Post-fault Activation of Flexible Resources to Manage Regional Congestions Caused by a Contingency during a Planned Outage

Abstract

This paper focuses on regional and local outage planning of an electricity transmission system and presents a novel outage planning approach to solve grid congestions caused by a contingency during a planned outage in significantly surplus regions. The novel approach utilizes temporary admissible transmission loading as an enabler of a post-fault activation of flexible resources and minimizes the need to restrict the active power input into the transmission grid during a planned outage while still complying with the operational security limits. The paper presents suitable redispatching methods to implement the proposed approach, discusses its advantages and risks from three perspectives and compares it with the conventional approach. The proposed approach is expected to be more beneficial for the connected parties and the society, however, it may increase the risks and costs of a TSO compared with the conventional approach.