Adaptive adjustment method for regional networked protection running status
A technology of self-adaptive adjustment and operation state, applied in electrical components, circuit devices, etc., it can solve the problems that the hardware processing capacity cannot be improved infinitely, the scale of the regional power grid is continuously expanded, and the protection performance is not reduced, and achieves strong self-adaptability and reliability. Expansion effect
Active Publication Date: 2013-02-06
XJ ELECTRIC +2
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[0004] The purpose of the present invention is to provide a method for self-adaptive adjustment of the operating state of regional network protection to solve the problems of the continuous expansion of the regional power grid and the inability to increase the hardware processing capacity indefinitely without reducing the protection performance
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[0018] The operating status of each sub-unit is divided into multiple priority levels, from low to high, it is sleep, normal operation, fault operation, and fault discrimination; sleep means that the sub-unit is not currently in operation, and only needs regular (such as 10 seconds) inspection operation Information (such as relevant circuit breaker, knife switch position information, current information, etc.); normal operation means that the sub-unit has been running in the system, and needs to measure the current at a high frequency (such as 1 second) to judge the operating status; faulty operation means that the sub-unit The unit has already sensed the fault, and needs to perform fault calculation frequently (such as 10ms) to solve the situation that the fault point develops into the protection range of the sub-unit when the developing fault occurs; the fault discrimination state is expressed as the sub-unit closest to the fault point in the area, where One must be judged to...
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The invention relates to an adaptive adjustment method for a regional networked protection running status. The method comprises the following steps: dividing the running status of each logic subcell into sleeping, normal running, fault running and fault discrimination; setting each logic subcell as the sleeping status in an initial running; collecting information of positions and magnitudes of currents of each breaker and a corresponding disconnecting link; judging and setting a running status of each logic subcell according to the collected information; adjusting frequencies and calculating tasks according to each running status; and directly adjusting a setting status into an actual running status when a logic module for discriminating a running priority status judges that the actual running status of the cell is not consistent with the setting status. According to the invention, the execution priority of the subcell is determined and adjusted in real time by the running status of each logic subcell, so that enough running time resources for the logic subcells associated with a fault point are ensured. In addition, a requirement for the running performance of a protection device can be reduced by limiting the number of the logic subcells occupying lots of time resources.
Description
technical field [0001] The invention belongs to the technical field of electric power system relay protection, and relates to a self-adaptive adjustment method for operating states applied to centralized network protection of regional power grids. Background technique [0002] With the development of digital communication technology and the popularization and application of substation standard modeling, it is possible to set relay protection for regional networks rather than specific physical models. In the regional networked relay protection system, the information of multiple measurement points can be easily obtained by means of a high-performance, relatively independent communication system, which can not only complete the differential protection function for a single independent electrical component, but also realize the differential protection for multiple The differential protection function of the area composed of independent electrical components provides a current d...
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Inventor 胡叶宾倪传坤杨恢宏王智勇张新萍邓茂军姚东晓王莉陶冶赵晓铎
Owner XJ ELECTRIC