考虑频率稳定的电力电子电源频率控制参数优化方法  

Frequency Control Parameter Optimistic Method of Converter-interfaced Generation Considering Frequency Stability

作　　者：王宝财 孙华东 李文锋 张健 赵兵 WANG Baocai;SUN Huadong;LI Wenfeng;ZHANG Jian;ZHAO Bing(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing 100192,China;State Grid Smart Grid Research Institute,Changping District,Beijing 102209,China)

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京市海淀区100192 [2]国网智能电网研究院有限公司,北京市昌平区102209

出　　处：《电网技术》2023年第5期1751-1761,共11页Power System Technology

基　　金：国家自然科学基金集成项目(U2166601):“高比例新能源场景下交直流混联电网的暂态稳定分析理论及控制方法”。

摘　　要：针对仅考虑大扰动频率指标的电力电子电源频率控制可能引发频率振荡的问题,提出同时考虑频率指标改善和频率振荡抑制2个方面的电力电子电源频率控制参数优化方法。首先,基于低阶频率模型分析了电压源型惯量控制和频率下垂控制对系统频率稳定的影响。在此基础上,研究了带延时环节的电流源型惯量控制响应特性,在抑制频率振荡方面,给出了可抑制频率振荡的惯量控制参数取值范围计算方法,避免惯量控制可能带来的振荡风险;在改善频率指标方面,电流源型惯量控制存在最优投入时间使扰动下频率最大偏差最小,同时给出了最优延时解析计算方法并分析了最优延时与系统调频参数的关系,实现了利用电力电子控制灵活性改善不同频率指标的目的。仿真算例验证了相关结论的正确性和所提方法的有效性,为电力电子电源惯量控制参数选取提供了理论依据。Aiming at the problem that the frequency control of the converter-interfaced generation only considers the large disturbance frequency index and causes frequency oscillation,in this paper,the frequency control of the converter-interfaced generation is analyzed regarding both the frequency index and the frequency oscillation.Firstly,the influence of the voltage source inertia control and the droop control on the system frequency stability is analyzed based on the lower order frequency model.On this basis,the response characteristics of the current source inertia control with time delay are studied.In the aspect of the frequency oscillation,the calculation of the value range of inertia control parameters that restrains the frequency oscillation is given.In the aspect of the frequency index,the current source inertia control has an optimal delay time to minimize the maximum frequency deviation.At the same time,the analytical calculation of the optimal delay is given and the relationship between the optimal delay and the system regulation parameters is analyzed.Relevant examples verify the correctness and effectiveness of the proposed method,and provide a theoretical basis for the selection of the inertial control parameters for the converter-interfaced generation.

关 键 词：频率稳定 频率最大偏差 频率振荡 惯量控制 最优延时 

分 类 号：TM21[一般工业技术—材料科学与工程]