A Comprehensive Study on the Impact of Power Electronic Loads on Power System Transient Response and Stability

该建议涉及电力电子负载在互联电力系统中的作用的研究。由于它们的非线性(开关)特性和不断增加的渗透率，迫切需要准确地了解这些负载将如何影响大中型电力系统的稳定性和暂态行为。拟议的研究结合了分析工作、模拟研究、实验室实验和对真实现场数据的分析，以解决此类负载对电力系统的潜在有害影响。对具有电力电子负载的简单系统的动力学行为进行分析研究，作为识别其复杂行为的关键机制的一种手段。这些研究将反过来支持最先进的负载和系统模型的开发，这些模型能够模拟中型和大型电网，并具有足够的保真度来评估非线性负载的影响。建模工作将涉及开发聚合负载模型，以捕获数十万台此类设备的影响。与EPRI-PEAC合作的实验室中的实验工作，以及将由奥斯汀能源公司(德克萨斯州奥斯汀市政公用事业公司)提供的现场数据，将用于验证和调整模型，并确定真实系统预期的动力学行为的关键特征。反过来，分析和仿真将被用来评估这类系统在电力电子负载渗透率不断增加时的稳定性和暂态行为。

This proposal concerns the study of the role of power electronic loads in interconnected power systems. Due to their nonlinear (switching) character and increasing penetration, there is a critical need to understand precisely how such loads will impact both stability and transient behavior of large and medium-scale power systems. The proposed research combines analytical work, simulation studies, laboratory experiments, and analysis of real field data to address potential deleterious impact of such loads on the electrical power system. Analytical study of the dynamical behavior of simple systems with power electronic loads is proposed as a means of identifying the key mechanisms of their complex behavior. These studies will in turn support the development of state-of-the-art load and system models that enable simulation of medium and large-scale power networks, with sufficient fidelity to evaluate the impact of non-linear loads. Modeling work will involve developing aggregate load models to capture the effect of hundreds of thousands of such devices. Experimental work both in the laboratory in cooperation with EPRI-PEAC, and based on field data to be supplied by Austin Energy (the municipal utility of Austin, Texas) will be used to validate and tune the models and identify the key features of the dynamical behavior expected from real systems. In turn, analysis and simulation will be used to evaluate the stability and transient behavior of such systems with increasing penetration of power-electronic loads.