抄録
The electric power markets have been liberated partially and the liberation will be promoted continuously. On the other hand, refuse-fired generating systems (RGS) are constructed in many municipal corporations as on-sight power sources. This paper discussed the operation of a RGS which could transfer its excess energy to consumers through the electricity wheeling service of the electric utility. The RGS is operated by the dynamic programming method under the constraints of the RGS operation and the electricity wheeling service. In the DP method, the estimation function is the annual total electricity charge of both of the RGS and the consumers, and the control variable is the residual amount in the refuse pit. A university, a hospital, a welfare apartment house and their combinations are selected as consumers. The main results obtained are as follows: (1) the electricity wheeling service is more economical than the no electricity wheeling service when the annual demand of the consumer is higher than 70% of the excess energy of RGS, (2) it is more economical as the load factor increases if the annual demand is same, (3) the most economical consumer is the combination of four hospitals and five welfare apartment houses, and its total electricity charge can be reduced to 84% of with no wheeling service. It is concluded that the total electricity charge of the RGS with electricity wheeling service could be decreased considerably by selecting the consumer appropriately.
