Test system and method for radio frequency electromagnetic field and radio immunity test of electric energy meter

Abstract

The invention discloses a radio frequency electromagnetic field and radio immunity test system for an electric energy meter, which includes a test host, a signal generator, an EMI receiver, a turntable antenna tower controller, and an electric energy meter verification device, wherein the test host is connected to the turntable through a router The antenna tower controller, the energy meter verification device is connected to the tested energy meter through the filter, the turntable antenna tower controller is connected to the turntable and antenna tower, the EMI receiver is connected to the RF switch and the stop band filter, and the RF switch and the stop band filter are connected at the same time The router and antenna, the signal generator is connected to the RF switch, and the RF switch is connected to the power amplifier. The invention utilizes the network synchronization technology to realize the synchronous recording of the radio frequency electromagnetic field immunity test and the error of the electric energy meter and the automatic test function integration of the multifunctional radio frequency electromagnetic field test and the radio interference suppression test, and can collect and analyze the monitoring data in real time, greatly reducing the The transportation inspection cost and inspection time effectively guarantee the accuracy of the test data.

Description

technical field [0001] The invention relates to a radio frequency electromagnetic field and radio immunity test system and method of an electric energy meter. Background technique [0002] In the power system, the power supply network is dense and complex, and the electromagnetic environment is complex. External factors such as switch operation, strong electric field, operation mode, power frequency magnetic field, lightning impact, and even faults will cause a large number of electromagnetic interference phenomena in the entire system, resulting in a large amount of electromagnetic interference in the power system power supply network. The accuracy, performance and other indicators of instruments and meters are affected and cannot operate normally, such as the malfunction of the microcomputer relay protection device, the loss of voltage of the electric energy meter, the error in the data transmission of the measurement and control device, and the out-of-control accident of t...

AI Technical Summary

Problems solved by technology

[0005] (1) In terms of system architecture, the existing radio frequency electromagnetic field test system and the electric energy meter verification system are independent and the radio frequency electromagnetic field immunity is a frequency sweep test, and the operator cannot manually and accurately record frequency points and error data at the same time;

[0006] (2) The test function is single, and once an error occurs, all tests must be restarted, which seriously reduces efficiency;

[0007] (3) For the small frequency range where the error of the electric energy meter is unqualified, the long-term test cannot be automated, and the sensitive frequency point cannot be found;

[0008] (4) There is no self-test function for each test, only one calibration is required to complete multiple tests, and it is uncertain whether the test conditions meet the requirements;

[0009] (5) Poor portability, unable to use after replacement of equipment or communication device;

[0010] (6) It is impossible to complete the verification work of the electric energy meter with a wireless module or a carrier module

Images