Title :
Unified power flow controller (UPFC) under nonlinear control
Author :
Bin Lu ; Ooi, Boon Teck
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que., Canada
Abstract :
The equations of the PWM voltage-source converter (PWM-VSC) are inherently nonlinear. This paper applies the nonlinear control, associated with A. Isidori, to the unified power flow controller (UPFC). Since the UPFC comprises two PWM-VSCs, this paper is one step further in complexity than the previous application of nonlinear control to the static compensator (STATCOM), which consists of one PWM-VSC. The key in applying nonlinear control is the art of formulating the "Lyapunov function", which fits the bilinear equations of the PWM-VSCs. As the family of controllers of flexible AC transmission systems (FACTS) are based on PWM-VSC, the same key is used to unlock the UPFC
Keywords :
Lyapunov methods; PWM power convertors; flexible AC transmission systems; load flow control; nonlinear control systems; power system control; static VAr compensators; FACTS; Lyapunov function; PWM voltage-source converter; STATCOM; UPFC; bilinear equations; flexible AC transmission system controllers; nonlinear control; static compensator; unified power flow controller; Art; Automatic voltage control; Control systems; Flexible AC transmission systems; Load flow; Lyapunov method; Nonlinear equations; Pulse width modulation; Pulse width modulation converters; STATCOM;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.998129
