■ System Introduction
By using a frequency measurement device to collect the voltage frequency and active power of the grid connection point, when the power system frequency deviates from the target frequency, the main control equipment adjusts the active output of the wind turbine and photovoltaic inverter to achieve frequency support for the power grid.
■ Product composition
Frequency measurement device, main control equipment, monitoring host, switch and other equipment
■ Product features
Operating System: The system runs on the domestic Linux platform, which is safe and reliable
Temporal database: The system is developed based on NseaDB Xihe database, with millisecond resolution data storage
Fast speed: Frequency sampling period:<100ms
High accuracy: Frequency measurement error:<± 0.002Hz, supports microsecond level resolution recording
High reliability: All hardware platforms have passed electromagnetic compatibility testing by the China Electric Power Research Institute and meet the strictest EMC level 4 standards for power electromagnetic compatibility.
Advanced algorithm: complete control strategy, high control accuracy, fast adjustment speed
Strong communication capability: supports multi-party systems and multiple communication protocols (such as Modbus, IEC104, IEC61850, OPC, and customized communication protocols)
■ Product advantages
• Meet the technical requirements for primary frequency regulation of power grids in various provinces across the country, support field level virtual inertia technology support, and support remote testing functions.
All software modules are developed based on domestic operating systems, databases, and application software, with independently controllable code and adapted to domestic servers and processors.
Based on a time-series database design, it supports millisecond level data storage and can accurately evaluate the speed and accuracy of a frequency modulation.
Deeply cooperate with multiple domestic fan host manufacturers, optimize technology for various types of fans, and greatly improve the speed and accuracy of primary frequency regulation. Meet the primary frequency regulation standards of various provincial power grid companies, support active testing, frequency recording, virtual inertia, dual host redundancy configuration and other functions.
Industry influence
The NseaVSG new energy power station rapid frequency response system product has been selected as a new technology achievement of State Grid Corporation of China in 2021;
Zhongtai Huadian participated in the compilation of the primary frequency regulation industry standard TCSEE0275-2021 "Technical Specification for Primary Frequency Regulation Performance Testing of Wind Farm".