Solid State Archives - Engineering Articles

DIFFERENCE BETWEEN SOLID STATE AND OFFLINE UPS SYSTEM

Leave a Comment / Inverter, Power Electronics, Solid State, UPS / Engr. Aneel Kumar

Solid-state Controls systems differ from off-line designs in the following ways: 1. Solid-state Controls offers an on-line, double conversion UPS system. Therefore, the client’s critical load is being powered continuously from the inverter. The battery is always being floated by the fully-rated rectifier/charger and is always connected to the inverter input. As result, all components […]

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PROBLEMS WITH OFFLINE UPS SYSTEM

Leave a Comment / Inverter, Power Electronics, Solid State, UPS / Engr. Aneel Kumar

The following is an outline of some of the major problems associated with off-line (stand by) UPS designs. INPUT FREQUENCY/ VOLTAGE PASS THROUGH The off-line unit is designed to pass through the input line voltage and frequency to the load. (Note: the power passed through is non-conditioned utility power.) While this may be fine for

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ADVANTAGES AND DISADVANTAGES OF PHOTOVOLTAICS

Leave a Comment / Photovolatics, Renewable Energy, Solid State / Engr. Aneel Kumar

ADVANTAGES OF PHOTOVOLTAICS: Fuel source is vast and essentially infinite No emissions, no combustion or radioactive fuel for disposal (does not contribute perceptibly to global climate change or pollution) Low operating costs (no fuel) No moving parts (no wear) Ambient temperature operation (no high temperature corrosion or safety issues) High reliability in modules (>20 years)

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CLASSIFICATION OF HVDC LINKS

1 Comment / Direct Current, High Voltage Generation, HVDC, Solid State, Transmission System / Engr. Aneel Kumar

HVDC links may be broadly classified into the following categories: Monopolar Links Bipolar Links Homopolar Links The basic configuration of a monopolar link is shown in figure. It uses one conductor, usually of negative polarity. The return path is provided by ground or water. Cost considerations often lead to the use of such systems, particularly

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COMPONENTS OF HIGH VOLTAGE DC TRANSMISSION SYSTEM

Leave a Comment / HVDC, Power Electronics, Solid State, Transmission System / Engr. Aneel Kumar

Figure: A schematic of a bipolar HVDC system identifying main components

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APPLICATIONS OF HIGH VOLTAGE DC TRANSMISSION

Leave a Comment / HVDC, Power Electronics, Solid State, Transmission System / Engr. Aneel Kumar

1) CONNECTING REMOTE GENERATION Some energy sources, such as hydro and solar power, are often located hundreds or thousands kilometers away from the load centers. HVDC will reliably deliver electricity generated from mountain tops, deserts and seas across vast distances with low losses. 2) INTERCONNECTING GRIDS Connecting AC grids is done for stabilization purposes and

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