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-9700 Renewable Energy SCADA PCS-9726 Generation Management Unit PCS-9700F Power Forecast System PCS-9700R AGC/AVC
Battery Energy Storage System PCS-9567TU-1000/1250/1375/1575/1750 1500V Series Outdoor Power Conversion 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
Tingshan Frequency Converter Station of Hangzhou Flexible Low Frequency Transmission Pilot Project has been officially put into operation. It is the first time in the world to realize 220kV voltage level power frequency and low frequency controllable transformation.
Flexible low-frequency transmission is a new type of AC transmission technology whose frequency is lower than the power frequency, which can effectively improve the transmission capacity, distance and efficiency of transmission lines. It has certain application advantages in medium and long distance offshore wind power transmission.
In order to optimize the power grid layout in Hangzhou, and explore the application prospect of flexible low-frequency transmission technology in urban high-density load areas, State Grid Zhejiang Company has planned and built Hangzhou flexible low-frequency transmission Pilot project in Hangzhou.
The two high-voltage and high-capacity frequency converter stations in Tingshan and Zhongbu constructed in the project will form flexible low-frequency interconnection, which can realize flexible power flow mutual aid and asynchronous interconnection of the two major power grids in Fuyang and the south of Xiaoshan, improve the transmission capacity and flexibility of the two major power supply sections of 500kV Fuyang substation and 500kV Shengguang substation, improve the security and stability of the regional power grid.
Tingshan Frequency Converter Station is the first high-voltage and high-capacity low-frequency converter station in the world, and also an important part of Hangzhou flexible low-frequency transmission project. The NR project team has tailored flexible low-frequency protection & control system, frequency conversion valve, low-frequency AC protection device, measuring equipment and other core complete sets of equipment for Tingshan frequency conversion station. In view of the high voltage and large capacity application scenario of Hangzhou Flexible Low Frequency Transmission Project, the project team put forward efficient start stop control strategy, steady state control strategy, low-frequency open phase operation control strategy, fault ride through strategy, frequency converter protection strategy and low-frequency AC protection scheme, which solved many problems such as low-frequency decoupling control, bridge arm balance control, fault current suppression, low-frequency open phase operation, etc. At the same time, the project team overcame the problems of synchronous pressurization of converter valve at power frequency and low-frequency, completed the insulation test between high-voltage and high-capacity frequency converter valve power frequency and low-frequency terminals for the first time.
To build an advance power system with renewable energy as the main body has become the main development direction of the power industry. As a key high-tech enterprise, NR has carried out fruitful research and exploration in the field of building an advance power system. The complete set of flexible low-frequency equipment developed by NR has been successfully applied to Taizhou flexible low-frequency transmission project, and continues to serve the grid connected transmission of offshore wind power in Dachen Island. Hangzhou Flexible Low Frequency Power Transmission Project is an active attempt to apply flexible low frequency complete equipment to the construction of high elastic power grids in urban areas, and also provides a practical model for high-voltage and high-capacity offshore wind power transmission through low frequency. NR will continue to maintain high standards and quality to serve the project construction, give full play to its advantages, ensure the overall operation of the project, and continue to contribute to the construction of an advance power system.