论文标题
分析电压灵敏度分析不平衡的电源分配系统
Analytical Voltage Sensitivity Analysis for Unbalanced Power Distribution System
论文作者
论文摘要
在交易能源环境中，分布式能源和电动汽车的大规模整合在电压稳定性和电源分配系统中的波动方面提出了新的挑战。通常通过电压灵敏度分析来量化不同水平的DER/EV渗透对网络电压的影响。现有的电压敏感性分析方法在计算上是昂贵的，并且先前为开发分析近似的努力缺乏通用性，并且尚未得到有效验证。这项工作的目的是提供一种新的分析方法的电压灵敏度分析方法，该方法的计算成本较低，还可以对电压变化进行随机分析。本文首先得出了特定总线上电压变化的分析近似，因为在径向三相不平衡的电源分配系统中，其他总线在其他总线上的功耗变化。然后，提出的方法显示对不同的负载配置有效，这证明了其通用性。我们的分析方法的结果通过基于IEEE 37总线网络的测试系统的经典负载流量模拟进行了验证。与经典灵敏度分析方法中的O（N3）相比，所提出的方法显示具有良好的精度，并且计算复杂性是O（1）。
Large scale integration of distributed energy resources and electric vehicles in a transactive energy environment present new challenges in terms of voltage stability and fluctuations in a power distribution system. The impact of different level of DER/EV penetration on the voltages across the network is typically quantified through voltage sensitivity analyses. Existing methods of voltage sensitivity analysis are computationally expensive and prior efforts to develop analytical approximation lacks generality and have not been effectively validated. The objective of this work is to provide a new analytical method of voltage sensitivity analysis that has low computational cost and also allows for stochastic analysis of voltage change. This paper first derives an analytical approximation of change in voltage at a particular bus due to change in power consumption at other bus in a radial three phase unbalanced power distribution system. Then, the proposed method is shown to be valid for different load configurations, which demonstrates its generality. The results from our analytical approach is validated via classical load flow simulation of the test system based on IEEE 37 bus network. The proposed method is shown to have good accuracy, and computation complexity is of order O(1), compared to O(n3) in classical sensitivity analysis approaches.
