Controller Design for the Rating-Proportional Current Sharing in Modular Hybrid Critical Load Substation Transformers

2021 ◽  
Author(s):  
Yos Prabowo ◽  
Vishnu Mahadeva Iyer ◽  
Subhashish Bhattacharya ◽  
Eddy Aeloiza
Keyword(s):  
Critical Load ◽  
Controller Design ◽  
Current Sharing

Loop‐shaping method based current sharing controller design for parallel DC/DC converters

2018 ◽  
Vol 11 (12) ◽  
pp. 1937-1945
Author(s):  
Jiang You ◽  
Mahinda Vilathgamuwa ◽  
Negareh Ghasemi
Keyword(s):  
Controller Design ◽  
Current Sharing ◽  
Loop Shaping

scholarly journals Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid

2019 ◽  
Vol 34 (8) ◽  
pp. 8045-8061 ◽  
Author(s):  
Renke Han ◽  
Haojie Wang ◽  
Zheming Jin ◽  
Lexuan Meng ◽  
Josep M. Guerrero
Keyword(s):  
Controller Design ◽  
Voltage Regulation ◽  
Dc Microgrid ◽  
Current Sharing

scholarly journals Single loop PID controller design based on optimization algorithms for parallelly connected dc-dc converters

2021 ◽  
Vol 2128 (1) ◽  
pp. 012027
Author(s):  
Allam M. Allam ◽  
A.S. Ibrahim ◽  
Essam Nabil
Keyword(s):  
Pid Controller ◽  
Controller Design ◽  
Objective Function Value ◽  
Optimization Algorithms ◽  
Systems Dynamics ◽  
Single Loop ◽  
Tuning Method ◽  
Current Sharing ◽  
Pid Controller Design ◽  
Steady State Performance

Abstract This paper addresses a viable single loop PID controller on the bases of optimization algorithms for parallelly connected DC-DC converters to improve current sharing, improve the systems dynamics and guarantee good steady-state performance simultaneously. Because of inconvenience and lack of accuracy of Ziegler-Nichols rule in tuning PID controller parameters, an optimized controller design strategy with the purpose of enhancing the system performance is introduced in this paper. The PID is tuned by the traditional Ziegler -Nichols technique along with three other different algorithms: Genetic algorithm, whale algorithm and grey wolf algorithm. A comparison has been established between these algorithms based on the objective function value, execution time, overshoot, settling time and current sharing. The simulation results were collected to authenticate effectiveness of the proposed techniques and to evaluate the advantages of these optimization algorithms over the traditional tuning method.

scholarly journals A Novel Autonomous Current-Sharing Control Strategy for Multiple Paralleled DC–DC Converters in Islanded DC Microgrid

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3951 ◽  
Author(s):  
Zhang ◽  
Zhuang ◽  
Liu ◽  
Wang ◽  
Guo
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Control Method ◽  
Controller Design ◽  
Voltage Drop ◽  
Low Frequency ◽  
System Stability ◽  
Current Sharing ◽  
Current Sharing Control ◽  
Droop Characteristic

Due to the existence of line impedances and low-bandwidth communication, the traditional peer-to-peer control method based on droop control has difficult meeting the requirements of current sharing and voltage stability in islanded DC microgrids at the same time. In this paper, a novel current-sharing control strategy based on injected small ac voltage with low frequency and low amplitude is proposed for multiple paralleled DC–DC converters. The small ac voltage is superimposed onto the output voltage of each converter. Then, the reactive circulating power is generated and used to regulate the output DC voltage of each converter. Under the droop characteristic between the injected frequency and output DC current, a feedback mechanism is generated to realize the accurate current sharing. On this basis, a reactive power-voltage limiter link and virtual negative impedance are added. Under the interaction of the two links, the bus voltage drop caused by line impedances can be almost completely eliminated. This method does not need any communication or to change the hardware structure. The controller design process is presented in detail along with a system stability analysis. Finally, the feasibility and effectiveness of the proposed control strategy are validated by the results obtained from simulations and experiments.

Continuous Time Controller Design

IEE Review ◽  
1991 ◽  
Vol 37 (6) ◽  
pp. 228
Author(s):  
Stephen Barnett
Keyword(s):  
Continuous Time ◽  
Controller Design

Path Tracking Controller Design of Automatic Guided Vehicle Based on Four-Wheeled Omnidirectional Motion Model

2020 ◽  
Vol 17 (2) ◽  
pp. 7996-8010
Author(s):  
X. Wu ◽  
Y. Yang
Keyword(s):  
Control System ◽  
Fuzzy Controller ◽  
Controller Design ◽  
Threshold Value ◽  
Position Angle ◽  
Path Tracking ◽  
Global Coordinate System ◽  
Automatic Guided Vehicle ◽  
Input Variables ◽  
Industrial Pc

This paper presents a new design of omnidirectional automatic guided vehicle based on a hub motor, and proposes a joint controller for path tracking. The proposed controller includes two parts: a fuzzy controller and a multi-step predictive optimal controller. Firstly, based on various steering conditions, the kinematics model of the whole vehicle and the pose (position, angle) model in the global coordinate system are introduced. Secondly, based on the modeling, the joint controller is designed. Lateral deviation and course deviation are used as the input variables of the control system, and the threshold value is switched according to the value of the input variable to realise the correction of the large range of posture deviation. Finally, the joint controller is implemented by using the industrial PC and the self-developed control system based on the Freescale minimum system. Path tracking experiments were made under the straight and circular paths to test the ability of the joint controller for reducing the pose deviation. The experimental results show that the designed guided vehicle has excellent ability to path tracking, which meets the design goals.

Sign in / Sign up

Export Citation Format

Share Document