CN211018290U - Coupling energy supply system for gas triple supply and wind-solar storage complementary power generation - Google Patents
Coupling energy supply system for gas triple supply and wind-solar storage complementary power generation Download PDFInfo
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- CN211018290U CN211018290U CN201921890083.0U CN201921890083U CN211018290U CN 211018290 U CN211018290 U CN 211018290U CN 201921890083 U CN201921890083 U CN 201921890083U CN 211018290 U CN211018290 U CN 211018290U
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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
- 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
- Y02B10/30—Wind power
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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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
A coupling energy supply system for complementary power generation of gas triple and wind-solar energy storage is used for providing cold and heat loads and electric loads for buildings, and comprises: the gas triple co-generation subsystem comprises a gas generator set, a generator control module and a waste heat direct-combustion set; the distributed photovoltaic power generation subsystem comprises a photovoltaic component and a photovoltaic inverter, and the wind power generation subsystem comprises a wind power generator set, a rectifier, a direct current combiner box, a voltage clamping storage battery and a wind power inverter which are electrically connected in sequence; the storage battery energy storage subsystem comprises a storage battery pack, an energy storage converter and an energy storage control module; the energy storage control module is used for controlling the operation mode of the coupling energy supply system and setting the energy supply output modes of the gas triple co-generation subsystem, the distributed photovoltaic power generation system, the wind power generation subsystem and the storage battery energy storage subsystem. The utility model discloses effectively guaranteed cold, heat load and electric load supply stability, also improved the reliability and the security that supply the system simultaneously.
Description
Technical Field
The utility model relates to a microgrid power supply field, concretely relates to coupling energy supply system that complementary electricity generation was stored up with scene to gas trigeminy supply.
Background
The gas triple co-generation system is a distributed energy supply system consisting of a gas generator (or an internal combustion engine), a waste heat boiler and a waste heat water cooling and heating unit. Compared with a simple direct combustion mode, the gas triple co-generation system firstly utilizes a gas turbine or a gas internal combustion engine to drive a generator to generate power, and then utilizes the waste heat after power generation to supply heat for a building or serve as the power for air conditioning refrigeration to supply cold for the building, so that the stepped utilization of primary energy can be realized, and the utilization value of fuel is improved.
At present, in a conventional gas triple co-generation system, a gas generator generally adopts two system modes of direct grid-connected operation with commercial power or isolated grid independent operation. When the system adopts a grid-connected operation mode, the gas generator can keep a PQ (constant power) output mode, and can provide power supply for the triple-generation system and the building while meeting the heat supply or cold supply load of the building, and the part of the generated energy exceeding the requirement of the building can be returned to a mains supply power grid, namely 'self-generation and self-use and surplus power on-line'.
However, when the conventional gas triple co-generation system adopts an isolated network operation mode, due to the lack of an energy storage link, the gas generator must operate in a V/f (namely, constant-voltage constant-frequency) output mode, so that the stability of the whole off-network system can be ensured. In practical application, it can be found that when the demand of the heating load or the cooling load of the gas triple co-generation system is low (such as at night of an office building), the power supply load of the gas triple co-generation system cannot reach the lowest continuous operation load allowed by the V/f output mode of the generator, so that the gas generator cannot be normally put into operation, or the gas generator cannot quickly respond to the instantaneous fluctuation of the power supply load after being put into operation, so that the power system must be switched back to the commercial power supply mode, and if the commercial power fails, the gas generator cannot play a role of a standby power supply. Therefore, when the conventional gas triple co-generation system operates in an isolated network, particularly in a transition season, the problems of frequent startup, short-time system power failure and the like can be encountered, the system operation difficulty is high, and the efficiency and the power supply safety of the generator are low.
SUMMERY OF THE UTILITY MODEL
The problem in the prior art is solved, namely the technical problems that when a conventional gas triple co-generation system operates in an isolated grid, a gas generator cannot be normally started when the load of a micro-grid is low and cannot completely and independently respond to instantaneous fluctuation of the load of the micro-grid are solved.
The utility model provides a coupling energy supply system of complementary electricity generation is stored up with scene to gas trigeminy for provide cold, heat load and electric load for the building, it includes:
the gas triple co-generation subsystem comprises a gas generator set, a generator control module and a waste heat direct-combustion set; the gas generator set and the waste heat direct-fired unit are correspondingly arranged to provide cold and heat loads and an electric load for the building, and the generator control module is used for controlling the power generation regulation and energy supply output modes of the gas generator set;
the distributed photovoltaic power generation subsystem comprises a photovoltaic component and a photovoltaic inverter, wherein the photovoltaic component is installed at the position, facing the sun, of the building, and the photovoltaic inverter is electrically connected with the photovoltaic component and used for converting direct current generated by the photovoltaic component into alternating current, providing an electric load for the building and controlling an energy supply output mode of the distributed photovoltaic power generation subsystem;
the wind power generation subsystem comprises a wind power generator set, a rectifier, a direct current combiner box, a voltage clamping storage battery and a wind power inverter which are electrically connected in sequence; the alternating current generated by the wind generating set is converted into stable direct current through the rectifier, the direct current is converged through the direct current convergence box and then charges the voltage clamping storage battery, and the direct current output by the voltage clamping storage battery is converted into alternating current through the wind power inverter and is connected with the distributed photovoltaic power generation subsystem in a grid mode to provide electric load for the building; the wind power inverter is also used for controlling an energy supply output mode of the wind power generation subsystem;
the storage battery energy storage subsystem comprises a storage battery pack, an energy storage converter and an energy storage control module; the energy storage converter is electrically connected with the storage battery pack and used for converting direct current output by the storage battery pack into alternating current and providing electric load for the building, and the energy storage control module is used for controlling the operation mode of the coupling energy supply system and controlling the generator control module, the photovoltaic inverter, the wind power inverter and the storage battery pack so as to set energy supply output modes of the gas triple co-generation subsystem, the distributed photovoltaic power generation system, the wind power generation subsystem and the storage battery energy storage subsystem;
the operation mode comprises a grid-connected operation mode and an isolated grid operation mode, and the energy supply output mode comprises a constant power output mode and a constant voltage and constant frequency output mode.
Further, the gas triple co-generation subsystem further comprises a cylinder liner water system plate heat exchanger and a remote heat dissipation water tank; the primary side of the cylinder liner water system plate type heat exchanger is respectively communicated with the gas generator set and the remote heat dissipation water tank, and the primary side of the cylinder liner water system plate type heat exchanger is also provided with a bypass valve.
Furthermore, the gas generator set is connected with the waste heat direct-fired unit through a flue, a three-way valve is arranged on the flue, and one end of the three-way valve is communicated with a bypass flue communicated to the outside.
Furthermore, the gas triple co-generation subsystem and the storage battery energy storage subsystem are connected to the same bus of the power supply and distribution system of the building.
Furthermore, the photovoltaic modules comprise a standard polycrystalline silicon photovoltaic module, a standard thin film photovoltaic module and a flexible thin film photovoltaic module, and the standard polycrystalline silicon photovoltaic module, the standard thin film photovoltaic module and the flexible thin film photovoltaic module respectively correspond to one photovoltaic inverter.
The output end of the isolation transformer is connected with the output end of the photovoltaic inverter corresponding to the standard polycrystalline silicon photovoltaic component in parallel.
Further, the output end of the wind power inverter is connected with the output end of the photovoltaic inverter in parallel.
The output end of the isolation transformer, the output end of the wind power inverter and the output end of the photovoltaic inverter are electrically connected with the input end of the alternating current convergence cabinet, and the output end of the alternating current convergence cabinet is connected with a bus of a power supply and distribution system of a building.
Further, the gas generator set comprises a gas internal combustion generator, and/or the waste heat direct-combustion set comprises a smoke hot water type waste heat direct-combustion engine, and/or the wind generator set comprises an S-shaped vertical axis wind turbine, and/or the storage battery set comprises a lithium iron phosphate storage battery.
Furthermore, the energy storage control module is used as a main control unit of the coupling energy supply system, the generator control module, the photovoltaic inverter, the wind power inverter and the storage battery pack are used as slave control units of the coupling energy supply system, and the slave control units are in communication connection with the main control unit.
The utility model has the advantages that:
the utility model discloses combine gas trigeminy confession subsystem, distributed photovoltaic power generation subsystem, wind power generation subsystem and battery energy storage subsystem to form little grid system together, provide cold, heat load and electric load for the building. The characteristic of flexible switching of the storage battery energy storage subsystem is fully utilized, the defect of the dynamic response capability of the gas generator in the isolated network operation mode is effectively overcome, the full generation hours of the gas generator are prolonged, the stability of cold and heat load supply is ensured, the reliability and the safety of a system are improved, and the coupled operation mode of triple co-generation, distributed energy and energy storage is realized.
Furthermore, by adopting the high-performance photovoltaic module and the wind generating set, renewable energy is utilized to the maximum extent, and the utilization rate of the renewable energy is improved. Compared with the conventional mode of 'commercial power + direct-fired machine', under the condition of isolated network operation of the gas generator, the comprehensive utilization rate of system energy can be improved by 30-35%, and the energy saving rate of the system can reach 15-18%.
Drawings
Fig. 1 is a schematic main structural diagram of a coupling energy supply system for gas triple supply and wind-solar hybrid power generation in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a coupling energy supply system for gas triple supply and wind-solar hybrid power generation in an embodiment of the present invention.
Fig. 3 is a flow chart of the operation strategy of the present invention in the heating season.
Fig. 4 is a flow chart of the operation strategy of the present invention in the cooling season.
Fig. 5 is a flow chart of the operating strategy of the present invention in the transition season.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The utility model provides a coupling energy supply system of complementary electricity generation is stored up with scene to gas trigeminy, on the basis of conventional gas trigeminy confession system, increase two kinds of distributed energy utilization forms of solar photovoltaic power generation and wind power generation, utilize energy storage system to charge when the price of electricity valley was put at night simultaneously, discharge during the price of electricity peak value daytime, cooperation gas generator steady operation better compensates gas generator not enough on the flexibility, improves renewable energy utilization ratio.
Referring to fig. 1, fig. 1 illustrates a main structure of a coupled energy supply system for gas triple power supply and wind-solar-energy storage complementary power generation, as shown in fig. 1, the coupled energy supply system for gas triple power supply and wind-solar-energy storage complementary power generation is used for supplying cold and heat loads and electric loads to a building, and other energy supply modes of the building are mains supply which supplies power to the building after passing through a power transformation and distribution device. The coupling energy supply system comprises a gas triple co-generation subsystem 100, a distributed photovoltaic power generation subsystem 200, a wind power generation subsystem 300 and a storage battery energy storage subsystem 400.
The gas triple co-generation subsystem 100 comprises a gas generator set 11, a generator control module 52 and a waste heat direct-combustion set 12. The gas generator set 11 comprises a gas internal combustion generator, the waste heat direct-combustion set 12 comprises a smoke hot water type waste heat direct-combustion machine, the gas generator set 11 and the waste heat direct-combustion set 12 are arranged correspondingly to provide cold and hot loads and electric loads for a building, and the generator control module 52 is used for controlling the power generation regulation and energy supply output modes of the gas generator set 11. The gas triple co-generation subsystem 100 can also comprise a cylinder liner water system plate heat exchanger 15 and a remote heat radiation water tank 16; the primary side of the cylinder water system plate heat exchanger 15 is respectively communicated with the gas generator set 11 and the remote radiating water tank 16, and the primary side of the cylinder water system plate heat exchanger 15 can be also provided with a bypass valve 14. The gas generator set 11 is connected with the waste heat direct-fired unit 12 through a flue, a three-way valve 13 is arranged on the flue, and one end of the three-way valve 13 is communicated with a bypass flue communicated to the outside. The gas triple-generation subsystem 100 and the storage battery energy storage subsystem 400 are connected to the same bus of a power supply and distribution system of a building.
Distributed photovoltaic power generation subsystem 200 includes photovoltaic modules and photovoltaic inverters 24. The photovoltaic modules are installed at the exposed position of a building, such as a roof, an exposed wall and the like, and each photovoltaic module comprises a standard polycrystalline silicon photovoltaic module 21, a standard thin film photovoltaic module 22 and a flexible thin film photovoltaic module 23, and each photovoltaic module corresponds to one photovoltaic inverter 24. The photovoltaic inverter 24 is electrically connected to the photovoltaic module for converting direct current generated by the photovoltaic module into alternating current and providing electrical load to the building, and for controlling the energy output mode of the distributed photovoltaic power generation subsystem 200.
The wind power generation subsystem 300 comprises a wind power generator set 31, a rectifier 32, a direct current combiner box 33, a voltage clamping storage battery 34 and a wind power inverter 35 which are electrically connected in sequence. The wind generating set 31 comprises an S-shaped vertical axis wind turbine, alternating current generated by the wind generating set 31 is converted into stable direct current through a rectifier 32, the direct current is converged through a direct current converging box 33 and then charges a voltage clamping storage battery 34, the direct current output by the voltage clamping storage battery 34 is converted into alternating current through a wind power inverter 35 and is connected with the distributed photovoltaic power generation subsystem 200 in a grid mode to provide electric load for a building; the wind power inverter 35 is also used to control the power output mode of the wind power subsystem 300.
The storage battery energy storage subsystem 400 comprises a storage battery pack 41, an energy storage converter 42 and an energy storage control module 51; the storage battery pack 41 can comprise a lithium iron phosphate storage battery, the energy storage converter 42 is electrically connected with the storage battery pack 41 and used for converting direct current output by the storage battery pack 41 into alternating current and providing electric load for a building, the energy storage control module 51 is used for controlling the operation mode of the coupled energy supply system and controlling the generator control module 52, the photovoltaic inverter 24, the wind power inverter 35 and the storage battery pack 41 so as to set the energy supply output modes of the gas triple co-generation subsystem 100, the distributed photovoltaic power generation system 200, the wind power generation subsystem 300 and the storage battery energy storage subsystem 400.
The operation modes of the coupling energy supply system for the gas triple-generation and wind-solar-storage complementary power generation comprise a grid-connected operation mode and an isolated grid operation mode. The energy supply output mode comprises a constant power output mode and a constant voltage and constant frequency output mode. The energy storage control module 51 serves as a master control unit of the coupled energy supply system, the generator control module 52, the photovoltaic inverter 24, the wind power inverter 35 and the storage battery pack 41 serve as slave control units of the coupled energy supply system, and the slave control units are in communication connection with the master control unit.
The coupling energy supply system for the gas triple supply and wind-solar storage complementary power generation further comprises an isolation transformer 25 and an alternating current header cabinet (not shown in the figure), wherein the input end of the isolation transformer 25 is respectively and electrically connected with the output ends of the photovoltaic inverters 24 corresponding to the standard thin film photovoltaic module 22 and the flexible thin film photovoltaic module 23, and the output end of the isolation transformer 25 is connected with the output end of the photovoltaic inverter 24 corresponding to the standard polycrystalline silicon photovoltaic module 21 in parallel. The output of the wind power inverter 35 is connected in parallel with the output of the photovoltaic inverter 24. The output end of the isolation transformer 25, the output end of the wind power inverter 35 and the output end of the photovoltaic inverter 24 corresponding to the standard polycrystalline silicon photovoltaic module 21 are electrically connected with the input end of an alternating current convergence cabinet, and the output end of the alternating current convergence cabinet is electrically connected with a bus of a power supply and distribution system of a building.
The utility model provides a coupling energy supply system of complementary electricity generation is stored up with scene to gas trigeminy supplies subsystem 100 to main energy supply structure, its power supply part with distributed photovoltaic power generation subsystem 200, wind power generation subsystem 300 and battery energy storage subsystem 400 organic coupling, complement each other. The energy storage control module 51 is used as a main control unit to ensure constant voltage and constant frequency of the coupled energy supply system. The generator control module 52, the photovoltaic inverter 24, the wind power inverter 35 and the storage battery pack 41 are used as slave control units to continuously output constant power, so that the defect of isolated network operation of the conventional gas generator is solved.
The coupled energy supply system for gas triple supply and wind-solar hybrid power generation provided by the present invention is described in detail below with reference to a specific embodiment.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a coupled power supply system for gas triple-generation and wind-solar-storage complementary power generation provided by the present embodiment, and as shown in fig. 2, the system includes: the system comprises a gas triple co-generation subsystem 100, a distributed photovoltaic power generation subsystem 200, a wind power generation subsystem 300 and a storage battery energy storage subsystem 400. The gas triple co-generation subsystem 100 includes process devices such as a gas generator set 11 and a waste heat direct-fired machine 12, the gas generator set 11 may include a gas internal combustion generator, and the waste heat direct-fired machine 12 may include a flue gas hot water type waste heat direct-fired machine set (full afterburning type). The gas generator set 11 and the waste heat direct-fired generator set 12 are arranged in a one-to-one correspondence manner and provide cold and heat loads and electric loads for the building. The distributed photovoltaic power generation system 200 comprises electrical equipment such as a standard polycrystalline silicon photovoltaic module 21, a standard thin film photovoltaic module 22, a flexible thin film photovoltaic module 23 and a photovoltaic inverter 24, the wind power generation subsystem 300 comprises electrical equipment such as a wind power generation electronic unit 31, a rectifier 32, a voltage clamping storage battery 34 and a wind power inverter 35, and the storage battery energy storage subsystem 400 comprises electrical equipment such as a storage battery pack 41, an energy storage converter 42 and an energy storage control module 51.
The gas generator set 11 of the gas triple co-generation subsystem 100 first generates electricity by using high-grade heat energy generated by burning natural gas, and the electricity is merged into a power supply and distribution system of a building where the electricity is generated to supply power load for the building. Meanwhile, the high-temperature flue gas and the high-temperature cooling water waste heat discharged by the gas generator set 11 are used as heat sources of the waste heat direct-fired unit 12 for cooling in a cooling season and heating in a heating season. A three-way valve 13 is arranged on a flue connected between the gas generator set 11 and the waste heat direct-fired unit 12, and when the cold and heat loads are small, part of flue gas is directly exhausted to the outside through a bypass flue; similarly, a bypass valve 14 is arranged on the primary side of a cylinder liner water system plate heat exchanger 15, and the waste heat of the high-temperature cooling water of the gas generator set 11 can also be directly discharged outdoors through a remote heat-dissipation water tank 16. The gas triple co-generation subsystem 100 can meet the cold and heat load requirements of the building by mainly adjusting the three-way valve 13 and the bypass valve 14 in priority and assisting the supplement/reduction of the waste heat direct-fired machine 12 according to the change conditions of the cold and heat loads and the electric load.
In order to ensure that the waste heat direct-fired machine 12 can still meet the requirements of cold and heat loads when the gas generator 11 does not work or can not work at full load, namely when no waste heat of high-temperature flue gas and high-temperature cooling water is available or insufficient in supply, the waste heat direct-fired machine 12 of the gas triple co-generation subsystem can adopt a full afterburning type. The output power of the gas generator 11 is set by the energy storage control module 51, and the power generation regulation control of the gas generator 11 is completed by the generator control module 52.
The utility model discloses a heating, supply the concrete operation strategy in cold season and transition season as follows:
(1) referring to fig. 3, the heating season operating strategy: starting the gas generator set 11 and the waste heat direct-fired machine set 12, when the return water temperature of the gas triple co-generation subsystem 100 is too high, firstly reducing the opening degree of the flue three-way valve 13, at the moment, completely closing the flue three-way valve 13 when the return water temperature is still too high, increasing the opening degree of the cylinder liner water system bypass valve 14, and at the moment, reducing the combustion of the waste heat direct-fired machine set 12 when the return water temperature is still too high. If the subsystem return water temperature is detected to be too low after the gas generator set 11 and the waste heat direct-fired unit 12 are started, the opening degree of a bypass valve 14 of a cylinder liner water system is reduced, at the moment, if the return water temperature is detected to be still too low, the bypass valve 14 of the cylinder liner water system is completely closed, the opening degree of a flue three-way valve 13 is increased, and if the return water temperature is detected to be still too low, the waste heat direct-fired unit 12 is subjected to afterburning.
(2) Referring to fig. 4, cooling season operation strategy: starting the gas generator set 11 and the waste heat direct-fired unit 12, when the return water temperature of the gas triple co-generation subsystem 100 is too low, firstly reducing the opening degree of the flue three-way valve 13, at the moment, if the return water temperature is still too low, completely closing the flue three-way valve 13, increasing the opening degree of the cylinder liner water system bypass valve 14, and at the moment, if the return water temperature is still too low, reducing the combustion of the waste heat direct-fired unit 12. If the subsystem return water temperature is detected to be too high after the gas generator set 11 and the waste heat direct-fired unit 12 are started, the opening degree of the bypass valve 14 of the cylinder liner water system is reduced, at the moment, if the return water temperature is detected to be still too high, the bypass valve 14 of the cylinder liner water system is completely closed, the opening degree of the flue three-way valve 13 is increased, and if the return water temperature is detected to be still too high, the waste heat direct-fired unit 12 is subjected to afterburning.
(3) Referring to fig. 5, the transition season operating strategy: starting the gas generator set 11 and the waste heat direct-fired machine set 12, closing the flue three-way valve 13, discharging all flue gas of the gas generator set 11 from a flue, normally starting the cylinder liner water system plate heat exchanger 15 along with the gas generator set 11, and adjusting the opening of the bypass valve 14 of the cylinder liner water system to the maximum.
The utility model discloses a distributed photovoltaic power generation subsystem adopts the system's scheme that the piecemeal electricity generation, concentrate to be incorporated into the power networks, establishes a point of being incorporated into the power networks altogether. The solar photovoltaic modules of the distributed photovoltaic power generation subsystem 200 include standard polycrystalline silicon photovoltaic modules 21, standard thin film photovoltaic modules 22, and flexible thin film photovoltaic modules 23. The photovoltaic module converts solar energy into potential difference between different parts of a semiconductor by utilizing a photovoltaic effect of a semiconductor interface so as to generate direct current; the direct current is converted into alternating current through the photovoltaic inverter 24 after being converged; after passing through the isolation transformer 25, the alternating currents corresponding to the two positions of the standard thin film photovoltaic module 22 and the flexible thin film photovoltaic module 23 are converged with the alternating current corresponding to the standard polycrystalline silicon photovoltaic module 21, and are uniformly merged into a bus of a power supply and distribution system of a building where the modules are located.
The wind power generation subsystem 300 of the present invention employs 6 wind power generators 31, the wind power generators 31 first use wind power to drive the windmill blades to rotate, and further drive the generators to generate electricity, and the generated unstable alternating current is converted into stable direct current through the rectifier 32; the direct current is converged by the direct current convergence box 33, and the voltage clamp storage battery 34 is charged, so that the electric energy is converted into chemical energy; the direct current output by the voltage clamping storage battery 34 is converted into alternating current through the wind power inverter 35, and is merged into a bus of a power supply and distribution system of the building together with the distributed photovoltaic power generation subsystem 200 to provide power supply of electrical loads for the building.
The utility model discloses a battery energy storage subsystem 400 mainly includes energy storage control module 51, storage battery 41 and energy storage converter 42. The coupling energy supply system adopts an energy storage control module 51 as a master control unit, and a generator control module 52, the photovoltaic inverter 24, the wind power inverter 35 and the storage battery pack 41 as slave control units. The operation modes of the coupling energy supply system are divided into a grid-connected operation mode and an isolated network operation mode, and the coupling energy supply system is controlled by the main control unit to be mutually switched under the two modes according to a specified operation strategy. The main control unit controller needs to detect parameters such as voltage, current and power in the coupled energy supply system, and adopts corresponding adjustment according to the condition occurring in the operation of the coupled energy supply system, so as to ensure the power balance and the stability of the voltage and the frequency of the coupled energy supply system.
The utility model discloses an operation mode as follows:
when the coupled energy supply system is in grid-connected operation, the master control unit and the slave control unit both adopt a constant power output mode to supplement and support a large power grid together; when a large power grid fails or a coupled energy supply system is actively separated from the large power grid and enters an isolated power grid to operate, the main control unit is converted from a constant power output mode to a constant voltage and constant frequency output mode, the slave control unit is still started in the constant power output mode, the storage battery energy storage subsystem 400 and the gas generator 11 are matched to operate in the isolated power grid mode, and the main control unit adjusts the slave control unit to realize power balance of the power grid.
When the coupled energy supply system operates in an isolated network, the master control unit adopts a constant-voltage constant-frequency output mode, and the slave control unit adopts a constant-power output mode to supply power to the coupled energy supply system; when the load in the coupled energy supply system changes, the energy storage control module 51 of the master control unit needs to set the output power value of the generator control module 52 according to the actual situation, and the rest of the slave control units always output in a constant power output mode. When the power load power is larger than the total output power of the gas triple co-generation subsystem 100, the distributed photovoltaic power generation subsystem 200 and the wind power generation subsystem 300, the gas generator set 11 is required to increase the output power to ensure the load power supply; when the total output power of the gas triple co-generation subsystem 100, the distributed photovoltaic power generation subsystem 200 and the wind power generation subsystem 300 is greater than the power load power, the stable operation of the coupled energy supply system is ensured by reducing the output power of the gas generator set 11 or enabling the storage battery energy storage subsystem 400 to absorb redundant power.
When the large power grid is recovered to be normal or the isolated power grid operation plan is finished and the grid is connected again, the main control unit is converted into a constant power output mode from a constant voltage and constant frequency output mode. Switching between the two modes requires fast and smooth switching.
The utility model discloses a concrete operation strategy of coupling energy supply system as follows:
when the electricity selling price is at the valley value between 23 hours and 7 days, the electricity load of the building is supplied by a large power grid, the storage battery energy storage subsystem 400 is charged, and the operation mode of the coupling energy supply system is a grid-connected operation mode;
7, starting the gas triple co-generation subsystem, switching the storage battery energy storage subsystem 400 to an isolated network operation mode without power failure in cooperation with the coupling energy supply system, enabling the storage battery energy storage subsystem 400 to be in a constant-voltage constant-frequency output mode at the moment, enabling the gas generator to be connected with a large power grid in a grid-connected mode, and operating to set power in the constant-power output mode;
and 7-23 hours, the storage battery energy storage subsystem 400 is matched with the gas triple co-generation subsystem to operate in an isolated network to provide electric energy for the electric load of the building:
when the power load is lower than 50% of the power of the gas generator set 11, the gas generator set 11 stops running, and the storage battery energy storage subsystem 400 independently supplies power to run; when the capacity of the storage battery energy storage subsystem 400 is reduced to 10%, starting the gas generator set 11 for load operation, and charging the storage battery energy storage subsystem 400; if the gas generator set 11 and the storage battery energy storage subsystem 400 both have faults at the stage, the coupling energy supply system is switched to a grid-connected operation mode;
when the power load is higher than or equal to 50% of the power of the gas generator set 11, the gas generator set 11 operates at a set power (lower than the power load by 50kW), and the storage battery energy storage subsystem 400 operates in a constant-voltage constant-frequency output mode to adjust the load fluctuation; if the gas generator set 11 and the storage battery energy storage subsystem 400 both have faults at the stage, the coupling energy supply system is switched to a grid-connected operation mode.
At 23, the storage battery energy storage subsystem 400 is matched with the coupling energy supply system to switch to a grid-connected operation mode without power failure, and the storage battery energy storage subsystem 400 starts to charge.
It will be appreciated by those of skill in the art that the term "comprises" or any other similar term is intended to cover a non-exclusive inclusion, such that an article or apparatus/device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus/device.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. A coupling energy supply system of gas triple-generation and wind-solar-storage complementary power generation is used for providing cold and heat loads and electric loads for buildings, and is characterized by comprising:
the gas triple co-generation subsystem comprises a gas generator set, a generator control module and a waste heat direct-combustion set; the gas generator set is arranged corresponding to the waste heat direct-fired unit and is used for providing cold and heat loads and electric loads for the building, and the generator control module is used for controlling the power generation regulation and energy supply output modes of the gas generator set;
the distributed photovoltaic power generation subsystem comprises a photovoltaic component and a photovoltaic inverter, wherein the photovoltaic component is installed at the position, facing the sun, of the building, and the photovoltaic inverter is electrically connected with the photovoltaic component and used for converting direct current generated by the photovoltaic component into alternating current, providing an electric load for the building and controlling an energy supply output mode of the distributed photovoltaic power generation subsystem;
the wind power generation subsystem comprises a wind power generator set, a rectifier, a direct current combiner box, a voltage clamping storage battery and a wind power inverter which are electrically connected in sequence; the alternating current generated by the wind generating set is converted into stable direct current through the rectifier, the direct current is converged through the direct current convergence box and then charges the voltage clamping storage battery, and the direct current output by the voltage clamping storage battery is converted into alternating current through the wind power inverter and is connected with the distributed photovoltaic power generation subsystem in a grid mode to provide electric load for the building; the wind power inverter is also used for controlling an energy supply output mode of the wind power generation subsystem;
the storage battery energy storage subsystem comprises a storage battery pack, an energy storage converter and an energy storage control module; the energy storage converter is electrically connected with the storage battery pack and used for converting direct current output by the storage battery pack into alternating current and providing electric load for the building, and the energy storage control module is used for controlling the operation mode of the coupling energy supply system and controlling the generator control module, the photovoltaic inverter, the wind power inverter and the storage battery pack so as to set energy supply output modes of the gas triple co-generation subsystem, the distributed photovoltaic power generation system, the wind power generation subsystem and the storage battery energy storage subsystem;
the operation mode comprises a grid-connected operation mode and an isolated grid operation mode, and the energy supply output mode comprises a constant power output mode and a constant voltage and constant frequency output mode.
2. The coupled energy supply system for the complementary power generation of the wind-solar energy storage and the triple gas supply as claimed in claim 1, wherein the triple gas supply subsystem further comprises a cylinder liner water system plate heat exchanger and a remote heat dissipation water tank; the primary side of the cylinder liner water system plate type heat exchanger is respectively communicated with the gas generator set and the remote heat dissipation water tank, and the primary side of the cylinder liner water system plate type heat exchanger is also provided with a bypass valve.
3. The coupling energy supply system for the complementary power generation of the gas triple supply, the wind, the light and the storage of the gas triple supply as claimed in claim 1, wherein the gas generator set and the waste heat direct-fired set are connected through a flue, a three-way valve is arranged on the flue, and one end of the three-way valve is communicated with a bypass flue which is communicated with the outside.
4. The coupled energy supply system for complementary power generation of gas triple co-generation and wind-solar-energy storage of claim 1, wherein the gas triple co-generation subsystem and the storage battery energy storage subsystem are connected to the same bus of the power supply and distribution system of the building.
5. The coupled energy supply system for complementary power generation by triple gas supply and wind-solar-energy storage according to claim 1, wherein the photovoltaic modules comprise a standard polycrystalline silicon photovoltaic module, a standard thin film photovoltaic module and a flexible thin film photovoltaic module, and each corresponds to one photovoltaic inverter.
6. The coupled energy supply system for complementary power generation by triple gas supply and wind-solar-energy storage according to claim 5, further comprising an isolation transformer, wherein the input end of the isolation transformer is electrically connected with the output end of the photovoltaic inverter corresponding to the standard thin film photovoltaic module and the flexible thin film photovoltaic module respectively, and the output end of the isolation transformer is connected with the output end of the photovoltaic inverter corresponding to the standard polycrystalline silicon photovoltaic module in parallel.
7. The coupled energy supply system for complementary power generation by gas triple power supply and wind-solar-energy storage of claim 6, wherein the output end of the wind power inverter is connected in parallel with the output end of the photovoltaic inverter.
8. The coupled energy supply system for complementary power generation by triple gas supply and wind-solar-energy storage according to claim 7, further comprising an ac combiner cabinet, wherein the output end of the isolation transformer, the output end of the wind power inverter and the output end of the photovoltaic inverter are electrically connected with the input end of the ac combiner cabinet, and the output end of the ac combiner cabinet is electrically connected with a bus of the power supply and distribution system of the building.
9. The coupled energy supply system for complementary power generation of gas triple-generation wind-solar-storage according to claim 1, wherein the gas generator set comprises a gas internal combustion generator, and/or
The waste heat direct-fired unit comprises a flue gas hot water type waste heat direct-fired machine and/or
The wind generating set comprises an S-shaped vertical axis wind turbine, and/or
The storage battery pack comprises a lithium iron phosphate storage battery.
10. The coupled energy supply system of the complementary power generation of wind, light and energy storage of gas trigeminy and of claim 1, characterized in that the energy storage control module is used as a master control unit of the coupled energy supply system, the generator control module, the photovoltaic inverter, the wind power inverter and the storage battery are used as slave control units of the coupled energy supply system, and the slave control units are in communication connection with the master control unit.
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