Optimization Method for Constructing Load Restoration Strategy of Transmission Systems
Qin Zhijun1, Hou Yunhe1, Li Dahu2, Wang Chong1, Peng Chaoyi1, Wen Jinyu3
1. Department of Electrical and Electronic Engineering The University of Hongkong Hongkong China; 2. Hubei Electric Power Dispatching and Communication Center Wuhan 430077 China; 3. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China
Abstract This paper proposes an optimization based method to construct load restoration strategy for transmission systems. Firstly, the load restoration process is divided into a sequence of co-related steps. In each step, the total amount of load pickup is restricted by the synchronized generation and the operational constraints of each generator. The objective in each step is to maximize the load pickup. Secondly, the maximum load pickup problem is formulated as a mixed-integer nonlinear load restoration (MINLR) model and solved via a branch-and-cut (B&C) framework. The Gomory rounding cut, the knapsack cover cut, and the fixing variable cut are incorporated into each node of the enumeration tree to reduce the scale of the sub-trees. Thirdly, the load restoration strategy is obtained by solving a number of MINLR models till all load increments are restored. The RTS 24-bus system and the IEEE 118-bus system are used to illustrate the efficiency of the proposed method.
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2016, Vol. 31 
