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Trench Group
Variable Shunt Reactors

Variable Shunt Reactors

Product catalog summary

Introduction
The document discusses the role of Variable Shunt Reactors (VSRs) in reactive power compensation within electrical networks. Reactive power flow results from varying consumption and generation, causing voltage drops and additional losses. To maintain system stability, compensation methods like fixed shunt capacitors or reactors are used, but they lack flexibility. VSRs offer a more adaptable solution, especially in networks with unpredictable power generation or rapidly changing loads.

Application
VSRs are ideal for networks with distributed generation or long transmission lines, where they help maintain voltage stability and reduce line losses. They are particularly useful in systems where fast dynamic response is not critical, providing cost-effective reactive power compensation and voltage control.

Equipment Description
Trench, a leader in power reactor design, offers VSRs with adjustable inductance achieved through moveable plunger cores. This design allows for a wide range of compensation power adjustments, similar to transformer tap changers, and is suitable for continuous operation.

Design Features
The VSRs are three-phase, iron-cored, oil-immersed coils with variable air gaps, adjustable via a motor drive. They include features like oil-filled tanks, porcelain bushings, and various monitoring devices. The design ensures loss optimization and extended power regulation.

Technical Characteristics
VSRs support system voltages up to 123 kV and rated power up to 50 Mvar, with a power regulation range of 20-100%. They are designed for 50 Hz systems, with adjustments taking less than 300 seconds.

Automatic Controller
An automatic control device, based on the EFC 20 controller, allows for remote and automated operation of VSRs. It supports data logging and recording, making it suitable for unmanned stations.

Contact Information
The document provides contact details for Trench offices worldwide, including locations in Austria, Canada, France, Germany, Switzerland, the UK, Brazil, and China.

Catalog excerpts

Variable Shunt Reactors Reactive Power Compensation

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The flow of reactive power in electrical networks is a conse- quence of varying reactive power changing, the reactive current drawn from the system also changes. When reactive current flows, a voltage drop occurs and the system voltage will decrease with respect to the no-load value. Furthermore, the flow of reactive current will cause additional losses in the On systems, where the varying reactive power requirements and/or generation cannot be tolerated, it is common practice pensation means in order to power system within defined In networks, where consumption predictable and stable, fixed...

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If such a very fast and dynamic continuously Variable Shunt required function of reactive power compensation over a wide range of service condi- tions at minimum investment • maintain steady-state voltage limit conditions power flow within predefined limits power factor As part of the overall reactive compensation scheme, a conti- nuously VSR may provide reac- tive power compensation and smooth steady-state voltage control in response to the daily load cycle and possible chan- thermore, the flexibility of VSRs offers the ability to adapt to sy- stem topology changes or new Typical network conditions...

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With more than 3 decades of successful field experience, Trench is the recognized world leader in designing and manu- facturing of power reactors for all utility and industrial applica- tions. Our unique design ap- proach for VSRs is the appro- priate answer for continuous adjustable reactive power com- pensation within minutes/ hour time scale. it's power output via variation magnetic circuit. This is reali- plunger cores. Depending on the position of the twin cores, side the winding is provided. The magnetic circuit consists essentially of cylindrical shaped twin plunger cores and several C-shaped...

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Design Features oil-immersed coil with • continuously adjustable, via a motor drive unit in on-load condition • common oil-filled steel tank with detachable conservator • with flanged-on radiators • mobile underbase with bi- directional rollers or skid base tage level and/or creepage distance requirements - optional: touch-free design via plug-in cable termination system • motor drive unit, 230/400 V buttons for coil adjustment, with hand - crank for emergency operation anti-condensation heater mechanical position indicator remote indication • current transformers, • contact thermometer with...

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Technical Characteristics Fig. 4 Variable Shunt Reactor (VSR), 47 kV - 7 Mvar

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Automatic Controller In order to allow for automatic control of the VSR, Trench is also able to provide an automatic control device (based on our earth fault compensation con- within the given limits of reac- tive power demand - this is par- ticular convenient for unmanned or fully automated stations. It further allows remote opera- gital inputs or via a substation automation and control system. The automatic controller further- more provides data logging and comprehensive recording func-

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□ Trench Austria GmbH Paschinger StraBe 49, Postfach 36 email [email protected] Instrument Transformer Division 390 Midwest Road, Scarborough email [email protected] Coil Product Division 71 Maybrook Drive, Scarborough email [email protected] email [email protected] □ Trench Germany GmbH email [email protected] email [email protected] Tyne & Wear email [email protected] Àriderungen vorbehalter □ Trench Brasil LTDA Contagem, Minas Gerais/Brasil email [email protected] □ Trench China Limited 3658 Jiang Cheng Road email [email protected]

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Variable Shunt Reactors

Variable Shunt Reactors

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