In practice a compensator such as a bank of capacitors (or inductors) can be divided into parallel sections, each switched separately, so that discrete changes in the compensating reactive power may be made, according to the requirements of the load. To address voltage stability challenges in power grids with high penetration of distributed generation (DG), this paper proposes an optimal configuration method for reactive power compensation devices. Voltage-weak nodes are first identified using a novel short-circuit ratio (SCR) index. GRIDCON® STATCOM systems are based. Ensto has extensive experience in providing turnkey solutions for compensation of reactive power to underground cable networks, covering everything from needs assessment to commissioning and maintenance. The need for reactive power compensation has increased due to the rise in medium voltage. Integrated distribution box is applicable to urban and rural power distribution systems with AC 50Hz, rated voltage 400V and rated current up to 600A, serving for power distribution, control, compensation and protection of power, lighting and distribution equipment. Reactive power variations have an effect on the generating systems, lines, circuit-breakers, transformers, relays and isolators. Due to this there is an effective.