Voltage and reactive power regulation criteria with fuzzy boundaries

The application of voltage and reactive power regulation criteria with fuzzy boundaries in MCVQ-1 substation integrated control system is introduced. Compared with the traditional #-type criteria, the voltage factor is considered to reduce voltage fluctuation and regulating times. The operating experiences of 35-220kV substations in recent years are summarized. The substation voltage and reactive power integrated control using the regulation criteria with fuzzy boundaries lowers one-third of transformer tap regulating times,while the qualified voltage and optimal reactive power compensation are guaranteed.