Current-Injection Based Transmission Loss Allocation by Applying Shapley Value under a Deregulated Environment

• Main Authors: I-Hua Chung, 鍾易樺
• Other Authors: Shih-Chieh Hsieh
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/70080880131697664620

碩士 === 義守大學 === 電機工程學系 === 92 === As a trend of power industry deregulation in the world, transmission loss allocation will become an important issue for the upcoming competitive power market. The main reason is that the associated information can be utilized by the participants of a power market for their bidding strategies and negotiations, or can be used by market analysts as reference for improving economic efficiency. The difficulty for allocating transmission loss to each power generation company or a specific contract is because of highly nonlinear and non-separable properties of the loss function. So far, there is no strictly mathematical theorem based method can definitely determine the individual loss caused by each particular entity in the competitive power market. Thus, the fairness issue of loss allocation is still an open question. The thesis will utilize the normalized Shapley value and its simplified computing mode to investigate fair loss allocation schemes for a pool-based electricity market and a contractual power market. In a pool-based market, we will make use of the equivalent current injection to a generation bus to find its voltage contribution to each bus, while using the equivalent constant-impedance load models to modify the bus impedance matrix. According to the voltage contributions, we define a characteristic function and propose the Shapley Value to allocate the transmission losses. Meanwhile, some preliminary observations of the influence on bidding strategies were also presented. In a contractual market, we use the equivalent generation-load current injection pair model to calculating the voltage contribution of a specific contract on each bus, then we also define its characteristic function and use the normalized Shapley value to allocate the transmission losses. In addition to simplified computing version of Shapley value, we propose four reasonable approaches taking into account the charge for the generation bus (seller) and load bus (buyer), respectively, to speed up the computation process for on-line realization. A 6-bus power system and the IEEE 14-bus power system will be used for simulation and analysis.