| 基于遗传算法的动态电压恢复器不对称暂降补偿方法 |
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| 引用本文：魏小淤,杨洪耕.基于遗传算法的动态电压恢复器不对称暂降补偿方法[J].电网与清洁能源,2010,26(4):29~32 |
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| 基金项目:国家自然科学基金项目（50677041） |
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| 中文摘要:电压暂降作为一种电能质量问题，由于不对称故障的存在，使处理不对称电压暂降变得复杂。电压暂降除了幅值减小外，还往往伴随着相角跳变，这样更增加了补偿难度。电压暂降发生幅值不对称和相角不对称，都对电子变流设备有着严重的影响，因此需要将负荷电压的幅值恢复到容忍范围，同时保持三相电网电压对称。由于动态电压恢复器(DVR)受最大注入电压限制，需要建立一种方法使DVR的各相注入电压得到有效控制。针对动态电压恢复器（DVR）补偿电压约束下，不对称故障电压补偿，采用遗传算法对其注入电压实施控制，并以算例说明该方法的有效性。 |
| 中文关键词:电压暂降 不对称故障 补偿电压约束 遗传算法 |
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| A Method for Dynamic Voltage Restorer Compensating Unbalanced Voltage Sags Based on Genetic Algorithm |
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| Abstract:Voltage sag is a crucial power quality problem. Due to the unbalance fault present in occurrence of sags, it is more complicated to deal with the unbalanced voltage sag. Voltage sag not only causes drop of voltage magnitude, but also results in sudden changes of the phase angle, hence the difficulty of compensation is further increased. The unbalanced magnitude and phase angle attributed to voltage sags have severe impacts on the power electronic converter, therefore, the magnitude of the load voltage should be restored to the required level and the symmetry between voltages on the three phases should be maintained. As the dynamic voltage restorer (DVR) is subjected to the maximum voltage injection constraint, a method should be established so that the voltage injection on the three phases can be controlled effectively. Genetic Algorithm(GA) is used to find out the optimum configuration for various unbalanced voltage sags with phase-jumps. Numerical examples are included to illustrate the validity of the proposed algorithm. |
| keywords:voltage sag unbalance faults restriction of com-pensation voltage genetic algorithm |
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