电气孤岛检测及其检测盲区的三维表示法

介绍了各种孤岛检测方法的原理和优缺点.检测盲区可以使用有功功率偏移量AP和无功功率偏移量△Q来描述,也可以使用负荷RLC参数来描述.使用品质因数Qf和谐振频率f0来描述检测盲区.当负荷的电流电压相位角与逆变器输出电流电压相位角相等时,负荷处于检测盲区.利用这一关系,定量的表示了检测盲区的大小,并且利用Matlab在二维...

Electrical Islanding Detection and Three-dimensional Representation of Its Non-detection Zone

The main principle of various islanding detection methods （IDMs） is introduced, and the merits and faults of these methods are also compared. There are many ways to describe the non - detection zone （NDZ） of IDMs, such as the AP - AQ space and the RLC parameter space, but the fo -Qf parameter space is used here. When the phase angle of local load equals to the phase angle of the inverter, the load is within the NDZ. Then the phase angle criterion can be used to quantify the size of NDZ. The fo - Qf eurves which are obtained by the Matlab intuitively show the NDZ of every method. The influenee of the design parameters of each IDM on the NDZ is analyzed finally.