Abstract
The power supply and distribution network of prosumer group is equipped with contact switch and section switch. After feeder fault occurs, the topological structure of distribution network can be adjusted by changing the switch state of each switch in the system, so as to realize the reconstruction after the fault, so as to restore the power supply in the fault free area. The optimal configuration of different types of switchgear in the appropriate position of the distribution network can reduce the time of fault location and isolation, and further realize the reconfiguration of the distribution network after the fault occurs, which greatly improves the reliability of the power supply and distribution network for prosumer group. This paper introduces a series of Boolean expressions to describe the existence of switches in distribution network, and then determines the corresponding load interruption time according to different fault types. On this basis, a distribution network fault reconfiguration model is established. By minimizing the investment cost and network loss, a multi-objective optimization model with power supply reliability as the index is established. Finally, the proposed model is tested through the RBIs bus 4 network. The test results show that the solution can effectively reduce the investment cost, improve the reliability of the distribution network, and maximize the investment income.
Highlights
As the last important link facing users, the distribution network is the key part to ensure the quality of power distribution
The outage loss and the whole life cycle cost of switch configuration, how to determine the optimal number and location of switches in the distribution network under the requirements of power supply reliability is a hot topic in the field of distribution automation at home and abroad [1]
This paper focuses on the optimal configuration of sectional switches [17]
Summary
As the last important link facing users, the distribution network is the key part to ensure the quality of power distribution. The outage loss and the whole life cycle cost of switch configuration, how to determine the optimal number and location of switches in the distribution network under the requirements of power supply reliability is a hot topic in the field of distribution automation at home and abroad [1]. L. Fan et al.: Multi-Objective Optimal Configuration of Multiple Switchgear Considering Distribution Network Fault Reconfiguration distribution network is proposed in reference [5]. The main contributions of this paper can be summarized as follows: 1) In this paper, the existence of different switchgear in the distribution network is described by Boolean expressions, and based on this, the fault isolation time and user power loss time under different fault scenarios are calculated, so as to establish a fault reconstruction model considering multiple switchgear. The optimal switch configuration scheme is given under different reliability constraints, constrained by the switch installation location and voltage quality
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