PMU synchronized clock system added by dynamic compensation

A technology of synchronous clock and dynamic error, applied to clocks driven by synchronous motors, synchronous, electromechanical clocks, etc., can solve the problems of poor reliability and limited adjustment accuracy of devices, and achieve the goal of improving clock accuracy and ensuring reliability. Effect

Inactive Publication Date: 2009-10-07
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] After searching the existing technical literature, it is found that the Chinese invention patent (application number 200520046579.1) proposes an adaptive PMU satellite synchronous clock watch device, but the adjustment accuracy of the device is limited, and the reliability is not good

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  • PMU synchronized clock system added by dynamic compensation

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Embodiment Construction

[0013] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0014] Such as figure 1 As shown, this embodiment includes a GPS module, a crystal oscillator clock module, a microprocessor and a dynamic error processing system. Among them, the GPS module sends the output RS-232 data frame to the microprocessor, and sends the second pulse 1PP signal to the dynamic error processing system; the crystal oscillator clock module uses a high-stability crystal oscillator as the clock source, and sends the output second pulse signal To the dynamic error processing system; the dynamic error processing system judges and processes the received second pulse 1P...

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Abstract

The invention relates to a PMU synchronized clock system added by dynamic compensation belonging to the electric power system monitoring and controlling technology field, which comprises a GPS module, a crystal oscillator clock module, a microprocessor and a dynamic error processing system. Wherein, the GPS module sends the outputted data frame to the microprocessor, and sends second pulse signal to the dynamic error processing system; the crystal oscillator clock module sends the outputted second pulse signal to the dynamic error processing system; the dynamic error processing system performs judging and error processing to the second pulse signals; the microprocessor receives the RS-232 data frame from the GPS module, processes the serial outputted time message in real time and sends it to the PMU sampling system, receives the signal from the dynamic error processing system at the same time, and adjusting the signal correspondingly. The invention improves the clock precision, and can work normally and guarantee the phase angle measuring measurement error in the predetermined range even under the satellite losing lock or satellite experiment jumping condition, thereby, guarantees the system reliability.

Description

technical field [0001] The invention relates to a clock system in the technical field of detection and control, in particular to a PMU (synchronous phasor measurement unit) synchronous clock system with dynamic compensation added. Background technique [0002] For many years, the wide area monitoring WAMS (Wide Area Monitoring System) system with the synchrophasor measurement unit PMU (Phasor Measurement Unit) as the application mark has obtained different types of pilot applications in the power grid. With the development of modern large power grid technology, The research on the dynamic monitoring and control system of power grid based on PMU has become a hot spot in the field of real-time dynamic security analysis and control technology of power grid. The PMU applies the real-time off-site synchronous measurement technology of the grid phasor. With the emergence of GPS (Global Positioning System, global satellite positioning system), the leading time error of the second ...

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Application Information

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IPC IPC(8): G04G7/00G01R25/08G01S5/02G05B19/04
Inventor 严正李丽王兴志苏广宁李禹鹏
Owner SHANGHAI JIAO TONG UNIV
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