微网故障穿越综合控制  

The integrated control of fault ride-through for micro-grid

作　　者：周雪莹[1] 朱兰[1] 李彦林[2] 

机构地区：[1]上海电力学院电气工程学院,上海200090 [2]哈尔滨工业大学电气工程及其自动化学院,哈尔滨150001

出　　处：《电测与仪表》2017年第11期43-48,共6页Electrical Measurement & Instrumentation

基　　金：上海绿色能源并网工程技术研究中心资助项目(13DZ2251900)

摘　　要：配电网故障(电压跌落、骤升、不平衡、谐波)影响微网的正常运行,严重时会损坏微网设备,为克服电网故障影响,从提高微电源自身抗扰能力和补偿电网故障电压两方面提出微网故障穿越综合控制策略,采用基于谐振控制的新型PQ控制策略抑制电网故障对微电源的影响。同时,提出基于多谐振控制VQR的微网故障穿越控制策略,在配电网故障指标超过规定值时,VQR对电网电压跌落、不平衡、谐波进行补偿,使微网电压保持正常,仿真结果表明所提出的综合控制策略提高了微网故障穿越能力。Distribution grid faults, such as voltage sags, swells, unbalance, and harmonic, influence the normal operation of micro-grid, and even generate accident of equipment in micro-grid. To overcome the above influence, the integrated control strategy of fault ride-through for micro-grid was proposed from two aspects, which included disturbance rejection of micro sources and grid voltage faults compensation. Based on resonant control, a novel PQ control strategy is used to suppress influences of grid faults on micro sources. Meanwhile, a control strategy, which uses four legs VQR, based on multi-resonant control, is proposed to improve fault ride through capability of micro-grid. The fault behavior of grids, such as voltage sags, unbalance, harmonics, is compensated by VQR during grid faults. The simulation results show that proposed integrated control strategies can improve FRT performance of micro-grid.

关 键 词：故障穿越 微网 多谐振控制 电压质量调节器(VQR) 

分 类 号：TM933[电气工程—电力电子与电力传动]