REMOTE CRANKING OF STEAM ELECTRIC STATIONS

This paper is one of series presented on behalf of the System Operatio n Subcommittee with the intent of focusing industry attention on power system restoration. During the initial phase of restoration, black-st art combustion turbines are often considered as remote cranking source s for the start-up of steam electric stations. In general, remote cran king operation is carefully planned, simulated and then verified by fi eld tests. This paper describes the planning and simulation presently used in black-start of two coal-fired generating units utilizing remot e combustion turbines. It discusses a number of constraints which have to be considered and simulated in preparation for testing and verific ation. The paper concludes that, in order to minimize possibility of d amage to equipment during testing or actual restoration, it is necessa ry to undertake extensive simulation of the procedure. It recommends t hat the realistic generator reactive capability models be made a part of the network models to allow: optimum selections of tap positions fo r all the transformers within the remote cranking power system, thus p roviding adequate lead/lag reactive powers and to maintain acceptable voltage profile while proceeding through various stages of operation.