scholarly journals A family of high voltage gain quasi‐Δ‐source impedance networks

2020 ◽  
Author(s):  
Hamed Rezazadeh ◽  
Mohammad Monfared ◽  
Ali Nikbahar ◽  
Saeed Sharifi
Keyword(s):  
High Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Source Impedance

Improved Y-Source Single-Stage Transformerless Micro-Inverter for PV Residential Applications

2020 ◽  
Vol 38 (9A) ◽  
pp. 1327-1341
Author(s):  
Firas S. Salih ◽  
Oday A. Ahmed
Keyword(s):  
High Voltage ◽  
Power Plants ◽  
Single Stage ◽  
Small Scale ◽  
Voltage Gain ◽  
Leakage Inductance ◽  
High Voltage Gain ◽  
Source Impedance ◽  
Wide Range ◽  
Micro Inverter

Y-Source Impedance Network (YSN) is one of the most suitable for providing high voltage gain. It generatesa high voltage gain by using a small shoot-through duty cycle, which makes it suitable in applications require a wide range of input voltages such as the Photovoltaic (PV) power plants. However, traditional (YSNs) are unable to boost low voltages in certain applications to the DC-link voltage (about 400V) since it requires a high number of the turns ratio. Higher turns ratio implies higher leakage inductance resulting in higher DC-link voltage spikes. Also, traditional YSNs have high voltage stresses across the components. In this paper, a developed new transformerless Micro-Inverter (MI) is presented that can overcome all the aforementioned drawbacks. The proposed MI has been developed and designed to eliminate both the leakage inductance due to three-winding coupled transformer and leakage current due to using transformerless MI configuration. In addition, the proposed MI reduced the components' stress significantly and increases the converter voltage gain capability in one single-stage. The proposed high boost ratio transformerless MI is analyzed through the PLECS software simulator and implemented in a small scale MI prototype to ensure the results agree with the analysis and simulation results.

scholarly journals Symmetrical high voltage gain half-bridge inverter based double-Y-source networks with reduced voltage stress

2020 ◽  
Vol 11 (1) ◽  
pp. 515
Author(s):  
Hussain Sayed ◽  
Oday A Ahmed ◽  
Dhari Y Mahmood ◽  
Kanaan A. Jalal ◽  
Waleed H. Habeeb
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Single Stage ◽  
Voltage Gain ◽  
Saturation State ◽  
Coupled Inductors ◽  
High Voltage Gain ◽  
Source Impedance ◽  
Voltage Stress ◽  
Mathematical Formulas

<span>A single-stage symmetrical high voltage gain half-bridge (HB) DC-AC converter is proposed in this paper. Using two Y-source impedance networks, the following key features are utilized from the proposed topology: single stage inverter with very high voltage gain compared to conventional HB inverter, symmetrical output voltage waveform, low voltage stress across the passive components because it is distributed across two impedance networks, and only two switching devices are needed for the converter. Furthermore, important merit of the proposed topology is that the current drawn by the Y-coupled inductors is symmetrical around the X-axis which helps to prevent the Y-network cores from reaching the saturation state. And the last compelling feature is a virtual neutral point for the load connection is inherited in the proposed double Y-source impedance networks converter with no need for DC-Link capacitors. For low voltage sources such as photovoltaic (PV) and fuel cell, the converter is designed to achieve continuous input current operation. The operation modes and principles of the inverter are analyzed and discussed deeply in this paper. A detailed mathematical equations system is derived and verified for the presented converter. Finally, PSpice simulation tools are used to simulate the converter and verify the derived mathematical formulas.</span>

scholarly journals High voltage gain and conversion using bidirectional converter in microgrid and electric vehicle systems

2021 ◽  
Vol 1964 (5) ◽  
pp. 052016
Author(s):  
L. Annie Isabella ◽  
Y. Alexander Jeevanantham ◽  
Chandla Ellis ◽  
R. Kameshwaran
Keyword(s):  
Electric Vehicle ◽  
High Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Bidirectional Converter ◽  
Vehicle Systems

Experimental validation of nine‐level switched‐capacitor inverter topology with high voltage gain

2021 ◽  
Author(s):  
Jagabar Sathik Mohamed Ali ◽  
Marif Daula Siddique ◽  
Saad Mekhilef ◽  
Yongheng Yang ◽  
Yam Siwakoti ◽  
...  
Keyword(s):  
High Voltage ◽  
Experimental Validation ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Inverter Topology
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