Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1999-04-22
2000-06-13
Berhane, Adolf Deneke
Electricity: power supply or regulation systems
For reactive power control
Using converter
363 40, G05F 170
Patent
active
060753501
ABSTRACT:
A power line conditioner using cascade multilevel inverter used for voltage regulation, reactive power (var) compensation and harmonic filtering, including the control schemes for operating the cascade inverter for voltage regulation and harmonic filtering in distribution systems. The cascade M-level inverter consists of (M-1)/2 H-bridges in which each bridge has its own separate DC source. This new inverter (1) can generate almost sinusoidal waveform voltage with only one time switching per line cycle, (2) can eliminate transformers of multipulse inverters used in the conventional static VAR compensators, and (3) makes possible direct connection to the 13.8 kV power distribution system in parallel and series without any transformer. In other words, the power line conditioner is much more efficient and more suitable to VAR compensation and harmonic filtering of distribution systems than traditional multipulse and pulse width modulation (PWM) inverters. It has been shown that the new inverter is specially suited for simultaneous VAR compensation and harmonic filtering.
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Berhane Adolf Deneke
Lockheed Martin Energy Research Corporation
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