Three-phase electric quantity calculation method and apparatus thereof
A technology of three-phase current and three-phase voltage, which is applied in the field of electric power, can solve the problems of low degree of intelligence of the power grid, wiring errors, and failure to correct in real time, and achieve the effect of high degree of intelligence
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Embodiment 1
[0054] This embodiment provides a three-phase electricity calculation method, which is completed by a three-element electric energy meter. The structure of the electric energy metering chip in the three-phase electric energy meter is as follows: Figure 5 (where, if Figure 5 The power metering sub-module and the electric energy metering sub-module in can be collectively referred to as the electric energy metering module) as shown, the hardware structure diagram of the wrong-phase correction sub-module is shown in image 3 As shown, the specific structure of the reverse correction sub-module is as follows Figure 4 as shown in image 3 As shown, voltage misphase correction is composed of three multiplexers 301, 302, 303 and U channel selection module 304; current misphase correction is composed of three multiplexers 305, 306, 307 and I channel selection module 308 composition. The voltage multiplexer 301, 302, 303 selects the voltage channel for metering, such as the voltag...
Embodiment 2
[0056] This embodiment provides a three-phase electricity calculation device, the device is as Image 6 shown, including:
[0057] The wrong connection detection module 61 is used to detect the angle and amplitude of the three-phase voltage and three-phase current, form a vector diagram according to the angle and amplitude of the three-phase voltage and three-phase current, and judge the three-phase electricity meter according to the vector diagram. wiring;
[0058] The error correction module 62 is used to adjust the wiring of the three-phase electric energy meter to the correct wiring according to the wiring when judging that the wiring is wrong,
[0059] The electric energy metering module 63 is used for measuring the electric energy of the three-phase electric energy meter;
[0060] Wrong connection detection module 61 specifically comprises:
[0061] Angle measurement sub-module 611, used to detect the angle of three-phase current and voltage;
[0062] The amplitude m...
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