Three-phase energy metering module and its calibration method
A technology of electric energy measurement and three-phase electricity, which is applied in the measurement of electrical variables, measurement devices, measurement time integration, etc.
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Embodiment 1
[0024] In Embodiment 1 of the present invention, a three-phase electric energy metering module is provided, specifically, figure 1 An optional structural block diagram of the three-phase electric energy metering module is shown, as figure 1 As shown, the three-phase electric energy metering module may include: a three-phase electric input channel 11; a three-phase electric calculation channel 12; a multi-way selector switch 13; and a controller 14; Realize the connection of different combinations of three-phase electrical input channels and three-phase electrical calculation channels.
[0025] During specific implementation, the three-phase electrical input terminals include three-phase current input terminals and / or three-phase voltage input terminals; correspondingly, the three-phase electrical calculation channels include three-phase current calculation channels and / or three-phase voltage calculation channels. That is to say, the three-phase electric energy metering module...
Embodiment 2
[0029] In this embodiment, a method for performing voltage calibration of the above-mentioned three-phase electric energy metering module is provided, specifically, image 3 An alternative flowchart showing the method, such as image 3 As shown, the method includes the following steps S301-S305:
[0030] S301, controlling the multiplex switch to be in a first open state, wherein, in the first open state, the three-phase electrical input channels are connected one-to-one with the corresponding three-phase electrical calculation channels;
[0031] S302, calculating the voltage value output by each channel in the three-phase electricity calculation channel;
[0032] S303, according to the calculated voltage value output by each channel in the three-phase electrical calculation channel, determine whether there is a voltage calculation channel with deviation;
[0033] S304. When it is determined that there is a voltage calculation channel with deviation, determine the voltage cal...
Embodiment 3
[0039] In this embodiment, a method for current calibration of the above-mentioned three-phase electric energy metering module is provided, specifically, Figure 4 An alternative flowchart showing the method, such as Figure 4 As shown, the method includes the following steps S401-S405:
[0040] S401. Control the multiplexer switch to be in the first open state, wherein, in the first open state, the three-phase electrical input channel is in one-to-one communication with the corresponding three-phase electrical calculation channel;
[0041] S402, calculating the current value output by each channel in the three-phase electricity calculation channel;
[0042] S403, according to the current value output by each channel in the calculated three-phase electrical calculation channel, determine whether there is a current calculation channel with deviation;
[0043] S404. When it is determined that there is a current calculation channel with deviation, determine the current calculat...
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