Method for use of static inverters in variable energy generation environments
First Claim
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1. A method of generating energy, comprising:
- producing a first direct current via one or more variable energy collecting units;
delivering the first direct current to a first inverter via a bus, wherein a first inverter has a predetermined, fixed voltage conversion ratio;
converting the first direct current to an alternating current via the first inverter;
delivering the alternating current to a second converter, wherein the second converter has a predetermined, fixed voltage conversion ratio; and
converting by the second converter the alternating current to a second direct current having a voltage configured for transmission to a master inverter, wherein the master inverter has a predetermined, fixed voltage conversion ratio.
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Abstract
A system and method 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.
76 Citations
18 Claims
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1. A method of generating energy, comprising:
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producing a first direct current via one or more variable energy collecting units; delivering the first direct current to a first inverter via a bus, wherein a first inverter has a predetermined, fixed voltage conversion ratio; converting the first direct current to an alternating current via the first inverter; delivering the alternating current to a second converter, wherein the second converter has a predetermined, fixed voltage conversion ratio; and converting by the second converter the alternating current to a second direct current having a voltage configured for transmission to a master inverter, wherein the master inverter has a predetermined, fixed voltage conversion ratio. - View Dependent Claims (2, 3)
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4. A method, comprising:
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connecting a pair of converters between a first direct current bus and a second direct current bus, the second direct current bus having a voltage higher than the first direct current bus, the pair of converters having a first converter and a second converter, wherein the first converter has a predetermined, fixed voltage conversion ratio and the second converter has a predetermined, fixed voltage conversion ratio; converting, by the first converter, a power input from the first direct current bus into an alternating current; and converting, by the second converter, the alternating current generated by the first converter into a power output into the second direct current bus. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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connecting a first inverter and a second converter between a local variable power generation system and a transmission line having a direct current voltage higher than an output voltage of the local variable power generation system, wherein the first inverter has a predetermined, fixed voltage conversion ratio and the second converter has a predetermined, fixed voltage conversion ratio; converting, by the first inverter, the output of the local variable power generation system into an alternating current; and powering, by the second converter, the transmission line using the alternating current generated by the first inverter. - View Dependent Claims (16, 17, 18)
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Specification