A grid compatible methodology for reactive power compensation in renewable based distribution system

The penetration level of renewable based distributed generation (DG) has increased rapidly in recent years. Grid standards demand small DG units to operate with constant power factor control mode and large DG units with voltage control mode. As a result, small DG units are exposed to the problem of slow voltage recovery due to contingencies like fault. This paper proposes a new sensitivity index based methodology for placement of shunt reactive power compensators to support voltage at load bus and generator bus under steady state and transient conditions. Two different test systems with diverse network and load configurations have been used to test and verify the proposed methodology.