A Dual-Loop-Based Parallel Power Supply System

2013 ◽  
Vol 655-657 ◽  
pp. 1609-1613
Author(s):  
Yu Hao Zhang
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Control Method ◽  
Supply System ◽  
Digital Calibration ◽  
Numerical Control ◽  
Output Current ◽  
Loop Control ◽  
High Efficient

The dual-loop control method, in which inner-loop is the current and outer-loop is the voltage, is proposed to design a high-efficient precise numerical control parallel power supply system, it operates at input voltage of 24V, output voltage of 6-12V and output current of 0-4A. The current ratio of the parallel circuits can be set arbitrarily. Precise adjustment of output current and improvement of efficiency are realized by width modulation and synchronous buck-topology switching power supply, the output current error is smaller than 20mA and DC-DC conversion efficiency is up to 90%; to make output voltage error smaller than 30 mV and the current-sharing error smaller than 0.5%, digital calibration technology and PID control algorithm are used. In addition, this system is equipped with the function of overload protection, double-source redundant heat standby and turn-off, etc.

scholarly journals An Efficient Hybrid AC Metro Power Supply System Integrating PV With Grid

2019 ◽  
pp. 314-321
Author(s):  
J. Prince Joshua Gladson ◽  
A. Ravielango
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Control Method ◽  
Electrical Energy ◽  
Supply System ◽  
Urban Rail Transit ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Photovoltaic Plants

Metro is integral to the urban rail transit with the expansion of the city. Due to the tremendous power consuming of the traction load which is generally considered to be megawatt class, the attendant problems concerning energy-saving and emission-reduction cannot be neglected. An approach wherein the photovoltaic plants are connected into the metro traction power supply system to provide electrical energy is proposed in this paper. Given the deterioration of power quality brought about by PV connection, the photovoltaic inverter adopts output reactive power control method.

Study on Small PV Intelligent Power Supply System

2014 ◽  
Vol 609-610 ◽  
pp. 1408-1411
Author(s):  
Zhong Xian Wang ◽  
Yong Geng Wei ◽  
Yong Li Bi
Keyword(s):  
Control System ◽  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Supply System ◽  
Solar Panel ◽  
Battery Power ◽  
Uninterrupted Power Supply ◽  
Supply Problem ◽  
Low Pressures

In the paper, the PV power supply control system is proposed to realize the uninterrupted power supply, including DC and AC supply. By the method of combining software with hardware, through the solar panel to the configured two pieces of battery could realize the function of fast and slow charging, and the supply battery is changed by testing the battery power to the load uninterrupted power supply. Moreover, when the output voltage of the solar panel is lower than the battery, the output voltage of solar panel is boosted by DC/DC circuit to make the solar panel at low pressures also to charge the battery, effectively solving the difficult solar energy in the weak power supply problem.

Power balanced control of rectifier permanent magnet generator sets

2020 ◽  
pp. 1-11
Author(s):  
Gongfei He ◽  
Bingyi Zhang ◽  
Guihong Feng
Keyword(s):  
Permanent Magnet ◽  
Power Supply ◽  
Power Supply System ◽  
Operation Mode ◽  
High Energy ◽  
Supply System ◽  
High Energy Density ◽  
Parallel Operation ◽  
Loop Control ◽  
Generator Sets

With the wide application of electric drive equipment and variable frequency load, the power supply system based on the DC grid has attracted much attention because of its high energy density and simple control, and the operation mode of rectifier AC synchronous generators operating in parallel is often adopted. The available topology structures of the rectifier permanent magnet (PM) generator sets are analyzed in this paper, the parallel operation principle of uncontrolled rectifier PM generator sets is analyzed in theory. The parallel operation characteristics of the generator sets are summarized when the voltage-stabilizing and power balanced measures are not taken, and the influence factors of power balancing among parallel operation generators are analyzed. The power-balanced method of rectifier generator sets operating in parallel based on a master-slave control strategy is proposed, which can realize power balanced with the closed-loop control of the DC side output current. The simulation and experiment results show that the proposed method can realize the power balanced control of rectifier generator sets operating in parallel well. The output power of each generator set can be distributed according to capacity. The rationalization proposal of how to matching generators’ parameters in the power supply system of rectifier PM generator sets operating in parallel is given.

Control Method Research of Parallel Operation of Power System with Multiple Sources

2014 ◽  
Vol 945-949 ◽  
pp. 1583-1586
Author(s):  
Jia Ling Yu ◽  
Long Han Cao ◽  
Hao Mu ◽  
Jing Nan Li
Keyword(s):  
Fuzzy Control ◽  
Power Supply ◽  
Output Voltage ◽  
Control Method ◽  
Supply Voltage ◽  
Energy Utilization ◽  
Output Current ◽  
Multiple Sources ◽  
Power Sources ◽  
Multiple Power

The parallel connection of multiple power supplies generates output current only depended on the highest power voltage because of the unmatched precision of output voltage and imbalance output power. On account of lacking an appropriate way to solve that current problem presently, this paper presents a multiple power sources control method based on fuzzy control. According to the output voltage error and its change rate of each power source, this method modulates PWM by fuzzy control to keep each voltage conversion circuit share the same output voltage. So the output current of power multiple sources is equal to the sum of multiple power current, make the available power supply at the same time, solve the countercurrent and output current offered by the supreme power supply voltage, increase the energy utilization.

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