CN204118760U - A kind of Intelligent active power controller for microgrid - Google Patents

A kind of Intelligent active power controller for microgrid Download PDF

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Publication number
CN204118760U
CN204118760U CN201420652647.8U CN201420652647U CN204118760U CN 204118760 U CN204118760 U CN 204118760U CN 201420652647 U CN201420652647 U CN 201420652647U CN 204118760 U CN204118760 U CN 204118760U
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Prior art keywords
microgrid
active power
power controller
processing unit
data processing
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CN201420652647.8U
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周小波
徐挺挺
雷文
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LINBO TECHNOLOGY GROUP Co Ltd
SHANGHAI ELECTRIC POWER INDUSTRIAL Co Ltd
State Grid Shanghai Electric Power Co Ltd
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LINBO TECHNOLOGY GROUP Co Ltd
SHANGHAI ELECTRIC POWER INDUSTRIAL Co Ltd
State Grid Shanghai Electric Power Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/14District level solutions, i.e. local energy networks

Abstract

The utility model discloses a kind of Intelligent active power controller for microgrid, comprising: on-line monitoring circuit, communication bus, data processing unit, power circuit, human-computer interaction device; Described on-line monitoring circuit is connected with described data processing unit by described communication bus, and described human-computer interaction device is connected with described data processing unit, and described power circuit connects described data processing unit and described human-computer interaction device.Intelligent active power controller for microgrid of the present utility model, for general micro power network, on the basis of control system cost, realize active power controller in system, realize the economic optimization reliability service of microgrid, and control simple and reliable, precision is high, cost is low, highly versatile, easily commercialization, is applicable to various middle-size and small-size microgrid.

Description

A kind of Intelligent active power controller for microgrid
Technical field
The utility model relates to technical field of electric power, is specifically related to a kind of Intelligent active power controller for microgrid.
Background technology
Micro power network is by multiple distributed power source, as wind power system, photovoltaic system, energy storage device, intelligent grid connection switch, power quality controlling device, the electric power networks of the part such as load composition, it can be incorporated into the power networks, by electrical network and distributed energy, load is powered, also can from network operation (islet operation), by energy storage device and distributed power source to system power supply.In micro power network, the electric energy that distributed power source sends preferentially is dissolved by load, therefore improves the utilance of regenerative resource, also improves the ability that electrical network receives regenerative resource.
Because microgrid contains grid-connected with isolated island two kinds of operational modes, in different modes, the energy of powering to load can be different, and due to the access of regenerative resource, along with the difference such as weather, festivals or holidays, the pattern of powering to load is also different, and the meritorious flowing more complicated in microgrid is changeable.Consider numerous influencing factors such as weather, festivals or holidays, regenerative resource characteristic, energy-storage system, electrical network, part throttle characteristics, how both to improve the reliability of power supply, improve again the utilance of regenerative resource, microgrid mixed economy is enable to optimize reliability service, improving the benefit of user, is one of hot issue of modern study.
At present, in large-scale microgrid or part intelligent micro-grid, all creating energy management system of micro-grid, namely by carrying out complex optimum management to the energy of microgrid, enabling microgrid economical operation.But the cost creating EMS is higher, and does not possess versatility, is not easy to realize commercialization.Therefore the occasion higher to microgrid requirement is generally applied to.And in small-sized microgrid, consider Cost Problems, seldom creating EMS, is all wind-powered electricity generation, photovoltaic direct grid-connected mostly.Energy-storage system is just coordinating with photovoltaic system etc. in local, is used for stabilizing the fluctuation of photovoltaic power.Or the isolated operation of energy-storage system system supports the busbar voltage of isolated island microgrid.Gaining merit in this microgrid can not effectively control.
Utility model content
The utility model provides a kind of Intelligent active power controller for microgrid, for solving for general micro power network, on the basis of not obvious raising system cost, realize active power controller in system, realize the problem of the economic optimization reliability service of microgrid.
The Intelligent active power controller for microgrid that the utility model provides, comprising: on-line monitoring circuit, communication bus, data processing unit, power circuit, human-computer interaction device;
Described on-line monitoring circuit is connected with described data processing unit by described communication bus, and described human-computer interaction device is connected with described data processing unit, and described power circuit connects described data processing unit and described human-computer interaction device.
Further, described on-line monitoring circuit comprises: transducer and data acquisition circuit;
Described transducer is located at renewable energy system, energy-storage system, load and/or the point of common coupling in microgrid and is sent pilot signal to described data acquisition circuit, and described data acquisition circuit is sent to described data processing unit after processing pilot signal.
Further, described transducer adopts Hall element.
Further, described communication bus adopts RS485 bus or Ethernet and for bi-directional transfer of data and control signal.
Further, described data processing unit comprises: interconnective DSP unit and ARM unit;
Described DSP unit connects described data acquisition circuit and for the process computing of monitor data, and described ARM unit connects described human-computer interaction device and for human-computer interactive control.
Further, described power circuit adopts power supply adaptor or lithium battery.
Further, described human-computer interaction device comprises touch-screen and/or keyboard.
Further, the Intelligent active power controller for microgrid of the present utility model also comprises: GPS unit;
Described GPS unit connects described data processing unit and for proof time.
Further, described GPS unit connects described ARM unit.
The Intelligent active power controller for microgrid that the utility model provides, for general micro power network, on the basis of control system cost, realize active power controller in system, realize the economic optimization reliability service of microgrid, and control simple and reliable, precision is high, cost is low, highly versatile, easily commercialization, is applicable to various middle-size and small-size microgrid.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings;
Fig. 1 is the structural representation of the Intelligent active power controller for microgrid of the utility model embodiment.
Embodiment:
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the Intelligent active power controller for microgrid of the utility model embodiment, as shown in Figure 1, the Intelligent active power controller for microgrid that the utility model provides comprises: on-line monitoring circuit 1, communication bus 2, data processing unit 3, power circuit 4, human-computer interaction device 5 and GPS unit 6.Described on-line monitoring circuit 1 is connected with described data processing unit 3 by described communication bus 2, described human-computer interaction device 5 is connected with described data processing unit 3, and described power circuit 4 connects described data processing unit 3, described human-computer interaction device 5 and GPS unit 6.
Described on-line monitoring circuit 1 comprises: transducer 11 and data acquisition circuit 12.Described transducer 11 is located at renewable energy system, energy-storage system, load and/or the point of common coupling (PCC) in microgrid and is sent pilot signal to described data acquisition circuit 12, and described data acquisition circuit 12 pairs of pilot signals are sent to described data processing unit 3 after carrying out the process such as analog-to-digital conversion, conditioning filtering.Wherein, renewable energy system comprises: wind power system, photovoltaic system etc.On-line monitoring circuit 1 is functionally mainly divided into power monitoring module and electric energy quality monitoring module.In transducer 11 pairs of microgrids, the relevant parameter such as power, the quality of power supply of regenerative resource system, energy-storage system, load, point of common coupling carries out Real-Time Monitoring, obtains real-time power and power quality data.Wherein, described transducer 11 adopts Hall element, the voltage in Hall element testing circuit and current signal.Described communication bus 2 adopts RS485 bus or Ethernet and for bi-directional transfer of data and control signal, communication bus 2 need possess the ability of two-way communication.
Described data processing unit 3 comprises: interconnective DSP unit 31 and ARM unit 32.Described DSP unit 31 connects described data acquisition circuit 12 and for the process computing of monitor data, specifically refer to for the computing to power, and by intelligent real power control algorithm, calculate and produce the discharge and recharge reference signal of energy-storage system in microgrid, the switching control signal of renewable energy system, and the actuating signal of point of common coupling (PCC) switch, and by the reference signal of active power, control signal, system switching signal etc. sends the appropriate section of microgrid to the energy-storage system in microgrid by communication bus 2, renewable energy system controls.In order to ensure the stability that micro-grid system runs, the communication between intelligent real power control device and microgrid adopts the communication pattern of low frequency, and call duration time can artificially set.Described ARM unit 32 connect described human-computer interaction device 5 and for the calculating in human-computer interactive control with communicate, such as pass through interactive communication, power quality data, power data, control signal state etc. are shown on the touchscreen, derive, in touch-screen, relevant setting can also be carried out to the parameter controlled.
Described power circuit 4 adopts power supply adaptor or lithium battery, also can be configured to power supply adaptor and lithium battery duplicate supply pattern.
Described human-computer interaction device 5 comprises touch-screen and/or keyboard, for the display of system parameter setting, Monitoring Data and control signal, the derivation of data.
Described GPS unit 6 connects described data processing unit 3 and for proof time.Particularly, described GPS unit 6 connects described ARM unit 32.
The operation principle of Intelligent active power controller of the present utility model is:
When first to be undertaken pair by the GPS unit 6 pairs of time, determine the residing time, the different times, intelligent real power control device exports corresponding control strategy.
Such as, control strategy can comprise:
(1) spring and autumn control strategy
Such as, in whole April, the energy output of new forms of energy is the power consumptions being greater than load.In most instances, the load on daytime of every workday maintains 10kW-15kW, and the energy output of new forms of energy is at 40kW-80kW.And load maintains about 2kW at night, the energy output of new forms of energy is at 10kW-20kW.Same statistical property is also applicable to the first tenday period of a month in May, October, and the first tenday period of a month in November.
Therefore, consider energy-storage system and intelligent real power control device to add in system, the control strategy of energy-storage system can be set as: discharge time on daytime is 8 ~ 15 points, and add up to 7 hours, discharge power is 10kW, and discharge 70kWh altogether.Depth of discharge is 14%, and in this situation, load provides primarily of the electric discharge of energy storage, new energy power generation grid-connection.The paddy period in night, energy storage is charged, charge period 22 point ~ 3 point, charge power 15kW, about 5 hours charging intervals.Because the load in night is at about 2kW, therefore, at charge period, wind energy can be dissolved as far as possible.
(2) winter in summer control strategy
Such as, after entering July, along with the rising of temperature, generally there is larger peak value in load daytime on weekdays, and compares rule, and electricity consumption peak value is 300kW-330kW.And new forms of energy energy output by day maintains 40kW-100kW mostly, namely in most instances, the energy output of new forms of energy is the needs for electricity much smaller than load.Night load maintain about 5kW, and wind power generation capacity is mostly 0kW-20kW.
Same characteristic is also applicable to, August, early September, 11 last ten-days period, December.
Therefore, according to the statistical property of above electricity consumption and generating, the discharge and recharge strategy that can obtain energy storage is:
Discharge time on daytime is 8 ~ 15 points, and add up to 7 hours, discharge power is 45kW, and discharge 315kWh altogether.Depth of discharge is 63%, in this situation, load provides primarily of the electric discharge of energy storage and the generating of new forms of energy, unnecessary or the electricity that is less than is by grid balance, in this case, obvious peak clipping effect (peak of power consumption roughly can be reduced to below 200kW) can be played, and the electricity charge of peak period can be saved.The paddy period in night, energy storage is charged, charge period 22 point ~ 5 point, charge power 45kW, about 7 hours charging intervals.Because the load in night is at about 5kW, and the energy output of wind-powered electricity generation is at 0kW-40kW, therefore, at charge period, wind energy can be dissolved as far as possible, plays the effect of filling out paddy.
(3) festivals or holidays control strategy
By data analysis festivals or holidays (81 days) all April to December in 1 year.In festivals or holidays, under most cases, the power consumption difference of load whole day is little, maintains about 2kW-15kW.There is the situation of overtime work in occasional, then the electricity consumption peak value that different seasons occurs is different.
Therefore the strategy can selected in festivals or holidays is:
Consider the situation of overtime work, because the discharge and recharge of energy storage is controlled by the real power control device on upper strata, therefore, respective logic can be added control (priority acccess control) in real power control device, namely priority acccess control interface is added at the human-computer interaction interface of real power control device, if do not work overtime notice, then control according to original setting, if after receiving the overtime work notice of next day, can according to different seasons, the energy storage control strategy of next day is manually set, thus to occurring the control that the situation of overtime work is also gained merit festivals or holidays.
Adopt intelligent real power control device of the present utility model to after active power control effectively in microgrid, the utilization ratio of regenerative resource can be improved greatly, improve the economic optimization serviceability of microgrid.Relative to existing energy management system, patent device controls simple and reliable, and precision is high, and cost is low, highly versatile, easy commercialization, is applicable to various middle-size and small-size microgrid.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.

Claims (9)

1. for an Intelligent active power controller for microgrid, it is characterized in that, comprising: on-line monitoring circuit, communication bus, data processing unit, power circuit, human-computer interaction device;
Described on-line monitoring circuit is connected with described data processing unit by described communication bus, and described human-computer interaction device is connected with described data processing unit, and described power circuit connects described data processing unit and described human-computer interaction device.
2. the Intelligent active power controller for microgrid according to claim 1, is characterized in that, described on-line monitoring circuit comprises: transducer and data acquisition circuit;
Described transducer is located at renewable energy system, energy-storage system, load and/or the point of common coupling in microgrid and is sent pilot signal to described data acquisition circuit, and described data acquisition circuit is sent to described data processing unit after processing pilot signal.
3. the Intelligent active power controller for microgrid according to claim 2, is characterized in that, described transducer adopts Hall element.
4. the Intelligent active power controller for microgrid according to claim 2, is characterized in that, described communication bus adopts RS485 bus or Ethernet and for bi-directional transfer of data and control signal.
5. the Intelligent active power controller for microgrid according to claim 2, it is characterized in that, described data processing unit comprises: interconnective DSP unit and ARM unit;
Described DSP unit connects described data acquisition circuit and for the process computing of monitor data, and described ARM unit connects described human-computer interaction device and for human-computer interactive control.
6. the Intelligent active power controller for microgrid according to claim 2, is characterized in that, described power circuit adopts power supply adaptor or lithium battery.
7. the Intelligent active power controller for microgrid according to claim 2, it is characterized in that, described human-computer interaction device comprises touch-screen and/or keyboard.
8. the Intelligent active power controller for microgrid according to claim 1-7 any one, is characterized in that, also comprise: GPS unit;
Described GPS unit connects described data processing unit and for proof time.
9. the Intelligent active power controller for microgrid according to claim 8, is characterized in that, described GPS unit connects described ARM unit.
CN201420652647.8U 2014-11-03 2014-11-03 A kind of Intelligent active power controller for microgrid Active CN204118760U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901422A (en) * 2015-06-18 2015-09-09 安徽贵博新能科技有限公司 Photovoltaic intelligent microgrid management system based on DSP and ARM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901422A (en) * 2015-06-18 2015-09-09 安徽贵博新能科技有限公司 Photovoltaic intelligent microgrid management system based on DSP and ARM

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