A LRT Control Method Using Sensor Information in Distribution Systems with a Large Amount of PVs and EVs

2016 ◽  
Vol 198 (4) ◽  
pp. 51-62
Author(s):  
YOTARO NOSE ◽  
TAKAO TSUJI ◽  
TSUTOMU OYAMA ◽  
TAKAHARU ITO ◽  
KATSUYA ABE ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Control Method ◽  
Sensor Information

A LRT Control Method using Sensor Information in Distribution Systems with a Large Amount of PVs and EVs

2016 ◽  
Vol 136 (4) ◽  
pp. 390-399 ◽  
Author(s):  
Yotaro Nose ◽  
Takao Tsuji ◽  
Tsutomu Oyama ◽  
Takaharu Ito ◽  
Katsuya Abe ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Control Method ◽  
Sensor Information

A Target Voltage Control Method for Distribution Systems based on Nodal P&Q Prices for PV Distributed Generators

2020 ◽  
Vol 140 (6) ◽  
pp. 456-464
Author(s):  
Naoto Yorino ◽  
Tsubasa Watakabe ◽  
Ahmed Bedawy Khalifa ◽  
Yutaka Sasaki ◽  
Yoshifumi Zoka
Keyword(s):  
Distribution Systems ◽  
Control Method ◽  
Voltage Control ◽  
Distributed Generators

scholarly journals Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 404
Author(s):  
Sara J. Ríos ◽  
Daniel J. Pagano ◽  
Kevin E. Lucas
Keyword(s):  
Power Management ◽  
Distribution Systems ◽  
Control Method ◽  
Dynamic Performance ◽  
Management Control ◽  
Photovoltaic System ◽  
Dc Microgrid ◽  
Dual Active Bridge ◽  
Control Scheme ◽  
Bidirectional Power Flow

Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

scholarly journals Modelling and Current-Mode Control of a Modular Multilevel DC-DC Converter

2021 ◽  
Author(s):  
Sandeep Kaler
Keyword(s):  
Mathematical Model ◽  
Urban Areas ◽  
Power Flow ◽  
Distribution Systems ◽  
Control Method ◽  
Fault Tolerant ◽  
Current Mode ◽  
Current Control ◽  
Energy Storage Devices ◽  
State Equations

The visions of multi-terminal direct-current (MTDC) grids, DC distribution systems for densely populated urban areas, and DC microgrids for more straightforward integration of distributed energy resources (including renewable energies, electric vehicles, and energy storage devices) have sparked a great deal of research and development in the recent past. An enabling technology towards the fulfilment of these visions is efficient, highly-controllable, and fault-tolerant AC-DC and DC-DC electronic power converters capable of interfacing networks that operate at different voltage levels. This thesis thus presents the results of an in-depth investigation into the operation and control of a particular class of DC-DC converters. The DC-DC converter studied in this thesis is based upon the so-called modular multi-level converter (MMC) configuration, employing halfbridge submodules and with no galvanic isolation. The thesis first presents the governing dynamic and steady-state equations for the converter. Then, based on the developed mathematical model, it identifies suitable variables, strategies, and feedback loops for the regulation of the submodule DC voltages as well as converter power throughput. In particular, two current-control loops are proposed that, in coordination with one another, not only enable the control of the power flow within the converter, but also promise protection against overloads and terminal shorts. The validity of the mathematical model and effectiveness of the proposed control are verified through off-line simulation of a detailed circuit model as well as experiments conducted on a 1-kW experimental setup. The results of this exercise motivate the extension of the proposed control method to more compact designs with galvanic isolation and enhanced power handing capabilities.

Switching Power Supply Control Strategy Based on Monitoring Configuration

2021 ◽  
Vol 16 (5) ◽  
pp. 766-772
Author(s):  
Le Luo ◽  
Ming-Zhong Yang
Keyword(s):  
Predictive Control ◽  
Output Voltage ◽  
Distribution Systems ◽  
Control Method ◽  
Sliding Mode ◽  
Input Voltage ◽  
Buck Converter ◽  
Switching Power Supply ◽  
Switching Power ◽  
Overshoot And Undershoot

In this paper, a new discrete-time sliding mode predictive control (DSMPC) strategy with a PID sliding function is proposed for synchronous DC-DC Buck converter. The model predictive control, along with digital sliding mode control (DSMC) is able to further reducing the chattering phenomenon, steady-state error, overshoot, and undershoot of the converter output voltage. The proposed control method implementation only requires output error voltage evaluation. The effectiveness of the proposed DSMPC is proved through simulation results executed by the MATLAB/SIMULINK software. These results demonstrate its performance is superior to DSMC. The selected synchronous Buck converter in this paper has 380 V input voltage and 48 V output voltage that can be applied in sections of DC distribution systems.

Process stability for GTAW-based additive manufacturing

2019 ◽  
Vol 25 (5) ◽  
pp. 809-819 ◽  
Author(s):  
Xiaolong Wang ◽  
Aimin Wang ◽  
Kaixiang Wang ◽  
Yuebo Li
Keyword(s):  
Control System ◽  
Information Fusion ◽  
Control Method ◽  
Welding Current ◽  
Arc Length ◽  
Process Stability ◽  
Content Type ◽  
Feed Strategy ◽  
Sensor Information ◽  
Wire Feed

Abstract Purpose Traditional gas tungsten arc welding (GTAW) and GTAW-based wire and arc additive manufacturing (WAAM) are notably different. These differences are crucial to the process stability and surface quality in GTAW WAAM. This paper addresses special characteristics and the process control method of GTAW WAAM. The purpose of this paper is to improve the process stability with sensor information fusion in omnidirectional GTAW WAAM process. Design/methodology/approach A wire feed strategy is proposed to achieve an omnidirectional GTAW WAAM process. Thus, a model of welding voltage with welding current and arc length is established. An automatic control system fit to the entire GTAW WAAM process is established using both welding voltage and welding current. The effect of several types of commonly used controllers is examined. To assess the validity of this system, an arc length step experiment, various wire feed speed experiments and a square sample experiment were performed. Findings The research findings show that the resented wire feed strategy and arc length control system can effectively guarantee the stability of the GTAW WAAM process. Originality/value This paper tries to make a foundation work to achieve omnidirectional welding and process stability of GTAW WAAM through wire feed geometry analysis and sensor information fusion control model. The proposed wire feed strategy is implementable and practical, and a novel sensor fusion control method has been developed in the study for varying current GTAW WAAM process.

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