Load transfer method and device for improving reliability of distribution network

A technology of load transfer and reliability, applied in the direction of circuit devices, electrical components, AC network circuits, etc., can solve the problems of not being able to guarantee 100% reliable operation of components, increasing social instability, and reducing comfort, so as to improve power supply quality, avoiding line overload situations, improving comfort

Pending Publication Date: 2019-09-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a general fault power failure, the load will be supplied with power only after the fault is repaired, which will reduce people's comfort and increase social instability.
For example: the government, hospitals and other places do not allow power outage accidents for the first-level load, if a power outage accident occurs, it will cause major property losses
However, it is not possible to guarantee 100% reliable operation of the components. In order to avoid the occurrence of power outage accidents, it is necessary to fully prepare for power outages

Method used

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  • Load transfer method and device for improving reliability of distribution network
  • Load transfer method and device for improving reliability of distribution network
  • Load transfer method and device for improving reliability of distribution network

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0043] like figure 1 As shown, this embodiment provides a load transfer method for improving the reliability of a distribution network, including the following steps:

[0044] In step S1, a substation fault signal is acquired in real time.

[0045] In step S2, load data of the faulty substation and the convertible substation are collected. A tie switch is provided between the faulty substation and the convertible substation. The faulty substation is denoted as substation A, and the convertible substation is denoted as substation B.

[0046] In step S3, the Newton-Raphson method is used to calculate the power flow of the topology structure where the convertible substation is located, which can easily obtain the effective value, obtain the current load of the tie line directly connected to the tie switch when the power supply is not transferred, and then obtain the current load when the power supply is not transferred. The load ratio of the tie line, which is superimposed on th...

Embodiment 2

[0075] This embodiment provides a load transfer device for improving the reliability of a distribution network, the device can implement the method described in Embodiment 1, and includes a startup module, a data acquisition module, a constraint condition building module, and an output module, wherein the startup module The module is used to acquire the fault signal of the substation in real time; the data acquisition module is used to collect the load data of the faulty substation and the convertible substation, and a tie switch is arranged between the faulty substation and the convertible substation; the constraint condition building module is used to construct the transfer Constraints, including the total load constraint of the transferable substation, the maximum instantaneous load rate constraint of the tie line, and the variable active power utilization rate constraint of the transferable substation group; the output module is used to obtain, based on the load data, a tria...

Embodiment 3

[0084] This embodiment provides a load transfer device for improving the reliability of a distribution network, including a memory and a processor, wherein the memory stores a computer program, and the processor invokes the computer program to execute the method described in Embodiment 1. step.

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Abstract

The present invention relates to a load transfer method and a device for improving reliability of a distribution network. The method comprises the following steps: a substation fault signal is obtained in real time; the load data of the faulty substation and a load transferable substation is collected; a tie switch is provided between the faulty substation and the load transferable substation; load transfer constraint conditions are constructed, which include the total load constraint of the load transferable substation, the maximum instantaneous load rate constraint of a tie line and the maximum load transfer constraint; and based on the load data, the optimal load transfer scheme meeting the load transfer constraint conditions is obtained by the trial and error method. Compared with theprior art, the invention has the advantages such as power supply reliability maximization.

Description

technical field [0001] The invention relates to the technical field of power grid power supply, relates to a load transfer method, and in particular relates to a load transfer method and device for improving the reliability of a distribution network. Background technique [0002] With the development of social economy and social progress, people's living standards continue to improve. At the same time, people's requirements for power companies are not limited to the increase of power supply, but also put forward higher requirements for timely restoration of power supply after failure. . In general, after a power failure, the load will be powered only after the fault is repaired, which will reduce people's comfort and increase social instability. For example, the government, hospitals and other places are not allowed to have a power outage accident for the primary load. If a power outage accident occurs, it will cause major property losses. However, in fact, 100% reliable o...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/00
CPCH02J3/06H02J3/0073
Inventor 刘小康任丽佳张菁宋紫阳刘传修王鑫
Owner SHANGHAI UNIV OF ENG SCI
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