Uniform design-based self-healing evaluation for active distribution network

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With the increase in power demand and system complexity, accurately evaluate the self-healing performance of distribution network has become one of the key factors in ensuring the reliability and stability of power supply. To address the issues of incomplete evaluation scenarios and low evaluation efficiency in current self-healing evaluation, this paper proposes the uniform design-based method for evaluating the self-healing performance of the distribution network. It enables comprehensive and fast evaluation of self-healing under multiple fault scenarios. Firstly, three indicators are proposed to evaluate the self-healing performance: self-healing rate, self-healing speed, and self-healing operation complexity. Then, the calculation of three self-healing indicators is carried out under the self-healing strategy that coordinates both network reconstruction and island partition. By uniformly sampling the enumerated k-order system states, the computational time cost is greatly decreased, avoiding the problem of high computational complexity under high-order states and improving the efficiency of evaluation process. Finally, case study shows that the uniform design method greatly decreases the computational time (nearly 20 times faster than the state enumeration) on the IEEE 33-node distribution network.