CN103515980A - Energy management method for micro-grid containing ground source heat pump - Google Patents
Energy management method for micro-grid containing ground source heat pump Download PDFInfo
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Abstract
The invention discloses an energy management method for a micro-grid containing a ground source heat pump. The method includes time-scale modes of a day-ahead control plan and a real-time correction control, and different strategies can be developed according to multiple optimization objective and multiple constraint conditions. The method comprises the first step of developing a day-ahead scheduling control strategy according to photovoltaic power generation curves and load daily prediction curves, and the second step of correcting daily scheduling schemes developed by the day-ahead scheduling control according to the current real-time running conditions and the current energy storage state of a system. According to the method, the energy management of the micro-grid containing the ground source heat pump can be optimized in a multiple-time-scale mode; a system running controller executes all the optimal control and energy management sub-policies by combining with the current real-time running state of the system according to the dispatching commands of a monitoring system. According to the energy management method for the micro-grid energy containing the ground source heat pump, the running reliability of the micro-grid containing the ground source heat pump can be effectively improved, and the impact on the micro-grid in the start-up process of the ground source heat pump can be lowered.
Description
Technical field
The invention belongs to renewable energy power generation and micro-power grid application technical field, relate to a kind of microgrid energy management control method, relate in particular to the micro-electrical network Multiple Time Scales energy management method containing earth source heat pump.
Background technology
Along with the approach exhaustion of fossil fuel and increasingly sharpening of environmental pollution, distributed power generation has obtained application more and more widely.Micro-electrical network effectively integrates distributed power generation, energy storage, load by control device, for the utilization of distributed generation technology provides flexibly, platform efficiently, obtained in recent years common concern.
The EMS of micro-electrical network is the basis of realizing micro-power grid operation.Microgrid energy management system is by gathering the real-time running data of micro-electrical network, according to the operation control strategy of formulating, assign control command to each part of micro-electrical network, thereby guarantee the safe and stable operation of micro-electrical network, realize the coordinated operation of distributed power generation, energy storage, load and the coordinated operation of micro-electrical network and power distribution network.
Containing micro-electrical network of earth source heat pump, due to the complicated particularity of its load, so its energy management method also must carry out particular design.Earth source heat pump is a kind of highly effective energy-conserving environmental-protecting type air-conditioning system of utilizing underground shallow layer geothermal resources can heat supply can freeze again, its electric current when starting can reach 4～7 times of rated current, can produce certain impact to electrical network, especially at micro-electrical network during from network operation.If when starting, earth source heat pump does not carry out management and control, can cause micro-grid power concussion, electrical network is lost stable, not only can not successfully start living load, also likely cause micro-mains breakdown.
In order to guarantee the micro-power grid operation containing earth source heat pump, reduce the adverse effect that it brings power distribution network, and guarantee that it can start successfully when from net, must design for the microgrid energy management method containing earth source heat pump.
Application number is that 201110191474.5 Chinese patent " the energy-optimised dispatching method of micro-electrical network Multiple Time Scales under independent operation mode " has provided the energy-optimised dispatching method of micro-electrical network Multiple Time Scales under a kind of independent operation mode, the economical operation of micro-electrical network is divided into plan and two stages of Real-Time Scheduling a few days ago, at programming phase a few days ago, 24 periods will be divided into a dispatching cycle, based on prediction data a few days ago, set up Unit commitment computation model a few days ago; In the Real-Time Scheduling stage; the startup-shutdown result of plan a few days ago will be followed; based on real time ultra-short term prediction data; and the energy state of Real-Time Monitoring energy-storage units; different energy-optimised according to taking between net load size and the residing different-energy of energy-storage units state area; to determine the active power dispatch command of the micro-power supply of each controllable type, off-load power instruction and cutting load instruction.But the control method that this patent proposes only limits to micro-electrical network independent operating situation, does not comprise that micro-electrical network is incorporated into the power networks; And the micro-network load in this patent is conventional load, be not the rotary load containing earth source heat pump class as herein described, the rush of current situation while not existing micro-electrical network to start from net, therefore its control mode is also comparatively simple.
Summary of the invention
The object of this invention is to provide a kind of microgrid energy management method containing earth source heat pump, make micro-electrical network can be when earth source heat pump starts and all keeping system stable operation during normal operation.
To achieve these goals, the present invention adopts following technical scheme, and it comprises the following steps:
1) gather micro-electrical network weather information data and information on load data, the historical solar energy/wind energy/load of comprehensive micro-operation of power networks carries out the prediction of following a day, obtains solar energy/wind energy/load prediction data of micro-electrical network in following a day;
2) consider exert oneself restriction and the running status of each equipment component in micro-electrical network, solar energy/wind energy/load prediction data based on micro-electrical network in one day future in step 1) are formulated the energy management plan of distributed power source, energy storage and load in second day micro-electrical network of 24 hours, and within one day, are handed down to microgrid energy management system in advance;
3) micro-electrical network is carried out the energy management plan of formulating the previous day, and real-time monitoring system ruuning situation and energy storage state, determines whether to meet the energy management plan of formulating the previous day, as met, continues to carry out; If do not meet, revise according to actual operating state;
4) according to step 3), obtain the control command containing micro-electrical network of earth source heat pump, be distributed to adjustable distributed power source, energy storage device and load governor in micro-electrical network, make micro-electrical network in next period according to the energy management plan stable operation of formulating.
The beneficial effect that the present invention reaches:
Method of the present invention is divided into two parts by the energy management of micro-electrical network: control plan a few days ago and in real time Correction and Control, and the control plan a few days ago of long time scale can reduce earth source heat pump and start the impact to micro-electrical network, guarantees the safe and stable operation of system; Correction and Control has been considered the micro-electrical network real time execution situation containing earth source heat pump in real time, has taken into account fail safe and the stability of micro-operation of power networks.
Accompanying drawing explanation
Fig. 1 is the microgrid energy management control method FB(flow block) that the present invention contains earth source heat pump;
Fig. 2 is micro-grid system schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
According to controlling type, the present invention is divided three classes the power supply in micro-electrical network: adjustable distributed power source, unadjustable distributed power source and energy storage.Wherein adjustable distributed power source comprises gas turbine, photovoltaic generation etc. that can linear regulation power output; Unadjustable distributed power source comprises as wind power generation etc.
As shown in Figure 1, the Multiple Time Scales energy management method implementation step of the micro-electrical network containing earth source heat pump of the present invention is as follows:
1, gather micro-network load information data, weather information data, the historical data of comprehensive micro-operation of power networks, carries out the prediction of following a day to load/wind energy/solar energy, obtain load/wind energy/solar energy prediction data of 24 hours micro-electrical networks in following a day.Be divided into a plurality of periods by one day, wherein prediction data comprises:
(1) short-term of (second day) whole day distributed power source of the 24 hours predicted value curve of exerting oneself in the future scheduling cycle, comprises P
cirepresent adjustable distributed power source power output of i period, P
uCirepresent unadjustable distributed power source power output of i period);
(2) 24 hours Short Term Load curve (P of (second day) whole day in the future scheduling cycle
lDirepresent the i period consumed power of loading);
(3) the corresponding maximum possible constantly of energy storage discharges and recharges power (P
bicmaxirepresent the maximum discharge power of i period energy storage, P
bcmaxirepresent i period energy storage maximum possible charge power, positive number represents energy storage electric discharge, negative number representation energy storage charging).
2, in conjunction with the limited case of exerting oneself of each equipment component in the operation plan of future scheduling 24 hours power distribution networks of (second day) whole day in the cycle and micro-electrical network, formulate the operational plan of each adjustable distributed power source of micro-electrical network, load and energy storage a few days ago.
3, microgrid energy management system receives the governing plan of microgrid energy a few days ago that power distribution network issues, and in the different periods, according to this plan, carries out energy management plan, guarantees the safe and stable operation of micro-electrical network.
4,, in the regulating cycle of setting, microgrid energy management system, by the operation conditions of the micro-electrical network of monitoring, contrasts itself and control plan a few days ago, judges whether the current real-time running status of micro-electrical network meets the requirement of EMS.
If 5 current micro-operation of power networks situations meet EMS demand, illustrate in this regulating cycle and do not need by the power output of each distributed power source and energy storage in the micro-electrical network of energy management strategy adjustment.Wait for after this regulating cycle finishes and enter next regulating cycle.
If 6 current micro-operation of power networks situations do not meet EMS demand, calculate prediction data in step 1 and the difference of real time data, formulate the real-time Correction and Control strategy of micro-electrical network.
7, microgrid energy management system, by real-time Correction and Control policy distribution to each adjustable distributed power source, energy storage and load, is realized the adjusting of power, to reach scheduling requirement by relative control apparatus.
8, wait for after this regulating cycle finishes and enter next regulating cycle.
Embodiment:
Consider micro-electrical network as shown in Figure 2, micro-electrical network contains photovoltaic generating system, storage battery, super capacitor, earth source heat pump, alternating-current charging pile and illumination.Wherein photovoltaic generating system is adjustable distributed power source; Energy storage device comprises storage battery and super capacitor, and storage battery provides long energy supply, and super capacitor provides powerful energy in short-term; Load is earth source heat pump, alternating-current charging pile and illumination.Storage battery energy is divided between state area: SOC
max=0.8, SOC
max=0.2; Adopt the present invention to carry out energy management to the micro-electrical network containing earth source heat pump.
1, gather micro-network load information data, weather information data, the historical data of comprehensive micro-operation of power networks, carries out the prediction of following a day to load/solar energy, obtain load/solar energy prediction data of 24 hours micro-electrical networks in following a day.
2, take 1 hour as a period, the following intraday ruuning situation of micro-electrical network is divided into 24 periods, micro-electrical network 24 hour operation cost of take is target function, consider the restriction of exerting oneself of the inner day part energy balance of micro-electrical network, each equipment component, based on the Sino-Japan preload/solar energy of step 1 prediction data, the operational plan scheme of day part photovoltaic generating system, energy-storage system and load will be obtained.
3, in micro-electrical network real time execution process, take every 20 minutes as a cycle of operation, be about to 3 the operation periods that are divided into per hour, whole day is divided into nT=24*3=72 plan operation period, in each scheduling, constantly monitors the power output of photovoltaic generating system, the energy state SOC of energy-storage units and exert oneself size and load condition.
4, the ruuning situation of photovoltaic generating system, energy-storage system and load in the real-time micro-grid system obtaining according to step 3, the operational plan a few days ago obtaining with step 2 contrasts, obtain the operation difference of each equipment component, set up optimized operation model, by solving the micro-economy operation of power grid scheme that obtains this period.
5, the micro-economy operation of power grid scheme obtaining according to step 4 forms micro-operation of power networks instruction, is distributed to adjustable distributed power source, energy storage device and load in micro-electrical network, make micro-electrical network in next period according to specific mode safe operation.
6, in next scheduling constantly, judge whether to reach the 24th period, if not, repeating step 4, and if so, repeating step 1.
Finally it should be noted that: above embodiment is only in order to technical scheme of the present invention to be described but not be limited, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the art is to be understood that: it still can be modified or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme depart from the spirit and scope of technical solution of the present invention.
Claims (6)
1. containing a microgrid energy management method for earth source heat pump, it is characterized in that: comprise the following steps:
1) first by gathering micro-network load information data and weather information data, comprehensive micro-electrical network history data, solar energy/wind energy/load is carried out to the prediction of following a day, obtain micro-electrical network in the prediction data of the future scheduling whole day distributed power source of 24 hours, energy storage and load in the cycle, in conjunction with the operation plan of future scheduling 24 hours power distribution networks of whole day in the cycle, formulate the energy management plan of micro-electrical network a few days ago again;
2) consider exert oneself restriction and the running status of each equipment component in micro-electrical network, solar energy/wind energy/load prediction data based on micro-electrical network in one day future in step 1) are formulated the energy management plan of distributed power source, energy storage and load in second day micro-electrical network of 24 hours, and within one day, are handed down to microgrid energy management system in advance;
3) micro-electrical network is carried out the energy management plan of formulating the previous day, and real-time monitoring system ruuning situation and energy storage state, determines whether to meet the energy management plan of formulating the previous day, if meet, continues to carry out; If do not meet, revise according to actual motion control strategy;
4) according to step 3), obtain the dispatch command containing micro-electrical network of earth source heat pump, be distributed to adjustable distributed power source, energy storage device and load governor in micro-electrical network, make micro-electrical network in next period according to the energy management plan stable operation of formulating.
2. the microgrid energy management method containing earth source heat pump according to claim 1, is characterized in that: the prediction data of described micro-electrical network comprises:
In the future scheduling cycle, the predicted value curve of exerting oneself of the whole day distributed power generation of 24 hours, comprises i period adjustable distributed power source power output P
ci, i period unadjustable distributed power source power output P
uCi;
24 hours Short Term Load curves of whole day in the future scheduling cycle, comprise the i period consumed power P that loads
lDi;
The corresponding maximum possible constantly of energy storage discharges and recharges power, comprises the maximum discharge power P of i period energy storage
bicmaxi, i period energy storage maximum possible charge power P
bcmaxi.
3. the microgrid energy management method containing earth source heat pump according to claim 1, it is characterized in that: in described step 3), in the regulating cycle of setting, described microgrid energy management system, by the ruuning situation of adjustable distributed power source, energy storage and load in the micro-electrical network of monitoring, is obtained the current real-time ruuning situation of micro-electrical network; The energy management plan that the current real-time real time execution situation of micro-electrical network and power distribution network are issued contrasts, and judges whether the current real-time ruuning situation of micro-electrical network meets the requirement of microgrid energy governing plan.
4. the microgrid energy management method containing earth source heat pump according to claim 3, is characterized in that:
If the current real-time ruuning situation of micro-electrical network meets energy management plan a few days ago, wait for after this regulating cycle finishes and enter next regulating cycle;
When if the current real-time ruuning situation of micro-electrical network does not meet a few days ago EMS requirements of plan, calculate the difference of prediction data and real time data, formulate the real-time Correction and Control strategy of micro-electrical network, reach energy management requirements of plan.
5. the microgrid energy management method containing earth source heat pump according to claim 4, is characterized in that: described microgrid energy management system regulates the step of each output power of power supply in micro-electrical network to be:
According to the Power Limitation situation of micro-electrical network real time execution situation and each device, formulate the real-time Correction and Control strategy of micro-electrical network;
The real-time Correction and Control of micro-electrical network is required to be issued to adjustable distributed power source in micro-electrical network, energy storage and adjustable load, by corresponding control device, realized the adjusting of power output.
6. according to the microgrid energy management method containing earth source heat pump described in right 5, it is characterized in that: described microgrid energy management system is in regulating micro-electrical network during each output power of power supply, according to the adjustable distributed power source of preferential adjusting, regulate energy storage, this sequentially carries out finally to regulate load and the unadjustable distributed power source of switching again.
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| CN104899790A (en) * | 2014-03-07 | 2015-09-09 | 国网上海市电力公司 | Energy management method in energy storage system in micro-grid |
| CN106203745A (en) * | 2016-08-19 | 2016-12-07 | 国电南瑞科技股份有限公司 | Distributed photovoltaic control system based on the many spaces of Multiple Time Scales and control method |
| CN109004682A (en) * | 2017-12-05 | 2018-12-14 | 江苏大航电子商务有限公司 | A kind of intelligent micro-grid |
| CN110998643A (en) * | 2017-07-21 | 2020-04-10 | 道达尔太阳能国际公司 | System, apparatus, and method for pattern-based energy storage management |
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| EP2437372A2 (en) * | 2010-10-04 | 2012-04-04 | The Boeing Company | Smart microgrid |
| CN102684199A (en) * | 2012-06-05 | 2012-09-19 | 国电南瑞科技股份有限公司 | Multiple time scale control method of exchange power of microgrid and power distribution network |
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| EP2437372A2 (en) * | 2010-10-04 | 2012-04-04 | The Boeing Company | Smart microgrid |
| CN102289566A (en) * | 2011-07-08 | 2011-12-21 | 浙江大学 | Multiple-time-scale optimized energy dispatching method for micro power grid under independent operation mode |
| CN102684199A (en) * | 2012-06-05 | 2012-09-19 | 国电南瑞科技股份有限公司 | Multiple time scale control method of exchange power of microgrid and power distribution network |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104899790A (en) * | 2014-03-07 | 2015-09-09 | 国网上海市电力公司 | Energy management method in energy storage system in micro-grid |
| CN106203745A (en) * | 2016-08-19 | 2016-12-07 | 国电南瑞科技股份有限公司 | Distributed photovoltaic control system based on the many spaces of Multiple Time Scales and control method |
| CN110998643A (en) * | 2017-07-21 | 2020-04-10 | 道达尔太阳能国际公司 | System, apparatus, and method for pattern-based energy storage management |
| CN110998643B (en) * | 2017-07-21 | 2024-05-10 | 道达尔太阳能国际公司 | Systems, devices, and methods for pattern-based energy storage management |
| CN109004682A (en) * | 2017-12-05 | 2018-12-14 | 江苏大航电子商务有限公司 | A kind of intelligent micro-grid |
| CN109004684A (en) * | 2017-12-05 | 2018-12-14 | 江苏大航电子商务有限公司 | Electric power measuring and calculating and regulating system |
| CN109004685A (en) * | 2017-12-05 | 2018-12-14 | 江苏大航电子商务有限公司 | Micro-grid system |
| CN109004683A (en) * | 2017-12-05 | 2018-12-14 | 江苏大航电子商务有限公司 | A kind of micro-grid system |
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