Fault‐tolerant control design to enhance damping of inter‐area oscillations in power grids

Sevilla, Félix Rafael Segundo; Jaimoukha, Imad M.; Chaudhuri, Balarko; Korba, Petr

doi:10.1002/rnc.2988

Cited by 23 publications

(8 citation statements)

References 39 publications

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“…then 𝑐̂𝑘 𝑗 ∈ ℛ 1×𝑛 denotes the kth output. To represent loss of wide-area signal, the matrix 𝐶 ̂𝑗 of ( 9) is updated as follows [29]:…”

Section: ) Loss Of Wide-area Feedback Signalsmentioning

confidence: 99%

A Reduced-Order Robust Wide-Area Damping Control for Wind-PV-Thermal-Bundled Power System Considering Operational Uncertainties and Communication Resilience

Wang,

Sadiq,

Gan

2024

IEEE Access

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The wind-photovoltaic-thermal-bundled power system (WPTBS) comes with a wide range of potential grid applications and provides an efficient way to export bulk amount of power under high intermittency of wind and photovoltaic (PV) resources. This increasing penetration alongside distant power transmission, however, may cause detrimental impacts on low-frequency oscillations (LFOs), eventually threatening the stability of WPTBS. In this prospect, installing a wide-area damping controller (WADC) is proven to be efficient in suppressing LFOs but the uncertainty related to varying operating points, the time delay involved in transmitting a wide-area signal, and the possibility of remote signal disconnection may compromise the damping capability of a WADC. Following that, the proposed study presents a reduced-order robust wide-area damping controller (RWDC), injected into the wind turbine system, to stabilize the LFOs in the WPTBS while accounting for operational uncertainties, time delays, and communication failure. At first, the uncertainties are characterized in the form of polytope vertices, where each vertex represents a linearized model corresponding to a distinct operating condition. A two-stage linear matrix inequality (LMI) approach is then adopted to determine the design parameters of reduced-order RWDC, which simultaneously stabilizes the entire uncertain model by minimizing the 𝐻 ∞ norm and ensures closed-loop stability via parameter-dependent Lyapunov functions. Finally, using small-signal analysis and extensive simulation results, the effectiveness of the controller is confirmed under different operating scenarios, including critical and unstable oscillation conditions, followed by a comparison with existing methods.

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“…then 𝑐̂𝑘 𝑗 ∈ ℛ 1×𝑛 denotes the kth output. To represent loss of wide-area signal, the matrix 𝐶 ̂𝑗 of ( 9) is updated as follows [29]:…”

Section: ) Loss Of Wide-area Feedback Signalsmentioning

confidence: 99%

A Reduced-Order Robust Wide-Area Damping Control for Wind-PV-Thermal-Bundled Power System Considering Operational Uncertainties and Communication Resilience

Wang,

Sadiq,

Gan

2024

IEEE Access

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“…3)∆(t) = ∆(t) and L is fixed: this defines what we call a minimal switching observer [18]. Although the observer is reconfigurable, so that it is a switching observer, the switching is between the observer outputs using a fixed L, hence the designation minimal.…”

Section: B System Descriptionmentioning

confidence: 99%

A Semidefinite Relaxation Procedure for Fault-Tolerant Observer Design

Sevilla

Jaimoukha

Chaudhuri

et al. 2015

IEEE Trans. Automat. Contr.

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Abstract-A fault-tolerant observer design methodology is proposed. The aim is to guarantee a minimum level of closed-loop performance under all possible sensor fault combinations while optimizing performance under the nominal, fault-free condition. A novel approach is proposed to tackle the combinatorial nature of the problem, which is computationally intractable even for a moderate number of sensors, by recasting the problem as a robust performance problem, where the uncertainty set is composed of all combinations of a set of binary variables. A procedure based on an elimination lemma and an extension of a semidefinite relaxation procedure for binary variables is then used to derive sufficient conditions (necessary and sufficient in the case of one binary variable) for the solution of the problem which significantly reduces the number of matrix inequalities needed to solve the problem. The procedure is illustrated by considering a fault-tolerant observer switching scheme in which the observer outputs track the actual sensor fault condition. A numerical example from an electric power application is presented to illustrate the effectiveness of the design.

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“…The problem of transmission time delay has been extensively addressed in the literature [12], [13], [14], [15], [16], [17]. However, research on communication failures has been very limited and the major contributions addressing this concern can be found in [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], and [28]. With the expected increase in the adoption of WADCs in the future and the use of WAMS technology, power systems will be more susceptible to information failures and malicious attacks, such as cyberattacks [1].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, passive schemes work in a preventive manner, which means that they are conservative in action during normal system conditions. Several techniques have been presented to provide control resiliency against communication failures in a preventive way [18], [19], [20], [21], [22], [23], [24]. In such a case, the WADC is designed to ensure satisfactory damping performance for the defined possible communication failures.…”

Section: Introductionmentioning

confidence: 99%

A Criterion for Designing Emergency Control Schemes to Counteract Communication Failures in Wide-Area Damping Control

et al. 2023

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Communication failures and transmission delays are two major issues associated with Wide-Area Damping Controllers (WADCs). While transmission delays have been extensively studied and various solutions have been proposed, little research has been done on communication failures and most of the proposed methods are based on preventive controls. However, in today's liberalized electricity markets, preventive controls are no longer acceptable and the trend is to use emergency controls instead. This paper proposes a novel emergency control scheme to counteract the loss of remote signals related to the input and to the output of the WADC (i.e. sensor and actuator failures). The proposed scheme is based on a simple criterion, which overcomes the complexity of the previous methods. Modal analysis and time domain simulations are performed to verify the performance of the proposed method. The simulation results show that the proposed method performs well in handling communication failures and can maintain good damping performance. This research work is particularly important in view of the trend towards the wide-scale adoption of wide-area measurement technologies, while the vulnerability to cyber-attacks is increasing.INDEX TERMS Communication failures, emergency control, inter-area oscillations, wide-area damping controller (WADC).

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Fault‐tolerant control design to enhance damping of inter‐area oscillations in power grids

Cited by 23 publications

References 39 publications

A Reduced-Order Robust Wide-Area Damping Control for Wind-PV-Thermal-Bundled Power System Considering Operational Uncertainties and Communication Resilience

A Reduced-Order Robust Wide-Area Damping Control for Wind-PV-Thermal-Bundled Power System Considering Operational Uncertainties and Communication Resilience

A Semidefinite Relaxation Procedure for Fault-Tolerant Observer Design

A Criterion for Designing Emergency Control Schemes to Counteract Communication Failures in Wide-Area Damping Control

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