Operational experiences in managing contingencies at Western Regional Load Despatch Centre of India

The Western Regional Load Dispatch Centre (WRLDC) has been successful in implementing the Power Network Analysis (PNA) sub-system of the Energy Management System (EMS) package supplied by M/s.GE after proper tuning of State Estimator(SE) to ensure that the SE output is suitable for use in real time grid operation. Usage of Contingency Analysis (CA) in real time operation aids in better situational awareness and helps in taking immediate remedial measures for ensuring grid security. The Contingency Analysis (CA) application of the PNA sub-system has already been utilized in developing a lookup table for emergency measures during credible contingencies in the region. The CA is also successfully used in real time grid operation for better contingency evaluation and faster response. The paper describes the CA module available with EMS package at WRLDC and explaining in detail the manner in which contingency management is done using offline and real time EMS tools. The paper also discusses a method of ranking the corrective actions using impact based and risk based assessments.