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Recent Advances in Electrical & Electronic Engineering - Online First
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Direct Power Control of BDFRG Based on Novel Integral Sliding Mode Control
Authors: Xiaoliang Yang, Yixuan Qin, Jihao Zhan, Yihao Li, Suya Hao and Zhiang FuAvailable online: 03 October 2024More LessIntroductionIn grid-connected operation control, the Brushless Doubly-Fed Reluctance Generator (BDFRG) faces issues with strong parameter coupling and weak disturbance rejection.
MethodsThis paper proposes a direct power control strategy with a novel integral sliding mode controller. By analyzing the correlation between the voltages on the stator control winding side and the active/reactive power, a direct power control model is derived from the d-q rotating coordinate system, achieving decoupling control of active and reactive power. An integral sliding surface, along with a smoothing function, is introduced to improve the switching behavior as the system approaches the sliding surface. Stability ranges for the parameters Kd and Kq are determined by constructing a Lyapunov function.
ResultsResults from simulations and hardware-in-the-loop (HIL) experiments demonstrate that the direct power control strategy with a novel integral sliding mode controller reduces chattering and improves the static and dynamic performance of the system, compared to conventional sliding mode control strategy.
ConclusionThe proposed direct power control strategy not only addresses the chattering issues during sliding mode switching but also ensures system stability and efficiency through optimized parameter adjustment.
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Research on Coordination Optimal Scheduling Method for Integrated Energy System Based on Finite-time Event-triggered Consensus Algorithm
Authors: Lizhen Wu, Heng Yang, Wei Chen and Tingting PeiAvailable online: 23 October 2022More LessBackgroundThe coupling of multiple heterogeneous energy sources in an integrated energy system has led to difficulties in coordinating the optimal scheduling of various energy sources. As a typical cyber-physical system, the development scale of an integrated energy system is limited by the communication bandwidth.
ObjectiveA coordinated optimal scheduling method for integrated energy system based on finite-time event-triggered consensus algorithm is proposed in this paper to achieve the optimal operation of an integrated energy system and lower the burden on the communication network.
MethodsIn this paper, the optimal scheduling model of integrated energy system is established, and the finite-time consensus algorithm is applied to solve the model, so that the operating costs of various energy sources can reach the optimal solution within a finite time. Then, a discrete system communication scheme is established so that neighbor nodes exchange state information only at the triggering instants. The stability of the system is analyzed using the Lyapunov stability theory, and it is verified that the system does not exhibit the Zeno phenomenon. Finally, the effectiveness of the proposed optimal scheduling method is verified by case analysis.
ResultsThe results show that the method can achieve the optimal operation of integrated energy system and effectively reduce the number of communications between neighbor nodes, lowering the burden on the communication network.
ConclusionAn integrated energy system composed of electric-heating-gas-cooling is given to verify the feasibility and effectiveness of the proposed method.
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