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Decision Analysis Model to Determine the Appropriate Level of Protection for the Small Power Producer/Utility Interconnection

机译:确定小功率生产者/公用事业互联的适当保护水平的决策分析模型

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This paper formulates a methodology to aid in deciding on the appropriate quality and quantity of protection equipment for a small electric power producer, known in the industry as dispersed storage and generation (DSG), connected on an electric distribution feeder. The decision involves determining whether the benefits (reduced risk of equipment damage and safety hazards) due to additional and/or more reliable relay and circuit breaker components for a protection scheme outweigh the incremental increase in the costs (capital, installation, and maintenance) of the added protection. This methodology is useful to electric utilities, small power producers, and regulatory bodies who must make decisions regarding the technical adequacy as well as the cost-effectiveness of protection requirements for DSG installations. A discrete state-space representation is used to model the response of the DSG and utility protection equipment at and near the DSG/utility interconnection to shunt faults (short circuits) and series faults (open circuits) on a distribution feeder. The probability of the transitions between each of the operating states is a function of the type of fault, its probability of occurrence, its duration, the response of the feeder line protection to the fault, and the response of the DSG protection scheme. (ERA citation 10:048883)

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