CN106385049A - Wind-photovoltaic-energy storage complementary microgrid energy storage current converter comprehensive control method - Google Patents
Wind-photovoltaic-energy storage complementary microgrid energy storage current converter comprehensive control method Download PDFInfo
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- CN106385049A CN106385049A CN201610871937.5A CN201610871937A CN106385049A CN 106385049 A CN106385049 A CN 106385049A CN 201610871937 A CN201610871937 A CN 201610871937A CN 106385049 A CN106385049 A CN 106385049A
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- current converter
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- energy accumulation
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004146 energy storage Methods 0.000 title claims abstract description 9
- 230000000295 complement effect Effects 0.000 title abstract 2
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims description 27
- 230000005611 electricity Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H02J3/383—
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a wind-photovoltaic-energy storage complementary microgrid energy storage current converter comprehensive control method. Filtering is performed by using a first-order low-pass filtering method, output power of distributed power supplies is sampled firstly so that primary sampling values are obtained, and filtering is performed by using a first-order low-pass filter so that primary filtering output values are obtained; then the output power of the distributed power supplies is sampled so that secondary sampling values are obtained, filtering is performed by using the first-order low-pass filter so that secondary filtering output values are obtained, and the primary filtering output values and the secondary filtering output values are weighted so that effective filtering values are obtained; therefore, the output power of the distributed power supplies is sampled and filtered in real time in the same manner. The unbalanced power of the distributed power supplies can be suppressed so that the influence of accessing of the distributed power supplies on a power grid can be reduced, control of microgrid energy dispatching can be realized, and the microgrid operation technical indicators, stability and economic efficiency can be enhanced.
Description
Technical field
The invention belongs to the Comprehensive Control side of micro-capacitance sensor technical field, more particularly, to wind-light storage complementation micro-capacitance sensor energy accumulation current converter
Method.
Background technology
Distributed electrical source device (Distributed Generation) refers to that power is thousands of watts to 50MW small modules
Formula and environmental compatible independent current source.These power supplys are owned by power department, power consumer or the 3rd side, in order to meet electric power
System and user specifically require.Such as peak regulation, it is outlying user or shopping centre and residential block powers, save power transmission and transformation investment, carry
High power supply reliability etc..
Micro-capacitance sensor refers to by distributed unit, energy-storage units, energy conversion unit, associated loadings and monitoring, protection location
The small-sized electric system collected.Micro-capacitance sensor is an autonomous system that can realize self-contr ol, protection and management, its
Itself it is exactly a complete power system, rely on the control of itself and management to supply to enable power-balance control, system operation
The function of the aspects such as optimization, default detection and protection, power quality controlling.
The main running status of of micro-capacitance sensor is that it is incorporated into the power networks with electrical network, and no matter which kind of state micro-capacitance sensor operates in,
Its energy source is nothing but solar electrical energy generation, wind-power electricity generation distributed supply unit.Because natural wind speed and solar radiation are strong
There is randomness, intermittent and seasonal distinguishing feature in degree, and the power output of wind energy turbine set, photovoltaic plant depends primarily on
Natural wind speed and solar radiation quantity, therefore wind energy turbine set, the power output of photovoltaic plant are always in dynamic changing process, in pole
Under the weather conditions at end, power output occurs very big fluctuation.Power output change can cause microgrid bus and neighbouring electrical network
Voltage pulsation, frequency change, the power supply quality of impact electrical network, therefore the power output of photovoltaic, wind-powered electricity generation is carried out with smooth seeming
Extremely important, adjust electrical network electricity consumption peak-valley difference and improve micro-capacitance sensor economy also essential.
Content of the invention
Goal of the invention：In order to solve the problems, such as prior art, the power output of smooth micro-capacitance sensor, improve the confession of electrical network
Electricity quality, the present invention provides a kind of integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter.
Technical scheme：A kind of integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter, using first-order low-pass
The power output of the distributed power source to energy accumulation current converter for the ripple method is filtered, including step：
(1) power output of distributed power source is sampled, obtain a sampled value, filtered by low-pass first order filter
Ripple, obtains a filtering output value；
(2) power output of distributed power source is sampled, obtain double sampling value, filtered by low-pass first order filter
Ripple, obtains secondary filtering output valve；
(3) a described filtering output value is weighted with secondary filtering output valve, obtains effective filter value, filtering system
Number is corresponding with the time constant of low-pass first order filter, determines secondary filtering output valve in effective filter value according to filter factor
In shared weight；
(4) repeat step (1), to step (3), is sampled to the power output of distributed power source in real time and is filtered.
Beneficial effect：The invention discloses a kind of integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter, adopt
It is filtered with the power output of the distributed power source to energy accumulation current converter for the first-order low-pass ripple method, stabilize distributed power source not
Balance power, high density of dissolving distribution accesses distributed power source and exerts oneself fluctuation, reduces distributed power source and accesses the shadow to electrical network
Ring, the equivalent needs meeting the control to high density distributed power source for higher level's electrical network realization, improve micro-capacitance sensor running technology and refer to
Mark, stability and economy.
Brief description
Fig. 1 is the integrated control method schematic diagram of wind-light storage complementation micro-capacitance sensor energy accumulation current converter of the present invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
The integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter includes the distribution based on first-order low-pass ripple method
Formula power smooths control, the distributed power source power smooth of moving average method controls, the peak load shifting based on tou power price
Power smooth controls, the battery SOC feedback control Ji Yu battery pack residual capacity (SOC) and the dead band based on battery protection are controlled
System.Stabilize the imbalance power of distributed power source as far as possible, high density of dissolving distribution accesses distributed power source and exerts oneself fluctuation, real
Existing distributed power source exert oneself from smooth, reduce distributed power source and access impact to electrical network, equivalent meet higher level's electrical network and realize
Needs to the control of high density distributed power source；Meet and improve micro-capacitance sensor economy；Meet battery performance protection.It realizes tool
Body includes herein below：
1st, using first-order low-pass ripple method, the power output of the distributed power source to energy accumulation current converter is filtered, including step
Suddenly：
(1) power output of distributed power source is sampled, obtain a sampled value, filtered by low-pass first order filter
Ripple, obtains a filtering output value；
(2) again the power output of distributed power source is sampled, obtain double sampling value, carried out by low-pass first order filter
Filtering, obtains secondary filtering output valve；
(3) a described filtering output value is weighted with secondary filtering output valve, obtains effective filter value so that defeated
Go out and have feedback effect to input.Filter factor is corresponding with the time constant of low-pass first order filter, is determined according to filter factor
The shared weight in effective filter value of secondary filtering output valve, filter factor is less, and filter result is more steady, but sensitivity
Lower；Filter factor is bigger, and sensitivity is higher, but filter result is more unstable.During practical application, to consider, choose
Suitable value；
(4) repeat step (1), to step (3), is sampled to the power output of distributed power source in real time and is filtered.
Power output using this distributed power source to energy accumulation current converter for first-order low-pass ripple method is filtered, and stabilizes point
The imbalance power of cloth power supply, high density of dissolving distribution accesses distributed power source and exerts oneself fluctuation, reduces distributed power source and connects
Enter the impact to electrical network, the equivalent needs meeting the control to high density distributed power source for higher level's electrical network realization.
2nd, the distributed power source power smooth adopting moving average method controls：
Power output real-time sampling to distributed power source, by regarding team using glide filter algorithm as sampled data
Row, if the length of queue is n, n value is set by user oneself.Sample new data every time, sampled result is put into tail of the queue, delete
Except the data of original head of the queue, when having the data of n " up-to-date " to calculate in hold queue all the time, sampling number n number decide
Filter effect, 1/n can regard the factor of influence to result for each sampled value as.Very little, factor of influence is big for sampling number, smooths
Effect is poor；Number of times is too many, and factor of influence is little, and sensitivity declines, insensitive to the variation tendency of parameter.By observing different n values
The average output of lower slider responds to choose n value, both to take the sampling time less, can reach best filter effect again.
3rd, utilize energy-storage system energy supply, the power output of distributed power source compensated, obtains smooth power output,
Reach the imbalance power stabilizing distributed power source further, the distributed power source output power ripple that high density of dissolving distribution accesses
The mesh of dynamic property.
Power smooth based on moving average method controls and the power output of distributed power source is compensated, Ke Yijin
One step suppresses the imbalance power of distributed power source, and the distributed power source that high density of dissolving distribution accesses is exerted oneself fluctuation, realizes
It is certainly smooth that distributed power source is exerted oneself, and reduces distributed power source further and accesses the impact to electrical network.
4th, adopt peak load shifting to control, store electric energy when load valley electricity price is relatively low, when load peak electricity price is higher
Release electric energy.By peak load shifting control, it is possible to reduce the electric energy that user absorbed from electrical network in the load peak period, these electric energy
Can supplement in the low price period, cost when price difference therein can be built with balancing battery energy-storage system again, improve micro-capacitance sensor fortune
The economy of row.
5th, energy-storage system power instruction be likely to appear in positive and negative between frequently change, lead to energy accumulation current converter charge/
Frequent switching between discharge condition, easily causes the infringement to energy accumulation current converter and battery itself, can have selection in the controlling
Property the broad-adjustable dead zone function of addition, that is, in dead zone range, keep energy accumulation current converter working condition constant, it is to avoid frequently
Numerous switching, protects energy accumulation current converter.
6th, the charging and discharging capabilities that battery remaining power can provide when different are also different, therefore add battery SOC feedback
Control, battery SOC feedback control is adjusted to energy accumulation current converter power output according to battery remaining power, by adjusting gain
Size adjusting SOC feedback control ratio, to meet the needs of actual control.
Relatively independent between each part, can switching can also work respectively, to realize microgrid energy scheduling simultaneously
Comprehensive Control, make micro-capacitance sensor possess multiple control function, so that micro-capacitance sensor is run more economically reasonable, improve micro-capacitance sensor and run
Technical indicator, stability and economy.
Claims (6)
1. a kind of integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter is it is characterised in that adopt first-order low-pass
The power output of the distributed power source to energy accumulation current converter for the ripple method is filtered, including step：
(1) power output of distributed power source is sampled, obtains a sampled value, be filtered by low-pass first order filter,
Obtain a filtering output value；
(2) power output of distributed power source is sampled, obtains double sampling value, be filtered by low-pass first order filter,
Obtain secondary filtering output valve；
(3) a described filtering output value is weighted with secondary filtering output valve, obtains effective filter value, filter factor with
The time constant of low-pass first order filter is corresponding, determines secondary filtering output valve institute in effective filter value according to filter factor
The weight accounting for；
(4) repeat step (1), to step (3), is sampled to the power output of distributed power source in real time and is filtered.
2. wind-light storage according to claim 1 complementation micro-capacitance sensor energy accumulation current converter integrated control method it is characterised in that
Also include being filtered using moving average method, set the queue as n for the queue length, sampled value is put into team from tail of the queue
Row, delete from head of the queue.
3. the integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter according to claim 1 and 2, its feature exists
In, also include microgrid power smooth control, using energy-storage system energy supply, the power output of distributed power source compensated,
Obtain smooth power output.
4. the integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter according to claim 1 and 2, its feature exists
In, also include peak load shifting control, store electric energy when load valley electricity price is relatively low, the release electricity when load peak electricity price is higher
Energy.
5. the integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter according to claim 1 and 2, its feature exists
In, add broad-adjustable dead zone function during controlling energy accumulation current converter, in dead zone range, holding energy accumulation current converter
Working condition constant.
6. the integrated control method of wind-light storage complementation micro-capacitance sensor energy accumulation current converter according to claim 1 and 2, its feature exists
In also including battery SOC feedback control, according to battery remaining power, the power output of energy accumulation current converter be adjusted, pass through
The gain-adjusted battery SOC feedback control ratio of energy accumulation current converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610871937.5A CN106385049A (en) | 2016-09-30 | 2016-09-30 | Wind-photovoltaic-energy storage complementary microgrid energy storage current converter comprehensive control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003273A (en) * | 2020-08-12 | 2020-11-27 | 杭州海兴泽科信息技术有限公司 | Control method for power of photovoltaic grid-connected system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030090155A1 (en) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Electric power system interconnection device |
| CN104659811A (en) * | 2015-01-28 | 2015-05-27 | 东南大学 | Distributed cooperative control method of micro power grid on basis of holdback |
| CN105576686A (en) * | 2016-02-23 | 2016-05-11 | 北京慧峰聚能科技有限公司 | Energy management method using smooth microgrid interconnection point power fluctuation of energy storage system |
| CN105680486A (en) * | 2014-11-18 | 2016-06-15 | 国家电网公司 | Smooth output method of wind-power combined power generation system |
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2016
- 2016-09-30 CN CN201610871937.5A patent/CN106385049A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030090155A1 (en) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Electric power system interconnection device |
| CN105680486A (en) * | 2014-11-18 | 2016-06-15 | 国家电网公司 | Smooth output method of wind-power combined power generation system |
| CN104659811A (en) * | 2015-01-28 | 2015-05-27 | 东南大学 | Distributed cooperative control method of micro power grid on basis of holdback |
| CN105576686A (en) * | 2016-02-23 | 2016-05-11 | 北京慧峰聚能科技有限公司 | Energy management method using smooth microgrid interconnection point power fluctuation of energy storage system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003273A (en) * | 2020-08-12 | 2020-11-27 | 杭州海兴泽科信息技术有限公司 | Control method for power of photovoltaic grid-connected system |
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Application publication date: 20170208 |
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