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Robust control system and method for electric time synchronization system

A time synchronization system and robust control technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve problems affecting the reliability of system time signals and lack of monitoring of internal devices in time synchronization systems , to achieve the effect of ensuring reliability, ensuring safety and reliability, and improving safety

Active Publication Date: 2017-05-31
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently a lack of monitoring of the internal devices of the time synchronization system during the application process. When the time synchronization of a certain device is abnormal, it will affect the reliability of the system output time signal

Method used

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  • Robust control system and method for electric time synchronization system
  • Robust control system and method for electric time synchronization system
  • Robust control system and method for electric time synchronization system

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Embodiment 1

[0039] The present invention proposes a robust control system for a power time synchronization system and its implementation method. This method starts from the signal source of the time synchronization system, and by introducing multiple external time sources and judging the signal security of the input time source, Eliminate interference from external unstable signals or maliciously tampered input time source signals, so as to select the most reliable time source as the synchronization time source of the master clock device to ensure the reliability of the time source signal of the master clock device; on the other hand, through robust The control realizes the closed loop of the time synchronization system. The main clock device uses the optical port wavelength division multiplexing technology to monitor each device of the time synchronization system, and timely finds the clock device with abnormal time synchronization and adjusts it, so as to ensure the safety and reliability...

Embodiment 2

[0046] The present invention also provides a method for realizing the robust control system of the power time synchronization system. The closed-loop design and realization of the time synchronization system based on the robust control includes:

[0047] Step 1: A time synchronization system using dual master clock devices;

[0048] Step 2: The slave clock device receives safe and reliable signals, and the dual master clock devices receive external time source signals and complete synchronization;

[0049] Step 3: The master clock device monitors the output signals of each device in the time synchronization system to determine the faulty device;

[0050] Step 4: Determine the time offset of the output signal of the time synchronization system and the master clock device.

[0051] Master clock 1 and master clock 2 are connected to each other through optical fiber to obtain the time synchronization deviation, and synchronize information through the network. Master clock 1 and m...

Embodiment 3

[0059] Figure 4 It is a typical application example of the smart substation time synchronization system. The main clock 1 and the main clock 2 are mutually standby. The main clock 1 provides the time synchronization signal for the station control layer equipment, and the slave clock receives the IRIG-B signal output by the main clock 1 and the main clock 2. And after the synchronization is completed, it provides a time synchronization signal for the measurement and control device and the protection device.

[0060] The present invention can be applied to the design of the time synchronization system in the intelligent substation, and the application schematic diagram is as follows Figure 4shown. The master clock device is deployed at the station control layer, and adopts a dual master clock configuration, in which the master clock 1 is the master clock, and the master clock 2 is the backup clock, and the communication of the dual master clocks is realized by associating the...

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Abstract

The invention relates to a robust control system and a robust control method for an electric time synchronization system. The time synchronization system comprises at least two master clock devices and a slave clock device, wherein the master clock devices are interconnected via an optical fiber; the master clock devices are interconnected with the slave clock device via the optical fiber; the time synchronization system receives an external time source signal via the master clock devices, so that safety and reliability of time source selection of the master clock devices can be ensured by ensuring the safety and reliability of the external time source signal; each master clock device is composed of a clock receiving unit, a clock unit and an output unit connected in sequence; and the time synchronization system is provided with a reliability judging module on the clock receiving unit and the clock unit.According to the system and the method provided by the invention, beginning with signal sources of the time synchronization system, signal security of the input time source is judged by introducing the plurality of external time sources, interference of the external instable signal and malicious tampering of the input time source signal are completely eradicated, and thus the most reliable time source is selected to serve as the synchronization time source of the master clock devices, and reliability of the time source signal of the master clock devices is ensured.

Description

technical field [0001] The invention relates to the technical field of automation equipment testing, in particular to a system and method for robust control of a power time synchronization system. Background technique [0002] Dispatching agencies at all levels of the power grid, power plants, substations, centralized control centers, etc. all need a unified and accurate time base to meet the needs of various systems (such as dispatch automation systems, energy management systems, production information management systems, monitoring systems) and equipment ( Such as relay protection device, intelligent electronic equipment, time sequence recording SOE, plant automatic control equipment, safety and stability control device, fault filter) for time synchronization requirements, to ensure the consistency of real-time data collection time, improve line fault location, The accuracy of phasor and power angle dynamic measurement, unit and grid parameter verification can improve the ...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0644H04J3/0658
Inventor 张金虎杨威李劲松雷康王化鹏李睿宜张海燕
Owner CHINA ELECTRIC POWER RES INST
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