Investigation of the Dynamic Stability of Microgrid

Tang, Xisheng; Deng, Wei; Qi, Zhen

doi:10.1109/tpwrs.2013.2285585

Cited by 177 publications

(73 citation statements)

References 14 publications

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“…However, it is impossible to find a Lyapunov function candidate to obtain a limit lower than I max through the choice of w min from (18) because the closed-loop system (16) is an RL circuit with a voltage source. Note that the actual limit of I depends on the small parasitic resistance r. As it can be seen from (19), when the value of r is significant (not zero), the maximum limit of the current will reduce. However, the current-limiting property below I max is still guaranteed and this holds independently from the filter, i.e.…”

Section: Current-limiting Propertymentioning

confidence: 99%

Current-Limiting Droop Control of Grid-Connected Inverters

Zhong

Konstantopoulos

2017

IEEE Trans. Ind. Electron.

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Abstract-A current-limiting droop controller is proposed for single-phase grid-connected inverters with an LCL filter that can operate under both normal and faulty grid conditions. The controller introduces bounded nonlinear dynamics and, by using nonlinear input-to-state stability theory, the current-limiting property of the inverter is analytically proven. The proposed controller can be operated in the set mode to accurately send the desired power to the grid or in the droop mode to take part in the grid regulation, while maintaining the inverter current below a given value at all times. Opposed to the existing current-limiting approaches, the current limitation is achieved without external limiters, additional switches or monitoring devices and the controller remains a continuous-time system guaranteeing system stability. Furthermore, this is achieved independently from grid voltage and frequency variations, maintaining the desired control performance under grid faults as well. Extensive experimental results are presented to verify the droop function of the proposed controller and its current-limiting capability under normal and faulty grid conditions.

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Section: Current-limiting Propertymentioning

confidence: 99%

Current-Limiting Droop Control of Grid-Connected Inverters

Zhong

Konstantopoulos

2017

IEEE Trans. Ind. Electron.

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“…In addition, previous contributions have exposed that harmonic interactions phenomena arise in controlled microgrids; however, they have not been still fully explored and understood [1], [9], [13], [37]. Therefore, the inherent harmonic cross-coupling, the resonances of the system and the interaction among the network, the control and the power electronic devices, lead to the apparition of non-characteristic harmonic components which are supposed to not exist.…”

Section: Fast-time Domain Harmonic Assessmentmentioning

confidence: 99%

“…or unfavorable operating scenarios overlooked in the design and evaluation stages [1], [4], [5]. In this way, this gap has been recognized and recently addressed in the open literature, albeit incipient.…”

mentioning

confidence: 99%

Harmonic Issues Assessment on PWM VSC-Based Controlled Microgrids Using Newton Methods

Tinajero

Segundo

Gallardo

et al. 2018

IEEE Trans. Smart Grid

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Abstract-This paper presents the application of Newton-based methods in the time-domain for the computation of the periodic steady state solutions of microgrids with multiple distributed generation units, harmonic stability and power quality analysis. Explicit representation of the commutation process of the power electronic converters and closed-loop power management strategies are fully considered. Case studies under different operating scenarios are presented: grid-connected mode, islanded mode, variations in the Thevenin equivalent of the grid and the loads. Besides, the close relation between the harmonic distortion, steady state performance of the control systems, asymptotic stability and power quality is analyzed in order to evaluate the importance and necessity of using full models in stressed and harmonic distorted scenarios.

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“…It has been assumed that the asynchronous generator is ideal, and hence the generator power is given by [18]:…”

Section: Aerodynamics Subsystemmentioning

confidence: 99%

Pitch angle control of wind turbine systems in cold weather conditions using $$\mu$$ μ robust controller

Pourseif

Afzalian

2017

Int J Energy Environ Eng

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Wind turbine is a complex nonlinear system that the exact model of this system is not available, so it can be represented as an uncertain system. Thus, the control of this system is an important topic. Most of methods that design controllers for wind turbines consider these systems in suitable weather condition. While many turbines work in cold weather condition, in this paper, wind turbine is considered in cold weather, and in ice on turbine blades are considered as model uncertainties. A robust controller is designed for the wind turbine, in order to control the pitch angle. Performance of the proposed controller is evaluated in a comparison study.

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Investigation of the Dynamic Stability of Microgrid

Cited by 177 publications

References 14 publications

Current-Limiting Droop Control of Grid-Connected Inverters

Current-Limiting Droop Control of Grid-Connected Inverters

Harmonic Issues Assessment on PWM VSC-Based Controlled Microgrids Using Newton Methods

Pitch angle control of wind turbine systems in cold weather conditions using $$\mu$$ μ robust controller

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