Voltage stabilization after faults in the IEEE standard ۱۴-bus Power System by using Photovoltaic system and Inverter by active power compensation method

Sending and receiving stable electrical energy in power grids requires constant stability and maintaining grid synchronization. The main reason for the dynamics of systems is the energy storage elements (inductor and capacitor). Control systems are used to deal with some unwanted dynamic phenomena.Control systems in power plants include governor and automatic voltage control (AVR) and several control systems in power grids such as static Var compensation (SVC) which is a FACTS۱ device and Power System Stabilizers (PSSs). Factors such as changes in generator output power due to load changes,types of short circuits in transmission lines (for example, two-phase or three-phase short-circuits, singlephase or two-phase short-circuits, etc.), can change the conditions in the grid and cause changes in voltage or frequency, and ultimately instability in the grid. In this paper, we intend to dampen the instabilities that may occur in the voltage after these errors occur in an IEEE standard ۱۴-bus system. To achieve this, we will use a photovoltaic system and a battery as a stabilizer to inject or receive active power so that after creating disturbances, the voltage returns to its original state and the grid does not lose its voltage stability. On the grid side (AC Loads), we will control the voltage of the grid by PI controllers by the inverter. The results show that the proposed system operates successfully and ensures voltage stability.

Keywords:

Voltage stability , Active power controller , Inverter , FACTS devices , Synchronous generator.