The Design of On-Board Supercapacitor Energy Storage System of Electric-Car

Electric energy is the most convenient and clean energy sources, and it is used far and wide. While there are many problems of power quality which imperil greatly electronic loads. Modern times, high quality power supply is required by modern manufacturers, and a quick and efficient energy storage technology is now starved for in order to improve and solve the transitory power quality.As a new kind of energy storage component, super capacitors have fast response, high charge-discharge efficiency. This paper focuses on the application background that the super capacitor DC energy storage unit can improve the quality of electric energy, establish a mathematical model of the storage unit, analysis and design the control scheme of super capacitor DC storage energy system, to achieve rapid compensation of the instantaneous power of the system, effectively improving the power quality and stability of the system.

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Super-capacitor energy storage system to recuperate regenerative braking energy in elevator operation of high buildings

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v12i2.pp1358-1367 ◽

2022 ◽

Vol 12 (2) ◽

pp. 1358

Author(s):

An Thi Hoai Thu Anh ◽

Luong Huynh Duc

Keyword(s):

Energy Storage ◽

Storage System ◽

Electric Energy ◽

Energy Storage System ◽

Regenerative Braking ◽

Current Loop ◽

Discharge Process ◽

Loop Current ◽

Super Capacitor ◽

Electric Energy Consumption

<span>In operating phases of elevators, accelerating, braking modes occur frequently, so braking energy recuperation of elevators has contributed considerably to decrease the total electric energy consumption for operating elevators in multi-floor buildings. In this paper, the supercapacitor energy storage system is used to recover regenerative braking energy of elevators when they operate down full-load and up no-load, reducing fluctuation of voltage on DC bus as well. Therefore, super-capacitor energy storage system (SCESS) will be parallel with line utility to recuperate regenerative braking energy in braking phase and support energy for acceleration phase. The surplus energy will be stored in the supercapacitors thanks to a DC-DC converter capable of exchanging energy bidirectionally in buck/boost modes, and designing control strategy including two control loops. Inner loop-current loop: controlling charge/discharge process of supercapacitors by current iL complying with operation characteristic of elevator; Outer loop-voltage loop: managing UDC-link at a fixed value. Simulation results with elevator system of the ten-floor building, Hanoi, Vietnam installed SCESS have been verified on MATLAB Simulink, SimPowerSystem with saving energy level about 30%.</span>

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Primary chemical current sources in power supply systems of reentry vehicles

Space engineering and technology ◽

10.33950/spacetech-2308-7625-2020-1-34-41 ◽

2020 ◽

pp. 34-41

Author(s):

German V. NOSKIN ◽

Evgeny I KHARAGEZOV ◽

Egor S. KHAVANOV ◽

Roman A. BESCHASTNIY

Keyword(s):

Energy Storage ◽

Power Supply ◽

Power Supply System ◽

Storage System ◽

Energy Storage System ◽

Supply System ◽

Storage Unit ◽

Super Capacitor ◽

Reentry Vehicle ◽

Energy Storage Unit

The paper discusses key operational features of the power supply system in reentry vehicles, including those of manned spacecraft. It identifies the reentry vehicle modes, which drive the requirements for the power supply system parameters. It provides an analysis of primary chemical current sources as compared with some secondary ones, taking into account their use in the power supply system of a manned re-entry vehicle. Reviewed in the process of selecting the energy storage unit was an octagonal list of key characteristics with visual geometric representation of the integral characteristic. Conditions were adopted for assigning weight factors and the integral indicator for selection of the storage unit. Good reasons for selecting the energy storage system based LiSOCl2 were demonstrated. Taking into account the requirements of high availability and safety of the system, an advanced hybrid power supply system is proposed which uses super-capacitor units. Key words: power supply system, reentry vehicle, primary chemical current source, energy storage unit, super-capacitor, weight factor, hybrid energy storage system.

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