Guaranteed cost load frequency control for a class of uncertain power systems with large delay periods

Wang, Rui; Xu, Liangfei; Zhou, Wenya

doi:10.1016/j.neucom.2015.05.099

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…In the work by Wang et al (2015) and Li et al (2015b), the instability of the power system can be caused by large delay periods, based on the constraint condition of the ratio of a large delay period in the whole time interval, the guaranteed cost of the load frequency controller is obtained such that the closed-loop system is exponentially stable, however, this ratio is similar to A in this paper. We can see in Table 1, the dynamics of the power system can achieved by the stability in the work by Wang et al (2015) when A ≤ 0 . 25 . However, the dynamics of the power system can achieve the stability in the work by Li et al (2015b) when A ≤ 0 . 0753 .…”

Section: Example and Simulation Resultsmentioning

confidence: 93%

Cyber security study for power systems under denial of service attacks

Shen

Fei

2017

Transactions of the Institute of Measurement and Control

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An open communication infrastructure is used to support data transmission in a modern deregulated power system, it makes communication channels vulnerable to cyber-attacks and the reliability of the power system is affected. This paper studies the load frequency control of a one area power system under denial-of-service attacks. First, the state model of the closed-loop power system for one area is formulated, where the time delay of the communication channels is taken into account. Secondly, an event-triggering control mechanism is integrated with the load frequency control scheme of the power system; it can effectively improve the utilization of communication channels for an area control error transmission. Then, by utilizing the average dwell time design approach, the exponential stability criteria and the good stability effect can be obtained for a one area power system with an event-triggered load frequency control scheme under denial-of-service attacks, if an appropriate rate is chosen for the allowable denial-of-service attacks duration when the entire system running, and if the time delay margin can be acquired for these criteria. Finally, an example shows that the dynamics of a one area power system are compared with different denial-of-service attacks scenarios.

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Section: Example and Simulation Resultsmentioning

confidence: 93%

Cyber security study for power systems under denial of service attacks

Shen

Fei

2017

Transactions of the Institute of Measurement and Control

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“…The delay signals inputs are given to PI controller to control the LFC for a guaranty cost. LFC for a group of unknown power systems considered with the help of Large Delay Periods (LDP's) [14]. The typical LFC for power systems with LDPs have been primarily exhibited as a switched delay system which comprises of potentially uneven subsystem due to LDPs and a stable subsystem due to Small Delay Periods (SDP's).…”

Section: Fig 4 -Double Mode Gain Scheduling For Pi Controller Using mentioning

confidence: 99%

Analysis on various optimization techniques used for Load Frequency Control in power system

Kumar

Indragandhi

2018

Serb J Electr Eng

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In a unified power system the Load Frequency Control (LFC) is taken for review looking at all aspects with various optimization techniques for optimizing the parameters of PI, PID and Fuzzy controllers. The power system with multi area consists of conventional, renewable and combination of both with some energy devices like SMES, battery sources is analyzed specifically in this manuscript. The controllers are designed for a deregulated environment of a power system for LFC. The Model Predictive Control (MPC) and some other control techniques are used to control LFC under various disturbances like GRC and dead band control. For the readers ease of understanding the time response comparison graph of the controller for single and multiple areas of power system is depicted.

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“…So far in the literature, several interesting results on robust control strategy have been discussed for both the linear [15] and nonlinear [16] dynamical systems. Consequently, the researchers probed in designing the robust control protocol to investigate the frequency stability of MAPSs together with parameter uncertainties (see, other works [17][18][19] and the references cited therein). Notably, in the work of Lu et al [17], the robust proportional-integral control has been designed to investigate the load frequency control problem of MAPSs subject to uncertainties and load disturbances.…”

Section: Introductionmentioning

confidence: 99%

State estimation and frequency stabilization of multi‐area power systems via fault‐alarm approach

Harshavarthini

Sakthivel

Kumar³

et al. 2021

Asian Journal of Control

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This work is mainly focused on designing hybrid memory state feedback load frequency control law for a class of multi-area power systems against transmission delays, parameter uncertainties, actuator faults, and load disturbances via fault-alarm approach. More specifically, the load disturbances are prompted by the incorporation of abundance amount of renewable energy resources, namely, photo voltaic and wind power. Additionally, the power system takes the effect of actuator faults into account, which is unavoidable and exists at any instant of time. Thus, to stabilize the addressed system, the fault-alarm approach is exploited to develop the hybrid control law. Particularly, the state dynamics are well estimated by the aid of residual observer to detect the faulty condition of actuators. Also, by following the algorithm of fault detection, the spontaneous alert from the alarm is accomplished. Further, in consideration of appropriate Lyapunov-Krasovskii functional, the stability conditions having linear matrix inequality form are derived and which affirms the asymptotic stability of the power systems. Precisely, the controller gain matrices are obtained by solving the developed sufficient conditions. Eventually, the simulation results of two-area interconnected power systems are presented to examine the applicability and advantage of the proposed theoretical result. KEYWORDS fault-alarm-based hybrid control, multi-area power systems, transmission delays and uncertainties

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Guaranteed cost load frequency control for a class of uncertain power systems with large delay periods

Cited by 13 publications

References 28 publications

Cyber security study for power systems under denial of service attacks

Cyber security study for power systems under denial of service attacks

Analysis on various optimization techniques used for Load Frequency Control in power system

State estimation and frequency stabilization of multi‐area power systems via fault‐alarm approach

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