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Low-frequency load reduction system and method

A low-frequency load shedding and capacity technology, applied in the field of power systems, can solve problems such as failure to meet expectations

Inactive Publication Date: 2015-06-10
BEIJING SIFANG JIBAO AUTOMATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of these methods are to use the frequency or frequency change rate to determine the system active power imbalance and formulate an emergency load shedding strategy. However, only relying on a single electrical quantity of frequency or voltage change cannot achieve the desired effect in practice.

Method used

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  • Low-frequency load reduction system and method

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.

[0049] It should be understood, however, that the invention is not limited to the particular exemplary embodiments disclosed, but covers all modifications, equivalents, and alternatives falling within the scope of the disclosure. Throughout the description of the figures, the same reference numerals denote the same elements.

[0050] Also, it should be understood that as used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Also it will be understood that when a component or unit is referred to as being “connected” or “coupled” to another component or unit, it can be directly connected or coupled to the other component or ...

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Abstract

The invention provides a low-frequency load reduction system and method. The system comprises a data acquiring module, a data preprocessing module, a low-frequency load reduction quantity calculating module and a low-frequency load reduction performing module which are sequentially connected, wherein the data acquiring module is used for acquiring the system data; the data preprocessing module is used for preprocessing the data acquired by the data acquiring module; the low-frequency load reduction quantity calculation module is used for calculating the total load reduction quantity of the system and the load reduction quantity of each load bus of the system; the low-frequency load reduction performing module is used for determining the tangential load bus and the corresponding tangential load quantity. With the adoption of the system and the method, the system frequency can be quickly returned to be stable, and meanwhile, the system voltage stability can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to power system relay protection equipment and methods. Background technique [0002] Preventing blackouts in the power system has become an important issue facing the power system today. With the long-distance power transmission and high-power transmission, the modern power system is running on a smaller reserve capacity and on the edge of stability. This situation Under the current situation, traditional protection and control measures are gradually insufficient for the safe and stable operation of the system, and actively exploring improvements and proposing new strategies has become an inevitable choice. Under-frequency load shedding (UFLS), as the last line of defense for system protection, has been widely used in power systems. [0003] Underfrequency load shedding is a safety control measure to prevent frequency collapse in power systems. That is, when the frequency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14
CPCY02B70/3225Y04S20/222H02J3/14
Inventor 秦红霞黄少锋宋小舟李继晟张华年王增平马静闫新
Owner BEIJING SIFANG JIBAO AUTOMATION
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