Pulse-amplitude-synthesis-and-control (PASC) power converter for power system connection of a diagonally connected MHD generator

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:273321

Johnson, R ^[1]; Donnelly, M ^[1]

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1. Montana State Univ., Bozeman, MT (United States)

In this paper, the problem of power waveform synthesis using the PASC technique to produce a desired output from a MHD single dc source generator is presented. In the case of a practical MHD diagonal generator In which actual end consolidation from multiple electrode pairs is usually accomplished by introduction of a dissipative resistive network grid, a small modification to the idealized two terminal PASC power electronic network presented here will accomplish the same function, but with much less dissipation. The PASC process utilizes a switching array to connect/disconnect one or more dc sources in an overlapped fashion under computer actuation, along with error output signal feedback, to generate the control necessary to match the desired waveform as specified in the computer. The principal benefit of this system for the single output source diagonal MHD generator is that quantized sinusoids can be generated having low harmonic content and dynamic power factor control without the need for large and expensive filtering and VAR compensation such as is required for conventional inverters. Further MHD advantages include the increase in control flexibility to provide rapid generator load management, isolation, and harmonic control versus output level.

• OSTI ID: 273321
• Report Number(s): CONF-930626--
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
COMPUTERIZED CONTROL SYSTEMS
MHD GENERATORS
PULSE TECHNIQUES
SYNTHESIS
WAVE FORMS