NDLI: Stabilisation of asymmetrically structured back-to-back static synchronous compensator system with non-linear damping control

Content Provider	IET Digital Library
Author	Lee, Young Ok Gui, Yonghao Han, Youngseong Chung, Chung Choo
Abstract	This study describes a new back-to-back static synchronous compensator (BTB STATCOM) system with asymmetrically structured converters and develops its mathematical model. BTB STATCOM uses pulse-width modulation technology for a rectifier station along with multipulse technology for an inverter station. The authors propose a control strategy for the following three control variables: DC voltage and both active and reactive rectifier powers. In the rectifier station, input–output linearisation via the feedback control law is applied for independent control of the active and reactive powers. Conversely, the controller is not applicable for maintaining the DC voltage because of its irregularity. They design an alternative indirect damping controller for the reactive current within the inverter station. The proposed controller improves the stability margin and decreases the oscillation of DC voltage with a degraded reactive current tracking performance of the inverter. Using simulation, they validate the proposed method, comparing its effectiveness to that of a proportional-plus-integral-plus-derivative controller. They investigate the semi-globally exponential stability of the damped internal dynamics using a parameter-dependent Lyapunov (PDL) function. Using a composite Lyapunov function based on the PDL function, the uniform boundedness of the output regulation error as well as the closed-loop stability is established.
Starting Page	1952
Ending Page	1962
Page Count	11
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 10, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0004
Journal	IET Power Electronics
Publisher Date	2015-08-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Rectifier Powers Asymmetrically Structured Back-to-back Static Synchronous Compensator System Asymmetrically Structured Converter BTB STATCOM Closed Loop System Closed-loop Stability Composite Lyapunov Function Control of Electric Power System Control Strategy DC Voltage DC Voltage Oscillation Degraded Reactive Current Tracking Performance Feedback Feedback Control Law Indirect Damping Controller Input–output Linearisation Inverter Station Invertors Lyapunov Method Mathematical Model Multipulse Technology Nonlinear Damping Control Other Power Apparatus And Electric Machine Output Regulation Error Parameter-dependent Lyapunov Function PDL Function Power And Energy Control Power Converter Power System Control Proportional-plus-integral-plus-derivative Controller Pulse-width Modulation Technology Reactive Current Reactive Power Control Reactive Rectifier Powers Rectifier Rectifier Station Semiglobally Exponential Stability Stabilisation Stability Margin Static VAr Compensators Three-term Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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