Calculation method for high-frequency harmonic power flow of active power distribution network

Abstract

The invention provides a calculation method for high-frequency harmonic power flow of an active power distribution network, aiming at the problems of how to calculate the high-frequency harmonic power flow of the active power distribution network, and no related calculation methods in the prior art. The calculation method comprises the steps of 1) obtaining a high-frequency harmonic impedance model of each component; 2) performing equivalence on high-frequency background harmonics and voltage source and current source type grid-connected inverters; 3) calculating harmonic voltages of to-be-calculated nodes of the active power distribution network during separate action after equivalence; and 4) obtaining the high-frequency harmonic power flow of the to-be-calculated nodes by utilizing a superposition theorem. According to the method, the high-frequency harmonic power flow of the active power distribution network is obtained by utilizing an equivalent high-frequency harmonic model of the active power distribution network and the superposition theorem in electrotechnics, so that high-frequency harmonic power flow distribution can be mastered more accurately and harmonic control measures can be better established for reducing harmonic control cost and influence on a power system; and therefore, the method has a very important effect for research and development of the active power distribution network.

Description

technical field [0001] The invention relates to the technical field related to the field of high-frequency harmonic calculation of power systems, in particular to a calculation method of high-frequency harmonic flow in an active distribution network. Background technique [0002] In recent years, with the increasingly prominent energy shortage and environmental problems, new energy power generation technology has developed rapidly with the strong support of national policies. A large number of new energy power generation devices are connected to the grid in the form of distributed power sources. Its advantages have attracted more and more attention. When the distributed power supply gradually exerts its advantages, it also brings a series of negative effects to the power system. The problems brought by distributed power generation have gradually become the focus of electric power workers and academic researchers in recent years, specifically manifested in the impact of high...

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Problems solved by technology

However, how to calculate the high-frequency harmonic power flow of the active distribution network, there is no relevant calculation method in the prior art

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