Evaluation Method for the Impact of Intermittent Energy Power Fluctuation on Multi-level Distribution Network Voltage

Abstract

The invention relates to defining a method for evaluating the impact of intermittent energy power fluctuations on the voltage of multi-level distribution networks, which mainly includes the following steps: 1) Define the depth index of intermittent energy sources, and use this to define the intermittent energy sources in multi-level distribution networks The index of the impact of power fluctuation on the voltage of the grid-connected point; 2) Define the intermittent energy grid-connected depth index of the topological connection and the node average voltage of the node load of the multi-level distribution network, and define the intermittent energy fluctuation in the multi-level distribution network An indicator for the average voltage effect. The index value calculated by the invention fits well with the actual value, and can evaluate the voltage change of the multi-level distribution network.

Description

technical field [0001] The invention relates to the technical field of grid voltage control, in particular to a method for evaluating the influence of intermittent energy power fluctuations on the voltage of a multi-level distribution grid. Background technique [0002] With the continuous development of economy and technology, the demand for energy is increasing. The shortage of traditional energy and the increasing adverse impact of fossil energy on the environment have promoted the development of renewable energy, including wind power and photovoltaic power generation. However, due to the intermittency and randomness of the output of these renewable energy sources, for example, wind power is affected by wind speed, and photovoltaic output is closely related to weather conditions. Sex and other aspects have brought about an impact that cannot be ignored. [0003] Multi-level distribution network can effectively and comprehensively control distributed energy, energy stora...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned difficulties in the prior art, aiming at the problem of over-limit voltage that is easily caused by a large number of grid-connected high-permeability intermittent energy sources on the active distribution network, and to define an index that considers the impact of intermittent energy power fluctuations on voltage, Estimate the voltage change caused by intermittent energy output fluctuations under the condition of meeting a certain accuracy, so as to evaluate the impact of intermittent energy output fluctuations on the operating state of the distribution network

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