Control Scheme for a Single-Phase Grid-Tied Voltage Source Converter With Reduced Number of Sensors

2014 ◽  
Vol 29 (7) ◽  
pp. 3758-3765 ◽  
Author(s):  
Sebastian Gomez Jorge ◽  
Jorge A. Solsona ◽  
Claudio A. Busada
Keyword(s):  
Single Phase ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Control Scheme

Adaptive SRF-PLL Based Voltage and Frequency Control of Hybrid Standalone WECS with PMSG-BESS

2018 ◽  
Vol 19 (6) ◽  
Author(s):  
Anjana Jain ◽  
R. Saravanakumar ◽  
S. Shankar ◽  
V. Vanitha
Keyword(s):  
Reactive Power ◽  
Frequency Control ◽  
Storage System ◽  
Synchronous Generator ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Operating Conditions ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Control Scheme

Abstract The variable-speed Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) attracts the maximum power from wind, but voltage-regulation and frequency-control of the system in standalone operation is a challenging task A modern-control-based-tracking of power from wind for its best utilization is proposed in this paper for standalone PMSG based hybrid-WECS comprising Battery Energy Storage System (BESS). An Adaptive Synchronous Reference Frame Phase-Locked-Loop (SRF-PLL) based control scheme for load side bi-directional voltage source converter (VSC) is presented for the system. MATLAB/Simulink model is developed for simulation study for the proposed system and the effectiveness of the controller for bi-directional-converter is discussed under different operating conditions: like variable wind-velocity, sudden load variation, and load unbalancing. Converter control scheme enhances the power smoothening, supply-load power-matching. Also it is able to regulate the active & reactive power from PMSG-BESS hybrid system with control of fluctuations in voltage & frequency with respect to varying operating conditions. Proposed controller successfully offers reactive-power-compensation, harmonics-reduction, and power-balancing. The proposed scheme is based on proportional & integral (PI) controller. Also system is experimentally validated in the laboratory-environment and results are presented here.

scholarly journals Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 506 ◽  
Author(s):  
Patrobers Simiyu ◽  
Ai Xin ◽  
Kunyu Wang ◽  
George Adwek ◽  
Salman Salman
Keyword(s):  
Optimal Power Flow ◽  
Distribution Network ◽  
Hierarchical Control ◽  
Active Power ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Voltage ◽  
Medium Voltage ◽  
Control Scheme ◽  
Medium Voltage Dc

In this research study, a multiterminal voltage source converter (VSC) medium voltage DC (MVDC) distribution network hierarchical control scheme is proposed for renewable energy (RE) integration in a co-simulation environment of MATLAB and PSCAD/EMTDC. A DC optimal power flow (DC OPF) secondary controller is created in MATLAB. In PSCAD/EMTDC, the main circuit containing the adaptive DC voltage droop with a dead band and virtual synchronous generator (VSG) based primary controller for the VSCs is implemented. The simulation of the MVDC network under the proposed hierarchical control scheme is investigated considering variations in wind and solar photovoltaic (PV) power. The network is also connected to the standard IEEE-39 bus system and the hierarchical scheme tested by assessing the effect of tripping as well as restoration of the REs. The results show that during random variations in active power such as increasing wind and PV power generation, a sudden reduction or tripping of wind and PV power, the primary controller ensures accurate active power sharing amongst the droop-based VSCs as well as regulates DC voltage deviations within the set range of 0.98–1.02 pu with an enhanced dynamic response. The DC OPF secondary control optimizes the system’s losses by 38% regularly giving optimal droop settings to the primary controllers to ensure proper active power balance and DC voltage stability. This study demonstrates that the hierarchical control strategy is effective for RE integration in the MVDC distribution network.

scholarly journals Feedforward Harmonic Mitigation Strategy for Single-Phase Voltage Source Converter

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Qing Zhong ◽  
Junjie Feng ◽  
Gang Wang ◽  
Haifeng Li
Keyword(s):  
Single Phase ◽  
Control Strategies ◽  
Mitigation Strategy ◽  
Voltage Source ◽  
Effective Control ◽  
Voltage Source Converter ◽  
Phase Voltage ◽  
Analysis Model ◽  
Harmonic Pollution ◽  
Harmonic Mitigation

With the development of distributed generations (DGs), single-phase voltage source converter (SPVSC) has been widely used, but it brings about the problem of harmonic pollution to power grid. Hence, it is significant to explore the mechanism of harmonic injection from SPVSC and propose effective control strategies to mitigate the harmonic pollution. In this paper, a harmonic analysis model of SPVSC based on dynamic phasor (DP) has been established. With the model, the harmonics interaction between the ac side and the dc side can be analyzed with the consideration of the control strategies, which reveals the generation mechanism of the harmonics in SPVSC. Based on the mechanism, a feedforward harmonic mitigation strategy has been presented. The principle of the strategy is to add low-order harmonic signal to the PWM modulation signals to reduce the harmonic current on the ac side. The harmonic mitigation strategy not only has clear physical meaning and fast calculation, but also is robust for the uncertainty of parameters. Finally, the simulation and experiment results demonstrate the correctness of the model and the effectiveness of the harmonic mitigation strategy.

scholarly journals Hybrid Renewable Resource Power Generation using Back to Back Voltage Source Converter with Output Regulation

2020 ◽  
pp. 297-302
Author(s):  
Prabaakaran K ◽  
Senthil Kumar R ◽  
Pradeep Katta ◽  
Jain Vinith P R ◽  
Ashok S ◽  
...  
Keyword(s):  
Energy Demand ◽  
Rapid Development ◽  
Renewable Resource ◽  
Output Regulation ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Rate ◽  
Control Scheme ◽  
Rotating Reference Frame ◽  
Cogeneration System

There is a massive and rapid development in the industry and prevailing population inflation due to which the energy demand spikes. The increase in demand dilates the gap between the energy supplied and usage which makes the power quality important to consider, otherwise it causes voltage, current or frequency deviations which has unfavourable consequences in customer’s equipment or result in failure. To overcome this the concept of complementary usage of wind and solar cogeneration system is introduced along with the topology with Neutral Point Clamped inverter which has 3-level output converter that decreases the harmonics and the switching rate, it also features the regulation of the VSC through fuzzy based control scheme in the rotating reference frame of wind-solar cogeneration system with no extra DC/DC conversion stages.

scholarly journals DESIGN AND SIMULATION STUDIES OF D-STATCOM FOR VOLTAGE SAG, SWELL MITIGATION

2013 ◽  
pp. 169-175
Author(s):  
D.R. PATIL ◽  
KOMAL K. MADHALE
Keyword(s):  
Distribution System ◽  
Voltage Source ◽  
Voltage Sag ◽  
Voltage Source Converter ◽  
Voltage Sags ◽  
Simulation Studies ◽  
Control Scheme ◽  
Static Compensator ◽  
A Current

This paper presents the design of a prototype distribution static compensator (DSTATCOM) for voltage sag mitigation in an unbalanced distribution system. The D-STATCOM is intended to replace the widely used static Var compensator (SVC). The model is based on the Voltage Source Converter (VSC) principle. A new PWM based control scheme has been implemented to control the electronic valves in two level of VSC. The D-STATCOM injects a current into the system to mitigate the voltage sags. In this work, the 6-pulse D-STATCOM configuration with IGBT has been designed using MATLAB SIMULINK. Accordingly, simulations are first carried out to illustrate the use of D-STATCOM in mitigating voltage sag in a distribution system. Simulation results prove that the D-STATCOM is capable of mitigating voltage sag as well as improving power quality of a system.

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