CN102851703A - Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system - Google Patents
Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system Download PDFInfo
- Publication number
- CN102851703A CN102851703A CN2012103800902A CN201210380090A CN102851703A CN 102851703 A CN102851703 A CN 102851703A CN 2012103800902 A CN2012103800902 A CN 2012103800902A CN 201210380090 A CN201210380090 A CN 201210380090A CN 102851703 A CN102851703 A CN 102851703A
- Authority
- CN
- China
- Prior art keywords
- regulation
- autotransducer
- ultc
- fine tuning
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses an intelligent automatic voltage regulation optimized control method for an electrolytic aluminum power supply system, belonging to the field of heavy-current rectification system current stabilization control in chemical engineering and metallurgy. The current electrochemical rectification power supply voltage regulation mode at home and abroad mainly adopts intelligent automatic voltage control which combines autotransductor fine regulation and on-load tap-changing transformer coarse regulation; and in order to achieve the goal of long-term stable operation of the electrolytic aluminum potline current, the intelligent automatic voltage control, which combines autotransductor fine regulation and on-load tap-changing transformer coarse regulation, must be subjected to optimized control. The intelligent automatic voltage regulation optimized control method for an electrolytic aluminum power supply system can effectively keep the long-term stable operation of the potline current, implement quick regulation on the potline current, and effectively reduce the number of times of motions of the on-load tap-changing transformer, thereby implementing automatic regulation on the whole electrolytic aluminum power supply system and avoiding improper artificial intervention.
Description
Technical field
The present invention relates to a kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method, belong to chemical industry and metallurgical with low-voltage, high-current commutation system current stabilization control field.
Background technology
For the electrolysis of aluminum industry, the smoothness of galvanic current is one of important factor that affects electrolysis of aluminum output.In the electrolysis of aluminum, anode effect can cause that potline current fluctuates widely; If without steady flow measure, runout can appear in liquid aluminum, easily causes intereelectrode short-circuit.Be normal production, must strengthen the electrolyzer pole span, the result causes bath voltage to rise, power consumption increases, groove temperature is too high and the bad situation such as current efficiency reduction occurs, and current stabilization is controlled and just become indispensable important step in the aluminum smelting technology, and receives much attention for a long time.Therefore, the current stabilization control of potline current is an important topic that is worth research in the current electrolysis of aluminum industry power supply system in the research aluminium electrolysis process.
The voltage regulating mode of electrolytic aluminum commutation system mainly contains heavy-duty diode rectifier unit voltage regulating mode and high-power thyristor rectifier unit voltage regulating mode.Wherein, diode rectification unit voltage regulating mode adopts ULTC to carry out coarse adjustment, and autotransducer carries out fine tuning; The thyristor rectifier unit voltage regulating mode adopts no-load or ULTC to carry out coarse adjustment, and control thyristor conduction angle carries out fine tuning.ULTC is finished a tap-c hange control near 5s, being called mechanical time postpones, tap is frequent to be switched or flase operation in order to avoid, often mechanical time postpones to add for some time, so some ULTCs are finished tap-c hange control one time, required time is 20s-100s, belongs to the slow motion original paper.And the governing speed of autotransducer and thyristor can reach in the 0.5s, present intelligent automatic Regulation for ULTC coarse adjustment and autotransducer fine tuning, also do not realize unmanned automatization, the adjusting of ULTC is by manual shift, for realizing whole electrolytic aluminum power supply system current stabilization control in high efficient and reliable ground, the intelligence automatic Regulation just must have suitable Optimal Control Strategy, so that the process of VOLTAG CHOPPER VEGULATOR is finished by the autotransducer fine tuning, the ULTC coarse adjustment will guarantee that fine tuning has enough pressure regulation allowances to keep the long-term stability operation of potline current.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the invention provides a kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method.
Main technical content of the present invention is as follows:
A kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method comprises may further comprise the steps the intelligent automatic Regulation of autotransducer fine tuning and ULTC coarse adjustment:
(1), at first the range of regulation with the autotransducer fine tuning is divided into three phases, establishing autotransducer fine tuning range of regulation is 0-Δ U
Max, with 0-U
1Voltage range is made as first paragraph, is called the section of upgrading, and judges when the pressure regulation value is in the section of upgrading, and carries out the upshift operation of ULTC; With U
1-U
2Voltage range is made as second segment, is called free segment, judges that ULTC operated without the lifting shelves when pressure regulation value was in free segment; With U
2-Δ U
MaxVoltage range is made as the 3rd section, is called the section of lowering category, and judges when the pressure regulation value is in the section of lowering category, and carries out the operation that lowers category of ULTC; U wherein
1＜U
2
(2), when fluctuation or the change of potline current set-point occur in potline current, whether judge the set-point variable quantity less than rated current γ %, described γ % is obtained by on-the-spot actual parameter,
(a) if the set-point variable quantity greater than rated current γ %, then carries out following steps:
(a1), at first carry out the operation of corresponding ULTC coarse adjustment, described operation comprises and upgrading and downshift;
(a2), regulate time td and behind delay time Δ td, the residing interval of autotransducer fine tuning this moment magnitude of voltage is judged until the autotransducer fine tuning, carry out corresponding ULTC operation according to the interval; Described delay time Δ td is greater than the time that anode effect is eliminated;
(a3) if when autotransducer fine tuning voltage is in the free segment, ULTC coarse adjustment inoperation; If autotransducer fine tuning this moment magnitude of voltage still is not in the free segment, the situation that comprises the bound that is in the autotransducer fine tuning, proceed the operation of ULTC coarse adjustment, repeat above a1～a2 process, until autotransducer fine tuning voltage is in the free segment;
(b) if the set-point variable quantity less than rated current γ %, then carries out the operation of above-mentioned steps a2～a3.
The voltage range of the free segment in the above-mentioned steps 1 will be about 1.5 times of a caused output voltage variable quantity of gear of variation under the ULTC normal operation.
The section of upgrading in the above-mentioned steps 1 and the range of regulation of the section of lowering category will be able to satisfy once the range of regulation of the most common fluctuation of current.
By technique scheme, the present invention has following advantages at least:
The long-term stability operation that electrolytic aluminum power supply system intelligence automatic Regulation Optimal Control Strategy of the present invention can effectively keep potline current, realize the quick adjustment of potline current, effectively reduce the action frequency of ULTC, can realize the automatization adjusting of whole electrolytic aluminum power supply system, avoid inappropriate human intervention.Avoided occurring that the autotransducer fine tuning has reached the limit and electric current does not reach set-point, because the potline current that causes of ULTC coarse adjustment slowly adjusting time departs from the situation of normal operating conditions for a long time, and then avoid larger financial loss, be conducive to the long-term stability operation of potline current, for Aluminum Electrolysis Production larger applied economics meaning arranged.Simultaneously the parameter of the power-supply unit of electrolytic aluminum is selected to provide new reference standard, i.e. the definite requirement that will satisfy Optimal Control Strategy of the range of regulation of every grade of range of regulation of ULTC and autotransducer or thyristor.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method schema.
Fig. 2 is the schematic diagram of the simple control method effect comparison of electrolytic aluminum power supply system intelligence automatic Regulation.
Embodiment
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its embodiment, structure, feature and effect thereof to foundation the present invention proposes are described in detail as follows.
A kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method comprises may further comprise the steps the intelligent automatic Regulation of autotransducer fine tuning and ULTC coarse adjustment:
At first the range of regulation with the autotransducer fine tuning is divided into three phases, and establishing autotransducer fine tuning range of regulation is 0-Δ U
Max, with 0-U
1Voltage range is made as first paragraph, is called the section of upgrading; With U
1-U
2Voltage range is made as second segment, is called free segment; With U
2-Δ U
MaxVoltage range is made as the 3rd section, is called the section of lowering category; U wherein
1＜U
2Wherein the voltage range of free segment will be about 1.5 times of a caused output voltage variable quantity of gear of variation under the ULTC normal operation.For guaranteeing to be in free segment and near U when the fine tuning range of regulation
1Or U
2Situation under, fine tuning has enough regulating powers in the again fluctuation of current situation, the range of regulation of the section of upgrading and the section of lowering category will be able to satisfy once the range of regulation of the most common fluctuation of current.Wherein the range of regulation of the section of lowering category will satisfy the current setting in the anode effect situation, and therefore the range of regulation of the section of lowering category is greater than the range of regulation of the section of upgrading.Being provided with like this is beneficial to the action frequency that reduces ULTC.
As shown in Figure 1, when fluctuation or the change of potline current set-point occur potline current, whether judge the set-point variable quantity less than rated current γ %, described γ % is obtained by on-the-spot actual parameter,
If 1 set-point variable quantity greater than rated current γ %, then carries out following steps:
(a1), at first carry out the operation of corresponding ULTC coarse adjustment, described operation comprises and upgrading and downshift;
(a2), regulate time td and behind delay time Δ td, the residing interval of autotransducer fine tuning this moment magnitude of voltage is judged until the autotransducer fine tuning, carry out corresponding ULTC operation according to the interval; Described delay time Δ td is greater than the time that anode effect is eliminated;
(a3) if when autotransducer fine tuning voltage is in the free segment, ULTC coarse adjustment inoperation; If autotransducer fine tuning this moment magnitude of voltage still is not in the free segment, the situation that comprises the bound that is in the autotransducer fine tuning, proceed the operation of ULTC coarse adjustment, repeat above a1～a2 process, until autotransducer fine tuning voltage is in the free segment;
If 2 set-point variable quantities less than rated current γ %, then carry out the operation of above-mentioned steps a2～a3.
Embodiment 1:
In the situation that fluctuation occurs in potline current, because the set-point variable quantity is 0, certainly less than rated current γ %, at first by the autotransducer fine tuning electric current is carried out quick adjustment, realize the rapid reaction of potline current, determine again the action situation of ULTC coarse adjustment according to the range of regulation of autotransducer fine tuning place this moment, for preventing malfunction, judge whether the ULTC coarse adjustment is carried out operating in through fine tuning of lifting shelves and regulated time td and carry out, and delay time Δ td is greater than the time that anode effect is eliminated behind delay time Δ td.Autotransducer fine tuning scope is in the section of upgrading when regulating later, and for autotransducer fine tuning in the situation that guarantees next fluctuation of current has enough nargin, upshift operation is carried out in the ULTC coarse adjustment; Autotransducer fine tuning scope is in free segment when regulating later, and the ULTC coarse adjustment is failure to actuate; Autotransducer fine tuning scope is in the section of lowering category when regulating later, for autotransducer fine tuning in the situation that guarantees next fluctuation of current has enough nargin, and the ULTC coarse adjustment operation that lowers category.Arranging of free segment can guarantee to reduce the unnecessary action of ULTC coarse adjustment in the situation that the less and next fluctuation of current of Series current fluctuation still has enough regulating powers.Carry out in the process of lifting shelves in the ULTC coarse adjustment; the regulating power that still keeps the autotransducer fine tuning; the relative fine tuning of the regulate process of ULTC coarse adjustment is very slow; voltage slowly changes in the regulate process of ULTC coarse adjustment; potline current is exerted an influence; quick adjustment is carried out in the autotransducer fine tuning in time variation of response current, keeps the long-term stability operation of potline current.
The ULTC coarse adjustment is after having finished the operation that once upgrades or lower category, regulate time td and behind delay time Δ td, the residing interval of fine tuning this moment magnitude of voltage is judged until the autotransducer fine tuning, if autotransducer fine tuning this moment magnitude of voltage still is not in the free segment, the situation that comprises the bound that is in fine tuning is proceeded the lifting shelves operation of ULTC coarse adjustment.Repeat above process, until autotransducer fine tuning voltage is in the free segment.
Embodiment 2:
In the situation that integrated automatic monitoring system change potline current set-point, the reference quantity of variable quantity as judging that the ULTC coarse adjustment is moved take the given value of current value, if the increase of given value of current value is greater than the γ % of rated current, the regulating power that exceeds the autotransducer fine tuning, the upshift operation that directly carry out the ULTC coarse adjustment this moment; If the decrease of given value of current value exceeds the regulating power of autotransducer fine tuning greater than the γ % of rated current, directly carry out the operation that lowers category of ULTC coarse adjustment this moment.Equally, the ULTC coarse adjustment is after having finished the operation that once upgrades or lower category, regulate time td and behind delay time Δ td, the residing interval of fine tuning this moment magnitude of voltage is judged until the autotransducer fine tuning, if autotransducer fine tuning this moment magnitude of voltage still is not in the free segment, the situation that comprises the bound that is in the autotransducer fine tuning is proceeded the lifting shelves operation of ULTC coarse adjustment.Repeat above process, until autotransducer fine tuning voltage is in the free segment.
Figure 2 shows that the schematic diagram of the simple control method effect comparison of electrolytic aluminum power supply system intelligence automatic Regulation.The simple control strategy that electric current temporal evolution curve 1 is followed among the figure is for carrying out the pressure regulation operation of ULTC after fine tuning is in ultimate limit state and certain time.The optimizing and controlling method of electric current temporal evolution curve 2.In the simple control strategy of intelligent automatic Regulation, after front primary current fluctuation is regulated, autotransducer fine tuning pressure regulation value has been in closes on ultimate limit state, in this fluctuation of current, enough regulate fluctuation because of the residual accommodation scarce capacity and carry out the adjusting of ULTC, because it is chronic that ULTC is regulated, this moment, the electrolytic aluminum commutation system was in the electric current unsteady state within the quite a long time, thereby caused larger financial loss.And the employing optimizing and controlling method, to most fluctuation of current, because the autotransducer fine tuning has enough regulating powers, rely on the rapidity of autotransducer fine tuning pressure regulation, potline current can return system's set-point, the smooth long term running that has kept electric current very soon.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (3)
1. electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method is characterized in that comprising may further comprise the steps the intelligent automatic Regulation of autotransducer fine tuning and ULTC coarse adjustment:
(1), at first the range of regulation with the autotransducer fine tuning is divided into three phases, establishing autotransducer fine tuning range of regulation is 0-Δ U
Max, with 0-U
1Voltage range is made as first paragraph, is called the section of upgrading, and judges when the pressure regulation value is in the section of upgrading, and carries out the upshift operation of ULTC; With U
1-U
2Voltage range is made as second segment, is called free segment, judges that ULTC operated without the lifting shelves when pressure regulation value was in free segment; With U
2-Δ U
MaxVoltage range is made as the 3rd section, is called the section of lowering category, and judges when the pressure regulation value is in the section of lowering category, and carries out the operation that lowers category of ULTC; U wherein
1＜U
2
(2), when fluctuation or the change of potline current set-point occur in potline current, whether judge the set-point variable quantity less than rated current γ %, described γ % is obtained by on-the-spot actual parameter,
(a) if the set-point variable quantity greater than rated current γ %, then carries out following steps:
(a1), at first carry out the operation of corresponding ULTC coarse adjustment, described operation comprises and upgrading and downshift;
(a2), regulate time td and behind delay time Δ td, the residing interval of autotransducer fine tuning this moment magnitude of voltage is judged until the autotransducer fine tuning, carry out corresponding ULTC operation according to the interval; Described delay time Δ td is greater than the time that anode effect is eliminated;
(a3) if when autotransducer fine tuning voltage is in the free segment, ULTC coarse adjustment inoperation; If autotransducer fine tuning this moment magnitude of voltage still is not in the free segment, the situation that comprises the bound that is in the autotransducer fine tuning, proceed the operation of ULTC coarse adjustment, repeat above a1～a2 process, until autotransducer fine tuning voltage is in the free segment;
(b) if the set-point variable quantity less than rated current γ %, then carries out the operation of above-mentioned steps a2～a3.
2. a kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method according to claim 1 is characterized in that: the voltage range of the free segment in the described step 1 will change about 1.5 times of a caused output voltage variable quantity of gear under the ULTC normal operation.
3. a kind of electrolytic aluminum power supply system intelligence automatic Regulation optimizing and controlling method according to claim 1 is characterized in that: the section of upgrading in the described step 1 and the range of regulation of the section of lowering category will be able to satisfy once the range of regulation of the most common fluctuation of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103800902A CN102851703A (en) | 2012-10-09 | 2012-10-09 | Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103800902A CN102851703A (en) | 2012-10-09 | 2012-10-09 | Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102851703A true CN102851703A (en) | 2013-01-02 |
Family
ID=47398665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103800902A Pending CN102851703A (en) | 2012-10-09 | 2012-10-09 | Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102851703A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103569A (en) * | 2013-02-04 | 2013-05-15 | 河海大学 | Electrolytic-aluminium stabilized current control method |
| CN106355297A (en) * | 2016-10-11 | 2017-01-25 | 国电南瑞科技股份有限公司 | Electrolytic aluminum load characteristic-based power grid loss reduction optimization method |
| CN106786615A (en) * | 2017-01-03 | 2017-05-31 | 国家电网公司 | A kind of transformer action number of times smart allocation method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB436929A (en) * | 1933-12-18 | 1935-10-21 | British Thomson Houston Co Ltd | Improvements in and relating to electric circuit control apparatus |
| GB784177A (en) * | 1955-08-05 | 1957-10-02 | Allis Chalmers Mfg Co | Regulating system for an alternator with exciter field winding in series with alternator field winding |
| GB804712A (en) * | 1955-10-14 | 1958-11-19 | Stone J & Co Ltd | Improvements relating to electrical supply systems |
| CN2126436U (en) * | 1991-10-28 | 1992-12-30 | 马屹 | Automatically voltage regulating device for loading joystick transformer |
| CN1925299A (en) * | 2006-05-24 | 2007-03-07 | 中国铝业股份有限公司 | Method for realizing high-quality current stabilization feedback signal of rectifier unit |
-
2012
- 2012-10-09 CN CN2012103800902A patent/CN102851703A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB436929A (en) * | 1933-12-18 | 1935-10-21 | British Thomson Houston Co Ltd | Improvements in and relating to electric circuit control apparatus |
| GB784177A (en) * | 1955-08-05 | 1957-10-02 | Allis Chalmers Mfg Co | Regulating system for an alternator with exciter field winding in series with alternator field winding |
| GB804712A (en) * | 1955-10-14 | 1958-11-19 | Stone J & Co Ltd | Improvements relating to electrical supply systems |
| CN2126436U (en) * | 1991-10-28 | 1992-12-30 | 马屹 | Automatically voltage regulating device for loading joystick transformer |
| CN1925299A (en) * | 2006-05-24 | 2007-03-07 | 中国铝业股份有限公司 | Method for realizing high-quality current stabilization feedback signal of rectifier unit |
Non-Patent Citations (2)
| Title |
|---|
| 梁学民等: "《现代铝电解生产技术与管理》", 30 November 2011, 中南大学出版社 * |
| 王益考: "220kV整流机组稳流控制系统", 《电气时代》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103569A (en) * | 2013-02-04 | 2013-05-15 | 河海大学 | Electrolytic-aluminium stabilized current control method |
| CN106355297A (en) * | 2016-10-11 | 2017-01-25 | 国电南瑞科技股份有限公司 | Electrolytic aluminum load characteristic-based power grid loss reduction optimization method |
| CN106355297B (en) * | 2016-10-11 | 2019-08-23 | 国电南瑞科技股份有限公司 | A kind of power grid decreasing loss optimization method based on electrolytic aluminium part throttle characteristics |
| CN106786615A (en) * | 2017-01-03 | 2017-05-31 | 国家电网公司 | A kind of transformer action number of times smart allocation method and device |
| CN106786615B (en) * | 2017-01-03 | 2019-05-03 | 国家电网公司 | A kind of transformer action number smart allocation method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103391015B (en) | A kind of variable parameter PI regulator parameter method of adjustment | |
| CN107612333B (en) | A kind of control circuit and method based on two-tube buck-boost converter | |
| CN104714566B (en) | A kind of condensate throttling control system and its method of controlling security | |
| CN102851704B (en) | Aluminum cell supplying device single-point controls baiting method | |
| CN112290581A (en) | New energy off-grid hydrogen production system | |
| CN113122879A (en) | Hydrogen production control method and hydrogen production system | |
| CN102851703A (en) | Intelligent automatic voltage regulation optimized control method for electrolytic aluminum power supply system | |
| KR102188207B1 (en) | Hierarchical multi-time scale look-ahead CVR framework system for smart distribution system and apparatus therefor | |
| CN102944998B (en) | Method for modeling electrolytic aluminium rectification system | |
| CN105119297A (en) | Method used for adaptive reactive power compensation of photovoltaic inverter | |
| CN102677097B (en) | Flow-stabilizing fault tolerance control method of aluminum electrolyzation power supply | |
| CN104953623B (en) | The control method of photovoltaic plant inverter under a kind of operating mode of rationing the power supply | |
| CN101922443A (en) | Control method of variable frequency lift pump based on liquid level adjustment | |
| CN202072794U (en) | Full-digital energy-saving single crystal growth power supply for solar energy and control device | |
| CN103759528A (en) | Novel energy-saving steady-constant current power regulating (electrode-fluctuation-free) system of alternating current electrical arc furnace | |
| CN101260541B (en) | Fast voltage-reducing energy-saving starting method for aluminum electrolysis bath | |
| CN107614996A (en) | Flickering control to electric arc furnaces | |
| CN101860041A (en) | Method for dynamically adjusting busbar voltage to improve grid connection efficiency | |
| CN116254576A (en) | Method and system for adjusting heat balance of aluminum electrolysis cell shell | |
| CN101752869B (en) | Ac MgO electric smelting furnace power supply system based on power saving operation | |
| CN115811058A (en) | Emergency frequency control method for electric power system with metallurgical load participating in safety auxiliary service | |
| CN101935851B (en) | Current strengthening and efficient energy saving method of prebaked aluminium electrolysis cell | |
| CN111503012A (en) | Intelligent water supply adjusting system and method based on pump station circulation technology | |
| CN107834675B (en) | Super capacitor charger for wind power pitch system and charging method thereof | |
| CN103103569A (en) | Electrolytic-aluminium stabilized current control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130102 |