Protection&Control Transmission Line Protection Busbar Protection Transformer Protection Circuit Breaker Protection Generator Protection Feeder Protection Capacitor Protection Motor Protection Transfer & Synchronization Arc Protection
Digital Substation PCS-221S Merging Unit PCS-221 Merging Unit PCS-222 Circuit Breaker Controller PCS-9250 AC Electronic CT/VT
Automation PCS-9700 Automation System PCS-9700 HMI Software PCS-9705 Bay Control Unit PCS-9705S Bay Control Unit PCS-9799 Station Manager PCS-9799S Station Manager PCS-9710 Remote Terminal Unit PCS-9710S Remote Terminal Unit PCS-9794 Protocol Converter PCS-9785 Satellite-Synchronized Clock PCS-9882 Ethernet Switch PCS-9882Rx DIN Rail Managed Ethernet Switch PCS-9882XD Managed Ethernet Switch PCS-9884 Managed Ethernet Switch Supporting HSR and PRP MUX-2M/64 Communication Interface
Phasor Measurement PCS-997S Fault Line Locator PCS-996S-G Phasor Data Concentrator PCS-996 Phasor Measurement Unit
Disturbance Fault Recording PCS-996RC Disturbance Fault Recorder PCS-996R Disturbance Fault Recorder PCS-986 Disturbance Fault Recorder PCS-9013 DFR Management System
Stability Control System PCS-992 Power Stability Control System PCS-993 Out-of-Step Controller PCS-994 Frequency & Voltage Controller PCS-994S Frequency and Voltage Controller
Power Grid Monitoring and Control PCS-9000 Energy Management System PCS-9000 Distribution Management System
Configuration Tool PCS-Torch MOT Tool PCS-Studio Configuration Tool PCS-Explorer IED Configuration & Debugging Tool PCS-SCD Configuration Tool PCS-COMM Configuration & Debugging Tool
Accessories MD1501 Series Auxiliary Relays MD1701 Series Test Blocks MD1701S Test Block
FACTS PCS-9580 Static Var Compensator PCS-9583 Static Synchronous Compensator PCS-9570 Series Compensation PCS-9590 DC De-Icer PCS-9578 Controllable Shunt Reactor PCS-8200 Unified Power Flow Controller PCS-9571 Fault Current Limiter PCS-9564A Dynamic Voltage Restorer PCS-9569 Shore Power System
HVDC PCS-8600 UHVDC Converter Valve System PCS-9550 LCC-HVDC Control and Protection System PCS-8100 VSC-HVDC IGBT Valve PCS-9520 VSC-HVDC Control and Protection System PCS-9510 Cooling System PCS-8300 High-voltage DC Circuit Breaker PCS-9250 DC Electronic CT/VT
PV & Wind Power Grid-Connection PCS-9561 Wind Energy Converter System PCS-9700 Renewable Energy SCADA PCS-9726 Generation Management Unit PCS-9700F Power Forecast System PCS-9700R AGC/AVC PCS-9563 PV Grid-Connected Inverter
Battery Energy Storage System PCS-8811CB Centralized energy storage system PCS-8812PB Liquid cooled energy storage cabinet PCS-8813CPB High voltage directly connected energy storage system PCS-9567A Power Conversion System PCS-9567C BESS Control Unit PCS-9700 Energy Storage System
Microgrid PCS-9617MG Microgrid Controller
Static Frequency Converter PCS-9575 Static Frequency Converter
Protection,Automation&Control DMS EMS Stability Control & WAMS Digital Substation
HVDC & FACTS De-Icing Unified Power Flow Controller (UPFC) Series Compensation Static Synchronous Compensator(STATCOM) Static Var Compensator (SVC) LCC-HVDC Transmission VSC-HVDC Transmission
Renewable & Microgrid Energy Storage System Microgrid PV Generation SFC
Power Generation Pumped Storage Power Plant Nuclear Power Plant Hydro Power Plant Thermal Power Plant
Transmission System AC Transmission LCC-HVDC Transmission VSC-HVDC Transmission
Distribution System Distribution Network
Industrial Consumer Urban Track Traffic Electrified Railway Oil & Petrochemical Metals & Mining
The first 50MVar renewable energy distributed synchronous condenser in China successfully completed 168 hour trial operation in 330kV Xuming substation and was officially put into operation recently.
This also marks the successful delivery of NR's first distributed synchronous condenser protection & control system, which will escort the output of clean energy in Qinghai for a long time in the future and contribute to the realization of China's carbon neutral goal.
NR continues to lead the development of distributed synchronous condenser protection & control technology after the batch application of the new generation 300MVar large synchronous condenser protection & control system of the State Grid.
At clean energy base located at the transmission end of ± 800kV Qingyu HVDC project, the installed capacity of renewable energy power supply accounts for more than 60%. There are problems such as huge uncertainty and large fluctuation, resulting in large changes in reactive power demand at the transmission end of power supply, weak voltage support and stability problems to varying degrees, which restricts the transmission capacity of Qingyu HVDC.
The distributed synchronous condenser can be configured locally at the power supply side of renewable energy. It has the advantages of wide distribution, high integration and flexible operation. It can effectively solve the problem of insufficient reactive power support and stability in the renewable energy area, realize steady-state, transient and sub transient regulation at the same time, and become the "stabilizer" of clean energy delivery. The protection & control system is the "brain" for the orderly start & stop and safe operation of the synchronous condenser. It plays an important role in the renewable energy export project.
As the core equipment, the SFC startup system is responsible for dragging the speed of the condenser to above the rated speed to realize the idle speed synchronization and grid connection. Its successful speed increase is the prerequisite for the successful operation of the condenser. Xuming substation has 5 distributed synchronous condenser and 2 sets of SFCS. Each set of SFC can drag every machine to speed up to realize the 2 SFCS with 5 condensers function. This is the first application in China, and the control difficulty is several times higher than the conventional mode.
Based on the existing experience, the project team sort out the drive sequence control process in advance, identifies the isolation logic between multiple machines, and optimizes the initial position detection, initial torque and other parameters to ensure the success of unit drive at first time.
The DCS system is required to conduct overall control and monitoring throughout the operation of the condenser. The distributed condenser is quite different from the centralized condenser in terms of cooling mode and operation sequence, such as the control of the air conditioning system and the unit without jacking oil pump, which brings great challenges to DCS. The project team actively analyzes the new features and requirements of the distributed condenser, cooperate with all parties to jointly formulate the most reasonable control process and logic to ensure the smooth start of the unit.
NR condenser project team has completed the application of 21 centralized 300MVar condenser projects and accumulated rich experience in development, design and engineering commissioning. During the implementation of the distributed condenser project, these experience of control interface, sequence control process, logic configuration and protection strategy help a lot..
The operation of the first unit is just the beginning, and there will be a large number of units to be implemented in the future. The project team will continue provide customers with high-quality products and services.