CN214045159U - Roof photovoltaic and micro-grid bidirectional power supply system for residential users - Google Patents
Roof photovoltaic and micro-grid bidirectional power supply system for residential users Download PDFInfo
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- CN214045159U CN214045159U CN202021144725.5U CN202021144725U CN214045159U CN 214045159 U CN214045159 U CN 214045159U CN 202021144725 U CN202021144725 U CN 202021144725U CN 214045159 U CN214045159 U CN 214045159U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model relates to a little electric wire netting power supply system, concretely relates to towards resident user's roof photovoltaic and little electric wire netting two-way power supply system. The bidirectional power supply system includes: the system comprises a roof photovoltaic assembly, a resident user load, a storage battery, a controller and a micro-grid; the controller comprises a first control module, a second control module, a third control module, a fourth control module, a central control module and a microgrid control center; photovoltaic module installs on resident user's roof, and roof photovoltaic module connects on the battery through first control module, and the battery passes through the second control module and links to each other with resident user load, and the battery passes through the third control module and links to each other with little electric wire netting, and resident user load passes through the fourth control module and links to each other with little electric wire netting. The utility model has the advantages that: the system has simple structure and reasonable design; the power supply state of the micro-grid to the load of the resident user can be flexibly controlled; the photovoltaic absorption and utilization of the distributed roof are effectively promoted.
Description
Technical Field
The utility model relates to a little electric wire netting power supply system, concretely relates to towards resident user's roof photovoltaic and little electric wire netting two-way power supply system.
Background
Solar energy is clean and low-carbon renewable energy, and distributed roof photovoltaic power generation is used as a main solar energy utilization form, so that the coordinated development of energy utilization and environmental protection is facilitated. The bidirectional flexible power supply system for the photovoltaic roof and the microgrid belongs to the technical field of emerging flexible power supply of the microgrid generated under the background. In recent years, the operation mode of roof photovoltaic power generation, a grid-connected management mechanism, an electricity price guide policy and other aspects are researched and practiced, and partial scholars propose roof photovoltaic power generation operation modes such as 'user self-construction, general purchase and general sale' and design a roof photovoltaic and energy storage integrated power generation system; the national grid company also issues management rules such as 'opinions about doing distributed photovoltaic power generation grid-connected service work'; the research and practice clears technical barriers for development and popularization of the distributed roof photovoltaic power generation, policy support and economic incentive are provided, and large-scale popularization and construction of the distributed roof photovoltaic power generation in China are promoted. Then, the problems of absorption and utilization of distributed roof photovoltaic power generation and disturbance and impact of power fluctuation of distributed roof photovoltaic power generation on a connected micro-grid are to be researched and solved.
Under the above background, research roof photovoltaic power generation and little electric wire netting are to nimble two-way power supply system of resident user load, with roof photovoltaic power generation storage in the storage battery, preferentially satisfy resident user load power consumption demand, when the battery holds full electric quantity state, utilize remaining photovoltaic power generation to supply power to little electric wire netting, when the battery surplus electric quantity is difficult to satisfy resident user load demand, change by little electric wire netting to resident user load power supply. Therefore, a flexible bidirectional power supply system which realizes the maximum photovoltaic utilization of the distributed roof and reduces the disturbance of photovoltaic power fluctuation to the microgrid is expected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's defect, providing one kind can control roof photovoltaic and little electric wire netting in a flexible way and to the power supply direction and the power size of resident user load, can effectively promote the two-way nimble power supply system of roof photovoltaic and little electric wire netting that distributed roof photovoltaic consumed the utilization.
In order to achieve the purpose, the invention adopts the technical scheme that:
a residential customer-oriented rooftop photovoltaic and microgrid bi-directional power supply system, comprising: the system comprises a roof photovoltaic assembly, a resident user load, a storage battery, a controller and a micro-grid;
the controller comprises a first control module, a second control module, a third control module, a fourth control module, a central control module and a microgrid control center;
photovoltaic module installs on resident user's roof, and roof photovoltaic module connects on the battery through first control module, and the battery passes through the second control module and links to each other with resident user load, and the battery passes through the third control module and links to each other with little electric wire netting, and resident user load passes through the fourth control module and links to each other with little electric wire netting.
Further, the first control module of the bidirectional flexible power supply system comprises a DC/DC converter and a DC/DC converter control unit;
the control unit of the DC/DC converter is connected with the central control module through a communication line, sends the power generating capacity of the roof photovoltaic to the central control module, receives a control instruction of the central control module, sends a control signal to the DC/DC converter and controls the power transmission capacity of the roof photovoltaic to the storage battery.
Further, the second control module of the bidirectional flexible power supply system comprises a first DC/AC converter and a first DC/AC converter control unit;
the first DC/AC converter control unit is connected with the central control module through a communication line, sends the residual electric quantity of the storage battery to the central control module, receives a control instruction of the central control module, sends a control signal to the first DC/AC converter and controls the power supply power of the storage battery to the load of the resident user.
Further, a third control module of the bidirectional flexible power supply system comprises a second DC/AC converter and a second DC/AC converter control unit;
the second DC/AC converter control unit is connected with the central control module through a communication line, receives a control instruction of the central control module, sends a control signal to the second DC/AC converter and controls the direction and the magnitude of the interactive power of the storage battery and the microgrid.
Further, a fourth control module of the bidirectional flexible power supply system comprises a grid-connected switch and a grid-connected switch control unit;
the grid-connected switch control unit is connected with the central control module through a communication line, sends the electric power demand of the residential and civil users to the central control module, receives the control instruction of the central control module, and sends a control signal to the grid-connected switch to control the connection state of the residential and civil user load and the microgrid.
Furthermore, the central control module of the bidirectional flexible power supply system comprises a microgrid power price information acquisition unit, a bidirectional flexible power supply mode judgment unit, a bidirectional flexible power supply scheme calculation unit and a bidirectional flexible power supply control unit;
the microgrid power price information acquisition unit is in communication connection with the microgrid control center, acquires charge and discharge power price information issued by the microgrid control center and transmits the charge and discharge power price information to the bidirectional flexible power supply mode judgment unit;
the bidirectional flexible power supply control unit transmits the received roof photovoltaic power generation power, the residual electric quantity of the storage battery and the electricity utilization power demand of the residential user to the bidirectional flexible power supply mode judging unit;
the bidirectional flexible power supply mode judging unit calculates and determines the power supply modes of residential users and roof photovoltaic;
the bidirectional flexible power supply mode determination unit transmits a power supply mode signal to the bidirectional flexible power supply scheme calculation unit.
Further, the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential user and the roof photovoltaic is a power discharge mode from the roof photovoltaic to the microgrid;
under the mode that roof photovoltaic discharges to the microgrid, the bidirectional flexible power supply scheme computing unit generates a grid-connected switch turn-off control signal; in addition, optimizing to obtain a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal;
and the control signals are respectively sent to the first control module, the second control module, the third control module and the fourth control module through the bidirectional flexible power supply control unit.
Further, the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential users and the roof photovoltaic is a mode of supplying power to the residential users by the micro-grid;
in the mode that the micro-grid supplies power to resident users, the bidirectional flexible power supply scheme calculation unit generates a grid-connected switch conduction control signal, and in addition, a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal are obtained through optimization;
and the control signals are respectively sent to the first control module, the second control module, the third control module and the fourth control module through the bidirectional flexible power supply control unit.
The utility model provides a two-way power supply system of roof photovoltaic and little electric wire netting towards resident's user, first control module includes DC converter and DC converter the control unit, second control module includes first DC AC converter and first DC AC converter the control unit, third control module includes second DC AC converter and second DC AC converter the control unit, fourth control module is including being incorporated into the power networks switch and being incorporated into the power networks switch the control unit, central control module includes little electric wire netting price information acquisition unit, two-way nimble power supply mode decision unit, two-way nimble power supply scheme computational element and two-way nimble power supply the control unit.
A DC/DC converter control unit in the first control module is connected with a bidirectional flexible power supply control unit in the central control module, and sends the power generating power information of the rooftop photovoltaic to the bidirectional flexible power supply control unit; a first DC/AC converter control unit in the second control module is connected with a bidirectional flexible power supply control unit in the central control module, and the bidirectional flexible power supply control unit is used for sending the residual electric quantity information of the storage battery; a second DC/AC converter control unit in the third control module is connected with a bidirectional flexible power supply control unit in the central control module; and a grid-connected switch control unit in the fourth control module is connected with a bidirectional flexible power supply control unit in the central control module, and sends the electricity consumption power demand information of the residential user to the bidirectional flexible power supply control unit.
On the basis, the bidirectional flexible power supply mode judging unit in the central control module calculates and determines the power supply modes of the residential users and the roof photovoltaic according to the received charging and discharging electricity price information, the magnitude of the power generated by the roof photovoltaic, the residual electric quantity of the storage battery and the magnitude of the power demand of the residential users: (1) a roof photovoltaic discharges to a microgrid, (2) the microgrid supplies power to residential users; then, the bidirectional flexible power supply scheme calculating unit respectively optimizes and obtains the bidirectional flexible power supply scheme of the load of the roof photovoltaic to the residential users under the discharging mode of the roof photovoltaic to the microgrid and under the power supply mode of the microgrid to the residential users, and the bidirectional flexible power supply scheme comprises the following steps: the control scheme of the grid-connected switch between the residential user load and the microgrid, the scheme of the storage power from the roof photovoltaic to the storage battery, the scheme of the power supply from the storage battery to the residential user load, the scheme of the power transmission from the storage battery to the microgrid and the scheme of the power supply from the microgrid to the residential user load.
The bidirectional flexible power supply scheme is converted into a control signal through a bidirectional flexible power supply control unit, the control signal is sent to a DC/DC converter control unit in a first control module, and the transmission power of the roof photovoltaic to the storage battery is controlled through controlling the conduction angle of the DC/DC converter; the control signal is sent to a first DC/AC converter control unit in a second control module, and the power supply power of the storage battery to the load of the resident user is controlled by controlling the conduction angle of the first DC/AC converter; the current is sent to a second DC/AC converter control unit in a third control module, and the transmission power of the storage battery to the microgrid is controlled by controlling the conduction angle of the second DC/AC converter; and the power supply state of the micro-grid to the load of the resident user is controlled by controlling the on/off state of the grid-connected switch.
The utility model provides a roof photovoltaic and micro-grid bidirectional power supply system facing to residential users, a central control module can flexibly control the transmission power of the roof photovoltaic to a storage battery, the power supply power of the storage battery to the residential user load and the transmission power of a storage battery to the micro-grid; and the power supply state of the micro-grid to the load of the resident user is controlled through the on/off state of the grid-connected switch.
Compared with the prior art, the utility model provides a roof photovoltaic and little two-way power supply system's of electric wire netting advantage towards resident user:
(1) the system has simple structure and reasonable design.
(2) The power transmission from the roof photovoltaic to the storage battery, the power supply from the storage battery to the load of the resident user and the power transmission from the storage battery to the microgrid can be flexibly controlled.
(3) The power supply state of the micro-grid to the load of the resident user can be flexibly controlled.
(4) The photovoltaic absorption and utilization of the distributed roof are effectively promoted.
Drawings
Fig. 1 is the utility model provides a towards resident user's roof photovoltaic and little two-way power supply system's of electric wire netting system block diagram.
Fig. 2 is the utility model provides a towards resident user's roof photovoltaic and two-way power supply system control principle block diagram of little electric wire netting.
In the figure: the photovoltaic roof module comprises a roof photovoltaic module 1, a first control module 2, a storage battery 3, a second control module 4, a resident user load 5, a third control module 6, a fourth control module 7, a central control module 8, a micro-grid 9 and a micro-grid control center 10.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following embodiments are further described in detail, and the following embodiments are only used for illustrating the present invention, but not for limiting the scope of the present invention.
A residential customer-oriented rooftop photovoltaic and microgrid bi-directional power supply system, comprising: the system comprises a roof photovoltaic assembly, a resident user load, a storage battery, a controller and a micro-grid;
the controller comprises a first control module, a second control module, a third control module, a fourth control module, a central control module and a microgrid control center;
photovoltaic module installs on resident user's roof, and roof photovoltaic module connects on the battery through first control module, and the battery passes through the second control module and links to each other with resident user load, and the battery passes through the third control module and links to each other with little electric wire netting, and resident user load passes through the fourth control module and links to each other with little electric wire netting.
Further, the first control module of the bidirectional flexible power supply system comprises a DC/DC converter and a DC/DC converter control unit;
the control unit of the DC/DC converter is connected with the central control module through a communication line, sends the power generating capacity of the roof photovoltaic to the central control module, receives a control instruction of the central control module, sends a control signal to the DC/DC converter and controls the power transmission capacity of the roof photovoltaic to the storage battery.
Further, the second control module of the bidirectional flexible power supply system comprises a first DC/AC converter and a first DC/AC converter control unit;
the first DC/AC converter control unit is connected with the central control module through a communication line, sends the residual electric quantity of the storage battery to the central control module, receives a control instruction of the central control module, sends a control signal to the first DC/AC converter and controls the power supply power of the storage battery to the load of the resident user.
Further, a third control module of the bidirectional flexible power supply system comprises a second DC/AC converter and a second DC/AC converter control unit;
the second DC/AC converter control unit is connected with the central control module through a communication line, receives a control instruction of the central control module, sends a control signal to the second DC/AC converter and controls the direction and the magnitude of the interactive power of the storage battery and the microgrid.
Further, a fourth control module of the bidirectional flexible power supply system comprises a grid-connected switch and a grid-connected switch control unit;
the grid-connected switch control unit is connected with the central control module through a communication line, sends the electric power demand of the residential and civil users to the central control module, receives the control instruction of the central control module, and sends a control signal to the grid-connected switch to control the connection state of the residential and civil user load and the microgrid.
Furthermore, the central control module of the bidirectional flexible power supply system comprises a microgrid power price information acquisition unit, a bidirectional flexible power supply mode judgment unit, a bidirectional flexible power supply scheme calculation unit and a bidirectional flexible power supply control unit;
the microgrid power price information acquisition unit is in communication connection with the microgrid control center, acquires charge and discharge power price information issued by the microgrid control center and transmits the charge and discharge power price information to the bidirectional flexible power supply mode judgment unit;
the bidirectional flexible power supply control unit transmits the received roof photovoltaic power generation power, the residual electric quantity of the storage battery and the electricity utilization power demand of the residential user to the bidirectional flexible power supply mode judging unit;
the bidirectional flexible power supply mode judging unit calculates and determines the power supply modes of residential users and roof photovoltaic;
the bidirectional flexible power supply mode determination unit transmits a power supply mode signal to the bidirectional flexible power supply scheme calculation unit.
Further, the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential user and the roof photovoltaic is a power discharge mode from the roof photovoltaic to the microgrid;
under the mode that roof photovoltaic discharges to the microgrid, the bidirectional flexible power supply scheme computing unit generates a grid-connected switch turn-off control signal; in addition, optimizing to obtain a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal;
and the control signals are respectively sent to the first control module, the second control module, the third control module and the fourth control module through the bidirectional flexible power supply control unit.
Further, the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential users and the roof photovoltaic is a mode of supplying power to the residential users by the micro-grid;
in the mode that the micro-grid supplies power to resident users, the bidirectional flexible power supply scheme calculation unit generates a grid-connected switch conduction control signal, and in addition, a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal are obtained through optimization;
and the control signals are respectively sent to the first control module, the second control module, the third control module and the fourth control module through the bidirectional flexible power supply control unit.
The utility model provides a two-way power supply system of roof photovoltaic and little electric wire netting towards resident's user, first control module includes DC converter and DC converter the control unit, second control module includes first DC AC converter and first DC AC converter the control unit, third control module includes second DC AC converter and second DC AC converter the control unit, fourth control module is including being incorporated into the power networks switch and being incorporated into the power networks switch the control unit, central control module includes little electric wire netting price information acquisition unit, two-way nimble power supply mode decision unit, two-way nimble power supply scheme computational element and two-way nimble power supply the control unit.
A DC/DC converter control unit in the first control module is connected with a bidirectional flexible power supply control unit in the central control module, and sends the power generating power information of the rooftop photovoltaic to the bidirectional flexible power supply control unit; a first DC/AC converter control unit in the second control module is connected with a bidirectional flexible power supply control unit in the central control module, and the bidirectional flexible power supply control unit is used for sending the residual electric quantity information of the storage battery; a second DC/AC converter control unit in the third control module is connected with a bidirectional flexible power supply control unit in the central control module; and a grid-connected switch control unit in the fourth control module is connected with a bidirectional flexible power supply control unit in the central control module, and sends the electricity consumption power demand information of the residential user to the bidirectional flexible power supply control unit.
Example 1
With reference to fig. 1 and 2, the bidirectional power supply system for residential consumer rooftop photovoltaic and microgrid comprises: the system comprises a roof photovoltaic component 1, a resident user load 5, a storage battery 3, a controller and a microgrid 9; the controller comprises a first control module 2, a second control module 4, a third control module 6, a fourth control module 7 and a central control module 8; photovoltaic module installs on resident user's roof, and roof photovoltaic module 1 is connected on battery 3 through first control module 2, and battery 3 links to each other with resident user load 5 through second control module 4, and battery 3 links to each other with little electric wire netting 9 through third control module 6, and resident user load 5 links to each other with little electric wire netting 9 through fourth control module 7.
Specifically, the central control module 8 obtains a charging control signal from the roof photovoltaic module 1 of the first control module 2 to the storage battery 3, a power supply control signal from the storage battery 3 of the second control module 4 to the residential customer load 5, a power supply control signal from the storage battery 3 of the third control module 6 to the microgrid 9, and a power supply control signal from the microgrid 9 of the fourth control module 7 to the residential customer load 5 by receiving the power generation capacity information of the roof photovoltaic module 1, the remaining power information of the storage battery 3, and the power demand information of the residential customer load 5, which are uploaded by the first control module 2, and by an optimization decision, the central control module 8 obtains. Finally, maximum dissipation of the photovoltaic power generation power of the distributed roof is achieved, and disturbance and interference of photovoltaic power generation power fluctuation to the micro-grid are reduced.
Example 2
As shown in fig. 1 and 2, the first control module includes a DC/DC converter and a DC/DC converter control unit, the second control module includes a first DC/AC converter and a first DC/AC converter control unit, the third control module includes a second DC/AC converter and a second DC/AC converter control unit, the fourth control module includes a grid-connected switch and a grid-connected switch control unit, and the central control module includes a bidirectional flexible power supply scheme calculation unit and a bidirectional flexible power supply control unit;
specifically, a DC/DC converter control unit in a first control module is connected with a bidirectional flexible power supply control unit in a central control module, and sends power generation power information of roof photovoltaic to the bidirectional flexible power supply control unit; a first DC/AC converter control unit in the second control module is connected with a bidirectional flexible power supply control unit in the central control module, and the bidirectional flexible power supply control unit is used for sending the residual electric quantity information of the storage battery; a second DC/AC converter control unit in the third control module is connected with a bidirectional flexible power supply control unit in the central control module; and a grid-connected switch control unit in the fourth control module is connected with a bidirectional flexible power supply control unit in the central control module, and sends the electricity consumption power demand information of the residential user to the bidirectional flexible power supply control unit. On the basis, the bidirectional flexible power supply mode judging unit in the central control module calculates and determines the power supply modes of the residential users and the roof photovoltaic according to the received charging and discharging electricity price information, the magnitude of the power generated by the roof photovoltaic, the residual electric quantity of the storage battery and the magnitude of the power demand of the residential users: (1) a roof photovoltaic discharges to a microgrid, (2) the microgrid supplies power to residential users; then, the bidirectional flexible power supply scheme calculating unit respectively optimizes and obtains the bidirectional flexible power supply scheme of the load of the roof photovoltaic to the residential users under the discharging mode of the roof photovoltaic to the microgrid and under the power supply mode of the microgrid to the residential users, and the bidirectional flexible power supply scheme comprises the following steps: the control scheme of the grid-connected switch between the residential user load and the microgrid, the scheme of the storage power from the roof photovoltaic to the storage battery, the scheme of the power supply from the storage battery to the residential user load, the scheme of the power transmission from the storage battery to the microgrid and the scheme of the power supply from the microgrid to the residential user load. The bidirectional flexible power supply scheme is converted into a control signal through a bidirectional flexible power supply control unit, the control signal is sent to a DC/DC converter control unit in a first control module, and the transmission power of the roof photovoltaic to the storage battery is controlled through controlling the conduction angle of the DC/DC converter; the control signal is sent to a first DC/AC converter control unit in a second control module, and the power supply power of the storage battery to the load of the resident user is controlled by controlling the conduction angle of the first DC/AC converter; the current is sent to a second DC/AC converter control unit in a third control module, and the transmission power of the storage battery to the microgrid is controlled by controlling the conduction angle of the second DC/AC converter; and the power supply state of the micro-grid to the load of the resident user is controlled by controlling the on/off state of the grid-connected switch.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention, and can be right to perform various changes to the technical solution of the present invention, and these simple changes all belong to the protection scope of the present invention.
It should be noted that the various technical features and steps described in the above embodiments can be combined in any suitable manner without contradiction, and the present invention does not need to describe any combination of the features and steps in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (4)
1. A residential user-oriented roof photovoltaic and microgrid bidirectional power supply system, comprising: the system comprises a roof photovoltaic assembly, a resident user load, a storage battery, a controller and a micro-grid;
the controller comprises a first control module, a second control module, a third control module, a fourth control module, a central control module and a microgrid control center;
the photovoltaic module is arranged on the roof of a resident user, the roof photovoltaic module is connected to the storage battery through the first control module, the storage battery is connected with the load of the resident user through the second control module, the storage battery is connected with the micro-grid through the third control module, and the load of the resident user is connected with the micro-grid through the fourth control module;
the first control module comprises a DC/DC converter and a DC/DC converter control unit;
the control unit of the DC/DC converter is connected with the central control module through a communication line, sends the power generating capacity of the roof photovoltaic to the central control module, receives a control instruction of the central control module, sends a control signal to the DC/DC converter and controls the power transmission capacity of the roof photovoltaic to the storage battery;
the central control module comprises a microgrid power price information acquisition unit, a bidirectional flexible power supply mode judgment unit, a bidirectional flexible power supply scheme calculation unit and a bidirectional flexible power supply control unit;
the microgrid power price information acquisition unit is in communication connection with the microgrid control center, acquires charge and discharge power price information issued by the microgrid control center and transmits the charge and discharge power price information to the bidirectional flexible power supply mode judgment unit;
the bidirectional flexible power supply control unit transmits the received roof photovoltaic power generation power, the residual electric quantity of the storage battery and the electricity utilization power demand of the residential user to the bidirectional flexible power supply mode judging unit;
the bidirectional flexible power supply mode judging unit calculates and determines the power supply modes of residential users and roof photovoltaic;
the bidirectional flexible power supply mode judging unit transmits a power supply mode signal to the bidirectional flexible power supply scheme calculating unit;
the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential user and the roof photovoltaic is a discharge mode from the roof photovoltaic to the microgrid;
under the mode that roof photovoltaic discharges to the microgrid, the bidirectional flexible power supply scheme computing unit generates a grid-connected switch turn-off control signal; in addition, optimizing to obtain a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal;
the control signals are respectively sent to a first control module, a second control module, a third control module and a fourth control module through a bidirectional flexible power supply control unit;
the bidirectional flexible power supply mode judging unit calculates and determines that the power supply mode of the residential users and the roof photovoltaic is a mode of supplying power to the residential users by the micro-grid;
in the mode that the micro-grid supplies power to resident users, the bidirectional flexible power supply scheme calculation unit generates a grid-connected switch conduction control signal, and in addition, a DC/DC converter control signal, a first DC/AC converter control signal and a second DC/AC converter control signal are obtained through optimization;
and the control signals are respectively sent to the first control module, the second control module, the third control module and the fourth control module through the bidirectional flexible power supply control unit.
2. The residential consumer oriented rooftop photovoltaic and microgrid bi-directional power supply system of claim 1, characterized in that: the second control module comprises a first DC/AC converter and a first DC/AC converter control unit;
the first DC/AC converter control unit is connected with the central control module through a communication line, sends the residual electric quantity of the storage battery to the central control module, receives a control instruction of the central control module, sends a control signal to the first DC/AC converter and controls the power supply power of the storage battery to the load of the resident user.
3. The residential consumer oriented rooftop photovoltaic and microgrid bi-directional power supply system of claim 1, characterized in that: the third control module comprises a second DC/AC converter and a second DC/AC converter control unit;
the second DC/AC converter control unit is connected with the central control module through a communication line, receives a control instruction of the central control module, sends a control signal to the second DC/AC converter and controls the direction and the magnitude of the interactive power of the storage battery and the microgrid.
4. The residential consumer oriented rooftop photovoltaic and microgrid bi-directional power supply system of claim 1, characterized in that: the fourth control module comprises a grid-connected switch and a grid-connected switch control unit;
the grid-connected switch control unit is connected with the central control module through a communication line, sends the electric power demand of the residential and civil users to the central control module, receives the control instruction of the central control module, and sends a control signal to the grid-connected switch to control the connection state of the residential and civil user load and the microgrid.
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| CN114520512A (en) * | 2022-04-21 | 2022-05-20 | 广东润世华智慧能源科技发展有限公司 | Roof distributed photovoltaic power generation intelligent energy storage management system |
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