基于自恢复型下垂控制的微电网运行控制策略研究  

RESEARCH ON MICROGRID OPERATION CONTROL STRATEGY BASED ON SELF-RECOVERY DROOP CONTROL

作　　者：田春胜 任永峰 胡志帅 孟庆天 陈建 张艳锋 Tian Chunsheng;Ren Yongfeng;Hu Zhishuai;Meng Qingtian;Chen Jian;Zhang Yanfeng(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010080,China;China Resources Power Investment Co.,Ltd.,Taiyuan 030006,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010080 [2]华润电力投资有限公司山西分公司,太原030006

出　　处：《太阳能学报》2024年第8期71-77,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(52367022,51967016);内蒙古自治区重点研发和成果转化项目(2023YFHH0077);内蒙古自治区科技创新重大示范工程“揭榜挂帅”项目(2023JBGS0013)。

摘　　要：针对微电网并、离网模式切换、微电源突变以及负荷扰动导致的系统频率和电压波动问题,提出频率、电压自恢复型下垂控制策略。首先,基于传统下垂控制引入频率差和电压差作为反馈环节,建立储能单元自恢复型下垂控制模型。其次,通过伯德图对自恢复型和传统型下垂控制系数在不同频段范围内的性能进行对比分析。自恢复型下垂控制因采用PI控制和引入修正下垂系数因子使系统具备较好的频率和电压自恢复效果,提升动态调整能力,表现出较好的适应性。最后,基于Matlab/Simulink平台建立35 kV风光储微电网模型,通过时域仿真实验验证自恢复型下垂控制策略的有效性。For the problem of system frequency and voltage fluctuations caused by the switching of grid-connected and off-grid modes,the mutation of micro-source and the disturbance of load conditions,the self-recovery droop control strategy of frequency and voltage is proposed.Firstly,the self-recovery droop control model of energy storage unit is established based on the traditional droop control by introducing frequency difference and voltage difference as feedback links.Secondly,the performance of self-recovery and traditional droop control coefficients are compared and analyzed in different frequency bands by Bode diagram.The self-recovery droop control has better effect of system frequency and voltage self-recovery due to the adopting of PI control and the introduction of correction droop coefficient factors,which improves the dynamic adjustment capability and shows better adaptability.Finally,a 35 kV wind-solar-storage microgrid model is established based on Matlab/Simulink,and the effectiveness of the self-recovery droop control strategy is verified by time-domain simulation experiments.

关 键 词：微电网 并、离网 自恢复型下垂控制 伯德图 风光储 

分 类 号：TM464[电气工程—电器]