Informatics Publishing Limited

J. Pradeep Kumar Rao ¹, H. N. Nagamani ², V. Vaidhyanathan ³, T. Bhavani Shanker ⁴

Affiliations
1 Senior Research Fellow, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
2 Ex-Addl Director, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
3 Engineering Officier – III, Capacitors Divison, Central Power Research Institute, Bangalore – 560080, IN
4 Joint Director and HOD, Capacitors Division, Central Power Research Institute, Bangalore – 560080, IN

Abstract

The paper focuses on accepting Hybrid ultra-capacitors as working capacitors from a huge number of unconditioned ones. Hybrid ultra-capacitors of 12 V/2500 F range are evaluated for their performances. Healthy and faulty behavior of these capacitors is analyzed in terms of voltage discharge characteristics. Synthesis of lead carbon hybrid ultra-capacitors of 12 V/2500 F range from electrode to container form is discussed. The steps need to be followed to identify the healthy capacitors from the faulty capacitors are presented. Procedure developed for pre-conditioning of HUCs, performance evaluation and failure analysis results are discussed. From discussion, the condition for acceptance of 12 V/2500 F range Hybrid ultra-capacitor as an energy storage system for solar power applications is formulated.

Keywords

Pb – C HUC/HUC – lead carbon hybrid ultra-capacitor, constant voltage charging time duration.

Full Text

     

J. Pradeep Kumar Rao ¹, H. N. Nagamani ², V. Vaidhyanathan ³, T. Bhavani Shanker ⁴

Affiliations
1 Senior Research Fellow, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
2 Ex-Addl Director, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
3 Engineering Officer – III, Capacitors Division, Central Power Research Institute, Bangalore – 560080, IN
4 Joint Director and HOD, Capacitors Division, Central Power Research Institute, Bangalore – 560080, IN

Abstract

The paper discussess ome of the practical issues on direct parallel integration of lead acid battery and lead carbon hybrid ultra-capacitor to form an integrated energy storage system for solar power applications. The integrated energy storage system is subjected to various C rates to analyze the behavior of charging and discharging of HUC. The percentage contribution of HUC, in charging and discharging of the integrated energy storage system would be a useful information, while coupling battery and HUC in solar power applications. In view of this, experimental studies have been carried out at different C rates and results are presented.

Keywords

Pb - C HUC/HUC - Lead carbon Hybrid Ultra-capacitor, C rates, an integrated energy storage system

Full Text

     

J. Pradeep Kumar Rao ¹, H. N. Nagamani ²

Affiliations
1 Senior Research Fellow, Capacitors Division, CPRI, Bangalore- 560080, IN
2 Addl. Director, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN

Abstract

Hybrid ultra-capacitors are the integration of super capacitor and battery technologies. For performance improvement of a hybrid capacitor based system, accurate modeling is one of the requirements. Hybrid ultra-capacitor or Hybrid Capacitor (HUC) is modeled and then simulated from fundamental circuit of super capacitor with focus on leakage resistance parameter variation. Super Capacitor (SC) - MAXWELL^TM 100F is simulated in its 5^th order and simplified to 2nd order maintaining charge sustenance. All the simulations are performed for the first time in PSPICE/ORCAD^TM. The paper focuses on charging/ discharging capability of the model in time domain, such that the properties of high energy density, high power density and cycle life of the hybrid capacitors retain.

Keywords

Supercapcitor, hybrid ultra-capacitor, modeling, simulation, PSPICE/ORCADTM.

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