The study of disturbance sources energy size identification based on free energy theory  

作　　者：bi tianshu qin junda 

机构地区：[1]state key laboratory of alternate electrical power system with renewable energy sources,north china electric power university,Beijing 102206,China

出　　处：《Science China(Technological Sciences)》2018年第2期242-249,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51627811);the Fundamental Research Funds for the Central Universities(Grant No.2016ZZD01);"111"Project(Grant No.B08013)

摘　　要：The influence of power system disturbance on safety and stability is serious. Therefore, it is very important to identify the disturbance quickly and accurately. However, until now there is no unilbrm standard evaluation of disturbances on the energy impact strength, also no appropriate method to quantitatively and quickly assess the size of the disturbance energy. In this paper, the relationship between energy enthalpy and free energy in thermodynamics field is introduced into the description of disturbance free energy. And a new method based on energy entropy theory is proposed. In order to analyze the energy characteristics of various types of disturbances in power systems, an amended method of energy entropy is proposed. The free energy of each disturbance is described. Finally, the proposed theory is validated using the standard IEEE 39-bus system. The disturbance free energy is calculated under 5 kinds of disturbances. The proposed method provides a new idea to analyze the disturbance propagation and describe the impact strength of disturbance.

关 键 词：free energy disturbance identification energy identification energy entropy 

分 类 号：TM712[电气工程—电力系统及自动化]