A Study of Total Transient Energy During the Fault Period

作者：Wu Di^*; Jiang John N

来源：Electric Power Components and Systems, 2017, 45(11): 1161-1172.

DOI：10.1080/15325008.2017.1334245

• total transient energy
• power system dynamics
• transient stability
• potential energy
• kinetic energy
• critical fault location
• coherent generator
• critical generator
• energy interchange
• distribution factors of total transient energy

The total transient energy accumulated during the fault period is an important factor affecting power system dynamics. In this paper, we present a study of the total transient energy. First, we analyze the characteristics of energy interchange during the fault period. Then, an expression is developed based on characteristics analysis to estimate the total transient energy. Such an expression allows us to study how a fault, in terms of its magnitude, clearing time, and location, affects the total transient energy. Especially, the distribution factors of the total transient energy are defined based upon the expression to analyze the impact of fault location. It is found that for a fault with the given magnitude and clearing time, the total amount of total transient energy mainly depends on the difference in the distribution factors. Furthermore, it is found that the distribution factors can be applied to the identification of potential critical fault locations, the identification of coherent generators, and the identification of critical generators. The analysis results and their applications are demonstrated in the IEEE 9-bus system and the IEEE 39-bus system.

• 出版日期2017