Rapid detection method for AC voltage abnormity in electric power system

Abstract

The invention discloses a rapid detection method for AC voltage abnormity in an electric power system, and the method comprises the following steps: obtaining a sine AC voltage curve of the electric power system in a period, and calculating a preset voltage value of the electric power system based on the sine AC voltage curve; continuously sampling the sine alternating voltage for a plurality of times in a preset time to obtain a plurality of sampling voltage values; judging whether each sampling voltage value is abnormal or not based on a plurality of preset voltage values and a plurality of sampling voltage values within a preset time, and counting the abnormal times of the sampling voltage values; and detecting whether the sine alternating-current voltage is abnormal or not within a preset time based on the number of abnormal times of the sampling voltage value. Through sampling, operation and control of the DSP, the AC voltage abnormity in the power system can be rapidly detected, in the whole detection process, the DSP only needs to sample the voltage value, the circuit design and hardware equipment are simplified, and the anti-interference capability of detection can be significantly improved.

Description

technical field [0001] The invention relates to the field of AC voltage detection, in particular to a fast detection method for abnormal AC voltage in a power system. Background technique [0002] At present, the use of non-linear loads in power systems, especially power electronic devices, is increasing day by day. The application of various power electronic devices in power systems, industrial sectors and households is rapidly popularizing, making the pollution of the power grid increasingly serious. With the rapid development of science and technology and the increasing popularity of computer applications, electrical equipment has higher and higher requirements for the reliability of power supply. To ensure the reliability of power supply, it is necessary to ensure that the AC voltage can be quickly detected, otherwise it will cause the electrical equipment to crash, restart, or even be damaged. [0003] In the prior art, there are many methods for detecting abnormal AC ...

AI Technical Summary

Problems solved by technology

This method is simple in hardware implementation, but requires high precision in hardware parameters, poor anti-interference ability, and prone to misjudgment

In some cases, the abnormal fluctuations of the AC voltage are measured by the electric energy metering device. This method can only be manually screened by exporting the electric energy data excle file collected by the electric energy metering device, and when screening data, it is necessary to distinguish the wiring form of the electric energy metering device. In terms of method There are certain limitations, and the efficiency is low, the real-time performance is poor, and the sensitivity to the abnormal fluctuation detection of metering voltage is not high

Images