NDLI: Measurement-based wide-area damping of inter-area oscillations based on MIMO identification

Content Provider	IET Digital Library
Author	Thakallapelli, Abilash Kamalasadan, Sukumar
Abstract	Interconnected power grid exhibits oscillatory response after a disturbance in the system. One such type of oscillation, the inter-area oscillation has the oscillation frequency in the range of 0.1–1 Hz. The damping of inter-area oscillations is difficult with local controllers, but it can be achieved using a wide area damping controller (WADC). For effective control, the input to the WADC should be the most observable signal, and the WADC output should be sent to the most controllable generator. This study presents a measurement-based novel algorithm for multi-input-multi-output (MIMO) transfer function identification of the power system to estimate such oscillation frequencies. The wide-area control loop is estimated using the MIMO transfer function, and the WADC design is a combination of the discrete linear quadratic regulator and Kalman filtering for the damping of inter-area oscillations. Since the MIMO identification is performed using the actual measurements, the proposed method can accurately monitor changes in the power grid, whereas the conventional methods are derived from small-signal analysis of a linearized model that does not consider changing operating conditions. The overall algorithm is implemented and validated on a RTDS/RSCAD® and MATLAB® real-time co-simulation platform using two-area and IEEE 39-bus power system models.
Starting Page	2464
Ending Page	2475
Page Count	12
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 13, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1268
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-05-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control Engineering Computing Control of Electric Power System Control System Analysis Cosimulation Platform Damping Digital Signal Processing Discrete Linear Quadratic Regulator Filtering Method in Signal Processing IEEE 39-bus Power System Model Inter-area Oscillation Interconnected Power Grid Kalman Filter Kalman Filtering Linear Quadratic Control MATLAB Measurement-based Wide-area Damping MIMO Identification MIMO System MIMO Transfer Function Multiinput-multioutput Transfer Function Identification Multivariable Control System Optimal Control Oscillation Oscillation Frequency Power Engineering Computing Power Grid Power System Control Power System Economics Power System Interconnection Power System Managemen Power System Measurement Power System Measurement And Metering Power System Operation Power System Simulation Power System Stability RTDS-RSCAD Stability in Control Theory Synthesis Method Transfer Function Two-area WADC Wide Area Damping Controller Wide-area Control Loop
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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