Analytical Design of an S/SP Compensated IPT System to Minimize Output Voltage Fluctuation Under Predetermined Coupling Coefficient Range

2018 ◽  
Author(s):  
Yousu Yao ◽  
Xiaosheng Liu ◽  
Yijie Wang ◽  
Yan Zhou ◽  
Kaixing Lu ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Output Voltage ◽  
Voltage Fluctuation ◽  
Analytical Design

A Simple Control Method of Output Voltage for Three-Phase Multilevel Inverter Considering the DC Voltage Fluctuation

2008 ◽  
Vol 128 (3) ◽  
pp. 244-250
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Control Method ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Dc Voltage ◽  
Three Phase

scholarly journals Output Voltage Control of MMC-Based Microgrid Based on Voltage Fluctuation Compensation Sliding Mode Control

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Sheng Xue ◽  
Xinggui Wang ◽  
Xiaoying Li
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Output Voltage ◽  
Sliding Mode ◽  
Sliding Mode Controller ◽  
Voltage Fluctuation ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
System Output ◽  
Dc Component

As a novel topology of microgrid, the output voltage control of MMC half bridge series microgrid (MMC-MG) is rarely studied. In this paper, on the basis of fully analyzing the mechanism of output voltage fluctuation of MMC-MG under the condition of islanded mode, a control strategy of a hybrid energy storage system is proposed to reduce the generating module (GM) DC-link voltage fluctuation caused by the randomness of renewable energy microsource output power. Moreover, in order to further improve the stabilization of the MMC-MG output voltage and meet the requirements of fast voltage recovery and antijamming, a sliding mode controller is designed. Then, a voltage fluctuation compensation controller is designed to suppress the DC component and fundamental frequency deviation of system output voltage caused by GM DC-link voltage fluctuation. The proposed control approach is validated against simulations using MMC-MG models with 4-GM per arm. The results show that the proposed hybrid energy storage control strategy can suppress the GM DC-link voltage fluctuation, the sliding mode controller can stabilize the system output voltage when the load drastic changes, and the fluctuation compensation strategy can suppress the DC component and the fundamental frequency deviation of system output voltage.

A simple method for output voltage control of a three-phase multilevel inverter considering DC voltage fluctuation

2010 ◽  
Vol 170 (3) ◽  
pp. 40-47
Author(s):  
Kenji Amei ◽  
Kenji Teshima ◽  
Youhei Tanizaki ◽  
Takahisa Ohji ◽  
Masaaki Sakui
Keyword(s):  
Output Voltage ◽  
Voltage Control ◽  
Multilevel Inverter ◽  
Voltage Fluctuation ◽  
Simple Method ◽  
Dc Voltage ◽  
Three Phase

Research of Compensated AC Regulated Power Supply in Electric Power Systems Based on a High-Frequency Isolated Transformer

2013 ◽  
Vol 676 ◽  
pp. 227-230
Author(s):  
Qi Liang Zhang ◽  
Ping Wang ◽  
Liu Yang
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Power Supply ◽  
High Frequency ◽  
Output Voltage ◽  
Closed Loop ◽  
Electric Power Systems ◽  
Slow Response ◽  
Voltage Fluctuation ◽  
Simulation Results

In this paper, a new topology of compensated AC regulated power supply (ACRPS) in electric power systems based on a high-frequency isolated transformer (HFIT) is proposed. In order to overcome the slow response and low accuracy of the existing ACRPS, the phase shift regulating control (PSRC) based on instantaneous value of voltage single closed loop is applied as well as the software phase locked loop (SPLL). The proposed ACRPS has been simulated in the case of the voltage fluctuation, harmonics and frequency shift with Matlab. The simulation results show that output voltage precision is controlled within 0.5% and total harmonic distribution (THD) can be limited to less than 1%. In a word, the feasibility of the proposed ACRPS is effectively verified.

scholarly journals Design and analysis of energy harvester using MEMS based Cantilever with variable perforations

2017 ◽  
Vol 7 (1.5) ◽  
pp. 141
Author(s):  
G.R.K Prasad ◽  
N. Siddaiah ◽  
P. Sanjeev ◽  
A. Raviteja ◽  
P. Karunya ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Output Voltage ◽  
Energy Harvester ◽  
Piezoelectric Properties ◽  
Piezoelectric Materials ◽  
Crystal Properties ◽  
Displacement Sensitivity ◽  
Eigen Frequencies ◽  
Output Capacitance ◽  
Pzt Thick Film

This paper represents the design and analysis of energy harvester using MEMS based cantilever with PMN-PT single crystal properties which has excellent piezoelectric properties while compared to other piezoelectric materials like PZT thick film. The design is analysed using COMSOL multi physics which is used for many MEMS operations and also problems related to physics with many mathematical calculations with better efficiency and ease to design. We designed a cantilever with PMN-PT properties which has good coupling coefficient and increased perforations in number in form of square and circular. We tested the displacement sensitivity i.e., the variation of displacement at different eigen frequencies with increase in number of perforations. We observe output voltage by designing electromechanical analysis and variation in output capacitance of  2 .41 x 10-22 Farads is observed.

Maximum efficiency tracking control of underwater wireless power transfer system using artificial neural networks

2020 ◽  
pp. 095965182094651
Author(s):  
Zhongjiu Zheng ◽  
Ning Wang ◽  
Sara Ahmed
Keyword(s):  
Coupling Coefficient ◽  
Output Voltage ◽  
Wireless Power Transfer ◽  
Maximum Efficiency ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Optimal Output ◽  
Wireless Power Transfer System ◽  
Load Conditions

In the underwater wireless power transfer system for the marine vehicle, the system transfer efficiency is influenced by factors including coupling state and load condition. To solve the problem of transfer efficiency decrease caused by the dynamic changes of coupling coefficient and load conditions, a maximum efficiency tracking method based on the dynamic identification of optimal output voltage and coupling coefficient is proposed. Moreover, the approximation characteristic to the nonlinear function of artificial neural networks is used to dynamically adjust the output voltage of DC/DC converter, and the deviation between the output voltage and optimal voltage can be kept within the allowable error range leading to maximum efficiency tracking. The experimental results show that the control method can calculate the optimal output voltage correctly, adjust the output voltage quickly and accurately, and achieve the maximum efficiency of the wireless power transfer system when the coupling coefficient and load conditions change dynamically.

A Circuit for Improving DC-DC Converter Dynamic Response

2013 ◽  
Vol 380-384 ◽  
pp. 3133-3138
Author(s):  
Gui Xi Jia ◽  
He Jiang
Keyword(s):  
Dynamic Response ◽  
Output Voltage ◽  
Output Current ◽  
Voltage Fluctuation ◽  
Compensation Circuit ◽  
Parallel Capacitor ◽  
Wide Range ◽  
Simulation Results

To improve the disadvantage of DC-DC converter output voltage fluctuation when output current changes in wide range, a compensation circuit for improving DC-DC converter dynamic response was presented. The circuit was based on the theory of parallel or anti-parallel capacitor. A charged capacitor was paralleled when output current positive jumped. A charged capacitor was anti-paralleled when output current negative jumped. It worked when output current changed. So DC-DC converter dynamic response was improved and efficiency could be high in the same time. The simulation results proved that the effect of compensation circuit in improving the converter dynamic response and stabilizing the output voltage.

Study of Supercapacitor Energy Storage Converter with Unbalanced and Nonlinear Loads

2014 ◽  
Vol 494-495 ◽  
pp. 1561-1568
Author(s):  
Ning Ning Li ◽  
Xi Sheng Tang ◽  
Guo Wei Zhang
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Output Voltage ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Voltage Fluctuation ◽  
Nonlinear Loads ◽  
Influence Mechanism ◽  
Zero Sequence ◽  
Supercapacitor Energy Storage

A novel topology structure of supercapacitor energy storage converter (ESC) is presented with two cascaded bidirectional DC/DC converters connected to a bidirectional DC/AC converter. It can promote the energy utilization rate of supercapacitor and improve the ability of powering unbalanced and nonlinear loads. The effect of the midpoint voltage fluctuation of the cascaded connected DC bus capacitors on output voltage is analyzed, followed by the influence mechanism unbalanced and nonlinear loads. The control strategy to restrain the unbalance and zero sequence harmonic is proposed. The theoretical analysis and the proposed method are verified through simulations and experiments on a 100kVA supercapacitor ESC prototype.

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