Generalised eigenvalue and complex-torque-coefficient analysis for SSR study based on LDAE model

Damping analysis of primary and auxiliary control of HVDC systems

“…In practical cases, L e cannot be neglected and there is no clear analytical equations existed. Additionally, when the frequency-scanning technique is used, the impedance will change as the frequency changes and this increases the complexity of D e. Hence, the numerical iterative methods with help of computer have been interface between the eigenvalue analysis method and CTC method is detailed in Reference [11]. The interface between the eigenvalue analysis method and CTC method is detailed in Reference [11].…”

“…Additionally, when the frequency-scanning technique is used, the impedance will change as the frequency changes and this increases the complexity of D e. Hence, the numerical iterative methods with help of computer have been interface between the eigenvalue analysis method and CTC method is detailed in Reference [11]. The interface between the eigenvalue analysis method and CTC method is detailed in Reference [11]. In general, the damping analysis based on the CTC method is a frequency-domain analytical tool and always associated with the eigen-analysis and frequency scanning technique [23,24].…”

“…The effectiveness of the CTC method applied in HVDC systems was verified by Reference [10] with a great deal of simulation evidences. In Reference [11], the eigen-analysis method and the CTC method was combined to study the linearized differentialalgebraic-equation (LDAE) model for a power-system SSR problem, in which the eigenvalue analysis method is used for obtaining the static stability region of traditional ac power system while the CTC method is used for analyzing the HVDC/FACTS systems. However, it is still inadequate for designing the HVDC controller because the HVDC system is only approximately dealt with within the simple LDAE model.…”

Determination of reduced order model for torsional interaction investigations using selective modal analysis – Part II: Application to practical power systems

“…3 is represented by a set of differential and algebraic equations (DAE) [6] for inductive and capacitive elements in the D-Q variables as: Differential equations: …”

“…Yu et al [6] have proposed a linearized differential algebraic equation (LDAE) model and applied generalized eigen analysis for SSR studies on series compensated network. A systematic differential-algebraic model of the network, similar to that mentioned in [6] for SSR analysis of large power system is formulated. This LDAE model is used for the modelling of electrical network in IEEE second benchmark model and generalized selective eigen analysis is carried out.…”