Line protection fiber channel transmission data processing method and device
An optical fiber channel, data transmission technology, applied in emergency protection data processing devices, optical fiber transmission, emergency protection circuit devices, etc., can solve the problems of differential protection refusal, differential protection blocking, abnormal optical fiber communication, etc., to reduce the impact Effect
Active Publication Date: 2021-06-22
XUJI GRP +2
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[0003] However, during on-site operation, due to electromagnetic interference and other reasons, the abnormality of optical fiber communication may cause the differential protection to be blocked. In severe cases, the differential protection may refuse to operate when a fault occurs.
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[0069] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0070] figure 1 It is a schematic diagram of the high-voltage transmission line protection provided by the embodiment of the present invention.
[0071] figure 2 It is a flowchart of a method for processing line protection fiber channel transmission data provided by an embodiment of the present invention.
[0072] image 3 It is a logic diagram of a data processing method for line protection fiber channel transmissio...
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The invention discloses a line protection fiber channel transmission data processing method and device. The method comprises the following steps: acquiring a data frame format value in a communication message sent by an opposite side; when the numerical value is a first preset numerical value, enabling the devices on the two sides of the optical fiber channel to send sampling data and switching value data regularly after sampling interruption; when the numerical value is a second preset numerical value, sending the sampling data and the sampling serial number of the previous frame which are verified to be abnormal and the sampling data of the frame to an opposite side; when the numerical value is a third preset numerical value, carrying out phasor calculation on the sampling data of the 1 / 4 cycle before the abnormal frame, sending the real part and the imaginary part of the three-phase current and the corresponding sampling sequence number to the opposite side, and using the current phasors of the 1 / 4 cycle of the side and the opposite side for synthesizing differential current and braking current for differential protection. Sampled data are sent after sampling is interrupted, and when two times of continuous data exceptions are detected, a short window algorithm is used to calculate a phasor and transmit the phasor to an opposite side, so that the influence of accidental communication exceptions of an optical fiber channel on differential protection is reduced.
Description
technical field [0001] The invention relates to the technical field of high-voltage transmission line protection, in particular to a line protection optical fiber channel transmission data processing method and device. Background technique [0002] At this stage, the principle of optical fiber differential protection has been widely used in the protection of high-voltage power grid transmission lines in my country. Differential protection has the advantages of good selectivity and fast action speed, which plays an important role in protecting the safety of the power grid. [0003] However, during on-site operation, due to electromagnetic interference and other reasons, the abnormality of optical fiber communication may cause the differential protection to be blocked. In severe cases, the differential protection may refuse to operate when a fault occurs. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide a line protectio...
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IPC IPC(8): H02H7/26H02H1/00H04B10/032H04B10/25H04L1/00
CPCH02H7/261H02H7/263H02H1/0069H02H1/0092H04B10/032H04B10/25H04L1/0061Y04S40/124
Inventor 李旭李宝伟倪传坤董新涛方正唐艳梅姜自强郝慧贞都磊滕晨旭王振宇
Owner XUJI GRP