Article

Stationary state error reduction on the electrical modelling of high pressure sodium lamps

Electron. Dept., Univ. Autonoma Metropolitana (UAM), Mexico City, Mexico
IET Electric Power Applications (impact factor: 1.17). 05/2011; DOI:10.1049/iet-epa.2010.0194 pp.350 - 358
Source: IEEE Xplore

ABSTRACT This study presents an improvement in the steady-state error reduction in the electrical modelling of high pressure sodium (HPS) lamps when they exhibit high non-linear behaviour. An electrical expression of the lamp is resistance could be obtained from the Saha equation, which is sufficient to represent the behaviour of several high intensity discharge lamps with low non-linear behaviour, but if the modelled lamp possess high non-linear operation, as do some HPS lamps, a large stationary error between the simulation and experimental results is obtained. Therefore an enhanced expression of lamp resistance is proposed here to reduce this error. Parameters are obtained from the measurements of electrical variables such as power, current and voltage, in the lamp. The proposal can be used to simulate the non-resonant ballast. Experimental and simulation results are shown.

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Keywords

electrical expression
 
electrical variables
 
enhanced expression
 
experimental results
 
HPS lamps
 
intensity discharge lamps
 
lamp resistance
 
large stationary error
 
low non-linear behaviour
 
modelled lamp
 
non-linear operation
 
Saha equation
 
simulation
 
simulation results
 
steady-state error reduction
 
study presents
 

R. Osorio