Three-level coordinated control method for reactive power and voltage in distribution network

Abstract

The invention discloses an electric distribution network reactive-voltage three-level coordination control method, which comprises the following steps: (1) creating data input by self structure duplication, (2) performing forward chaining, (3) performing back substitution, (4) performing astringency judgment, (5) returning a result to a caller. The method has the advantages that 1) layered control over equipment according to the installation position and the control range of the equipment; 2) the variation trend of the operating state of a power grid is judge in advance according to short-run and super short-run load predicting technologies, the perspectiveness of adjustment tactics is ensured, the adjustment times of the equipment are reduced, and invalid actions are avoided; 3) the current situation that adjustment equipment of the electric distribution network is deficient is solved by classified coordination control, the adjustment potence of the adjustment equipment is fully exerted, and the economic pressure for investing and constructing the distribution network is reduced; 4) the method can adapt to multiple conventional and unconventional adjustment equipment, such as a subdivided capacitor, a distribution transformer tap, a line voltage regulator, a line capacitor, SVG, SVC and TSF.

Description

technical field [0001] The invention relates to a three-level coordinated control method for reactive power and voltage of a distribution network, which belongs to the technical field of power distribution networks. Background technique [0002] At present, the distribution lines in most areas widely adopt the unidirectional radiation power supply mode with large trunks and multi-branches. Some lines have low load rate, large seasonal load changes, long power supply radius, and high reactive power consumption, which lead to low power factor, large line loss, and poor terminal voltage quality. Contents of the invention [0003] The present invention proposes a three-level coordinated control method for reactive power and voltage of a distribution network. The purpose of the method is to comprehensively analyze the entire power grid and correct the unreasonable current grid operation mode in view of the above-mentioned problems existing in the prior art. In some places, adj...

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Problems solved by technology

[0003] The present invention proposes a three-level coordinated control method for reactive power and voltage of a distribution network. Its purpose is to comprehensively analyze the entire power grid and correct the unreasonable current grid operation mode in view of the above-mentioned problems existing in the prior art. In some places, adjust the gear position of the tap of the on-load tap changer and switch on and off the reactive power compensation capacitor, and perform voltage and reactive power optimization control from the perspective of the entire network. According to the reactive power optimization result, select from high-voltage distribution network to low-voltage distribution The network implements reactive power optimization compensation layer by layer, so that the voltage is qualified, the reactive power is reasonable, and the problems of large loss of distribution network lines and poor quality of terminal voltage are effectively solved.

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