Development of 0.5 MWe Scale DeSOX-DeNOX ... - Getreideheizung

load by the pulse repetition rate. Fig. 5 shows the current and voltage waveforms versus
time for 35 Ω. The pulse voltage has 70.32 kV pk , 280 ns rise time, and 640 ns duration.
The current signal has 1.51 kA pk , 220 ns, and 630 ns.
The impedance of discharge was computed with waveforms acquired by the
oscilloscope as a function of time. All through the experiments, it is found that there is a
constant impedance region and the value of impedance at the
Energy / Pulse (J)
60
50
40
30
20
10
0
0 50 100 150 200
Resistance (Ω)
Voltage (kV)
80
70
60
50
40
30
20
1.6
1.4
1.2
1
0.8
0.6
0.4
10
0.2
0
0
-10
-0.2
0 1 2 3 4 5
Time (µs)
Current (kA)
Fig 4. The transferred energy into Fig 5. Voltage and current veforms
the dummy loads. On the 35 W dummy load.
Impedance (W)
350
300
250
200
150
100
50
70
60
50
40
30
20
10
Energy efficiency (%)
0
55 60 65 70 75
Voltage (kV)
Fig 6. Impedance of the reactor (◆) and energy transfer efficiency (▲) as a
function of the peak voltage applied.
region implies the minimum resistance of discharge. The minimum resistance is always
roughly equal to the value of peak voltage divided by the peak current.
Fig. 6 shows a method to reduce impedance value of the reactor and to increase nergy
efficiency. With increasing the peak voltage applied, impedance of the reactor decreases
and energy efficiency also increases.
0