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
Luxi Island microgrid system, which was designed, supplied, commissioned and delivered by NR, has been successfully put into operation.
The system effectively solved the black start problem of 10kV feeder level microgrid with impulsive load, and has won high recognition from users with advanced and intelligent control strategy, stable and reliable microgrid system.
Luxi Island is located on the east coast of China. The power supply of Luxi Island was transmitted remotely by submarine cables, which was easy to cause power supply interruption due to cable and tower damage. Due to the weak load carrying capacity of the original microgrid system, complex black start steps, difficult operation and low success rate, once the power was cut off, the recovery time was long, which seriously affects the production and life of residents on the island.
NR provides microgrid integrated solutions including microgrid energy management system, microgrid coordination controller, energy storage converter and other core equipment, which effectively solves the existing problems.
Microgrid system was required to quickly restore power supply after power loss of large power grid, and black start function was the most important means to restore power supply and an important guarantee for stable operation of the system. 10kV distribution network feeders usually have a large number of T-connected transformers, large load capacity. The simultaneous start of transformer inrush current and a large number of motor loads was easy lead to black start failure. The automation level of the existing distribution network system was low, relying on the manual opening and closing switch of the operation and maintenance personnel, and the power failure time of the system was long. In view of these problems, based on the long-term accumulation in the research of microgrid technology, NR successfully realized the black start function under the condition of full input of 10kV feeder load through intelligent one key black start control and flexible synchronous parallel start technology of multiple converters. The whole process took less than 10s from the issuance of command to the stable establishment of bus voltage, and quickly realized power supply restoration of 18 transformers, 1359 resident users and 177 non-resident users. The power supply reliability of Luxi Island has been significantly improved.
The successful implementation of the project has further consolidated the technical advantages of NR in the field of microgrid, and provided the solution for the local autonomy of the new distribution system with high distributed energy resource penetration. NR will continue to practice the corporate purpose of "creating value and serving the society", and contribute more to the development of reliable green power system.