Distribution network capacitive current distribution compensation method

A capacitive current, distributed compensation technology, applied in the field of electric power, can solve the problems of high regulation lower limit, insufficient capacity configuration of arc suppression coils, and high neutral point voltage

Active Publication Date: 2016-10-12
WUHAN UNIV
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Problems solved by technology

[0004] If the capacity allocation of arc suppression coils is randomly carried out on the line according to the total capacity demand of the distribution network, then in the case of a line cut off or transferred, the corresponding arc suppression coil equipment will also withdraw from the grid or transfer, which may cause In the new operating state, the arc su

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  • Distribution network capacitive current distribution compensation method

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Embodiment Construction

[0046] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0047] An example of the present invention is figure 1 Shown, L 0 It is an automatically adjustable arc suppressing coil installed on the busbar, L 1 , L 2 ,...,L i It is a small-capacity arc-suppression coil installed on the line, and the capacity is fixed.

[0048] The technical solution adopted in the embodiment is as follows: a method for compensating distribution network capacitance current distribution, comprising the following steps:

[0049] Step 1. Obtain the relevant data information of the distribution network, and determine the variables and their value space of the mathematical model;

[0050] Step 2. Determine the constraints according to the system's requirements for compensation capacity;

[0051] Step 3. Taking the magnitude of the grounding residual current as the measure of the compensation effect, and aiming at the minimum gro...

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Abstract

The invention relates to the technical field of electric power, and specifically relates to a distribution network capacitive current distribution compensation method. The method comprises the steps as follows: S1, getting data information related to a distribution network, and determining the variables of a mathematical model and the value spaces thereof; S2, determining constraint conditions according to the system's requirement for compensation capacity; S3, building an objective function, with the magnitude of grounding residual current as a measure of compensation effect and minimal grounding residual current and lowest cost as the objective; and S4, optimizing and solving the objective function to get an optimal configuration scheme. According to the distribution compensation method, the configuration scheme of arc suppression coil distribution compensation is determined reasonably based on the magnitude of capacitive current of each line and by considering the possibility of line operation mode change. Thus, the resonance phenomenon caused by capacity decrease of the arc suppression coil is avoided, and a good compensation effect is achieved with small investment on equipment transformation.

Description

technical field [0001] The invention belongs to the technical field of electric power, in particular to a method for compensating distribution network capacitance current distribution. Background technique [0002] With the continuous improvement of the urban cable conversion rate, many new arc suppression coils appear to have insufficient capacity and need to be replaced by capacity expansion. After several transformations, it is no longer possible to increase the capacity on the original basis. If the complete set of equipment is replaced, the investment is relatively large. More importantly, when the capacitive current is too large, it is difficult to obtain a better compensation effect by using the traditional centralized arc suppression coil compensation method. Therefore, it is considered to carry out distributed compensation on the line, that is, divide the large capacitive current to be compensated into several small parts, and perform compensation on other lines o...

Claims

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Application Information

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IPC IPC(8): H02H9/08
CPCH02H9/08
Inventor 乐健周超王曹王银鸽周雷
Owner WUHAN UNIV
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