Logic Optimization of Optical Fiber Differential Protection for SDH Bearing Distribution Network Lines Based on Reliability Measurement
There is a deviation in the distribution of nodes in the SDH carrying distribution network,hence,it is difficult to a-chieve node interoperability during allocation,which leads to a significant impact on the distribution network fiber distribution and prevent differential protection of distribution network lines in a timely manner.In order to improve the real-time perform-ance of fiber optic differential protection for SDH bearing distribution network lines,designed a logic optimization method for fiber optic differential protection of SDH carrying distribution network lines under reliability metrics.Under the orthogonal re-lationship of layering and segmentation,the transmission structure of SDH carrying distribution network optical fibers is divid-ed in vertical and horizontal directions,which forms a circuit layer,channel layer,and transmission medium layer.Differential protection criteria are defined based on full current mode and fault component mode,and the sensitivity of fiber optic differential protection for distribution network lines increases by setting differential protection settings.Considering the fiber optic alloca-tion mode of distribution network lines,two sets of judgment variables are randomly selected,and a model is established using reliability measurement.The intersection area is set as a possible fault location to achieve differential protection logic optimiza-tion for SDH carrying fiber optic allocation of distribution network lines.The experiments conduct differential protection tes-ting with two types of internal and external faults.The new method can be unaffected by transient capacitive current and con-trol the three-phase differential current at 0 A,with high safety.The response time of the differential protection is less than 5 ms,which improves the real-time performance of the differential protection.
differential protectionline fiber opticSDH load-bearing distribution networkreliability measurement
万方数据
维普
