CN205539202U - Wind generating set holds internal resistance of cell monitoring module - Google Patents

Wind generating set holds internal resistance of cell monitoring module Download PDF

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Publication number
CN205539202U
CN205539202U CN201620057142.6U CN201620057142U CN205539202U CN 205539202 U CN205539202 U CN 205539202U CN 201620057142 U CN201620057142 U CN 201620057142U CN 205539202 U CN205539202 U CN 205539202U
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CN
China
Prior art keywords
internal resistance
accumulator
module
wind power
power generating
Prior art date
Application number
CN201620057142.6U
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Chinese (zh)
Inventor
陈子新
王明
丛智慧
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大唐(赤峰)新能源有限公司
中国大唐集团新能源股份有限公司
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Priority to CN201620057142.6U priority Critical patent/CN205539202U/en
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Publication of CN205539202U publication Critical patent/CN205539202U/en

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Abstract

The utility model relates to a wind generating set holds internal resistance of cell monitoring module, include: battery, charging switch, discharge switch, load, its characterized in that: the load be electric capacity, charging switch and electric capacity and hold A series of cells, discharge switch and electric capacity and data acquisition module establish ties. Electric capacity can simultaneously can get up to supply energy storage other modules to use again as the load, so not only measure simple, storage battery microcomputer's waste in the time of can avoiding adopting outer other power consumptions load test of electric capacity simultaneously.

Description

A kind of wind power generating set accumulator internal resistance monitoring modular
Technical field
This utility model relates to a kind of wind generating set pitch control system field, particularly relates to a kind of wind-driven generator Group storage battery internal resistance monitoring modular.
Background technology
In recent years, analysing valve control type lead-acid accumulator battery is obtained for rapid popularization and application in many fields.At Wind turbines In pitch-controlled system, sealed valve control formula lead-acid accumulator is one of widely used back-up source energy storage device.At wind Group of motors runs scene, and a series of problems such as the life of storage battery for variable pitch is short, fault is many, maintenance cost is high are all Wind turbines can be affected properly functioning.According to Wind turbines projected life, in the life cycle of Wind turbines, Accumulator to change 5 times~8 times, and the expense of accumulator is up to more than the 40% of pitch-controlled system gross investment.No matter from System operation reliability, maintainability, or the consideration of economic benefit angle, back-up source has all become pitch-controlled system In the weakest link.The monitoring technology being applied to now accumulator can not well monitor the shape of accumulator State, and the internal resistance information of accumulator can react the state of its accumulator very well.
The common methods measuring accumulator internal resistance at present has densimetry, open-circuit voltage method, direct-current discharge method and exchanges Method etc..Wherein: densimetry, it is the internal resistance being estimated accumulator by the density measuring battery liquid, often For the internal resistance measurement of open type lead-acid battery, the narrow application range of the method.Open-circuit voltage method, is by surveying The terminal voltage of amount accumulator estimates accumulator internal resistance, and precision is very poor, it could even be possible to derive a wrong conclusion.Directly Banishing electrical method, being by battery being carried out transient large current discharge, measure the transient voltage fall on battery, then lead to Cross Ohm's law and calculate the internal resistance of cell, although this method have also been obtained in practice and is widely applied, but On-line measurement cannot be realized.Alternating current method, is by accumulator is injected a constant ac current signal, surveys Measure voltage response signal and both phase contrasts at accumulator two ends, formula of impedance determine accumulator Internal resistance.The method is not required to discharge accumulator, it is possible to achieve the safe on-line checking internal resistance of cell, therefore will not The performance of accumulator is impacted.But the method need measure ac current signal, voltage response signal and Phase contrast between voltage and current, this method not only interference factor is many, and adds the complexity of system, Also have impact on certainty of measurement simultaneously.Meanwhile, all to utilize phase-locked amplifying element to carry out little in existing alternating current method test internal resistance Signal processing, due to special phase-locked amplification chip price costly, therefore this method controls cost for needs Occasion also and inapplicable.
The Chinese patent of Application No. CN200810055316 relates to a kind of accumulator internal resistance measurement method, belongs to Accumulator heavy DC electric discharge is utilized to measure the measuring method of accumulator internal resistance.Specifically comprise the following steps that selection High-power, in high precision, the resistance of little resistance is as discharge resistance;Controlling high power relay Guan Bi, connection is put Electricity loop makes accumulator spark described discharge resistance, controls discharge time at 7-12s, surveys simultaneously Discharge current I during amount electric discharge and the voltage V1 at accumulator two ends;Disconnection discharge loop, time delay 1-2ms, The voltage V2 at measurement accumulator two ends now;The internal resistance of calculating accumulator.The measurement of above-mentioned accumulator internal resistance Method can measure the internal resistance of accumulator, but: the time of (1) above-mentioned measuring method controls to be difficult to hold, and has It is likely to result in and measures unsuccessfully;(2) measuring method is difficult to operation, it is possible to the error of measurement result is bigger.
The Chinese patent of Application No. CN201510275601 discloses a kind of lead battery internal resistance detection circuit, Including for for battery discharge, make to produce on the both positive and negative polarity of battery the discharge module of voltage drop, be used for gathering electricity The pressure drop acquisition module of pond both positive and negative polarity voltage drop, for detecting the load voltage detection module of the upper magnitude of voltage of load With process computing module.Described process computing module calculates the average of the internal resistance of cell according to the magnitude of voltage in load Electric current, calculates the internal resistance of cell further according to the voltage drop of battery plus-negative plate and the average current of the internal resistance of cell.
Given this this utility model is proposed.
Utility model content
The purpose of this utility model is for overcoming prior art wind power generating set accumulator internal resistance measurement error bigger And in Ce Lianging, accumulator electric-quantity is caused the shortcomings such as waste or deficiency, it is provided that one can monitor wind power generating set The internal resistance of accumulator, and measure simple a kind of wind power generating set accumulator internal resistance monitoring modular.
In order to realize this purpose, this utility model adopts the following technical scheme that
A kind of wind power generating set accumulator internal resistance monitoring modular, including: accumulator, charge switch, electric discharge are opened Closing, load, described load is electric capacity, and described charge switch and electric capacity are connected with accumulator, and described puts Electric switch and electric capacity are connected with data acquisition module.Electric capacity can store energy again as load simultaneously For other modules, the most not only measure simple, can avoid using other power consumptions outside electric capacity negative simultaneously The waste of accumulator electric-quantity when carrying test.
Further, described data acquisition module is the analog digital conversion that analogue signal is converted into digital signal Device.Data acquisition module can gather the voltage and current information of accumulator when accumulator internal resistance is tested, it is simple to The internal resistance carrying out accumulator calculates.
Further, described analog-digital converter is 16 high-precision adcs.16 high precision analogues Transducer can obtain information of voltage and current information more accurately.
Further, also including controlling computing module, the described computing module that controls connects data acquisition module Outfan.On the one hand control computing module and can control charge switch and/or discharge switch by internal processes It is opened or closed, on the other hand can accept the voltage and current information that data acquisition module obtains, by inside Program calculates the internal resistance of accumulator.
Further, described control computing module is microprocessor.Microprocessor can realize controlling to calculate mould The function of two aspects of block, has volume little simultaneously, lightweight advantage.
Further, also include that stand-by power supply, described stand-by power supply are connected with accumulator and control computing module. Stand-by power supply in accumulator electric-quantity deficiency etc. in particular cases to microprocessor power supply.
Further, also include that internal resistance output module, described internal resistance output module calculate mould with described control Block is connected.Internal resistance output module is for obtaining the internal resistance information controlling the accumulator that computing module calculates and by interior Resistance information passes to outfan.
Further, described internal resistance output module includes radio-frequency communication module and printed antenna, described radio frequency The input of communication module connects the outfan controlling computing module, and the outfan of described radio-frequency communication module is even Connecing the signal feed-in part of printed antenna, the radiant body of printed antenna is for containing accumulator internal resistance letter to external radiation The electromagnetic wave signal of breath.Operator can understand the work of accumulator according to the signal containing internal resistance information obtained State.
Further, also include that internal resistance receiver module, described internal resistance receiver module communicate with internal resistance output module Connect.Internal resistance receiver module can receive the electricity containing accumulator internal resistance information of the radiant body radiation of printed antenna Magnetostatic wave signal.
Further, also include linear modulate circuit and electric bridge, described linear modulate circuit and electric bridge series connection, The input of described linear modulate circuit connection mode number converter, electric bridge connects accumulator.
After using technical scheme described in the utility model, bring following beneficial effect:
1, electric capacity described in the utility model can store energy for other moulds the most again as load Block uses, and the most not only measures simple, does not the most cause the waste of the energy.
2, analog-digital converter described in the utility model can convert analog signals into digital signal output, it is simple to Obtain information of voltage and the current information of accumulator, information of voltage and current information are passed to other functions simultaneously Module processes.
3, microprocessor described in the utility model has volume advantage little, lightweight, can control simultaneously Charge switch and/or the cut-off/close of discharge switch, without manual operation, decrease the introducing of personal error; Furthermore it is also possible to accept the voltage and current information that data acquisition module obtains, calculate storage by internal processes The internal resistance of battery.
4, the internal resistance information that microprocessor calculates can directly be exported by internal resistance output module of the present utility model, Decreasing the accumulation of error in transmittance process, operator can obtain the internal resistance information of accumulator intuitively simultaneously, Understand the state of accumulator in time.
Accompanying drawing explanation
Fig. 1: this utility model one wind power generating set accumulator internal resistance monitoring modular.
Wherein: 1, accumulator, 2, wire, 3, electric bridge, 4, linear modulate circuit, 5, stand-by power supply, 6, Analog-digital converter, 7, microprocessor, 8, radio-frequency communication module, 9, printed antenna, 10, charge switch, 11, discharge switch, 12, load, 13, electric capacity.
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is further introduced.
As shown in Figure 1: a kind of wind power generating set accumulator internal resistance monitoring modular, including: accumulator 1, fill Electric switch 10, discharge switch 11, load 12, data acquisition module and wire 2, described load 12 is electricity Holding 13, described charge switch 10 and electric capacity 13 are connected with accumulator 1 by wire 2, described electric discharge Switch 11 and electric capacity 13 are connected with data acquisition module by wire 2.Electric capacity can again can as load simultaneously Enough energy is stored for other modules, the most not only measure simple, can avoid using electric capacity simultaneously The waste of accumulator electric-quantity when other outer dissipative load are tested.
Described data acquisition module is the analog-digital converter 6 that analogue signal is converted into digital signal.Modulus turns Parallel operation 6 can gather the voltage and current information of accumulator when accumulator internal resistance is tested, it is simple to carries out accumulator Internal resistance calculate.
Monitoring to control the internal resistance of accumulator, this utility model includes controlling computing module, described control meter Calculate module and connect the outfan of data acquisition module.Control computing module on the one hand to be controlled by internal processes Being opened or closed of charge switch and/or discharge switch, on the other hand can accept what data acquisition module obtained Voltage and current information, calculates the internal resistance of accumulator by internal processes.
This utility model also includes internal resistance output module and internal resistance receiver module, described internal resistance output module and institute The control computing module series connection stated, described internal resistance receiver module communicates to connect with printed antenna 9.Internal resistance receives Module can receive the electromagnetic wave signal containing accumulator internal resistance information of the radiant body radiation of printed antenna 9.In Resistance output module is for obtaining the internal resistance information controlling the accumulator that computing module calculates and internal resistance information being passed Pass internal resistance receiver module.
The testing procedure implementing measurement internal resistance change is:
A, first closing the discharge switch 11 of electric capacity, disconnect charge switch 10, the electricity of electric capacity 13 storage passes through Discharge switch 11 and wire 2 pass to control computing module until the electricity of electric capacity 13 discharges;
B, after electric capacity electricity discharges, disconnect discharge switch 11, close charge switch 10, accumulator is by filling Electric capacity 13 is charged by electric switch 10, analog-digital converter record battery tension V1;
C, disconnection charge switch 10, analog-digital converter record disconnects in transient current I and the accumulator of moment Instantaneous voltage V2;
D, R=(V2-V1)/I, can calculate the internal resistance of accumulator.
The testing procedure of this accumulator internal resistance is possible not only to test the impact internal resistance of accumulator, it is also possible to test electric power storage The dynamic internal resistance in pond.
When test impact internal resistance, microprocessor control accumulator and produce surge voltage and electric current, according to internal resistance Computing formula both can calculate the impact internal resistance of accumulator, and impact internal resistance can the resistance of response system well Wear performance.
When testing dynamic internal resistance, microprocessor controls accumulator and produces dynamic electric voltage and electric current, according to internal resistance meter Calculate formula and can calculate dynamic internal resistance.Dynamically internal resistance can react the behavior pattern of accumulator well.
Embodiment one
The analog-digital converter 6 of the present embodiment is 16 high-precision adcs.Can obtain more accurate Information of voltage and current information, thus obtain accumulator internal resistance accurately.
Embodiment two
Control computing module described in the present embodiment is microprocessor 7.Microprocessor 7 can realize controlling to calculate The function of two aspects of module, has volume little simultaneously, lightweight advantage.
Embodiment three
Internal resistance output module described in the present embodiment is radio-frequency communication module 8 and printed antenna 9, described radio frequency The input of communication module 8 connects the outfan controlling computing module, and radio-frequency communication module 8 connects printed antenna The signal feed-in part of 9, the radiant body of printed antenna 9 for containing the electricity of accumulator internal resistance information to external radiation Magnetostatic wave signal.The volume of printed antenna is little, and processing technology is relatively easy, meets in wind-driven generator group storage battery The demand of the miniaturization in resistance monitoring.
Embodiment four
On the basis of above-described embodiment, in the present embodiment, a kind of wind power generating set accumulator internal resistance monitoring mould Block can also include stand-by power supply 5, stand-by power supply in accumulator electric-quantity deficiency etc. in particular cases to micro-place Reason device 7 is powered.Also include stand-by power supply 5, described stand-by power supply 5 and accumulator 1 and control computing module Series connection.Stand-by power supply in accumulator electric-quantity deficiency etc. in particular cases to microprocessor power supply.
Embodiment five
On the basis of above-described embodiment, in the present embodiment, a kind of wind power generating set accumulator internal resistance monitoring mould Block also includes linear modulate circuit 4 and electric bridge 3, and described linear modulate circuit 4 and electric bridge 3 are connected, described The input of linear modulate circuit 4 connection mode number converter 6, electric bridge 3 connects accumulator 1.
The foregoing is only preferred implementation of the present utility model, it is noted that for the common skill of this area For art personnel, without departing under this utility model principle premise, it is also possible to make various deformation and improvement, this Also protection domain of the present utility model should be considered as.

Claims (10)

1. a wind power generating set accumulator internal resistance monitoring modular, including: accumulator, charge switch, discharge switch, load, it is characterized in that: described load is electric capacity, described charge switch and electric capacity are connected with accumulator, and described discharge switch and electric capacity are connected with data acquisition module.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 1, it is characterised in that: described data acquisition module is the analog-digital converter that analogue signal is converted into digital signal.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 2, it is characterised in that: described analog-digital converter is 16 high-precision adcs.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 1, it is characterised in that: also including controlling computing module, the described computing module that controls connects the outfan of data acquisition module.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 4, it is characterised in that: described control computing module is microprocessor.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 4, it is characterised in that: also include that stand-by power supply, described stand-by power supply are connected with accumulator and control computing module.
7. according to the arbitrary described a kind of wind power generating set accumulator internal resistance monitoring modular of claim 4-6, it is characterised in that: also include that internal resistance output module, described internal resistance output module are connected with described control computing module.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 7, it is characterized in that: described internal resistance output module includes radio-frequency communication module and printed antenna, the input of described radio-frequency communication module connects the outfan controlling computing module, the outfan of described radio-frequency communication module connects the signal feed-in part of printed antenna, and the radiant body of printed antenna for containing the electromagnetic wave signal of accumulator internal resistance information to external radiation.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 7, it is characterised in that: also include that internal resistance receiver module, described internal resistance receiver module communicate to connect with internal resistance output module.
A kind of wind power generating set accumulator internal resistance monitoring modular the most according to claim 1, it is characterized in that: also include linear modulate circuit and electric bridge, described linear modulate circuit and electric bridge series connection, described linear modulate circuit connects data acquisition module, and electric bridge connects accumulator.
CN201620057142.6U 2016-01-20 2016-01-20 Wind generating set holds internal resistance of cell monitoring module CN205539202U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108377013A (en) * 2018-03-06 2018-08-07 内蒙古久和能源装备有限公司 The management method of pitch-controlled system stand-by power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108377013A (en) * 2018-03-06 2018-08-07 内蒙古久和能源装备有限公司 The management method of pitch-controlled system stand-by power supply

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