Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms
Considering asymmetric bridge arms of modular multilevel converter (MMC), a passivity-based PI control method based on the bilinear model is proposed to address the dq decoupling transformation errors caused by the fundamental frequency component asymmetry of circulating currents,, which can achieve...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
State Grid Energy Research Institute
2023-07-01
|
| Series: | Zhongguo dianli |
| Subjects: | |
| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202211082 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850037510347948032 |
|---|---|
| author | Cheng CHEN Hua XUE Zenghui HU Yufei WANG |
| author_facet | Cheng CHEN Hua XUE Zenghui HU Yufei WANG |
| author_sort | Cheng CHEN |
| collection | DOAJ |
| description | Considering asymmetric bridge arms of modular multilevel converter (MMC), a passivity-based PI control method based on the bilinear model is proposed to address the dq decoupling transformation errors caused by the fundamental frequency component asymmetry of circulating currents,, which can achieve stable fault phase capacitor voltage, accurate suppression of asymmetric circulating current components and balanced output of three-phase grid-connected currents. Firstly the MMC bilinear model under the condition of asymmetric bridge arm is established in the abc coordinate. Then the linear transformation of the nonlinear system is conducted, in which the control variables are adjusted synchronously with the state variables. In this way the controller design is simplified and the control errors introduced by the dq decoupling transformation are diminished. Based on the global energy dissipation characteristics of the system, a simple passivity-based PI controller is designed to quickly suppress the sub-module capacitor voltage ripple, eliminate the current asymmetry of the bridge arm, and hence ensure the global asymptotically stable operation of the closed-loop control system. The simulation results based on MATLAB has verified that the proposed control method can effectively suppress the adverse effects from the asymmetric bridge arm, and exhibits its capability of fast response, strong stability and high robustness. |
| format | Article |
| id | doaj-art-44156561462b4e6d8cd7ebd05e366d01 |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2023-07-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-44156561462b4e6d8cd7ebd05e366d012025-08-20T02:56:51ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492023-07-0156710711610.11930/j.issn.1004-9649.202211082zgdl-56-06-chenchengPassivity-Based PI Control Method of MMC with Asymmetric Bridge ArmsCheng CHEN0Hua XUE1Zenghui HU2Yufei WANG3Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, ChinaElectric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, ChinaChina Mobile Communications Group Shandong Co., Ltd., Jining Branch, Jining 272000, ChinaElectric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, ChinaConsidering asymmetric bridge arms of modular multilevel converter (MMC), a passivity-based PI control method based on the bilinear model is proposed to address the dq decoupling transformation errors caused by the fundamental frequency component asymmetry of circulating currents,, which can achieve stable fault phase capacitor voltage, accurate suppression of asymmetric circulating current components and balanced output of three-phase grid-connected currents. Firstly the MMC bilinear model under the condition of asymmetric bridge arm is established in the abc coordinate. Then the linear transformation of the nonlinear system is conducted, in which the control variables are adjusted synchronously with the state variables. In this way the controller design is simplified and the control errors introduced by the dq decoupling transformation are diminished. Based on the global energy dissipation characteristics of the system, a simple passivity-based PI controller is designed to quickly suppress the sub-module capacitor voltage ripple, eliminate the current asymmetry of the bridge arm, and hence ensure the global asymptotically stable operation of the closed-loop control system. The simulation results based on MATLAB has verified that the proposed control method can effectively suppress the adverse effects from the asymmetric bridge arm, and exhibits its capability of fast response, strong stability and high robustness.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202211082modular multilevel converter (mmc)asymmetric bridge armpassivity-based pi controlbilinear model |
| spellingShingle | Cheng CHEN Hua XUE Zenghui HU Yufei WANG Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms Zhongguo dianli modular multilevel converter (mmc) asymmetric bridge arm passivity-based pi control bilinear model |
| title | Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms |
| title_full | Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms |
| title_fullStr | Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms |
| title_full_unstemmed | Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms |
| title_short | Passivity-Based PI Control Method of MMC with Asymmetric Bridge Arms |
| title_sort | passivity based pi control method of mmc with asymmetric bridge arms |
| topic | modular multilevel converter (mmc) asymmetric bridge arm passivity-based pi control bilinear model |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202211082 |
| work_keys_str_mv | AT chengchen passivitybasedpicontrolmethodofmmcwithasymmetricbridgearms AT huaxue passivitybasedpicontrolmethodofmmcwithasymmetricbridgearms AT zenghuihu passivitybasedpicontrolmethodofmmcwithasymmetricbridgearms AT yufeiwang passivitybasedpicontrolmethodofmmcwithasymmetricbridgearms |