CN117833770A - Mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system - Google Patents
Mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system Download PDFInfo
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- CN117833770A CN117833770A CN202311823047.3A CN202311823047A CN117833770A CN 117833770 A CN117833770 A CN 117833770A CN 202311823047 A CN202311823047 A CN 202311823047A CN 117833770 A CN117833770 A CN 117833770A
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- 238000010248 power generation Methods 0.000 title claims abstract description 194
- 238000004146 energy storage Methods 0.000 claims abstract description 118
- 238000012544 monitoring process Methods 0.000 claims abstract description 52
- 241001672018 Cercomela melanura Species 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 230000002457 bidirectional effect Effects 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 19
- 238000005286 illumination Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/40—Mobile PV generator systems
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system which consists of a diesel power generation unit, a photovoltaic power generation system, an energy storage module, a power load data acquisition and monitoring module and a power generation unit control center, wherein the energy storage module and the photovoltaic power generation system are added into a power supply system to supply power in parallel when in overload according to load information acquired by the data acquisition and monitoring module and the working condition of the diesel power generation unit, and the energy storage module is used as a load to charge the diesel power generation unit when in low load, so that the diesel power generation unit is maintained to operate in a load rate range with higher power generation efficiency, and the oil consumption is reduced; meanwhile, a standby power supply for the diesel generator set to fail can be provided to cope with emergency; and can provide the power supply required by the black start of the diesel generator set, avoid relying on the movable diesel generator set to carry on various problems brought by black start. The intelligent control, protection and management of the power generation system which is often in open-air isolated network operation can be realized, the power generation efficiency of the system is improved, the oil consumption is reduced, and the use cost is reduced.
Description
Technical Field
The invention relates to the technical field of mobile energy supply equipment, in particular to a mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system integrated with an energy storage module.
Background
The mobile energy supply device is generally applied to remote field operation or camping, desert areas and other areas, and the local land, wide people and thin power grid cannot be covered. The conventional mobile energy equipment is generally formed by making a diesel generator set into a box body, wherein a base is arranged at the bottom of the box body and can be placed on a trailer or a trailer to be towed by a vehicle for moving or placed in a container to be towed to a destination by a container vehicle. When the mobile diesel generator sets work in the wild or desert, once the diesel generator sets are out of order, the trouble is caused, particularly in the evening, no standby power supply can cause the availability of no electricity, equipment maintenance cannot be carried out at night, and if a small standby generator set is equipped at any time, the cost is high. Or the diesel generator is used for black start, electromagnetic induction and electrochemical reaction inside the engine are utilized to take electricity from the stored unit battery, the engine is guided to obtain sufficient energy, and then the electric energy is output through the control of the circuit. However, the black start of the diesel generator has various problems, such as the working environment of the diesel generator, such as air circulation, etc., the running condition, such as exhaust back pressure, oil injector oil injection hole blocking condition, valve clearance, etc., the requirements of important parts, such as a cylinder barrel, a piston ring abrasion degree, quality, etc., and fuel quality, etc., are relatively high, and the internal temperature of the diesel generator set is too high during the black start, so that deflagration is easy to generate, and the diesel generator black start is not suitable for being adopted under non-emergency conditions.
In addition, the mobile diesel generator set is in an environment where a power grid cannot reach, such as a desert, an open field and the like, and is independently operated to output electric energy, and is a typical isolated network working mode, and in the situation, the diesel generator set power supply system has a plurality of problems that (1) the running load rate of the set is low: in order to ensure the reliability and stability of power supply, the overall load rate of the diesel generator set is generally kept at about 60% under the normal condition, so that sufficient margin is reserved as spare capacity to cope with various emergency situations; the power generation efficiency is low, and the unit power generation oil consumption is high: because the power generation efficiency of the diesel generator set has a direct relation with the operation load rate of the diesel generator set, when the load rate is about 80%, the power generation efficiency is an ideal condition, but the diesel generator set is used as a mobile diesel generator set in an off-grid independent power generation working mode, because the load rate is lower, the power generation oil consumption is higher, the power generation efficiency is lower, the fuel is not easy to save, and the diesel generator set is a great disadvantageous factor for the mobile diesel generator set working in desert, open field and other places.
Disclosure of Invention
Aiming at the application requirements of the prior art, the invention aims to provide a mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system, wherein an energy storage module is arranged in the system, so that the work of a diesel generator set can be intelligently controlled according to the power load condition, the power generation efficiency of the diesel generator set is improved, and the oil consumption is saved; and can provide standby power in emergency, and solve the problems caused by power consumption and black start when the diesel generator fails.
Specifically, in order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system comprises a diesel power generator set arranged in a box body, a photovoltaic power generation system arranged at the top of the box body, an energy storage module and a power generator set control center arranged in the box body, and a data acquisition and monitoring module; the photovoltaic power generation system comprises a photovoltaic module array arranged at the top of the box body and a control box arranged in the box body; the generator set control center is connected with the diesel generator set, the photovoltaic power generation system control box and the energy storage module through a circuit and a communication connection network; the diesel generator set is connected with an electric load through an alternating current bus; the energy storage module comprises a bidirectional DC/AC conversion module, a battery management module and a storage battery pack; the data acquisition and monitoring module is connected with the load alternating current bus for monitoring load data in real time and transmitting the data to the generator set control center, and the generator set control center controls the operation of the diesel generator set according to the load condition.
Preferably, the battery management module is used as a control portal between the energy storage module and the diesel generator set when the diesel generator set charges the storage battery set, and is used as a control portal between the energy storage module and the load when the storage battery set discharges the load, so that the energy storage module is protected in real time.
Still preferably, the control box of the photovoltaic power generation system comprises a confluence module and a DC/AC conversion module, the control box is respectively connected with an electric load through an alternating current bus and is electrically connected with the energy storage module, and when illumination exists, the photovoltaic power generation system converts direct current generated by the photovoltaic module into alternating current through the DC/AC conversion module in the control box to supply power to the load; when the load is no-load or the diesel generator runs at the optimal load rate, the photovoltaic power generation system charges the energy storage module through the control box.
Preferably, the energy storage module is used as a load to be charged by the diesel generator set when the electricity load is low, and the bidirectional DC/AC conversion module adjusts the charging current according to the spare condition of the load, so that the diesel generator set operates at a load rate with higher power generation efficiency.
Still preferably, the bidirectional DC/AC conversion module is provided with a communication interface with the battery management module, and transmits operation information of the storage battery pack to a control center of the generator set, wherein the operation information comprises a voltage value, a current value, power and residual electric quantity which are output by the storage battery pack in real time during discharging, and a real-time voltage, current, power and electric quantity when the diesel generator set charges the storage battery pack.
Preferably, the data acquisition and monitoring module is connected with the load alternating current bus, main electrical parameters such as voltage and current of the load bus are obtained in real time, the load rate is calculated and compared with preset parameters, data information is transmitted to the generator set control center in real time, the generator set control center sends out an instruction according to the result, the diesel generator set charges the storage battery of the energy storage module, or the storage battery supplies power to the load, or the diesel generator set is adjusted to idle running.
Still preferably, the operation control flow of the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system is as follows:
s1: starting a diesel generator set, and establishing signal connection between a generator set control center and a diesel generator, a control box of a photovoltaic power generation system, an energy storage module and a data acquisition and monitoring module;
s2: when the photovoltaic power generation system normally generates power, the generated electric energy is converted into alternating current through the control box and then is supplied to the power utilization load through the power utilization load alternating current bus; the electric energy data generated by the photovoltaic power generation system is acquired through a data acquisition and monitoring module and is transmitted to a generator set control center;
s3: the diesel generator set supplies power to the load through an alternating current bus, the data acquisition and monitoring module acquires load data in real time, the real-time load rate is calculated, the real-time load rate is compared with a preset load rate value of the diesel generator set, when the load is in a preset load rate value range, the diesel generator set maintains a normal working state, and at the moment, the photovoltaic power generation system and the diesel generator set are connected in parallel to supply power to the load;
s4, when the load is higher than a preset load value range, the generator set control center receives overload information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is sufficient and suitable for discharging, an instruction is given to the energy storage module, a storage battery of the energy storage module discharges the load through an alternating current bus through a bidirectional DC/AC conversion module, a battery management module monitors the discharging condition of the storage battery in real time, excessive discharging is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set, the photovoltaic power generation system and the energy storage module are powered in parallel; when the residual electric quantity of the energy storage module is insufficient to discharge outwards, the control center of the generator set gives an alarm to inform a user to close unnecessary loads;
s5, when the load is lower than a preset load value range, the generator set control center receives low-load information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is insufficient and suitable for charging, an instruction is sent to the diesel generator set to charge the energy storage module, and the battery management module monitors the charging condition of the storage battery in real time to avoid overcharge; when the electric quantity of the energy storage module is sufficient and continuous charging cannot be carried out, the generator set control center switches the diesel generator set into an idle running state according to the load information given by the data acquisition and monitoring module.
Still preferably, the photovoltaic power generation system charges the energy storage module to store electrical energy as a backup power source when the hybrid intelligent power generation system is in an idle condition.
Still preferably, when the photovoltaic power generation system cannot generate power in cloudy days or at night, the working control process of the hybrid intelligent power generation system is as follows:
s1, when a diesel generator set works normally, starting the diesel generator set, and establishing signal connection among a generator set control center, the diesel generator set, an energy storage module and a data acquisition and monitoring module;
s2, the diesel generator set supplies power to the load through an alternating current bus, the data acquisition and monitoring module acquires load data in real time, the real-time load rate is calculated, the real-time load rate is compared with a preset load rate value of the diesel generator set, and when the load is in a preset load rate value range, the diesel generator set maintains a normal working state;
s3, when the load is higher than a preset load value range, the generator set control center receives overload information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is sufficient and suitable for discharging, an instruction is sent to the energy storage module, the energy storage module discharges the load through an alternating current bus, the battery management module monitors the discharge condition of the storage battery in real time, excessive discharge is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set and the energy storage module are powered in parallel; when the residual electric quantity of the energy storage module is insufficient to discharge outwards, the control center of the generator set gives an alarm to inform a user to close unnecessary loads;
s4, when the load is lower than a preset load value range, the generator set control center receives low-load information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is insufficient, an instruction is sent to the diesel generator set to charge the energy storage module, the battery management module monitors the charging condition of the storage battery in real time to avoid overcharge, and at the moment, the energy storage module is used as a load to adjust the load rate of the diesel generator set to enable the diesel generator set to operate at a load rate with higher power generation efficiency; when the electric quantity of the energy storage module is sufficient and continuous charging cannot be carried out, the generator set control center switches the diesel generator set into an idle running state according to the load information given by the data acquisition and monitoring module.
Still preferably, the preset load rate of the diesel generator set is 75% -85%.
And preferably, when the diesel generator set fails and cannot work normally, the energy storage module serves as a black start power supply of the diesel generator set, and electricity utilization of auxiliary equipment of the diesel generator set is provided.
The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system comprises a diesel power generation set, a photovoltaic power generation system, an energy storage module, a power load data acquisition and monitoring module and a power generation set control center, wherein the energy storage module and the photovoltaic power generation system are added into a power supply system to supply power in parallel when in overload according to load information acquired by the data acquisition and monitoring module and the working condition of the diesel power generation set, and the energy storage module is used as a load to charge the diesel power generation set when in low load, so that the diesel power generation set is maintained to operate within a load rate range with higher power generation efficiency, and oil consumption is reduced; meanwhile, a standby power supply for the diesel generator set to fail can be provided to cope with emergency; and can provide the power supply required by the black start of the diesel generator set, avoid relying on the movable diesel generator set to carry on various problems brought by black start. The intelligent control, protection and management of the power generation system which is often in open-air isolated network operation can be realized, the power generation efficiency of the system is improved, the oil consumption is reduced, and the use cost is reduced.
Drawings
The foregoing and other objects, features, and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings. Wherein:
FIG. 1 is a schematic diagram of a mobile diesel generation and photovoltaic generation hybrid intelligent power generation system according to the present invention;
fig. 2 is a schematic structural diagram of a photovoltaic module array inclination angle adjusting and fixing device of the hybrid intelligent power generation system according to the present invention;
fig. 3 is a schematic structural view of an end fixing bracket of a photovoltaic module array of the hybrid intelligent power generation system according to the present invention;
fig. 4 is a schematic structural diagram of a fixing bracket on the back of a photovoltaic module array of the hybrid intelligent power generation system according to the present invention;
FIG. 5 is a schematic plan view of the inside of a housing of the hybrid intelligent power generation system of the present invention;
FIG. 6 is a schematic diagram of a system architecture of a hybrid intelligent power generation system for mobile diesel generation and photovoltaic generation according to the present invention;
fig. 7 is a schematic diagram of a control process of the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to the present invention.
Detailed Description
According to practical application requirements, the invention provides a mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system, which can improve power generation efficiency, save oil consumption and provide a standby power supply when a diesel generator set fails under the condition that the diesel generator set is in off-grid independent power generation.
Specifically, referring to fig. 1, 5 and 6, the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system of the present invention includes a diesel generator set 100 disposed in a box 10, a photovoltaic power generation system 200 disposed at the top of the box 10, an energy storage module 300 disposed in the box 10, a generator set control center 110 and a data acquisition and monitoring module 400; the diesel generator set 100, the generator set control center 110 and the energy storage module 300 are arranged in the box body 10; the photovoltaic power generation system 200 includes a photovoltaic module array 201 disposed on top of the case 10 and a control box 202; the generator set control center 110 is connected with the diesel generator set 100, the photovoltaic power generation system control box 202 and the energy storage module 300 through a circuit and communication connection network; the diesel generating set 100 is connected with an electric load through an alternating current bus; the energy storage module 300 includes a bi-directional DC/AC conversion module 310, a battery management module 320, and a battery pack 330; the data acquisition and monitoring module 400 is connected with the load alternating current bus to monitor load data in real time, and transmits the data to the generator set control center 110, and the generator set control center 110 controls the operation of the diesel generator set according to the load condition.
In an embodiment, the storage battery 330 of the energy storage module may be a lead-acid battery, a ternary lithium battery, or a lithium iron phosphate battery, and preferably a lithium iron phosphate battery may be selected for its technical maturity, stable performance and high cost performance. In addition, in order to prevent the overcharge and overdischarge of the secondary battery, the energy storage module 300 is further provided with a battery management module 320 (BMS, battery Management System) as a control portal between the energy storage module and the diesel-electric generator set when the diesel-electric generator set charges the secondary battery; when the storage battery pack discharges the load, the storage battery pack is used as a control portal between the energy storage module and the load, and the energy storage module is protected in real time.
In the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system, a photovoltaic power generation system control box 202 comprises a converging module and a DC/AC conversion module, the control box is respectively connected with an electric load through an alternating current bus and is electrically connected with an energy storage module, and when illumination exists, the photovoltaic power generation system 200 converts direct current generated by a photovoltaic module into alternating current to supply power to the load preferentially through the DC/AC conversion module in the control box; when the load is no-load or the diesel generator is running at an optimal load rate, the photovoltaic power generation system 200 charges the energy storage module through the control box.
In the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system of the invention, the energy storage module 300 can be used as a load to charge the diesel power generation unit 200 when the power consumption load is low, and can also be used as a standby power supply to supply power to the power consumption load when the load is high or the diesel power generation unit fails, so that the DC/AC conversion module 310 in the energy storage module 200 is a bidirectional converter, and when the diesel power generation unit (output is alternating current) charges the storage battery 330 of the energy storage module, the bidirectional DC/AC conversion module 310 converts the alternating current into direct current to charge; when the energy storage module is required to discharge the load, the direct current output by the storage battery pack is direct current, and the direct current is converted into alternating current through the bidirectional DC/AC conversion module 310 to supply power to the load through the alternating current bus.
In an embodiment, the bidirectional DC/AC conversion module is provided with a communication interface with the battery management module, so that the operation information of the storage battery pack can be transmitted to the generator set control center 110, for example, information such as a voltage value, a current value, power, residual electric quantity and the like output by the storage battery pack in real time during discharging, and information such as real-time voltage, current, power, electric quantity and the like when the diesel generator set charges the storage battery pack.
The data acquisition and monitoring module 400 is connected with the load ac bus, acquires main electrical parameters such as voltage and current of the load bus in real time, calculates a load rate, compares the load rate with preset parameters, transmits data information to the generator set control center 110 in real time, and the generator set control center 110 sends an instruction according to the result to charge a storage battery of the energy storage module by the diesel generator set 100 or supply power to the load by the storage battery or adjust the diesel generator set 100 to idle running.
The photovoltaic module array of the photovoltaic power generation system is fixed at the top of the box body through a positioning system, and referring to fig. 1-4, the photovoltaic module array 201 is shown in fig. 4, and a plurality of photovoltaic modules are fixed through a fixed cross bar 223 and a fixed vertical bar 224 on the back of the module, wherein the fixed cross bar 223 is fixedly connected with the fixed vertical bar 224; the angle adjusting and fixing device 210 is connected with a fixing vertical rod 224, and two ends of the fixing cross rod 223 are fixedly connected with the end fixing bracket 220. Referring to fig. 2, the angle adjusting and fixing device 210 includes a positioning plate 211 fixed to the top of the case, on which a lifting device 213 is disposed, so that the inclination angle of the photovoltaic module array can be adjusted to obtain a better illumination angle, and the power generation efficiency of the photovoltaic module is improved; in a preferred embodiment, the positioning plate 211 is provided with a through hole 212, and a connection cable of the photovoltaic module array can be connected with the control box in the box body through the through hole 212, and a power line of the driving motor of the lifting device 213 can also be connected with a power output interface of the generator set control center 110 through the through hole 212 to supply power to the driving motor. The lifting device 213 comprises a fixed end 2101, a lifting end 2102 and a connecting end 2103, wherein one of the fixed vertical rods 224 on the back of the photovoltaic module array is fixedly connected with the connecting end 2103.
In a preferred embodiment, two or more photovoltaic module arrays may be provided depending on the size of the top area of the case 10 and the size of the photovoltaic module, and two or more lifting devices 213 may be provided correspondingly.
Referring to fig. 3, the end fixing bracket 220 includes a fixing base 221 fixed to the case, on which a stand column 222 is provided, and a fixing cross bar 223 is rotatably connected and fixed to the stand column 222, and in a preferred embodiment, a bearing (not shown) may be provided at a connection portion of the fixing cross bar 223 and the stand column 222 to smoothly rotate.
In a preferred embodiment, the positioning plate 211, the fixing base 221 and the box 10 are detachably fixed, so that when the mobile diesel generator set is transported, the transportation space can be saved and the transportation cost can be reduced; and the user can select whether to install photovoltaic power generation assembly as required, need not to carry out big institutional advancement to the box and just can adapt to different demands.
In another preferred embodiment, the bottom of the box 10 is provided with a system bearing chassis 20, which is used as a bearing base of the whole power generation system, and meanwhile, square holes for forklift operation are formed in the system bearing chassis 20, so that the power generation system can be conveniently moved and transported.
Specifically, in connection with the working flow schematic diagram of the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to an embodiment of the present invention shown in fig. 6 and 7, the working process is as follows:
s1: starting a diesel generator set, and establishing signal connection between a generator set control center 110 and a diesel generator 100, a control box 202 of a photovoltaic power generation system, an energy storage module 300 and a data acquisition and monitoring module 400;
s2: when the hybrid intelligent power generation system is in a clear and shining application occasion, preferentially, the electric energy generated by the photovoltaic power generation system is converted into alternating current through the control box and then is supplied to the electric load through the electric load alternating current bus; the electric energy data generated by the photovoltaic power generation system is acquired and transmitted to the generator set control center 110 through a data acquisition and monitoring module connected with the electric load alternating current bus;
s3: the diesel generator set 100 supplies power to the load through an alternating current bus, the data acquisition and monitoring module 400 acquires load data in real time, calculates real-time load rate, compares the real-time load rate with a preset load rate value of the diesel generator set, and maintains a normal working state when the load is in a preset load rate value range, and at the moment, the photovoltaic power generation system 200 and the diesel generator set 100 are connected in parallel to supply power to the load;
s4, when the load is higher than a preset load value range, namely overload, the generator set control center 110 receives overload information given by the data acquisition and monitoring module 400, and checks the residual electric quantity of the energy storage module 300, if the electric quantity is sufficient and suitable for discharging, an instruction is sent to the energy storage module 300, the storage battery 330 of the energy storage module discharges the load through the alternating current bus through the bidirectional DC/AC conversion module, the battery management module 320 monitors the discharging condition of the storage battery 330 in real time, and excessive discharging is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set 100, the photovoltaic power generation system 200 and the energy storage module 300 are powered in parallel; when the remaining power of the energy storage module 300 is insufficient to discharge outwards, that is, the storage battery is overdischarged, the generator set control center 110 gives an alarm to inform a user to close unnecessary loads so that the diesel generator can operate at a preset load rate;
s5, when the load is lower than a preset load value range, namely, low load, the generator set control center 110 receives low load information given by the data acquisition and monitoring module 400, checks the residual electric quantity of the energy storage module 300, if the electric quantity is insufficient and is suitable for charging, a command is sent to the diesel generator set 100 to charge the energy storage module 300, the diesel generator set 100 charges the storage battery 330 of the energy storage module through the bidirectional C/AC conversion module, and the battery management module 320 monitors the charging condition of the storage battery 330 in real time to avoid overcharge; when the electric quantity of the energy storage module 300 is sufficient and continuous charging cannot be performed, the generator set control center 110 switches the diesel generator set 110 into an idle running state according to the load information given by the data acquisition and monitoring module 400 so as to save oil consumption; in the process, the photovoltaic power generation system and the diesel generator set are used for supplying power to the load in parallel, and the energy storage module is used as the load to adjust the load rate of the diesel generator set so that the diesel generator set can operate at the load rate with higher power generation efficiency, and the oil consumption is saved.
When the hybrid intelligent power generation system is in an idle condition, the photovoltaic power generation system 200 charges the energy storage module 300 to store electrical energy as a backup power source.
When the diesel generator set fails and cannot normally work, if the power is supplied to a power-using load through a control box by a photovoltaic power generation system in an illumination environment, if the power is large, a generator set control center 110 sends out instructions to power the load through an alternating current bus by an energy storage module 300 through a bidirectional DC/AC conversion module according to load information given by the data acquisition and monitoring module 400, at the moment, the data acquisition and monitoring module 400 gives out load information, and if overload conditions still exist, namely the load can cause overdischarge of a storage battery, the bidirectional DC/AC conversion module can stop discharging of the storage battery, and the generator set control center 110 gives out alarm information to remind a user to reduce unnecessary load operation; when the load is in a safe discharge range of the storage battery pack, the bidirectional DC/AC conversion module can control the storage battery pack to continue discharging; at this time, the photovoltaic power generation system and the energy storage module supply power to the load in parallel.
The working control process of the hybrid intelligent power generation system when the photovoltaic power generation system has illumination conditions and can generate power is that when the photovoltaic power generation system cannot generate power in cloudy days or at night, the control process is as follows:
s1, when a diesel generator set 100 works normally, starting the diesel generator set, and establishing signal connection between a generator set control center 110 and the diesel generator set 100, an energy storage module 300 and a data acquisition and monitoring module 400;
s2, the diesel generator set 100 supplies power to a load through an alternating current bus, the data acquisition and monitoring module 400 acquires load data in real time, calculates a real-time load rate, compares the real-time load rate with a preset load rate value of the diesel generator set, and maintains a normal working state when the load is in a preset load rate value range;
s3, when the load is higher than a preset load value range, namely overload, the generator set control center 110 receives overload information given by the data acquisition and monitoring module 400, and checks the residual electric quantity of the energy storage module 300, if the electric quantity is sufficient and suitable for discharging, an instruction is sent to the energy storage module 300, the storage battery 330 of the energy storage module discharges the load through the alternating current bus through the bidirectional DC/AC conversion module, the battery management module 320 monitors the discharging condition of the storage battery 330 in real time, excessive discharging is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set and the energy storage module are powered in parallel; when the remaining power of the energy storage module 300 is insufficient to discharge, that is, the storage battery is overdischarged, the generator set control center 110 gives an alarm to inform the user to turn off unnecessary loads;
s4, when the load is lower than a preset load value range, namely, low load, the generator set control center 110 receives low load information given by the data acquisition and monitoring module 400, checks the residual electric quantity of the energy storage module 300, if the electric quantity is insufficient and is suitable for charging, then a command is sent to the diesel generator set 100 to charge the energy storage module 300, the diesel generator set 100 charges the storage battery 330 of the energy storage module through the bidirectional DC/AC conversion module, the battery management module 320 monitors the charging condition of the storage battery 330 in real time, overcharge is avoided, and at the moment, the energy storage module 300 is used as the load to adjust the load rate of the diesel generator set to enable the diesel generator set to operate at the load rate with higher power generation efficiency, and oil consumption is saved; when the electric quantity of the energy storage module 300 is sufficient and continuous charging cannot be performed, the generator set control center 110 switches the diesel generator set 100 to an idle running state according to the load information given by the data acquisition and monitoring module 400 so as to save oil consumption.
In a preferred embodiment, the preset load rate of the diesel-electric set is 75% -85%.
In another preferred embodiment, when the diesel generator set charges the storage battery of the energy storage module, the bidirectional DC/AC conversion module can adjust the charging current according to the spare condition of the load, and the load is charged with larger current when the difference between the load and the preset load rate is larger.
The invention has the other advantage that when the diesel generator set fails and can not work normally, the photovoltaic power generation system and the energy storage module are used as power supplies to supply power to the load under the condition of illumination; under the condition of no illumination, the energy storage module is used as a power supply to supply power to a load; this restores the partial power supply to the entire power supply system. In addition, the energy storage module can serve as a black start power supply of the diesel generator set, and power consumption of auxiliary equipment of the diesel generator set is provided, so that the diesel generator set is started, and various problems caused by black start by the diesel generator set are avoided; in addition, a standby power supply can be provided, so that a user can conveniently perform fault detection and maintenance on the diesel generator set under an emergency condition, and the power supply of the system can be recovered as soon as possible.
The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system comprises a diesel power generation set, a photovoltaic power generation system, an energy storage module, a power load data acquisition and monitoring module and a power generation set control center, wherein the energy storage module and the photovoltaic power generation system are added into a power supply system to supply power in parallel when in overload according to load information acquired by the data acquisition and monitoring module and the working condition of the diesel power generation set, and the energy storage module is used as a load to charge the diesel power generation set when in low load, so that the diesel power generation set is maintained to operate within a load rate range with higher power generation efficiency, and oil consumption is reduced; meanwhile, a standby power supply for the diesel generator set to fail can be provided to cope with emergency; and can provide the power supply required by the black start of the diesel generator set, avoid relying on the movable diesel generator set to carry on various problems brought by black start. The intelligent control, protection and management of the power generation system which is often in open-air isolated network operation can be realized, the power generation efficiency of the system is improved, the oil consumption is reduced, and the use cost is reduced.
The invention is not limited to the embodiments described, but a person skilled in the art may make modifications or changes without departing from the spirit of the invention, i.e. the scope of the disclosure, and the scope of the invention is defined by the claims.
Claims (11)
1. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system is characterized by comprising a diesel power generator set arranged in a box body, a photovoltaic power generation system arranged at the top of the box body, an energy storage module and a power generator set control center arranged in the box body, and a data acquisition and monitoring module; the photovoltaic power generation system comprises a photovoltaic module array arranged at the top of the box body and a control box arranged in the box body; the generator set control center is connected with the diesel generator set, the photovoltaic power generation system control box and the energy storage module through a circuit and a communication connection network; the diesel generator set is connected with an electric load through an alternating current bus; the energy storage module comprises a bidirectional DC/AC conversion module, a battery management module and a storage battery pack; the data acquisition and monitoring module is connected with the load alternating current bus for monitoring load data in real time and transmitting the data to the generator set control center, and the generator set control center controls the operation of the diesel generator set according to the load condition.
2. The hybrid intelligent power generation system for mobile diesel power generation and photovoltaic power generation according to claim 1, wherein the battery management module is used as a control portal between the energy storage module and the diesel generator set when the diesel generator set charges the storage battery set, and is used as a control portal between the energy storage module and the load when the storage battery set discharges the load, so as to protect the energy storage module in real time.
3. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein a control box of the photovoltaic power generation system comprises a converging module and a DC/AC conversion module, the control box is respectively connected with an electric load through an alternating current bus and is electrically connected with an energy storage module, and when illumination exists, the photovoltaic power generation system converts direct current generated by a photovoltaic module into alternating current through the DC/AC conversion module in the control box to supply power to the load; when the load is no-load or the diesel generator runs at the optimal load rate, the photovoltaic power generation system charges the energy storage module through the control box.
4. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein the energy storage module is used as a load to be charged by the diesel generator set when the power load is low, and the bidirectional DC/AC conversion module adjusts the charging current according to the spare condition of the load, so that the diesel generator set operates at a load rate with high power generation efficiency.
5. The system of claim 1, wherein the bi-directional DC/AC conversion module is provided with a communication interface with the battery management module, and transmits the operation information of the battery pack to a control center of the generator set, including a voltage value, a current value, power and a residual power output by the battery pack in real time during discharging, and a real-time voltage, current, power and power when the battery pack is charged by the diesel generator set.
6. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein the data acquisition and monitoring module is connected with the load alternating current bus, main electrical parameters such as voltage and current of the load bus are obtained in real time, the load rate is calculated and compared with preset parameters, data information is transmitted to the generator set control center in real time, the generator set control center sends an instruction according to the result to charge a storage battery of the energy storage module by the diesel generator set, or the storage battery supplies power to the load or the diesel generator set is adjusted to idle running.
7. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein the operation control flow of the mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system is as follows:
s1: starting a diesel generator set, and establishing signal connection between a generator set control center and a diesel generator, a control box of a photovoltaic power generation system, an energy storage module and a data acquisition and monitoring module;
s2: when the photovoltaic power generation system normally generates power, the generated electric energy is converted into alternating current through the control box and then is supplied to the power utilization load through the power utilization load alternating current bus; the electric energy data generated by the photovoltaic power generation system is acquired through a data acquisition and monitoring module and is transmitted to a generator set control center;
s3: the diesel generator set supplies power to the load through an alternating current bus, the data acquisition and monitoring module acquires load data in real time, the real-time load rate is calculated, the real-time load rate is compared with a preset load rate value of the diesel generator set, when the load is in a preset load rate value range, the diesel generator set maintains a normal working state, and at the moment, the photovoltaic power generation system and the diesel generator set are connected in parallel to supply power to the load;
s4, when the load is higher than a preset load value range, the generator set control center receives overload information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is sufficient and suitable for discharging, an instruction is given to the energy storage module, a storage battery of the energy storage module discharges the load through an alternating current bus through a bidirectional DC/AC conversion module, a battery management module monitors the discharging condition of the storage battery in real time, excessive discharging is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set, the photovoltaic power generation system and the energy storage module are powered in parallel; when the residual electric quantity of the energy storage module is insufficient to discharge outwards, the control center of the generator set gives an alarm to inform a user to close unnecessary loads;
s5, when the load is lower than a preset load value range, the generator set control center receives low-load information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is insufficient and suitable for charging, an instruction is sent to the diesel generator set to charge the energy storage module, and the battery management module monitors the charging condition of the storage battery in real time to avoid overcharge; when the electric quantity of the energy storage module is sufficient and continuous charging cannot be carried out, the generator set control center switches the diesel generator set into an idle running state according to the load information given by the data acquisition and monitoring module.
8. The hybrid intelligent power generation and photovoltaic power generation system of claim 7, wherein the photovoltaic power generation system charges the energy storage module to store electrical energy as a backup power source when the hybrid intelligent power generation system is in an idle condition.
9. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein when the photovoltaic power generation system cannot generate power in cloudy days or at night, the operation control process of the hybrid intelligent power generation system is as follows:
s1, when a diesel generator set works normally, starting the diesel generator set, and establishing signal connection among a generator set control center, the diesel generator set, an energy storage module and a data acquisition and monitoring module;
s2, the diesel generator set supplies power to the load through an alternating current bus, the data acquisition and monitoring module acquires load data in real time, the real-time load rate is calculated, the real-time load rate is compared with a preset load rate value of the diesel generator set, and when the load is in a preset load rate value range, the diesel generator set maintains a normal working state;
s3, when the load is higher than a preset load value range, the generator set control center receives overload information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is sufficient and suitable for discharging, an instruction is sent to the energy storage module, the energy storage module discharges the load through an alternating current bus, the battery management module monitors the discharge condition of the storage battery in real time, excessive discharge is avoided, and at the moment, the whole power generation system is in a state that the diesel generator set and the energy storage module are powered in parallel; when the residual electric quantity of the energy storage module is insufficient to discharge outwards, the control center of the generator set gives an alarm to inform a user to close unnecessary loads;
s4, when the load is lower than a preset load value range, the generator set control center receives low-load information given by the data acquisition and monitoring module, the residual electric quantity of the energy storage module is checked, if the electric quantity is insufficient, an instruction is sent to the diesel generator set to charge the energy storage module, the battery management module monitors the charging condition of the storage battery in real time to avoid overcharge, and at the moment, the energy storage module is used as a load to adjust the load rate of the diesel generator set to enable the diesel generator set to operate at a load rate with higher power generation efficiency; when the electric quantity of the energy storage module is sufficient and continuous charging cannot be carried out, the generator set control center switches the diesel generator set into an idle running state according to the load information given by the data acquisition and monitoring module.
10. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 7 or 9, wherein the preset load rate of the diesel generator set is 75% -85%.
11. The mobile diesel power generation and photovoltaic power generation hybrid intelligent power generation system according to claim 1, wherein when the diesel generator set fails and cannot work normally, the energy storage module serves as a black start power supply of the diesel generator set, and power utilization of auxiliary equipment of the diesel generator set is provided.
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