CN108631322A - Electrical load selectivity off-grid system and method - Google Patents
Electrical load selectivity off-grid system and method Download PDFInfo
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- CN108631322A CN108631322A CN201810502369.0A CN201810502369A CN108631322A CN 108631322 A CN108631322 A CN 108631322A CN 201810502369 A CN201810502369 A CN 201810502369A CN 108631322 A CN108631322 A CN 108631322A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003247 decreasing effect Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000010248 power generation Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a kind of electrical load selectivity off-grid system and methods, including generating set, off-grid controller, carry calculation device and on-load switch, it is integrated with memory, selection circuit and Comparison Circuit in off-grid controller, the generated output of generating set is stored in memory；The N number of load of sequence successively decreased according to the priority level of power supply is respectively N1Load ... NnLoad, the priority level of the power supply of N number of load are stored in memory；N1Load ... NnLoad passes through S respectively1On-load switch ... SnOn-load switch is electrically connected to generating set.Beneficial effects of the present invention are：When the part generating set in multiple generating sets breaks down, when undercapacity, the sequence successively decreased successively according to power supply priority level powers to corresponding carried selective, makes the load selectivity off-grid that do not power；Current fault generator group and load supplying situation in real time, intuitively show by display device.
Description
Technical field
The present invention relates to power supply technique fields, and in particular to a kind of electrical load selectivity off-grid system and method.
Background technology
According to design, the generated outputs of multiple generating sets >=by the load of multiple electric set electric supply, it is each to ensure
Load can work normally.However, reality is after the part generating set failure in multiple generating sets there are causing undercapacity,
The case where all loads can not be driven, will lead to all equal cisco unity malfunctions of load.
Invention content
The purpose of the present invention is to provide a kind of electrical load selectivity off-grid system and methods, to solve existing part
After generating set failure caused by undercapacity the problem of all loads equal cisco unity malfunction.
To achieve the above object, the technical scheme is that
One aspect of the present invention discloses a kind of electrical load selectivity off-grid system comprising generating set, off-grid control
Device, carry calculation device and on-load switch, wherein：
It is integrated with memory, selection circuit and Comparison Circuit in the off-grid controller, hair is stored in the memory
The generated output of motor group；
Load number in the electrical load selectivity off-grid system is N, and N >=2 are successively decreased according to the priority level of power supply
Sequentially N number of load is respectively N1Load ... NnLoad, the priority level of the power supply of N number of load are stored in the memory
It is interior；
N1Load ... NnLoad passes through S respectively1On-load switch ... SnOn-load switch is electrically connected to described
Generating set, the S1On-load switch ... the SnOn-load switch is connect with the selection circuit signal；
N1Load ... NnLoad passes through C respectively1Carry calculation device ... CnCarry calculation device with it is described
Comparison Circuit signal connects, the C1Carry calculation device ... the CnCarry calculation device is respectively used to calculate N1
Load ... NnThe load of load.
Preferably, the generating set is M groups, and M >=2, the electrical load selectivity off-grid system further includes M power generation
Operating states of the units detection switch and M generating set generated output computing device, the generating set condition monitoring are opened
It closes and the motor group generated output computing device is connect with the off-grid controller signals.
Preferably, the off-grid controller is PLC controller.
Preferably, the comparison circuit is LM339 or LM393.
Preferably, the rotation circuit is data selector.
Another aspect of the present invention discloses a kind of electrical load selectivity offline method comprising：
Calculate the generated output of generating set；
The load respectively loaded on power grid is calculated, and each load is added to obtain the loaded total load of institute；
Load is classified according to the power supply priority level of load, it is negative in the electrical load selectivity off-grid system
Load number is N, and N >=2, the N number of load of sequence successively decreased according to the priority level of power supply is respectively N1Load ... NnLoad；
By the load of the generated output of generating set and each load and comparison,
When the generated output of generating set >=total load to all load supplyings；
When the generated output of generating set is less than the total load, it is powered according to the power supply priority level, and
And the sum of the load of the load for the generated output of generating set >=be powered.
Preferably, the generating set is M groups, and M >=2, the electrical load selectivity off-grid system further includes M power generation
Operating states of the units detection switch and M generating set generated output computing device, the generating set condition monitoring are opened
It closes and the motor group generated output computing device is connect with the off-grid controller signals.
The invention has the advantages that：
When the part generating set in multiple generating sets breaks down so that it is loaded total negative that generated output is less than institute
When lotus, that is, when leading to undercapacity, the sequence successively decreased successively according to power supply priority level powers to corresponding carried selective, also
Even if the load that do not power carries out off-grid, to ensure to power, the high load of priority level can work normally, to realize choosing
Selecting property off-grid, to ensure the safety of greater degree load；
By display device, current fault generator group and load supplying situation in real time, intuitively show, are convenient for
Administrative staff understand the failure and load supplying situation of generating set, and directive function is played to work such as subsequent maintenance.
Description of the drawings
Fig. 1 is the circuit diagram of electrical load selectivity off-grid system of the present invention；
Fig. 2 is the control figure of electrical load selectivity off-grid system of the present invention.
Specific implementation mode
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
One aspect of the present invention discloses a kind of electrical load selectivity off-grid system, referring to Fig. 1 and Fig. 2 comprising power generation
Unit, off-grid controller, carry calculation device and on-load switch, wherein：
It is integrated with memory, selection circuit and Comparison Circuit in the off-grid controller, hair is stored in the memory
The generated output of motor group；
Load number in the electrical load selectivity off-grid system is N, and N >=2 are successively decreased according to the priority level of power supply
Sequentially N number of load is respectively N1Load ... NnLoad, the priority level of the power supply of N number of load are stored in the memory
It is interior；
N1Load ... NnLoad passes through S respectively1On-load switch ... SnOn-load switch is electrically connected to described
Generating set, the S1On-load switch ... the SnOn-load switch is connect with the selection circuit signal；
N1Load ... NnLoad passes through C respectively1Carry calculation device ... CnCarry calculation device with it is described
Comparison Circuit signal connects, the C1Carry calculation device ... the CnCarry calculation device is respectively used to calculate N1
Load ... NnThe load of load.
It should be noted that the formulation of above-mentioned power supply priority level is according to for the shadow after the importance of electric loading, power-off
Size etc. is rung to determine, is input in memory by programming after determining.
In addition, C1Carry calculation device ... CnA kind of realization method of carry calculation device is as follows, is born accordingly
Series voltage table and ammeter in load, to detect the real-time voltage and real-time current of corresponding load, the voltage signal and electric current
Signal transmission obtains the product of real-time voltage and real real-time current, as should to off-grid controller and after off-grid controller operation
Locate the real-time load of load, which is dynamic detection, ensures the reliability of system work, it is contemplated that the shadow of supply variation
It rings.
Another aspect of the present invention discloses a kind of electrical load selectivity offline method comprising：
Calculate the generated output of generating set；
The load respectively loaded on power grid is calculated, and each load is added to obtain the loaded total load of institute；
Load is classified according to the power supply priority level of load, it is negative in the electrical load selectivity off-grid system
Load number is N, and N >=2, the N number of load of sequence successively decreased according to the priority level of power supply is respectively N1Load ... NnLoad；
By the load of the generated output of generating set and each load and comparison,
When the generated output of generating set >=total load to all load supplyings；
When the generated output of generating set is less than the total load, it is powered according to the power supply priority level, and
And the sum of the load of the load for the generated output of generating set >=be powered.
When the part generating set in multiple generating sets breaks down so that it is loaded total negative that generated output is less than institute
When lotus, that is, when leading to undercapacity, the sequence successively decreased successively according to power supply priority level powers to corresponding carried selective, also
Even if the load that do not power carries out off-grid, to ensure to power, the high load of priority level can work normally, to realize choosing
Selecting property off-grid, to ensure the safety of greater degree load.
Embodiment 2
On the basis of embodiment 1, the present embodiment further includes such as display screen display device, the display device with it is described
Off-grid controller signals connect.By display device, current fault generator group and load supplying situation are carried out in real time, directly
Display is seen, the failure and load supplying situation of generating set are understood convenient for administrative staff, finger is played to work such as subsequent maintenance
Lead effect.
Embodiment 3
On the basis of embodiment 2, the generating set is M groups, and M >=2, the electrical load selectivity off-grid system is also
Including M generating set condition monitoring switch and M generating set generated output computing device, M generating set operation
State-detection switch respectively the 1st generating set operation detecting switch ... M generating set operation detecting switches, M power generation
Power of the assembling unit computing device is respectively the 1st generating set power computing device and M generating set power computing devices, the hair
Motor group condition monitoring switchs and the motor group generated output computing device is connect with the off-grid controller signals.
Generating set condition monitoring switch is selected and the concatenated ammeter of corresponding generating set herein, when there is electric current
When flowing through generating set, i.e., there is electric current to pass through in ammeter.
In addition, the selection of generating set power computing device and the concatenated voltmeter of corresponding generating set, to detect power generation
Real-time voltage when unit works, the real-time current of corresponding generating set, voltage signal are detected in conjunction with above-mentioned ammeter
After passing to off-grid controller with current signal, by off-grid controller operation, the product of voltage and electric current is obtained to get to generator
The real-time generated output of group, the testing result are dynamic detection, ensure the reliability of system work, it is contemplated that the shadow of supply variation
It rings.
Embodiment 4
On the basis of embodiment 2, the off-grid controller is PLC controller.
Preferably, the comparison circuit is LM339 or LM393.
Preferably, the rotation circuit is data selector.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (8)
1. a kind of electrical load selectivity off-grid system, which is characterized in that including generating set, off-grid controller, carry calculation
Device and on-load switch, wherein：
It is integrated with memory, selection circuit and Comparison Circuit in the off-grid controller, generator is stored in the memory
The generated output of group；
Load number in the electrical load selectivity off-grid system is N, N >=2, the sequence successively decreased according to the priority level of power supply
N number of load is respectively N1Load ... NnLoad, the priority level storage of the power supply of N number of load is in the memory；
N1Load ... NnLoad passes through S respectively1On-load switch ... SnOn-load switch is electrically connected to the power generation
Unit, the S1On-load switch ... the SnOn-load switch is connect with the selection circuit signal；
N1Load ... NnLoad passes through C respectively1Carry calculation device ... CnCarry calculation device is compared with described
Circuit signal connects, the C1Carry calculation device ... the CnCarry calculation device is respectively used to calculate N1It is negative
Carry ... NnThe load of load.
2. electrical load selectivity off-grid system according to claim 1, which is characterized in that the generating set is M groups,
M >=2, the electrical load selectivity off-grid system further include M generating set condition monitoring switch and M generating set
Generated output computing device, generating set condition monitoring switch and the motor group generated output computing device with
The off-grid controller signals connection.
3. electrical load selectivity off-grid system according to claim 1 or 2, which is characterized in that the off-grid controller
For PLC controller.
4. electrical load selectivity off-grid system according to claim 3, which is characterized in that the comparison circuit is
LM339 or LM393.
5. electrical load selectivity off-grid system according to claim 4, which is characterized in that the rotation circuit is data
Selector.
6. electric appliance load selectivity off-grid system according to claim 5, which is characterized in that further include display device, institute
Display device is stated to connect with the off-grid controller signals.
7. a kind of electrical load selectivity offline method, which is characterized in that including：
Calculate the generated output of generating set；
The load respectively loaded on power grid is calculated, and each load is added to obtain the loaded total load of institute；
Load is classified according to the power supply priority level of load, the load number in the electrical load selectivity off-grid system
For N, N >=2, the N number of load of sequence successively decreased according to the priority level of power supply is respectively N1Load ... NnLoad；
By the load of the generated output of generating set and each load and comparison,
When the generated output of generating set >=total load to all load supplyings；
When the generated output of generating set is less than the total load, it is powered according to the power supply priority level, and send out
The sum of the load of the load for the generated output of motor group >=be powered.
8. electrical load selectivity offline method according to claim 7, which is characterized in that the generating set is M groups,
M >=2, the electrical load selectivity off-grid system further include M generating set condition monitoring switch and M generating set
Generated output computing device, generating set condition monitoring switch and the motor group generated output computing device with
The off-grid controller signals connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810502369.0A CN108631322A (en) | 2018-05-23 | 2018-05-23 | Electrical load selectivity off-grid system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011360A (en) * | 2019-03-20 | 2019-07-12 | 新奥（中国）燃气投资有限公司 | Generating set output load method of adjustment and system |
| CN112350307A (en) * | 2020-10-28 | 2021-02-09 | 中国华电科工集团有限公司 | Control method and control device for regional distribution network and computer readable storage medium |
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| CN105939021A (en) * | 2015-12-15 | 2016-09-14 | 国电南瑞科技股份有限公司 | Power grid frequency control method of considering low voltage ride-through capability of fan |
| CN107516904A (en) * | 2017-08-31 | 2017-12-26 | 国电南瑞科技股份有限公司 | A kind of reply power supply off-grid impacts and counted and the accurate duty control method of unit regulating power |
| CN208674875U (en) * | 2018-05-23 | 2019-03-29 | 辛集市澳森钢铁有限公司 | Electrical load selectivity off-grid system |
-
2018
- 2018-05-23 CN CN201810502369.0A patent/CN108631322A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337287A (en) * | 2015-11-16 | 2016-02-17 | 上海电机学院 | Electrical load part unloading method and electrical load part unloading system |
| CN105939021A (en) * | 2015-12-15 | 2016-09-14 | 国电南瑞科技股份有限公司 | Power grid frequency control method of considering low voltage ride-through capability of fan |
| CN107516904A (en) * | 2017-08-31 | 2017-12-26 | 国电南瑞科技股份有限公司 | A kind of reply power supply off-grid impacts and counted and the accurate duty control method of unit regulating power |
| CN208674875U (en) * | 2018-05-23 | 2019-03-29 | 辛集市澳森钢铁有限公司 | Electrical load selectivity off-grid system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011360A (en) * | 2019-03-20 | 2019-07-12 | 新奥（中国）燃气投资有限公司 | Generating set output load method of adjustment and system |
| CN112350307A (en) * | 2020-10-28 | 2021-02-09 | 中国华电科工集团有限公司 | Control method and control device for regional distribution network and computer readable storage medium |
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Address after: 052360 Nan Zhi Qiu Zhao Ma Cun Dong Cun, Xinji City, Shijiazhuang City, Hebei Province Applicant after: Xinji Aosen iron and Steel Group Co.,Ltd. Address before: 052360 Nan Zhi Qiu Zhao Ma Cun Dong Cun, Xinji City, Shijiazhuang City, Hebei Province Applicant before: XINJI AOSEN IRON & STEEL Co.,Ltd. |
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