| 引用本文: | 叶剑桥,周建萍,茅大钧,葛祥一,张健,方乐.基于无源滑模和滑模PI的UPQC-PV控制策略[J].电力自动化设备,2021,41(1): |
| YE Jianqiao,ZHOU Jianping,MAO Dajun,GE Xiangyi,ZHANG Jian,FANG Le.Control strategy of UPQC-PV based on passive sliding mode and sliding mode PI[J].Electric Power Automation Equipment,2021,41(1): |
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| 摘要: |
| 针对传统控制方法使集成光伏式统一电能质量调节器(UPQC-PV)存在补偿效率和精确性较低、直流侧电压易受外界干扰等问题，提出了针对UPQC-PV的无源滑模控制和滑模PI直流侧控制策略。首先，基于统一电能质量调节器的数学模型，设计了基于欧拉-拉格朗日模型的正负序无源滑模控制器，解决无源控制抗干扰能力弱的问题，提高了系统的响应速度、补偿精度、抗干扰能力；然后，采用滑模PI控制降低光伏波动对系统的影响，稳定系统直流侧电压，从而进一步改善系统的整体性能；最后，在电网不平衡、负载突变、负载不平衡、光照强度改变等状态下，通过仿真和实验验证了所提无源滑模控制和滑模PI直流侧控制策略的优越性、有效性。 |
| 关键词: UPQC-PV 无源滑模控制 滑模PI控制 正负序分离 电能质量 |
| DOI：10.16081/j.epae.202012024 |
| 分类号:TM615;TM571.2 |
| 基金项目:国家自然科学基金资助项目(61275038)；上海市“科技创新行动计划”地方院校能力建设专项(19020500700) |
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| Control strategy of UPQC-PV based on passive sliding mode and sliding mode PI |
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YE Jianqiao, ZHOU Jianping, MAO Dajun, GE Xiangyi, ZHANG Jian, FANG Le
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College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
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| Abstract: |
| The UPQC-PV(Unified Power Quality Conditioner integrated with PhotoVoltaic) based on the tradi-tional control methods has low compensation efficiency and accuracy, and the DC-side voltage is vulnerable to external interference, so a passive sliding mode and sliding mode PI control-based DC-side control strategy is proposed for UPQC-PV. Firstly, based on the mathematical model of unified power quality conditioner, the positive and negative sequence passive sliding mode controller based on Euler-Lagrange model is de-signed to solve the passive control’s problem of weak anti-interference ability, which improves the system response speed, compensation accuracy and anti-interference ability. Then, the sliding mode PI control is adopted to reduce the influence of photovoltaic fluctuation on the system, stabilize the DC-side voltage of the system, and further improve the overall performance of the system. Finally, the superiority and effectiveness of the proposed DC-side control strategy are verified by simulation and experiment under the conditions of power grid imbalance, sudden load change, load imbalance, light intensity change, and so on. |
| Key words: UPQC-PV passive sliding mode control sliding mode PI control positive and negative sequence separation power quality |
