Synchronization method, device, plant and topology structure of wide area system protection device
A system protection and wide-area technology, applied in the field of power systems, can solve problems such as high cost, impracticality, and loss of global clock synchronization, and achieve the effect of saving production costs
Active Publication Date: 2021-02-12
JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology
However, once the GPS method loses the GPS in some plants, the global clock synchronization function will be lost, and the related system protection control function will be blocked; the SDH method needs to follow the IEEE-1588 time synchronization protocol , equipped with a dedicated switch that supports SDH transmission and a time synchronization device that supports the IEEE-1588 protocol, which is expensive and impractical
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[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0057] It should be noted that the terms "system" and "network" in this disclosure are often used interchangeably herein. The "and / or" mentioned in the embodiments of the present invention means "including any and all combinations of one or more related listed items. The term "first" in the specification, claims and drawings of the present invention , "second", etc. are used to distinguish different objects, not to limit a specific order.
[0058] It should also be noted that the following embodiments of the pres...
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The invention discloses a synchronization method, device, plant station and topology structure of a wide area system protection device. The method includes: the first plant station sends a first data frame to the second plant station, the first data frame at least includes the sequence number p of the first data frame, and the sending time stamp T of the first data frame st[p] ; Receive the second data frame sent by the second factory station, and record the receiving time stamp T of the second data frame sr[q] , the second data frame includes the sequence number q of the second data frame, and the sending timestamp T of the second data frame mt[q] and the receiving timestamp T of the first data frame mr[p] , the first data frame and the second data frame are adjacent on the second factory station; calculate the time phase difference Δs and crystal oscillator frequency deviation Δf between the first factory station and the second factory station p ; Adjust the time of the first factory station, and adjust the clock frequency of the first factory station. The technical solution disclosed by the invention can realize wide-area time synchronization of the system protection device without changing the physical structure and channel configuration of the existing system protection device.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of power systems, and in particular to a synchronization method, device, plant and topology of a wide area system protection device. Background technique [0002] The wide-area system protection device is a control device installed in the power plant or substation to ensure the stability of the power system when it encounters a large disturbance, so as to realize machine cut, load shed, rapid output reduction, DC power emergency boost or return The downgrading function is an important facility to maintain the safe and stable operation of the power system. The network topology of wide-area system protection devices is usually composed of two or more power stations connected through communication, so as to realize regional or larger-scale power system stability control. Therefore, in order to avoid oscillation problems in different frequency bands of the power grid and to facilitate proc...
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IPC IPC(8): H04J3/06
CPCH04J3/065H04W56/001G01S19/37H03L7/06H04L7/0008H04L7/0041
Inventor 尹积军陈庆吴争陆晓罗建裕李海峰李雪明张莉薛峰罗凯明刘林颜云松任建锋夏海峰
Owner JIANGSU ELECTRIC POWER CO