Method and system for metering performance comparison of electric energy metering devices
An electric energy metering device and technology for metering performance, applied in the direction of measuring devices, measuring electric variables, instruments, etc., can solve the problem of inability to detect accuracy differences, inability to provide reference basis for selection and evaluation of electric energy metering systems in distribution networks, and inability to detect Problems such as differences in the accuracy of different transformers
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Embodiment 1
[0029] Such as figure 1 As shown, the metering performance comparison system of an electric energy metering device in the present invention includes a calculation test device and a signal conversion device, and the calculation test device is electrically connected to the signal conversion device,
[0030] The signal conversion device receives multiple sets of measured three-phase current and voltage transformers and a set of reference three-phase voltage and current transformers secondary output signals, and converts the output signals into analog signals;
[0031] Receive the electric energy output signals of multiple groups of tested electric energy metering devices and one group of reference electric energy metering devices and convert them into analog signals; receive the control signals sent by the computing and testing devices, and transmit the converted analog signals to the computing and testing devices;
[0032] The calculation and testing device includes an acquisiti...
Embodiment 2
[0041] A method for comparing measurement performance of electric energy metering devices in the present invention, the secondary output signals of multiple groups of three-phase voltage and current sensors and the secondary output signals of one group of reference three-phase voltage and current transformers are converted into analog signals by a signal conversion device, After the analog signal is transmitted to the acquisition card, it is then transmitted to the industrial computer for comparison and analysis between the analog signal and the reference signal, and the analysis results are uploaded and displayed.
[0042] The acquisition card sends a signal to collect the metering performance of the electric energy metering device, and the signal conversion device converts the received electric energy output signals of multiple sets of measured electric energy metering devices and one set of reference electric energy metering device into analog signals, and transmits them to t...
Embodiment 3
[0044] The measurement performance of six groups of electric energy metering devices in the distribution network is used as the comparison object to illustrate the operation:
[0045]The acquisition card sends out control signals for collecting the electric energy of six groups of electric energy metering devices, and the signal conversion device receives the signals, and receives the electric energy output signals of six groups of electric energy metering devices and one group of reference signals, and the signal conversion device converts the received signals at the same time It is a 42-way analog signal, which is transmitted to the acquisition card. The acquisition card converts the signal and transmits it to the data processing module MSP430F1611 of the industrial computer of the calculation and testing device. In the method of group energy metering, it is closest to the reference value, etc., and conduct statistical analysis and comparison of the electric energy meters of ...
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