虚拟同步发电机参数设计及优化方法

Methods of parameter design and optimization in virtual synchronous generator technology

为了解决目前虚拟同步发电机技术中没有成套的参数设计方案及其优化方法的问题,引入钟庆昌教授的Synchronverters技术,提出一套完整的虚拟同步发电机参数设计方法及其优化策略。针对不同参数对系统响应会有不同影响的现象,应用控制变量法,分别改变阻尼系数Dp、转动惯量J、电压下垂系数DQ和积分系数K的值进行仿真和实验。通过对虚拟同步发电机在离网状态和并网同步过程中动态响应的超调量和响应速度的判断和分析,分别对上述四种参数进行优化,揭示了时间常数τf和τv的物理意义。实验证明:所提出的设计方法和优化策略能快速而准确地选择出最合适的参数,具有较好的实用性。

In order to solve the problem that there isn＇t a set of design method and its optimization strategy in the virtual synchronous generator technology, this paper introduces Professor Qing-Chang Zhong＇s Synchronverters Technology, and comes up with a complete parameter design method and its optimization strategy of virtual synchronous generator. Because different parameters have different effects on system response, it applies variable control method, changes the value of damping coefficient Dp, Moment of inertia J, the voltage dropping coefficient DQ and integral coefficient K respectively and performs simulation experiments. The above four parameters are optimized and the physical meanings of the time constants τf and τv are revealed by judging and analyzing the overshoot and response speed of system response when the virtual synchronous generator is in the off-grid state and the grid synchronization process. Experiments show that the proposed design method and optimization strategy can quickly and accurately select the most appropriate parameters with good practicality.