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
On November 28, 2020, the Static VAR Compensator (SVC) supplied by NR Electric, successfully put into operation in "220kV BA’ER substation" of Ali power network project. It has become one of the highest SVC system in the world, and it is also the successful application of SVC project in extremely weak power grid, which has great engineering significance.
The transmission lines of Tibet power grid is long and the network structure is weak. The transmission capacity and short-circuit capacity of the power grid change greatly in the wet and dry season, resulting in the voltage fluctuation of the power grid. Ali power grid belongs to the terminal power grid of Tibet and the grid structure is particularly weak. A small disturbance will cause voltage fluctuation of tens of kV in power grid, which may cause insulation damage of equipment, even lead to voltage collapse or grid disconnection. After SVC is put into operation, it plays an important role in stabilizing terminal grid voltage, increasing system damping, rapidly providing voltage and reactive power support, accelerating voltage recovery and playing an important role in the safe & stable operation of Tibet power grid.
Extremely weak current network has great challenge to SVC control strategy and performance. SVC too fast response may cause power grid oscillation, too slow response cannot meet the control speed and the role of voltage & reactive power support in case of fault. NR SVC solution has the function of gain monitoring and optimization. It can’t only ensure fast response speed in extremely weak system, but also can’t cause system oscillation. It has high adaptability for extreme weak current network and occasions with large short-circuit capacity change.
This SVC is located in 220kV BA’ER substation. The environment is extremely bad, the altitude of the station is 4688m, the minimum temperature is - 40 ℃, the temperature difference between day and night is 25 ℃, the extremely low temperature, strong ultraviolet radiation, strong wind and sand weather bring great challenges to the engineering design. In addition, the air in high altitude area is thin and the climate is bad NR has set up a project team with excellent engineering and management experience. It evaluated every stage of project design, construction and commissioning and the delivery of the system with high quality, which is highly recognized by the customer.
The succesul commission of this project is a benchmark for NR SVC system applied in high altitude and weak grid. NR offers field proven FACTS solution to solve reliability and efficiency problems in power system. The complete FACTS solution will help to increase transfer capacity and ensure quality of your next generation smart grid.