Monitor small currents with apparent power and deal with them in real time

Abstract

The invention discloses a method of using apparent power to monitor a small current and dispose of it in real time, which belongs to the technical field of electromagnetic measurement, and comprises the steps of S1: detecting the tiny current on the line; S2: collecting the current detected by S1, and then multiplying it by The given apparent voltage is 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 every interval T, and calculate the apparent power in The change in each time period is compared with the relative change range of the apparent power change in two adjacent time periods, and a decision to continue detection or report to the host is made based on the relative change range. This method judges the change trend of the destructive energy in the line according to the change range of the apparent power in two adjacent periods of the same length, grasps its development trend, and gives an early warning signal when the increase range is large, reminding the staff to take security measures , avoid waste of raw materials caused by power outages, and ensure safe production.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic measurement, and in particular relates to a method for monitoring small current with apparent power and treating it in real time. 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 also adopted the method of small current grounding, whi...

AI Technical Summary

Problems solved by technology

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

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