All publications and patent applications mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.
The present invention relates to a renewable energy inverter, in particular, to an all-in-one controller and micro-inverter with data gathering, analysis and connectivity capability.
Micro-inverters offer a means for providing ready-to-use alternating current (AC) at the point of an energy source, which makes them attractive for distributed energy generation systems of varying capacities such as wind or solar energy systems. Micro-inverters offer the added advantages of modularity, maximum power efficiency, real-time optimization, and superior means for monitoring and control of the overall system. Micro-inverters offer these benefits with minimal changes to the existing wiring in a building. Because of these benefits the use of micro-inverters are on the rise year to year.
As global concern for the environment and energy sustainability grows, the prevalence of solar power, wind power and other renewable energy sources has increased correspondingly. Renewable decentralized power generation systems typically include two major parts: power generators that produce the power, and inverters that receive, condition, and inject the power into the power load. Power generators include, for example, photovoltaic (PV) cells and wind turbines, small hydro turbines, and biomass & gas systems. As a result, a need remains for improvements to decentralized power generation systems.
In general, in one embodiment, a self-contained electrical box configured to convert two or more dissimilar electrical inputs into a single electrical output includes a maximum power point tracking (MPPT) controller, an inverter under control of a microprocessor and an electrical connector. A first electrical connector, a second electrical connector or a third electrical connector is in communication with the MPPT controller or the inverter. An electrical output from the inverter or the MPPT controller is based on an electrical input to the first electrical connector, the second electrical connector or the third electrical connector.
This and other embodiments can include one or more of the following features. The input to the first electrical connector, the electrical second connector or the third electrical connector can be from 12V to 450V. The electrical input to the first electrical connector, the electrical second connector or the third electrical connector can be an AC electrical signal or a DC electrical signal. The electrical input to the first electrical connector, the second electrical connector or the third electrical connector can be a single phase or 3 phases. The MPPT controller can be a programmable MPPT controller. The programmable MPPT controller can further include computer readable instructions to receive, optimize and manage electrical inputs from the first electrical connector, the second electrical connector or the third electrical connector provided from a wind turbine and a solar panel or any other variable output generator. The self-contained electrical box can further include an electrical connector for communication with an energy storage device. The inverter can be adapted to deliver energy to an AC electrical load in communication with the electrical output of the self-contained electrical box. The self-contained electrical box can be adapted and configured to receive inputs from one or more sensors or one or more electrical signals from an electrical generator connected to the first, the second or the third electrical connector to gather data related to meteorological conditions at the electrical generator providing the information. The self-contained electrical box can be adapted and configured to receive inputs from one or more sensors and electrical signals from an electrical generator connected to the first, the second or the third electrical connector to gather information regarding the performance, operation or characteristic of the electrical generator providing the information. The self-contained electrical box can further include computer readable instructions performed by the microprocessor to analyze electrical signals and gather information regarding grid energy use. The self-contained electrical box can further include computer readable instructions performed by the microprocessor to analyze electrical waves signals and to gather information about the use and consumption or specific electrical signature from appliances and devices in the same network. The self-contained electrical box can further include computer readable instructions to uniquely identify and to trace electronically each parameter gathered by operation of the self-contained electrical box or for implementation of a blockchain technology to electronically sign each parameter gathered during operation of the self-contained electrical box. The self-contained electrical box can further include a communication module for connection to a platform to send information using communication technologies like WIFI or GSM. The self-contained electrical box can be adapted and configured for remote connection to another self-contained electrical box using a communication technologies like WIFI or GSM. The self-contained electrical box can further include computer readable instructions for the microprocessor to process the gathered information. The self-contained electrical box can further include computer readable instructions related to using one or more algorithms, or an artificial intelligence process to analyze the information gathered during use of one or more of the self-contained electrical boxes. The self-contained electrical box can be adapted and configured for connection to an electrical load wherein the electrical outlet can be configured for coupling to a conventional electrical female socket. The self-contained electrical box can be adapted and configured to control the use of the energy and the electrical waves signals from the analyzed information. The self-contained electrical box can be adapted and configured for operation in a stand-alone or off grid electrical system. The self-contained electrical box can be adapted and configured for operation as a part of a micro-grid. The self-contained electrical box can be adapted and configured for operation as a grid-tie system.
In general, in one embodiment, a device for transferring energy from a power generator, includes a controller configured to receive and stabilize power received from one or more power generators and output direct voltage, a microinverter configured to receive and modify a direct voltage signal and output an alternating current, the microinverter configured to be plugged directly into a standard power outlet, and a communications module configured to gather data from the controller and microinverter and upload the data to a cloud platform.
In general, in one embodiment, a method of providing a single electrical power output from two or more different electrical inputs includes: (1) receiving a first electrical power signal from a first electrical power source and a second different electrical power signal from a second electrical power source; (2) processing the first and the second power signals to provide a single electrical output; and (3) providing the single electrical output to a standard female power outlet.
This and other embodiments can include one or more of the following features. The first electrical power signal and the second electrical power signal can be selected from a three phase AC power source, a single phase AC power source or a DC power source. The first power source or the second power source can be provided by a turbine driven by interaction with wind or water. The first power source of the second power source can be a photovoltaic system. The first electrical power signal and the second electrical power signal can be processed to provide a unique signature and certification for tracing the power provided from the first electrical power source and the second electrical power source. The single electrical output can be provided to a storage device. The method can further include a third electrical power signal. The first electrical power signal, the second electrical power signal or the third electrical power signal can be from 12V to 450V. The first electrical power signal, the second electrical power signal or the third electrical power signal can be an AC electrical signal or a DC electrical signal. The first electrical power signal, the second electrical power signal or the third electrical power signal can be a single phase or 3 phases. The method of the processing step can further include operation of a programmable MPPT controller having computer readable instructions to receive, optimize and manage electrical inputs from the first electrical power signal, the second electrical power signal or the third electrical power signal provided from a wind turbine and a solar panel. The method can further include computer readable instructions for providing the single electrical output in a form acceptable to an energy storage device. The method of the processing step can further include operation of an inverter adapted to deliver the single electrical output to an AC electrical load. The method can further include processing steps adapted and configured to receive inputs from one or more sensors or one or more electrical signals from a first electrical generator, a second electrical generator or a third electrical generator; and gathering data related to meteorological conditions at the first, the second or the third electrical generator providing the information. The method can further include processing steps adapted and configured to receive inputs from one or more sensors and electrical signals from an electrical generator providing the first, the second or the third electrical signal to gather information regarding the performance, operation or characteristic of the electrical generator providing the information. The method can further include processing steps having computer readable instructions to analyze electrical signals and gather information regarding grid energy use. The method can further include processing steps having computer readable instructions to analyze electrical waves signals and to gather information about the use and consumption or specific electrical signature from appliances and devices in the same network. The method can further include processing steps having computer readable instructions to uniquely identify and to trace electronically each parameter gathered or for implementing a blockchain technology for electronically signing each parameter gathered during operations for receiving electrical signals and providing an electrical output. The method can further include communicating to a platform and sending information to a remote computer system. The method can further include computer readable instructions for processing gathered information. The method can further include computer readable instructions related to using one or more algorithms, or an artificial intelligence process to analyze the information gathered by receiving and processing the first, the second or the third electrical signal. The method can further include computer readable instructions adapted and configured to control the use of the energy from the analyzed information. The method can further include processing steps having computer readable instructions to analyze electrical waves signals and to gather information about the use and consumption or specific electrical signature one or more individual electrical appliances or devices in the same network and thereafter, providing controlling functions for the operation of each one of the one or more individual electrical appliances or devices based on operations related to the specific electrical wave signature. The method can further include computer readable instructions adapted and configured to control the use of the energy for operation in a stand-alone or off grid electrical system, as a part of a micro-grid system or a grid-tie system. The self-contained electrical box can further include a display configured to display information, settings, operational parameters, and user preferences related to the self-contained electrical box. The display can be configured as a user interface screen adapted and configured to provide touch screen capabilities for operation of the self-contained electrical box. The method can further include providing information related to providing a single electrical power output on a display. The method can further include interacting with a touch screen operation of the display to manipulate the operations of the steps for providing a single electrical power output.
Generation usually harvests electric energy as AC or DC. Input DC can be converted to usable AC power using an inverter. Within the inverter in some embodiments, there are two main sub-circuits, a DC/DC converter followed by a full-bridge inverter. The first sub-circuit is a DC/DC voltage converter that converts the input DC power from the renewable source to a DC voltage that can be used by the subsequent inverter. The second sub-circuit is a DC/AC inverter that converts the DC output of the converter to AC power compatible to the power grid.
In exemplary “off-grid” applications, to provide stable power supply, and “in-grid” tie system, to use as a backup or to reduce grid consumption, energy storage devices can be added to the system. Embodiments of the micro-inverters described herein are compatible with any of a variety of different energy technologies like lead acid batteries, lithium ion technology batteries and fuel cells.
Embodiments of the present invention overcome the challenges presented wherein these energy storage devices require a separate controller or inverter if they are connected to a grid tie solution or off grid applications. At the same time, embodiments of the inventive micro-inverter provide solutions that can work with both AC/DC storage device types in a nimble way.
In conventional systems, independent control and power extraction is typically required for each power generator in order to increase the overall efficiency of power generators under different conditions. Varying load conditions include changing wind conditions on wind turbines, partial shadowing of PV cells, or mismatches between PV cells. Conventionally, such mismatches requires use of a separate inverter, i.e., a “micro-inverter,” for each power generator. Power extraction from each power generator may be enhanced if each power generator performs maximum power point tracking (MPPT) independently. In contrast to conventional systems, the inventive micro-inverter includes capabilities for independent control and power extraction for two or more dissimilar power inputs (see
Conventional MPPT systems often use an algorithm based on trial and error, seek and find, or logical and relational operators, that finds the best operating point and creates a MPPT reference signal. However, such an approach may lead to oscillation around the optimum point, which adversely impact the overall efficiency of the system. Moreover, trial and error approaches degrade efficiency for fast changing conditions. This drawback and the low speed characteristic of such approaches may be problematic in conditions such as monotonic and fast increases of the irradiation level, or variable wind conditions. These and other shortcomings of conventional MPPT approaches are overcome by the techniques utilized by embodiments of the micro-inverter described herein.
Wind turbines have gained widespread use for electricity generation in recent years, and one growing market is the small-scale turbine for battery charging or residential use. Small-scale wind turbines typically utilize a permanent magnet alternator to convert the rotational power produced by the turbine rotor into useful electrical power. Permanent magnet alternators have many advantages that make them well suited for use in a wind turbine. Their simplicity, durability, and efficiency are excellent for wind turbine applications.
Permanent magnet alternator power output increases linearly with rotational speed, whereas for a wind turbine to maintain optimum aerodynamic efficiency, the alternator power should increase with the cube of the rotational speed. Designing a wind turbine to operate at maximum efficiency at a design wind speed, while operating at sub-optimum efficiency at all other wind speeds, typically circumvents this problem. The next problem occurs when an alternator is directly coupled to a wind turbine rotor, causing its output to be at a low voltage unless a large number of turns of very fine wire were used in constructing the windings. Using such fine wire results in high electrical resistance and low efficiency.
A permanent magnet alternator typically includes three sets of windings in the stator and the alternator output is three-phase power with varying voltage and frequency. In order to use the output power for battery charging or other useful purposes, the output is typically rectified to direct current (DC) and once again to alternative current (AC) if needed.
While these components are provided as different parts of a renewable system, the required technical skills usually required to install, operate and maintain these disparate systems is now provided using simple connections in the various embodiments of the micro-inverter.
In still other embodiments to address solutions as part of decentralized energy generation, storage and delivery, various embodiments of the micro-inverter may also include communications and connectivity to a remote computing platform or cloud for gathering real-time information related to energy generation, storage, transmission, utilization as well as other aspects of operation and energy management improvements.
In still further micro-inverter embodiments, there is provided capability for managing and analyzing energy data. In one aspect, there is provided one or more algorithms to analyze energy information either within a micro-inverter or using remote computing systems. In still other embodiments, there is provided an artificial intelligence systems allowing the individual or connected micro-inverters to become smart, including decision making processes within certain parameters or as determined by one or more energy generation protocols, energy supply protocols, energy delivery protocols, device utilization protocols or energy storage protocols alone or in combination.
In still further embodiments, the energy collected, stored, shared, received or processed by a micro-inverter is provided with a unique identifier. In one embodiment, the processor of a micro-inverter generates an electronic signature sufficient to identify each system and to provide traceability for energy interactions with a specific micro-inverter. In one aspect, the electronic signature is provided by a block chain enabled system. In another aspect, each micro-inverter is adapted and configured to have validation on every value generated, and traceability in the transaction of those assets.
The input for the MPPT controller 110 can vary from 12V to 450 V, depending on the source, the model, and type of energy power unit. The current output from the controller 110 can be direct or alternating. The controller 110 rectifies the voltage to stabilize the waves and amplitudes from unstable sources. The DC current from the MPPT controller 110 feeds into the inverter 120 side of the system.
The inverter 120 modifies the current from DC to AC, with outputs from 110V to 380V and 50 Hz or 60 Hz depending on the models.
The micro-inverter system recognizes and adjusts itself to different energy input sources considering types of currents and voltages, making it nimble and versatile.
Additionally or optionally, the micro-inverter 100 includes hardware and software or instructions for operations with energy storage devices having built in charge management software. In still other configurations, a micro-inverter 100 may be configured to send or receive energy from other energy devices such as fuel cells or electric vehicles.
Similarly, if the sources are not generating energy or if the internal consumption is greater than the energy generated by those sources, the Micro-inverter 100 disposes of the energy stored in the storage devices and sends it to one or more of the loads, depending on configuration. If there is not enough energy in the storage device, the Micro-inverter 100 takes the differential energy needed from the grid. The discharge rate and the usage of the storage device can be settled to keep part of that energy to be used in case of a disconnection from the grid, like a power outage. The battery can be used as a device to reduce peak consumptions or as a back up solution. The loads can be of different kinds, like a house, a cell phone tower, a building, etc. The storage devices can be cell fuels, batteries, or electric vehicles.
The raw data gathered includes power generation, power consumption, status of the grid, consumption levels by appliance, wind speed, pressure, temperatures, sun radiation, and current storage level, among others.
From the Cloud platform that information can be accessed through any smart device, like cellphones or laptops as shown in
The features described in the illustrative examples of
Advantageously, under the configuration illustrated in
As an example, in this diagram, the micro-grid is includes different kinds of loads. A micro-grid load can be one or more or a combination of different kinds or structures or standalone facilities or free standing infrastructure components. Examples of structures are wide ranging and vary depending on use and may include one or more of single family homes, multiple family homes, telecommunication towers, apartment buildings, commercial buildings, medical clinics, hospitals, warehouses, and industrial facilities, among others.
Still further, if there is not a system requiring energy and the units are generating more energy than what is internally consumed or stored, the system can send this energy surplus to the grid, to be transmitted and used in other loads. This energy supplied to the grid is also being tracked by the same block chain technology. If any of the systems has not enough self-generation, an energy demand requirement can be sent to other Micro-inverter 100 or nodes, or to the main grid, getting the energy from another Micro-inverter 100 or and external source connected to the grid.
The exchange of the energy by each node or Micro-inverter 100 with each other, or with the grid, can be done using conventional currencies, other accountability methods like credit or debit notes or cryptocurrencies like for example tokens.
Additional details for various components or operations of energy generation or storage systems are available in: U.S. Pat. No. 5,601,951; US Patent Publication 20120170325; WO 2015065291; U.S. Pat. Nos. 8,612,058; 7,274,975; 7,561,977; 7,218,974; US Patent Publication 2017/0180134, each of which is incorporated herein by reference in its entirety for all purposes.
When a feature or element is herein referred to as being “on” another feature or element, it can be directly on the other feature or element or intervening features and/or elements may also be present. In contrast, when a feature or element is referred to as being “directly on” another feature or element, there are no intervening features or elements present. It will also be understood that, when a feature or element is referred to as being “connected”, “attached” or “coupled” to another feature or element, it can be directly connected, attached or coupled to the other feature or element or intervening features or elements may be present. In contrast, when a feature or element is referred to as being “directly connected”, “directly attached” or “directly coupled” to another feature or element, there are no intervening features or elements present. Although described or shown with respect to one embodiment, the features and elements so described or shown can apply to other embodiments. It will also be appreciated by those of skill in the art that references to a structure or feature that is disposed “adjacent” another feature may have portions that overlap or underlie the adjacent feature.
Terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. For example, as used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items and may be abbreviated as “/”.
Spatially relative terms, such as “under”, “below”, “lower”, “over”, “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is inverted, elements described as “under” or “beneath” other elements or features would then be oriented “over” the other elements or features. Thus, the exemplary term “under” can encompass both an orientation of over and under. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Similarly, the terms “upwardly”, “downwardly”, “vertical”, “horizontal” and the like are used herein for the purpose of explanation only unless specifically indicated otherwise.
Although the terms “first” and “second” may be used herein to describe various features/elements (including steps), these features/elements should not be limited by these terms, unless the context indicates otherwise. These terms may be used to distinguish one feature/element from another feature/element. Thus, a first feature/element discussed below could be termed a second feature/element, and similarly, a second feature/element discussed below could be termed a first feature/element without departing from the teachings of the present invention.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word “comprise”, and variations such as “comprises” and “comprising” means various components can be co-jointly employed in the methods and articles (e.g., compositions and apparatuses including device and methods). For example, the term “comprising” will be understood to imply the inclusion of any stated elements or steps but not the exclusion of any other elements or steps.
As used herein in the specification and claims, including as used in the examples and unless otherwise expressly specified, all numbers may be read as if prefaced by the word “about” or “approximately,” even if the term does not expressly appear. The phrase “about” or “approximately” may be used when describing magnitude and/or position to indicate that the value and/or position described is within a reasonable expected range of values and/or positions.
For example, a numeric value may have a value that is +/−0.1% of the stated value (or range of values), +/−1% of the stated value (or range of values), +/−2% of the stated value (or range of values), +/−5% of the stated value (or range of values), +/−10% of the stated value (or range of values), etc. Any numerical values given herein should also be understood to include about or approximately that value, unless the context indicates otherwise. For example, if the value “10” is disclosed, then “about 10” is also disclosed. Any numerical range recited herein is intended to include all sub-ranges subsumed therein. It is also understood that when a value is disclosed that “less than or equal to” the value, “greater than or equal to the value” and possible ranges between values are also disclosed, as appropriately understood by the skilled artisan. For example, if the value “X” is disclosed the “less than or equal to X” as well as “greater than or equal to X” (e.g., where X is a numerical value) is also disclosed. It is also understood that the throughout the application, data is provided in a number of different formats, and that this data, represents endpoints and starting points, and ranges for any combination of the data points. For example, if a particular data point “10” and a particular data point “15” are disclosed, it is understood that greater than, greater than or equal to, less than, less than or equal to, and equal to 10 and 15 are considered disclosed as well as between 10 and 15. It is also understood that each unit between two particular units are also disclosed. For example, if 10 and 15 are disclosed, then 11, 12, 13, and 14 are also disclosed.
Although various illustrative embodiments are described above, any of a number of changes may be made to various embodiments without departing from the scope of the invention as described by the claims. For example, the order in which various described method steps are performed may often be changed in alternative embodiments, and in other alternative embodiments one or more method steps may be skipped altogether. Optional features of various device and system embodiments may be included in some embodiments and not in others. Therefore, the foregoing description is provided primarily for exemplary purposes and should not be interpreted to limit the scope of the invention as it is set forth in the claims.
The examples and illustrations included herein show, by way of illustration and not of limitation, specific embodiments in which the subject matter may be practiced. As mentioned, other embodiments may be utilized and derived there from, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure. Such embodiments of the inventive subject matter may be referred to herein individually or collectively by the term “invention” merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept, if more than one is, in fact, disclosed. Thus, although specific embodiments have been illustrated and described herein, any arrangement calculated to achieve the same purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, will be apparent to those of skill in the art upon reviewing the above description.
This application claims priority to U.S. Provisional Patent Application Ser. No. 62/472,469 titled “Micro Inverter and Controller” filed on Mar. 16, 2017, which is incorporated herein by reference in its entirety for all purposes.
Filing Document | Filing Date | Country | Kind |
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PCT/US2018/022811 | 3/16/2018 | WO | 00 |
Number | Date | Country | |
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62472469 | Mar 2017 | US |