摘要
光储联合发电系统能够有效平抑功率波动、改善光伏发电质量。为了探究组网型控制策略应用在光储联合发电系统时的暂态特性,在考虑直流侧电容动态特性的工况下,本文分析了一种光储联合发电系统在发生三相接地短路和频率跌落故障时,采用虚拟同步发电机(VSG)控制和直流母线电压/无功功率控制(DC bus voltage and reactive power control,DCVQ)两种不同组网型控制策略的电磁暂态特性。首先根据光储联合发电系统的外特性建立数学模型,然后通过Matlab/Simulink搭建仿真模型对比研究两种组网型控制方式在面对不同类型故障时的暂态稳定能力,研究结果表明DCVQ控制具有更好的耐受电压扰动能力,VSG控制具有更强的频率扰动耐受能力。
The combined photovoltaic and energy storage generation system can effectively smooth out power fluctuations and improve the quality of photovoltaic power generation.In order to further explore the transient characteristic of application of grid-forming control strategy to optical storage combined power generation system,considering the capacitive dynamic characteristic of DC side bus,a specific optical storage combined power generation system of such two grid-forming control strategies as virtual synchronous generator(VSG)control and DC bus voltage and reactive power control(DCVQ),are adopted in case of three-phase ground short circuit and frequency drop of combined photovoltaic and energy storage generation system.Firstly,the mathematical model is set up in accordance with the external characteristics of the optical storage combined power generation system,and then the simulation model is set up by Matlab/Simulink to analyze and compare the transient stability ability of the two grid-forming control modes in the face of different types of faults.It is shown by the study result that DCVQ control has better resistance to voltage disturbance and VSG has stronger tolerance to frequency disturbance.
作者
朱克平
何英静
姜卫同
朱鹏程
胡鹏飞
ZHU Keping;HE Yingjing;JIANG Weitong;ZHU Pengcheng;HU Pengfei(Economic and Technological Research Institute of State Grid Zhejiang Electric Power,Hangzhou 310008,China;School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《电力电容器与无功补偿》
2023年第5期108-115,共8页
Power Capacitor & Reactive Power Compensation
基金
浙江省自然科学基金(LQ21E070004)
中央高校基本科研业务费专项资金。
