Design of voltage stability monitoring simulation system for PV grid-connected system

Abstract

Abstract Voltage stability monitoring simulation system for photovoltaic (PV) grid-connected system is designed, taking the classic three-node power system model with a PV power station for example. The voltage instability theory and application researches for the monitoring simulation system are carried, and the frame, communication protocol and software functions of the voltage stability monitoring system are discussed. The monitoring simulation system can realize two-computer communication and joint debugging, which can not only monitor the basic operational aspects, but also be used to view the voltage equilibrium point curves and voltage response curves as the operating point is affected by various disturbances. And the system load margin index calculation, load shedding and other voltage stability remote control methods are provided to maintain or improve voltage stability. The monitoring simulation system provides a reference scheme for the application of voltage stability theory in practical engineering.