The implementation of time-of-use (TOU) pricing can guide power consumers’ electricity using behavior to shift the load range. However

there is a complicated non-linear relationship between load and reliability. The paper focuses on the impact of demand response on distribution system reliability. An integrated model is proposed to describe TOU pricing

which consists of three steps: the division of TOU periods

the access to the electricity price in the optimization

and the constraint conditions considering operation and power market constraints while the objective function is determined by minimum peak load and minimum load range. Then

on the basis of the conventional evaluation method

an improved clustered load model based on dichotomy is proposed to handle the real-time load. Finally

accurate reliability indices are obtained by weighting average indices under different load levels. The validity of the above model and method is studied through numerical tests on modified RBTS BUS6 test system. The results show that TOU pricing has a positive impact on the distribution system reliability. This work is supported by National Natural Science Foundation of China (No. 51277074).