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公开(公告)号：US20170074919A1
公开(公告)日：2017-03-16
申请号：US15120109
申请日：2015-02-18
CPC分类号： G01R31/086 , H02H7/268 , H02H9/02 , Y04S10/522
摘要： This application relates to methods and apparatus for fault protection in a DC power transmission network or grid that aid in determining the location of a fault in the network. The method involves, in the event of a fault, controlling at least one current limiting element of the network so as to limit a fault current flowing to below a first current level which is within the expected current operating range of the network in normal operation, i.e. a safe level. The fault current is then controlled to maintain a non-zero level of fault current flow and the characteristics of the fault current flow at different parts of the network are determined by fault current detection modules. The location of the fault is then determined based on the determined characteristics.
摘要翻译： 本申请涉及用于确定网络中的故障位置的直流输电网络或电网中的故障保护的方法和装置。 该方法涉及在发生故障的情况下控制网络的至少一个限流元件，以便限制在正常操作中流动到低于网络的预期当前工作范围内的第一电流电平的故障电流， 即一个安全的水平。 然后控制故障电流以保持非零电平的故障电流，并且故障电流流量在网络的不同部分的特性由故障电流检测模块确定。 然后基于确定的特性确定故障的位置。
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公开(公告)号：US11025065B2
公开(公告)日：2021-06-01
申请号：US16072194
申请日：2017-01-20
摘要： The present invention relates to a method of monitoring oscillations that are liable to interact in an electrical power network, in dependence on measurement of AC waveforms in the electrical power network. The method comprises receiving first waveform data corresponding to an electrical quantity in each phase of at least two phases of three-phase AC waveforms at a location in the electrical power network. The method further comprises applying a transformation to the first waveform data to provide therefrom second waveform data corresponding to an electrical quantity at the location in a single phase representation, the second waveform data depending on the at least two phases.
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公开(公告)号：US10310003B2
公开(公告)日：2019-06-04
申请号：US15120109
申请日：2015-02-18
摘要： This application relates to methods and apparatus for fault protection in a DC power transmission network or grid that aid in determining the location of a fault in the network. The method involves, in the event of a fault, controlling at least one current limiting element of the network so as to limit a fault current flowing to below a first current level which is within the expected current operating range of the network in normal operation, i.e. a safe level. The fault current is then controlled to maintain a non-zero level of fault current flow and the characteristics of the fault current flow at different parts of the network are determined by fault current detection modules. The location of the fault is then determined based on the determined characteristics.
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