Distribution Network Reconfiguration Model Research Articles

Dynamic reconfiguration of AC/DC hybrid distribution network considering non-ideal linear BES model

The charging and discharging process of battery energy storage (BES) directly affects its cycle aging. Therefore, considering the cycle aging cost and demand response of BES, this paper proposes a dynamic reconfiguration method of AC/DC hybrid distribution network. By sampling the operation area of charging and discharging power, the BES model in the non-ideal state is reconstructed into a linear model in the convex envelope set of sampling points. On this basis, the cycle aging cost models based on the cumulative throughput and discharge depth are established respectively, and the AC/DC hybrid distribution network reconfiguration model with the minimum comprehensive cost is constructed, and the mixed integer second-order cone programming method is used to solve it. The effectiveness and economy of the proposed reconfiguration method for AC/DC hybrid distribution network are verified by simulation on a modified 33-bus and 70-bus system.

Optimal strategies for distribution network reconfiguration considering uncertain wind power

The uncertainty of wind power can cause side-effects indistribution network reconfiguration. For reducing the impact from uncertainty in distribution network reconfiguration, the hard strategy of compressed air assisted wind turbine system (CAAWTS) and the soft strategy based on robust optimization are proposed in this paper. Since the energy storage capacity of CAAWTS is generally small, the performance of the hard strategy is limited. The soft strategy based on robust optimization by creating an uncertain set is applied to enhance the performance of the hard strategy. The proposed robust optimization model of distribution network reconfiguration is then solved by the maximum explicit method. Numerical examples show that the proposed hard and soft strategies can effectively solve the influences of uncertain wind power on the problem of distribution network reconfiguration, while the economic performance of the system can be improved.

Summary of research on distribution network reconfiguration

Distribution network reconfiguration is an important means to optimize the operation of distribution network. The the reconfiguration of distribution network can change the opening and closing state of segmentation switch and tie switch in the distribution network without increasing investment. It can achieve the purpose of reducing network loss, balancing load to eliminate overload and light load, improving power supply reliability and improving power supply voltage quality. Therefore, it has important practical significance to accelerate the problem of distribution network reconfiguration. In this paper, the mathematical model of distribution network reconfiguration is given for the characteristics of distribution network, and various algorithms for distribution network reconfiguration are introduced. The advantages and disadvantages of various algorithms are analyzed, and the distribution network is more comprehensively reflected.

Research on Distribution Network Reconfiguration Method Considering Switching Operations

The traditional distribution network reconfiguration method does not consider the impact of switching operations, resulting network equipments voltage instability and user blackouts in actual implementations. In this paper, the loop operation security constraints have been fully taken into account as establishing distribution network reconfiguration model by introducing constraints into the traditional model. The greedy random adaptive search procedures (GRASP) is adopted to obtain optimal solution and detailed steps of reconfiguration scheme and switching operation for distribution network, which ensures the solution is realized without network equipments voltage instability and user blackouts. After IEEE 14-bus system verification, this method shows its better adaptability and practical value, which fully combines actual work statues to improve distribution network reliability.

A rule based comprehensive approach for reconfiguration of electrical distribution network

This paper proposes a rule based comprehensive approach to study distribution network reconfiguration (DNRC). The DNRC model with line power constraints is set up, in which the objective is to minimize the system power loss. In order to get the precise branch current and system power loss, a power summation based radiation distribution network load flow (PSRDNLF) method is applied in the study. The rules that are used to select the optimal reconfiguration of distribution network are formed based on the system operation experiences. The proposed rule based comprehensive approach is implemented in distribution network in Guiyang South Power Supply Bureau. For the purpose of illustrating the proposed approach, two distribution network systems are tested and analyzed in the paper.

Optimal reconfiguration of electrical distribution network using the refined genetic algorithm

This paper proposes an improved method to study distribution network reconfiguration (DNRC) based on a refined genetic algorithm (GA). The DNRC model, in which the objective is to minimize the system power loss, is set up. In order to get the precise branch current and system power loss, a radiation distribution network load flow (RDNLF) method is presented in the study. The refined genetic algorithm is also set up, in which some improvements are made on chromosome coding, fitness function and mutation pattern. As a result, premature convergence is avoided. The proposed approach is tested on 16-bus and 33-bus distribution networks. Study results are given in the paper.