Frequency domain analysis of three phase linear current regulators

Zmood, D.N.; Holmes, D.G.; Bode, G.H.

doi:10.1109/ias.1999.801601

Cited by 336 publications

(39 citation statements)

References 5 publications

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“…The principle scheme of p q i i − detection method is shown in Fig.3. In the p q i i − detection method, only sin t ω , cos t ω − do take part in computing, and the harmonics of power grid distortion don't, so the detection result isn't effected by the distortion voltage of power grid, which warrants the detection result of three-phase harmonic and reactive component accurate in the case of non-sinusoidal or nonsymmetric three-phase voltage [17]. The method is realized by analog circuit conventionally, which is complex in the hardware and is restricted in the precision.…”

Section: B the Detection Methods Of Reactive Power And Harmonic Currentmentioning

confidence: 99%

Research on the Novel Grid-Connected System of Distributed Generation

Chen

Sun

Geng-guo

2009

2009 International Conference on Energy and Environment Technology

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The grid-connected operating mode of distributed generation (DG) is now the trend of the development of DG. In this paper, the topology and mathematical model of a gridconnected system of DG are studied deeply, instantaneous reactive power theory and hysteretic comparison control strategy have been chosen, and a grid-connected system is got which can send the active power to the grid, compensate harmonic and absorb the reactive power that the local loads generated. Then the simulation models of main circuit and control circuit of the grid-connected system of DG have been established using MATLAB, and the two different filter modes of the grid-connected system are analyzed and simulated which verified the grid-connected system reliable and valid.

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Section: B the Detection Methods Of Reactive Power And Harmonic Currentmentioning

confidence: 99%

Research on the Novel Grid-Connected System of Distributed Generation

Chen

Sun

Geng-guo

2009

2009 International Conference on Energy and Environment Technology

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“…controllers could be implemented either as PR regulators in the abc stationary frame, or as PI regulators in the dq synchronous rotating frame (the two methods are actually equivalent as has been shown in [12]). However, the central precept of the current regulation strategy presented in this paper is to deliberately operate the PR controller away from its tuned resonant frequency to achieve a current regulator phase shift error.…”

Section: Power Sharing With Unequal Power Ratingsmentioning

confidence: 99%

Voltage-frequency control of an islanded microgrid using the intrinsic droop characteristics of resonant current regulators

Shoeiby

Davoodnezhad

Holmes

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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The Distributed Generators (DGs) of an islanded microgrid must be carefully controlled to regulate voltage and frequency, and to share power evenly between the DG sources. This is normally achieved by operating the microgrid Voltage Source Inverters (VSIs) in voltage controlled mode, so that the microgrid voltages and frequency can be explicitly regulated. However, this results in the loss of direct control of the VSI current, and potentially introduces the need for communication between DG units to maintain robust coordination between DG sources. This paper presents a new approach for islanded microgrid operation, where all VSIs are operated in current regulated mode. By taking advantage of the hitherto unrecognised intrinsic droop characteristic of a PR current regulated VSI, frequency regulation, voltage regulation and power sharing can be achieved across the islanded microgrid without requiring either explicit external control or direct communication between the DG units. Simulation and experimental results are presented to verify the performance of the new approach. I.978-1-4799-5776-7/14/$31.00 ©2014 IEEE

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“…The capacitor voltage is first converted to equivalent stationary frame signals V α , V b then these are compared with the Stationary frame reference signals V α *, V b * and an errors e α and e b are generated which is given to the sinusoidal signal integrator [5]. The outputs of this voltage compensator I α , I b are then fed to an inner capacitor current compensator, acting as the capacitor current reference signals for this inner compensator.…”

Section: A Inner Voltage and Current Control Loopsmentioning

confidence: 99%

Microgrid system advanced control in islanded and grid connected mode

Gautam

2014

2014 IEEE International Conference on Advanced Communications, Control and Computing Technologies

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This paper presents an advanced controller for the Microgrid system which can operate in grid connected mode and Islanded mode. The presented controller is designed such that it can be used by each Distributed Generation (DG) systems in the Microgrid. Two control schemes algorithms are presented firstly inner current and voltage control loop are proposed for controlling output of three phase grid interfacing inverter and secondly external real and reactive power control loops which incorporates the droop controller for controlling real and reactive power output and facilitating robust and accurate power sharing between DGs once the Microgrid is Islanded due to some utility grid faults. The controller is able to switch between different operating transitions modes for example from Islanded to Grid connected mode after proper resynchronization without affecting the critical loads. The performances of presented controller have been verified in the Matlab/Simulink simulation.

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Frequency domain analysis of three phase linear current regulators

Cited by 336 publications

References 5 publications

Research on the Novel Grid-Connected System of Distributed Generation

Research on the Novel Grid-Connected System of Distributed Generation

Voltage-frequency control of an islanded microgrid using the intrinsic droop characteristics of resonant current regulators

Microgrid system advanced control in islanded and grid connected mode

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