VOLTAGE STABILITY ANALYSIS OF A MICRO GRID

This Paper presents Voltage Stability Analysis of a microgrid connected to PV, Wind and Battery Storage system. Voltage stability analysis of a power system is a very important, particularly in the planning phase of the development or expansion of a power network. In the trans-Mission level, each transmission line has a certain power transfer capability limit. Exceeding such a limit leads to incidences such as outage of a transmission line, losing Generation units, and the possibility of customers losing their power supply. When such scenarios occur, and when these instability events lead to more cascaded outages as well as losing generation and loads, a voltage collapse may be in place. The main reason for the instability of the voltage or voltage collapse is the load. Either sudden Loosing of major loads or restoring such amount can cause voltage instability problems either over-voltages or under- voltages. Since stability phenomena always link with time Frame, it is expected to have time classification of voltage stability. A micro-grid is normally composed of relatively small-distributed generators supplying an islanded distribution network. Although a micro-grid may not be a complex interconnected power system similar to a transmission network, but it has some characteristics that makes it undergo instability problems when it is exposed to disturbances. The standard 9 Bus microgrid available in IEEE papers will be developed and simulated in the project considering Different cases by using the Stability Indices such as VCPI, VSI and PTSI. Voltage stability assessment will be carried out in PSAT software. The different solution for voltage stability may be suggested and simulated in the project.