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A method for improving the accuracy of PTP time synchronization in smart substations

A smart substation and precision technology, which is applied in the direction of electrical components, circuit devices, information technology support systems, etc., can solve problems such as abnormal timing events, large time delay and jitter, and fluctuations in the correction domain, so as to improve timing accuracy and reduce Link delay and jitter, the effect of simple engineering implementation

Active Publication Date: 2022-04-29
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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Problems solved by technology

However, because the star structure is often used in the process layer network of smart substations, sometimes multi-level cascading occurs, and the clock message is forwarded down through the switch through multicasting. Even in the P2P mode, there are still delays and jitters Big problem, the correction field in the follow_up message forwarded by the switch received by the merging unit or the smart terminal fluctuates greatly, which may trigger an abnormal time synchronization event of the slave clock

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  • A method for improving the accuracy of PTP time synchronization in smart substations
  • A method for improving the accuracy of PTP time synchronization in smart substations

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[0034] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0035] The invention provides a method for improving the PTP timing accuracy of an intelligent substation, the method comprising the following steps:

[0036] 1. The clock mode of the 1588 switch at the process layer is configured as P2P mode.

[0037] Such as figure 2 As shown, the smart substation is structurally divided into station control layer equipment, bay layer equipment, process layer equipment, station control layer network and process layer network, and functionally divided into process layer and station control layer:

[0038] The station control layer equipment and the interval layer perform information transmission through Ethernet, and the interval layer equipment communicates with the process layer equipment through optical cables;

[0039] The interval layer device bri...

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Abstract

The invention discloses a method for improving the PTP time synchronization accuracy of an intelligent substation. The method includes: configuring the switch to the P2P mode of the IEEE1588 protocol; selecting a network split point; modifying the attributes of the switch on both sides of the split point; IV. The network is respectively connected to the clock source; the present invention provides a 1588 segmentation method, so that a string of switches can be divided into multiple sections, modify the properties of the cascaded ports of the switches at the segmentation point, limit the forwarding of clock messages, and then divide each Adding a clock source to the segment network reduces the number of cascaded switches in each network, thereby greatly reducing link delay and jitter, and greatly increasing the reliability and accuracy of network time synchronization.

Description

technical field [0001] The invention relates to the field of clock synchronization of intelligent substations, in particular to a method for improving the PTP time synchronization accuracy of intelligent substations. Background technique [0002] Substation, a place where voltage is changed. In order to transmit the electric energy from the power plant to a distant place, the voltage must be raised to become high-voltage electricity, and then the voltage is lowered as needed near the user. This work of raising and lowering the voltage is done by the substation. The main equipment of substations are switches and transformers. According to the size, the small ones are called substations. A substation is larger than a substation. Substation: generally a step-down substation with a voltage level below 110KV; substation: including "boost and step-down" substations of various voltage levels. [0003] A substation is a power facility in the power system that transforms voltage,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
CPCH02J13/0006H02J13/0062Y04S10/16Y02E60/00
Inventor 王向群黄在朝李炳林郭经红吴军民陈磊卜宪德张浩姚启桂邓辉王玮沈文陶静陈伟张增华喻强虞跃孙晓艳刘川张明华吕立冬田文锋姚继明
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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