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EVALUATION METHOD FOR DETERMINING OF THE PROBABILITY OF AN ASYMMETRICAL FAULT LOCATION IN A DISTRIBUTION NETWORK AND A MONITORING SYSTEM FOR PERFORMING SUCH METHOD
EVALUATION METHOD FOR DETERMINING OF THE PROBABILITY OF AN ASYMMETRICAL FAULT LOCATION IN A DISTRIBUTION NETWORK AND A MONITORING SYSTEM FOR PERFORMING SUCH METHOD
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机译:确定配电网中非对称故障位置概率的评估方法和执行该方法的监测系统
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摘要
Monitoring system for localisation of asymmetrical faults, comprising at least one monitoring unit and one evaluation unit, wherein a bi-directional communication is used between the evaluation unit and the monitoring unit and a control communication is used between the evaluation unit and a control unit, where the monitoring unit comprises at least one monitoring unit (1) of a negative sequence voltage and at least one monitoring unit (2) of a negative sequence current, wherein the monitoring unit (1) of a negative sequence voltage is intended for monitoring of time synchronised waveforms of the change of negative sequence voltage measured on a secondary side of distribution transformers (MV/LV) in a monitored section of a distribution network, the monitoring unit (2) of a negative sequence current is intended for monitoring and recording of time synchronised waveforms of the change of negative sequence current flowing through a supply transformer (HV/MV), the evaluation unit (3) is intended for determination of probability of asymmetrical fault presence or presence of a source of voltage/current unbalance in a monitored network on the basis of the changes of negative sequence voltage recorded by the monitoring units for given co-ordination time of a fault occurrence.
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