Simulation of Power Quality in Residencial Electricity Networks
Simulation of Power Quality in Residencial Electricity Networks
复制标题
居民电网电能质量仿真
DOI：
10.24084/repqj01.440
复制
发表时间：
2003
影响因子：
--
通讯作者：
S. Watson
中科院分区：
文献类型：
--
作者：
D. McQueen;M. Mcqueen;P. Hyland;S. Watson
在低压电网中，用于需求估计的流行的工程实践（PEP）是基于由分集因子修改的分集后最大需求（ADMD）。该方法预测最大可能的电压降，考虑多样性。然而，它与需求的本质（可以表示为随机过程）以及诸如BS EN 50160的电能质量标准的措辞不一致。本文提出了一种数值方法，然后应用到一个案例研究。正在实施一项计划，以计量住宅用电需求。利用这些数据，开发了一个通用的数学模型。将该模型应用于三相低压电网的蒙特卡罗仿真。一所房子，是一个电源质量投诉，导致网络赔偿的主题，被选为案例研究。使用蒙特卡罗方法和PEP进行回顾性分析，以追溯维修前收到的电能质量;将其与投诉时记录的电压轨迹进行比较。然后，分析用于模拟当前网络设计的电能质量，并与测量结果进行比较。该模型也被用来检查相不平衡，和采样间隔的测量需求的影响。
The prevalent engineering practice (PEP) for demand estimation in Low Voltage electricity networks is based on an After Diversity Maximum Demand (ADMD) modified by a Diversity Factor. This method predicts the maximum likely voltage drop, accounting for diversity. However, it is inconsistent with both the nature of demand, which can be represented as a stochastic process, and with the wording of power quality standards such as BS EN 50160. This paper develops a numerical method that is then applied to a case study. A programme is undertaken to meter residential electricity demand. Using this data a generalised mathematical model is developed. The model is applied in a Monte Carlo simulation of the three-phase Low Voltage network. A house that was the subject of a power quality complaint, which resulted in network reparation, is chosen for the case study. A retrospective analysis is performed to hindcast the power quality received before the reparation, using both the Monte Carlo method and PEP; this is compared with a voltage trace recorded at the time of the complaint. The analysis is then used to model the power quality for the present network design and compared with measurements. The model is also used to examine phase unbalance, and the effect of sampling interval on measured demand.