CN106357009B - A kind of self-energizing supply unit for status of electric power detection sensor - Google Patents
A kind of self-energizing supply unit for status of electric power detection sensor Download PDFInfo
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- CN106357009B CN106357009B CN201610928350.3A CN201610928350A CN106357009B CN 106357009 B CN106357009 B CN 106357009B CN 201610928350 A CN201610928350 A CN 201610928350A CN 106357009 B CN106357009 B CN 106357009B
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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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Abstract
The invention discloses a kind of self-energizing supply units for status of electric power detection sensor, including voltage taking energy unit, current energy-taking unit, energy-storage units and energy storage control unit；The voltage taking energy unit, current energy-taking unit separately or concurrently obtain high voltage, low current energy from power equipment, realize that low-voltage, high current are converted, and carry out power storage by the energy-storage units；When the operating of status of electric power detection sensor needs electric energy, the energy storage control unit control energy-storage units provide electric energy for status of electric power detection sensor；When the not enough power supply of the energy-storage units, the energy storage control unit closes discharge loop in time, and the energy storage control unit continues energy storage.At low cost, long working life of the invention, can provide reliable energy supply for sensor.
Description
Technical field
The present invention relates to a kind of self-energizing supply units for status of electric power detection sensor, belong to power equipment
State inspection field.
Background technology
State Grid Corporation of China proposes strong intelligent grid, i.e., is sent out by bulk transmission grid, electric network coordination at different levels of extra-high voltage grid
It is support with communication information platform based on the strong rack of exhibition, there is information-based, automation, interactive feature, including electric power
The power generation of system, transmission of electricity, power transformation, six big links of distribution, electricity consumption and scheduling, cover all voltage class, realize " flow of power, letter
The very high integrity fusion of breath stream, Business Stream ", has strong reliable, economical and efficient, clean environment firendly, transparent opening and close friend mutual
The modern power network of dynamic intension.
The core of intelligent grid is Internet communication technology and existing network system to be interconnected to realize the intelligence of power grid
Change, covers the acquisition of data, data transmission, information integration, optimize, show 5 aspects, therefore, sensing coupling, communication, control
Etc. new technologies be in the form and Operation of Electric Systems pattern for not changing existing power grid, also be continuously improved and optimize power grid fortune
Row state and developing direction.
Sensor is the key element of intelligent grid.Need to install big quantity sensor in power grid so as to acquisition system state
Parameter and equipment " health " situation, and the process integration such as collected real time information and resource management, simulation and emulation, it will
Valid data are transmitted to control room, to improve operation and the efficiency of power grid.
Sensor type is varied, in engineering using it is more have it is following several：Traditional electric power mutual-inductor takes station
Electricity consumption by high pressure, high current conversion becomes low pressure, low current, extract voltage, electric current, power, frequency, power factor (PF), phase angle,
The physical parameters such as harmonic wave；Another sensor is directly powered by external cell realizes the work of sensor, including equipment
RFID tag, GPS positioning sensor, temperature sensor, Leakage Current sensor, vibrating sensor etc.；Fibre optical sensor utilizes
The good characteristic of optical fiber insulation characterisitic converts electrical signals to optical signal, and being transmitted to low-pressure side by optical cable carries out data acquisition
's；Also the principle produced electricl energy using laser irradiation photovoltaic cell supplies energy for sensor.
It stands under power supply power supply mode, needing to be laid with special current supply circuit, and usually single takes voltage or electric current is made
For energy source, power supply reliability is low.
Battery powered mode is affected by extraneous factor, according to China's standard, valve controlled sealed lead-acid accumulator electric discharge
When, if temperature is not normal temperature (25 DEG C), need that the practical electricity that electricity is converted into standard will be surveyed, i.e.,：
Ce=Cr/ [1+K (t-25)]
In formula：Ce --- practical electricity；
Cr --- battery discharge capacity under non-standard temperature；
The environment temperature of t --- electric discharge；
K --- temperature coefficient；K=0.006/ DEG C when 10 hour rate capacity test, K=when 3 hour rate capacity test
0.008/ DEG C, K=0.0085/ DEG C when 2 hour rate capacity test, K=0.01/ DEG C when 1 hour rate capacity test.
It is 25 DEG C that analysis, which can obtain valve controlled sealed lead-acid accumulator optimum working temperature,.Temperature be more than after 25 DEG C capacity open again
Beginning is drastically reduced.After 60 DEG C, the service life of battery is greatly reduced.In addition device temperature is very high under high current operating mode, this for
Also very fatal using the sensor of battery, high temperature can cause battery gently then to reduce service life, heavy then cause battery leakage very
To explosion.Liquid in battery is good conductor, and leakage, explosion can all cause high voltage equipment insulation damage to cause short trouble.
Fibre optical sensor key link is the conversion sensor that physical quantity is converted to optical signal, the photoelectricity of most of physical quantity
Sensor is not succeeded in developing also, and the acquisition system cost of light-electricity conversion sensor is higher, and general equipment is difficult to advise greatly
Mould uses.Engineer application it is more have temperature grating sensor and vibration optical sensor.There is a method in which using traditional biography
Feel collecting signal, optical signal is then converted electrical signals to by photoelectric converter, low-pressure side is sent to by optical fiber.But in height
Pressure side still needs power supply to support sensor and photoelectric converter work.
Electric energy is converted laser light into, and for working sensor, principle is electricity to be converted by the high power laser pipe of low-pressure side
For laser beam, high-pressure side is sent to by optical fiber.There are LASER Discharge Tube and photovoltaic cell in high-pressure side, and laser irradiation is in photovoltaic cell
On, battery converts light to direct current and is used for relevant device, and power is smaller, can generally provide 5V, 100mA both 500mW
Power.Its existing main problem is：First, cost is high, purchase cost is often ten times even two of sensor purchase cost
Ten times, economic implications is lost；Second is that installation is not easy, it is put into low-pressure side from high-pressure side by optical fiber cloth, quantities is very huge
Greatly, it due to being laid in equipment appearance, is easy to be damaged；Third, power is low, maximum can only provide the power of 5V, 100mA, less than big
The power requirement of operative sensor may be only available for fraction sensor.
Invention content
In view of the deficienciess of the prior art, the present invention provide it is a kind of it is at low cost, long working life be used for power equipment
The self-energizing supply unit of state detection sensor provides reliable energy supply for sensor.
To achieve the goals above, the present invention is to realize by the following technical solutions：
A kind of self-energizing supply unit for status of electric power detection sensor of the present invention, including voltage take energy single
Member (structure be one layer of aluminium foil film of insulation package, as coupled voltages pole plate, and conventional capacitance coupling plates indifference, thus
The voltage taking energy unit of the present invention repeats no more), current energy-taking unit, energy-storage units and energy storage control unit；The voltage takes
Energy unit, current energy-taking unit separately or concurrently obtain high voltage, low current energy from power equipment, pass through the energy-storage units
It realizes low-voltage, high current conversion, and carries out power storage；When the operating of status of electric power detection sensor needs electric energy,
The energy storage control unit control energy-storage units provide electric energy for status of electric power detection sensor；When the energy-storage units
When not enough power supply, the energy storage control unit stops electric discharge in time, and (discharge loop is exactly the connecting line of sensor and energy-storage units
Road is exactly both threads in simple terms, and energy storage control unit itself has on-off action, controls the circuit on-off, and then realize electric discharge
The break-make in circuit), the energy storage control unit continues energy storage.
Above-mentioned voltage taking energy unit, current energy-taking unit are separately or concurrently as follows to the method for energy-storage units charging：It is described
Voltage taking energy unit and current energy-taking unit after being coupled to alternating voltage and electric current, first carry out halfwave rectifier, using voltage-stabiliser tube
Adjust output voltage amplitude, finally respectively by diode-isolated after, access the energy-storage units.
Above-mentioned energy-storage units include voltage-stabiliser tube, be connected in parallel on the filter capacitor at the voltage-stabiliser tube both ends, one with filter capacitor
Switching tube that a pole plate is connected, the inductance being in series with the switching tube other end, the capacitance being connected with the inductance other end, parallel connection
Storage capacitor at capacitance both ends, another pole plate of the capacitance are connected with another pole plate of filter capacitor, the electricity
Sense forms lc circuit with capacitance；The switching tube is cascaded by two-stage bidirectional high pressure diac, passes through voltage difference of the two ends
Control conducting；The voltage obtained by the voltage stabilizing tube steady voltage taking energy unit, current energy-taking unit, and to the filtered electrical
Capacity charge, after the both ends of filter capacitor voltage reaches rated voltage, the switching tube conducting then passes through the lc circuit
Energy storage is carried out to storage capacitor.
The diversion belt that above-mentioned current energy-taking unit includes iron core and is spirally wrapped on iron core.
Above-mentioned iron core is the flexible ferromagnetic material sintered into using nickel-manganese-zinc-iron；The length of iron core is 20cm, width is
2cm, thickness 2mm；The width of the diversion belt is 4mm, thickness 3mm, and 2mm is divided between winding.
Above-mentioned energy storage control unit include low pressure difference linear voltage regulator, voltage checking chip, first diode D1~D3 and
Second diode D4；No. 1 pin of the low pressure difference linear voltage regulator is voltage input end, and No. 3 pins are voltage output end, 2
Number pin foot in order to control, No. 4 pins ground connection；When No. 1 pin voltage of the voltage checking chip is greater than the set value, No. 2 pipes
Foot exports high level, and when No. 1 pin voltage is less than setting value, No. 2 pins export low level, No. 3 pin ground connection；Described first
Diode D1~D3 is connected between No. 1 pin of low pressure difference linear voltage regulator and No. 1 pin of voltage checking chip, described low
No. 2 pins of pressure difference linear voltage regulator are connected with No. 2 pins of voltage checking chip, and the second diode D4 is connected to low
Between No. 3 pins of pressure difference linear voltage regulator and No. 1 pin of voltage checking chip.
Above-mentioned first diode D1~D3 is specifically using silicon diode, and the second diode D4 is specifically using germanium two
Pole pipe.
Energy is obtained using the electromagnetic field of high-tension electricity equipment itself, possesses two sets of acquisitions of voltage, electric current of parallel running
The system of energy, both can be under high-voltage case using isolated coupling electrode principle collection voltages energy, can be in high current situation
Energy is obtained in the high current flowed through from equipment according to electromagnetic induction principle, two taking energy units work independently, do not interfere with each other, from
And regulated power is provided with sensor for high-tension apparatus.Its core cell includes：
Voltage taking energy unit, current energy-taking unit, energy-storage units and energy storage control unit
One, voltage taking energy unit
The core equipment that isolated coupling electrode obtains electric field energy from high voltage electric field is the isolated coupling of isolated coupling electrode
Electrode can be exchanged into electric energy after getting space charge, and what is obtained at this time is high voltage, low current signal.
Conductor in electric field obtains unit potential institute electricity demand, the geometric properties (size and shape) of size and conductor
It is related.If isolated coupling electrode carried charge is q, potential V, experiments have shown that q ∝ V, i.e. q=CV.C is capacitance, unit farad, it
The geometric properties (size and shape) of expression conductor acquisition unit potential institute electricity demand, size and conductor are related.
Aluminum laminated films are laid in the flexible iron core surface of current energy-taking unit, and insulation is used in combination to wrap up, it is ensured that aluminium foil film with
Electric insulation is realized between iron core, power equipment.The film is the isolated coupling electrode of voltage taking energy unit, will by conducting wire
The electric energy being coupled on film is transferred to subsequent processing module.
Two, electric current acquiring unit has following key link：
Using on conventional current mutual inductor basis, there are two technological break-throughs for present invention tool：
1, flexible iron core
Engineer application is the results show that when the iron core thickness is 1mm, when the electric current in power equipment only needs 12A, iron core
It is rapidly saturated, ensures that the unit can be saturated rapidly in normal work, avoid the abnormal heating under high current operating mode.
2, water conservancy diversion copper wire is encapsulated on iron core
Using printed circuit board process, spirally winding is used for the copper diversion belt of electromagnetic coupling on iron core, this is led
Bandwidth 4mm, thickness 3mm are flowed, is spaced 2mm, and be packaged.
Take above-mentioned measure so that the current energy-taking unit volume is small, perfect heat-dissipating, and softness is similar with plastics,
It can easily be wrapped in equipment.
Three, energy-storage units
1, switching tube
Switching tube is one of the technology of the present invention core, realizes high-voltage electricity, weak current being converted to low-voltage, high current.
The present invention completes the effect of switching tube using two-stage bidirectional high pressure diac.When the voltage reserve of capacitance reaches specified electricity
After pressure, the conducting of high pressure diac.Circuit carries out energy storage, decompression by lc circuit to storage capacitor.It realizes high voltage
(220V~3000V), weak current are converted to the DC power supply of direct current 10V, 200mA, to have the function that Switching Power Supply.
2, energy-storage travelling wave tube
Electric current takes electricity and voltage electricity getting device that electricity is transported to energy-storage units, and chargeable lithium electricity can be considered in general circuit
Pond either super capacitor or other capacitances.
If device needs to be operated in 10kV voltage class, select patch solid tantalum capacitance as storage capacitor.Because of 10kV
The power limited that voltage class obtains, if selecting rechargeable battery or super capacitor, Leakage Current is very big, when can cause energy storage
Between very long, the other restricted lifetime of rechargeable battery, if selecting rechargeable battery that can influence service life of equipment.
It is to reveal very small, only 1uA to select tantalum capacitance one；Second is that since tantalum capacitance does not have electrolyte, so failure rate
Very low, the service life is permanent.
Four, energy storage control unit
Voltage control valve is served as using low pressure difference linear voltage regulator (LDO, voltage control chip), i.e., when voltage reserve to compared with
When high level, low pressure difference linear voltage regulator is opened, load is allowed to obtain power supply.Low pressure difference linearity is closed when storage element energy deficiency
Voltage-stablizer allows load to lose power supply, and energy-storage units is made to charge.
The purpose for selecting voltage control chip is better energy storage, improves tank voltage threshold.Such as equipment normal work
When 3.3V, voltage chips may require that just opens LDO (low pressure difference linear voltage regulator) chip after energy storage reaches 5.8V.When voltage is less than
After 3.3V, control chip should turn off LDO chips.So increasing voltage feedback circuit in circuit.
The present invention relatively has following advantage with traditional supply unit：
1. long working life.Most long-acting lithium battery only has 5 years or so service life.And the present invention can reach and once
The identical service life of equipment provides reliable energy supply for related sensor, and power is high；
2. both energy can be obtained by voltage, also energy can be obtained by electric current.It is simple that energy is taken using current transformer
Method, can not cope with does not have the operating mode of electric current in circuit, and the present invention can effectively solve the problems, such as this；
3. being operated in high pressure equipotential pattern, do not insulate hidden danger.On high-tension apparatus, insulation and electric field are not destroyed
Distribution.Whole device volume is very small and exquisite, can arbitrarily be arranged according to equipment shape.There is no high-low pressure contact, is operated in equal electricity
Bit pattern, therefore without insulation hidden danger, and be easily installed.
4. it is cheap, convenient for promoting.The present invention relates to component select ripe device, only device is revealed
Electric current, working life have strict demand.So apparatus cost is cheap, cost only has the one thousandth of laser energy taking device.
Description of the drawings
Fig. 1 is high-tension apparatus sensor self-energizing supply unit schematic diagram；
Fig. 2 is that voltage obtains energy unit logic chart；
Fig. 3 is energy-storage units schematic diagram；
Fig. 4 is energy storage control unit schematic diagram (LDO is low pressure difference linear voltage regulator).
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
The present invention provides a kind of self-energizing supply unit for status of electric power detection sensor, which utilizes height
The electromagnetic field of voltage electrical equipment itself obtains energy, possesses the system of two sets of acquisition electric energy of voltage, electric current of parallel running, both may be used
It, can be in high current situation according to electromagnetism sense using coupled capacitor principle according to the voltage acquisition energy of equipment under high-voltage case
The electric current that principle is flowed through from equipment is answered to obtain energy, to supply energy for status of electric power detection sensor.
Energy-storage units are voltage taking energy unit and current energy-taking units shared unit with energy storage control unit.Energy-storage units will
The energy reserve that taking energy unit obtains gets up to be used for sensor.When energy storage control unit needs energy when sensor operation,
Control unit is opened in time, and energy-storage units will provide electric energy for sensor；When the not enough power supply of energy storage device, energy storage control is single
First closing control unit, energy storage control unit in time continue energy storage.
The present invention comprehensively utilizes two sets of energy capturing systems, extends the power work service life so that the work longevity of sensor
Life is more than equipment interruption maintenance gap periods, improves power supply reliability；And got in touch with without high-low pressure, it is operated in equipotential mould
Formula eliminates insulation hidden danger, cheap, realizes economic, the reliable supply of sensor electric energy, has to practical application good
Directive significance.
High-tension apparatus asks for power supply schematic diagram as shown in Figure 1, it will be seen from figure 1 that the present invention is by four part groups
At that is,：Voltage taking energy unit, current energy-taking unit, energy-storage units and energy storage control unit.Separately below from aforementioned four part
Power supply is asked for high-tension apparatus with sensor to be introduced, although this device is to monitor to pass for electric system high-tension apparatus
Sensor proposes, but has general.
Core of the invention is the voltage acquisition energy according to equipment using coupled capacitor principle, former according to electromagnetic induction
Reason, the electric current flowed through from equipment obtain energy.The present apparatus possesses the system parallel running of two sets of voltage, electric current acquisition energy, i.e.,
Segregated capacitive principle can be utilized according to the voltage acquisition energy of equipment under high-voltage case, it can be in high current situation according to electromagnetism
The electric current that principle of induction is flowed through from equipment obtains energy, referring to Fig. 1.
One, voltage taking energy unit
There are powerful high voltage electric fields for high-tension apparatus, and the core that energy is this programme is obtained from high voltage electric field.Popular
Say to be exactly the means that energy is obtained by voltage.The core equipment for obtaining electric field energy is isolated coupling electrode.If coupled capacitor
Body carried charge is q, potential V, experiments have shown that q ∝ V, i.e. q=CV.C is capacitance, and unit farad, it indicates that conductor obtains unit
The geometric properties (size and shape) of potential institute electricity demand, size and conductor are related.
Assuming that coupling capacitor plates are spherical conductor, radius R carries electricity q, then potential is：
Then capacitance：
Coupled capacitor body can be exchanged into electric energy after getting charge, and capacitance body obtains high voltage, weak current at this time.Electricity
The residing voltage class of volume itself is related with itself volume and radius, according to engineering experience, the orphan of a matchbox size
Vertical coupling electrode is under 10kV voltage class, and for voltage in 4kV or so, current value about 10uA or so, power is about 0.04W.If
It is 110kV, then the voltage that capacitance body obtains is about in 60kV or so, and electric current is about 10uA, and power is about 0.6W.
Traditional switching tube pressure resistance only has 1000V, and most fatal is that power consumption is larger, and static leakage electric power is all in 1mA or so.
Actual circuit can not but be realized with common switching tube, it is necessary to use unique circuit design just can be with.
Energy-storage units are one of the technology of the present invention cores, realize high-voltage electricity, weak current being converted to low-voltage, big electricity
Stream.The present invention completes the effect of switching tube using bidirectional high-pressure diac.When the voltage reserve of capacitance reaches specified electricity
After pressure, the conducting of high pressure diac.Circuit carries out energy storage, decompression by lc circuit to storage capacitor.It realizes high voltage
(220V~3000V), weak current are converted to the DC power supply of direct current 10V, 200mA or so, to reach the work of Switching Power Supply
With.
As shown in figure 3, in figure：1, voltage-stabiliser tube；2, filter capacitor；3, switching tube；4 inductance, 5 capacitances form lc circuit；6、
Storage capacitor (tantalum capacitance).Wherein, switching tube is cascaded by two-stage high pressure diac, is led by voltage difference of the two ends control
It is logical.
The voltage obtained first by 1 burning voltage taking energy unit of voltage-stabiliser tube, current energy-taking unit, and to filter capacitor 2
Charging.After 2 both end voltage of filter capacitor reaches rated voltage, switching tube 3 is connected, then by lc circuit to storage capacitor 6
Carry out energy storage.By high voltage (220V~3000V), weak current is converted to the DC power supply of direct current 5V, 20mA or so.To reach
To the effect of Switching Power Supply.
The energy-storage units scheme of the present invention has following advantages：
● power consumption is extremely low.Number of devices is few, and selects low power dissipation design.The oneself power consumption of device is extremely low.Static Electro
Stream is almost 0, and maximum is no more than 1.4uA.
● reliability is high.Conventional electronics weakest link is Switching Power Supply, because of the component number of Switching Power Supply
It is more, and be operated under high current, high voltage, high-frequency situation, it is easiest to break down.The present invention is using simple double
Simple Switching Power Supply had both been constituted to high pressure diac cooperation capacitance, inductance.Therefore reliability is high.Service life is that tradition is opened
Tens times of powered-down source；
● extremely low cost.It is less to constitute device, and is all common component, therefore is of low cost, has good
Promotional value；
Two, current energy-taking unit
Current energy-taking unit utilizes conventional current mutual inductor principle, but there are two technological cores outstanding.Technological core
First, traditional current transformer is done very small and exquisite, technological core is second is that iron core should be able to be saturated rapidly, and avoid high current
It generates heat under operating mode.
Iron core manufacture craft avoids that conventional current mutual inductor is bulky, problem difficult to install.The present invention utilize at
It is divided into the ferromagnetic material of nickel-manganese-zinc-iron, the flexible iron core that length is 20cm, width 2cm, thickness are 2mm, magnetic conduction is made
Rate is 1000 times of traditional silicon steel so that the unit volume is smaller, is the 1/100 of the conventional current mutual inductor volume of same capacity.
The material is flexible material, and softness is similar with plastics, it may be convenient to be wrapped in equipment；It is provided simultaneously with good magnetic flux
Characteristic is 1000 times of traditional silicon steel, can also be rapidly saturated.Engineering experience proves that the iron core thickness of the invention only has 2mm,
Electric current only needs 12A that can be rapidly saturated.
After getting electric current, energy-storage units, the circuit and voltage induced partial common circuit are entered after over commutation, is all divided
Energy-storage units are not transmitted its energy to.
Three, energy-storage units, energy storage control unit
Energy storage is voltage acquisition and current conversion unit sharing unit with energy storage control.Voltage obtains energy unit logic chart
As shown in Figure 2.Energy-storage units get up transformed energy reserve to be used for sensor；Lock of the energy storage control unit similar to dam
Door, tricklet deposit is got up, starting gate when sensor needs, the timely closed shutter when energy storage device deficiency
Continue energy storage.
1, energy-storage units
Electric current obtains electric energy and electricity is transported to energy-storage module by voltage taking energy unit, and general circuit can be considered chargeable
Lithium battery either super capacitor or other capacitances.If device needs to be operated in 10kV voltage class, it is proposed that energy-storage module is selected
Tantalum capacitance.Because the power limited that 10kV voltage class obtains, if selecting rechargeable battery or super capacitor, Leakage Current is very
Greatly, energy storage time can be caused very long, in addition the restricted lifetime of rechargeable battery, if selecting rechargeable battery that can influence equipment uses the longevity
Life.Tantalum capacitance first is selected the reason is that revealing very small, only 1uA；Second the reason is that since tantalum capacitance does not have electrolyte, institute
Very low with failure rate, the service life is permanent.
2, energy storage control unit
The voltage of energy-storage travelling wave tube slowly rises to loaded work piece voltage from " zero " and needs a longer time course.Such as
Fruit can cause the hunting of load to work without voltage control.It causes the voltage of energy-storage travelling wave tube to float up and down in standard value, loads nothing
Method works normally.Therefore a control circuit is needed to ensure that load obtains enough energy.
Energy storage control unit schematic diagram as shown in figure 4, the control circuit control LDO chips (low pressure difference linear voltage regulator),
When voltage reserve is to high value, LDO is opened, load is allowed to obtain power supply.LDO is closed when storage element energy deficiency.
1) to the description of Fig. 4
● LDO is low-pressure linear voltage-stablizer.1 pin is voltage input end.Allow 3.3~9V of input voltage range；3 pins
For voltage output end.Output voltage is 3.3V；2 pins foot in order to control.When input high level, LDO works, and works as input low level
When LDO close.
● D1~D3 is silicon diode, and D4 is that germanium diode pressure drop is 0.3V.
● HT2027 2.7V voltage checking chips.When 1 pin voltage is more than 2.7V, 2 pins export high level 2.7V,
When 1 pin voltage is less than 2.7V, 2 pins export low level.
2) the specific operation principle of the circuit.
VoutLoaded work piece voltage is 3.3V below.The operating voltage range of Vin is 0~5.6V.If this control electricity
Road, VoutLoad will be unable to work below.The energy at the ends Vin is very small, can only provide very faint electric energy.Faint electric energy
It is stored in capacitance.The voltage that voltage lifting step by step can work to chip, chip are started to work corresponding but without completing
Programmed logic, system voltage are collapsed by drawing, the state that can not be worked down to chip.But voltage is only slightly lower than cleaning door at this time
Sill voltage, so chip is started to work quickly again.But the limited energy of capacitance storage, and collapsed by drawing.Repeatedly.In order to solve
Thus this circuit of this problem generates.The purpose of its core is exactly that capacitance is allowed to lay in some electric energy more.When capacitance voltage is less than one
Energy supply circuit is closed when setting value.
The ends Vin are due to having storage capacitor, input voltage to be stepped up, when reaching 4.8V (tri- diodes of HT70272.7V+
PN saves 3*0.7=4.8V).The 2 pins output high level LDO start-up operations Vout of HT7027 exports 3.3V at this time.Due to load
Capacitance voltage is caused to gradually reduce.After 4.8V, the control foot high level of LDO cannot be maintained by D1~D3, needed
D4 diodes are wanted to complete Voltage Feedback.Vout pressure drops after D4 are maintained to 3V.2 pins of HT7027 export always height
Level.LDO continue workings are after Vin is less than 3.3V, LDO automatic cut-offs.Capacitance starts energy storage at this time.
The purpose for selecting voltage control chip in this circuit is better energy storage, improves tank voltage threshold.Such as
3.3V when equipment works normally, voltage chips may require that just opens LDO chips after energy storage reaches 5.8V.When voltage is less than 3.3V
Afterwards, control chip should turn off LDO chips.So increasing voltage feedback circuit in circuit.
LDO has played the effect of voltage control valve, and which obviate energy deficiencies to cause equipment oscillatory work.Such as energy storage is rigid
Just reach equipment operating voltage, equipment is started to work, and due to energy reserve deficiency, operating voltage is pulled low, and is less than equipment
Normal operational voltage value minimum, causes equipment to be stopped.Device starts energy storage again, and energy storage just reaches operating voltage, if
It is standby to start to work again.It so causes to vibrate repeatedly.
The present invention relatively has following advantage with traditional power technology：
1. long working life.Most long-acting lithium battery only has 5 years or so service life.And the present invention can reach and once
The identical service life of equipment.Reliable energy supply is provided for related sensor；
2. both energy can be obtained by voltage, also energy can be obtained by electric current.Current transformer, which takes, can not cope with electricity
There is no the operating mode of electric current in road, and the present invention can effectively solve the problems, such as this；
3. being operated in high pressure equipotential pattern, do not insulate hidden danger.On high-tension apparatus, insulation and electric field are not destroyed
Distribution.Whole device volume is very small and exquisite, can arbitrarily be arranged according to equipment shape.There is no high-low pressure contact, is operated in equal electricity
Bit pattern, therefore without insulation hidden danger.
4. it is cheap, convenient for promoting.The present invention relates to component select ripe device, only device is revealed
Electric current, working life have strict demand.So apparatus cost is cheap, cost only has the one thousandth of laser energy taking device.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of self-energizing supply unit for status of electric power detection sensor, which is characterized in that take energy including voltage
Unit, current energy-taking unit, energy-storage units and energy storage control unit；
The voltage taking energy unit, current energy-taking unit separately or concurrently obtain high voltage, low current energy from power equipment, lead to
It crosses the energy-storage units and realizes low-voltage, high current conversion, and carry out power storage；
When the operating of status of electric power detection sensor needs electric energy, the energy storage control unit control energy-storage units are electric power
Condition Detection sensor provides electric energy；When the not enough power supply of the energy-storage units, the energy storage control unit is stopped in time
It only discharges, the energy storage control unit continues energy storage；
The energy-storage units include voltage-stabiliser tube, are connected in parallel on the filter capacitor at the voltage-stabiliser tube both ends, a pole with filter capacitor
Switching tube that plate is connected, the capacitance being connected with the inductance other end, is connected in parallel on electricity at the inductance being in series with the switching tube other end
Hold the storage capacitor at both ends, another pole plate of the capacitance is connected with another pole plate of filter capacitor, the inductance with
Capacitance forms lc circuit；
The switching tube is cascaded by two-stage bidirectional high pressure diac, is controlled and is connected by voltage difference of the two ends；
The voltage obtained by the voltage stabilizing tube steady voltage taking energy unit, current energy-taking unit, and filled to the filter capacitor
Electricity, after the both ends of filter capacitor voltage reaches rated voltage, the switching tube conducting, then by the lc circuit to storage
It can capacitance progress energy storage；
The energy storage control unit includes low pressure difference linear voltage regulator, voltage checking chip, first diode D1~D3 and second
Diode D4；
No. 1 pin of the low pressure difference linear voltage regulator is voltage input end, and No. 3 pins are voltage output end, and No. 2 pins are control
Foot processed, No. 4 pin ground connection；
When No. 1 pin voltage of the voltage checking chip is greater than the set value, No. 2 pins export high level, when No. 1 pin electricity
When pressure is less than setting value, No. 2 pins export low level, No. 3 pin ground connection；
The first diode D1~D3 is connected on No. 1 pin of low pressure difference linear voltage regulator and No. 1 pipe of voltage checking chip
Between foot, No. 2 pins of the low pressure difference linear voltage regulator are connected with No. 2 pins of voltage checking chip, and the described 2nd 2
Pole pipe D4 is connected between No. 3 pins of low pressure difference linear voltage regulator and No. 1 pin of voltage checking chip.
2. the self-energizing supply unit according to claim 1 for status of electric power detection sensor, feature exists
In the voltage taking energy unit, current energy-taking unit are separately or concurrently as follows to the method for energy-storage units charging：
The voltage taking energy unit and current energy-taking unit after being coupled to alternating voltage and electric current, first carry out halfwave rectifier, then pass through
Cross voltage-stabiliser tube adjust output voltage amplitude, finally respectively by diode-isolated after, access the energy-storage units.
3. the self-energizing supply unit according to claim 1 for status of electric power detection sensor, feature exists
In the diversion belt that the current energy-taking unit includes iron core and is spirally wrapped on iron core.
4. the self-energizing supply unit according to claim 3 for status of electric power detection sensor, feature exists
In the iron core is the flexible ferromagnetic material sintered into using nickel-manganese-zinc-iron；The length of iron core be 20cm, width 2cm,
Thickness is 2mm；
The width of the diversion belt is 4mm, thickness 3mm；2mm is divided between winding.
5. the self-energizing supply unit according to claim 1 for status of electric power detection sensor, feature exists
In the first diode D1~D3 is specifically using silicon diode, and the second diode D4 is specifically using germanium diode.
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| CN107492942B (en) * | 2017-08-21 | 2023-08-01 | 广东电网有限责任公司云浮供电局 | Device for acquiring electric energy based on step voltage of power transmission line and application method |
| CN107707206A (en) * | 2017-09-28 | 2018-02-16 | 广东欧珀移动通信有限公司 | Radio frequency front-end device, temprature control method and terminal |
| CN108039780B (en) * | 2018-01-30 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Laser energy supply system for transformer substation |
| CN109412212B (en) * | 2018-09-29 | 2022-07-15 | 国网电力科学研究院武汉南瑞有限责任公司 | Two-stage-change cascade high-voltage electric field induction power supply circuit |
| CN109494886A (en) * | 2018-12-28 | 2019-03-19 | 国网山西省电力公司晋中供电公司 | A kind of wireless energy supply system based on electric field induction flat plate array |
| CN110726915B (en) * | 2019-08-28 | 2020-08-18 | 重庆大学 | Modular multilevel converter valve submodule IGBT fault detection system and method |
| CN114325029A (en) * | 2021-12-29 | 2022-04-12 | 国网上海市电力公司 | Full-electric current transformer self-energy-taking circuit and current transformer |
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