Coordinated Control Strategies of China-Russia BTB-HVDC and SVC

Abstract

This paper discuses the performance of the SVC ( Static Var Compensator ) linked to the inverter side of ChinaRussia Heihe BTB (Back-to-Back) HVDC project. Detailed Heihe BTB-HVDC primary system, China side AC 500/220kV electromagnetic loop network, the control system of BTB-HVDC and SVC are modeled using the electromagnetic transient simulation software PSCAD/EMTDC. Based on the detailed models, the interaction between SVC and BTB-HVDC is analyzed, and the effectiveness of the coordinated control strategies is verified.

Developing feedback model for power system dynamic sensitivity analysis

“…Another widely applied approach to avoid the difficulty in understanding the dynamic impacts of any component changes in a power system is to design controllers to reshape the dynamic interactions of various dynamic components as designed. Other studies designed coordinated controllers for power system stabilizers; Lu et al and Shen et al applied the exact linearization method and robust control method to design nonlinear optimal excitation controllers for multimachine power systems; Han et al designed the coordinated control strategies for Static Var Compensator (SVC) and High Voltage Direct Current (HVDC) to stabilize the system. Although through controller designs, various components in a complex power system can be coordinated and the interactions among them can be controlled, there still exist strong needs to develop analytical methods for understanding the dynamic interactions of various power system components since in a real power system, the parameters of controllers and components are highly manufacturer dependent, which are different from the presumed models and their values can change in wide ranges during the operation.…”