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首页> 外文期刊>IEEE Transactions on Energy Conversion >Automatic phase-shift method for islanding detection of grid-connected photovoltaic inverters
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Automatic phase-shift method for islanding detection of grid-connected photovoltaic inverters

机译:光伏并网逆变器孤岛检测的自动相移方法

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摘要

The traditional frequency-shift methods for islanding detection of grid-connected PV inverters-the active frequency drift method and the slip-mode frequency-shift method-become ineffective under certain paralleled RLC loads. The automatic phase-shift method is proposed in this paper to alleviate this problem. The method is based on the phase shift of the sinusoidal inverter output current. When the utility malfunctions, the phase-shift algorithm keeps the frequency of the inverter terminal voltage deviating until the protection circuit is triggered. Simulation and experiments are performed for verification.
机译:在某些并联的RLC负载下,用于并网光伏逆变器的孤岛检测的传统移频方法(主动移频方法和滑模移频方法)变得无效。本文提出了一种自动相移方法来缓解这一问题。该方法基于正弦逆变器输出电流的相移。当市电发生故障时,相移算法将使逆变器端子电压的频率保持偏差,直到触发保护电路。进行仿真和实验以进行验证。

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