An on-line monitoring system and method for clock out-of-synchronization of a secondary device
A secondary device and monitoring system technology, applied to clocks, clocks, and synchronization driven by synchronous motors, can solve problems such as clock out-of-step, simplify working procedures, improve time synchronization accuracy and stability, and improve power grid accidents. Analyze and stabilize the effects of controlled levels
Active Publication Date: 2019-04-12
NARI TECH CO LTD +1
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[0007] Purpose of the invention: In order to timely discover the problem of clock out-of-synchronization of secondary devices in substations, the present invention provides an online monitoring system for clock out-of-synchronization of secondary devices
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] from figure 1 It can be seen that the clock out-of-sync online monitoring system of the secondary device includes a GPS time-setting source device, a time-space node, a time-setting device, a monitoring host and an alarm device. Time device, described time-aligned device is connected to monitoring host by signal, and described monitoring host is used to receive the SOE signal sent by the time-aligning device; Receive SOE by the time mark and monitoring host of the SOE signal of each time-aligned device The difference of the absolute time of the signal time monitors whether the time synchronization device is out of sync. Calculate the difference between the time scale of the SOE signal of each time-synchronized device and the absolute time when the monitoring host receives the SOE signal, and judge the time-synchronized device correspond...
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The invention discloses a secondary device clock out-of-step online monitoring system and a secondary device clock out-of-step online monitoring method. The system comprises a GPS timing source device, a timing blank node, timed devices, a monitoring host, and an alarm device. The GPS timing source device sends a timing code. Each timed device receives the timing code and a hardware pulse timing signal emitted by the timing blank node, and emits an SOE signal and transmits the SOE signal to the monitoring host. A computer calculates the difference between the standard time of each SOE signal and the absolute time when the monitoring host receives the SOE signal. After the time differences of all the timed devices are obtained through comparison, the alarm is raised for the timed devices violating normal distribution. Through the system and the method, the problem that the clock of a secondary device of a substation is out of step can be found in a timely manner, the deviation of time can be calculated more accurately, the influence of network latency is eliminated, and the time synchronization accuracy and stability of the power system are improved.
Description
technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to an online monitoring system and method for clock out-of-sync of a secondary device. Background technique [0002] In recent years, with the rapid development of the national power system, the requirement for time synchronization has become increasingly urgent. Accurate, safe and reliable time sources are needed to provide accurate time references for various operating equipment in the power system. Especially with the advancement of the construction of smart substations, smart electronic equipment, merging units, PMUs, and administrative ranging devices have more urgent requirements for time synchronization. The improvement of time synchronization accuracy and stability is to improve line fault location, phasor and The key factors for the accuracy of power angle dynamic monitoring, unit and power grid parameter calibration are to improve the level of pow...
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IPC IPC(8): G04G7/00G04R20/02
CPCG04G7/00G04R20/02
Inventor 张传羽黄茂森朱臻赜
Owner NARI TECH CO LTD