Over-voltage Problem in Distribution Network with DG: A Review of Mitigation Techniques

The considerable penetration of distributed generation (DG) in the distribution network (DN) invalidates the premises upon which distribution networks are designed. This penetration has resulted in a number of issues in the DN, the leading being voltage rise problem which occurs whenever generation is higher than the demand on the network thereby causing the power to flow in the reverse direction and subsequently leading to overvoltage. Many techniques discussed in the literature to mitigate this issue range from network reconfiguration to active management of the DN. This paper highlights the problem of overvoltage in DN with high penetration of DG and presents a technical overview of approaches to curtail the problem. IPSA software is then employed to model the effects of voltage control in low voltage distribution network.