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Using a doubly-fed induction generator (DFIG), with an additional active or reactive damping controller, is a new method of suppressing the inter-area oscillation of a power system. However, using active power modulation (APM) may decrease the damping of the shaft oscillation mode of a DFIG and the system damping target cannot be achieved through reactive power modulation (RPM) in some cases. Either single APM or RPM does not consider system damping and torsional damping simultaneously. In this paper, an active-reactive coordinated dual-channel power modulation (DCPM) damping controller is proposed for DFIGs. First, considering the electromechanical parts and control structure of the wind turbine, an electromechanical transient model and an additional damping controller model of DFIGs are established. Then, the dynamic objective function for coordinating the parameters of the additional damping controller is proposed. The ratio between the active power channel and reactive power channel modulation is derived from the parameters optimized by the particle swarm optimization algorithm. Finally, the effectiveness and practicability of the designed strategy is verified by comparing it with a traditional, simple damping controller design strategy. Standard simulation system examples are used in the comparison. Results show that the DCPM is better at maximizing the damping control capability of the rotor-side controller of a DFIG and simultaneously minimizing adverse effects on torsional damping than the traditional strategy.
Guowei Cai; Xiangsong Chen; Zhenglong Sun; Deyou Yang; Cheng Liu; Haobo Li; Cai; Chen; Sun; Yang; Liu; Li. A Coordinated Dual-Channel Wide Area Damping Control Strategy for a Doubly-Fed Induction Generator Used for Suppressing Inter-Area Oscillation. Applied Sciences 2019, 9, 2353 .
AMA StyleGuowei Cai, Xiangsong Chen, Zhenglong Sun, Deyou Yang, Cheng Liu, Haobo Li, Cai, Chen, Sun, Yang, Liu, Li. A Coordinated Dual-Channel Wide Area Damping Control Strategy for a Doubly-Fed Induction Generator Used for Suppressing Inter-Area Oscillation. Applied Sciences. 2019; 9 (11):2353.
Chicago/Turabian StyleGuowei Cai; Xiangsong Chen; Zhenglong Sun; Deyou Yang; Cheng Liu; Haobo Li; Cai; Chen; Sun; Yang; Liu; Li. 2019. "A Coordinated Dual-Channel Wide Area Damping Control Strategy for a Doubly-Fed Induction Generator Used for Suppressing Inter-Area Oscillation." Applied Sciences 9, no. 11: 2353.
In this paper, a novel nonlinear robust damping controller is proposed to suppress power oscillation in interconnected power systems. The proposed power oscillation damping controller exhibits good nonlinearity and robustness. It can consider the strong nonlinearity of power oscillation and uncertainty of its model. First, through differential homeomorphic mapping, a mathematical model of the system can be transformed into the Brunovsky standard. Next, an extended state observer (ESO) estimated and compensated for model errors and external disturbances as well as uncertain factors to achieve dynamic linearization of the nonlinear model. A power oscillation damping controller for interconnected power systems was designed on a backstepping-fractional order sliding mode variable structure control theory (BFSMC). Compared with traditional methods, the controller exhibits good dynamic performance and strong robustness. Simulations involving a four-generator two-area and partial test system of Northeast China were conducted under various disturbances to prove the effectiveness and robustness of the proposed damping control method.
Cheng Liu; Guowei Cai; Jiwei Gao; Deyou Yang. Design of Nonlinear Robust Damping Controller for Power Oscillations Suppressing Based on Backstepping-Fractional Order Sliding Mode. Energies 2017, 10, 676 .
AMA StyleCheng Liu, Guowei Cai, Jiwei Gao, Deyou Yang. Design of Nonlinear Robust Damping Controller for Power Oscillations Suppressing Based on Backstepping-Fractional Order Sliding Mode. Energies. 2017; 10 (5):676.
Chicago/Turabian StyleCheng Liu; Guowei Cai; Jiwei Gao; Deyou Yang. 2017. "Design of Nonlinear Robust Damping Controller for Power Oscillations Suppressing Based on Backstepping-Fractional Order Sliding Mode." Energies 10, no. 5: 676.
As an important part of the smart grid, a wide-area measurement system (WAMS) provides the key technical support for power system monitoring, protection and control. But 20 uncertainties in system parameters and signal transmission time delay could worsen the damping effect and deteriorate the system stability. In the presented study, the subspace system identification technique (SIT) is used to firstly derive a low-order linear model of a power system from the measurements. Then, a novel adaptive wide-area damping control scheme for online tuning of the wide-area damping controller (WADC) parameters using the residue method is proposed. In order to eliminate the effects of the time delay to the signal transmission, a simple and practical time delay compensation algorithm is proposed to compensate the time delay in each wide-area control signal. Detailed examples, inspired by the IEEE test system under various disturbance scenarios, have been used to verify the effectiveness of the proposed adaptive wide-area damping control scheme.
Guowei Cai; Deyou Yang; Cheng Liu. Adaptive Wide-Area Damping Control Scheme for Smart Grids with Consideration of Signal Time Delay. Energies 2013, 6, 4841 -4858.
AMA StyleGuowei Cai, Deyou Yang, Cheng Liu. Adaptive Wide-Area Damping Control Scheme for Smart Grids with Consideration of Signal Time Delay. Energies. 2013; 6 (9):4841-4858.
Chicago/Turabian StyleGuowei Cai; Deyou Yang; Cheng Liu. 2013. "Adaptive Wide-Area Damping Control Scheme for Smart Grids with Consideration of Signal Time Delay." Energies 6, no. 9: 4841-4858.