| 引用本文: | 程启明,江畅,王玉娇,马信乔.非理想条件下MMC-SAPF的Lyapunov函数控制策略[J].电力自动化设备,2020,40(8): |
| CHENG Qiming,JIANG Chang,WANG Yujiao,MA Xinqiao.Lyapunov function control strategy of MMC-SAPF under non-ideal conditions[J].Electric Power Automation Equipment,2020,40(8): |
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| 摘要: |
| 模块化多电平变流器(MMC)逐渐被应用于并联型有源滤波器(SAPF)。针对电力系统的非理想运行状态，提出了一种基于Lyapunov函数的正负序分离的控制策略，该控制策略可根据SAPF的容量灵活地选择补偿信号。首先根据MMC型SAPF(MMC-SAPF)的数学模型，建立经正负序分离后MMC-SAPF的Lyapunov函数控制器模型，选择最优控制增益；其次加入适用于电网非理想条件下的准比例谐振环流控制、电容电压控制器以提高系统性能；最后基于MATLAB/Simulink软件仿真平台和硬件实验平台，分别在理想、非理想条件下验证了所提Lyapunov函数控制策略对MMC-SAPF的有效性和优越性。仿真和实验结果表明所提Lyapunov函数控制策略能够快速、准确地补偿电流谐波，具有调节参数少、鲁棒性强、控制精度高等优点。 |
| 关键词: 非理想条件；换流器；MMC SAPF Lyapunov函数控制策略；正负序分离 |
| DOI：10.16081/j.epae.202008006 |
| 分类号:TM46;TN713 |
| 基金项目:国家自然科学基金资助项目(61573239)；上海市电站自动化技术重点实验室项目(13D0Z2273800) |
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| Lyapunov function control strategy of MMC-SAPF under non-ideal conditions |
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CHENG Qiming, JIANG Chang, WANG Yujiao, MA Xinqiao
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Shanghai Key Laboratory of Power Plant Automation Technology, School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
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| Abstract: |
| MMC(Modular Multilevel Converter) is gradually applied to SAPF(Shunt Active Power Filters). In view of the non-ideal operating state of power system, a control strategy with separation of positive sequence and negative sequence based on Lyapunov function is proposed, and the compensation signal can be selected flexibly according to the capacity of SAPF. Firstly, according to the mathematical model of MMC-SAPF, the Lyapunov function controller model of MMC-SAPF is established after the positive and negative sequence separation, and the optimal control gains are selected. Secondly, the quasi-proportional resonance circulation control and capacitor voltage control are added to improve the system performance under non-ideal conditions. Finally, based on the MATLAB/Simulink software simulation platform and hardware experimental platform, the effectiveness and superiority of the proposed Lyapunov function control strategy for MMC-SAPF are verified under ideal and non-ideal conditions. Simulative and experimental results show that the proposed Lyapunov function control strategy can quickly and accurately compensate the current harmonics, and has the advantages of less adjustment parameters, strong robustness as well as high control accuracy. |
| Key words: non-ideal conditions electric converters MMC SAPF Lyapunov function control strategy positive sequence and negative sequence separation |
