基于虚拟同步机技术的储能机电暂态特性建模

虚拟同步机技术通过模拟传统同步发电机特性，使采用变流器的电源具有同步机组的惯量、阻尼、频率和电压调整等运行外特性，是解决新能源发电接入电网稳定运行的重要技术手段。提出一种用于机电暂态的虚拟同步机控制储能建模方法。该储能模型包括虚拟同步机控制、储能限制模块和模型接口模块，并考虑虚拟同步机定转子方程和储能充放电功率、荷电状态、运行效率、死区及逆变器限制特性。基于电力系统分析综合程序，采用用户自定义方式搭建模型。以IEEE 4机2区域和河南电网为例进行模型有效性验证，结果表明了所提建模技术相比于传统方法的优势。

Electromechanical transient modeling of energy storage based on virtual synchronous machine technology

By simulating the characteristics of the traditional synchronous generator, virtual synchronous machine technology allows the power supply using the converter to have the characteristics of inertia, damping, frequency and voltage adjustment of the synchronous generator. It is an important technical means for the stable operation of the new energy power generation connected to the power grid. This paper proposes an electromechanical transient modeling method of energy storage based on virtual synchronous machine technology. The energy storage model includes virtual synchronous machine control, energy storage restriction and a model interface module, and takes into account the rotor equation of the virtual synchronous machine, energy storage charge and discharge power, charged state, operating efficiency, dead zone and inverter limitation characteristics. Based on power system analysis and a synthesis program, the model is built by a user-defined method. The IEEE 4 machine 2 region and Henan power grid are selected for simulation verification. The simulation results show that the modeling technology proposed has advantages over the traditional method. This work is supported by the National Natural Science Foundation of China (No. 51607158).