Method for prolonging power supply radius of power distribution network in sparse region by applying power electronic voltage regulator

Abstract

The invention discloses a method for prolonging the power supply radius of a power distribution network in a sparse region by applying a power electronic voltage regulator, and belongs to the technical field of medium-low voltage distribution networks. According to the method, a voltage hierarchical coordination control strategy is adopted, a power electronic voltage regulation device is equivalent to a node power injection model, equivalent node active and reactive regulation quantity, namely node injection additional power, is calculated through particle swarm optimization in a double-layeroptimization mode, and then load flow calculation is conducted through the additional power; and the compensation voltage and the phase angle of the power electronic voltage regulator are deternubed to realize decoupling of power compensation optimization calculation and load flow calculation. Example verification is carried out in an improved IEEE33 node equivalent model system, and results provethat the method can effectively reduce line voltage drop, and decoupling of power optimization and load flow calculation can reduce calculation complexity and improve operation precision.

Description

technical field [0001] The invention relates to the technical field of medium and low voltage distribution networks, in particular to a method for extending the power supply radius of a distribution network in a sparse area by using a power electronic voltage regulator. Background technique [0002] Sparse areas mainly refer to areas that are not suitable for human production and life, such as plateaus, deserts, and extreme cold. The main characteristics of such areas are small population density, scattered distribution, and low power consumption. Among them, the Guoluo Tibetan Autonomous Prefecture in Qinghai Province is one of the typical representatives of the sparse power supply areas in the west. In order to promote the further development of sparse areas, in addition to solving the problem of electricity consumption, it is also necessary to ensure the quality of electricity consumption for users. The power supply lines of the distribution network in the Guoluo area ar...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems in the prior art that the power supply radius of the distribution network in sparse areas is insufficient and the power loss is relatively large in the way of high power compensation. The method of grid power supply radius uses multiple power electronic voltage regulators to participate in the voltage regulation of medium and low voltage distribution networks, and designs a layered control strategy based on particle swarm optimization

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