In photovoltaic grid-connected generation systems, whether the condition of islanding can be detected effectively and timely or not is of great significant for the entire grid-connected system.
在太阳能并网发电系统中，如何有效、及时地检测孤岛效应对整个并网系统具有重要的意义。
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This paper analyzed the topology of grid-connected system, conversation of energy, maximum Power Point tracing (MPPT), control strategy, islanding effect of grid-connected system.