基于动态相对增益的逆变器耦合评价与解耦方法  

INVERTER COUPLING EVALUATION AND DECOUPLING METHOD BASED ON DYNAMIC RELATIVE GAIN

作　　者：张雪原[1] 颜湘武[1] 张波[1] 李佳佳[1] 吕志鹏[2] Zhang Xueyuan;Yan Xiangwu;Zhang Bo;Li Jiajia;Lyu Zhipeng(Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province North China Electric Power University,Baoding 071003,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]华北电力大学河北省分布式储能与微网重点实验室,保定071003 [2]中国电力科学研究院,北京100192

出　　处：《太阳能学报》2021年第7期110-117,共8页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展(863)计划(2015AA050603);国家电网公司科技项目(PD71-17-008)。

摘　　要：针对逆变器的功率耦合现象,理论分析逆变器功率耦合的根本原因,将控制论中的动态相对增益法应用于分布式发电系统中,提出一种全频域内量化评价逆变器功率耦合程度的方法,实现控制量参数和被控量参数的正确配对。基于对角形矩阵的功率解耦控制方法,改进传统的下垂控制策略,配合电压电流双闭环控制及前馈解耦,实现了逆变器输出有功功率、无功功率的独立控制。最后,具体算例验证了基于动态相对增益的功率耦合评价方法的合理性,仿真验证了基于对角形矩阵的功率解耦控制方法的可行性。In view of the inverter power coupling phenomenon,the root causes of inverter power coupling are analyzed theoretically,and the dynamic relative gain method in control theory is applied in the distributed power generation system,put forward a quantitative evaluation method of inverter power coupling degree in full frequency-domain,realized the correct pairing of the control parameters and the controlled parameters.Power decoupling control method based on diagonal matrix,improved the traditional droop control strategy,with voltage and current double closed-loop control and feedforward decoupling,realized the independent control of the inverter output active power and reactive power.Finally,the rationality of power coupling degree evaluation method based on dynamic relative gain was verified by a concrete example,and the feasibility of diagonal matrix power decoupling control method was verified by simulation experiment.This paper provides a theoretical reference and technical support for evaluation of power coupling and optimization for grid decoupling control.Finally,through concrete examples to verify the power coupling quantitative evaluation method based on dynamic relative gain.And the simulation experiment demonstrates the rationality of power decoupling control based on diagonal matrix method.

关 键 词：耦合 逆变器 相对增益 解耦控制 对角形矩阵 参数配对 下垂控制 

分 类 号：O325[理学—一般力学与力学基础] TK79[理学—力学]