Interruptible Load Services for Congestion Relief

This paper addresses the issue of procurement of interruptible load services by the independent system operation for transmission congestion management. The Congestion Relief Model proposed in the paper is based on an optimal power flow framework which can be used for the real-time selection of interruptible load offers while satisfying the congestion management objective. The model can specifically identify buses where corrective measures need to be taken for relieving congestion over a particular congested line. It is shown that the scheme is very effective in handling system congestion. The interruptible load market proves to work efficiently. The CIGRE 32-Bus system is used for the case study