation of data exchange patterns as per standards of the wholesale market of electric energy;

- remote switch off of the load;

- data exchange with adjoining systems via OPC protocol;

- flexible connection mechanism of user’s reports;

- various databases support - Oracle, MSSQL, PostgreSQL.

“Energoserver” ASCAPC Package supports the following types of metering instruments:

Electricity meters:

- Ryazan State Instrument-Making Enterprise (SET and GAMMA);

- Nizhny Novgorod Plant named after M.V. Frunze (SEB-1ТМ.02, SEB-2А, PSCh-3ТА.07, PSCh-4ТМ.05, SET-4ТМ.03);

- Energomera Concern (СЕ102, CE6850М, СЕ301);

- Incotex Scientific and Production Company (Mercury 203.2Т, 233АРТ etc.);

- Elster Metronica (А1600, А1800);

- Matritsa (NP515, NP 545 etc.).

Measurers and flow meters:

- SovTIGaz (Superflow);

- Logika Scientific and Production Firm (SPT, SPG);

- Globus (IRGA);

- Vympel Scientific and Production Firm (Hyperflow);

- Tekon Group of Companies (Tekon);

- Teplocom-Service М (VKT-7);

- Vzlyot (VZLYOT VRS);

- Intelpribor (MKTS).

Examples of implemented projects:

ASEPTRK for Karelski Okatysh OJSC

There was developed and implemented the system of automation of monitoring and metering process of vapour, compressed air, and naphtha residue and grid water.

ASCAPC for Stoilenski GOK OJSC

There was developed and implemented the complex system of metering of energy resources of the enterprise that included more than 60 measurement instruments of different manufacturers;

Modernization of APCS for Company “Polyarnoye Siyanie” LLC

There was developed and implemented the system of automated metering of the associated gas;

Modernization of AMIS EPFA for Municipal Unitary Enterprise “Voronezh Gorelectroset”

There was implemented a large-scale project for automation of electric energy metering of Voronezh city consumers, including scanning of more than 1300 meters via GSM and GPRS channels.

The system of DC

Operating DC Voltage Systems (ODVS)

Modern system of electric power supply of power engineering facilities and industrial enterprises can not be developed without operating DC voltage systems (ODVS).

Prime area of ODVS application is uninterruptible (autonomous operation during not less than 30 minutes) electric power supply of medium- and high-power facilities in power production (110-750kV substations), oil and gas sectors, industry, communications and telecommunications facilities.

An urgent need to modernize and refit the electric energy facilities, as well as to commission new capacities requires reliable systems of uninterruptible power supply that meet the present-day operating requirements. Main partner of BPA in ODVS field is a world-wide leader, GUTOR company, a member of Schneider-Electric Group. The offered ODVS are certified in FGC UES and the Inter-Regional High-Voltage Grid Company, as well as they have GOST R certificates.

    

Standard components of ODVS offered by BPA include:

- rectifier chargers with capability to install ballasting arrangement at output,

- accumulator batteries (AB) with AB safety block,

- direct current board (DCB),

- standby lighting block (SLB),

- control current distribution cabinet (CCDC),

- insulation monitoring device of poles in network relative to ground,

- system of automated search of damaged insulation of poles in network relative to ground,

- detector of emergency processes and events (ODVS) (optional),

- monitoring and remote control device, and the means of giving signal of summarized fault in APCS,

- inverter installation with network bypass for power supply from ODVS of ac power consumers of special importance (optional).

Substation auxiliaries

The systems of substation auxiliaries ensure operation of substations providing internal consumers of substations with operating direct and alternating currents. Any breakdown (loss) of auxiliary systems causes shutdown of the whole substation, as well as serious problems during its subsequent putting into operation. So, at development of the systems of substation auxiliaries, one should be governed by selection of reliable and high-quality electrical equipment.

The solutions proposed by BPA for the systems of substation auxiliaries include:

- auxiliary power transformers,

- independent power supply source (as a rule, it is a diesel generator unit),

- medium-voltage switchgear,

- auxiliaries board (two or three inputs from ACB),

- operating DC voltage system:

  • full-rate ODVS including rectifier chargers, accumulator batteries and dc boards,
  • or complex of ODVS and auxiliary services cabinets for small substations

- switch gear cabinets and operating current panels (control current distribution cabinets, DC panels)

- automated system for integration of auxiliaries into APCS of substations.

    

Any offered equipment is certified in accordance with the requirements of the Customs Union, meets the requirements of GOST R, as well as it is certified in FGC UES and in the Inter-Regional High-Voltage Grid Company.

BPA renders full range of services for substation auxiliaries, namely:

- qualified selection of equipment, proposal of effective engineering solutions,

- development of requirement specifications and detail designs,

- manufacture of certified auxiliaries boards, DCB, auxiliary services cabinets, control current distribution cabinets, DC panels and complex ODVS,

- completing with components and supply of auxiliaries equipment,

- installation and construction works, erection supervision, commissioning and start-up works,

- retrofit and modernization of out-of-date equipment,

- after-sale support.

Uninterrupted power supply system

Industrial uninterruptible power supply and uninterruptible power supply units (UPS and UPSU)

Industrial uninterruptible power supply and uninterruptible power supply units (UPS and UPSU) are designed for power supply of three-phase and single phase essential service requiring high-quality power voltage and placing high requirements to the electric power supply stability.

Main partner of BPA in industrial-grade UPS is the world-wide leader in the field of uninterruptible power supply systems – GUTOR company, a member of Schneider-Electric Group. GUTOR is engaged, first of all, in design and development of its own technologies for high-efficiency power protection. The industrial-grade interruptible power supply units produced by GUTOR meet the requirements of such industries as oil and gas, petrochemical and chemical industries and production and transmission of electrical energy.

UPS of GUTOR grade are designed for output power of 5 to 220 kVA, supported by all commonly used input and output voltages and frequencies. At the Customer’s request, manufacturing of any customized UPS of higher capacity is possible. To improve reliability and efficiency, UPS modules are connected in parallel (2 to 9 units). A wide range of additional options expands the functionality of industrial grade UPS according to the variety of the Customer’s demands.

The GUTOR technology satisfies basic requirements of essential service of uninterruptible electric power supply:

- performance flexibility, maximum safety and reliability of systems;

- double conversion;

- parallel redundancy;

- active load division;

- modular design;

- accumulators of closed and hermetically sealed types completed with genuine parts of HAWKER GmbH (Germany).

    

The result of BPA’s work is tern-key supply of up-to-date complex systems of uninterruptible power supply, own monitoring and control systems that are linked with general APCS system of the enterprise.

Frequency converters and soft starters

Frequency converters (soft starters) or variable speed drives (VSD) are used for automation of installations with electric motors, motor speed control, energy-saving, and help to reduce operating costs and deterioration of operating mechanisms.

Soft starters make it possible to have а smooth (reduced-current) start and deceleration of electric motors.

The greatest economic effect is achieved due to use of frequency converters for pumps and fans in case of relatively large extent of motor speed control. Use of frequency converters in the systems of ventilation, conditioning and water supply have actually become a standard.

Today, the market offers a variety of modifications of frequency converters and soft starters of various manufacturers. BPA relies on high quality drives produced by the world-wide leaders of this direction:

- Rockwell Automation (Allen-Bradley),

- ABB, Siemens,

- Danfoss,

- Schneider-Electric.

    

Supply of converters made by other manufacturers is possible at the Customer’s request.

BPA offers full range of services for implementation of frequency converters and soft starters for voltage rating from 0.4kV to 10kV:

- integrated survey inspection of electrical installations,

- development and justification of technical solutions,

- development of requirement specifications,

- designing,

- expert examinations of projects,

- justification of projects and electrical installation in the supervision bodies

- manufacture of certified cabinets with frequency converters and soft starters (low-voltage package modules of MCC type),

- delivery of electrical equipment to any destination point within the country and abroad,

- construction and installation works, erection supervision, commissioning and start-up works,

- advisory on the issues of frequency converters and soft starters,

- after-sale support.

Power equipment for electrical energy distribution

With the growth of electrical energy consumption, and in the context of strengthening of the requirements to the quality and reliability of electric energy distributions systems, there is a critical need for implementation of up-to-date substation equipment (transformers, package substations, distribution gears, switching devices, metering units). Modernization of existing substations makes it possible to ensure sustainable electric power supply, to increase the reserve power for further extension of consumers.

BPA acts as an integrator of package solutions for implementation of advanced distribution electrical equipment produced by the leaders of this direction:

- ABB,

- Siemens,

- Eaton,

- Schneider-Electric,

as well as produced by domestic manufacturers.

    

BPA offers full range of services for implementation of 0.4kV to 220kV electrical power equipment (power and measuring transformers, power-factor correction units, distribution gears, package/block-modular/concrete transforming substations, electrical supply block-boxes with low-voltage package modules etc.):

- integrated survey inspection of electrical installations,

- development and justification of technical solutions,

- development of requirement specifications,

- designing,

- expert examinations of projects, justification of projects and electrical installations in the supervision bodies

- manufacture of certified low-voltage package module cabinets,

- completing with components and supply of electrical equipment and materials,

- integration of power electrical equipment into APCS of substations and enterprises

- construction and installation works, erection supervision, commissioning and start-up works,

- electrical installation tests with reporting according to the forms established by Rostekhnadzor,

- training of operating and maintenance personnel in operation of new equipment,

- retrofitting of electrical equipment,

- after-sale support.

Monitoring systems of power transformer equipment

Monitoring Systems (MS) of parameters of power transformer equipment, voltage rating 110-1250kV, are designed for continuous measuring and recording of critical parameters of transformers, autotype transformers and reactor coils while in operation. The present-day MS systems make it possible to detect any malfunction in the operation of power transformers and other equipment of substations in early stages of their occurrence, and, therefore, to take a decision on their elimination before any contingency. It does not only prevent any significant damage, but it cuts shutdown time, reduces expenditures for repairs and extends the service life of transformers.

BPA LLC is a representative and service partner of Energoavtomatizatsiya LLC (Zaporozhye) - a manufacturer of MS systems (Independent Monitoring Systems - IMS) of SAFE-Т type. BPA is engaged in promotion of SAFE-Т systems within the Russian Federation, it performs the licensed production, renders the services for installation and start up, warranty and after-sale support of SAFE-Т systems, as well as in-process control devices of gas and moisture contents in insulating oil of Calisto type made by Morgan Schaffer Inc, Canada.

The IMS functional capabilities include:

- continuous monitoring of power transformer equipment status in on-line mode;

- timely informing of operating staff for the purpose of control and regulation of equipment operation modes and timely taking of necessary actions at any pre-fault conditions, as well as provision of information for analysis of emergency conditions;

- analysis of power transformer equipment based on archived parameters and events accumulated for the whole period of operation.

The SAFE-Т systems and Calisto instruments are certified in FGC UES.