新背景下电力系统的建模思路

Trends of Power System Modeling Under New Background

电力电子技术已广泛应用于现代电力系统发电、输电、用电各个方面;与此同时,电网在不断扩张并大规模消纳风电、光电、水电等新能源,电力系统中的随机性日益明显。在这种新的背景下,对电力系统的研究需要有新的模型。分析了电力系统电力电子化、随机性和智能化新背景;讨论了在这种新背景下电力系统建模的新需求,即破解电力系统建模"准"、"大"、"变"的难题;提出了总体等效建模、在线分布建模和时频混合建模等电力系统建模新思路。

The techonology of power electronics has widely used in power generation,power transmission and power utilization of modern power system. At the same time,power system is expanding and integrating newenergies sources such as wind power,photoelectric power,hydroelectric power,etc.,in a large scale. As a result,the randomness of power system becomes increasingly evident. Under the newbackground,newmodels of the power system are necessary for its research. The newbackground of power system is summarized as power electronics,randomness and smart grid in this paper. It is pointed that the newneeds for power system modeling may include accurency,wide-area and variation. Then the newtrends of power system modeling are foreseen,i. e. equivalent modeling,on-line distributed modeling and hybrid time and frequency domain modeling.