A Study on Electric Power Smoothing System for Lead-acid Battery of Stand-alone Natural Energy Power System Using EDLC

2007 ◽  
Author(s):  
Yan Jia ◽  
Kenji Oti ◽  
Naoki Yamamura ◽  
Muneaki Ishida
Keyword(s):  
Power System ◽  
Electric Power ◽  
Lead Acid Battery ◽  
Power Smoothing ◽  
Natural Energy ◽  
Lead Acid

scholarly journals Opportunity for Improving Lead-Acid Battery Management of Photovoltaic-Genset-Battery Hybrid Power Systems Based on Measured Field Data

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2237 ◽  
Author(s):  
Andrew Swingler ◽  
Jordan Torrealba
Keyword(s):  
Power System ◽  
Winter Season ◽  
Management Approach ◽  
Battery Management ◽  
Lead Acid Battery ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Battery Capacity ◽  
Battery Bank ◽  
Lead Acid

In this communication, the measured behaviour of a lead-acid battery bank within a stand-alone residential solar photovoltaic (PV)-genset-battery hybrid power system in Canada is presented and discussed. In order to capture rare field-based battery performance data, a newly commissioned lead-acid battery bank was equipped with a battery monitoring device capable of logging voltage, current, temperature and amp-hours every 30 s for the life of the battery. The measured data captures a severe loss of battery capacity due to a combination of short-term deep discharge and extended partial state of charge operation—conditions not unusual during winter season PV-genset-battery hybrid power system operation. Subsequent manual override of the system control set points to encourage gradual battery overcharge are shown to recover the lead-acid battery bank’s performance over the following three months. Limitations of the power conversion system’s battery management approach are discussed and a novel closed loop control system for improving lead-acid based PV-genset-battery hybrid system performance is rationalized and proposed for further research.

Design and Simulation of a Hybrid Power System for a Bus Start-Stop Working Condition

2013 ◽  
Vol 448-453 ◽  
pp. 3101-3106
Author(s):  
Qian Wang ◽  
Jian Zhang ◽  
Wei Liu ◽  
Yu Wan Lou ◽  
Xiao Hua Xie ◽  
...  
Keyword(s):  
Power System ◽  
Pulse Discharge ◽  
Lithium Ion ◽  
Cycle Life ◽  
High Rate ◽  
Lead Acid Battery ◽  
Control Cost ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Lead Acid

A promising applied technology on hybrid power system for electric vehicle was proposed in this paper. Considring the actual bus working conditions, a testing system of multi-stage pulse discharge was designed. The separated LiFePO4series, lead-acid battery and the paralleled battery pack, constituted by the lithium battery and lead-acid battery with equal capacity, were tested to compare the voltage and power characteristics, as well as temperature rise. The results indicate that the lithium-ion batteries provide momentary high currant at high rate pulse discharge while keeping the lead-acid stay at a higher state of charge and improving its cycle life. During the intermittent, spontaneous capacity redistribution is achieved in the paralleled system, which helps to relieve the potential polarization and avoid the over-discharge of lithium-ion battery. Systematic analysis of the paralleled system demonstrats that it is benefitial to the circuit control, cost, cycle life and safety.

Research of Setting Main Circuit Parameters of Independent Photovoltaic Power System

2012 ◽  
Vol 260-261 ◽  
pp. 414-419
Author(s):  
Fei Zhang ◽  
Jiao Fu ◽  
Hua Jia ◽  
Jie Li
Keyword(s):  
Power System ◽  
Time Domain ◽  
Photovoltaic Cells ◽  
Lead Acid Battery ◽  
Design Scheme ◽  
Photovoltaic Power ◽  
Lead Acid

Inductance capacitance parameters value of main circuit devices of independent photovoltaic power system influence stability of system. In this paper, selection the suitable transistors, using a variety of algorithms to match the parameters value of capacitance, inductance. PSIM software was used to carry out modeling for photovoltaic cells, lead-acid battery, electrombile. Simulation of buck and boost DC/DC circuits, through analyzing time-domain waveform, verifys feasibility of design scheme, correctness of the algorithms. These algorithms provide a the oretical basis of main circuit setting of independent photovoltaic power system.

scholarly journals Analysis of overcharging characteristics of a new type lithium iron phosphate battery for dc system of substation

2021 ◽  
Vol 248 ◽  
pp. 01066
Author(s):  
Liu Meijie ◽  
Gao Kai ◽  
Li Zhongwei ◽  
Qiu Peng ◽  
Meng Zhen
Keyword(s):  
Power System ◽  
Power Supply ◽  
Lithium Iron Phosphate ◽  
Rapid Development ◽  
Iron Phosphate ◽  
Operating Conditions ◽  
Lead Acid Battery ◽  
Dc Power ◽  
Emergency Power ◽  
Lead Acid

In recent years, the number of DC power system in substation has been increasing. And the technical transformation of DC power system, fault maintenance and other workload is also on the rise, therefore dc emergency power emerged. The lead-acid battery is usually adopted for traditional DC emergency power supply. The disadvantage of lead-acid battery in volume and quality makes it difficult to realize the portability and mobility of dc emergency power. Lithium iron phosphate battery technology is the frontier technology in the rapid development period. However, the characteristics are not studied clearly. This paper studies the characteristics of lithium iron phosphate battery in different ambient temperature, operating conditions, and current of charge and discharge, analyses and summarizes the characteristics of battery charge and discharge, so as to improve the maintenance of station DC power supply system and the reliability of power supply network.

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