Initialization of Electromagnetic Transient Simulation Using Boundary Value Solution Method

Abstract

Initialization is an important preliminary work in electromagnetic transient simulation which is typically executed from the periodic steady-state. To this end, researchers have proposed so far a variety of initialization methods, among which the initialization based on fixed-point iteration or the so-called the EMTP-based approach has been widely used. However, this type of method can be very time consuming for a large power system due to its weak convergence. In this paper, the initialization is described as a two-point differential boundary value problem. On this basis, the boundary value solution technique is used to solve this problem, therefore, a new electromagnetic transient initialization method is derived. The proposed method is a strict Newton algorithm, so it has better convergence than the traditional fixed-point iteration method. Case studies conducted on two typical network have confirmed the effectiveness of the proposed method.