| 光伏电站低电压穿越技术研究 |
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| 引用本文： | 施向前,耿乙文,黄尊臣,屈子森.光伏电站低电压穿越技术研究[J].电测与仪表,2015,52(8). |
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| 作者姓名： | 施向前 耿乙文 黄尊臣 屈子森 |
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| 作者单位： | 1. 中国矿业大学信息与电气工程学院,江苏徐州,221008
2. 中国矿业大学孙越崎学院,江苏徐州,221008 |
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| 基金项目： | “本科教学工程”国家级大学生创新创业训练计划 |
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| 摘 要： | 针对大规模光伏电站在电网故障或扰动时突然脱网造成的严重后果,提出了一种光伏电站低电压穿越(Low Voltage Ride Through,LVRT)控制策略,详细分析了基于正负序同步旋转坐标系的并网逆变器控制策略以及LVRT有功电流和无功电流协调控制的实现方法。以单相电压跌落故障为例,进行了仿真和实验研究,结果表明所提出的控制策略不仅能保证并网逆变器在电压跌落期间输出不过流,而且能够向电网发出一定的无功功率以支撑并网点电压的恢复,实现低电压穿越。
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| 关 键 词： | 光伏电站 低电压穿越 正负序同步旋转坐标系 协调控制 单相电压跌落故障 |
| 收稿时间： | 2014/4/10 0:00:00 |
| 修稿时间： | 2014/4/14 0:00:00 |
Research on Low Voltage Ride Through Technology for Grid-connected Photovoltaic Power Plant |
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| SHI Xiang-qian,GENG Yi-wen,HUANG Zun-chen and QU Zi-sen.Research on Low Voltage Ride Through Technology for Grid-connected Photovoltaic Power Plant[J].Electrical Measurement & Instrumentation,2015,52(8). |
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| Authors: | SHI Xiang-qian GENG Yi-wen HUANG Zun-chen and QU Zi-sen |
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| Affiliation: | China University of Mining and Technology,School of Information and Electrical Engineering,China University of Mining and Technology,School of Information and Electrical Engineering,China University of Mining and Technology, SUN Yue-qi Honors College,China University of Mining and Technology, SUN Yue-qi Honors College |
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| Abstract: | According to the serious consequences caused by large-scale photovoltaic power plant off the grid when grid failure or disturbance taking place, a control strategy based on low voltage ride through of photovoltaic power plant is proposed. The control strategy of photovoltaic grid-connected inverter and the implementation of coordinated control of active and reactive current are analysed detailedly. Then the simulation and experiment are carried out for the single-phase failure. The results verify that the proposed control strategy can ensure the grid-connected inverter output current flow doesn''t overcurrent during low voltage. At the same time, a certain amount of reactive power can be sent to the grid to support the recovery of grid voltage, so as to realize the capability of low voltage ride through. |
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| Keywords: | photovoltaic power plant low voltage ride through (LVRT) positive and negative sequence synchronous rotating coordinate coordination control single-phase voltage sag fault |
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