A transient voltage quantitative evaluation method for a power distribution network containing high-permeability wind power

A technology with transient voltage and high penetration rate, applied in AC network voltage adjustment, wind power generation, electrical components, etc., can solve problems such as limitations, limited application scenarios, and inability to take into account, so as to improve applicability and avoid misjudgment problems , Improve the effect of transient voltage stability

Pending Publication Date: 2021-12-24
CHINA THREE GORGES UNIV
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Problems solved by technology

[0010] Most of the above evaluation indicators for the transmission network are limited to the specific network background, and can only evaluate the bus voltage under a single transient characteristic, and it is powerless for the bus voltage with multiple transient characteristics after the disturbance
In addition, for arbitrary fault forms and specific disturbance types, existing evaluation indicators generally have the problem of being unable to take into account, which makes their application scenarios severely limited

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  • A transient voltage quantitative evaluation method for a power distribution network containing high-permeability wind power
  • A transient voltage quantitative evaluation method for a power distribution network containing high-permeability wind power
  • A transient voltage quantitative evaluation method for a power distribution network containing high-permeability wind power

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Embodiment Construction

[0087] A method for quantitatively evaluating the transient voltage of a distribution network containing high-penetration wind power, comprising the following steps:

[0088] Step 1: For the scene of voltage sag, based on the binary table criterion, a voltage sag safety margin index for quantitatively evaluating the bus voltage stability margin is proposed;

[0089] Step 2: Construct a voltage swell safety margin index for the voltage swell scenario. By introducing a step factor, construct a transient voltage safety margin index based on an improved multi-binary table, and consider the intermittency and impossibility of wind power output The impact of objective factors such as controllability on the evaluation results of the indicators, and then make corresponding corrections to the indicators;

[0090] Step 3: On this basis, define the regional voltage qualification rate index, regional voltage safety margin index and regional voltage instability risk index;

[0091] Step 4: C...

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Abstract

The invention relates to a transient voltage quantitative evaluation method for a power distribution network containing high-permeability wind power, which comprises the following steps: firstly, constructing a voltage sag safety margin index suitable for being applied under a voltage sag condition based on a binary table criterion; and secondly, further constructing a voltage sag safety margin index, and effectively combining a sag index and a sag index by introducing a step factor to obtain a transient voltage safety margin index based on the improved multi-binary table. Besides, the influence of intermittency and uncontrollability of wind power output on the evaluation result is considered, so that the index is correspondingly corrected, and the applicability of the index in a changeable environment scene is improved. The method also includes: thirdly, defining a regional transient voltage qualified rate index, a regional transient voltage safety margin index and a regional transient voltage instability risk index to measure the transient voltage stability of a certain region; and finally, performing time domain simulation analysis on the power distribution network system of the IEEE15 node by using the proposed index, and verifying the effectiveness and universality of the index while quantifying each factor influencing the transient voltage stability of the power grid.

Description

technical field [0001] The invention relates to the field of transient voltage stability of a distribution network, in particular to a quantitative evaluation method for a transient voltage of a distribution network containing high-permeability wind power. Background technique [0002] In recent years, the penetration rate of wind power in the distribution network has gradually increased, which poses new challenges to the transient voltage stability of the power grid. Therefore, it is particularly important to establish a set of scientific and reasonable evaluation theories to quantitatively analyze the various factors affecting the transient voltage stability of distribution networks with high-penetration wind power. [0003] At present, some literatures have proposed indicators for evaluating the transient voltage stability of distribution networks, which can be summarized into the following three categories: [0004] 1): Use the two indicators of transient response recov...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06H02J3/16H02J3/38
CPCG06Q10/0635G06Q10/06393G06Q50/06H02J3/38H02J3/16H02J2300/28H02J2203/20Y02E10/76Y02E40/30
Inventor 徐艳春蒋伟俊孙思涵
Owner CHINA THREE GORGES UNIV
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