| 引用本文: | 张云贵,薛向荣,佟为民,于立业,薛杰荣.采用滑模变结构控制MPPT的三相光伏并网发电系统[J].电力自动化设备,2011,31(10): |
| ZHANG Yungui,XUE Xiangrong,TONG Weimin,YU Liye,XUE Jierong.Three-phase photovoltaic grid-connected power system with MPPT by sliding mode variable structure control[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 光伏并网发电系统的传统外环控制通过最大功率点跟踪（MPPT）算法给出直流母排参考电压，利用PI调节器调节输出并网有功参考电流。鉴于滑模变结构控制的快速响应和强鲁棒性，提出了一种基于滑模变结构控制的直接电流MPPT算法。在建立系统稳态模型的基础上，由MPPT控制算法直接给定并网有功参考电流。电流内环为LCL滤波三相电压型逆变器的并网电流、电容电流双环控制系统，在同步旋转坐标系下，分别对d、q轴电流进行解耦控制。仿真结果表明，所提出的滑模变结构控制策略正确有效，性能优良，光伏并网发电系统的输出能够快速稳定地跟踪阵列最大功率点，并实现单位功率因数运行，同时并网电流质量满足IEEE 929 — 2000标准要求。 |
| 关键词: 光伏电池 最大功率点跟踪 滑模控制 变结构控制 并网发电系统 控制系统 同步旋转坐标 |
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| Three-phase photovoltaic grid-connected power system with MPPT by sliding mode variable structure control |
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ZHANG Yungui1,2, XUE Xiangrong2, TONG Weimin1, YU Liye2, XUE Jierong2
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1.School of Electrical Engineering and Automation，Harbin Institute of Technology，Harbin 150001，China;2.State Key Lab of Hybrid Process Industry Automation System and Equipment Technology，Automation Research and Design Institute of Metallurgical Industry，Beijing 100071，China
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| Abstract: |
| The outer loop control of traditional PV（PhotoVoltaic） grid-connected power system offers the reference voltage for DC bus by MPPT（Maximum Power Point Tracking） algorithm and its PI controller regulates the active power current of grid-side. As the SMVSC（Sliding Mode Variable Structure Control） has fast response and strong robustness，the SMVSC-based direct current MPPT algorithm is proposed，which sets the grid-side reference active power current directly based on the steady-state model of system. The inner dual loop controls the grid-side current and the capacitor current of three-phase voltage-source inverter with LCL filter，which carries out the control of d and q reference currents respectively in the synchronous rotating coordinates. Simulative results show that，the proposed SMVSC has better performance and the output of grid-connected power system tracks the maximum power point of PV array quickly and stably with unity power factor，while the grid-side current quality meets the IEEE 929-2000 standard. |
| Key words: photovoltaic cells maximum power point tracking sliding mode control variable structure control grid-connected power system control systems synchronous rotating coordinates |
