Device and method for measuring initial phase angle of electric power metering equipment based on positioning time service, and electric power metering equipment

By adopting a preliminary phase angle measurement device based on positioning timing in the power metering equipment, the problem of phase angle synchronization in the measurement time domain of multiple equipment is solved, and the measurement accuracy of power simulation data is improved.

CN119689086APending Publication Date: 2025-03-25ZHENGZHOU WONDER ELECTRICAL POWER
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Patent Information

Application Number
CN202411800772.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In power metering, when multiple devices measure signals at different measurement points, synchronous measurement of time domain phase angles cannot be guaranteed, resulting in low measurement accuracy of power simulation data.

Method used

The initial phase angle measurement device of the power metering device based on positioning timing is adopted. The device generates a PPS second pulse interrupt signal through the positioning timing module, triggers the counter to count the standard frequency signal, record the number of standard frequencies between the zero-crossing interrupt signals, and calculates the initial phase angle.

Benefits of technology

By ensuring that all devices have the same initial time when calculating the initial phase angle, synchronous measurement of the time domain phase angle is achieved, and the measurement accuracy of power simulation data is improved.

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Abstract

The invention provides an electric power metering equipment initial phase angle measuring device based on positioning time service, and the device comprises a positioning time service module which is used for triggering and generating a PPS second pulse interruption signal after the time synchronization succeeds; the high-stability crystal oscillator is used for outputting a standard frequency signal; the ADE circuit is used for generating a zero-crossing interrupt signal when the waveform of each analog signal crosses a zero point; the measurement mainboard MCU comprises a counter, an interrupt 1 and an interrupt 2, and the interrupt 1 is connected with the positioning time service module and used for receiving a PPS (pulse per second) interrupt signal output by the positioning time service module; the interrupt 2 is connected with the ADE circuit and is used for receiving a zero-crossing interrupt signal; the measurement mainboard MCU is used for triggering the counter to count the standard frequency signals after receiving the PPS second pulse interrupt signals, and calculating the initial phase angle according to the standard frequency count between the first PPS second pulse interrupt signal and the first zero-crossing interrupt signal and the standard frequency count between the two zero-crossing interrupt signals.
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