不对称电压暂降下最大功率输出的MMC协调控制策略

doi:10.11930/j.issn.1004-9649.202206102

中国电力 ›› 2022, Vol. 55 ›› Issue (12): 160-167.DOI: 10.11930/j.issn.1004-9649.202206102

不对称电压暂降下最大功率输出的MMC协调控制策略

贺烨丹¹, 夏向阳¹, 尹旭², 邓文华³, 王灿³, 熊富强², 周晗靓¹

1. 长沙理工大学电气与信息工程学院，湖南长沙 410014;
2. 国网湖南省电力有限公司检修公司，湖南长沙 410007;
3. 湖南长高高压开关集团股份公司，湖南长沙 410219

收稿日期:2022-06-23 修回日期:2022-11-01 发布日期:2022-12-28
作者简介:贺烨丹（1998—），女，硕士研究生，从事柔性直流输电控制技术研究，E-mail：1078070457@qq.com;夏向阳（1968—），男，通信作者，博士，教授，从事柔性直流输电控制和储能安全控制研究，E-mail：307351045@qq.com
基金资助:
国家自然科学基金资助项目（柔性直流输电交流侧故障下换流器多桥臂主动应对的能量调控机理及穿越控制研究，51977014）。

MMC Coordinated Control Strategy for Maximum Power Output Under Asymmetric Voltage Sag

HE Yedan¹, XIA Xiangyang¹, YIN Xu², DENG Wenhua³, WANG Can³, XIONG Fuqiang², ZHOU Hanliang¹

1. College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410014, China;
2. Maintenance Company of State Grid Hunan Electric Power Co., Ltd., Changsha 410007, China;
3. Hunan Changgao High Voltage Switchgear Group Co., Ltd., Changsha 410219, China

Received:2022-06-23 Revised:2022-11-01 Published:2022-12-28
Supported by:
This work is supported by National Natural Science Foundation of China (Research on Energy Regulation Mechanism and Fault Ride-through Control of Multi-armed Converter of AC Side Fault in MMC-HVDC System, No.51977014).

摘要/Abstract

摘要： 针对柔性直流输电系统交流侧不对称电压暂降下，模块化多电平换流器（modular multilevel converter，MMC）运行时出现的功率波动、三相电流不平衡等问题，提出了不对称电压暂降下最大功率输出的MMC协调控制策略。该策略根据不对称电压暂降下MMC系统运行特性随调节参数的变化规律，以抑制有功功率波动与输出三相平衡电流的协调控制为目标，构建了线性加权解析式确定调节参数，在保证MMC输出电流峰值在最大限制范围内时，输出最大有功功率。该策略既拓展了有功功率输出能力，又提升了系统的整体控制保护性能。仿真和实验结果验证了所提方法的有效性。

关键词: 不对称电压暂降, 模块化多电平换流器, 协调控制, 电流峰值, 最大有功功率

Abstract: Aiming at the problems of asymmetric voltage sag on the AC side of flexible DC transmission system, such as the power fluctuation and three-phase current imbalance during the operation of modular multilevel converter (MMC), a MMC coordinated control strategy for maximum power output under asymmetric voltage sag is proposed in this paper. Taking the coordinated control of suppressing the fluctuation of active power and outputting the three-phase balance current as objective, a linear weighted analytical formula is constructed to determine the regulation parameters according to the variation law of the operation characteristics of MMC system with the regulation parameters under asymmetric voltage sag, and then the maximum active power is outputted while ensuring that the outputted peak current of MMC system is within the maximum allowable working range; The proposed strategy not only expands the active power output capacity, but also improves the overall control and protection performance of the system. Finally, the effectiveness of the proposed method is verified through simulation and experiment.

Key words: asymmetric voltage sag, modular multilevel converter, coordinated control, peak current, maximum active power

贺烨丹, 夏向阳, 尹旭, 邓文华, 王灿, 熊富强, 周晗靓. 不对称电压暂降下最大功率输出的MMC协调控制策略[J]. 中国电力, 2022, 55(12): 160-167.

HE Yedan, XIA Xiangyang, YIN Xu, DENG Wenhua, WANG Can, XIONG Fuqiang, ZHOU Hanliang. MMC Coordinated Control Strategy for Maximum Power Output Under Asymmetric Voltage Sag[J]. Electric Power, 2022, 55(12): 160-167.

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不对称电压暂降下最大功率输出的MMC协调控制策略

MMC Coordinated Control Strategy for Maximum Power Output Under Asymmetric Voltage Sag

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不对称电压暂降下最大功率输出的MMC协调控制策略

MMC Coordinated Control Strategy for Maximum Power Output Under Asymmetric Voltage Sag

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