scholarly journals Hysteresis control for a grid connected dual-buck inverter

2020 ◽  
Vol 20 (1) ◽  
pp. 1-10
Author(s):  
Mario Andrés Bolaños-Navarrete ◽  
Juan David Bastidas-Rodríguez ◽  
Gustavo Adolfo Osorio
Keyword(s):  
Single Phase ◽  
Current Control ◽  
State Variables ◽  
Dead Band ◽  
Hysteresis Current Control ◽  
Energy Applications ◽  
Power Injection ◽  
The Dead ◽  
Error Dynamics ◽  
Hysteresis Control

Single-phase inverters are widely used in different renewable energy applications. Although the full-bridge inverter istypically used, dual-buck inverters provide an important advantage, since they eliminate the shoot-through problems. However, solutions proposed in the literature require additional inductors, use linear controllersdesigned around an operation point, or cannot be used in grid-connected applications. This paper presents a hysteresis current control of a single-phase dual-buck full-bridge inverter for grid-connected active power injection. Includes the dynamical modelin state variables, as well as analytical conditions to guarantee the evolution of the error dynamics in a set with boundaries defined by the designer. Moreover, the paper provides guidelines for the design of the dead band required for the transitions between the positive and negative semi-cycles (and vice-versa) of the grid voltage. Finally, simulation results validate the main features of the controller as well as the design of the dead band

An Adaptive Hysteresis Band Controller for Single Phase PV Inverters

2011 ◽  
Vol 354-355 ◽  
pp. 1333-1337
Author(s):  
Yang Xia ◽  
Hai Liang Tao ◽  
Ning Zhang
Keyword(s):  
Single Phase ◽  
Current Control ◽  
Frequency Variation ◽  
Switching Frequency ◽  
Small Range ◽  
Hysteresis Current Control ◽  
Simulink Simulation ◽  
Current Controller ◽  
The One ◽  
Hysteresis Control

Hysteresis current controllers are widely used in PV inverters. The main drawback of conventional hysteresis current control is that the switching frequency is variable, as the hysteresis band is fixed. In this paper an adaptive band hysteresis control algorithm with no derivative calculation is presented. As it will be shown, this algorithm can limit the switching frequency variation within a small range and the algorithm itself is simple and easy to be implemented. The performance of this algorithm, together with the one [10] and conventional hysteresis control has been evaluated by means of simulations performed with PSIM and SIMULINK. Simulation results show the effectiveness of the suggested hysteresis current controller.

scholarly journals Model Predictive Current Control with Fixed Switching Frequency and Dead-Time Compensation for Single-Phase PWM Rectifier

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 426 ◽  
Author(s):  
Longyun Kang ◽  
Jianbin Zhang ◽  
Hailan Zhou ◽  
Zixian Zhao ◽  
Xinwei Duan
Keyword(s):  
Single Phase ◽  
Dead Time ◽  
Prediction Equation ◽  
Current Control ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
Action Time ◽  
Optimal Action ◽  
The Dead ◽  
Dead Time Compensation

The research object of this paper is single-phase PWM rectifier, the purpose is to reduce the total harmonic distortion (THD) of the grid-side current. A model predictive current control (MPCC) with fixed switching frequency and dead-time compensation is proposed. First, a combination of an effective vector and two zero vectors is used to fix the switching frequency, and a current prediction equation based on the effective vector’s optimal action time is derived. The optimal action time is resolved from the cost function. Furthermore, in order to perfect the established prediction model and suppress the current waveform distortion as a consequence of the dead-time effect, the dead-time’s influence on the switching vector’s action time is analyzed, and the current prediction equation is revised. According to the experimental results, the conclusion is that, firstly, compared with finite-control-set model predictive control, proportional-integral-based instantaneous current control (PI-ICC) scheme and model predictive direct power control (MP-DPC), the proposed MPCC has the lowest current THD. In addition, the proposed MPCC has a shorter execution time than MP-DPC and has fewer adjusted parameters than PI-ICC. In addition, the dead-time compensation scheme successfully suppresses the zero-current clamping effects, and reduce the current THD.

scholarly journals Investigations on Hysteresis-Based Current Control Techniques for Grid Connected Photovoltaic Systems

2014 ◽  
Vol 12 (1) ◽  
pp. 32
Author(s):  
V. Rajini
Keyword(s):  
Control Strategy ◽  
Power Grid ◽  
Line Length ◽  
Current Control ◽  
Pv System ◽  
Control Techniques ◽  
Hysteresis Current Control ◽  
Performance Qualification ◽  
Effective Performance ◽  
Hysteresis Control

This paper focuses on delivering an effective performance qualification (PQ) control strategy for a grid connected photovoltaic (PV) system. A PV-based distributed generation system with a capacity of 10 kilo volt amps (kVA) was connected to the utility side of a power grid operating at 415 V. The power grid was modelled with a capacity of 100 kVA, 11 kV, and 100 km transmission line length. The PQ control strategy was implemented with three hysteresis-based current control techniques. To overcome the drawbacks of conventional hysteresis-control techniques, adaptive tuning of the hysteresis band was carried out, and a vector-based hysteresis current control is proposed to improve the results. 

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