Power system network modeling for on-line analysis

On-line power system analysis enables to make power mode-related decision based on information available at real time. The quality of the studies and efficiency of power system operation are closely associated with the accuracy of the power system models. Accurate and quick decision based on analysis on real time data has been necessary for making operational plan under the deregulation of power system world wide. In addition there has been phenomenal expansion of power system in India in recent times especially after introduction of Electricity Act 2003, introduction of open access and emergence of power markets through power exchanges have brought complexities in power system operation and control. Power network analysis on real time data is expected to further enhance the critical role in grid operation after proposed regulations for fixing the transmission tariff and loss apportionment. All these have necessitated power system analysis on real time conditions very accurate but based on diverse principle. In order to meet all requirements ranging from monitoring, commercial, reliability and stability angle, an attempt has been made to adopt hybrid nature of network model in real time supervisory control and data acquisition (SCADA) system which has till date works on an integrated single network model. In this paper it is proposed for a theoretical basis of network modeling and the same is adapted in southern regional load despatch center (SRLDC) Bangalore India and analysis using energy management system (EMS) tools for the real time system. It has been shown how a systematic planning can make on-line network modeling and analysis relatively simple under complex operational requirement. Experimental results show that adaptation of on-line power management strategies can be a key tool in the hands of control engineers in the complex power system operation scenario.