三相光伏并网逆变器状态空间模型与矢量控制The State Space Model and Vector Control of Three-phase Photovoltaic Grid-connected Inverter
陈晓云,马瑞军
摘要(Abstract)：
随着分布式发电的发展,分布式发电系统成为旋转设备发电机和逆变器接口发电机构成的混合电力系统.系统稳定性分析需要研究状态空间模型,以及合适的逆变器模型,从而对已经成熟的旋转电机模型进行必要的补充.电机模型包括自动电压控制器AVR(automatic voltage regulator)和功率补偿功能,逆变器模型包括锁相环功能和内部控制功能等.基于三相光伏并网电压源型逆变器模型,进一步分析内部电流控制环,外部功率控制环,平均功率测量以及PLL技术.所有模型采用状态向量技术进行详细推导,类似于旋转电机的数学模型分析.模型包含非线性项,但能在运行点上线性化,基于MATLAB SIMULINK/PLECS仿真平台,对状态空间模型的并网系统进行数字仿真,仿真结果表明基于状态空间的数学模型和空间矢量控制,能有效改善并网电流的电能质量,实现并网要求.
关键词(KeyWords)： 光伏;并网;逆变器;状态空间;矢量控制
基金项目(Foundation): 新疆维吾尔自治区科技厅“配电网智能补偿装置D-statcom的研发”(201213133)
作者(Author): 陈晓云,马瑞军
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