Analysis of Hydro-Coupled Power Plants and Design of Robust Control to Damp Oscillatory Modes

Pico, Hugo N. Villegas; Aliprantis, Dionysios; McCalley, James D.; Elia, Nicola; Castrillón, N. J.

doi:10.1109/tpwrs.2014.2333002

Cited by 27 publications

(6 citation statements)

References 17 publications

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“…By carrying out the Laplace transform of (6) and (12), the system transfer function can be derived as…”

Section: Control Loop Selectionmentioning

confidence: 99%

“…For different types of signals, such as generator speed, line transmission power, and bus voltage, the amplitude of the above-mentioned residual value will not be accurate due to the ratio problem. In [12], a relative gain array (RGA) method is proposed. Although this method reduces the mutual influence among multiple controllers, it has the same disadvantages as the residual method.…”

Section: Introductionmentioning

confidence: 99%

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Wide-Area Damping Controller Design Based on the Frequency Domain Self-Excitation Method

Gao

Ma²,

Nie

et al. 2018

Journal of Control Science and Engineering

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In this paper, a wide-area DC damping controller design method is proposed to damp the weak interarea oscillation modes. First, the low-order power system control model identification method is proposed based on the frequency domain self-excitation method to obtain the dominant modes and other related information. In what follows, the identified model is transformed into a low-order state space equation. By comparing the geometric metrics of different schemes, the various input signals and installation locations of the controller are selected. Furthermore, the damping controller parameter calculation is realized based on the self-excitation frequency domain identification method, which does not depend on the detailed model of the system. The design process is simple and it is easy to apply in the practical engineering of large-scale complex power grids. The applicability and effectiveness of the proposed controller design method are demonstrated through simulations of a two-area four-generator power system.

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“…By carrying out the Laplace transform of (6) and (12), the system transfer function can be derived as…”

Section: Control Loop Selectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wide-Area Damping Controller Design Based on the Frequency Domain Self-Excitation Method

Gao

Ma²,

Nie

et al. 2018

Journal of Control Science and Engineering

View full text Add to dashboard Cite

show abstract

“…(2). Problem (13) can be solved and the model parameters Â i estimated by using approaches such as prediction error methods or numerical methods (e.g., Newton and quasi-Newton algorithms) [35]. In this case, the PWA system dynamics is required to be continuous, that is, the PWA map (intersection of the polyhedral regions) is required to be continuous [17,36,37], which is the case presented in this work.…”

Section: Hydraulic Amplifier Parameter Estimationmentioning

confidence: 99%

“…The results showed that nonlinearities tend to produce sustained frequency oscillations, and they consequently proposed a method for selecting the controller parameters such that the oscillation level became acceptable. Recently, [13] described the design of a robust controller for coupled turbines in which the hydraulic amplifier nonlinearities (saturation and dead band type) were represented by a system with uncertain parameters for design purposes.…”

Section: Introductionmentioning

confidence: 99%

Semi-physical piecewise affine representation for governors in hydropower system generation

Donaisky

Oliveira

Santos

et al. 2016

Electric Power Systems Research

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“…Based on the phenomenon of ultra-low frequency oscillation in Colombia power grid, the influence of turbine model and controller on oscillation is studied by time-domain simulation method in reference [6], and a method to suppress ultra-low frequency oscillation by adding thermal power units is proposed. In reference [7], the stability of the system is analyzed through the linear and nonlinear models of hydraulic turbines, and the mechanism of ultra-low frequency oscillation is studied by using the limit cycle in the nonlinear model. In reference [8], a method for on-line evaluation of generator damping characteristics based on energy flow is proposed and applied to online analysis and emergency control of ultra-low frequency oscillation.…”

Section: Introductionmentioning

confidence: 99%

Optimal Control Strategy of Turbine Governor Parameters Based on Improved Beetle Antennae Search Algorithm

Kong

Yang

2021

Teh. vjesn.

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Aiming at the occurrence of long-term and ultra-low frequency oscillations in the hydropower network system, this paper derives the generalized turbine transfer function speed control system model including the flow factor Tpq based on the generalized turbine model, and analyzes the influence of Tpq and PID parameters on the ultralow frequency damping of the hydraulic turbine governing system. In order to better suppress the ultra-low frequency oscillation caused by improper PID parameter settings, a comprehensive optimization objective function reflecting damping and turbine speed deviation index (ITAE) in ultra-low frequency band is established. Based on the fast and efficient optimization strategy of Beetle Antennae Search, an improved beetle antennae particle swarm optimization is constructed. In single-machine and multi-machine systems, the improved algorithm is compared with different optimization algorithms. The simulation results show that the improved algorithm can overcome the slow convergence speed and easily fall into local optimization problem, effectively improve the damping level of hydraulic turbine governing system in ultra-low frequency, and is more effective and superior than other optimization algorithms. It provides a new way of thinking and technical means to suppress the ultra-low frequency oscillation by optimizing the parameters of the speed control system.

show abstract

Analysis of Hydro-Coupled Power Plants and Design of Robust Control to Damp Oscillatory Modes

Cited by 27 publications

References 17 publications

Wide-Area Damping Controller Design Based on the Frequency Domain Self-Excitation Method

Wide-Area Damping Controller Design Based on the Frequency Domain Self-Excitation Method

Semi-physical piecewise affine representation for governors in hydropower system generation

Optimal Control Strategy of Turbine Governor Parameters Based on Improved Beetle Antennae Search Algorithm

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