Method and system for recognizing vicious load

Abstract

The invention relates to a method and system for recognizing a vicious load. The method comprises the steps that active power values and apparent power values of integer second moments in a preset cycle of a power network are acquired; active power vectors and apparent power vectors in the preset cycle are calculated according to the active power values and the apparent power values of the integer second moments in the preset cycle; when the preset cycle is powered on for the first time and the circulating time is longer than or equal to a preset cycle value or the preset cycle is not powered on for the first time, whether or not the sum of the active power vectors in the preset cycle is larger than a preset threshold value is judged; when the sum of the active power vectors in the preset cycle is larger than the preset threshold value, a power factor value in the preset cycle is calculated according to the sum of the active power vectors and the sum of the apparent power vectors in the preset cycle; whether the power factor value is larger than a preset threshold value or not is judged; if yes, an active power value of a next integer second moment after the preset cycle is acquired, and when the active power value of the next integer second moment after the preset cycle is larger than a preset threshold value, a result recognizing the vicious load is output. The accuracy rate and the reliability are high.

Description

technical field [0001] The invention relates to the fields of load identification and electricity safety, in particular to a method and system for identifying vicious loads. Background technique [0002] At present, fire accidents occur frequently in college apartments. Most of these accidents originate from the illegal use of high-power vicious loads such as fast heating and electric furnaces by students. Therefore, in order to ensure the safety of school electricity use, the identification and judgment of vicious loads are proposed. , Under the premise of ensuring the safe use of electricity for students, limit the use of high-power electrical appliances such as fast heating and electric stoves. [0003] The traditional methods for identifying vicious loads include power factor method, instantaneous power method, and area relationship judgment method, etc., but these methods can only judge the instantaneous value at a certain moment. The misjudgment rate of judging the na...

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Problems solved by technology

[0002] At present, fire accidents occur frequently in college apartments. Most of these accidents originate from the illegal use of high-power vicious loads such as fast heating and electric furnaces by students. Therefore, in order to ensure the safety of school electricity use, the identification and judgment of vicious loads are proposed. Under the premise of ensuring students' safe use of electricity, limit the use of some high-power electrical appliances such as electric stoves that heat up quickly

[0003] The traditional methods for identifying vicious loads include power factor method, instantaneous power method, and area relationship judgment method, etc., but these methods can only judge the instantaneous value at a certain moment. The misjudgment rate of judging the nature of the load will be particularly high. Therefore, the traditional method of identifying malignant loads has low reliability

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