基于新型广义积分器的MMC-HVDC桥臂电流控制策略

发布时间：2018-05-08 16:58

本文选题：模块化多电平换流器 + 新型广义积分器　；参考：《中国电机工程学报》2017年22期

【摘要】：建立基于桥臂电流的模块化多电平变流器(modular multilevel converter,MMC)数学模型并给出桥臂电流参考值的计算公式。为同时实现MMC交流侧电流控制和环流抑制两个控制目标,提出三相静止坐标系下基于比例积分器(proportional integrator,PI)和两个正弦信号调节器并联结构的桥臂电流控制策略。该文提出一种新型广义积分器(novel generalized integrator,NGI),并从频域和时域的角度对NGI和准二阶广义积分器(quasi second order generalized integrator,QSOGI)进行深入对比分析。对比结果表明,相比于QSOGI,采用NGI作为电流控制器时,控制精度高,相位裕度大,暂态性能较好。仿真结果验证了所提控制策略在对称电网电压下和电网严重故障的情况下均具有良好的控制效果。
[Abstract]:The mathematical model of modular multilevel converter based on the bridge arm current is established and the formula for calculating the reference value of the bridge arm current is given. In order to realize the two control objectives of MMC AC side current control and current suppression simultaneously, a bridge arm current control strategy based on the parallel structure of proportional integrator and two sinusoidal signal regulators in three-phase stationary coordinate system is proposed. In this paper, a novel generalized integrator is proposed, and the NGI and quasi second order generalized integrator QSOGI are compared and analyzed in frequency domain and time domain. Compared with QSOGI, the control accuracy, phase margin and transient performance of NGI are higher than that of QSOGI. The simulation results show that the proposed control strategy has a good control effect under symmetrical network voltage and serious fault of power network.
【作者单位】：中国矿业大学(北京)机电与信息工程学院;直流输电技术国家重点实验室(南方电网科学研究院有限责任公司);北京四方继保自动化股份有限公司;
【分类号】：TM46

【相似文献】