Architecture for power plant comprising clusters of power-generation devices

• US 9,136,704 B2
• Filed: 07/08/2014
• Issued: 09/15/2015
• Est. Priority Date: 05/19/2009
• Status: Active Grant

• Current Assignee: Maxout Renewables, Inc.
• Original Assignee: Maxout Renewables, Inc.
• Inventors: Cummings, Eric Bryant
• Primary Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US14/326,246
• Publication Number:
  US 20140321057A1
• Time in Patent Office: 434 Days
• Field of Search: 307/151
• US Class Current: 1/1
• CPC Class Codes: H01L 31/02021 for solar cells electrical connection means, e.g. junction boxes, specially adapted for structural association with photovoltaic modules H02S40/34
• CPC Class Codes: H02J 1/102 being switching converters H02J1/108, H02J1/12 take precedence
• CPC Class Codes: H02J 1/106 for load balancing, symmetrisation, or sharing
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02M 1/0043 Converters switched with a phase shift, i.e. interleaved non-isolated DC/DC converters H02M3/1586
• CPC Class Codes: H02M 7/493 the static converters being arranged for operation in parallel
• CPC Class Codes: Y02E 10/52 PV systems with concentrators
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

Various techniques are employed alone or in combination, to reduce the levelized cost of energy imposed by a power plant system. Solar energy concentrators in the form of inflated reflectors, focus light onto photovoltaic receivers. Multiple concentrators are grouped into a series-connected cluster that shares control circuitry and support structure. Individual concentrators are maintained at their maximum power point via balance controllers that control the flow of current that shunts this series connection. DC current from clusters is transmitted moderate distances to a centralized inverter. The inductance of transmission lines is maximized using an air-spaced twisted pair, enhancing the performance of boost-type three phase inverters. Cluster outputs are separate from individual inverters in massively interleaved arrays co-located at a central location. Step-up transformers convert inverter voltages to grid voltages, and small transformers provide isolation and voltage step-up only on receiver-to-receiver imbalance currents, typically <20% of the total current.

Claims

1. An inverter phase module comprising:

a housing having a top, bottom and sides extending along a longitudinal length of the housing, the sides of the housing each having rails configured to guide the inverter phase module into a slot of a rack, the top of the housing including a plurality of recesses each for receiving an electronic device;

a printed circuit board disposed within the housing and aligned with the plurality of recesses on the top of the housing;

a plurality of electronic devices each disposed within one of the plurality of recesses and each removably coupled to the printed circuit board, each of the plurality of electronic devices having a backside that protrudes above the top of the housing; and

a cooling plate coupled to the housing and contacting the backside of each of the plurality of electronic devices, wherein a contact force between the cooling plate and the backside of each electronic device is greater than an insertion force required to removably couple the electronic device to the printed circuit board.

2. The inverter phase module of claim 1, wherein each of the plurality of electronic devices includes a heat-transfer plate and a cover, the heat transfer plate forming the backside of each of the plurality of electronic devices.

3. The inverter phase module of claim 2, wherein the heat transfer plate includes protuberances configured to interlock with corresponding receiving features of the cooling plate.

4. The inverter phase module of claim 2, wherein the plurality of electronic components include a MOSFET switch or an IGBT switch and a switch driver circuit.

5. The inverter phase module of claim 2, wherein the plurality of electronic components include at least one electrolytic capacitor.

6. The inverter phase module of claim 2, wherein the cover includes a vent configured to allow gases to pass therethrough that are produced by a failure of one or more of the plurality of electronic devices.

7. The inverter phase module of claim 1, wherein the cooling plate is configured to receive a liquid to cool the plurality of electronic devices.

8. An electronic module comprising:

a housing having a top, bottom and sides extending along a longitudinal length of the housing, the sides of the housing each having rails configured to guide the electronic module into a slot of a rack, the top of the housing including a plurality of recesses each for receiving an electronic device;

a printed circuit board disposed within the housing and aligned with the plurality of recesses on the top of the housing;

a plurality of electronic devices each disposed within one of the plurality of recesses and each removably coupled to the printed circuit board, at least a portion of the plurality of electronic devices each having a backside that protrudes above the top of the housing;

a cooling plate coupled to the housing and contacting the backside of the portion of the plurality of electronic devices; and

a means for providing a contact force between the cooling plate and the backside of the portion of the plurality of electronic devices, where the contact force between each electronic device of the portion of the plurality of electronic devices is greater than an insertion force required to removably couple the electronic device to the printed circuit board.