Polarity Test Method of Relay Protection Transformer Based on Power System Topology Identification
A polarity test, power system technology, applied in electrical winding test, transformer test and other directions, can solve the problems of operating state requirements, redundant steps, error-prone, etc., to achieve high reliability and universality, and improve the degree of automation , easy to achieve effect
Active Publication Date: 2022-03-11
CHINA SOUTHERN POWER GRID COMPANY +1
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[0010] In view of the above defects of the prior art and the requirements of the relay protection verification regulations, the present invention provides a polarity test method for relay protection transformers based on power system topology identification. Problems such as complex process, requirements on operating status, repeated operation of circuit breaker, redundant steps, and easy omissions solve the problem of huge workload and error-prone manual determination of measurable transformers
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[0035] 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 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, not to limit the present invention.
[0036] Such as figure 1 Shown is a schematic flow chart of a polarity test method for relay protection transformers based on power system topology identification provided by an embodiment of the present invention. figure 2 A test example is listed. In order to avoid ambiguity, the related concepts are defined as follows:
[0037] Array: A collection variable that stores objects of the same type. The outer elements are represented by square brackets, and the inner elements are separated by commas. For example, an array Nodes used to store nodes contains three nodes 1, 2, and 3, which can be expre...
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The invention discloses a polarity testing method of a relay protection transformer based on power system topology identification. The present invention judges the transformer set that can be tested under the current power grid operation state based on the topology identification of the power system; according to the above-mentioned determined transformer set, the polarity test of the relay protection transformer is carried out in combination with the power grid topology. The invention quickly and reliably screens out the transformers that can be tested for polarity under the current operating state through the acquisition and identification technology of the topology information of the power grid, and implements the polarity test on them, thereby improving the automation degree and efficiency of the polarity test of the transformers, It is easy to realize, and has high reliability and universality.
Description
technical field [0001] The invention belongs to the field of power system operation, and more specifically relates to a polarity test method for relay protection transformers based on power system topology identification. [0002] technical background [0003] Relay protection is the first line of defense for the safe operation of the power grid. The main protection and switch refusal to operate can lead to failures that cannot be removed quickly and cause system stability damage. The risk is the largest risk in the power grid. Ensuring the normal operation of relay protection devices and circuits is the prerequisite for ensuring the safe and stable operation of the power grid. [0004] The transformer acts as the voltage and current isolation function of the primary and secondary circuits in the secondary circuit of relay protection, and their primary and secondary sides have two or more lead-out terminals. Wrong use of the lead-out terminals on any side will cause the phas...
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IPC IPC(8): G01R31/72G01R31/62
Inventor 郑茂然盛志文张弛陈朝晖张静伟李捷周红阳李银红
Owner CHINA SOUTHERN POWER GRID COMPANY