Phase-change switch optimal configuration method and system based on particle swarm optimization algorithm

Abstract

The invention discloses a phase-change switch optimal configuration method and system based on a particle swarm optimization algorithm. The method comprises the steps of: constructing a phase-change switch configuration model according to user load power and power distribution network topology node impedance; solving the phase-change switch configuration model by using a particle swarm optimization algorithm by taking the minimized three-phase unbalance degree and the action times of the phase-change switch as target functions to obtain the optimal switch action of the phase-change switch; determining the load participating in commutation according to the change of the load before and after the optimal switching action of the commutation switch is executed; sorting the commutation times ofthe loads participating in commutation, wherein the position of the load with the maximum commutation times is the installation position of the commutation switch; and establishing a phase-change switch configuration model according to the topological structure of the power distribution network and the load power data, solving the model by using a particle swarm optimization algorithm by taking the three-phase unbalance degree and the phase-change frequency as targets, and determining the installation position of the phase-change switch according to the optimal solution, thereby realizing reasonable configuration of the phase-change switch.

Description

technical field [0001] The invention relates to the technical field of power quality control, in particular to a commutation switch optimization configuration method and system based on a particle swarm optimization algorithm. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] There are many types of supply loads in the actual distribution station area, and the density of each load is different. The fluctuation of the load itself will increase the degree of unbalance of the three phases; the phase sequence switching of the load through the intelligent phase change switch can realize the balanced configuration of the load , realize the treatment of three-phase unbalance, and can avoid the problems of slow and high risk of manual commutation operation. [0004] The phase change switch only contains one control terminal and several execution te...

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Problems solved by technology

When installing a reversing switch, loads that are sensitive to power quality requirements should be avoided; installers usually install according to their own experience and the imbalance of each branch circuit, but the inventor believes that this method is inevitable. The difference in the treatment effect of the three-phase unbalance is caused. Although certain configuration principles are proposed for the installation and configuration of the phase-change switch, no research has been done on the configuration of the installation point of the phase-change switch. In actual projects, the installation staff mainly Determine the location point based on your own experience, and then install the reversing switch

[0005] In addition, by calculating the phase unbalance degree based on the effective value of the user load current, active power, and electricity consumption of the distribution network as reference information, there is a problem of ignoring the asymmetry of the current phase angle; only the current effective value, or reactive power , the degree of current unbalance cannot be accurately represented only by considering the active power; and the problem of load characteristics cannot be truly reflected only by the effective value of current and voltage, so in the configuration of the commutation switch, the three-phase unbalance and load characteristic

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