CN103532143A - New energy power generation system capable of making up power prediction accuracy - Google Patents
New energy power generation system capable of making up power prediction accuracy Download PDFInfo
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Abstract
The invention relates to the technical field of energy storage, in particular to a new energy power generation system and a method capable of making up power prediction accuracy. The system comprises a numerical weather forecast server, a computing system and a monitoring system, wherein the numerical weather forecast server is connected with the computing system and used for transmitting weather forecast data to the computing system; a power prediction server in the computing system predicts power according to related data information; the computing system is connected with the monitoring system and transmits the predicted power to the monitoring system; and an energy storage management unit in the monitoring system controls an energy storage unit to charge or discharge according to the predicted power to realize peak clipping and valley filling. The system realizes the peak clipping and the valley filling for ultrashort-term prediction precision and short-term prediction precision and makes up a prediction accuracy error through interaction between hardware. Therefore, stable power output of the new energy power generation system is realized after grid-connected operation.
Description
Technical field
The present invention relates to energy storage technology field, be specifically related to a kind of grid-connected power generation system that pre-power is surveyed precision that makes up.
Background technology
Generation of electricity by new energy technology refers to the technology of utilizing wind energy, solar energy, geothermal energy etc. to generate electricity, and the new forms of energy such as wind-force, photovoltaic exist the features such as intrinsic fluctuation, randomness and uncontrollability.After the grid-connected application of the system of utilizing new forms of energy to generate electricity, if can not grid-connected power generation system power be carried out effectively prediction and be determined, can cause a hidden trouble to the safety and stability of large Power System Interconnection operation, electrical network frequency modulation and reserve capacity planning are brought to certain impact, the electrical characteristics such as electric network swim distribution, dynamic characteristic and the quality of power supply are exerted an influence.Therefore, after new-energy grid-connected operation, to grid-connected power generation system power, carry out rationally, effectively and accurately determine just most important.
In prior art, determining of grid-connected power generation system power often gets according to prediction, that is to say comprehensive according to Environmental variations and other factors, and then generated output is predicted.Generated output for new forms of energy generally obtains by prediction mode, for prediction mode, has ultra-short term prediction, short-term forecast, medium-term forecast and long-term forecast etc.Ultra-short term prediction is the prediction of predicted time in one hour; Short-term forecast is that predicted time is in intraday prediction; Medium-term forecast be predicted time in 1 year with interior prediction; And long-term forecast is that predicted time is in more than 1 year prediction.Different prediction mode, the power that prediction obtains is often different, for example, utilize wind energy to generate electricity, and because the variation of the wind-force difference instant with weather changes, and presents variedly, and different prediction mode prediction wind power generation power can draw different numerical value.Therefore, how to make up actual power and predicted power, and the difference between various predicted power, guarantee that generation of electricity by new energy has a stable generated output after grid-connected, guarantee that the stable of its power just seems very important.
Summary of the invention
For ensureing that generation of electricity by new energy, after being incorporated into the power networks, can provide a stable power stage, guarantee the safety and stability of operation of power networks, the embodiment of the present invention provides following technical scheme:
In first aspect, the embodiment of the present invention provides a kind of grid-connected power generation system that makes up power prediction precision, comprising: numerical weather forecast server, computing system and supervisory control system; Wherein, described numerical weather forecast server is connected with described computing system, and for sending data of weather forecast to computing system, described computing system is connected with described supervisory control system, realizes exchanges data; Wherein,
Described computing system comprises again: reverse isolation device, data acquisition server, web server, database server, power prediction server, energy storage strategic server, PC work station, switch and hardware firewall; Wherein,
Described reverse isolation device is for being connected with numerical weather forecast server, and described data acquisition server is connected with described reverse isolation device, for receiving data of weather forecast; Described data acquisition server is connected with described database server by described web server, and the data of weather forecast of reception is sent to described database server by described web server; Described database server is connected with described power prediction server, described power prediction server is for predicting power according to the data message of database server, described PC work station is connected with described power prediction server respectively with described energy storage strategic server, the strategy that described energy storage strategic server discharges and recharges according to described power prediction server prediction power determination, described PC work station is used for realizing control, displaying and human-machine operation; Described energy storage strategic server, power prediction server and described hardware firewall are connected with described switch respectively, the communication of described switch for gathering all kinds of servers; Described hardware firewall is for controlling the transmission of signal between computing system and supervisory control system;
Described supervisory control system comprises again: generation of electricity by new energy unit, unit supervisory control system, energy storage monitor system, power conversion device, energy storage management system and energy-storage units; Wherein,
Described energy-storage units is connected with described energy storage management system, described energy storage management system is for managing discharging and recharging of described energy-storage units, described energy storage management system is connected with described power conversion device, and described power conversion device is realized the conversion that described energy-storage units discharges and recharges power; Described energy storage monitor system is connected with described power conversion device respectively with described generation of electricity by new energy unit, and described energy storage monitor system is for monitoring the energy storage of energy-storage units; Described generation of electricity by new energy unit is connected with described unit supervisory control system, and described unit supervisory control system is monitored the generating of described generation of electricity by new energy unit; Described unit supervisory control system is respectively used to be connected with the hardware firewall of described computing system with described energy storage monitor system, described unit supervisory control system sends the generating information of described generation of electricity by new energy unit to described computing system, described energy storage monitor system receives the predicted power of described computing system, and discharge and recharge according to energy storage management system control energy-storage units described in described predicted power, realize the peak load shifting to predicted power.
Further, the described grid-connected power generation system that makes up power prediction precision, described generation of electricity by new energy unit is wind turbine generator, described unit supervisory control system is fan monitoring system, and described energy-storage units adopts lithium ion battery array energy storage and described energy storage management system to adopt battery management system.
Further, the described grid-connected power generation system that makes up power prediction precision, the energy storage of described employing lithium ion battery array is for adopting the energy storage of 15MW*4h battery modules.
Further, the described grid-connected power generation system that makes up power prediction precision, described generation of electricity by new energy unit is photovoltaic array, and described unit supervisory control system is photovoltaic supervisory control system, and described energy-storage units adopts fuse salt energy storage and described energy storage management system to adopt thermal management systems.
Further, the described grid-connected power generation system that makes up power prediction precision, described employing molten salt energy-storage is for adopting the energy storage of 20MW*8h fuse salt energy storage canister.
Further, the described grid-connected power generation system that makes up power prediction precision, described generation of electricity by new energy unit is geothermal energy generating set.
Further, the described grid-connected power generation system that makes up power prediction precision, described numerical weather forecast server, data acquisition server, web server, database server, power prediction server and described energy storage strategic server adopt IBMX3650 type.
Further, the described grid-connected power generation system that makes up power prediction precision, described hardware firewall adopts USG2110-F.
Further, the described grid-connected power generation system that makes up power prediction precision, described reverse isolation device adopts StoneWall2000.
Further, the described grid-connected power generation system that makes up power prediction precision, described power conversion device adopts dual channel controller.
Technical solution of the present invention is by cooperatively interacting between hardware and acting on and realize the object of the invention.Weather forecast service device obtains and sends data of weather forecast to computing system, power prediction server prediction excess of export short term power and short term power, then utilize energy storage strategic server to calculate the error of ultra-short term predicted power and short-term forecast power prediction precision; Energy storage strategic server is sent to supervisory control system the error of precision of prediction by switch, hardware firewall according to setting.Energy storage monitor system in supervisory control system receives precision of prediction error, and according to precision of prediction error energy-storage units, under management system effect, realizes the peak load shifting to predicted power, makes up precision of prediction error.With this, stable power stage after realizing grid-connected power generation system and being incorporated into the power networks.
In second aspect, the embodiment of the present invention provides a kind of generation of electricity by new energy method that makes up power prediction precision, comprising:
Obtain ultra-short term predicted power and short-term forecast power;
More described ultra-short term predicted power and short-term forecast power;
When described ultra-short term predicted power is greater than described short-term forecast power, and while meeting charge condition, control energy-storage units and charge; And
When described ultra-short term predicted power is less than described short-term forecast power, and while meeting discharging condition, control energy-storage units and discharge.
The technical scheme that the embodiment of the present invention provides, the discharging and recharging of the difference decision systems by ultra-short term predicted power and short-term forecast power.With this, stable power stage after realizing grid-connected power generation system and being incorporated into the power networks.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, does not form limitation of the invention.In the accompanying drawings:
It shown in Fig. 1, is the grid-connected power generation system structural representation that makes up power prediction precision in the embodiment of the present invention one;
It shown in Fig. 2, is the wind generator system structural representation that makes up power prediction precision in the embodiment of the present invention two;
It shown in Fig. 3, is the light energy power generating system structural representation that makes up power prediction precision in the embodiment of the present invention three;
It shown in Fig. 4, is the generation of electricity by new energy method flow schematic diagram that makes up power prediction precision in the embodiment of the present invention four.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is carried out more in detail and complete explanation.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
Generation of electricity by new energy technology refers to the technology of utilizing wind energy, luminous energy (solar energy), geothermal energy etc. to generate electricity, and the new forms of energy such as wind-force, photovoltaic exist the features such as intrinsic fluctuation, randomness and uncontrollability.The unsteadiness of generation of electricity by new energy, also just further causes the unsteadiness of generation of electricity by new energy power and is difficult to certainty.Therefore, the grid-connected power generation system being incorporated into the power networks for needs, accurately, reasonably determines that generated output is just very important to guaranteeing the grid-connected operation of grid-connected power generation system.The generated output of new forms of energy generally obtains by prediction mode, for prediction mode, has ultra-short term prediction, short-term forecast, medium-term forecast and long-term forecast etc.Ultra-short term prediction be predicted time at one hour with interior prediction; Short-term forecast be predicted time at one day with interior prediction; Medium-term forecast be predicted time in 1 year with interior prediction; And long-term forecast is that predicted time is in more than 1 year prediction.Ultra-short term prediction is often used as the actual power of generation of electricity by new energy in grid-connected power generation system practical application, as the power of generation of electricity by new energy after being incorporated into the power networks.After being incorporated into the power networks, grid-connected power generation system for keeping the stable of electrical network must keep a stable power stage, therefore need to maintain the stability as the ultra-short term predicted power output of actual power power.
For realizing the ultra-short term predicted power of grid-connected power generation system, that is to say the stability of real output, need to adopt the way of peak load shifting.Peak load shifting is by the scheduling of Generation Side or electricity consumption side, and the sub-load by peakload in the period is arranged into low ebb in the load period, so that the low ebb load of the peakload of the system of reduction, increase system improves load factor; That is to say that, when actual power is during lower than set point, the energy storage device of electricity generation system configuration discharges, and makes up the deficiency of power; When actual power is greater than set point, the energy storage device of electricity generation system configuration charges.Short-term forecast is based on extraneous weather condition, predicts the prediction mode of the generated output within a day.After generation of electricity by new energy is incorporated into the power networks, the scheduling of generated output generally be take to sky as basis, therefore can using the power of short-term forecast as the set point that adopts peak load shifting method, by configure corresponding energy-storage system in electricity generation system, realize the error of precision between ultra-short term prediction and short-term forecast, that is to say, making up precision of prediction is the difference that makes up precision between ultra-short term prediction and short-term forecast.In concrete the present invention, according to the difference between ultra-short term predicted power and short-term forecast power, by discharging and recharging of energy storage management system management energy-storage units, realize making up of difference between ultra-short term predicted power and short-term forecast power, and then realize the peak load shifting to predicted power.
It is following that the present invention will be described in more detail in conjunction with the embodiments, what those skilled in the art should understand that is each electronic equipment, memory, intermediate medium, connecting line etc. in following embodiment, by certain connected mode, constituted mode etc., mutually combine, realize technical solution of the present invention.
It shown in Fig. 1, is the grid-connected power generation system structural representation that makes up power prediction precision in the embodiment of the present invention one.As shown in 1, described system comprises:
Numerical weather forecast server, computing system and supervisory control system; Wherein, numerical weather forecast server is connected with computing system, and for sending data of weather forecast to computing system, computing system is connected with supervisory control system, realizes exchanges data.
Computing system comprises again: reverse isolation device 101, data acquisition server 102, web server 103, database server 104, power prediction server 105, PC work station 106, energy storage strategic server 107, hardware firewall 108 and switch 109, wherein, reverse isolation device 101 is for being connected with numerical weather forecast server 102, and data acquisition server 102 is connected with reverse isolation device 101, for receiving data of weather forecast, data acquisition server 102 is connected with database server 104 by web server 103, the data of weather forecast of reception is sent to database server 104 by web server 103 to be stated database server 104 and is connected with power prediction server 105, power prediction server 105 is for predicting power according to the data message of database server 104, PC work station 106 is connected with power prediction server 105 respectively with energy storage strategic server 107, energy storage strategic server 107 is determined the strategy discharging and recharging according to power prediction server 105 predicted power, PC work station 106 is for realizing control, show and human-machine operation, energy storage strategic server 107, power prediction server 105 and hardware firewall 108 are connected with switch 109 respectively, and switch 109 is for gathering the communication of all kinds of servers, hardware firewall 108 is for controlling the transmission of signal between computing system and supervisory control system.
Supervisory control system comprises again: energy-storage units 110, energy storage management system 111, power conversion device 112, energy storage monitor system 113, generation of electricity by new energy unit 114 and unit supervisory control system 115; Wherein, energy-storage units 110 is connected with energy storage management system 111, energy storage management system 111 is for managing discharging and recharging of energy-storage units 110, and energy storage management system 111 is connected with power conversion device 112, and power conversion device 112 is realized the conversion that energy-storage units 110 discharges and recharges power; Energy storage monitor system 113 is connected with power conversion device 112 respectively with generation of electricity by new energy unit 114, and energy storage monitor system 113 is for monitoring the energy storage of energy-storage units 110; Generation of electricity by new energy unit 114 is connected with unit supervisory control system 115, the generating of unit supervisory control system 115 monitoring generation of electricity by new energy units 114; Unit supervisory control system 115 is respectively used to be connected with the hardware firewall of computing system with energy storage monitor system 113, the generating information that unit supervisory control system 115 sends generation of electricity by new energy unit is to computing system, energy storage monitor system 113 receives the predicted power of computing system, and discharge and recharge according to predicted power energy storage management system control energy-storage units, realize the peak load shifting to predicted power.
Concrete, in the present embodiment, power prediction server 105 predicted power are prediction ultra-short term predicted power and short-term forecast power.Energy storage strategic server 107 is according to the ultra-short term predicted power of prediction and the short-term forecast power meter difference of calculating the two, and further through prediction difference, be sent to energy storage monitor system, energy storage monitor system 113 determines discharging and recharging of energy-storage system 110 according to the difference of the two, realizes the peak load shifting to predicted power.
In the present embodiment, numerical weather forecast server and reverse isolation device 101 be by wireless, such as WIFI, CDMA, 3G etc., or adopt the modes such as wire communication to connect; Reverse isolation device 101 is connected with data acquisition server 102.Reverse isolation device 101 is a kind of Internet Transmission control hardwares, guarantee that numerical weather forecast server can only be to data acquisition server 102 transmission files, and the outside Transmit message of data acquisition server 102, data acquisition server 101 is a kind of reception servers, receives numerical weather forecast file.
Energy storage strategic server 107, power prediction server 105 and hardware firewall 108 are connected with switch 109 respectively.The communication of switch for gathering all kinds of servers; Hardware firewall 108 is for controlling the transmission of signal between computing system and supervisory control system.
Energy-storage units 110 is connected with energy storage management system 111, and energy storage management system 111 is connected with power conversion device 112.Energy storage management system 111 is controlled discharging and recharging of energy-storage units 110; The stored energy unit such as the battery unit of energy-storage units 110 energy storage or capacitor unit.
Energy storage monitor system 113 is connected with power conversion device 112 respectively with generation of electricity by new energy unit 114, and generation of electricity by new energy unit 114 is connected with unit supervisory control system 115; Unit supervisory control system 115 is respectively used to be connected with the hardware firewall 108 of computing system with energy storage monitor system 113.Unit supervisory control system 115 realizes and energy storage monitor system 113 interconnected, implements the running status of adjusting unit; The generating set of the new forms of energy such as generation of electricity by new energy unit 114 finger wind energies or luminous energy (solar energy); Energy storage monitor system 113 is accused the system of power conversion device 112 start and stop processed and numerical value, can monitor the operating condition of total system; Power conversion device 112 transfers the electric energy of energy-storage units 110 or heat energy in the device of direct current or interchange point.
Preferably, in the present embodiment, numerical weather forecast server, data acquisition server 102, web server 103, database server 104, power prediction server 105 and described energy storage strategic server 107 adopt IBMX3650 type.
Preferably, in the present embodiment, hardware firewall 108 adopts USG2110-F.
Preferably, in the present embodiment, reverse isolation device 101 adopts StoneWall2000; Employing section east StoneWall2000 further.
Preferably, in the present embodiment, power conversion device 112 adopts dual channel controller.
Technical solution of the present invention is by cooperatively interacting between hardware and acting on and realize the object of the invention.Weather forecast service device obtains and sends data of weather forecast to computing system, power prediction server prediction excess of export short term power and short term power, then utilize energy storage strategic server to calculate the error of ultra-short term predicted power and short-term forecast power prediction precision; Energy storage strategic server is sent to supervisory control system the error of precision of prediction by switch, hardware firewall according to setting.Energy storage monitor system in supervisory control system receives precision of prediction error, and according to precision of prediction error energy-storage units, under management system effect, realizes the peak load shifting to predicted power, makes up precision of prediction error.With this, stable power stage after realizing grid-connected power generation system and being incorporated into the power networks.
It shown in Fig. 2, is the wind generator system structural representation that makes up power prediction precision in the embodiment of the present invention two.The wind power generation of take in the present embodiment describes as example, the energy-storage units that adapts therewith adopts lithium ion battery array, energy storage management system adopts battery management system, and generation of electricity by new energy unit adopts wind generator system, and fan monitoring system adopts photovoltaic supervisory control system; Wherein lithium ion battery is a kind of rechargeable battery, and it mainly relies on lithium ion between positive pole and negative pole, to move work.In charge and discharge process, Li+ comes and goes and embeds and de-embedding between two electrodes: during rechargable battery, Li+, from the de-embedding of positive pole, embeds negative pole through electrolyte, and negative pole is in rich lithium state; Contrary during electric discharge; Battery management system (BMS) is mainly in order to improve the utilance of battery, prevents that battery from occurring overcharging and overdischarge, extends the useful life of battery, the state of monitoring battery; Photovoltaic monitoring couples together the equipment such as the inverter of photovoltaic plant, header box, irradiation instrument, atmospherium, ammeter exactly by data wire, with photovoltaic plant data acquisition unit, carry out the data acquisition of these equipment, and upload to the webserver or local computing by modes such as GPRS, Ethernet, WIFI, make user on the Internet or local computing, check related data, facilitate power management personnel and user that the service data of photovoltaic plant is checked and managed.As shown in Figure 1, described system comprises:
Numerical weather forecast server, computing system and supervisory control system; Wherein, numerical weather forecast server is connected with computing system, and for sending data of weather forecast to computing system, computing system is connected with supervisory control system, realizes exchanges data.
Computing system comprises again: reverse isolation device 201, data acquisition server 202, web server 203, database server 204, power prediction server 205, PC work station 206, energy storage strategic server 207, hardware firewall 208 and switch 209, wherein, reverse isolation device 201 is for being connected with numerical weather forecast server 202, and data acquisition server 202 is connected with reverse isolation device 201, for receiving data of weather forecast, data acquisition server 202 is connected with database server 204 by web server 203, the data of weather forecast of reception is sent to database server 204 by web server 203 to be stated database server 204 and is connected with power prediction server 205, power prediction server 205 is for predicting power according to the data message of database server 204, PC work station 206 is connected with power prediction server 205 respectively with energy storage strategic server 207, energy storage strategic server 207 is determined the strategy discharging and recharging according to power prediction server 205 predicted power, PC work station 206 is for realizing control, show and human-machine operation, energy storage strategic server 207, power prediction server 205 and hardware firewall 208 are connected with switch 209 respectively, and switch 209 is for gathering the communication of all kinds of servers, hardware firewall 208 is for controlling the transmission of signal between computing system and supervisory control system.
Supervisory control system comprises again: lithium ion battery array 210, battery management system 211, power conversion device 212, energy storage monitor system 213, wind turbine generator 214 and fan monitoring system 215; Wherein, lithium ion battery array 210 is connected with battery management system 211, battery management system 211 is for managing discharging and recharging of lithium ion battery array 210, battery management system 211 is connected with power conversion device 212, and power conversion device 212 is realized the conversion that lithium ion battery array 210 discharges and recharges power; Energy storage monitor system 213 is connected with power conversion device 212 respectively with wind turbine generator 214, and energy storage monitor system 213 is for monitoring the energy storage of lithium ion battery array 210; Wind turbine generator 214 is connected with wind-force supervisory control system 215, the generating of wind-force supervisory control system 215 monitoring wind turbine generator 214; Wind-force supervisory control system 215 is respectively used to be connected with the hardware firewall of computing system with energy storage monitor system 213, the generating information that wind-force supervisory control system 215 sends generation of electricity by new energy unit is to computing system, energy storage monitor system 213 receives the predicted power of computing system, and discharge and recharge according to predicted power energy storage management system control energy-storage units, realize the peak load shifting to predicted power.
Concrete, in the present embodiment, power prediction server 205 predicted power are prediction ultra-short term predicted power and short-term forecast power.Energy storage strategic server 207 is according to the ultra-short term predicted power of prediction and the short-term forecast power meter difference of calculating the two, and further through prediction difference, be sent to energy storage monitor system, energy storage monitor system 213 determines discharging and recharging of lithium ion battery array 210 according to the difference of the two, realizes the peak load shifting to predicted power.
In the present embodiment, numerical weather forecast server and reverse isolation device 201 be by wireless, such as WIFI, CDMA, 3G etc., or adopt the modes such as wire communication to connect; Reverse isolation device 201 is connected with data acquisition server 202.Reverse isolation device 201 is a kind of Internet Transmission control hardwares, guarantee that numerical weather forecast server can only be to data acquisition server 202 transmission files, and the outside Transmit message of data acquisition server 202, data acquisition server 201 is a kind of reception servers, receives numerical weather forecast file.
Energy storage strategic server 207, power prediction server 205 and hardware firewall 208 are connected with switch 209 respectively.The communication of switch for gathering all kinds of servers; Hardware firewall is for controlling the transmission of signal between computing system and supervisory control system.
Lithium ion battery array 210 is connected with battery management system 211, and battery management system 211 is connected with power conversion device 212.
Energy storage monitor system 213 is connected with power conversion device 212 respectively with wind turbine generator 214, and wind turbine generator 214 is connected with fan monitoring system 215; Fan monitoring system 215 is respectively used to be connected with the hardware firewall 208 of computing system with energy storage monitor system 213.Fan monitoring system 215 and energy storage monitor system interconnected, implements to regulate the running status of unit; Wind turbine generator 214 finger wind power generation units; Energy storage monitor system 213 212 start and stop of power ratio control conversion equipment and numerical value, can monitor the operating condition of total system; Power conversion device 212 transfers the electric energy of energy-storage units or heat energy in the device of direct current or interchange point.
Preferably, in the present embodiment, battery management system 211 adopts LCL multiplex circuit.
Preferably, in the present embodiment, lithium ion battery array 210 adopts the energy storage of 15MW*4h battery modules.
Preferably, in the present embodiment, numerical weather forecast server, data acquisition server 202, web server 203, database server 204, power prediction server 205 and described energy storage strategic server 207 adopt IBMX3650 type.
Preferably, in the present embodiment, hardware firewall 208 adopts USG2110-F.
Preferably, in the present embodiment, reverse isolation device 201 adopts StoneWall2000; Employing section east StoneWall2000 further.
Preferably, in the present embodiment, power conversion device 212 adopts dual channel controller.
Technical solution of the present invention realizes the object of the invention by the effect of cooperatively interacting between hardware.Weather forecast service device obtains and sends data of weather forecast to computing system, power prediction server prediction excess of export short term power and short term power, then utilize energy storage strategic server to calculate the error of ultra-short term predicted power and short-term forecast power prediction precision; Energy storage strategic server is sent to supervisory control system the error of precision of prediction by switch, hardware firewall according to setting.Energy storage monitor system in supervisory control system receives precision of prediction error, and under battery management system effect, realizes the peak load shifting to predicted power according to precision of prediction error energy-storage units lithium ion battery array, makes up precision of prediction error.
It shown in Fig. 3, is the light energy power generating system structural representation that makes up power prediction precision in the embodiment of the present invention three.The optical energy power of take in the present embodiment describes as example, and the energy-storage units that adapts therewith adopts hot melt rock energy-storage units, and energy storage management system adopts thermal management systems, and generation of electricity by new energy unit adopts photovoltaic array, and unit supervisory control system adopts photovoltaic supervisory control system; Wherein, fuse salt energy storage is to utilize the raw materials such as sodium nitrate as heat transfer medium, is generally combined with solar light-heat power-generation system, make solar-thermal generating system possess energy storage and night generating capacity, can meet peak load regulation network needs.Photovoltaic monitoring couples together the equipment such as the inverter of photovoltaic plant, header box, irradiation instrument, atmospherium, ammeter exactly by data wire, with photovoltaic plant data acquisition unit, carry out the data acquisition of these equipment, and upload to the webserver or local computing by modes such as GPRS, Ethernet, WIFI, make user on the Internet or local computing, check related data, facilitate power management personnel and user that the service data of photovoltaic plant is checked and managed.As shown in Figure 3, described system comprises:
Numerical weather forecast server, computing system and supervisory control system; Wherein, numerical weather forecast server is connected with computing system, and for sending data of weather forecast to computing system, computing system is connected with supervisory control system, realizes exchanges data.
Computing system comprises again: reverse isolation device 301, data acquisition server 302, web server 303, database server 304, power prediction server 305, PC work station 306, energy storage strategic server 307, hardware firewall 308 and switch 309, wherein, reverse isolation device 201 is for being connected with numerical weather forecast server 202, and data acquisition server 202 is connected with reverse isolation device 201, for receiving data of weather forecast, data acquisition server 202 is connected with database server 204 by web server 203, the data of weather forecast of reception is sent to database server 204 by web server 203 to be stated database server 204 and is connected with power prediction server 205, power prediction server 205 is for predicting power according to the data message of database server 204, PC work station 206 is connected with power prediction server 205 respectively with energy storage strategic server 207, energy storage strategic server 207 is determined the strategy discharging and recharging according to power prediction server 205 predicted power, PC work station 206 is for realizing control, show and human-machine operation, energy storage strategic server 207, power prediction server 205 and hardware firewall 208 are connected with switch 209 respectively, and switch 209 is for gathering the communication of all kinds of servers, hardware firewall 208 is for controlling the transmission of signal between computing system and supervisory control system.
Supervisory control system comprises again: fuse salt energy-storage units 310, thermal management systems 311, power conversion device 312, energy storage monitor system 313, photovoltaic array 314 and photovoltaic supervisory control system 315; Wherein, fuse salt energy-storage system 310 is connected with thermal management systems 311, thermal management systems 311 is for managing discharging and recharging of fuse salt energy-storage system 310, thermal management systems 311 is connected with power conversion device 312, and power conversion device 312 is realized the conversion that fuse salt energy-storage system 310 discharges and recharges power; Energy storage monitor system 313 is connected with power conversion device 312 respectively with photovoltaic array 314, and energy storage monitor system 313 is for monitoring the energy storage of fuse salt energy-storage system 310; Photovoltaic array 314 is connected with photovoltaic supervisory control system 315, the generating of photovoltaic supervisory control system 315 monitor optical photovoltaic arrays 314; Photovoltaic supervisory control system 315 is respectively used to be connected with the hardware firewall of computing system with energy storage monitor system 313, the generating information that photovoltaic supervisory control system 315 sends generation of electricity by new energy unit is to computing system, energy storage monitor system 313 receives the predicted power of computing system, and discharge and recharge according to predicted power energy storage management system control energy-storage units, realize the peak load shifting to predicted power.
Concrete, in the present embodiment, power prediction server 305 predicted power are prediction ultra-short term predicted power and short-term forecast power.Energy storage strategic server 307 is according to the ultra-short term predicted power of prediction and the short-term forecast power meter difference of calculating the two, and further through prediction difference, be sent to energy storage monitor system, energy storage monitor system 313 determines discharging and recharging of fuse salt energy-storage system 310 according to the difference of the two, realizes the peak load shifting to predicted power.
In the present embodiment, numerical weather forecast server and reverse isolation device 301 be by wireless, such as WIFI, CDMA, 3G etc., or adopt the modes such as wire communication to connect; Reverse isolation device 301 is connected with data acquisition server 302.Reverse isolation device 301 is a kind of Internet Transmission control hardwares, guarantee that numerical weather forecast server can only be to data acquisition server 302 transmission files, and the outside Transmit message of data acquisition server 302, data acquisition server 301 is a kind of reception servers, receives numerical weather forecast file.
Energy storage strategic server 307, power prediction server 305 and hardware firewall 308 are connected with described switch 309 respectively.The communication of switch for gathering all kinds of servers; Hardware firewall is for controlling the transmission of signal between computing system and supervisory control system.
Hot melt rock energy-storage units 310 is connected with thermal management systems 311, and thermal management systems 311 is connected with power conversion device 312.Thermal management systems 311, by being connected with hot melt rock energy-storage units 310, is controlled discharging and recharging of hot melt rock energy-storage units 310.
Energy storage monitor system 313 is connected with power conversion device 312 respectively with photovoltaic array 314, and photovoltaic array 314 is connected with photovoltaic supervisory control system 315; Photovoltaic supervisory control system 315 is respectively used to be connected with the hardware firewall 308 of computing system with energy storage monitor system 313.Photovoltaic supervisory control system 115 can realize interconnected with energy storage monitor system 313, implements to regulate the running status of unit; The photovoltaic array unit of photovoltaic array 314 finger solar power generations; Energy storage monitor system 313 is accused the system of power conversion device 312 start and stop processed and numerical value, can monitor the operating condition of total system; Power conversion device 312 transfers the electric energy of energy-storage units or heat energy in the device of direct current or interchange point.
Preferably, in the present embodiment, thermal management systems 311 adopts the two tank heat exchangers that are equipped with LCL multiplex circuit.
Preferably, in the present embodiment, fuse salt energy-storage units 310 is for adopting the energy storage of 20MW*8h fuse salt energy storage canister.
Preferably, in the present embodiment, numerical weather forecast server, data acquisition server 302, web server 303, database server 304, power prediction server 305 and described energy storage strategic server 307 adopt IBMX3650 type.
Preferably, in the present embodiment, hardware firewall 308 adopts USG2110-F.
Preferably, in the present embodiment, reverse isolation device 301 adopts StoneWall2000; Employing section east StoneWall2000 further.
Preferably, in the present embodiment, power conversion device 312 adopts dual channel controller.
Technical solution of the present invention is by cooperatively interacting between hardware and acting on and realize the object of the invention.Weather forecast service device obtains and sends data of weather forecast to computing system, power prediction server prediction excess of export short term power and short term power, then utilize energy storage strategic server to calculate the error of ultra-short term predicted power and short-term forecast power prediction precision; Energy storage strategic server is sent to supervisory control system the error of precision of prediction by switch, hardware firewall according to setting.Energy storage monitor system in supervisory control system receives precision of prediction error, and under thermal management systems effect, realizes the peak load shifting to predicted power according to precision of prediction error fuse salt energy-storage units, makes up precision of prediction error.With this, stable power stage after realizing grid-connected power generation system and being incorporated into the power networks.
The generation of electricity by new energy method flow schematic diagram that makes up precision of prediction in the embodiment of the present invention four as shown in Figure 4.The present embodiment relates to noun, concept and other are with reference to embodiment, embodiment bis-and embodiment tri-, for clear brief overview of the present invention repeats no more in the present embodiment.As shown in Figure 4, described method comprises:
In this step, pass through detection and the prediction to generating environment, and then calculate and obtain ultra-short term predicted power Pu and short-term forecast power P s.
In this step, that is to say ultra-short term predicted power Pu and short-term forecast power P s are carried out to certain comparison.
Step 403, be greater than short-term forecast power when ultra-short term predicted power, and while meeting charge condition, control energy-storage units and charge.
In this step, when ultra-short term predicted power Pu is greater than short-term forecast power P s, and while meeting charge condition, control energy-storage units and carry out charged electrical; After ultra-short term predicted power Pu is less than short-term forecast power P s, system can judge whether to meet charge condition.If meet charge condition, system starts energy-storage units charging controlled discharge electric current, can stop electric discharge after being charged to certain condition.In the present embodiment, if do not meet charge condition, system can not start energy-storage module, and unit is operation as usual.
Preferably, the power charging in the present embodiment is the difference of ultra-short term predicted power and short-term forecast power.
Step 404, be less than short-term forecast power when ultra-short term predicted power, and while meeting discharging condition, energy-storage units discharges.
In this step, when ultra-short term predicted power Pu is less than short-term forecast power P s, and while meeting discharging condition, control energy-storage units and discharge; After ultra-short term predicted power Pu is less than short-term forecast power P s, system can judge whether to meet discharging condition.If meet discharging condition, system starts energy-storage units electric discharge controlled discharge electric current, can stop electric discharge after discharging into certain condition.In the present embodiment, if do not meet discharging condition, system can not start energy-storage module, and unit is operation as usual.
Preferably, the power discharging in the present embodiment is the difference of ultra-short term predicted power and short-term forecast power.
Further, if ultra-short term predicted power Pu is identical with short-term forecast power P s size, do not carry out charge or discharge, system held runs well and generates electricity.
The technical scheme that the embodiment of the present invention provides, the discharging and recharging of the difference decision systems by ultra-short term predicted power and short-term forecast power.With this, stable power stage after realizing grid-connected power generation system and being incorporated into the power networks.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (10)
1. a grid-connected power generation system that makes up power prediction precision, is characterized in that, comprising: numerical weather forecast server, computing system and supervisory control system; Wherein, described numerical weather forecast server is connected with described computing system, and for sending data of weather forecast to computing system, described computing system is connected with described supervisory control system, realizes exchanges data; Wherein,
Described computing system comprises again: reverse isolation device, data acquisition server, web server, database server, power prediction server, energy storage strategic server, PC work station, switch and hardware firewall; Wherein,
Described reverse isolation device is for being connected with numerical weather forecast server, and described data acquisition server is connected with described reverse isolation device, for receiving data of weather forecast; Described data acquisition server is connected with described database server by described web server, and the data of weather forecast of reception is sent to described database server by described web server; Described database server is connected with described power prediction server, described power prediction server is for predicting power according to the data message of database server, described PC work station is connected with described power prediction server respectively with described energy storage strategic server, the strategy that described energy storage strategic server discharges and recharges according to described power prediction server prediction power determination, described PC work station is used for realizing control, displaying and human-machine operation; Described energy storage strategic server, power prediction server and described hardware firewall are connected with described switch respectively, the communication of described switch for gathering all kinds of servers; Described hardware firewall is for controlling the transmission of signal between computing system and supervisory control system;
Described supervisory control system comprises again: generation of electricity by new energy unit, unit supervisory control system, energy storage monitor system, power conversion device, energy storage management system and energy-storage units; Wherein,
Described energy-storage units is connected with described energy storage management system, described energy storage management system is for managing discharging and recharging of described energy-storage units, described energy storage management system is connected with described power conversion device, and described power conversion device is realized the conversion that described energy-storage units discharges and recharges power; Described energy storage monitor system is connected with described power conversion device respectively with described generation of electricity by new energy unit, and described energy storage monitor system is for monitoring the energy storage of energy-storage units; Described generation of electricity by new energy unit is connected with described unit supervisory control system, and described unit supervisory control system is monitored the generating of described generation of electricity by new energy unit; Described unit supervisory control system is respectively used to be connected with the hardware firewall of described computing system with described energy storage monitor system, described unit supervisory control system sends the generating information of described generation of electricity by new energy unit to described computing system, described energy storage monitor system receives the predicted power of described computing system, and discharge and recharge according to energy storage management system control energy-storage units described in described predicted power, realize the peak load shifting to predicted power.
2. the grid-connected power generation system that makes up power prediction precision as claimed in claim 1, it is characterized in that, described generation of electricity by new energy unit is wind turbine generator, described unit supervisory control system is fan monitoring system, and described energy-storage units adopts lithium ion battery array energy storage and described energy storage management system to adopt battery management system.
3. the grid-connected power generation system that makes up power prediction precision as claimed in claim 2, is characterized in that, the energy storage of described employing lithium ion battery array is for adopting the energy storage of 15MW*4h battery modules.
4. the grid-connected power generation system that makes up power prediction precision as claimed in claim 1, it is characterized in that, described generation of electricity by new energy unit is photovoltaic array, described unit supervisory control system is photovoltaic supervisory control system, and described energy-storage units adopts fuse salt energy storage and described energy storage management system to adopt thermal management systems.
5. the grid-connected power generation system that makes up power prediction precision as claimed in claim 4, is characterized in that, described employing molten salt energy-storage is for adopting the energy storage of 20MW*8h fuse salt energy storage canister.
6. the grid-connected power generation system that makes up power prediction precision as claimed in claim 1, is characterized in that, described generation of electricity by new energy unit is geothermal energy generating set.
7. the grid-connected power generation system that makes up power prediction precision as described in as arbitrary in claim 1-6, it is characterized in that, described numerical weather forecast server, data acquisition server, web server, database server, power prediction server and described energy storage strategic server adopt IBMX3650 type.
8. the grid-connected power generation system that makes up power prediction precision as described in as arbitrary in claim 1-6, is characterized in that, described hardware firewall adopts USG2110-F.
9. the grid-connected power generation system that makes up power prediction precision as described in as arbitrary in claim 1-6, is characterized in that, described reverse isolation device adopts StoneWall2000.
10. a generation of electricity by new energy method that makes up pre-power prediction precision, is characterized in that, comprising:
Obtain ultra-short term predicted power and short-term forecast power;
More described ultra-short term predicted power and short-term forecast power;
When described ultra-short term predicted power is greater than described short-term forecast power, and while meeting charge condition, control energy-storage units and charge; And
When described ultra-short term predicted power is less than described short-term forecast power, and while meeting discharging condition, control energy-storage units and discharge.
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