Title :
Nonlinear control for VSC based HVDC system
Author :
Chen, Hairong ; Xu, Zheng ; Zhang, Fan
Author_Institution :
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
Voltage source converter (VSC) based HVDC is a multivariable, strongly coupled nonlinear system. It is quite difficult to establish the precise mathematic model of the VSC. This paper adopts the theory of the nonlinear transformation and the feedback linearization of nonlinear system, establishes the nonlinear mathematic model of the VSC in d-q synchronous reference frame. The decoupled control strategy with state variable feedback linearization, which is combined with the optical control theory, is proposed in this paper. And with this strategy the active and reactive power can be controlled independently. Simulation results realized by PSCAD/EMTDC show that the designed control system has better control performance
Keywords :
HVDC power convertors; feedback; linearisation techniques; mathematical analysis; multivariable control systems; nonlinear control systems; optimal control; power system CAD; reactive power control; EMTDC; HVDC system; PSCAD; active power; coupled nonlinear system; d-q synchronous reference frame; decoupled control strategy; nonlinear control; nonlinear mathematic model; nonlinear transformation; optical control theory; reactive power control; state variable feedback linearization; voltage source converter; Control systems; Converters; HVDC transmission; Mathematical model; Mathematics; Nonlinear control systems; Nonlinear systems; Optical feedback; Optical variables control; Power conversion; Exact linearization via feedback; HVDC; PSCAD/EMTDC; Phase lock loop (PLL); Voltage source converter (VSC); nonlinear control;
Conference_Titel :
Power Engineering Society General Meeting, 2006. IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0493-2
DOI :
10.1109/PES.2006.1709275
