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This paper introduces the concept of a new framework for power system restoration. Its objective is to minimize the large number of time-domain simulations that is usually necessary in order t o find a suitable restoration sequence. T h e new method is based o n rules that deal with specific problems encountered during restoration and that are formulated an the frequency and Laplace domain. Once a suitable restoration sequence is found, it can be verified by a single set of time-domain simulations. As a n example for a specific rule, the assessment of motor starts during a n emergency and black start procedure for thermal power plants is investigated. Simple analytical rules are developed that help to predict motor start-up times, currents, and voltage drops. T h e validity of the results is confirmed by time-simulations carried out with the Electromagnetic Transients Program ( EMTP) . 0-7803-5957-7/00/$10.00 0 2000 IEEE 153

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