矿井链式静止同步补偿器电流跟踪控制策略
Current tracking control strategy for mine chain STATCOM
【索引】田旭,马越.矿井链式静止同步补偿器电流跟踪控制策略[J].工矿千亿国际app下载,2019,45(4):49-53.
【Reference】TIAN Xu,MA Yue.Current tracking control strategy for mine chain STATCOM[J].Industry and Mine Automation,2019,45(4):49-53.
【DOI】10.13272/j.issn.1671-251x.2018110002
【作者】田旭,马越
【Author】TIAN Xu,MA Yue
【作者机构】中国矿业大学(北京) 机电与信息工程学院, 北京100083
【Unit】School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
【摘要】针对弱电网条件下静止同步补偿器与电网间存在较强的相互影响,电网电压前馈控制策略因存在延时导致抗电网电压畸变效果不佳的问题,提出了一种考虑控制延时的矿井链式静止同步补偿器电流跟踪控制策略。该控制策略以传统的比例谐振控制策略为基础,在电网电压前馈环节中加入补偿环节,该补偿环节等于采样延时传递函数与控制延时传递函数乘积的倒数,采用麦克劳林展开式对补偿环节进行化简,可得到满足要求的补偿环节的近似表达式。加入补偿环节后的控制策略可以消除控制延时及电网电压畸变所造成的影响,使静止同步补偿器在电网电压谐波较大时仍可正常工作。仿真结果表明,该控制策略具有较强的抗电网电压扰动能力和良好的电流跟踪控制效果。
【Abstract】In view of problems of strong interaction effect between STATCOM and power grid under weak power, the power voltage feed-forward control strategy is not effective in resisting power grid voltage distortion due to the delay, a current tracking control strategy for mine chain STATCOM considering control delay was proposed. The control strategy is based on the traditional proportional resonance control strategy, and compensation link is added in power grid voltage feed-forward link. The compensation link is equal to reciprocal of product of sample delay and control delay transfer function. The approximation expression of compensation link available to meet the requirements is derived through McLaughlin expansion. The compensation strategy added compensation link can eliminate control delay and avoid influence of grid voltage distortion, so that the STATCOM can still work normally when power grid voltage harmonics are large. The simulation results show that the control strategy has strong ability to resist power grid voltage disturbance and good control effect of current tracking.
【关键词】 矿井链式静止同步补偿器; 电流跟踪; 控制延时; 电网电压补偿; 分相独立控制; STATCOM
【Keywords】mine chain static synchronous compensator; current tracking; control delay; power grid voltage compensation; phase independent control; STATCOM
【文献出处】工矿千亿国际app下载,2019年4期
【基金】国家自然科学基金项目(51707194);国家重点研发计划项目(2017YFB120080);北京市优秀人才培养资助项目(2016000020124G114)
【分类号】TD611
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