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 August 26, 2022, the distributed photovoltaic (PV) group control device for active distribution network developed by NR, completed the on-site function and performance test in Fujian CATL Industrial Park and was put into operation. The device has functions such as active power control, voltage control, reactive power control, and power factor control etc.
The test results show that the power control response time is less than 5s, the control accuracy can reach 1%, and all performance indicators meet the requirements of the Fujian Province distributed PV regulation and control technical specifications. This successful application has effectively improved the flexibility and controllability of the active distribution network, the rapid adjustment of the power grid and the voltage stability level. It is a beneficial attempt and practice for the large-scale development of distributed PV.
With the rapid development of low-voltage distributed PV, the problems of over-voltage and heavy overload in the distribution network are becoming increasingly prominent. It is important to study the distributed PV group control technology in depth to improve the power grid's ability to connect distributed PV safely.
At present, the distributed PV power stations connected to the medium and low voltage distribution network are small in one station capacity, but large in number. There are higher requirements for the group dispatching and control devices, the convenience of implementation, and the flexibility of control.
Relying on years of research results in the field of renewable energy and active distribution networks, NR has developed a distributed PV group control device based on advance protection and control architecture, which has the characteristics of convenient implementation, flexible expansion and high integration. The device integrates telecontrol communication, communication management, group regulation and control functions, and has constant active and reactive power, voltage, power factor and other control modes. As the aggregation center of regional distributed PV power and voltage regulation, it realizes accurate power control in the region. At the same time, it supports GOOSE communication protocol, which can meet the requirements of fast control such as primary frequency modulation and fast voltage regulation. The application of the device greatly improves the regulation ability of distributed PV, alleviates the problems of peak regulation and voltage over-limits caused by the large-scale development of distributed PV, and ensures the safe & reliable operation of the advance power system.
As a leading enterprise in the field of power system protection & control, NR has long been committed to the research & development of overall solutions and related products for the protection & control system of active distribution networks. It has a complete series of products and overall solutions in the fields of rapid protection and self-healing of distribution networks, integrated collaborative control of transmission and distribution power grids, cloud management edge optimization and control, regional autonomous control and so on. NR will keep to more contribution for the development of the advance power system.