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 April 28, 2024, the Yangzhou-Zhenjiang ±200kV DC Transmission Project (hereinafter referred to as "Yangzhen DC") was officially put into operation. It will take up the responsibility of large-scale renewable energy consumption across the river in the northern Jiangsu Province, effectively reduce the burden of the existing river crossing, and greatly enhance the north-south transmission capacity of electricity.
Yangzhen DC , with a line length of about 110km and a rated transmission capacity of 1,200MW, is the first "AC to DC conversions " project in China, which utilizes the existing Wufeng Mountain crossing of the Yangtze River to transform an AC transmission line into a DC transmission line for the first time. The successful implementation of the project has provided a solution for the power transmission engineering field to solve the problems of grid development, such as high demand for electricity, high saturation of the power grid, and limited right-of-ways for new line construction.
Yangzhen DC nameplate converter station and Wufengshan big span transmission li
NR Electric has provided key equipments such as DC control and protection system, converter valve, converter valve cooling system, measurement system, stabilization control, AC protection, AC measurement and control, DC line fault location system for Yangzhen DC project.
In Yangzhen DC, NR Electric firstly proposed a restart strategy based on fault current control, which can maintain 50% of the transmission power during the fault period, significantly reducing the impact of DC line faults on the AC system and improving the restart success rate. This strategy has been successfully restarted in all 6 times DC line fault tests in the project site. At the same time, Yangzhen DC control and protection system also provides intelligent reminder of fault list, intelligent display of different types of keyword alarm events and fully automatic power control, which greatly improves the system operation and maintenance.
Schematic of restart condition of Yangzhen DC based on fault current control
DC converter valves
The valve cooling system provided by NR Electric is deeply integrated with the converter valve, and the valve cooling control and protection system adopts the same platform with the DC control and protection system to realize seamless connection, which greatly improves the system reliability and operation & maintenance efficiency.
Converter valve cooling system
Measuring system
DC line fault location system