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Nagamani, H. N.
- A study on preliminary screening of 12 V/ 2500 F range lead carbon hybrid ultracapacitors as energy storage device for solar power applications
Abstract Views :197 |
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Authors
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
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
Source
Power Research, Vol 13, No 3 (2017), Pagination: 503-510Abstract
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.
- Charge-discharge behaviour of lead acid battery and lead carbon hybrid ultracapacitors as anintegrated system for solar power applications
Abstract Views :196 |
PDF Views:0
Authors
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
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
Source
Power Research, Vol 13, No 3 (2017), Pagination: 517-524Abstract
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- Modeling of Hybrid Ultra-capacitors for Power Electronic Applications Using PSPICE/ORCAD™
Abstract Views :179 |
PDF Views:0
Authors
Affiliations
1 Senior Research Fellow, Capacitors Division, CPRI, Bangalore- 560080, IN
2 Addl. Director, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
1 Senior Research Fellow, Capacitors Division, CPRI, Bangalore- 560080, IN
2 Addl. Director, Capacitors Division, Central Power Research Institute, Bangalore- 560080, IN
Source
Power Research, Vol 12, No 3 (2016), Pagination: 547-554Abstract
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) - MAXWELLTM 100F is simulated in its 5th order and simplified to 2nd order maintaining charge sustenance. All the simulations are performed for the first time in PSPICE/ORCADTM. 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.- On-Line Diagnosis of Power Transformer Insulation System: Experience of CPRI, India
Abstract Views :173 |
PDF Views:0
Authors
Affiliations
1 Central Power Research Institute, Bangalore - 560080, IN
1 Central Power Research Institute, Bangalore - 560080, IN
Source
Power Research, Vol 8, No 1 (2012), Pagination: 17–24Abstract
Power transformers play a vital role in handling large amount of power from generating stations [through Generating Station Units(GSU] to transmitting stations (through power transformers) and to end user through distribution transformers. Power transformers involve large amount of capital investment and the failure of transformers causes severe fi nancial loss to the utility and inconvenience to the end users. Periodic maintenance and condition monitoring are the key factors for successful operation of power transformers. A number of diagnostic tools are in vogue. Most of these tests are conventionaloff-line techniques and require power shut down and disconnection of transformer from the circuit. Several alternate nonconventional on-line techniques are being adopted and Acoustic Emission (AE) technique is one among them. Central Power Research Institute (CPRI), India, is employing AE technique for on-line diagnosis of power transformers. Nearly 200 transformers have been tested and investigated covering rating up to 315 MVA, 400 kV.The paper discusses some of the important aspects of on-line diagnosis of oil-fi lled power transformers employing AE technique. A few important case studies which have helped utilities and transformer manufacturers for initiating corrective actions are covered in the paper.