CN221448101U - New energy micro-grid power station operation system - Google Patents
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Abstract
The utility model discloses a new energy micro-grid power station operation system, which comprises a power generation module, an energy storage module and a control module; the power generation module comprises a diesel power generation system and a photovoltaic power generation system for providing electric power for the load, and a wind power generation system for providing electric power for the diesel power generation system and the control module; the energy storage module is respectively and electrically connected with the commercial power, the diesel power generation system, the photovoltaic power generation system and the electric load and is used for converting electric power energy provided by the commercial power, the diesel power generation system and the photovoltaic power generation system into direct current for storage and converting the direct current into alternating current according to control instructions to supply power for the electric load; the control module comprises a diesel generation and commercial power switching control system for controlling the switching of the commercial power supply and the diesel generation system to supply power respectively, and the input end of the diesel generation and commercial power switching control system is electrically connected with the electric energy output ends of the commercial power and the diesel generation system respectively.
Description
Technical Field
The utility model relates to a new energy micro-grid power station operation system.
Background
Under the large background of double carbon, the ratio of renewable energy sources such as solar energy, wind power generation and the like is gradually increased, and the distributed power supply has the advantages of small investment, environmental protection, high flexibility and the like, and the development scale is rapidly enlarged. However, the randomness and volatility of the distributed power supply are uncontrollable, and large-scale application and access also bring about great challenges and impacts to the traditional power grid.
The micro-grid is a small power generation and distribution system composed of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitoring and protecting device and the like. The micro-grid realizes the grid connection problem of flexibility, large quantity and diversity of the distributed power supply. The method realizes reliable supply of various energy forms of loads, is an effective mode of the active power distribution network, and enables the traditional power grid to be transited to the intelligent power grid.
The invention patent number 202210533975.5 discloses a complementary power supply system consisting of a photovoltaic power generation system, an energy storage system and a diesel generator system, which comprises a control unit, wherein the control unit is electrically connected with the photovoltaic power generation system and the wind power generation system through an inversion control module, and the input end of the control unit is connected with the output end of the generator power supply unit. According to the invention, the power regulation and control unit automatically regulates the photovoltaic power generation power, the wind power generation power and the generator power generation power according to the current load demand, the intelligent complementary power supply purpose of photovoltaic power generation, wind power generation and generator set power generation is realized, meanwhile, the threshold value is improved by utilizing a simplified PCNN model, so that an algorithm suitable for data noise reduction is obtained, noise in signals is effectively filtered, characteristic information of the data can be reserved, and compared with wavelet noise reduction, the method has larger signal-to-noise ratio and smaller mean square error, and erroneous evaluation and fault judgment on a power supply mode are avoided.
The photovoltaic power generation system, the wind power generation system, the energy storage module and the diesel generator system are used for supplying power to a load; however, in the actual running process, because the wind power generation has extremely strong instability, and the power generated by the wind power generation system of the micro-grid power station is often not high, the practical significance of directly connecting the electric energy generated by the wind power generation system into the micro-grid to supply power for the load with larger power is not great.
Disclosure of utility model
The utility model aims to provide a new energy micro-grid power station operation system, which aims to solve the problem that the existing micro-grid power station does not effectively utilize the electric energy generated by the wind power generation system because the wind power generation has extremely strong instability and the power generation power of the wind power generation system of the micro-grid power station is not high.
In order to solve the technical problems, the utility model provides a new energy micro-grid power station operation system which comprises a power generation module, an energy storage module and a control module; the power generation module comprises a diesel power generation system and a photovoltaic power generation system for providing electric power for the load, and a wind power generation system for providing electric power for the diesel power generation system and the control module; the energy storage module is respectively and electrically connected with the commercial power, the diesel power generation system, the photovoltaic power generation system and the electric load and is used for converting electric power energy provided by the commercial power, the diesel power generation system and the photovoltaic power generation system into direct current for storage and converting the direct current into alternating current according to control instructions to supply power for the electric load; the control module comprises a diesel generation and commercial power switching control system for controlling and switching the commercial power supply and the diesel generation system, and the input end of the diesel generation and commercial power switching control system is respectively and electrically connected with the electric energy output ends of the commercial power and the diesel generation system.
The micro-grid power station operation system supplies power according to the priority sequence of the photovoltaic power generation system, the commercial power, the energy storage module and the diesel power generation system in the operation process, so that the photovoltaic new energy is utilized to the maximum extent, the use of the traditional energy of the diesel power generation set is reduced, higher economic benefit is generated, and environmental pollution is reduced. The output electric energy of the wind power generation system of the micro-grid power station is used for charging the starting storage battery, and the electric energy of the wind power generation system is used as the electric energy of the diesel power generation system with low power consumption and the control module, so that the output electric energy of the power generation module of the micro-grid power station can be more reasonably distributed and utilized, and the maximum utilization of new energy is realized.
Further, the diesel power generation system comprises a diesel generator set, a starting storage battery and a diesel control system; the electric energy output end of the diesel generating set is electrically connected with the electric energy input end of the diesel generating and commercial power switching control system; the electric energy input end of the starting storage battery is electrically connected with the output end of the wind power generation system, and the electric energy output end of the starting storage battery is electrically connected with the diesel generator set and the diesel generation control system respectively. The diesel power generation system can be used as a backup power source, and can be used as the last power guarantee equipment of the micro-grid power station system to provide power energy when the photovoltaic module and the like cannot normally work to output electric energy, and the configuration capacity of the diesel power generation system needs to meet the power load capacity to output alternating current power.
Further, the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic inverter is used for converting electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module. The photovoltaic power generation system can be used as a priority power supply main body, and the commercial power, the energy storage system and the diesel power generation system are used for supplying power only when the photovoltaic power generation output cannot meet the use requirement, so that the photovoltaic new energy is utilized to the maximum extent, the pollution is reduced, and the resources are saved.
Further, the energy storage module comprises an energy storage battery, a hybrid inverter and an anti-reflux module; the electric energy generated by the power generation module is converted into direct current by the hybrid inverter after passing through the anti-backflow module to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current by the hybrid inverter and then is supplied to the electric load by the anti-backflow module. The hybrid inverter mainly realizes the mutual inversion conversion of direct current and alternating current. The anti-backflow module is mainly used for enabling the electric energy of the energy storage battery to be only supplied to local loads for use, and preventing the redundant electric energy from being sent into a power grid, so that the problems of influencing the service life and the performance of the battery, damaging power grid equipment, fluctuation of power grid voltage, unstable power grid frequency and the like are caused.
Further, the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic inverter is used for converting electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module; the energy storage module comprises an energy storage battery and a hybrid inverter which is respectively and electrically connected with the energy storage battery and the power generation module; the electric energy generated by the power generation module is converted into direct current through the hybrid inverter to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current through the hybrid inverter to supply power to the power utilization load; the photovoltaic inverter and the hybrid inverter are respectively connected with the photovoltaic module through a change-over switch; when the micro-grid power station is connected with the mains supply, the change-over switch is switched to the photovoltaic inverter; when no mains supply is connected, the change-over switch is switched to the hybrid inverter. Through setting up change over switch, when no mains supply is connected, directly connect into hybrid inverter with the photovoltaic output, reducible energy conversion loss improves energy utilization.
Further, the wind power generation system comprises a wind power generator set and a wind power controller for converting output electric energy of the wind power generator set into direct current to charge a starting storage battery of the diesel power generator set.
Further, the control module also comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system and the diesel generation system through signals. The existing EMS energy management system is adopted to control the diesel generation and commercial power switching control system and the diesel generation system, so that automatic control can be conveniently realized.
Further, the control module also comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system, the diesel generation system, the photovoltaic inverter, the hybrid inverter and the change-over switch through signals. The existing EMS energy management system is adopted to control the diesel generation and commercial power switching control system and the diesel power generation system, intelligent power distribution of the micro-grid power station can be conveniently realized, new energy sources such as photovoltaic and the like are utilized to the maximum extent, the use of traditional energy sources of the diesel generator set is reduced, higher economic benefits are generated, and environmental pollution is reduced.
Further, the EMS energy management system is electrically connected with the starting storage battery, and the starting storage battery in the diesel power generation system is used for supplying power to the EMS energy management system.
The beneficial effects of the utility model are as follows: the output electric energy of the wind power generation system of the micro-grid power station is used for charging the starting storage battery, and the electric energy of the wind power generation system is used as the electric energy of the diesel power generation system with low power consumption and the control module, so that the output electric energy of the power generation module of the micro-grid power station can be more reasonably distributed and utilized, and the maximum utilization of new energy is realized.
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The accompanying drawings, in which like reference numerals refer to identical or similar parts throughout the several views and which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application unduly. In the drawings:
fig. 1 is a schematic structural view of an embodiment of the present utility model.
Detailed Description
The new energy micro-grid power station operation system shown in fig. 1 comprises a power generation module, an energy storage module and a control module; the power generation module comprises a diesel power generation system and a photovoltaic power generation system for providing electric power for the load, and a wind power generation system for providing electric power for the diesel power generation system and the control module; the energy storage module is respectively and electrically connected with the commercial power, the diesel power generation system, the photovoltaic power generation system and the electric load and is used for converting electric power energy provided by the commercial power, the diesel power generation system and the photovoltaic power generation system into direct current for storage and converting the direct current into alternating current according to control instructions to supply power for the electric load; the control module comprises a diesel generation and commercial power switching control system for controlling and switching the commercial power supply and the diesel generation system, and the input end of the diesel generation and commercial power switching control system is respectively and electrically connected with the electric energy output ends of the commercial power and the diesel generation system.
The micro-grid power station operation system supplies power according to the priority sequence of the photovoltaic power generation system, the commercial power, the energy storage module and the diesel power generation system in the operation process, so that the photovoltaic new energy is utilized to the maximum extent, the use of the traditional energy of the diesel power generation set is reduced, higher economic benefit is generated, and environmental pollution is reduced. The output electric energy of the wind power generation system of the micro-grid power station is used for charging the starting storage battery, and the electric energy of the wind power generation system is used as the electric energy of the diesel power generation system with low power consumption and the control module, so that the output electric energy of the power generation module of the micro-grid power station can be more reasonably distributed and utilized, and the maximum utilization of new energy is realized.
According to one embodiment of the application, a diesel power generation system includes a diesel generator set, a start-up battery, and a diesel control system; the electric energy output end of the diesel generating set is electrically connected with the electric energy input end of the diesel generating and commercial power switching control system; the electric energy input end of the starting storage battery is electrically connected with the output end of the wind power generation system, and the electric energy output end of the starting storage battery is electrically connected with the diesel generator set and the diesel generation control system respectively. The diesel power generation system can be used as a backup power source, and can be used as the last power guarantee equipment of the micro-grid power station system to provide power energy when the photovoltaic module and the like cannot normally work to output electric energy, and the configuration capacity of the diesel power generation system needs to meet the power load capacity to output alternating current power.
According to one embodiment of the application, a photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter for converting electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module. The photovoltaic power generation system can be used as a priority power supply main body, and the commercial power, the energy storage system and the diesel power generation system are used for supplying power only when the photovoltaic power generation output cannot meet the use requirement, so that the photovoltaic new energy is utilized to the maximum extent, the pollution is reduced, and the resources are saved.
According to one embodiment of the application, an energy storage module comprises an energy storage battery, a hybrid inverter and an anti-reflux module; the electric energy generated by the power generation module is converted into direct current by the hybrid inverter after passing through the anti-backflow module to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current by the hybrid inverter and then is supplied to the electric load by the anti-backflow module. The hybrid inverter mainly realizes the mutual inversion conversion of direct current and alternating current. The anti-backflow module is mainly used for enabling the electric energy of the energy storage battery to be only supplied to local loads for use, and preventing the redundant electric energy from being sent into a power grid, so that the problems of influencing the service life and the performance of the battery, damaging power grid equipment, fluctuation of power grid voltage, unstable power grid frequency and the like are caused.
According to one embodiment of the application, a photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic inverter is used for converting electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module; the energy storage module comprises an energy storage battery and a hybrid inverter which is respectively and electrically connected with the energy storage battery and the power generation module; the electric energy generated by the power generation module is converted into direct current through the hybrid inverter to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current through the hybrid inverter to supply power to the power utilization load; the photovoltaic inverter and the hybrid inverter are respectively connected with the photovoltaic module through a change-over switch; when the micro-grid power station is connected with the mains supply, the change-over switch is switched to the photovoltaic inverter; when no mains supply is connected, the change-over switch is switched to the hybrid inverter. Through setting up change over switch, when no mains supply is connected, directly connect into hybrid inverter with the photovoltaic output, reducible energy conversion loss improves energy utilization.
According to one embodiment of the application, a wind power generation system comprises a wind power generator set and a wind power controller for converting output electric energy of the wind power generator set into direct current to charge a starting storage battery of a diesel power generator set.
According to one embodiment of the application, the control module further comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system and the diesel generation system through signals. The existing EMS energy management system is adopted to control the diesel generation and commercial power switching control system and the diesel generation system, so that automatic control can be conveniently realized.
According to one embodiment of the application, the control module further comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system, the diesel generation system, the photovoltaic inverter, the hybrid inverter and the change-over switch through signals. The existing EMS energy management system is adopted to control the diesel generation and commercial power switching control system and the diesel power generation system, intelligent power distribution of the micro-grid power station can be conveniently realized, new energy sources such as photovoltaic and the like are utilized to the maximum extent, the use of traditional energy sources of the diesel generator set is reduced, higher economic benefits are generated, and environmental pollution is reduced.
According to one embodiment of the application, the EMS energy management system is electrically connected with the starting storage battery, and the starting storage battery in the diesel power generation system is used for supplying power to the EMS energy management system.
The operation mode of an operation system which can be adopted by the micro-grid power station is as follows:
Under the state of commercial power: the diesel generation and mains supply switching control system is controlled to be switched into a mains supply state, and the energy storage system operates in a spontaneous self-use mode; at the moment, if the output power of the photovoltaic module is sufficient, the change-over switch is controlled to be switched to the photovoltaic inverter, and the system is powered by the photovoltaic power generation system preferentially; if the output power of the photovoltaic module is insufficient, the change-over switch is controlled to be switched to the hybrid inverter, and the energy storage battery is used for supplying power; if the output power of the photovoltaic module and the power supply capacity of the energy storage battery are insufficient, power is supplied through the mains supply.
When the mains supply is suddenly disconnected: the control system for switching the diesel engine and the mains supply keeps the mains supply state, the energy storage module operates in a battery priority mode, the energy storage battery discharges to supply power to important loads of the system, the important load power is kept uninterrupted, and the power supply to the general loads is stopped; meanwhile, the change-over switch is controlled to be switched to the hybrid inverter, direct current of the photovoltaic module is connected to the hybrid inverter for direct current coupling, and alternating current is output after inversion; when the output power of the photovoltaic module is larger than the power consumption power of the power consumption load (the power consumption load comprises important load power supply and general load, the division of the important load and the general load can be set according to the needs of a user), the redundant power charges an energy storage battery, and the hybrid inverter limits the photovoltaic output after the energy storage battery is full; when the output power of the photovoltaic module is smaller than the power consumption power of the power consumption load, the photovoltaic module and the energy storage battery supply power together until the commercial power is recovered or the electric quantity of the energy storage battery is lower than the limit value.
When no commercial power is continuously supplied and the electric quantity of the energy storage battery is lower than the limit value: the diesel generation and commercial power switching control system is controlled to be switched into a diesel generation state; starting a diesel power generation system, and after the load stably operates, re-feeding the energy storage module, wherein the diesel power generation system charges an energy storage battery; the change-over switch is switched to the photovoltaic inverter, the photovoltaic module outputs the maximum power by using the voltage source provided by the diesel power generation system to provide electric energy, the output power of the diesel power generation system is gradually reduced to the lowest running power (for example, 10 percent of the rated power of the diesel power generation system is set) along with the increase of the output power of the photovoltaic module until the electricity consumption of the electricity consumption load is mainly born by the power generation of the photovoltaic module; when the electric quantity of the energy storage battery reaches the upper limit value of charging, if the commercial power is not recovered, the diesel power generation is shut down and the photovoltaic inverter is switched according to the power load condition; such as: when the power load is smaller than a set value (the set output power limit value of the hybrid inverter), the diesel generator set is shut down, and the energy storage module supplies power; when the power load is larger than a set value (the output power limit value of the hybrid inverter), the diesel power generation system is maintained to operate at the lowest operating power according to the output power condition of the photovoltaic module. And returning the system to the state of the commercial power until the commercial power is recovered.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (8)
1. The new energy micro-grid power station operation system is characterized by comprising a power generation module, an energy storage module and a control module;
The power generation module comprises a diesel power generation system and a photovoltaic power generation system for providing electric power energy for a load, and a wind power generation system for providing electric power energy for the diesel power generation system and the control module;
the energy storage module is respectively and electrically connected with the commercial power, the diesel power generation system, the photovoltaic power generation system and the electric load, and is used for converting electric power energy provided by the commercial power, the diesel power generation system and the photovoltaic power generation system into direct current for storage and converting the direct current into alternating current according to a control instruction to supply power for the electric load;
The control module comprises a diesel generation and commercial power switching control system for controlling the switching of the commercial power supply and the diesel generation system, and the input end of the diesel generation and commercial power switching control system is electrically connected with the electric energy output ends of the commercial power and the diesel generation system respectively.
2. The new energy microgrid power station operation system according to claim 1, wherein said diesel power generation system comprises a diesel generator set, a start-up battery and a diesel control system; the electric energy output end of the diesel generating set is electrically connected with the electric energy input end of the diesel generating and commercial power switching control system; the electric energy input end of the starting storage battery is electrically connected with the output end of the wind power generation system, and the electric energy output end of the starting storage battery is electrically connected with the diesel generator set and the diesel generation control system respectively.
3. The new energy microgrid power station operation system according to claim 1, wherein the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter for converting the electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module.
4. The new energy microgrid power station operation system according to claim 1, wherein said energy storage module comprises an energy storage battery, a hybrid inverter and an anti-reflux module; the electric energy generated by the power generation module is converted into direct current by the hybrid inverter after passing through the anti-countercurrent module to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current by the hybrid inverter and then is supplied to the power load by the anti-countercurrent module.
5. The new energy microgrid power station operation system according to claim 1, wherein the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic inverter is used for converting electric energy output by the photovoltaic module into alternating current and then supplying power to an electric load or charging an energy storage module; the energy storage module comprises an energy storage battery and a hybrid inverter which is respectively and electrically connected with the energy storage battery and the power generation module; the electric energy generated by the power generation module is converted into direct current through the hybrid inverter to charge the energy storage battery, and the electric energy of the energy storage battery is converted into alternating current through the hybrid inverter to supply power to the power utilization load; the photovoltaic inverter and the hybrid inverter are respectively connected with the photovoltaic module through a change-over switch; when the micro-grid power station is connected with the mains supply, the change-over switch is switched to the photovoltaic inverter; when no mains supply is connected, the change-over switch is switched to the hybrid inverter.
6. The new energy microgrid power station operation system according to claim 2, wherein the wind power generation system comprises a wind power generator set and a wind power controller for converting output electric energy of the wind power generator set into direct current to charge a starting storage battery of the diesel power generator set.
7. The new energy microgrid power station operation system according to claim 1, wherein said control module further comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system and the diesel generation system through signals.
8. The new energy microgrid power station operation system according to claim 5, wherein said control module further comprises an EMS energy management system; the EMS energy management system is respectively connected with the diesel generation and commercial power switching control system, the diesel generation system, the photovoltaic inverter, the hybrid inverter and the change-over switch through signals.
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| CN202322510054.XU CN221448101U (en) | 2023-09-14 | 2023-09-14 | New energy micro-grid power station operation system |
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| CN202322510054.XU CN221448101U (en) | 2023-09-14 | 2023-09-14 | New energy micro-grid power station operation system |
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