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
Recently, the 35MVA high-voltage active power filter (HAPF) supplied in a complete set by NR was officially put into operation at the 220kV onshore centralized control center of CGN Daishan Wind Farm. The operation of this project has improved the grid connected power quality of Daishan Wind Farm, assisted in better consumption of clean and green energy for offshore wind power, and also marked a significant breakthrough for NR in the field of complex harmonic control of offshore wind.
Offshore wind power has advantages such as high power generation efficiency, no occupation of land resources, and proximity to coastal power load centers. It is of great significance for promoting green and low-carbon development. The total installed capacity of CGN Daishan offshore wind power is 516MW, which is integrated into the Zhejiang power grid through 220kV Changjiao substation and other facilities. However, the capacitive impedance of long-distance submarine cables is prone to resonance with the system, leading to harmonic problems, especially the impedance properties of 5th and 7th harmonics are different, affecting the transmission of offshore wind power.
Zhejiang Grid Company conducted RTDS comparison and testing of solutions from multiple manufacturers at Zhejiang Electric Power Research Institute. NR innovatively proposed a comprehensive harmonic voltage and current control plan, and successfully undertook the CGN Daishan Sea Wind Harmonic Control Project with superior harmonic control simulation test results.
After the operation of CGN Daishan High Capacity HAPF project, under the harmonic current control mode, the 5th and 7th harmonic current suppression ratio of the grid connection point has reached over 95%. Under the comprehensive management mode of harmonic voltage and current, achieving the control of harmonic current at network points below the grid code limit, minimizing harmonic voltage, and achieving comprehensive power quality control of harmonic voltage and current.
NR has been continuously committed to the research and engineering application of flexible AC equipment. The largest single set of STATCOM with a capacity of 35kV/± 150Mvar in China has been put into operation at the 500kV Pengcheng Station and ± 800kV ultra-high voltage Dongfang Converter Station of the Southern Power Grid, continuing to maintain NR's leading position in the industry.
The high-performance HAPF equipment of NR has multiple governance modes such as harmonic current, harmonic voltage, and voltage current integration, with strong applicability. It has been widely applied in fields such as power grid, new energy, rail transit, steel, coal, etc. NR continuously develops and breaks through in the field of power quality management, always providing users with comprehensive high-quality solutions with exquisite technology, reliable products, and first-class services.