发明名称 |
SPANNUNGSABFALL UND ÜBERSPANNUNGKOMPENSATIONSVORRICHTUNG MIT PULSWEITENMODULIERTEM TRANSFORMATOR |
摘要 |
<p>A voltage sag and over-voltage compensation device for an AC electric power distribution system employing cascaded switching devices and a pulse width modulated autotransformer. The autotransformer typically includes lower, center, and upper poles or taps with cascaded switching devices for selectively connecting the voltage source (i.e., a phase of the distribution line) between the lower pole and the center or upper poles. Each stage of the cascaded switching device includes a switching element located within a full-bridge rectifier circuit to allow bi-directional switching through each switching element (i.e., switching through the same switching element during the positive and negative portions of the AC voltage cycle). Each full-bridge rectifier also includes a snubber circuit connected in parallel with a corresponding switching element to absorb the current discharge caused by switching the input power supply to the autotransformer through the corresponding switching device under non-zero current conditions. On the output side, the voltage sag and over-voltage compensation device includes a load capacitor to smooth the voltage-corrected AC power supply toward a sinusoidal power supply at the system frequency, and a notch filter to remove noise created by the switching elements.</p> |
申请公布号 |
AT322098(T) |
申请公布日期 |
2006.04.15 |
申请号 |
AT20020797290T |
申请日期 |
2002.12.12 |
申请人 |
SSI POWER LLC;GEORGIA TECH RESEARCH CORPORATION |
发明人 |
LEE, DONG-MYUNG;ROSTRON, JOSEPH, R. |
分类号 |
H02M5/293;(IPC1-7):H02M5/293 |
主分类号 |
H02M5/293 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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