DSTATCOM补偿不平衡负载分序控制策略  

Individual sequence control of DSTATCOM compensation for unbalanced load

作　　者：杨昆[1] 陈磊[1] 陈国柱[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力自动化设备》2012年第7期36-41,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177147);浙江省重点科技创新团队项目(2010R50021)~~

摘　　要：通过分析负载不平衡时各序等效电路,建立了配电网静止同步补偿器(DSTATCOM)在各序等效电路中的数学模型,并提出了分序控制策略。针对负载电流正、负序分量三相对称的特点,分别在正、负序同步旋转坐标系下进行补偿,而零序分量在三相坐标系进行补偿,为了提高补偿精度,同时抑制装置本身产生低次谐波和扰动,引入重复控制。最后在MATLAB/Simulink环境中搭建10 Mvar/10 kV DSTATCOM系统进行仿真验证,证明了新型控制策略补偿不平衡负载的有效性,并且具有一定抑制电网电压不平衡的能力。The equivalent circuit of each sequence is analyzed for unbalanced load,the mathematical model of DSTATCOM in each sequence is established and the individual sequence control is proposed. For the positive and negative sequence components of load current are symmetry in three phases,they are compensated in the synchronous rotating coordinates while the zero sequence component is compensated control is introduced to improve the compensation system of positive and negative sequence respectively, in the three-phase coordinates system. The repetitive accuracy and suppress the low-order harmonics and disturbances. A 10 Mvar/10 kV DSTATCOM simulation system is built in MATLAB/Simulink and the results show the effectiveness of the proposed control strategy of compensation for unbalanced load and its ability in the grid voltage imbalance suooression.

关 键 词：DSTATCOM 不平衡补偿 分序控制 重复控制 控制 数学模型 

分 类 号：TM761[电气工程—电力系统及自动化]