CN104659801A - Method for acquiring motor with smooth power - Google Patents
Method for acquiring motor with smooth power Download PDFInfo
- Publication number
- CN104659801A CN104659801A CN201510123042.9A CN201510123042A CN104659801A CN 104659801 A CN104659801 A CN 104659801A CN 201510123042 A CN201510123042 A CN 201510123042A CN 104659801 A CN104659801 A CN 104659801A
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- power
- energy storage
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- storage system
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004146 energy storage Methods 0.000 claims abstract description 60
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 12
- 229910001416 lithium ion Inorganic materials 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- 238000004153 renaturation Methods 0.000 claims description 9
- 238000009499 grossing Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000036541 health Effects 0.000 abstract description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000010248 power generation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- H02J3/386—
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a method for acquiring a motor with smooth power. The method comprises the following steps: (1) measuring an output target value of a wind generation set with smooth power; (2) acquiring a compensation target value of a hybrid energy storage system according to the difference between the output target value and an actual output power of a fan; (3) dividing the compensation target value of the hybrid energy storage system according to vibration frequency; and (4) controlling the hybrid energy storage system to receive and send pointed power according to the compensation target value of the hybrid energy storage system so as to effectively stabilize power fluctuation of the fan. By virtue of a low-pass power filter algorithm based on multi-time scales, designed by the invention, battery health management requirements of charge states of different energy storage batteries can be combined, and the charge states of the energy storage batteries can be stabilized in a normal range of the battery health management requirements when high frequency components of the power fluctuation are filtered.
Description
Technical field
The present invention relates to a kind of blower fan, specifically relate to a kind of method that acquisition has the blower fan of smooth power.
Background technology
Wind power generation is because its spatter property and economy are considered to the most potential energy in future, but because wind energy is a kind of intermittent energy source and forecasting wind speed exists certain error, therefore the power output of wind generator system can fluctuate along with the change of wind speed, has randomness and intermittent characteristic.In order to reduce the impact of wind power generation on local electrical network, the active power of the output of wind power generation must be made level and smooth.Method conventional at present in wind generator system, is incorporated to battery energy storage system to stabilize the fluctuation of wind power generation active power of output, thus the active power realizing wind generator system output is level and smooth.Although energy storage device can play the effect suppressing regenerative resource output-power fluctuation to a certain extent, but due to the limitation of current battery technology, be difficult to the requirement simultaneously meeting life-span and cost two aspect with single energy storage device, to this, the power smooth method of research mixed energy storage system is significantly.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of method that acquisition has the blower fan of smooth power.The output of liquid stream and lithium ion two kinds of battery energy storage system access blower fans, devise the power filter algorithm based on Multiple Time Scales, can in conjunction with the battery health regulatory requirement of two kinds of energy-storage battery state-of-charges, while filtering power fluctuation, ensure that battery charge state is stabilized in the normal range (NR) of battery health regulatory requirement.Hybrid battery energy-storage system is linked into the common node place of wind energy turbine set, by by integrated to energy-type cells system, power type battery system and Wind turbines, utilize the power output of mixed energy storage system to grid connected wind power unit smoothing, according to the Compensation Objectives value of mixed energy storage system, control energy-storage system to compensate power fluctuation, improve output characteristic and the controllability of Wind turbines.Wherein power type battery energy-storage system is mainly used in the short-term fluctuation of smooth wind power field, and energy-type cells system is mainly used in the power curve according to wind energy turbine set prediction, coordinates auxiliary output, the long-period fluctuation of smooth wind power field.
The object of the invention is to adopt following technical proposals to realize:
Acquisition has a method for the blower fan of smooth power, and its improvements are, described method comprises:
(1) the output desired value of smooth power Wind turbines is measured;
(2) use the difference of the real output exporting desired value and blower fan, obtain the Compensation Objectives value of mixed energy storage system;
(3) the Compensation Objectives value of mixed energy storage system is divided by vibration frequency;
(4) according to the Compensation Objectives value of mixed energy storage system, energy-storage system transmitting-receiving specified power is controlled effectively to stabilize the power fluctuation of blower fan.
Preferably, described step (1) comprises introduces first order inertial loop by the power output of Wind turbines, in the grid-connected side of wind-driven generator to the smoothing power calculation of wind-powered electricity generation active power of output, adopt time constant to realize wind-powered electricity generation smothing filtering, obtain the output desired value smoothly.
Preferably, described step (3) comprises the Compensation Objectives value of mixed energy storage system is divided into peaked wave kinetic power, steady-sxtate wave motion power and frequent toward renaturation power fluctuation according to vibration frequency;
It comprises and instantaneously significantly increases or reduce the large peaked wave kinetic power of the power fluctuation amplitude that causes by wind speed, continued the steady-sxtate wave motion power that increases or reduce to cause by wind speed; Cause frequently toward renaturation power fluctuation with being changed from wind speed fast reciprocating.
Preferably, described step (4) comprises
Be responsible for from flow battery level and smooth frequent toward renaturation power fluctuation, compensate the high-frequency fluctuation component in wind power output power;
Steady-sxtate wave motion power carries out power smooth by lithium ion battery energy storage system, for compensating the low-frequency fluctuation component in wind power output power;
For peaked wave kinetic power, in the multiple dimensioned power filter algorithm of energy-storage system Local Controller, carry out limit value management regulates energy accumulation current converter charge and discharge process according to the size of the limit value of input echo signal, in order to level and smooth spike.
Preferably, described step (4) comprises
When wind driven generator output power is higher than system output power reference value, excess energy is stored in energy storage device; When output of a generator is lower than system output power reference value, by the fault offset stored in energy storage device out for electrical network provides power to support, wherein, reference value is determined by power system capacity and place network system dispatch command usually.
Preferably, described step (4) comprises and ensures that the state-of-charge of various batteries of energy-storage system remains in normal range (NR), avoids excessive charge/discharge, effectively can extend battery system useful life.
Compared with the prior art, beneficial effect of the present invention is:
The low pass power filter algorithm based on Multiple Time Scales of the present invention's design, can in conjunction with the battery health regulatory requirement of different energy-storage battery state-of-charge, while filtering power fluctuation radio-frequency component, ensure that battery charge state is stabilized in the normal range (NR) of battery health regulatory requirement.
The present invention takes the active parallel mixed energy storage system based on flow battery and lithium ion battery, smoothing to wind-powered electricity generation active power of output in the grid-connected side of wind-driven generator, by by integrated to lithium-ion battery systems, flow battery system and Wind turbines, utilize mixed energy storage system to improve grid connected wind power unit output smoothing, improve the output characteristic of Wind turbines and controllability of exerting oneself.Wherein redox flow battery energy storage system is mainly used in the short-term fluctuation of smooth wind power field, lithium-ion battery systems is mainly used in the power curve according to wind energy turbine set prediction, coordinate auxiliary output, the long-period fluctuation of smooth wind power field, wind-powered electricity generation exported and predicts close to consistent in advance, improving the output confidence level of wind-force wind-powered electricity generation.The low pass power filter algorithm based on Multiple Time Scales of the present invention's design, can in conjunction with the battery health regulatory requirement of different energy-storage battery state-of-charge, while filtering power fluctuation radio-frequency component, ensure that battery charge state is stabilized in the normal range (NR) of battery health regulatory requirement.
Accompanying drawing explanation
Fig. 1 is the method structure chart that a kind of acquisition provided by the invention has the blower fan of smooth power.
Fig. 2 is the level and smooth control principle drawing of a kind of power of fan provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, for accessing the wind power system structure chart of battery energy storage system.The present invention takes the active parallel mixed energy storage system based on flow battery and lithium ion battery, smoothing to wind-powered electricity generation active power of output in the grid-connected side of wind-driven generator, by by integrated to lithium-ion battery systems, flow battery system and Wind turbines, utilize mixed energy storage system to improve grid connected wind power unit output smoothing, improve the output characteristic of Wind turbines and controllability of exerting oneself.Energy storage converter is made up of three phase controllable commutating bridge, filter capacitor, for controlling the meritorious output of energy-storage system; Energy storage converter, by regulating d axle and the q shaft current of net side, controls electric current and the flow direction of energy-storage system, realizes meritorious and idle uneoupled control.Redox flow battery energy storage system is mainly used in the short-term fluctuation of smooth wind power field, lithium-ion battery systems is mainly used in the power curve according to wind energy turbine set prediction, coordinate auxiliary output, the long-period fluctuation of smooth wind power field, wind-powered electricity generation exported and predicts close to consistent in advance, improving the output confidence level of wind-force wind-powered electricity generation.
Be illustrated in figure 2 the control principle drawing that power of fan is level and smooth.The step of power smooth algorithm is as follows:
Step one, introduces first order inertial loop by the power output of SCIG Wind turbines
obtain output desired value Oo (s) smoothly;
Step 2, by poor for the real output exporting desired value and blower fan, obtains Compensation Objectives value Ho (s) of mixed energy storage system;
Step 3, wind power fluctuation (i.e. the Compensation Objectives value of energy-storage system) is divided into three parts according to vibration frequency: peaked wave kinetic power, steady-sxtate wave motion power and frequent past renaturation power fluctuation, calculate redox flow battery energy storage system and the fluctuation of lithium ion battery wind power thus, and the limit value of offset;
(1) peaked wave kinetic power.The power fluctuation amplitude significantly increased or reduce to cause because wind speed is instantaneous is large, but shared proportion very little (duration is less), energy hunting is less;
(2) steady-sxtate wave motion power.Continued to increase or reduce to cause by wind speed.Amplitude very little, but proportion is very large, and the duration is long, and energy hunting is very large;
(3) frequent toward renaturation power fluctuation.Changed by wind speed fast reciprocating and cause;
For this three classes power fluctuation, and combine the respective life-span of flow battery and lithium ion battery above and cost characteristics, be responsible for from flow battery level and smooth frequent toward renaturation power fluctuation, the high-frequency fluctuation component in compensation wind power output power; And steady-sxtate wave motion power carries out power smooth by lithium ion battery energy storage system, be mainly used to compensate the low-frequency fluctuation component in wind power output power; For peaked wave kinetic power, carry out limit value management in the controller, damage battery system to avoid excessive curent change; Battery energy storage system adopts direct Power Control, carries out Feedforward Decoupling, in order to fast-response control order to instantaneous power.
Step 4, according to the Compensation Objectives value of mixed energy storage system, controls energy-storage system and compensates power fluctuation.When wind driven generator output power is higher than system output power reference value, unnecessary stored energy in energy storage device; When output of a generator is lower than system output power reference value, can the fault offset stored in energy storage device out for electrical network provides power to support.Effectively can stabilize the fluctuation of Wind turbines power output in this way, and make wind power system export comparatively level and smooth active power.
Ensure that the state-of-charge of the various batteries of energy-storage system remains in normal range (NR) simultaneously, avoid excessive charge/discharge, effectively can extend battery system useful life.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field still can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (6)
1. acquisition has a method for the blower fan of smooth power, it is characterized in that, described method comprises:
(1) the output desired value of smooth power Wind turbines is measured;
(2) use the difference of the real output exporting desired value and blower fan, obtain the Compensation Objectives value of mixed energy storage system;
(3) the Compensation Objectives value of mixed energy storage system is divided by vibration frequency;
(4) according to the Compensation Objectives value of mixed energy storage system, energy-storage system transmitting-receiving specified power is controlled effectively to stabilize the power fluctuation of blower fan.
2. a kind of acquisition as claimed in claim 1 has the method for the blower fan of smooth power, it is characterized in that, described step (1) comprises introduces first order inertial loop by the power output of Wind turbines, in the grid-connected side of wind-driven generator to the smoothing power calculation of wind-powered electricity generation active power of output, adopt time constant to realize wind-powered electricity generation smothing filtering, obtain the output desired value smoothly.
3. a kind of acquisition as claimed in claim 1 has the method for the blower fan of smooth power, it is characterized in that, described step (3) comprises the Compensation Objectives value of mixed energy storage system is divided into peaked wave kinetic power, steady-sxtate wave motion power and frequent toward renaturation power fluctuation according to vibration frequency;
It comprises and instantaneously significantly increases or reduce the large peaked wave kinetic power of the power fluctuation amplitude that causes by wind speed, continued the steady-sxtate wave motion power that increases or reduce to cause by wind speed; Cause frequently toward renaturation power fluctuation with being changed from wind speed fast reciprocating.
4. a kind of acquisition as claimed in claim 1 has the method for the blower fan of smooth power, it is characterized in that, described step (4) comprises
Be responsible for from flow battery level and smooth frequent toward renaturation power fluctuation, compensate the high-frequency fluctuation component in wind power output power;
Steady-sxtate wave motion power carries out power smooth by lithium ion battery energy storage system, for compensating the low-frequency fluctuation component in wind power output power;
For peaked wave kinetic power, in the multiple dimensioned power filter algorithm of energy-storage system Local Controller, carry out limit value management regulates energy accumulation current converter charge and discharge process according to the size of the limit value of input echo signal, in order to level and smooth spike.
5. a kind of acquisition as claimed in claim 1 has the method for the blower fan of smooth power, it is characterized in that, described step (4) comprises
When wind driven generator output power is higher than system output power reference value, excess energy is stored in energy storage device; When output of a generator is lower than system output power reference value, by the fault offset stored in energy storage device out for electrical network provides power to support, wherein, reference value is determined by power system capacity and place network system dispatch command usually.
6. a kind of acquisition as claimed in claim 1 has the method for the blower fan of smooth power, it is characterized in that, the state-of-charge that described step (4) comprises the various batteries ensureing energy-storage system remains in normal range (NR), avoid excessive charge/discharge, effectively can extend battery system useful life.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510123042.9A CN104659801A (en) | 2015-03-19 | 2015-03-19 | Method for acquiring motor with smooth power |
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| CN201510123042.9A CN104659801A (en) | 2015-03-19 | 2015-03-19 | Method for acquiring motor with smooth power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429158A (en) * | 2015-12-15 | 2016-03-23 | 浙江大学 | Simplified restraint method for stabilizing power fluctuation under multi-time scale restraints |
| CN105514950A (en) * | 2015-11-25 | 2016-04-20 | 南方电网科学研究院有限责任公司 | Optimization method for calculating traveling wave protection current variable quantity of extra-high voltage direct current transmission line |
| CN111327072A (en) * | 2020-02-26 | 2020-06-23 | 岭东核电有限公司 | Steam turbine control method and equipment for nuclear power unit |
| CN112821425A (en) * | 2021-02-05 | 2021-05-18 | 国网宁夏电力有限公司电力科学研究院 | New energy power station power fluctuation stabilizing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514950A (en) * | 2015-11-25 | 2016-04-20 | 南方电网科学研究院有限责任公司 | Optimization method for calculating traveling wave protection current variable quantity of extra-high voltage direct current transmission line |
| CN105514950B (en) * | 2015-11-25 | 2018-06-19 | 南方电网科学研究院有限责任公司 | Optimization method for calculating traveling wave protection current variable quantity of extra-high voltage direct current transmission line |
| CN105429158A (en) * | 2015-12-15 | 2016-03-23 | 浙江大学 | Simplified restraint method for stabilizing power fluctuation under multi-time scale restraints |
| CN105429158B (en) * | 2015-12-15 | 2017-11-24 | 浙江大学 | The simplification constrained procedure of power swing is stabilized under a kind of Multiple Time Scales constraint |
| CN111327072A (en) * | 2020-02-26 | 2020-06-23 | 岭东核电有限公司 | Steam turbine control method and equipment for nuclear power unit |
| CN112821425A (en) * | 2021-02-05 | 2021-05-18 | 国网宁夏电力有限公司电力科学研究院 | New energy power station power fluctuation stabilizing method |
| CN112821425B (en) * | 2021-02-05 | 2023-08-22 | 国网宁夏电力有限公司电力科学研究院 | New energy power station power fluctuation stabilizing method |
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