RF electromagnetic field and radio immunity test system and method of electric energy meter

Abstract

The invention discloses an RF electromagnetic field and radio immunity test system of an electric energy meter. The system comprises a tester body, a signal generator, an EMI receiver, a rotary table and antenna tower controller and an electric energy meter calibrating device, wherein the tester body is connected with the rotary table and antenna tower controller via a router, the electric energy meter calibrating device is connected to the tested electric energy meter via a filter, the rotary table and antenna tower controller is connected with a rotary table and an antenna tower, the EMI receiver is connected with an RF switch and a stop band filter, the RF switch and the stop band filter are connected with the router and the antenna simultaneously, the signal generator is connected with the RF switch, and the RF switch is connected with a power amplifier. Due to utilization of the network synchronization technology, immunity test of the RF electromagnetic field, synchronous recording of errors of the electric energy meter, multifunctional electromagnetic field test and RF interference suppression test are automatically integrated, monitoring data is collected and analyzed in real time, the operation and detection cost and the detection time are greatly reduced, and the accuracy of test data is effectively ensured.

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

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