A distribution network measurement and configuration method considering multiple network structures

Abstract

The invention discloses a power distribution network measurement configuration method considering various network structures. The method comprises the steps of pre-estimating a running state of a power distribution network and determining a relationship between a measurement quantity and a state quantity; according to an actual running state of the power distribution network, constructing various network structures in different states during measurement configuration; analyzing saturation measurement characteristics of a power distribution network system in different network structures, and determining a saturation measurement quantity based on a heuristic algorithm; constructing a measurement configuration model by taking a minimum weighted sum of estimated errors of the various network structures as a goal under a constraint condition that the saturation measurement quantity is an installation quantity upper limit of the measurement quantity; and solving a weight coefficient of the measurement configuration model by utilizing an analytic hierarchy process, traversing all selectable schemes, solving an optimal solution, and outputting an optimal measurement configuration scheme. According to the method, the influence difference of different network structures on the measurement configuration is analyzed in a manner of the weight coefficient, so that a measurement configuration result is more practical.

Description

technical field [0001] The invention relates to a distribution network measurement and configuration method considering multiple network structures. Background technique [0002] The development of advanced application software technology and self-healing control technology of intelligent distribution network has greatly improved the automation level of distribution network, and online network reconstruction is possible. Network reconstruction will be used as an active distribution network to reduce network loss and increase voltage. levels, and common measures to restore power to loads after a fault. Therefore, the impact of network reconfiguration on measurement configuration cannot be ignored, and the measurement configuration based on a network structure can no longer meet the requirements of distribution network state estimation accuracy. Therefore, it is necessary to design a robust measurement system that takes into account various network structures. [0003] Reaso...

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Problems solved by technology

[0006] (1) For a single network structure, the final measurement configuration scheme only ensures that the state estimation accuracy of a single network structure meets the requirements. If the network structure changes, the estimation accuracy is difficult to guarantee, and the robustness of the measurement configuration is insufficient;

[0007] (2) A small number of measurement configuration methods for multiple network structures have the same influence weight for each network structure, and do not consider the difference in the impact of different network structures on measurement configuration;

[0008] (3) There is no basis for the upper limit of the measurement quantity

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