Claims:CLAIM
1. An advance hybrid coupling energy accumulator system (100), the system(100) comprising:
an at least one photovoltaic array(102), the at least one photovoltaic array(102) having plurality of photovoltaic cells that generate the direct current;
a first DC bus(104), the first DC bus(104) is connected to the at least one photovoltaic array(102);
an at least one DC-DC converter(106), the at least one DC-DC converter(106) is connected to the at least one photovoltaic array(102) through the first DC bus(104);
an at least one inverter(108), the at least one inverter(108) having
a DC side(110), and
a GRID side(112);
a second DC bus(114), the second DC bus(114) connects the at least one DC-DC converter(106) and the DC side(110) of the at least one inverter(108);
an at least one energy accumulator(116), the at least one energy accumulator(116) is connected to the second DC bus(114); and
an at least one transformer(118), the GRID side of the at least one inverter(108) is connected to the at least one transformer(118);
wherein, the at least one transformer(118) is connected to the GRID system and step-up the voltage from the at least one inverter(108),
wherein, the at least one inverter(108) converts the direct current(DC) into the alternating current(AC).

2. The system(100) as claimed in claim 1, wherein the at least one DC-DC converter(106) controls the voltage from the at least one photovoltaic array(102) side.
3. The system(100) as claimed in claim 1, wherein the at least one DC-DC converter(106) controls the voltage of the at least one energy accumulator(116).
4. The system(100) as claimed in claim1, wherein the at least one DC-DC converter(106) includes a controller that monitors the output of the at least one photovoltaic array(102) and compares it to the at least one energy accumulator(116) voltage and calculates the maximum power that the at least one photovoltaic array(102) is able to supply to charge the at least one energy accumulator(116), and takes that power and converts that to best voltage to get maximum current into the at least one energy accumulator(116).
5. The system(100) as claimed in claim 1, wherein the at least one inverter(108) is bi-directional inverter.
6. The system(100) as claimed in claim 1, wherein the at least one DC-DC converter(106) maintains the voltage of the first DC bus(104) and the second DC bus(114).
7. The method for operation of an advance hybrid coupling energy accumulator system (100), the method comprising:
a direct current is produced by an at least one photovoltaic array(102);
a direct current is supplied to an at least one DC-DC converter(106), the through a first DC bus(104);
the at least one DC-DC converter(106) further supplies the direct current to an at least one energy accumulator(116) for charging and also to the at least one inverter(108);
the at least one inverter(108) converts the direct current into alternating current and supply to GRID through a transformer(118);
wherein, the transformer(118) increases the voltage of alternating current thus reducing the ampere for minimizing the transmission loss,
wherein, the inverter also takes direct current form the at least one energy accumulator(116) converts to the alternating current and supply to the GRID,
wherein, the at least one DC-DC converter(106) includes a controller that monitors the output of the at least one photovoltaic array(102) and compares it to the at least one energy accumulator(116) voltage and calculates the maximum power that the at least one photovoltaic array(102) is to supply to charge the at least one energy accumulator(116), and takes that power and converts that to best voltage to get maximum current into the at least one energy accumulator(116).
8. An advance hybrid DC coupling energy storage system(100), the system(100) comprising:
a photovoltaic array(102), the photovoltaic array(102) having plurality of photovoltaic cells that generates the direct current;
a first DC bus(104), the first DC bus(104) is connected to the photovoltaic array(102);
a DC-DC converter(106), the DC-DC converter(106) is connected to the photovoltaic array(102) through the first DC bus(104);
an inverter(108), the inverter(108) having
a DC side(110), and
a GRID side(112);
a second DC bus(114), the second DC bus(114) connects the DC-DC converter(106) and the DC side(110) of the inverter(108);
an energy accumulator(116), the energy accumulator(116) is connected to the second DC bus(114); and
a transformer(118), the GRID side of the inverter(108) is connected to the transformer(118);
wherein, the transformer(118) is connected to the GRID system and step-up the voltage from the inverter(108),
wherein, the inverter(108) converts the direct current(DC) into the alternating current(AC).
, Description:AN ADVANCE HYBRID COUPLING ENERGY ACCUMULATOR SYSTEM

FIELD OF THE INVENTION
The present invention relates to an energy accumulator system of a solar power plant, more specifically the present invention relates to an advance hybrid coupling energy accumulator system.

BACKGROUND
The problem of pollution is increasing exponentially. Therefore demand for energy is increasing day by day therefore more power plants are being setup. For any industry or household main source of energy is electricity. There is need to find a system and methods that produce the energy to meet the electricity demand. Hence a photovoltaic power plant is good alternative of conventional power plant. Solar energy is an important source of renewable energy. The photovoltaic power plant adds very less green house gas to earth’s atmosphere as compared to other conventional power plant. In order to generate more electricity from the power plant, performance of the solar power plant has to be increased. In order to increase performance of the solar power plant following factors play very important role: solar panel performance, proper operation of the solar power plant and minimum loses during electricity conversion, storage and transmission. One of the major problems is that variable voltages supply from the photovoltaic array causes inefficient charging of energy accumulator. Therefore, DC-DC converter is being used to maintain the constant voltage supply for GRID and the energy accumulator. But there is loss of power. The DC-DC converter is being used to maintain constant voltage between photovoltaic array and energy accumulator and inverter maintains voltage between the energy accumulator and GRID. But round trip efficiency is decreases because of topology of the arrangement of the device such as the DC-DC converter and the inverter. Thus cost of operation and monitoring is also increased.
US20120080943A1 discloses a power system includes a plurality of DC/DC converters and a DC/AC inverter. The plurality of DC/DC converters having outputs electrically connected in parallel for supplying a DC voltage bus to an input of the DC/AC inverter. The plurality of DC/DC converters each include a maximum power point tracker (MPPT). Various DC/DC converters and DC/AC inverters suitable for use in this system and others are also disclosed.
US8053929B2 discloses a solar power array includes solar power panels, where each solar panel provides output current and voltage, separate DC-DC converters, where each solar panel is connected to a unique DC-DC converter, where each DC-DC converter is designed to maximize the power from each solar panel, and where each DC-DC converter produces a high voltage output, a high voltage DC bus coupled to the DC-DC converters that receives the high voltage output, and a DC-AC inverter that inverts the high voltage DC on the high voltage DC bus to an AC power signal for distribution to one or more AC loads.

The existing inventions are not effective reducing power losses of the photovoltaic power plant. In the existing systems the DC-DC converter is not to simultaneously maintain the voltages of the photovoltaic array. The round trip efficiency of the existing invention is also poor. The present invention overcomes the deficiencies in the prior art. Hence there is needed of present invention in order to facilitate the effective operation of photovoltaic power plant.

OBJECTIVE OF THE INVENTION
The main objective of the present invention is to increase efficiency of the DC coupling of the photovoltaic power plant.
Yet another objective of the present invention is to automatically maintain constant the voltage from photovoltaic array.
Yet another objective of the invention is to automatically control the voltage supply to the energy accumulator.
Yet another objective of the invention is to increase round trip efficiency of the photovoltaic power plant.
Yet another objective of the invention is to provide best voltage to get maximum current into the energy accumulator to charge the energy accumulator efficiently.

Further objectives and features of the present invention will become apparent from the detailed description provided herein below, in which various embodiments of the disclosed present invention are illustrated by way of example and appropriate reference to accompanying drawings.

SUMMARY OF THE PRESENT INVENTION
The present invention relates to an advance hybrid coupling energy accumulator system. The system includes a photovoltaic array, a first DC bus, a DC-DC converter, an inverter, a second DC bus, and a transformer. The photovoltaic array includes plurality of photovoltaic cells that generates the direct current. The first DC bus is connected to the photovoltaic array. The DC-DC converter is connected to the photovoltaic array through the first DC bus. The inverter includes a DC side and a GRID side. The second DC bus connects the DC-DC converter and the DC side of the inverter. The energy accumulator is connected to the second DC bus. The GRID side of the inverter is connected to the transformer. Herein, the transformer is connected to the GRID system and step-up the voltage from the inverter. Herein, the inverter converts the direct current (DC) into the alternating current (AC). In an embodiment, herein the DC-DC converter maintains the voltage of the first DC bus and the second DC bus. The DC-DC converter includes a controller that monitors the output of the photovoltaic array and compares voltage to the energy accumulator voltage and calculates the maximum power that the photovoltaic array is able to supply to charge the energy accumulator, and takes that power and converts that to best voltage to get maximum current into the energy accumulator.
In an embodiment the present invention relates to a method for operation of an advance hybrid DC coupling energy storage system, the method includes: a direct current is produced by a photovoltaic array. The direct current is supplied to a DC-DC converter, the through a first DC bus. The DC-DC converter further supplies the direct current to the energy accumulator for charging and also supplies the direct current to an inverter. The inverter converts the direct current into alternating current and supply to GRID through a transformer.
An advantage of the present invention is that the present invention increases efficiency of the DC coupling of the solar power plant.
An another advantage of the present invention is that the present invention automatically maintains constant voltage from the photovoltaic array.
Yet another advantage of the present invention is that the present invention automatically controls the voltage supply to the energy accumulator.
Yet another advantage of the present invention is that the present invention is very reliable.
Yet another advantage of the present invention is that round trip efficiency of the photovoltaic power plant is increased.
Yet another advantage of the present invention is that the present invention provides best voltage to get maximum current into the energy accumulator to charge the energy accumulator efficiently.
Further advantages and features of the present invention will become apparent from the detailed description provided herein below, in which various embodiments of the disclosed present invention are illustrated by way of example and appropriate reference to accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings are incorporated in and constitute a part of this specification to provide a further understanding of the invention. The drawings illustrate one embodiment of the invention and together with the description, serve to explain the principles of the invention.
Fig.1 illustrates an advance hybrid coupling energy accumulator system.

DETAILED DESCRIPTION OF THE INVENTION
Definition
The terms “a” or “an”, as used herein, are defined as one or as more than one. The term “plurality”, as used herein, is defined as two or as more than two. The term “another”, as used herein, is defined as at least a second or more. The terms “including” and/or “having”, as used herein, are defined as comprising (i.e., open language). The term “coupled”, as used herein, is defined as connected, although not necessarily directly, and not necessarily mechanically.
The term “comprising” is not intended to limit inventions to only claiming the present invention with such comprising language. Any invention using the term comprising could be separated into one or more claims using “consisting” or “consisting of” claim language and is so intended. The term “comprising” is used interchangeably used by the terms “having” or “containing”.
Reference throughout this document to “one embodiment”, “certain embodiments”, “an embodiment”, “another embodiment”, and “yet another embodiment” or similar terms means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of such phrases or in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics are combined in any suitable manner in one or more embodiments without limitation.
The term “or” as used herein is to be interpreted as an inclusive or meaning any one or any combination. Therefore, “A, B or C” means any of the following: “A; B; C; A and B; A and C; B and C; A, B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or acts are in some way inherently mutually exclusive.
As used herein, the term "one or more" generally refers to, but not limited to, singular as well as plural form of the term.
The drawings featured in the figures are for the purpose of illustrating certain convenient embodiments of the present invention, and are not to be considered as limitation there to. Term “means” preceding a present participle of an operation indicates a desired function for which there is one or more embodiments, i.e., one or more methods, devices, or apparatuses for achieving the desired function and that one skilled in the art could select from these or their equivalent in view of the disclosure herein and use of the term “means” is not intended to be limiting.
Fig.1 illustrates an advance hybrid coupling energy accumulator system(100). The system(100) includes a photovoltaic array(102), a first DC bus(104), a DC-DC converter(106), an inverter(108), a second DC bus(114), an energy accumulator(116) and an transformer(118).The photovoltaic array(102) having plurality of photovoltaic cells. The first DC bus(104) is connected to the photovoltaic array(102). The DC-DC converter(106) is connected to the photovoltaic array(102) through the first DC bus(104). The inverter(108) includes a DC side(110) and a GRID side(112). The second DC bus(114) connects the DC-DC converter(106) and the DC side(110) of the inverter(108). The energy accumulator(116) is connected to the second DC bus(114). The GRID side of the inverter(108) is connected to the transformer(118).
The present invention relates to an advance hybrid coupling energy accumulator system. The system includes a photovoltaic array, a first DC bus, a DC-DC converter, an inverter, a second DC bus, an energy accumulator and a transformer. As used herein the term “photovoltaic array” generally refers to an interconnected system of PV modules that function as a single electricity-producing unit. The photovoltaic array includes plurality of photovoltaic cells that generate the direct current. The first DC bus is connected to the photovoltaic array. As used herein the term “DC Bus” generally refers to a conductor wire or a group of conductor wire used for collecting electric power from the incoming feeders and distributes them to the outgoing feeders. The DC-DC converter is connected to the photovoltaic array through the first DC bus. As used herein the term “DC-DC converter” generally refers to an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. The DC-DC converter is a type of electric power converter. In an embodiment, the DC-DC converter controls voltage from the photovoltaic array side. In an embodiment, the DC-DC converter controls the voltage of the energy accumulator. As used herein the term “energy accumulator” generally refers to a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power. The inverter includes a DC side and a GRID side. As used herein the term “inverter” generally refers an apparatus that converts direct current into alternating current. The second DC bus connects the DC-DC converter and the DC side of the inverter. The energy accumulator is connected to the second DC bus. The GRID side of the inverter is connected to the transformer. In an embodiment, the inverter is bi-directional inverter. Herein, the transformer is connected to the GRID system and step-up the voltage from the inverter. Herein, the inverter converts the direct current(DC) into the alternating current(AC). In an embodiment, herein the DC-DC converter maintains the voltage of the first DC bus and the second DC bus. In an embodiment, herein the DC-DC converter includes a controller that monitors the output of the photovoltaic array and compares voltage to the energy accumulator voltage and calculates the maximum power that the photovoltaic array is able to supply to charge the energy accumulator, and takes that power and converts that to best voltage to get maximum current into the energy accumulator.
In an embodiment, the present invention relates to an advance hybrid coupling energy accumulator system, the system includes one or more photovoltaic arrays, a first DC bus, one or more DC-DC converters, one or more inverters, a second DC bus, one or more energy accumulators and one or more transformers. The one or more photovoltaic arrays include plurality of photovoltaic cells that generate the direct current. The first DC bus is connected to the one or more photovoltaic arrays. The one or more DC-DC converters are connected to the one or more photovoltaic arrays through the first DC bus. In an embodiment, the one or more DC-DC converters control voltage from the one or more photovoltaic arrays side. In an embodiment, the one or more DC-DC converters control the voltage of the one or more energy accumulators. The one or more inverters include a DC side and a GRID side. The second DC bus connects the one or more DC-DC converters and the DC side of the one or more inverters. The one or more energy accumulators are connected to the second DC bus. The GRID side of the one or more inverters is connected to the one or more transformers. In an embodiment, the one or more inverters are bi-directional inverters. Herein, the one or more transformers are connected to the GRID system and step-up the voltage from the one or more inverters. Herein, the one or more inverters convert the direct current(DC) into the alternating current(AC). In an embodiment, herein the one or more DC-DC converters maintain the voltage of the first DC bus and the second DC bus. In an embodiment, herein the one or more DC-DC converters include a controller that monitors the output of the one or more photovoltaic arrays and compares voltage to the one or more energy accumulators voltage and calculates the maximum power that the one or more photovoltaic arrays are able to supply to charge the one or more energy accumulators, and take that power and converts that to best voltage to get maximum current into the one or more energy accumulators.
In an embodiment the present invention relates to a method for operation of an advance hybrid coupling energy accumulator system, the method includes:
a direct current is produced by a photovoltaic array;
a direct current is supplied to a DC-DC converter, the through a first DC bus;
the DC-DC converter further supplies the direct current to a energy accumulator for charging and also supplies the direct current to an inverter;
the inverter converts the direct current into alternating current and supply to GRID through a transformer.
Herein, the transformer increases the voltage of alternating current thus reducing the ampere for minimizing the transmission loss. Herein, the inverter also takes direct current form the energy accumulator converts to the alternating current and supply to the GRID. Herein the DC-DC converter includes a controller that monitors the output of the photovoltaic array and compares voltage to the energy accumulator voltage and calculates the maximum power that the photovoltaic array is able to supply to charge the energy accumulator, and takes that power and converts that to best voltage to get maximum current into the energy accumulator.
In an embodiment the present invention relates to a method for operation of an advance hybrid coupling energy accumulator system, the method includes:
a direct current is produced by one or more photovoltaic arrays;
a direct current is supplied to one or more DC-DC converters, the through a first DC bus;
the one or more DC-DC converter further supply the direct current to one or more energy accumulators for charging and also supply the direct current to the one or more inverters;
the one or more inverters convert the direct current into alternating current and supply to GRID through one or more transformers.
Herein, the one or more transformers increase the voltage of alternating current thus reducing the ampere for minimizing the transmission loss. Herein, the one or more inverters also take direct current form the one or more energy accumulators convert to the alternating current and supply to the GRID. Herein the one or more DC-DC converters include a controller that monitors the output of the one or more photovoltaic arrays and compares voltage to the one or more energy accumulators voltage and calculates the maximum power that the one or more photovoltaic arrays are able to supply to charge the one or more energy accumulators, and takes that power and converts that to best voltage to get maximum current into the one or more energy accumulators.
Further objectives, advantages and features of the present invention will become apparent from the detailed description provided herein below, in which various embodiments of the disclosed present invention are illustrated by way of example and appropriate reference to accompanying drawings. Those skilled in the art to which the present invention pertains may make modifications resulting in other embodiments employing principles of the present invention without departing from its spirit or characteristics, particularly upon considering the foregoing teachings. Accordingly, the described embodiments are to be considered in all respects only as illustrative, and not restrictive, and the scope of the present invention is, therefore, indicated by the appended claims rather than by the foregoing description or drawings. Consequently, while the present invention has been described with reference to particular embodiments, modifications of structure, sequence, materials and the like apparent to those skilled in the art still fall within the scope of the invention as claimed by the applicant.