CN101572432A - Pulse type charger for wind power pitch-controlled system - Google Patents
Pulse type charger for wind power pitch-controlled system Download PDFInfo
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- CN101572432A CN101572432A CNA2009100259458A CN200910025945A CN101572432A CN 101572432 A CN101572432 A CN 101572432A CN A2009100259458 A CNA2009100259458 A CN A2009100259458A CN 200910025945 A CN200910025945 A CN 200910025945A CN 101572432 A CN101572432 A CN 101572432A
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a pulse type charger for a wind power pitch-controlled system, which comprises a power module, a transformer, a monitoring unit, and a voltage adjusting circuit. A single-phase transformer is adopted to rectify AC into a 100 to 120 Hz low-frequency DC pulsating current; a charging voltage is adjusted by controlling a tap of an input end of the transformer; and the structure greatly improves the reliability and the adaptability of the working range of the charger. In the charging process, a pulse current charge method is used, and a cyclical pulsating current is used to charge a battery to ensure that the battery has time to restore the original status of the battery and the influence of polarization phenomenon is reduced.
Description
Technical field
The present invention relates to a kind of wind power plant, relate in particular to the pulse type charger that charges to the backup battery group that is exclusively used in a kind of wind power pitch-controlled system.
Background technology
Along with non-renewable energy resources face exhausted awkward situation at world wide, for satisfying suitability for industrialized production and the human lives is required, people are to the concern of solar energy, wind-force, these regenerative resources of waterpower and utilize day by day and promote.Wherein, wind power generation is a kind of relatively ripe energy development technology that developed, especially on the plateau, there is popularization and application widely in area such as coastal.
In wind power pitch-controlled system, the timely electric energy supplement of batteries when guaranteeing electric network power-fail, power to the load at the appointed time, guarantee that pitch-controlled system can reliably working a period of time, be by will be in support the battery pack of power supply be articulated on the dc bus of motor driver and realize, as shown in Figure 1.When the electrical network operate as normal, the backup battery group is operated in floating charge state, plays the effect of smothing filtering and maintenance capacity (replenishing the capacitance loss of self discharge).In case electric network power-fail, the backup battery group is devoted oneself to work immediately, is electric; Work as power system restoration, power module charges to the backup battery group immediately.
In wind power pitch-controlled system, the backup battery group generally adopts valve control maintenance-free lead accumulator, and generally adopts switching power circuit to the charger of its charging, controls charged state by the voltage of microcomputer monitoring battery.Export certain voltage by the PWM that adjusts switching tube, battery is charged; And carry out temperature-compensating according to the variation of battery temperature, be a kind of charging modes of switch power supply type.The instantaneous rising of the voltage of this charging modes, electric current is less relatively, makes that the charging interval of battery is longer; And be easy to generate oscillatory occurences and the phenomenon of overcharging when being full of at batteries charging.
Summary of the invention
The objective of the invention is to solve the above-mentioned technical problem that prior art exists, provide a kind of more reliably, short pulse type charger of charging interval.
Purpose of the present invention is achieved through the following technical solutions:
A kind of pulse type charger of wind power pitch-controlled system, comprise to charger itself and operating voltage is provided and the power module of charging current is provided to pond to be charged group, transformer, monitoring unit, voltage-regulating circuit, described transformer is connected to power module, is used for the AC rectification of power module is become can be the direct current that pond to be charged group is charged; The DC output end of described transformer is connected with pond to be charged group; Described monitoring unit is connected between described voltage-regulating circuit and the pond to be charged group, is used to gather and discern voltage, electric current and the temperature of pond to be charged group; The signal output part of described monitoring unit is connected with voltage-regulating circuit, the output voltage of described voltage-regulating circuit control transformer.
Further, described voltage-regulating circuit is connected with the tapped coil of transformer, is used for adjusting by the control transformer tap output voltage of transformer.
Again further, also be connected with a filter circuit between the DC output end of described transformer and the pond to be charged group.Described transformer is a single-phase transformer.
Further, described monitoring unit comprises the transducer of the voltage, electric current and the temperature that are used to gather pond to be charged group.
Beneficial effect of the present invention is mainly reflected in: by adopting single-phase transformer, AC rectification is become 100HZ～120HZ low frequency dc pulse electric current, pass through smoothed filter circuit again, the adjustment of charging voltage is to regulate by the tap of control input end, and such structure has improved the adaptability of the working range of the reliability of charger and charger greatly.Use pulse charging method in charging process, charging the battery with periodic pulsating current to make battery recover its original state if having time, reduces the influence of polarization phenomena.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: the schematic block diagram of backup battery group management of charging and discharging of the present invention system.
Fig. 2: the structured flowchart of pulse type charger of the present invention.
Fig. 3: the classification constant-current pulse mise-a-la-masse method schematic diagram of pulse type charger of the present invention.
Embodiment
The present invention has disclosed a kind of pulse type charger of wind power pitch-controlled system, as shown in Figure 2, comprises operating voltage to charger itself being provided and providing the power module of charging current, transformer, monitoring unit, voltage-regulating circuit to backup battery group to be charged.Described transformer is connected to power module, is used for the AC rectification of power module is become can be the direct current that pond to be charged group is charged; The DC output end of described transformer is connected with pond to be charged group; Described monitoring unit is connected between described voltage-regulating circuit and the pond to be charged group, is used to gather and discern voltage, electric current and the temperature of pond to be charged group; The signal output part of described monitoring unit is connected with voltage-regulating circuit, the output voltage of described voltage-regulating circuit control transformer.
The charger of present embodiment relates to parameters such as battery operated voltage, operating current, temperature in the process that charges the battery, these all are the important parameters of characterizing battery state.Adopt transducer to extract these parameters, and then cooperate failure diagnosis, report to the police and function such as scene of the accident processing automatically, just can form the battery cell monitoring unit.
Transformer is a single-phase transformer among the present invention, by direct employing Industrial Frequency Transformer AC rectification is become direct current, increase the tap of regulating at secondary side again, change the alternating voltage of secondary side, behind over commutation, form the dc pulse moving voltage of 100～120HZ, circuit design is simple like this, more can increase the reliability of system.
Described voltage-regulating circuit is connected with the tapped coil of transformer, controls charging voltage by monitoring charging voltage and suitable temperature-compensating, and the change of charging voltage is to realize by the tap of adjusting transformer.Again further, also be connected with a filter circuit between the DC output end of described transformer and the pond to be charged group.
Generally, the charging method of lead acid accumulator mainly contains constant current, constant voltage at present.What charger of the present invention adopted is the pulse current charge mode.In charging process, as long as charging current is no more than the acceptable electric current of storage battery, internal storage battery just can not produce a large amount of bubbles.The polarization phenomena that produce in the storage battery can hinder charging, and gas efficiency and temperature rise are significantly raise.Therefore, polarizing voltage is the key factor that influences charging rate, and charging the battery with periodic pulsating current to make battery recover its original state if having time, reduces the influence of polarization phenomena.
In the charging process of the present invention, adopt classification to decide the current impulse rapid charging, what charging current is divided into, as shown in Figure 3.Adopt big electric current when beginning to charge, along with the increase of battery capacity, voltage raises gradually, and current class begins to reduce, and classification reduces with the rising of accumulator voltage to make the pulse amplitude of charging current and width.Adopt this charging modes can eliminate the oscillatory occurences and the problem of overcharging that is prone to when charging is approaching to be full of.
This charging system also has temperature compensation characteristic, 1 ℃ of the every rising of ambient temperature, the float charge voltage of each battery cell 3mV that just descends.Charging voltage will be improved when battery temperature reduces, charging voltage will be reduced when battery temperature raises.Monitoring unit in the present embodiment receives this temperature information, and the output voltage of control transformer.
Claims (5)
1. the pulse type charger of a wind power pitch-controlled system comprises operating voltage to charger itself being provided and providing the power module of charging current to pond to be charged group that it is characterized in that: described pulse type charger comprises transformer, monitoring unit, and voltage-regulating circuit,
Described transformer is connected to power module, is used for the AC rectification of power module is become can be the direct current that pond to be charged group is charged;
The DC output end of described transformer is connected with pond to be charged group;
Described monitoring unit is connected between described voltage-regulating circuit and the pond to be charged group, is used to gather and discern voltage, electric current and the temperature of pond to be charged group;
The signal output part of described monitoring unit is connected with voltage-regulating circuit, the output voltage of described voltage-regulating circuit control transformer.
2. the pulse type charger of wind power pitch-controlled system according to claim 1, it is characterized in that: described voltage-regulating circuit is connected with the tapped coil of transformer, is used for adjusting by the control transformer tap output voltage of transformer.
3. the pulse type charger of wind power pitch-controlled system according to claim 1 is characterized in that: also be connected with a filter circuit between the DC output end of described transformer and the pond to be charged group.
4. the pulse type charger of wind power pitch-controlled system according to claim 1, it is characterized in that: described transformer is a single-phase transformer.
5. the pulse type charger of wind power pitch-controlled system according to claim 1, it is characterized in that: described monitoring unit comprises the transducer of the voltage, electric current and the temperature that are used to gather pond to be charged group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100259458A CN101572432A (en) | 2009-03-12 | 2009-03-12 | Pulse type charger for wind power pitch-controlled system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100259458A CN101572432A (en) | 2009-03-12 | 2009-03-12 | Pulse type charger for wind power pitch-controlled system |
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| Publication Number | Publication Date |
|---|---|
| CN101572432A true CN101572432A (en) | 2009-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100259458A Pending CN101572432A (en) | 2009-03-12 | 2009-03-12 | Pulse type charger for wind power pitch-controlled system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872916A (en) * | 2012-12-11 | 2014-06-18 | 苏州风行电气有限公司 | Charging circuit capable of charging a variable pitch system standby power supply |
| CN104747373A (en) * | 2013-12-31 | 2015-07-01 | 通用电气公司 | System and method used for protecting standby variable-pitch control system of wind turbine battery |
| CN106787064A (en) * | 2016-12-21 | 2017-05-31 | 苏州格远电气有限公司 | Wind turbine pitch system charging control circuit |
-
2009
- 2009-03-12 CN CNA2009100259458A patent/CN101572432A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872916A (en) * | 2012-12-11 | 2014-06-18 | 苏州风行电气有限公司 | Charging circuit capable of charging a variable pitch system standby power supply |
| CN104747373A (en) * | 2013-12-31 | 2015-07-01 | 通用电气公司 | System and method used for protecting standby variable-pitch control system of wind turbine battery |
| CN106787064A (en) * | 2016-12-21 | 2017-05-31 | 苏州格远电气有限公司 | Wind turbine pitch system charging control circuit |
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Application publication date: 20091104 |