Development of an interactive rule-based system for bulk power system restoration

This paper presents a rule-based system to generate and implement a dynamic restoration plan for a partial or total blackout in a bulk power system. The governor response and ramp rate of each generator, system load regulation, pick-up characteristic of individual load and the transmission network are modeled. If the differences between the telemetry data and the calculated system frequency or the calculated total generation at each power station exceed the specified tolerance, the restoration plan will be updated and adjusted accordingly. The complete load flow calculation is conducted at every minute and the voltage and reactive power flow is controlled. Various cases in a prototype system are tested and encouraging results are obtained. The developed restoration system can provide a complete restoration plan within a very short time and it can also dynamically generate a new restoration plan as and when required.