【摘要】 针对送端不对称和受端对称的同杆四回线构成的混合四回线线路故障测距问题,提出等效的同杆四回线线路模型,基于故障点的相阻抗和故障距离成正比的关系,利用实测同步双端电气量构造双端故障测距算法,从原理上消除了测距算法易受过渡电阻影响的问题。大量的PSCAD/EMTDC仿真结果表明,该测距方法的测距精度不受故障回路选择和过渡电阻等因素影响,验证了该方法的可行性和精确性,为混合线路故障测距提供了一种新方法。更多还原

【Abstract】 Aiming at the mixed four parallel transmission line fault location problem,which is consisted of the asymmetric sending end and symmetric receiving end four parallel-line on the same tower,the equivalent of four-bar loop line model is put forward.Based on the proportional to the phase impedance of the failure point and fault distance,the measured simultaneous double-side electrical quantities were used to establish double-terminal fault location algorithm.In theory,the problem of fault distance algorithm affected by the transition resistance was eliminated.A large number of PSCAD/EMTDC simulation results show that the accuracy of the proposed method is not affected by fault circuit selection and transition resistance.The feasibility and accuracy of the method is verified,which provides a new method for hybrid line fault distance measurement.更多还原