PCS-9550 / PCS-9520 — control and protection systems for LCC-HVDC and VSC-HVDC transmission
NR PCS-9550 and PCS-9520 are control and protection systems for DC transmission, for thyristor LCC-HVDC and for voltage source converter VSC-HVDC SuperCon. They keep the transmission in a safe and stable state, regulate power accurately, clear faults and restore operation after disturbances. They suit new projects and the refurbishment of existing lines.
- Platform
- UAPC, CPU + DSP + FPGA, optical field buses
- Redundancy
- full parallel redundancy at all levels, two independent sets for VSC
- PCS-9550 (LCC)
- substation SCADA, AC/DC station control, pole control (pulse generation, angle regulation, OLTC), protection of the pole, filters and converter transformer
- PCS-9520 (VSC)
- system, station and converter levels in one host, CAN bus, coordination with FACTS
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Both systems are built on the proprietary UAPC platform from modular functional units connected by high-speed optical links. There is one design criterion, maximum reliability of the transmission, so all parts involved in power transfer have parallel redundancy.
The PCS-9550 works with thyristor transmissions. It makes it possible to use the advantages of direct current in full: bulk power transmission over long distances, underground and submarine cable lines, and asynchronous interconnection of power systems. The structure is hierarchical and distributed. The station-level SCADA and the equipment level with control and protection units, input-output devices and the field bus are connected by a redundant LAN. There is an interface with remote dispatch centers (telecontrol workstations, RTU) and an operator control system with its own LAN, operator and engineer workstations, servers and time synchronization.
AC and DC substation control in the PCS-9550 covers sequential control of the switchyard equipment, execution of protection commands, filter switching and interlocking. DC control for the bipole, pole and converter unit generates and synchronizes valve pulses, performs soft start and stop, and regulates the firing angle and the OLTC of the converter transformers. DC protection covers the pole, the DC filters, the converter transformer and the AC filters.
The PCS-9520 is built on plug-in CPU, DSP and FPGA modules. The CPU is responsible for settings and display, the DSP calculates control and protection algorithms, communication with the SCADA runs over high-speed Ethernet, and a CAN bus operates inside the system. Each VSC transmission has two independent sets of control and protection and multichannel transient recording. The functions of the system, station and converter levels are combined in one host, so there are fewer interfaces and availability is higher.
The systems work with electronic and optical measuring devices and coordinate control with AC systems and FACTS devices over digital channels. They provide duplicated power supply, a hybrid Unix/Linux + Windows platform, remote servicing, a personnel training simulator and a backup local control system. Parameters and station-level data are sent to the regional and national dispatch centers, and from there commands and setting changes arrive when needed. The national center has the higher control priority.
Technical specifications
| Platform | UAPC, CPU + DSP + FPGA, optical field buses |
|---|---|
| Redundancy | full parallel redundancy at all levels, two independent sets for VSC |
| PCS-9550 (LCC) | substation SCADA, AC/DC station control, pole control (pulse generation, angle regulation, OLTC), protection of the pole, filters and converter transformer |
| PCS-9520 (VSC) | system, station and converter levels in one host, CAN bus, coordination with FACTS |
| Measurement | support for electronic and optical sensors |
| Application | new projects and refurbishment of DC lines, cable and submarine transmission, asynchronous links |
Request a price and lead time
PCS-9550 / PCS-9520 — control and protection systems for LCC-HVDC and VSC-HVDC transmission. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 10 98 00 |
|---|---|
| HS, 6 digits | 8537 10 |
| CN (EU) | 8537 10 98 |
| HTSUS (USA) | 8537 10 91 70 |
| China customs tariff | 8537 10 90 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How does the PCS-9550 differ from the PCS-9520?
The PCS-9550 controls thyristor LCC-HVDC transmissions. The PCS-9520 is intended for transmissions with voltage source converters, VSC-HVDC SuperCon.
How is the control system made redundant?
All parts involved in power transfer have parallel redundancy. Each VSC transmission has two independent sets of control and protection.
Are the systems suitable for the refurbishment of existing DC lines?
Yes, both systems are used in new projects as well as in refurbishment. They support electronic and optical measuring devices.
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