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 June 26, 2021, after 168 hours of trial operation, Yazhong Jiangxi ±800 kV HVDC transmission project was officially put into operation. NR provides a complete set of core equipment for the project, such as UHV converter valve, protection & control, valve cooling, synchronous condenser secondary system, measurement and fire protection system etc.
Yazhong Jiangxi project starts from Yanyuan County, Sichuan Province, passes through 5 provinces, and ends in Nanchang City, Jiangxi Province. The line length is about 1696 km and the transmission capacity is 8000 MW.
The project is a key channel for hydro, wind and solar power transmission in the western and southern Liangshan area. After this project is put into operation, the surging power from the middle reaches of the Yalong River will light up the urban and rural areas along the Poyang Lake. At the same time, the Yazhong Jiangxi project also supports the power transmission of the first batch of units of Baihetan power station and promotes the intensive development and utilization of wind & solar resources in Western Sichuan.
The protection & control system focuses on improving the safety and reliability. The project summarizes the previous implementation and operation experience of UHVDC, and adopts the asynchronous control technology of tap changer for the first time, which reduces the regulation times of tap changer and reduces the risk of on-site accidents. At the same time, considering the diversity of operation modes, the protection & control system of Yazhong Jiangxi project develops the reactive power control function of converter station to adapt to the operation of multi bus section.
In the aspect of converter valve, several key components such as equalizing resistor, radiator and top suspension mechanism of converter valve were upgraded and optimized comprehensively. The test and inspection s were strictly controlled to ensure the engineering quality. In the production and transportation, the new packaging process of converter valve module was developed to ensure the transportation quality. In the project implementation, the test process was comprehensively optimized to improve the quality and efficiency. It has passed the tests of harsh transportation conditions in the depth of Daliang Mountain, 2550 meters above sea level and 9 magnitude earthquake protection.
NR provides Yazhong Jiangxi project with valve cooling system, which is deeply integrated with converter valve and protection & control system. The valve cooling control system and DC protection & control system adopt the same UAPC platform, realizing seamless integration, greatly improving system reliability, and operation & maintenance efficiency.
The smooth implementation of Yazhong Jiangxi project highlights NR’s comprehensive capability in the field of HVDC system. NR will continuously develop new technologies and expand new applications, provide customers with advanced technologies, reliable products and high-quality services, and serve the power industry.
