Title :
Small signal analysis of HVDC-HVAC interactions
Author :
Jovcic, Dragan ; Pahalawaththa, Nalin ; Zavahir, Mohamed
Author_Institution :
Auckland Univ., New Zealand
fDate :
4/1/1999 12:00:00 AM
Abstract :
This paper presents a small signal analysis of interactions between HVAC and HVDC systems. The eigenvalue analysis, along with analysis of participation factors, is firstly described. The eigenvalue sensitivity analysis shows how the changes of AC system parameters influence the stability of the considered HVDC-HVAC system. The influence of short circuit ratio (SCR) changes on both the rectifier and the inverter AC system, is studied by examining the relative movement of the system eigenvalues. The most important conclusions about AC-DC interactions are obtained by investigating the nature of inherent feedback loops between the systems. By examining the changes of all interaction variables, it is determined which of the interaction variables should be controlled and which are better left uncontrolled
Keywords :
HVDC power transmission; eigenvalues and eigenfunctions; feedback; invertors; power system dynamic stability; power system interconnection; rectifiers; sensitivity analysis; short-circuit currents; state-space methods; AC system parameters; AC-DC interactions; HVDC-HVAC interactions; eigenvalue analysis; eigenvalue sensitivity analysis; inherent feedback loops; interaction variables; inverter AC system; rectifier; short circuit ratio; small signal analysis; stability; state space methods; system eigenvalues; Circuit stability; Eigenvalues and eigenfunctions; Feedback loop; HVDC transmission; Inverters; Rectifiers; Sensitivity analysis; Signal analysis; Stability analysis; Thyristors;
Journal_Title :
Power Delivery, IEEE Transactions on
