A Simple Smooth Transition Technique for the Noninverting Buck–Boost Converter

Journal of Electrical Systems and Inf Technol

2020

IntroductionIn today's technology worldwide, lots of changes are happening in almost all the domains. Most of the domains run on electric power which is being generated using sources like thermal, coal, nuclear, gas and so on. But these sources are non-renewable sources that results in shortage of electric power in long run. Since the world is addicted to usage of technology and if there is no power available over which technology runs, world is going to end with traditional life style, and therefore the existing technology is working on some findings using which electric power is generated from renewable sources like solar energy, wind energy and fuel cell, etc. [1][2][3]. Output of these sources are DC power which can be stored using batteries when excess power is generated and at the same time when no power is available then power stored in batteries can be taken back for the loads also the energy generated by these renewable sources is fluctuating Abstract This article presents the characterization of analog and digital control loops using PID/ PIDN control algorithms for bidirectional buck-boost converter (BBC). Control loops of BBC are designed and implemented in MATLAB code using transfer functions in time domain with unit step response and in frequency domain with bode plots and pole-zero plots. These transfer functions are obtained by average large signal modeling of BBC. Actions of analog and digital control loops are characterized in order to ensure stability and dynamic response of BBC which is a bottleneck in renewable energy applications. Improvement in dynamic response and stability of BBC with PIDN control algorithm is demonstrated using bode plots, pole-zero plots, and step response. Control loop gain due to transfer functions of power stage and controllers is demonstrated, and it is found stable in both analog and digital control loops. PIDN compensator is proposed to maintain a healthy balance between the stability and transient behavior since both are indirectly proportional. BBC is modeled using average large signal modeling technique, simulated using MATLAB tool, and analysis of dynamic and stability response is done through unit step input, bode plot, and pole-zero plot. Hardware is designed and implemented using TMS320F28335 controller.

Section: (Ii) Stabilitymentioning

confidence: 99%

Characterization of analog and digital control loops for bidirectional buck–boost converter using PID/PIDN algorithms

Viswanatha¹,

Reddy

Journal of Electrical Systems and Inf Technol

2020

“…Considering the design specifications given in the table I, the transfer function of boost mode (TF boost ) is obtained using eqns (1) and (2) and it is shown in eqn (5) also the transfer function of buck mode (TF buck ) is obtained using (3) and (4) and it is shown in eqn (6) .…”

Section: Modelingmentioning

confidence: 99%

Stability and Dynamic Response of Analog and Digital Control loops of Bidirectional buck-boost Converter for Renewable Energy Applications

Viswanatha¹,

R²,

2019

Preprint

 Abstract: This article presents the stability and dynamic response of open loop and closed loop control of Bidirectional buck-boost converter(BBC) using PID and PIDN controllers through transfer function model implemented in MATLAB code. In order to ensure the stability of switch mode power supplies the control loop behaviors need to be characterized. Improvement of stability of BBC using PID/PIDN compensators is demonstrated in both analog and digital domains by plotting bode plots. Step response of BBC using PID /PIDN controllers are plotted that defines the dynamic behavior of the system.PIDN compensator is proposed to maintain a healthy balance between the stability and transient behavior since both are indirectly proportional.

“…However analog controllers hinders practical realization of the advanced control schemes , environmental conditions highly susceptible to the aging effects and limits the possibilities of implementing the operational dead-zone avoidance algorithms. [1]- [4]. The digital implementation in modern DSP controllers offers simpler implementation of complex control algorithms, higher robustness to noise and higher flexibility to changes in input/output parameters of the systems [11].…”

Section: Stabilitymentioning

confidence: 99%

Stability and Dynamic Response of Analog and Digital Control loops of Bidirectional buck-boost Converter for Renewable Energy Applications

V¹,

R²,

2019

IJRTE

This article presents the stability and dynamic response of open loop and closed loop control of Bidirectional buck-boost converter(BBC) using PID and PIDN controllers through transfer function model implemented in MATLAB code. In order to ensure the stability of switch mode power supplies the control loop behaviors need to be characterized. Improvement of stability of BBC using PID/PIDN compensators is demonstrated in both analog and digital domains by plotting bode plots. Step response of BBC using PID /PIDN controllers are plotted that defines the dynamic behavior of the system.PIDN compensator is proposed to maintain a healthy balance between the stability and transient behavior since both are indirectly proportional.