The analysis of voltage and current unbalance by application of active and reactive power in the fundamental frequency negative-sequence components
The analysis of voltage and current unbalance by application of active and reactive power in the fundamental frequency negative-sequence components
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DOI：
10.1109/ichqp.2012.6381224
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发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
T. Seiphetlho;A. Rens
中科院分区：
文献类型：
--
作者：
T. Seiphetlho;A. Rens
在不平衡的电力网络中的基频负序功率分量的行为进行评估的可能信息的相对贡献的供应和负载网络。以往的研究表明，当电网中存在多个不平衡源时，系统基波负序有功功率的方向与单个不平衡源的位置并不一致。本文分析了所有负序功率分量在基波频率的有用性，作为信息的位置和程度的贡献，在公共耦合点（PCC）的电压不平衡的一个单一的不平衡源在实际的电力系统。得到的结果证实，基频负序有功功率的方向是不一致的不平衡的来源，但基频负序无功功率的方向是信息的不平衡的主导源。
The behaviour of the fundamental frequency negative-sequence power components in unbalanced power networks is evaluated for possible information on the relative contribution by the supply and loading network. Previous studies indicated that the direction of the negative-sequence active power in the fundamental frequency do not consistently commensurate with the location of a single source of unbalance in a power system when multiple sources of unbalance are located all over the network. This paper analyse the usefulness of all negative-sequence power components in the fundamental frequency, as information on the location and the degree of contribution to the voltage unbalance at the Point of Common Coupling (PCC) of a single source of unbalance in practical power systems. The results obtained confirmed that the direction of the fundamental frequency negative-sequence active power is not consistent with the source of unbalance but that the direction of the fundamental frequency negative-sequence reactive power is informative on the dominating source of unbalance.