Modeling of prebreakdown VI characteristics of a wire-plateelectrostatic precipitator operating under combined dc-pulseenergization |
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Authors: | Rajanikanth B.S. Prabhakar B.R. |
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Affiliation: | Dept. of High Voltage Eng., Indian Inst. of Sci., Bangalore; |
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Abstract: | With the advent of pulse energization in electrostatic precipitators, the need for developing a model to simulate the physical processes in the prebreakdown region, at which the precipitator normally operates, is also increasing. The development of such a model helps in predicting the VI characteristics of a precipitator, which will be important to diagnose the electrical problems associated with the precipitator during its operation. The paper reports the details of a proposed model to predict the VI characteristics of a wire-plate precipitator operating under the influeuce of repetitive pulses superposed on a dc bias. The model begins with the calculation of space charge density near the HV electrode during the pulse-on period and then proceeds with the drift of space charges in the pulse-off period aided by the dc bias. The pulse duration was ~250 ns. The pulse repetition rate was 50 Hz. The predicted results were validated against the experimental results conducted on a laboratory model of a wire-plate precipitator. The studies were conducted for dust free conditions |
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