| 大型光伏电站角形级联STATCOM电压控制策略 |
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| 引用本文： | 谢宁,陈晓科,徐晓刚,曾杰,张弛,楚烺.大型光伏电站角形级联STATCOM电压控制策略[J].电力自动化设备,2017,37(3). |
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| 作者姓名： | 谢宁 陈晓科 徐晓刚 曾杰 张弛 楚烺 |
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| 作者单位： | 广东电网有限责任公司电力科学研究院 广东省智能电网新技术企业重点实验室，广东 广州 510080,广东电网有限责任公司电力科学研究院 广东省智能电网新技术企业重点实验室，广东 广州 510080,广东电网有限责任公司电力科学研究院 广东省智能电网新技术企业重点实验室，广东 广州 510080,广东电网有限责任公司电力科学研究院 广东省智能电网新技术企业重点实验室，广东 广州 510080,广东电网有限责任公司电力科学研究院 广东省智能电网新技术企业重点实验室，广东 广州 510080,广州供电局有限公司，广东 广州 511450 |
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| 摘 要： | 大型光伏电站并网后,给配电网乃至输电网的电压、电能质量等带来一系列的影响。静止同步补偿器(STATCOM)可稳定公共连接点电压并提高分布式电源的低电压穿越能力。提出了一种适用于大型光伏电站角形级联STATCOM的电压控制策略,能够支撑电网正序电压,减少公共连接点电压波动,并抑制公共连接点负序电压,改善电网电压不平衡;再结合角形级联STATCOM相电流与线电压的约束关系,给出了角形级联STATCOM相电流指令获取方法;最后,在PSCAD中搭建仿真模型验证了所提控制方法的正确性和有效性。
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| 关 键 词： | 大型光伏电站 角形级联STATCOM 电压控制 不平衡电压 指令计算 零序环流 |
Voltage control strategy for delta-connected cascaded STATCOM of large-scale photovoltaic power station |
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| XIE Ning,CHEN Xiaoke,XU Xiaogang,ZENG Jie,ZHANG Chi and CHU Lang.Voltage control strategy for delta-connected cascaded STATCOM of large-scale photovoltaic power station[J].Electric Power Automation Equipment,2017,37(3). |
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| Authors: | XIE Ning CHEN Xiaoke XU Xiaogang ZENG Jie ZHANG Chi and CHU Lang |
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| Affiliation: | Key Laboratory of New Technology for the Smart Grid Enterprise of Guangdong Province, Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China,Key Laboratory of New Technology for the Smart Grid Enterprise of Guangdong Province, Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China,Key Laboratory of New Technology for the Smart Grid Enterprise of Guangdong Province, Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China,Key Laboratory of New Technology for the Smart Grid Enterprise of Guangdong Province, Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China,Key Laboratory of New Technology for the Smart Grid Enterprise of Guangdong Province, Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China and Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 511450, China |
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| Abstract: | The grid-connection of large-scale photovoltaic power station may impact the voltage/power quality of distribution/transmission network while STATCOM can stabilize the PCC(Point of Common Coupling) voltage and enhance the low-voltage ride-through ability of distributed generation. A voltage control strategy for delta-connected cascaded STATCOM of large-scale photovoltaic power station is proposed to support the positive-sequence voltage of grid, reduce the voltage fluctuation of PCC, suppress the negative-sequence voltage of PCC, and restrain the voltage imbalance of grid. Based on the constraint relation between the phase-current and line-voltage of STATCOM, a method for obtaining the phase-current instruction of delta-connected cascaded STATCOM is presented. The correctness and effectiveness of the proposed method are verified by PSCAD-based simulation. |
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| Keywords: | large-scale photovoltaic station delta-connected cascaded STATCOM voltage control unbalanced voltage instruction calculation zero-sequence circulating current |
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