Fast restoration of large area breakdown for power distribution systems

Abstract

An adjacent table-based simplified model of distribution networks containing medium voltage buses of a substation is established. Identification of bus outage and the condition to start fast restoration procedure are discussed. A complex load shading parameter is set up to describe various load shading schemes. The imaginary part of the load shading parameter describes the states of switches of load shading schemes while the real part is the corresponding amount of shaded load. A new concept of independent tripping operation is also put forward. The procedure to search the operation with the least amount of shaded load for a feeder and a connected domain are detailed. The procedure for fast restoration of a large area breakdown of the whole distribution network under emergency states is dealt with using a typical grid distribution network as an example. Results of analysis show that the direct load shading scheme under the most balanced topology is not always the optimal scheme. The proposed method can obtain the optimal operating mode with the least amount of shaded load thus showing its feasibility.

A Tabu Search Algorithm for Fast Restoration of Large Area Breakdown in Distribution Systems

“…It can be seen from Table 1 and Table 2 that the times of switching operation may be reduced by increasing the value of  3 with a little decreasing of the amount of the energized loads, which shows the advantage of the proposed approach than [6].…”

“…A fast restoration approach of large area break down based on numerical optimization is put forward in [6]. Although it is smart, it can only deal with the simple index of the minimum load shedding.…”

Fault Isolation and Reconfiguration of Multi-Voltage Level Distribution Network Based on PSO Algorithm

“…Each particle moves its position in a search space and updates its velocity according to its own and neighbors' flying experience aiming to find a better position for itself. Applying PSO algorithm for network reconfiguration, the methods of coding and particle updating are as following [4]- [7].…”