适用于电力电子化电力系统的同调等值判据  

Coherency Criterion Applicable to Power Electronics Dominated Large Power Systems

作　　者：廖书寒 查晓明 黄萌[1] 孙建军[1] 胡伟[1] LIAO Shuhan;ZHA Xiaoming;HUANG Meng;SUN Jianjun;HU Wei(School of Electrical Engineering, Wuhan University, Wuhan 430072, Hubei Province, Chin)

机构地区：[1]武汉大学电气工程学院

出　　处：《中国电机工程学报》2018年第9期2589-2598,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51190102,51277137,51637007)~~

摘　　要：随着大规模新能源发电系统的发展,电力电子装备在电力系统中的渗透率越来越高。为了准确高效地研究扰动下电力系统装备的暂态运行特性及电力系统的稳定性,多电力电子装备的简化模型亟待建立。同调等值法是一种保留系统元件结构的等值建模方法,等值后的模型仍具有明确的物理意义,因此用同调等值法进行简化建模。同调等值的关键在于同调判据的建立。对于含多状态变量的并网逆变器,提出了基于广义哈密顿作用量的同调判别标准,依据能量守恒得到了实用化同调判据,且针对同步发电机,验证了基于广义哈密顿作用量的同调判据与传统基于功角的同调判据的相容性,并总结提出了通用同调判别方法。以7台并联逆变器作为算例,基于实用化同调判据建立了其同调等值模型,通过比较详细模型和等值模型的动态特性验证了同调判据的有效性。With the development of renewable energy generation systems, power conversion devices permeate the power system massively. To research dynamic characteristics of power conversion devices under disturbance and stability of the power electronics dominated power systems accurately and productively, a simplified model of multiple power conversion devices is expected to be established. Coherent equivalence is a modeling method capable of preserving the original structure of the element, and the equivalent model has specific physical significance. Thus, coherent equivalence was used to build the simplified models. The set of the coherency criterion determines on the effectiveness of the equivalent model. For the inverters with multiple state variables, a coherency criterion based on generalized Hamilton＇s action was proposed, and it wa simplified for practical use according to the principle of energy conservation. For synchronous generators, Hamilton＇s-action-based criterion and traditional power-angle-based criterion were proved to be compatible. Thus, the universal method of coherency identification is presented. The equivalent model of 7 paralleled inverters was built based on the practical criterion. Comparison of dynamic characteristics of detailed and equivalent models verified the effectiveness of the coherency criterion.

关 键 词：电力电子化电力系统 变流器 同调判据 哈密顿作用量 等值建模 

分 类 号：TM712[电气工程—电力系统及自动化]