scholarly journals New Second-Order Sliding Mode Control Design for Load Frequency Control of a Power System

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6509
Author(s):  
Van Van Huynh ◽  
Phong Thanh Tran ◽  
Bui Le Ngoc Minh ◽  
Anh Tuan Tran ◽  
Dao Huy Tuan ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Frequency Control ◽  
Second Order ◽  
Load Frequency Control ◽  
Power Network ◽  
Parameter Uncertainties ◽  
Mode Control ◽  
Load Frequency ◽  
Chattering Phenomenon

The implementation of the sliding mode control (SMC) for load frequency control of power networks becomes difficult due to the chattering phenomenon of high-frequency switching. This chattering problem in SMC is extremely dangerous for actuators used in power systems. In this paper, a continuous control strategy by combining a second-order mode and integral siding surface is proposed as a possible solution to this problem. The proposed second-order integral sliding mode control (SOISMC) law not only rejects chattering phenomenon in control input, but also guarantees the robustness of the multi-area power network, which has an effect on parametric uncertainties such as the load variations and the matched or mismatched parameter uncertainties. Moreover, the reporting of the simulation indicates that the proposed controller upholds the quality requirement by controlling with operating conditions in the larger range, rejects disturbance, reduces the transient response of frequency, eliminates the overshoot problem, and can better address load uncertainties compared to several previous control methods. The simulation results also show that the proposed SOISMC can be used for practical multi-area power network to lessen high parameter uncertainties and load disturbances.

scholarly journals Load Frequency Control for Multi-Area Power Plants with Integrated Wind Resources

2021 ◽  
Vol 11 (7) ◽  
pp. 3051
Author(s):  
Van Van Huynh ◽  
Bui Le Ngoc Minh ◽  
Emmanuel Nduka Amaefule ◽  
Anh-Tuan Tran ◽  
Phong Thanh Tran ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Power System ◽  
Sliding Mode ◽  
Frequency Control ◽  
Time Derivative ◽  
State Observer ◽  
Second Order ◽  
Load Frequency Control ◽  
Mode Control ◽  
Load Frequency

To provide a more practical method of controlling the frequency and tie-line power flow of a multi-area interconnected power system (MAIPS), a state observer based on sliding mode control (SOboSMC) acting under a second-order time derivative is proposed. The proposed design is used to study load frequency control against load disturbance, matched and mismatched uncertainty and parameter measurement difficulties of power systems that exist in the modern power plant, such as multi-area systems integrated with wind plants. Firstly, the state observer is designed to optimally estimate system state variables. The estimated states are applied to construct the model of the MAIPS. Secondly, a SOboSMC is designed with an integral switching surface acting on the second-order time derivative to forcefully drive the dynamic errors to zero and eliminate chattering, which can occur in the first-order approach to sliding mode control. In addition, the stability of the total power system is demonstrated with the Lyapunov stability theory based on a new linear matrix inequality (LMI) technique. To extend the validation of the proposed design control for practical purposes, it was tested in a New England system with 39 bus power against random load disturbances. The simulation results confirm the superiority of the proposed SOboSMC over other recent controllers with respect to overshoot and settling time.

Load Frequency Control in Multi-Area Interconnected Power Systems Using Second Order Sliding Mode

2020 ◽  
pp. 300-336
Author(s):  
Ark Dev ◽  
Mrinal Kanti Sarkar
Keyword(s):  
Sliding Mode Control ◽  
Power Systems ◽  
Sliding Mode ◽  
Frequency Control ◽  
Second Order ◽  
Load Frequency Control ◽  
Parameter Uncertainties ◽  
Load Frequency ◽  
Tie Line ◽  
Second Order Sliding Mode

The chapter focuses on load frequency control (LFC) problems in multi area power systems using nonlinear second order sliding mode control (NL-SOSMC) under load disturbances and parameter uncertainties. A sudden load disturbance can causes deviation in frequency and tie line power from their schedule value. The main objective of the chapter is to give knowledge about the application of robust control technique mainly sliding mode control (SMC) for load frequency problems. The designed controller ensures finite time convergence of frequency and tie line power deviations with chattering free control signal. The proposed controller confirms better transient and steady state behavior. Furthermore, the controller is validated under matched uncertainty, random step load disturbances, parameter uncertainties, and with nonlinearities in power system like generation rate constraints (GRC) and governor dead band (GDB). The stability of the controller is theoretically proved using Lyapunov candidate function and verified using simulations in MATLAB R2015a.

Hydropower Plant Load Frequency Control Via Second-Order Sliding Mode

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Xibei Ding ◽  
Alok Sinha
Keyword(s):  
Sliding Mode Control ◽  
Control Method ◽  
Sliding Mode ◽  
Frequency Control ◽  
Second Order ◽  
Load Frequency Control ◽  
Hydropower Plant ◽  
Mode Control ◽  
Twisting Algorithm ◽  
Second Order Sliding Mode

Super-twisting algorithm, a second-order sliding mode control method, is studied for hydropower plant frequency control. Two versions of this algorithm are introduced in this paper. Simulation results from both of these second-order methods and regular sliding mode control are compared on the basis of system responses and control efforts. It is shown that the second-order sliding mode controller is able to reduce chattering effects associated with the regular sliding mode control and preserve the robustness of the regular sliding mode control as well.

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