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 December 30, 2020, after 168 hours of trial operation, Qinghai-Henan ± 800kV UHVDC transmission project was officially put into operation.
The Qing-Henan project is the first UHVDC project built for clean energy outsource in China. It is an important measure to achieve China's commitment to carbon peak in 2030 and the carbon neutral target in 2060.
The project starts from Hainan Prefecture of Qinghai Province and ends in Zhumadian area of Henan Province. It passes through Qinghai, Gansu, Shaanxi and Henan provinces. The total length of the line is 1587 km and the transmission capacity is 8 GW. After it is fully put into operation, it can transmit 40TWh of green and clean power to Henan every year, which has greatly promoted the development and utilization of renewable energy in the south of Qinghai Province.
NR provides a complete set of core equipment for Qing-Henan project, including HVDC converter valve, protection & control, valve cooling tower, synchronous condenser secondary system, measurement system, DC voltage divider, stability control system, AC protection, CAFS control system, fire automation, grounding electrode online monitoring , etc.
NR has comprehensively researched and developed the key technology of UHVDC transmission application in high altitude areas. As the only UHVDC transmission project in the world that mainly transports photovoltaic, wind power and other renewable energy, the overvoltage of power at the sending end will seriously affect the stability of power grid and limit the transmission capacity of DC.
Aiming at this problem, NR has carried out a number of special protection & control strategy studies, and carried out more than 300 verification tests, which ensured the safety & reliability and made the new strategy become the "centering agent" for the stable operation of Qing-Henan DC project.
In view of the special harsh environment of high altitude and severe earthquake magnitude where Qingnan converter station is located, the converter valve system experts have carried out a special project to optimize the design, check the primary and secondary equipment from the main parameters, insulation, heat dissipation, electric field and other aspects. All products have passed the third party verification, which provides a solid technical guarantee for the reliable output of renewable energy.
The valve cooling system developed by NR provides stable and reliable cooling support for the converter valve. The new design reduces the site area, makes the maintenance convenient and the service life of the equipment long.
NR provides a complete secondary solution for the 4 sets of * 300Mvar synchronous condenser, which optimizes and improves the integration of synchronous condenser monitoring and DC protection & control, reactive power coordination control between the condenser and DC protection & control, overcomes the problem of long-distance transmission of renewable energy, significantly improves the convenience of operation and maintenance in the station, and improved the dynamic reactive power support capacity of condenser.
In order to adapt the flexible operation mode of AC power grid, aiming at the characteristics of high proportion of renewable energy in power grid, the stability control system adopts the scheme of region, type and multi resource collaborative optimization to ensure the delivery and consumption of clean energy to the maximum extent.
NR PCS-9119CAFS fire linkage control system can realize the automatic start of the compressed air foam spray and firefighting system in the whole station and the equipment monitoring.
The successful implementation of Qing-Henan project shows the technical advantages of multi-disciplinary integration and the implementation ability of team cooperation of NR, highlights the outstanding comprehensive strength of NR in the field of UHV equipment in high altitude and cold regions.
NR will continue to research and provide reliable and flexible HVDC soluton for our customer.