Intelligent substation protection operation time delay optimization method and device
A smart substation and protection action technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem of slow time and other problems, and achieve the effect of improving the action time and meeting the requirements of sensitivity and quickness
Active Publication Date: 2019-01-11
XUJI GRP +4
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[0005] The purpose of the present invention is to provide a smart substation protection action delay optimization method and device to solve the problem that the whole group action time of the smart substation is slower than that of the traditional substation
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[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0025] Method embodiment
[0026] The method of the present invention is mainly applied to the protection device and the process layer device of the smart grid. The wiring diagram of the secondary circuit of the protection device is as follows: figure 1 shown. Optical fiber point-to-point sampling is adopted between the protection device and the merging unit, and the communication protocol adopts DL / T 860.92; the optical fiber point-to-point tripping between the protection device and the intelligent terminal is adopted, and the communication protocol adopts DL / T 860.81.
[0027] The whole process is as follows: the sampling circuit in the merging unit collects the sampled data such as voltage and current in the line, and frames the sampled data...
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The invention relates to an intelligent substation protection operation time delay optimization method and device. Firstly, an SV message sent by a merging unit is received and the rated time delay data in the SV message is obtained. Wherein the rated delay data is the time difference between the time when the sampling data is generated and the time when the merging unit sends the rated delay data. Then, the ratio of the obtained rated delay data to the time interval of the output point is calculated and rounded to obtain the integer number of the delay points. Then subtracting the number of delay points from the sequence number of the sampling data reception time to obtain the generation time of the sampling data; Finally, the time of sample data generation is used for interpolation synchronization calculation. The invention realizes the synchronization of sampling data of channels with different analog quantities, finally achieves the purpose of lifting the whole set of operation time of the protection, and meets the requirements of sensitivity and rapidity of the relay protection.
Description
technical field [0001] The invention belongs to the technical field of power relay protection, and in particular relates to a method and device for optimizing the protection action time delay of an intelligent substation. Background technique [0002] Smart substation is an important part of smart grid construction. It is one of the important platforms for realizing various energy conversion and control, and it is also a key part of realizing various new energy power generation and connecting to the grid. Smart substations can not only fulfill the requirements of smart grid informatization, automation and interaction in terms of technology and function, but also connect the six key links of smart grid: power generation, transmission, transformation, distribution, power consumption and dispatch. [0003] Relay protection, as the first line of safety defense of the power system, plays a very important role in ensuring the safe operation of the system, and makes an important co...
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CPCH02H7/22
Inventor 邓茂军倪传坤李宝伟谷君闻宇马和科李旭李文正闫志辉赵应兵王晓锋王智勇
Owner XUJI GRP