A new two-step matching method and loss-allocation method based on the profit proportional sharing principle applied in the trans-regional transaction

This paper is initial on the model of Trans-regional centralized transaction focusing on the matching method and loss allocation. Firstly, to build the Trans-regional centralized multilateral matchmaking transaction, the two-step network flow optimization model is put forward, basing on the theory of network flow. The optimization models take maximum social welfare as the objective, while considering the transmission channel capacity and transmission loss constraints. With the first-step network flow optimization model, the sets of transaction suppliers and consumers are decided, as well as the transaction amounts which bring the maximum social welfare. Then with the second-step network flow optimization model, the transaction partners and the transaction amounts are matched, as well as the optimal paths for each transaction partners. With the transaction paths known, the tracing of the power loss can be easily obtained. Secondly, according to the problem of network loss allocation, with the paths known, two reasonable algorithms to allocate the losses are put forward. One is traditional proportional sharing method, which is based on the proportional energy flow distribution. And another one is a new profit proportional sharing method, which is based on the proportional profit flow distribution. Compared with the traditional method, the new method considers the economic factors. Finally, basing on the simplified provincial power grid nodes and UHV grid in China, the experimental verification and comparative analysis on the centralized matching transactions is carried out. It proves that the models not only can effectively solve the problem of path optimization and multiple transactions in complex grid structure, but also can form the complete transaction path, which can easily trace the loss. Further more, by comparing the loss-allocation result with two kinds of loss-allocation algorithms, the new algorithm is better to reflect the economic factors.