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Determination method of power grid operation mode by configuring shunt capacitors to relieve voltage sag

A technology of voltage sag, determination method, applied in the direction of AC network voltage regulation, electrical components, circuit devices, etc.

Inactive Publication Date: 2019-01-22
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to reduce the harm of voltage sag to sensitive loads is not considered by combining the economical configuration of shunt capacitors with network reconfiguration

Method used

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  • Determination method of power grid operation mode by configuring shunt capacitors to relieve voltage sag
  • Determination method of power grid operation mode by configuring shunt capacitors to relieve voltage sag
  • Determination method of power grid operation mode by configuring shunt capacitors to relieve voltage sag

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Embodiment Construction

[0092] Such as figure 1 The shown method for determining the operation mode of a power grid equipped with shunt capacitors to relieve voltage sags includes the following steps:

[0093] Step 1. The parallel capacitor configuration plan is determined, and the process is as follows:

[0094] Step 101: Obtaining the optional shunt capacitor configuration scheme of the power grid: According to whether shunt capacitors are installed on each bus bar in the power grid to be configured and the capacity of the shunt capacitors installed, multiple different optional shunt capacitor configuration schemes of the power grid to be configured are obtained;

[0095] Each of the optional shunt capacitor configuration schemes includes the shunt capacitor configuration information of each bus in the power grid to be configured, and the shunt capacitor configuration information of each bus includes whether the shunt capacitor is installed on the bus and whether the shunt capacitor is installed Capacity...

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Abstract

The invention discloses a method for determining the power grid operation mode for configuring parallel capacitors to alleviate voltage sag, which includes the following steps: 1. Determine the parallel capacitor configuration plan: 101. Obtain the optional parallel capacitor configuration plan for the power grid; 102. Feasibility judgment; 103. Judgment of power grid network losses; 104. Judgment of the impact of voltage sag; 105. Judgment of investment costs and determination of optimized parallel capacitor configuration plan; 2. Optimization of power grid operation mode: 201. Determination of optional power grid operation modes; 202. Feasibility judgment; 203 , Economic judgment; 204. Optimization judgment, and determine the optimal operation mode of the power grid to be optimized. The method of the invention is simple, reasonably designed, convenient to implement, and has good use effect. The determined power grid operation mode is reasonable, which not only reduces network losses, but also effectively alleviates voltage sag, takes into account the economical configuration of parallel capacitors in the power grid, and can realize the power grid safe and economical operation.

Description

Technical field [0001] The invention belongs to the technical field of optimized operation of power grids, and in particular relates to a method for determining a power grid operation mode configured with shunt capacitors to relieve voltage sags. Background technique [0002] In recent years, with the rapid development of computer technology and power electronics technology, a large number of sensitive loads have appeared among power users. Sensitive loads are sensitive to voltage sags (sags), voltage swells (swells) and short-term interruptions (interruption). Quality disturbances are very sensitive. The failure of a single device or component may cause the entire production line to be scrapped. The voltage sag can cause huge losses to users and social economy. This has been regarded by experts at home and abroad as the most serious power quality problem. [0003] In the traditional shunt capacitor configuration, the voltage sag of the power grid is not considered. The goal is to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/12
CPCH02J3/00H02J3/12H02J2203/20Y02E40/30
Inventor 马莉
Owner XIAN UNIV OF SCI & TECH
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