Optimization method and system for topological structure of power distribution network

Abstract

The invention discloses an optimization method and system for a topological structure of a power distribution network. The optimization method comprises the steps of when it is determined that the closing time of a target interconnection switch in the topological structure of the current power distribution network is less than a preset time threshold value, closing the target interconnection switch to form a loop; disconnecting a target section switch in the loop; determining a target function value after the target section switch is disconnected; traversing each section switch in the closed loop and obtaining a minimum target function value; when the minimum target function value is smaller than an initial target function value, performing interchange between the section switch in the closed loop corresponding to the minimum target function value and the target interconnection switch; taking any one interconnection switch except the target interconnection switch in the topological structure of the current power distribution network as a new target interconnection switch, and returning to perform the step of closing the target interconnection switch; and when it is determined that the preset traversing time is completed, obtaining the optimal topological structure of the power distribution network. By adoption of the optimization method and system, the voltage deviation of the power distribution network in different operating states of the power distribution network can be effectively lowered, the network loss of the power distribution network is lowered, and the power supply quality of the power distribution network is improved.

Description

technical field [0001] The invention relates to the technical field of distribution network operation optimization, in particular to a distribution network topology optimization method and system. Background technique [0002] With the development and utilization of new energy, the scale of distributed power access to the distribution network is increasing day by day, and its impact on the distribution network is also increasing, making the operation of the existing distribution network more complicated. The output of new energy is uncertain, and the impact on the operation of the distribution network cannot be described qualitatively. The original calculation method of the distribution operation mode can no longer meet the actual production needs of the power system. [0003] Aiming at the problem of uncertainty in the operation mode of the distribution network, traditionally, the uncertainty problem is transformed into multiple deterministic problems for analysis and solut...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a distribution network topology optimization method and system for the traditional optimized distribution network topology network loss, which reduces the power supply quality of the distribution network.

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