Design of Passivity-Based Damping Controller for Suppressing Power Oscillations in DC Microgrids

Jeung, Yoon-Cheul; Lee, Dong-Choon; Dragičević, Tomislav; Blaabjerg, Frede

doi:10.1109/tpel.2020.3024716

Cited by 30 publications

(9 citation statements)

References 39 publications

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“…Moreover, the source and load concept is no longer necessary to be defined. Consequently, with the purpose of increasing the overall system passivity [80], the control structure could be simplified while maintaining a high control bandwidth. However, as proven in [16], the passivity margin criterion is a sufficient and unnecessary condition.…”

Section: ) Passivity-based Criteriamentioning

confidence: 99%

Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Peng

Buticchi

Tan

et al. 2022

IEEE Open J. Power Electron.

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Large-scale integration of renewable generation interfaced to the network through power electronic converters has led to drastic changes in power system dynamics. In islanded microgrids or weak grids, different control concepts for the synchronization of converters have been proposed to provide virtual inertia and improve their resilience against transient events, ensuring safe operation without heavy redundant design. The complexity of these power-related control algorithms and their interaction with the inner control loops causes problems in frequency components above the range of traditional studies which calls on modeling techniques with a wider bandwidth. This work aims to provide an outline of modeling methods for grid-connected converter dynamics from subsynchronous to switching sideband frequency range and relevant analyzing tools. The major contributions of this work are: 1. Theoretical foundations and the derivation processes are discussed for each of the modeling methods within the time domain, frequency domain and harmonic domain. 2. Similarities and differences between these methods are highlighted and recommendations are given regarding different grid situations. 3. A case study with an active front end converter is shown and the analysis results are validated by simulation and Hardwarein-the-Loop (HiL) test, illustrating the effectiveness of these methods.

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Section: ) Passivity-based Criteriamentioning

confidence: 99%

Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Peng

Buticchi

Tan

et al. 2022

IEEE Open J. Power Electron.

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“…In this sense, the voltage droop has been one of the most commonly adopted voltage regulation solutions in these microgrids. However, some articles have proposed modified versions of this classical voltage droop, see [23][24][25]. In particular, in [23], a disturbance observer has been designed for voltage regulation.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, in [23], a disturbance observer has been designed for voltage regulation. In Reference [24], a damping controller has been designed to avoid power oscillations. Reference [25] proposed an observer-based with both voltage droop and current feedforward control in a DC microgrid.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Azab

Serrano‐Fontova

2021

Electronics

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In this article, three evolutionary search algorithms: particle swarm optimization (PSO), simulated annealing (SA) and genetic algorithms (GA), have been employed to determine the optimal parameter values of the fractional-order (FO)-PI controllers implemented in the dual active bridge-based (DAB) DC microgrid. The optimum strategy to obtain the parameters of these FO-PI controllers is still a major challenge for many power systems applications. The FO-PI controllers implemented in the DAB are used to control the DC link voltage to the desired value and limit the current flowing through the converter. Accordingly, the investigated control system has six parameters to be tuned simultaneously; Kp1, Ki1, λ1 for FO-PI voltage controller and Kp2, Ki2, λ2 for FO-PI current controller. Crucially, this tuning optimization process has been developed to enhance the voltage stability of a DC microgrid. By observing the frequency-domain analysis of the closed-loop and the results of the subsequent time-domain simulations, it has been demonstrated that the evolutionary algorithms have provided optimal controller gains, which ensures the voltage stability of the DC microgrid. The main contribution of the article can be considered in the successful application of evolutionary search algorithms to tune the parameters of FO-based dual loop controllers of a DC microgrid scheme whose power conditioner is a DAB topology.

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“…For the complicated case of constant power load, an adaptive energy shaping control is developed to control DC-DC buckboost converter [40][41][42]. In [43][44][45][46], an interconnection and damping assignment PBC (IDA-PBC) is developed for DC-DC converters with CPL. The first problem of these works lies in that another sensor should be added to measure the output current for avoiding the measurement of CPL.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration

Namazi

Koofigar

et al. 2021

IET Power Electronics

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It is known that constant power load (CPL) may cause a negative impedance, which seriously affects the stability of power system. In this paper, a new control algorithm for DC–DC buck converter feeding unknown CPL is proposed. First, under the assumption of known extracted power load, the standard passivity–based control (PBC) is presented to reshape the system energy and compensate for the negative impedance and a proportion‐integration (PI) action around passive output is added to improve disturbance rejection performance, which forms the PBC plus PI (PBC+PI). Then, a parameter estimation algorithm is developed, based on immersion and invariance (I&I) technique, in order to online estimate the extracted power load. In the next step, the online estimation scheme is adopted to construct an adaptive strategy. Finally, the stability analysis of the cascaded system containing a closed‐loop control system and observer error dynamics is conducted. Simulation and experimental results are demonstrated to validate the performance of the proposed controller.

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Design of Passivity-Based Damping Controller for Suppressing Power Oscillations in DC Microgrids

Cited by 30 publications

References 39 publications

Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration

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