Study on the Influence of Radio Anechoic Chamber Filter Circuit on the Smart Meter Error in Radio Frequency Immunity Test

In order to solve the problem that the smart meter cannot carry out the experiment of radio frequency immunity in the general type of Radio Anechoic Chamber, a virtual load test system filter for smart meters is designed in this paper, which solves the influence on the accuracy caused by electromagnetic leakage through input and output test lines. Based on the filter parameters and the actual measured voltage data of the smart meter, a reactance compensation circuit is designed into the test circuit to solve the problem that the smart meter errors is out of tolerance before radio-frequency radiation immunity test. Finally, the validity of this method is verified by comparing the test data of different specfications of smart meters. The test results show that the introduction of the filters and compensation circuits ensure the basic error of the tested smart meter before conducting the radio-frequency radiation immunity test, and solve the problem that the radiation electromagnetic compatibility test of the smart meter cannot be carried out according to the standard requirements in the general type of Radio Anechoic Chamber.