Optimal switching sequence path for distribution network reconfiguration considering different types of distributed generation

Abstract

Minimizing power losses in a distribution system is commonly realized through optimal network reconfiguration. In the past, network reconfiguration research was focused on planning, where the final configuration with the lowest power losses was the main goal. However, power losses during switching operations from the initial state to the final state of the configuration were not considered. This paper presents the optimal switching sequence path to minimize power losses during the network switching operation. Apart from this contribution, the simultaneous optimal network reconfiguration for variable load network and distributed generation (DG) output is also proposed. The proposed methodology involves the (i) optimal network reconfiguration with variable load and DG output simultaneously, and (ii) the optimal sequence of switching operations required to convert the network from the original configuration to the optimal configuration obtained from (i). The selected optimization technique in this work is the firefly algorithm. To assess the capabilities of the proposed method, simulations using MATLAB are carried out on IEEE 33‐bus radial distribution networks. The results demonstrate the effectiveness of the proposed strategy to determine the sequence path of switching operations, as well as the optimal network configuration and optimal output of DG units. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

Integrated database approach in multi‐objective network reconfiguration for distribution system using discrete optimisation techniques

“…It also directly affects reliability indices including the restoration time, energy not supplied and power loss. Therefore, switching sequence consideration is equally important for optimal configuration and reliability improvement [3].…”

Operational Cost Minimization of Electrical Distribution Network during Switching for Sustainable Operation

“…The maximum switching step required by the proposed technique equals the number of tie lines in the distribution network. However, previous researchers [21,29] require Hamming distance equal to one for switching search space compared to the proposed technique. Therefore, the proposed technique generates a dataset of Hamming distance equal to two for each stage to attain the optimal switching sequence, as shown in Table 3 for the IEEE 33-bus distribution network.…”

“…In reference to [21], consider the switching sequence search space that is equal to 2 * 1 2 h t ! * 1 2 h t !, where h t is the total Hamming distance between the initial and final configuration.…”

“…It is necessary to maintain the network operational condition during intermittent switching. In the past, most investigations were conducted on obtaining the minimum power loss by using NR, but few have considered the network switching sequence technique [21]. Moreover, the real-time optimal switching sequence was discussed in [22].…”

Risk averse energy management strategy in the presence of distributed energy resources considering distribution network reconfiguration: an information gap decision theory approach

“…The authors studied the power losses reduction and load restoration separately. Badran et al [14] focused on minimising the power losses during the switching operations of the DNR process, while the share of various DGs in obtaining the mentioned goal was investigated. Nick et al [15] proposed a seasonal planning procedure to optimally siting and sizing of the storage units and optimal DNR.…”