Stability analysis of micro-grid frequency control system with two additive time-varying delay

Chen, Hua; Wang, Yibo; Wu, Shuangshuang

doi:10.1016/j.jfranklin.2019.08.013

Cited by 19 publications

(8 citation statements)

References 27 publications

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“…The unknown bounded scaling attack input pattern in per unit basis is shown in Fig. 4a and described in (10). The scaled system output is applied to observer and estimated variables via observer are considered as input to LQR controller.…”

Section: Effectiveness Of the Proposed Controller With Unknown Boundementioning

confidence: 99%

“…On increasing demand for the reliable smart energy system, the traditional power system modified through numerous technological infrastructure and motivated to implement wide-area monitoring system [5][6][7][8][9][10][11][12]. Therefore, the power system cause to participate in a typical delayed cyber-physical power system.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the smart power system cyber-physical networks enhance the growing opportunity of numerous threads against the security and stability of the modern power system. The classification and origin of threads are investigated in [8][9][10] for the security of future smart power system. The performance of modern power system control areas is extensively dependent on associated cyber networks, which inevitably leads to increased cyber vulnerabilities.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, several research efforts applied on the smart power system cyberphysical networks to minimise the impacts of cyber attacks as reported in [19][20][21][22][23][24][25][26][27][28]. Hence, power system cyber-physical networks based AGC problems can be divided into four cyber-attack vulnerabilities such as (i) infrastructure-based design and analysis [5][6][7][8][9][10][11][12], (ii) dynamic characteristics based design and analysis [21,22], (iii) unknown input attack uncertainty model-based detection and analysis [20,22,23,28,29] and (iv) communication delay…”

Section: Introductionmentioning

confidence: 99%

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Counteractive control against cyber‐attack uncertainties on frequency regulation in the power system

Prasad

2020

IET cyber-phys. syst.

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In this study, an observer based control strategy is proposed for load frequency control (LFC) scheme against cyberattack uncertainties. Most of research work focused on detection scheme or delay estimation scheme in presence of cyberattack vulnerabilities and paid less attention on design of counteractive robust control scheme for LFC problem. Thus, observer based control scheme is designed here and provides robust performance against unknown input attack uncertainty and communication time-delay attack uncertainty. The generalized extended state observer (GESO) is used not only for state and disturbance estimation but also for disturbance rejection of the system. The said observer ensures accurate estimation of the actual states leading to convergence of estimation error to zero. So, the observer based linear quadratic regulator (LQR) is used to regulate the closed-loop damping ratio against cyber-attack uncertainty. In addition to fast response in terms of settling time and reduced over/undershoots, the proposed control scheme satisfactorily compensates the cyber-attack uncertainties in power system cyber physical networks and also compared with existing traditional PI and PID controllers. The simulation results demonstrate the robustness in terms of stability and effectiveness in terms of system security with proposed controller when subjected to cyber-attack uncertainties and load disturbances.

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Section: Effectiveness Of the Proposed Controller With Unknown Boundementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Counteractive control against cyber‐attack uncertainties on frequency regulation in the power system

Prasad

2020

IET cyber-phys. syst.

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“…In this study, the constant power loads are modeled and only inverter‐based generation resources are considered. In some other studies, the design of nonlinear controllers for micro‐grid has been investigated and the LF has been used in the design process 23–26 . In Reference 27, large signal‐based stability analysis is performed on an inverter‐based micro‐grid.…”

Section: Introductionmentioning

confidence: 99%

The islanded micro‐grid large signal stability analysis based on neuro‐fuzzy model

Ahmadi

Kazemi

2020

Int Trans Electr Energ Syst

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Summary The study and identification of stability condition in an islanded micro‐grid are critical due to the lack of generation resources and load changes. On the other hand, the output power of the renewable units and the load level in a micro‐grid are uncertain and the system does not have a dominant operating point. Therefore, small signal analysis methods results have small validity range and cannot be generalized to the whole system. Therefore, a Lyapunov function (LF) based large signal stability method is proposed in this article to address the problem of small signal methods. Also, a Neuro‐Fuzzy system is proposed to consider uncertainties and network modeling. In this study, the Takagi‐Sugeno (T‐S) fuzzy system is used. Artificial neural network is also applied to provide an optimal tool for identifying system uncertainties, while T‐S rules are used to provide a framework of previous knowledge of the system. The main purpose is to propose an identification and modeling process to study the stability condition and boundaries in an islanded micro‐grid. After the uncertain system is modeled, the system LF is calculated using Linear Matrix Inequality and the system domain of attraction is determined.

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Investigation of a Microgrid Power System for Frequency Regulation by Implementing Ant Colony Optimization Technique Optimized Secondary Controller

Boopathi¹,

Jagatheesan²,

Anand

et al. 2023

Studies in Infrastructure and Control

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Stability analysis of micro-grid frequency control system with two additive time-varying delay

Cited by 19 publications

References 27 publications

Counteractive control against cyber‐attack uncertainties on frequency regulation in the power system

Counteractive control against cyber‐attack uncertainties on frequency regulation in the power system

The islanded micro‐grid large signal stability analysis based on neuro‐fuzzy model

Investigation of a Microgrid Power System for Frequency Regulation by Implementing Ant Colony Optimization Technique Optimized Secondary Controller

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