Power grid parallel capacitor configuration method based on voltage sag assessment index

A voltage sag and evaluation index technology, applied in the direction of AC network voltage adjustment, instrumentation, data processing applications, etc., can solve the problem of not considering the grid voltage sag

Inactive Publication Date: 2017-05-31
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] The traditional shunt capacitor configuration does not consider the grid voltage sag. Since the proportion of sensitive loads in industrial loads in modern production is increasing, the problem of voltage sag is becoming more and more serious. It is necessary to consider how to configure shunt capacitors. Alleviating the voltage sag of th

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  • Power grid parallel capacitor configuration method based on voltage sag assessment index
  • Power grid parallel capacitor configuration method based on voltage sag assessment index
  • Power grid parallel capacitor configuration method based on voltage sag assessment index

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Embodiment Construction

[0063] Such as figure 1 A grid shunt capacitor allocation method based on the voltage sag evaluation index shown includes the following steps:

[0064] Step 1. Acquisition of optional shunt capacitor configuration schemes for the power grid: according to whether shunt capacitors are installed on each bus in the power grid to be configured and the capacity of the installed parallel capacitors, multiple different optional shunt capacitor configuration schemes for the power grid to be configured are obtained;

[0065] Each of the optional shunt capacitor configuration schemes includes the shunt capacitor configuration information of each bus in the grid to be configured, and the shunt capacitor configuration information of each bus includes whether a shunt capacitor is installed on the bus and the installed shunt capacitor capacity;

[0066] Step 2. Feasibility judgment: Perform power flow calculations for the power grids to be configured under each optional shunt capacitor conf...

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Abstract

The invention discloses a power grid parallel capacitor configuration method based on a voltage sag assessment index. The method comprises the following steps of (1) acquiring power grid selectable parallel capacitor configuration schemes; (2) judging feasibility, and screening feasible parallel capacitor configuration schemes; (3) judging power grid transmission loss, and screening a low-transmission-loss parallel capacitor configuration scheme; (4) judging a voltage sag influence: 401, calculating the power grid voltage sag assessment index; 402, determining a low voltage sag influence configuration scheme; (5) judging input cost: 501, calculating the input cost; 502, determining an optimal parallel capacitor configuration scheme. The method provided by the invention is simple in step, reasonable in design, and convenient to implement, and has a good use effect, not only is the transmission loss reduced, but also voltage sag is effectively relieved, the economical efficiency of power grid parallel capacitor configuration is also considered, safe operation and economic operation of a power grid can be realized, and the popularization and application value is high.

Description

technical field [0001] The invention belongs to the technical field of grid optimization operation, and in particular relates to a grid shunt capacitor configuration method based on a voltage sag evaluation index. Background technique [0002] With the advancement of science and technology, the rapid development of the national economy and the continuous improvement of people's living standards, people's demand and dependence on electricity are becoming stronger and stronger. The proportion of various sensitive loads in industrial loads is increasing. Sensitive loads are very sensitive to grid disturbances such as voltage sags, voltage swells, and short-term interruptions. Sensitive users have higher and higher requirements for reliable and safe operation of the grid. come higher. Therefore, the analysis, evaluation and treatment of voltage sag has great practical significance. [0003] At present, scholars at home and abroad have evaluated the voltage sag in Li Yan, Duan ...

Claims

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Application Information

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IPC IPC(8): H02J3/12G06Q10/04G06Q50/06
CPCH02J3/12G06Q10/04G06Q50/06Y02E40/70Y04S10/50
Inventor 马莉
Owner XIAN UNIV OF SCI & TECH
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