PCS-9580 static var compensator (SVC) with thyristor control
The PCS-9580 is a static var compensator (SVC) for high- and extra-high-voltage networks, with references up to ±360 Mvar at 750/66 kV. It quickly regulates reactive power, maintains voltage and power factor, and increases transfer capacity and stability. It is installed at trunk substations, HVDC converter stations, industrial plants and wind farms.
- Schemes
- TCR, TSR, TSC, BSC/FC (thyristor-reactor, thyristor-capacitor, fixed filters)
- Reference installation
- ±360 Mvar, 750/66 kV, TCR+FC scheme (Shazhou substation)
- Reference installation 2
- 100 Mvar, 110/35 kV, TCR+FC
- Composition
- step-down transformer, MV switchgear, air-core reactors, thyristor valves, capacitor banks/filters, cooling system, control and protection system
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The SVC works as a dynamic source of reactive power. When the network lacks capacitive power, the compensator supplies it, and it absorbs excess inductive power itself. A typical installation has one or several groups of fixed or switched capacitors and reactors, and at least one of them is thyristor-controlled. The schemes are built from standard elements: the thyristor-controlled reactor TCR, the thyristor-switched reactor TSR and capacitor TSC, as well as capacitors and filters switched by circuit breakers (BSC/FC).
The PCS-9580 includes a step-down transformer. It is not needed if the compensator is connected to the lower-voltage winding of an autotransformer. Next come the MV switchgear with disconnectors, earthing switches and instrument transformers, air-core line reactors connected in series with the thyristor valves in a delta arrangement, capacitor banks and harmonic filters. A filter consists of capacitors, reactors and resistors; it supplies capacitive power to the network and absorbs harmful harmonics.
The thyristor valve is assembled from series-parallel connected thyristors with auxiliary elements. Pulses are delivered by a photoelectric system through high-voltage optical fiber, one channel per thyristor. Cooling is by water, using deionized water with an external air heat exchanger. The valve stacks have a vertical design, and the valve unit is compact and convenient to arrange.
The control and protection system has a decentralized distributed structure and is easy to expand and to service remotely. It generates thyristor firing pulses, switches filters in sequence, monitors and protects the elements of the installation, and performs event recording and self-diagnostics. The operator works through a convenient HMI.
A reference installation is the ±360 Mvar SVC at the 750/66 kV Shazhou substation with a TCR+FC scheme in the second interconnection corridor between the Xinjiang and Northwest China power systems. The voltage swing at the installation site was reduced by about 20–25 kV, at neighboring substations by 10–12 kV, and the transfer capacity of the intersystem tie increased from 200 to 800 MW depending on the regime. Smaller versions also exist, for example an SVC of 100 Mvar at 110/35 kV.
Technical specifications
| Schemes | TCR, TSR, TSC, BSC/FC (thyristor-reactor, thyristor-capacitor, fixed filters) |
|---|---|
| Reference installation | ±360 Mvar, 750/66 kV, TCR+FC scheme (Shazhou substation) |
| Reference installation 2 | 100 Mvar, 110/35 kV, TCR+FC |
| Composition | step-down transformer, MV switchgear, air-core reactors, thyristor valves, capacitor banks/filters, cooling system, control and protection system |
| Thyristor control | photoelectric (light) control |
| Valve cooling | deionized water, external air heat exchanger |
| Applications | trunk networks, HVDC converter stations, industry, wind farms |
Request a price and lead time
PCS-9580 static var compensator (SVC) with thyristor control. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8504 40 90 00 |
|---|---|
| HS, 6 digits | 8504 40 |
| CN (EU) | 8504 40 90 |
| HTSUS (USA) | 8504 40 95 80 |
| China customs tariff | 8504 40 99 99 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What capacity and voltage has the PCS-9580 already been supplied for?
The references include an SVC of ±360 Mvar at the 750/66 kV Shazhou substation with a TCR+FC scheme. There is also a 100 Mvar version for a 110/35 kV network.
How are the thyristor valves of the SVC cooled?
The valves are cooled with deionized water, and heat is rejected through an external air heat exchanger. Thyristor control is photoelectric.
What facilities is the PCS-9580 suitable for?
For trunk networks, HVDC converter stations, industrial plants and wind farms. At Shazhou it raised the transfer capacity of the tie from 200 to 800 MW.
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