Current Sensorless Control for Dual Active Bridge DC–DC Converter with Estimated Load-Current Feedforward

Xiong, Fei; Wu, Junyong; Liu, Zicheng; Lv, Hao

doi:10.1109/tpel.2017.2705344

Cited by 72 publications

(42 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Type I-A is not applicable for operations with a converter gain close to unity as indicated by (4). Both II-A and II-B have some limitations given by (17), (18), (22), and (23). Generally, II-A FLM is not suitable when the gain d is much large and II-B FLM cannot be adopted for operations with a very small d. Type III FLM has the simplest results, which are independent of d. However, it may generate a high temporal peak current during the transient process in some cases.…”

Section: Performance Comparisonmentioning

confidence: 99%

See 1 more Smart Citation

Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Tang

Zhou

et al. 2019

IET Power Electronics

View full text Add to dashboard Cite

The procedure of load transition in a dual-active-bridge converter is expected to be fast and spike free. To achieve such a goal, the total required adjustment of phase-shift angles should be assigned to different switch arms properly. This study discusses all possible combinations of two switch arms and their related phase-shifts, which could result in several different solutions. By forcing a zero algebraic variation of the volt-second product, all solutions can keep the volt-second balance of the power inductor so that no risk of magnetic saturation in the transient state exists. The possibility of temporal overshoot current can be checked by verifying the monotonicity of the intermediate volt-second product. A comparison of all solutions is made to give a suggestion for their feasibility. Experimental tests are included at last which validated the theoretical analysis.

show abstract

Section: Performance Comparisonmentioning

confidence: 99%

“…However, the response time to a load change command would be long. In the literature, there are different types of solutions reported [16][17][18][19][20][21][22][23][24][25][26]. The direct flux control is costly with an extra magnetic sensor and associated connection.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Tang

Zhou

et al. 2019

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…The dual active bridge converter is a kind of DC-DC converter that have bidirectional power flow, galvanic isolation with high frequency transformer, high efficiency and high density features [8,11,12]. The DAB is a converter based on two active bridges interconnected through a high frequency transformer as depicted in Fig.…”

Section: Operating Principle Convertermentioning

confidence: 99%

Online PSO-tuned phase shift angle controller for dual active bridge DC–DC converter

et al. 2019

View full text Add to dashboard Cite

The deep concern towards efficient and green energy has brought to the development of intermediate energy storage system. Electric vehicles (EVs), for example, is an application where the energy storage devices are vital. In EV, the bidirectional DC-DC converter is high in demand due to its nature EV of having two or more separate DC sources. A recent technology called the dual active bridge (DAB) converter has quickly become popular in DC-DC converter thanks to its inherent galvanic isolation via a high-frequency transformer. Furthermore, DAB topology allows for high-efficiency conversion and soft switching adaption. This paper presents the optimization of the phase shift angle controller of DAB using Particle Swarm Optimization (PSO). From the preliminary study, it was found out that the optimization performs well until there are abrupt changes in the system. The system is not able to respond to the reference voltage step change as the traditional one-time execution PSO have local optima entrapped in react to the changes. The paper proposes a reset function to allow PSO to identify that its current optimized value is not optimal anymore. This drives PSO to look for a new optimal value to improve DAB's overall dynamic performance. Simulation of the modified PSO is done on a 200 kW DAB system with 20 kHz switching frequency is developed in MATLAB/Simulink environment. Simulation has been carried out with the objective to minimize the steady-state error as well as to improve the dynamic performance of the DAB. The DAB performance with the proposed solution is evaluated in terms of steady-state error and transient response by testing the system under various reference voltage and step-change input voltage. The self-excited re-exploration PSO also have been presented as to respond to the reference voltage step change as the basic PSO have local optima entrapped in react to the changes. In order to validate the simulation results, a hardware-in-the-loop (HIL) experimental circuit is built in Typhoon HIL-402 to verify the dynamic response and the steady state performance of the system.

show abstract

“…In fact, the sensorless current control technique has been popularly applied for unidirectional DC/DC converters [13][14][15]. Recently, it is also applied for controlling DAB converters [16][17][18][19]. In [16], the load current is estimated by a nonlinear disturbance observer (NDO) and is then fed-forward to the voltage control loop to improve the dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, it is also applied for controlling DAB converters [16][17][18][19]. In [16], the load current is estimated by a nonlinear disturbance observer (NDO) and is then fed-forward to the voltage control loop to improve the dynamic performance. Although the NDO can estimate the current, the design procedures seem to be relatively complicated with many design parameters.…”

Section: Introductionmentioning

confidence: 99%

Sensorless Control of Dual-Active-Bridge Converter with Reduced-Order Proportional-Integral Observer

et al. 2018

View full text Add to dashboard Cite

When controlling a Dual-Active-Bridge (DAB) DC/DC converter, the high frequency terminal current is usually measured for use in the current feedback controller. In order to measure that current, a wide bandwidth sensor accompanied with high-speed amplifiers are required. Furthermore, a high Analog-to-Digital sampling rate is also necessary for sampling and processing the measured data. To avoid those expensive requirements, this paper proposes an alternative control method for the DAB converter. In the proposed method, the terminal current is estimated by a reduced-order proportional integral observer. A technique is also proposed to reduce the phase drift effect when the voltages at two terminals are not matched. Afterwards, a combined current feedforward-voltage feedback control system is developed to enhance the system dynamics and to regulate the output voltage. This control system needs only the information of the terminal voltages and no current sensor is required. Experimental results show that the observer can estimate the terminal current very quickly with the accuracy of more than 98%. In addition, the output voltage is well regulated with a fluctuation of less than ±2.6% and a settling time of less than 6.5 ms in the presence of a 30% load change.

show abstract

Current Sensorless Control for Dual Active Bridge DC–DC Converter with Estimated Load-Current Feedforward

Cited by 72 publications

References 28 publications

Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Online PSO-tuned phase shift angle controller for dual active bridge DC–DC converter

Sensorless Control of Dual-Active-Bridge Converter with Reduced-Order Proportional-Integral Observer

Contact Info

Product

Resources

About