Challenges faced and solutions for Network modelling and implementation of State Estimator at Northern Regional Load Despatch Centre, India

The rapidly changing world of Power System Operations requires advanced, flexible & adaptive software solutions to ensure seamless Transmission Network operations. Thus, suitable tools are used to monitor, assess the security, analyze and optimize the System operations. The tool present at Control Centres to realise above tasks is termed as Energy Management Systems (EMS). State Estimator (SE) forms the front end of EMS system.It is responsible for providing a complete, accurate, consistent and reliable real-time scenario for analysis, control, and optimization of the system. Realization of SE at a control centre monitoring a wide and complicated power system is challenging several times. Major challenges for SE to function consistently are modelling of equipment, equipment operating modes, trade-off between telemetry and network expansion to include parallel network at lower transmission voltages, location of measurement in actual system vrs its location in the EMS model etc. This paper gives details of those challenges faced and their solutions during in course of implementation of EMS in Northern Regional Control Centre of India.