Environmental Engineering Reference
In-Depth Information
30
50
v
o
i
20
40
10
30
0
20
−10
10
−20
0
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.9
0.91
0.92
0.93
0.94
0.95
0.96
Time [s]
Time [s]
(a) C-inverter with
C
o
= 479
μ
F
30
50
v
o
i
20
40
10
30
0
20
−10
10
−20
0
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.9
0.91
0.92
0.93
0.94
0.95
0.96
Time [s]
Time [s]
(b) C-inverter with
C
o
= 325
μ
F
30
50
v
o
i
20
40
10
30
0
20
−10
10
−20
0
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.9
0.91
0.92
0.93
0.94
0.95
0.96
Time [s]
Time [s]
(c) R-inverter with
K
i
=4
30
50
v
o
i
20
40
10
30
0
20
−10
10
−20
0
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.9
0.91
0.92
0.93
0.94
0.95
0.96
Time [s]
Time [s]
(d) L-inverter
Figure 7.7
Simulation results for the case with
L
=
2
.
35 mH: output voltage and current (left column)
and THD of the output voltage (right column)
7.6 Experimental Results for R-, L- and C-inverters
Experiments were also carried out on a test rig, of which the parameters are the same as those
in the simulations, to further demonstrate the analysis. The load, which is highly non-linear,
remained the same as well. Two cases were tested: one with
L
=
2
.
35 mH and the other with
L
=
0
.
25 mH.
Table 7.2
Steady-state performance of the inverter with
L
=
0
.
25 mH
C
o
=
μ
+
C
o
=
μ
Type of
Z
o
L
R
3100
F (3rd
5th)
4500
F (3rd)
THD of
v
o
9.2%
8.2%
7.4%
7.0%
V
o
12.73
10.97
11.36
11.33
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