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A method of judging small current variables with apparent power

A small current and power technology, applied in the direction of apparent power measurement, measurement of electrical variables, electrical devices, etc., to avoid waste of raw materials, reduce omissions, and reduce losses

Active Publication Date: 2021-08-10
山东计保电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that technologies such as leakage protectors and low-current grounding can no longer meet the needs of power grid development. It is urgent to develop a new detection technology that can actively find problems to avoid disorderly power outages, achieve safe and energy-saving production, and reduce waste.

Method used

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  • A method of judging small current variables with apparent power
  • A method of judging small current variables with apparent power
  • A method of judging small current variables with apparent power

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] The gist of the present invention is to use a current detection device to detect the current on the ground wire of the equipment, the zero-sequence current line or the ground lead of the insulation part, and multiply the detected current by a given apparent voltage to form an apparent voltage. Power, accumulate the apparent power to obtain the apparent power, and then read the apparent power every interval of the same length of time to see the amount of change in the apparent power in the same period, if the apparent power changes in each time period The magnitude of the change is not large, and it is basically in a stable state, which means that the detected destructive energy has not changed significantly. Continue to maintain the above time interval to read the apparent power and check the change of the apparent power; if the...

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Abstract

The invention discloses a method for judging small current variables by using apparent power, belonging to the technical field of electromagnetic measurement. Determine the apparent voltage to obtain the apparent power; S3: Accumulate the apparent power obtained in S2 in real time to obtain the apparent power; S4: Read the apparent power in S3 once every interval time T, and calculate the apparent power in For the change in each time period, the relative change range of the apparent power change in two adjacent time periods is compared, and a decision to continue detection or reporting is made according to the relative change range. This evaluation method automatically judges the change trend of the damage energy in the line according to the change range of the apparent power in the adjacent same length period, grasps its development trend, gives an early warning signal when the increase range is large, and reminds the staff to take security checks. Measures to ensure safe production, avoid waste of raw materials and reduce losses.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic measurement, and in particular relates to a method for judging small current variables by using apparent power. Background technique [0002] Since the end of the 1960s, in order to strengthen the safety of electricity use, my country has gradually adopted protection measures in the power system, among which the leakage protector is a general technical means. The leakage protector detects the abnormal current or voltage signal of the monitoring equipment or the circuit. When the detected signal reaches its set threshold, it prompts the actuator to act to cut off the power supply, so as to avoid accidents such as burning out electrical appliances, fire or electric shock, so as to ensure personal safety and health. To ensure the safety of electrical equipment and achieve the purpose of protection. [0003] Later, some adopted the low-current grounding method, which installed a zero-sequence...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R21/00G01R21/06G01R22/06G01R19/00G01R31/52G01R31/12G01R31/08
CPCG01R19/0092G01R21/005G01R21/06G01R22/06G01R31/085G01R31/1272
Inventor 荣潇荣博张海静王伟杨冬晓杨剑郭亮宋增祥宋淄琳
Owner 山东计保电气有限公司
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