Proceedings Article10.1109/APEC.2017.7931074
A multi-loop controller for LCL-filtered grid-connected converters integrated with a hybrid harmonic compensation and a novel virtual impedance
Yonghwan Cho,Maziar Mobarrez,Subhashish Bhattacharya +2 more
- 01 Mar 2017
- pp 2658-2663
3
TL;DR: In this paper, a multi-loop controller is proposed as one possible alternative to the conventional grid current controller to improve the harmonic compensation performance by using both HCCs and HVCs, which is a hybrid harmonic compensation (HHC).
read more
Abstract: The LCL-filtered converter is widely adapted to interface renewable energy sources and energy storage devices to the grid While the LCL filter is capable of eliminating current harmonics caused by the high-frequency PWM of the converter, low-order current harmonics are reduced selectively by the stationary-frame resonant harmonic compensators (HCs) There are two types of the harmonic compensator, namely, harmonic current compensator (HCC) and harmonic voltage compensator (HVC) HCCs are in general embedded in parallel with conventional grid current controllers by which the active and reactive power are regulated If autonomous islanding operation is required, the active and reactive power are controlled by a V-f droop method and a filter capacitor voltage controller with which HCCs or HVCs are added in parallel In this paper, a multi-loop controller is proposed as one possible alternative to the conventional grid current controller to improve the harmonic compensation performance by using both HCCs and HVCs, which is a hybrid harmonic compensation (HHC) In addition, a novel virtual impedance implementation technique which fits to the multi-loop frame is presented to maintain stability of the controller in case of large grid impedance
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Second-Harmonic Current Reduction for Two-Stage Inverter With Boost-Derived Front-End Converter: Control Schemes and Design Considerations
Li Zhang,Xinbo Ruan,Xiaoyong Ren +2 more
TL;DR: In this paper, a two-stage single-phase inverter with a boost-derived front-end converter was designed to reduce the second-harmonic current (SHC) by using virtual series impedance.
140
An LCL filter with an active compensation for a fast charger station
Saeid Haghbin,Torbjorn Thiringer,Mikael C D Alatalo,Robert Karlsson +3 more
- 01 Jun 2017
TL;DR: In this paper, an LCL filter was designed and constructed for the AC/DC stage of a 50 kW fast charger station which is a three-phase pulse width modulated (PWM) converter and an active compensator was proposed to enhance the converter power factor by modification of the reference q current.
7
Influences on resonances between EMI filter capacitors and the utility grid
Markus Bienholz,Gerd Griepentrog +1 more
- 22 Feb 2018
TL;DR: The differential mode parallel resonance between capacitors of an EMI filter with the inductance of the utility grid is discussed as well as the filters internal common mode resonance.
References
Proportional-resonant controllers and filters for grid-connected voltage-source converters
Remus Teodorescu,Frede Blaabjerg,Marco Liserre,Poh Chiang Loh +3 more
- 09 Oct 2006
TL;DR: The proportional-resonant (PR) controllers and filters, and their suitability for current/voltage control of grid-connected converters, are described in this article.
1.7K
An Accurate Power Control Strategy for Power-Electronics-Interfaced Distributed Generation Units Operating in a Low-Voltage Multibus Microgrid
Yun Wei Li,Ching-Nan Kao +1 more
TL;DR: In this article, a power control strategy for a low-voltage microgrid is proposed, where the mainly resistive line impedance, the unequal impedance among distributed generation (DG) units, and the microgrid load locations make the conventional frequency and voltage droop method unpractical.
1.2K
A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems
TL;DR: In this paper, a novel control strategy for parallel inverters of distributed generation units in an AC distribution system is presented, based on the droop control method, using only locally measurable feedback signals.
1.1K
A Flexible Harmonic Control Approach Through Voltage-Controlled DG–Grid Interfacing Converters
TL;DR: A novel harmonic control scheme using a voltage-controlled method is developed, which is more flexible and has similar compensation performance compared to the conventional current- controlled method.
467
High-Performance Digital Resonant Controllers Implemented With Two Integrators
TL;DR: In this paper, a simple expression to calculate the target leading angle, in delay compensation schemes, is also proposed to improve stability margins by means of a better accuracy than previous approaches, and experimental results obtained with a laboratory prototype corroborate the theoretical analysis and the improvement achieved by the proposed discrete-time implementations.
306