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Under-frequency load shedding device and method

A technology of low-frequency load shedding and frequency, which is applied in the direction of power network operating system integration, information technology support system, climate sustainability, etc., and can solve problems such as large frequency drop, poor effect, and deterioration of the ability to maintain frequency stability

Inactive Publication Date: 2015-09-30
LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Frequency is one of the power quality indicators. In today's highly developed power industry, maintaining frequency stability and ensuring power frequency quality is of great significance not only to the safe and stable operation of the power system, but also to power users. With the increasing development of the power industry, the ability to maintain frequency stability under large disturbances in the system is deteriorating. In order to prevent the frequency from falling sharply in the event of an accident and maintain the frequency stability of the system, low-frequency load shedding measures are adopted as the last step to ensure the safety of the power system. A line of defense to avoid a large number of vicious accidents, but the current low-frequency load shedding scheme of the low-frequency load shedding device does not fully consider the frequency regulation effect of the load, so there is still a problem of poor effect

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Embodiment Construction

[0060] The low-frequency load shedding device is composed of a sampling calculation module, a logic processing module and a monitoring module.

[0061] The sampling calculation module is responsible for AC data acquisition and calculation, and transfers the data to the logic processing module through dual-port RAM.

[0062] The logic processing module is mainly responsible for switch input (referred to as input), data exchange with the sampling calculation module and monitoring module, a small amount of calculation, logical judgment of control, switch output (referred to as output) and other functions.

[0063] The monitoring module is mainly responsible for the processing of the man-machine interface, external communication and other functions. This structure, taking advantage of the advantages of DSP's fast calculation speed, entrusts the heavy task of AC data collection and a large number of calculations to DSP, while the MCU of the logic processing module concentrates on c...

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Abstract

The invention discloses an under-frequency load shedding device and method. the under-frequency load shedding device is used for measuring the frequency, under-frequency load shedding is realized through specific circuit operation according to the relationship between load change and frequency adjustment, that is, the load shedding effect is gradually judged according to load sizes, significance and the like, and the optimal under-frequency load shedding effect is realized.

Description

technical field [0001] The invention relates to the technical field of power system stability control, in particular to a low-frequency load shedding device and method. Background technique [0002] Frequency is one of the power quality indicators. In today's highly developed power industry, maintaining frequency stability and ensuring power frequency quality is of great significance not only to the safe and stable operation of the power system, but also to power users. With the increasing development of the power industry, the ability to maintain frequency stability under large disturbances in the system is deteriorating. In order to prevent the frequency from falling sharply in the event of an accident and maintain the frequency stability of the system, low-frequency load shedding measures are adopted as the last step to ensure the safety of the power system. A line of defense can avoid a large number of vicious accidents, but the current low-frequency load shedding scheme...

Claims

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Application Information

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IPC IPC(8): H02J3/14
CPCY02B70/3225Y04S20/222
Inventor 高东学任永杰李翠红刘杰赵永刚承素芬
Owner LUOHE POWER SUPPLY OF HENAN ELECTRIC POWER CORP