PCS-8600 / PCS-8100 — converter valves for DC transmission (thyristor LCC and IGBT VSC-MMC) with the PCS-9510 cooling system
NR PCS-8600 and PCS-8100 are converter valves for DC substations: LCC thyristor valves (type tested at ±800 kV / 6250 A) and MMC IGBT valves up to ±535 kV / 3000 MW. NR supplies the PCS-9510 water cooling system for them. The equipment works on long-distance transmission lines, back-to-back DC links and in multi-terminal grids.
- PCS-8600 (LCC/UHVDC)
- thyristor valves for ±800 kV / 6250 A transmission and above; valves, VCU, cooling system
- PCS-8100 (VSC-MMC)
- IGBT valves of a modular multilevel converter, proven up to ±535 kV / 3000 MW (type tests with the participation of DNV GL, 2017)
- Material fire resistance
- UL94-V0 (PCS-8600)
- Layout
- U-shaped multi-tier frame with a service channel (8600); vertical towers, linear and U-shaped layouts (8100)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The manufacturer supplies valves for the largest projects in China. The orders include the ±1100 kV / 12 000 MW ultra-high-voltage Changji–Guquan transmission line, 3324 km long.
The PCS-8600 is intended for line-commutated converter (LCC) DC lines, including ultra-high-voltage ones. The system consists of valves, the valve control unit VCU and water cooling. The converter is built on a twelve-pulse scheme from valve towers; a tower consists of tiers, a tier of modules, and a module of assemblies. The valve contains thyristors, heat sinks, grading and snubber circuits, saturable reactors, thyristor control units TCU and surge arresters. Type tests were carried out at ±800 kV / 6250 A. The layout is U-shaped, flat and multi-tier, with a recessed service channel, and the tiers are connected by suspension insulators for seismic resistance.
In the PCS-8600 the water and electrical circuits are separated, and the materials are self-extinguishing, class UL94-V0. The snubber parameters are chosen for lower losses, and the heat sink channels are turbulence-inducing. The TCUs have dual self-powering at high potential and are not affected by voltage dips, and a variable pulse duration rules out false tripping during no-load tests. The VCU converts commands of the control system into pulses for the TCUs, performs online monitoring of the main elements and quickly localizes channel faults.
The PCS-8100 is an IGBT valve of a modular multilevel converter (MMC) for HVDC SuperCon transmission. The valve of each phase is assembled from submodules with an IGBT and a capacitor and from series reactors. By changing the number of switched-in submodules, the output voltage and power are regulated flexibly with low harmonics and a low switching frequency. The design is modular and vertical, and a linear or U-shaped layout is chosen to suit the voltage, power and site. Digital drivers, submodule overvoltage protection and patented heat removal extend the service life of the IGBTs. Type tests of the valve were passed with the participation of DNV GL in 2017.
The PCS-9510 cools the power electronics valves. A closed internal circuit removes heat from the valves, an external circuit cools the coolant in a water-to-water or water-to-air scheme, and a separate control and protection system supervises operation. The cooling system can be serviced without stopping the transmission.
Technical specifications
| PCS-8600 (LCC/UHVDC) | thyristor valves for ±800 kV / 6250 A transmission and above; valves, VCU, cooling system |
|---|---|
| PCS-8100 (VSC-MMC) | IGBT valves of a modular multilevel converter, proven up to ±535 kV / 3000 MW (type tests with the participation of DNV GL, 2017) |
| Material fire resistance | UL94-V0 (PCS-8600) |
| Layout | U-shaped multi-tier frame with a service channel (8600); vertical towers, linear and U-shaped layouts (8100) |
| Thyristor control | TCU with dual self-powering, variable pulse duration |
| PCS-9510 cooling | closed internal water circuit, external water-to-water or water-to-air, cooling control and protection system |
| Application | long-distance transmission, back-to-back DC links, multi-terminal grids |
Request a price and lead time
PCS-8600 / PCS-8100 — converter valves for DC transmission (thyristor LCC and IGBT VSC-MMC) with the PCS-9510 cooling system. 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
At what ratings were the PCS-8600 thyristor valves tested?
Type tests of the valves were carried out at ±800 kV / 6250 A. The valves also operate on the ±1100 kV / 12 000 MW Changji–Guquan transmission line.
Up to what voltage and power are the PCS-8100 IGBT valves proven?
Up to ±535 kV / 3000 MW. Type tests were passed with the participation of DNV GL in 2017.
How are the valves cooled?
By the PCS-9510 system with a closed internal water circuit and an external water-to-water or water-to-air circuit. Servicing is possible without a shutdown.
Similar equipment from other manufacturers
