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US 8,853,886 B2Granted
System for use of static inverters in variable energy generation environments
AssigneeTigo Energy, Inc.
InventorsMordechay Avrutsky, Dan Kikinis
Life of this patent
Estimating the term…
Abstract
A system to collect energy from generation systems such as, for example, wind farms or solar farms with widely distributed energy-generation equipment. In some cases, static inverters are used to feed the energy directly into the power grid. In some other cases, back-to-back static inverters are used create a high-voltage DC transmission line to collect power from multiple generation sites into one feed-in site.
Claims20
A energy generation system, comprising:
- one or more strings of variable energy collectors;
- one or more string converters managed by a first controller to combine voltage outputs of the one or more strings of variable energy collectors into an energy output stream;
- a bus configured to route the energy output stream;
- a static inverter to which the bus routes the energy output stream, the static inverter comprising:
- switches for converting the electrical energy output to an alternating current;
- and
- a transformer arrangement comprising a transformer and a balancing transformer to convert the alternating current to an alternating current with a given voltage;
- and
- a second controller configured to receive measurements of voltage phase on a grid and control timing of the switches in accordance with the measurements of the voltage phase.
6 more elements
An energy generation system, comprising:
- one or more variable energy collecting units producing respective direct current (DC) voltage levels;
- a bus;
- a first controller in communication with the units to enable the DC voltage levels to be compatible on the bus,
- a static inverter to which the bus delivers a DC compatible voltage level, wherein the static inverter converts the DC compatible voltage level to an alternating current;
- a pulse width modulation inverter to receive an alternating current output of the static inverter;
- and
- a second controller in communication with the static inverter and the pulse width modulation inverter to control the alternating current output from the static inverter to the pulse width modulation inverter.
4 more elements
A energy generation system, comprising:
- one or more variable energy collecting units to produce direct current (DC);
- a bus;
- a controller in communication with the units to maintain a desired voltage on the bus;
- a first static inverter to which the bus delivers the DC, wherein the first static inverter converts the DC received from the bus to an alternating current;
- and
- a second static inverter configured to receive the alternating current provided by the first static inverter and convert the alternating current received from first static inverter to a high voltage direct current.
3 more elements
Dependencies are inferred from the claim text.