On-line correction of errors introduced by instrument transformers in transmission-level steady-state waveform measurements

2000 ◽  
Vol 15 (4) ◽  
pp. 1116-1120 ◽  
Author(s):  
T.K. Hamrita ◽  
B.S. Heck ◽  
A.P.S. Meliopoulos
Keyword(s):  
Steady State ◽  
Instrument Transformers ◽  
On Line ◽  
Transmission Level

Validation of On-line Respiration Meter and its Applications by Computer Simulation

1992 ◽  
Vol 26 (5-6) ◽  
pp. 1355-1363 ◽  
Author(s):  
C-W. Kim ◽  
H. Spanjers ◽  
A. Klapwijk
Keyword(s):  
Steady State ◽  
Activated Sludge ◽  
Respiration Rate ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Mass Balances ◽  
Short Term ◽  
Respiration Rates ◽  
On Line ◽  
Made In

An on-line respiration meter is presented to monitor three types of respiration rates of activated sludge and to calculate effluent and influent short term biochemical oxygen demand (BODst) in the continuous activated sludge process. This work is to verify if the calculated BODst is reliable and the assumptions made in the course of developing the proposed procedure were acceptable. A mathematical model and a dynamic simulation program are written for an activated sludge model plant along with the respiration meter based on mass balances of BODst and DO. The simulation results show that the three types of respiration rate reach steady state within 15 minutes under reasonable operating conditions. As long as the respiration rate reaches steady state the proposed procedure calculates the respiration rate that is equal to the simulated. Under constant and dynamic BODst loading, the proposed procedure is capable of calculating the effluent and influent BODst with reasonable accuracy.

Selection of one-dimensional sedimentation: models for on-line use

1995 ◽  
Vol 31 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Koen Grijspeerdt ◽  
Peter Vanrolleghem ◽  
Willy Verstraete
Keyword(s):  
Steady State ◽  
Selection Criteria ◽  
Data Sets ◽  
Concentration Profiles ◽  
A Posteriori ◽  
One Dimensional ◽  
On Line ◽  
Dynamic Concentration ◽  
Selection Of ◽  
Modelling Task

A comparative study of several recently proposed one-dimensional sedimentation models has been made. This has been achieved by fitting these models to steady-state and dynamic concentration profiles obtained in a down-scaled secondary decanter. The models were evaluated with several a posteriori model selection criteria. Since the purpose of the modelling task is to do on-line simulations, the calculation time was used as one of the selection criteria. Finally, the practical identifiability of the models for the available data sets was also investigated. It could be concluded that the model of Takács et al. (1991) gave the most reliable results.

Scaled steady state models for effective on-line applications

2008 ◽  
Vol 32 (4-5) ◽  
pp. 990-999 ◽  
Author(s):  
Tore Lid ◽  
Sigurd Skogestad
Keyword(s):  
Steady State ◽  
On Line ◽  
State Models

An efficient method for on-line identification of steady state

1995 ◽  
Vol 5 (6) ◽  
pp. 363-374 ◽  
Author(s):  
Songling Cao ◽  
R.Russell Rhinehart
Keyword(s):  
Steady State ◽  
Efficient Method ◽  
Line Identification ◽  
On Line

On-Line Steady State Security Assessment of Power Systems by SMES

2005 ◽  
Vol 15 (2) ◽  
pp. 1923-1926 ◽  
Author(s):  
Y. Min ◽  
Z. Lin ◽  
J. Qiao ◽  
X. Jiang
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Security Assessment ◽  
State Security ◽  
On Line
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