CN203774884U - Power supply for high-voltage on-line detection device - Google Patents
Power supply for high-voltage on-line detection device Download PDFInfo
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- CN203774884U CN203774884U CN201420196035.2U CN201420196035U CN203774884U CN 203774884 U CN203774884 U CN 203774884U CN 201420196035 U CN201420196035 U CN 201420196035U CN 203774884 U CN203774884 U CN 203774884U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
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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
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Abstract
The utility model relates to the technical field of the power supply, particularly to a power supply for a high-voltage on-line detection device. A power frequency power supply is processed by AC-DC-AC conversion and frequency demultiplication, high-pass filtering, low-pass filtering, and pushing and amplifying at a low-voltage side to obtain a single-frequency high-frequency electric power and the single-frequency high-frequency electric power is fed into an electric energy sending coil; the electric energy sending coil transmits the electric energy to an electric energy receiving coil by an electromagnetic coupling device; the electric energy receiving coil transmits the received alternating-current electric energy to a direct-current conversion circuit; the direct-current conversion circuit carries out conversion to obtain a direct current and then power is supplied for the high-voltage on-line detection device. On the basis of the magnetic resonance principle, one insulating material is used for manufacturing a resonant cavity and thus reliable transmission of the electric energy from the low-voltage side to the high-voltage side can be realized, thereby ensuring that no direct power connection exists between the high-voltage side and the low-voltage side. Compared with the method of energy transmission by the multi-level structure-based relay transmission coil in the prior art, the provided power supply has characteristics of simple structure, convenient debugging, high reliability and durability, and high transmission efficiency.
Description
Technical field
The utility model relates to power technique fields, is specifically related to a kind of power supply for high pressure on-line measuring device.
Background technology
High pressure on-line measuring device is for detecting and monitor electrical network, the important measures of guaranteeing electric power netting safe running, the demand for development electrical network of intelligent grid has very strong fault self-diagnosis and self-healing recovery ability, this has just proposed very high requirement to the high pressure on-line measuring device of electric power system, high pressure on-line measuring device is in its course of work, in order to realize the isolation completely of the high and low pressure side signal of telecommunication, the working power that high-side signal is processed use must be Floating.
In prior art, the design of this power supply mainly contains two schemes: 1) adopt low pressure sidelight supply power mode, utilize the operation principle of opto-electronic conversion, realize Power supply by heavy caliber optical fiber, its advantage is that power supply is stable, reliability is high, is not subject to the impact of bus current, but the power limited providing due to laser, and the efficiency of opto-electronic conversion is not high yet, photocell is also difficult to ensure in the life-span of operating at full capacity for a long time under condition, and cost is higher etc., and shortcoming can not meet field requirement completely.2) utilize the exist together feature of high-pressure side of working power and transducer, adopt the induction coil of ribbon core directly to obtain the energy from high-tension line.Scheme (2) can reduce the complexity of device and the requirement to insulation, but while there is the too low or circuit breaker trip of line current, high pressure on-line measuring device may be because lacking the inoperable defect of working power.
Application number is that 201210040954.6 Chinese invention patent application discloses " a kind of high-frequency induction of High-Voltage Insulation pass can electric supply installation ", it comprises multiple electromagnetic induction coil L that place along central axial direction, and wherein the electromagnetic induction coil L two ends of below low pressure one side connect the output of a high-frequency drive power supply; The electromagnetic induction coil L two ends of the top high pressure one side connect the input of an AC/DC supply convertor, and remaining electromagnetic induction coil L two ends is all connected with capacitor C; The high-frequency ac electric energy of the characteristic frequency of described high-frequency drive power generation is transferred to high pressure one side by the high-frequency electromagnetic induction resonance of described multiple electromagnetic induction coil L and capacitor C from low pressure one side; Be converted to direct current energy by AC/DC supply convertor again and locate on high-tension side power unit in online examination and controlling equipment, or active photoelectric current transformer energy supply.
But, above-mentioned Energy Transfer is to utilize the method for relay transmission to transmit magnetic field energy to high-pressure side by air, and wireless power transmission efficiency is subject to the restriction of transmission range and the ratio of coil diameter, for realizing long-distance transmissions, it is too little that loop construction size can not be done, so by this application of installation when the real system, may just deposit dimensionally the matching problem with existing insulator inner chamber; In addition, when the relay transmission coil of multilevel hierarchy is applied to high-pressure system, because being the shape of a saddle to the spread voltage of low-pressure side, high-pressure side distributes, so in order to ensure enough insulating capacities, spacing between multistage coil can not be to be uniformly distributed, and like this, also can exert an influence to efficiency of transmission.
Utility model content
The purpose of this utility model is to overcome the low and problem that can not power continually and steadily in useful life that power supply that the high pressure on-line measuring device of prior art uses exists, a kind of power supply for high pressure on-line measuring device is provided, this power supply is simple and practical, life-span is long, stability is high, and reliability is high and conversion efficiency is high.
The purpose of this utility model is achieved through the following technical solutions:
A kind of power supply for high pressure on-line measuring device is provided, and it comprises electric energy transtation mission circuit, electric energy transfer circuit and electric energy receiving circuit; Described electric energy transtation mission circuit comprises low-pressure side AC power and high frequency electric source, described electric energy transfer circuit comprises that electric energy sends coil, electromagnetic coupling device and electric energy receiving coil, described electromagnetic coupling device comprises magnetic core and insulating rod, described insulating rod is the insulating rod of being made up of the insulation magnetic material with permeability, described electric energy sends coil winding in one end of described magnetic core, described electric energy receiving coil is wound in the other end of described magnetic core, described insulating rod is coated described magnetic core, and described insulating rod sends between coil and electric energy receiving coil at described electric energy; Described electric energy receiving circuit comprises ac-dc conversion circuit;
Described low-pressure side AC power is through AC-DC-AC conversion and high frequency electric source successively frequency division, high-pass filtering, low-pass filtering and push away and exempt to amplify the high-frequency electric power that reprocessing obtains single-frequency and send into electric energy transmission coil, electric energy sends coil, by electromagnetic coupling device, electric energy is sent to electric energy receiving coil, and electric energy receiving coil is delivered to ac-dc conversion circuit by the AC energy receiving and is transformed to after direct current as high pressure on-line measuring device is powered.
Preferably, described electric energy sends coil and electric energy receiving coil is all set to enamelled wire, and described magnetic core is set to the ferromagnetic core of high permeability.
Preferably, described high frequency electric source is small-power high-frequency power supply circuit, and it comprises frequency signal generating circuit, high-pass filtering circuit, the low-pass filter circuit connecting successively and pushes away exempts from amplifying circuit.
Another is preferred, and described electric energy transfer circuit also comprises low-pressure side reactive power compensation circuit, and described low-pressure side reactive power compensation circuit is connected to described high frequency electric source and described electric energy sends between coil.
Preferred, described low-pressure side reactive power compensation circuit is series compensation circuit, and described series compensation circuit comprises resistance R p
With Rr, reactive compensation capacitor Cp, inductance L p and Lr, one end of described resistance R p is connected with the output of high frequency electric source, its other end is electrically connected with resistance R r successively with capacitor C p, inductance L p, Lr, and the other end of resistance R r is output, sends coil output signal to electric energy.
Another is preferred, and described low-pressure side reactive power compensation circuit is shunt peaking circuit, and described shunt peaking circuit comprises resistance
Rp and Rr, reactive compensation capacitor Cp, inductance L p and Lr; Described resistance R p is electrically connected successively and forms a branch road with inductance L p, Lr and resistance R r, reactive compensation capacitor Cp is connected in parallel on these branch road two ends and forms described low-pressure side reactive power compensation circuit, one end of described reactive compensation capacitor Cp is connected with the output of high frequency electric source, and the other end of described reactive compensation capacitor Cp sends coil output signal to electric energy.
Preferably, electric energy transfer circuit also comprises high-pressure side reactive power compensation circuit, and described high-pressure side reactive power compensation circuit is connected between described electric energy receiving coil and described electric energy receiving circuit.
Preferred, described high-pressure side reactive power compensation circuit adopts shunt compensation resonant circuit, and it is by resistance R
s, inductance L
s,
Impedance Z
p, building-out capacitor C
scomposition, described resistance R
s, inductance L
swith impedance Z
pelectrical connection forms a branch road, building-out capacitor C successively
sbe connected in parallel on formation high-pressure side, branch road two ends reactive power compensation circuit; One end of described high-pressure side reactive power compensation circuit is connected with electric energy receiving coil, and the other end is electrically connected with ac-dc conversion circuit.
Preferably, described ac-dc conversion circuit comprises rectification filtering voltage stabilizing circuit and constant load translation circuit, the output of high-pressure side reactive power compensation described in the input termination of described rectification filtering voltage stabilizing circuit, the input of constant load translation circuit described in the output termination of described rectification filtering voltage stabilizing circuit, the output of described constant load translation circuit is described high pressure on-line measuring device power supply.
Preferred, described rectification filtering voltage stabilizing circuit comprises rectification circuit and filter circuit, described rectification circuit is made up of the bridge circuit that comprises diode D1, D2, D3 and D4, node between node, diode D3 and D4 between its diode D1 and D2 is electrically connected with the output of high-pressure side reactive power compensation circuit respectively, node between node, D1 and D4 between diode D2 and D3 accesses respectively the input of filter circuit, described filter circuit comprises capacitor C 1 and C2, described capacitor C 1 is in parallel with C2, its output output dc voltage Uab;
Described constant load translation circuit comprises voltage stabilizing didoe Dw, the variable resistor R of actual loading equivalence
l, diode D1, resistance R 1 and R2; Described voltage stabilizing didoe Dw, resistance R 2, diode D1 and resistance R 1 serial connection form a loop, and described direct voltage Uab is connected to the two ends of voltage stabilizing didoe Dw, the two ends of the variable resistor RL of actual loading equivalence the diode D1 after serial connection and resistance R 1.
The beneficial effects of the utility model:
1, a kind of power supply for high pressure on-line measuring device of the present utility model, convert and frequency division through AC-DC-AC by low-pressure side AC power, high-pass filtering, low-pass filtering, push away the single-frequency high-frequency electric power of exempting to obtain after amplification is processed and send into electric energy transmission coil, electric energy sends coil, by electromagnetic coupling device, electric energy is sent to electric energy receiving coil, it is the power supply of high pressure on-line measuring device that electric energy receiving coil delivers to by the AC energy receiving that ac-dc conversion circuit is transformed to after direct current, by utilizing magnetic resonance coupled modes, resonant cavity using insulation magnetic material as magnetic resonance, can ensure between high-pressure side and low-pressure side under the condition that there is no direct electrical communication, realize electric energy from low-pressure side on high-tension side reliable transmission, with prior art by compared with the method for the relay transmission coil transmitting energy of multilevel hierarchy, the present utility model has simple in structure, reliability and durability, the feature that efficiency of transmission is high.
2, the low-pressure side of a kind of power supply for high pressure on-line measuring device of the present utility model adopts small-power high frequency electric source, make low-pressure side produce precise frequency by crystal oscillator, obtain power by filter circuit and power amplification circuit more single, without the transmission work rate of clutter.
3, the low-pressure side of a kind of power supply for high pressure on-line measuring device of the present utility model adopts small-power high frequency electric source, and high-pressure side adopts constant load translation circuit, can reduce the impact of the fluctuation of load on contactless power transmission efficiency.
Brief description of the drawings
Utilize accompanying drawing to be described further utility model, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is functional-block diagram of the present utility model.
Fig. 2 is the series circuit figure of low-pressure side reactive power compensation circuit of the present utility model.
Fig. 3 is the parallel circuits figure of low-pressure side reactive power compensation circuit of the present utility model.
Fig. 4 is the schematic diagram that electric energy of the present utility model sends coil, electromagnetic coupling device and electric energy receiving coil.
Fig. 5 is the circuit diagram of high-pressure side of the present utility model reactive power compensation circuit and rectification filtering voltage stabilizing circuit.。
Fig. 6 is the circuit diagram of constant load translation circuit of the present utility model.
Reference numeral comprises:
1---electric energy transtation mission circuit, 11---high frequency electric source;
2---electric energy transfer circuit, 21---low-pressure side reactive power compensation circuit, 22---electric energy transmission coil, 23---electromagnetic coupling device, 24---electric energy receiving coil, 25---high-pressure side reactive power compensation circuits;
3---ac-dc conversion circuit, 31---rectification filtering voltage stabilizing circuit, 32---constant load translation circuits.
Embodiment
With the following Examples the utility model is further described.
A kind of power supply for high pressure on-line measuring device of the present embodiment, as shown in Figure 1, it comprises electric energy transtation mission circuit, electric energy transfer circuit 2 and electric energy receiving circuit 3, described electric energy transtation mission circuit comprises low-pressure side AC power and high frequency electric source 11, described electric energy transfer circuit 2 comprises that electric energy sends coil 22, electromagnetic coupling device 23 and electric energy receiving coil 24, described electromagnetic coupling device 23 comprises magnetic core and insulating rod, described insulating rod is the insulating rod of being made up of the insulation magnetic material with permeability, described electric energy transmission coil 22 is wound in one end of described magnetic core, described electric energy receiving coil 24 is wound in the other end of described magnetic core, described insulating rod is coated described magnetic core, described insulating rod sends between coil 22 and electric energy receiving coil 24 at described electric energy, described electric energy receiving circuit 3 comprises ac-dc conversion circuit.
Described low-pressure side AC power is through AC-DC-AC conversion and high frequency electric source 11 successively frequency division, high-pass filtering, low-pass filtering and push away and exempt to amplify the high-frequency electric power that reprocessing obtains single-frequency and send into electric energy transmission coil 22, electric energy sends coil 22, by electromagnetic coupling device 23, electric energy is sent to electric energy receiving coil 24, and electric energy receiving coil 24 is delivered to electric energy receiving circuit 3 by the AC energy receiving and is transformed to after direct current as high pressure on-line measuring device is powered.
Described electric energy sends coil 22 and electric energy receiving coil 24 is all set to enamelled wire, and described magnetic core is set to the ferromagnetic core of high permeability.
Electric energy send coil 22 be by close enamelled wire on the ferromagnetic core of high permeability, excitatory by the high frequency electric source 11 of low-pressure side, the ferromagnetic core that utilizes high permeability to obtain large as far as possible magnetic flux density under same exciting curent; The electromagnetic coupling device of being made up of insulation core material again utilizes the refraction theorem that propagate in different medium in magnetic field to make this high frequency magnetic field to greatest extent in insulation core material internal transmission, and make the magnetic field energy sending farthest be sent to high pressure reception lateral coil place by magnetic resonance principle, and ensure good insulation effect; The effect that electric energy sends coil 22 is to produce large as far as possible magnetic field energy; Finally by electric energy receiving coil 24 receive low-pressure side produce high frequency magnetic field, according to electromagnetic induction theorem at high-pressure side induced electromotive force, and by subsequent conditioning circuit process after obtain galvanic current press output.
Wherein, described high frequency electric source 11 is small-power high-frequency power supply circuit, it comprises frequency signal generating circuit, high-pass filtering circuit, the low-pass filter circuit connecting successively and pushes away exempts from amplifying circuit, obtains the ac square wave signal of needed any specific frequency by frequency signal generating circuit; The bandwidth-limited circuit consisting of high-pass filtering circuit and low-pass filter circuit obtains the higher sinusoidal signal of frequency unicity; The effect of push-pull amplifier circuit is to adopt the push-pull amplification system of the class AB operating state that approaches Class B operating state that the single-frequency sinusoidal voltage obtaining after filter circuit is carried out to power amplification, becomes the high frequency electric source of relatively high power 11 can be provided.
Wherein, described electric energy transfer circuit 22 also comprises low-pressure side reactive power compensation circuit 21, and described low-pressure side reactive power compensation circuit is connected to described high frequency electric source 11 and described electric energy sends between coil 22.
Concrete, as shown in Figure 2, described low-pressure side reactive power compensation circuit 21 is series compensation circuit, described series compensation circuit comprises resistance R p and Rr, reactive compensation capacitor Cp, inductance L p and Lr, one end of described resistance R p is connected with the output of high frequency electric source 11, its other end and capacitor C p, inductance L p, Lr is electrically connected successively with resistance R r, the other end of resistance R r is output, send coil 22 output signals to electric energy, under condition of resonance, work, while adopting series compensation, the induction reactance pressure drop of the voltage drop on series compensation capacitance and power transmitter side electromagnetic coupling device 23 offsets, can reduce the voltage request to low-pressure side electric power system.
Certainly, described low-pressure side reactive power compensation circuit 21 can be also shunt peaking circuit, and as shown in Figure 3, described shunt peaking circuit comprises resistance R p and Rr, reactive compensation capacitor Cp, inductance L p and Lr; Described resistance R p is electrically connected successively and forms a branch road with inductance L p, Lr and resistance R r, reactive compensation capacitor Cp is connected in parallel on these branch road two ends and forms described low-pressure side reactive power compensation circuit 21, one end of described reactive compensation capacitor Cp is connected with the output of high frequency electric source 11, the other end of described reactive compensation capacitor Cp sends coil 22 output signals to electric energy, when shunt compensation, flow through Shunt compensation capacitor current compensation the idle component of electric current in power transmitter side electromagnetic coupling device 23, thereby can reduce the current requirements to electric power system.
The frequency unicity power signal strong, that stability is high of being exported by the transformer of push-pull amplifier circuit enters low pressure (input) side reactive power compensation circuit.As shown in Figures 2 and 3, low-pressure side reactive power compensation circuit 21 can have two kinds of forms of Series FPB and parallel FPB, its equivalent electric circuit respectively as described in Fig. 2 and Fig. 3, C in figure
pfor reactive compensation capacitor, R
p, L
pthe resistance and the inductance that represent low pressure (power emission) side coupling coil, Rr, Lr represent equivalent resistance and the equivalent inductance of high pressure (power reception) side coupling coil.The compensation way that the design adopts is the resonance working method of full remuneration, and the size of building-out capacitor is by formula:
calculate and obtain.
For reaching the object of magnetic resonance coupling, raising efficiency of transmission, according to the principle of magnetic resonance coupling, must there is self-resonance at signal source frequency point in electric energy transmission coil 22 and electric energy receiving coil 24 for the transmission of resonance coupling energy, so that wire loop impedance reaches minimum value, thereby most of electromagnetic energy is transmitted by resonant path, realize the target of the efficiency of transmission of raising system.In view of this, must be by the Frequency Design of high frequency electric source 11 to meet the requirement of magnetic resonance at the natural resonance frequency of power signal receiver side circuit.
Therefore, as shown in Figure 4, electric energy receiving coil 24 receives from electric energy and sends after the power signal of coil 22, obtains high-pressure side DC supply through the high-pressure side reactive power compensation circuit 25 shown in Fig. 5, rectification filtering voltage stabilizing circuit 31 after processing.
Wherein, described ac-dc conversion circuit comprises rectification filtering voltage stabilizing circuit 31 and constant load translation circuit 32, the output of high-pressure side reactive power compensation circuit 25 described in the input termination of described rectification filtering voltage stabilizing circuit 31, the input of constant load translation circuit 32 described in the output termination of described rectification filtering voltage stabilizing circuit 31, the output of described constant load translation circuit 32 is described high pressure on-line measuring device power supply.
Wherein, as shown in Figure 5, described rectification filtering voltage stabilizing circuit 31 comprises rectification circuit and filter circuit, described rectification circuit is made up of the bridge circuit that comprises diode D1, D2, D3 and D4, node between node, diode D3 and D4 between its diode D1 and D2 is electrically connected with the output of high-pressure side reactive power compensation circuit 25 respectively, node between node, D1 and D4 between diode D2 and D3 accesses respectively the input of filter circuit, described filter circuit comprises capacitor C 1 and C2, described capacitor C 1 is in parallel with C2, its output output dc voltage Uab.
Wherein, electric energy transfer circuit 2 also comprises high-pressure side reactive power compensation circuit 25, and described high-pressure side reactive power compensation circuit 25 is connected between described electric energy receiving coil 24 and described electric energy receiving circuit 3.
Wherein, as shown in Figure 5, described high-pressure side reactive power compensation circuit 25 adopts shunt compensation resonant circuit, and object is to reduce the impact of frequency fluctuation on efficiency of transmission.It is by resistance R
s, inductance L
s, impedance Z
p, building-out capacitor C
scomposition, described resistance R
s, inductance L
swith impedance Z
pelectrical connection forms a branch road, building-out capacitor C successively
sbe connected in parallel on formation high-pressure side, branch road two ends reactive power compensation circuit 25; One end of described high-pressure side reactive power compensation circuit 25 is connected with electric energy receiving coil 24, and the other end is electrically connected with ac-dc conversion circuit 3, R in Fig. 5
s, L
sfor resistance and the inductance of high pressure (power reception) side coupling coil, C
sfor high-pressure side building-out capacitor, Z
p=R
p+ jX
prepresent the equiva lent impedance of low pressure (power transmission) side coupling coil, V
sbe illustrated in the equivalent source of high-pressure side received power.
Wherein, the size of building-out capacitor is by formula:
calculative determination, R in formula
lfor capacitor C
sthe equivalent resistance of right side circuit.
Work characteristics of the present utility model is that power transtation mission circuit and receiving circuit are all optimum mode of operation near resonance working point.Load-side equivalent resistance R
lfluctuation will affect power and receive the efficiency of (reactive power compensation).Therefore, there is one as the constant load translation circuit 32 of Fig. 6 in load-side, while its objective is the output current variation of high pressure on-line measuring device (load) while making this power work, equivalent load at the outlet side of voltage stabilizing circuit is constant, resonance operating state with guaranteed output receiver side is not destroyed, thereby ensures higher efficiency of transmission.Described constant load translation circuit 32 comprises voltage stabilizing didoe Dw, variable resistor RL, diode D1, resistance R 1 and the R2 of actual loading equivalence; Described voltage stabilizing didoe Dw, resistance R 2, diode D1 and resistance R 1 serial connection form a loop, described direct voltage Uab is connected to the two ends of voltage stabilizing didoe Dw, the two ends of the variable resistor RL of actual loading equivalence the diode D1 after serial connection and resistance R 1, wherein, R
lfor load equivalent resistance.
In Fig. 6, voltage stabilizing didoe Dw and diode D1-resistance R 1 form respectively two shunt circuits.For ab port, when load equivalent resistance R
lwhile changing because of operating state variation, because its equivalent resistance is:
, by the selection of the resistance to voltage stabilizing didoe Dw voltage stabilizing value and resistance R 2, can design the change in resistance scope of the nonlinear resistance of determining Dw; Through the parameter of choose reasonable resistance R 1, can determine the nonlinear resistance change in resistance scope of diode D1.By optimal design, select the working point of suitable non-linear element, can make the equivalent resistance of ab port at load resistance R
lwhile variation, can substantially keep constant in certain scope, like this, make receiving circuit at alternating current circuit part groundwork near natural resonance frequency point.
The beneficial effects of the utility model:
1, a kind of power supply for high pressure on-line measuring device of the present utility model, by by low-pressure side AC power through high frequency electric source 11 successively frequency division, high-pass filtering, low-pass filtering is exempted to send into electric energy transmission coil 22 after amplification with pushing away, electric energy sends coil 22, by electromagnetic coupling device 23, electric energy is sent to electric energy receiving coil 24, it is the power supply of high pressure on-line measuring device that electric energy receiving coil 24 delivers to by the AC energy receiving that ac-dc conversion circuit 3 is transformed to after direct current, by utilizing contactless power delivery technology, can ensure not have between high-pressure side and low-pressure side the contact of direct electricity, by utilizing insulating rod that High-Voltage Insulation core material the makes resonant cavity as magnetic resonance, realize electric energy from low-pressure side on high-tension side reliable transmission, with prior art by compared with the method for the relay transmission coil transmitting energy of multilevel hierarchy, the present utility model has simple in structure, reliability and durability, the feature that efficiency of transmission is high.
2, the low-pressure side of a kind of power supply for high pressure on-line measuring device of the present utility model adopts small-power high frequency electric source 11, make low-pressure side produce precise frequency by crystal oscillator, obtain power by filter circuit and power amplification circuit more single, without the transmission frequency of clutter.
3, the low-pressure side of a kind of power supply for high pressure on-line measuring device of the present utility model adopts small-power high frequency electric source 11, and high-pressure side adopts constant load translation circuit 32, can reduce the impact of the fluctuation of load on contactless power transmission efficiency.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (10)
1. for a power supply for high pressure on-line measuring device, it is characterized in that: comprise electric energy transtation mission circuit, electric energy transfer circuit and electric energy receiving circuit;
Described electric energy transtation mission circuit comprises low-pressure side AC power and high frequency electric source, described electric energy transfer circuit comprises that electric energy sends coil, electromagnetic coupling device and electric energy receiving coil, described electromagnetic coupling device comprises magnetic core and insulating rod, described insulating rod is the insulating rod of being made up of the insulation magnetic material with permeability, described electric energy sends coil winding in one end of described magnetic core, described electric energy receiving coil is wound in the other end of described magnetic core, described insulating rod is coated described magnetic core, and described insulating rod sends between coil and electric energy receiving coil at described electric energy; Described electric energy receiving circuit comprises ac-dc conversion circuit;
Described low-pressure side AC power is through AC-DC-AC conversion and high frequency electric source successively frequency division, high-pass filtering, low-pass filtering and push away and exempt to amplify the high-frequency electric power that reprocessing obtains single-frequency and send into electric energy transmission coil, electric energy sends coil, by electromagnetic coupling device, electric energy is sent to electric energy receiving coil, and electric energy receiving coil is delivered to ac-dc conversion circuit by the AC energy receiving and is transformed to after direct current as high pressure on-line measuring device is powered.
2. a kind of power supply for high pressure on-line measuring device according to claim 1, is characterized in that: described electric energy sends coil and electric energy receiving coil is all set to enamelled wire, and described magnetic core is set to the ferromagnetic core of high permeability.
3. a kind of power supply for high pressure on-line measuring device according to claim 1, it is characterized in that: described high frequency electric source is small-power high-frequency power supply circuit, it comprises frequency signal generating circuit, high-pass filtering circuit, the low-pass filter circuit connecting successively and pushes away exempts from amplifying circuit.
4. a kind of power supply for high pressure on-line measuring device according to claim 1, it is characterized in that: described electric energy transfer circuit also comprises low-pressure side reactive power compensation circuit, described low-pressure side reactive power compensation circuit is connected to described high frequency electric source and described electric energy sends between coil.
5. a kind of power supply for high pressure on-line measuring device according to claim 4, it is characterized in that: described low-pressure side reactive power compensation circuit is series compensation circuit, described series compensation circuit comprises resistance R p and Rr, reactive compensation capacitor Cp, inductance L p and Lr, one end of described resistance R p is connected with the output of high frequency electric source, its other end is electrically connected with resistance R r successively with capacitor C p, inductance L p, Lr, the other end of resistance R r is output, sends coil output signal to electric energy.
6. a kind of power supply for high pressure on-line measuring device according to claim 4, it is characterized in that: described low-pressure side reactive power compensation circuit is shunt peaking circuit, described shunt peaking circuit comprises resistance R p and Rr, reactive compensation capacitor Cp, inductance L p and Lr; Described resistance R p is electrically connected successively and forms a branch road with inductance L p, Lr and resistance R r, reactive compensation capacitor Cp is connected in parallel on these branch road two ends and forms described low-pressure side reactive power compensation circuit, one end of described reactive compensation capacitor Cp is connected with the output of high frequency electric source, and the other end of described reactive compensation capacitor Cp sends coil output signal to electric energy.
7. a kind of power supply for high pressure on-line measuring device according to claim 4, it is characterized in that: electric energy transfer circuit also comprises high-pressure side reactive power compensation circuit, described high-pressure side reactive power compensation circuit is connected between described electric energy receiving coil and described electric energy receiving circuit.
8. a kind of power supply for high pressure on-line measuring device according to claim 7, is characterized in that: described high-pressure side reactive power compensation circuit adopts shunt compensation resonant circuit, and it is by resistance R
s, inductance L
s, impedance Z
p, building-out capacitor C
scomposition, described resistance R
s, inductance L
swith impedance Z
pelectrical connection forms a branch road, building-out capacitor C successively
sbe connected in parallel on formation high-pressure side, branch road two ends reactive power compensation circuit; One end of described high-pressure side reactive power compensation circuit is connected with electric energy receiving coil, and the other end is electrically connected with ac-dc conversion circuit.
9. a kind of power supply for high pressure on-line measuring device according to claim 1, it is characterized in that: described ac-dc conversion circuit comprises rectification filtering voltage stabilizing circuit and constant load translation circuit, the output of high-pressure side reactive power compensation described in the input termination of described rectification filtering voltage stabilizing circuit, the input of constant load translation circuit described in the output termination of described rectification filtering voltage stabilizing circuit, the output of described constant load translation circuit is described high pressure on-line measuring device power supply.
10. a kind of power supply for high pressure on-line measuring device according to claim 9, it is characterized in that: described rectification filtering voltage stabilizing circuit comprises rectification circuit and filter circuit, described rectification circuit is by comprising diode D1, D2, the bridge circuit of D3 and D4 forms, node between its diode D1 and D2, node between diode D3 and D4 is electrically connected with the output of high-pressure side reactive power compensation circuit respectively, node between diode D2 and D3, node between D1 and D4 accesses respectively the input of filter circuit, described filter circuit comprises capacitor C 1 and C2, described capacitor C 1 is in parallel with C2, its output output dc voltage Uab,
Described constant load translation circuit comprises voltage stabilizing didoe Dw, variable resistor RL, diode D1, resistance R 1 and the R2 of actual loading equivalence; Described voltage stabilizing didoe Dw, resistance R 2, diode D1 and resistance R 1 serial connection form a loop, and described direct voltage Uab is connected to the two ends of voltage stabilizing didoe Dw, the two ends of the variable resistor RL of actual loading equivalence the diode D1 after serial connection and resistance R 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196035.2U CN203774884U (en) | 2014-04-22 | 2014-04-22 | Power supply for high-voltage on-line detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196035.2U CN203774884U (en) | 2014-04-22 | 2014-04-22 | Power supply for high-voltage on-line detection device |
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| Publication Number | Publication Date |
|---|---|
| CN203774884U true CN203774884U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420196035.2U Expired - Lifetime CN203774884U (en) | 2014-04-22 | 2014-04-22 | Power supply for high-voltage on-line detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993603A (en) * | 2015-05-15 | 2015-10-21 | 深圳市普林泰克科技有限公司 | High-voltage-isolating power supply device and method based on magnetic field isolation |
| CN108258780A (en) * | 2016-12-27 | 2018-07-06 | 中国电力科学研究院 | A kind of ultra-high-tension power transmission line electrical equipment wireless power supply system |
| CN108631450A (en) * | 2018-03-26 | 2018-10-09 | 王朋 | A kind of high efficiency radio energy transmission system based on resonance insulator chain new construction |
| CN112886718A (en) * | 2021-01-16 | 2021-06-01 | 国网福建省电力有限公司三明供电公司 | Resonance compensation type current transformer induction power taking system |
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2014
- 2014-04-22 CN CN201420196035.2U patent/CN203774884U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993603A (en) * | 2015-05-15 | 2015-10-21 | 深圳市普林泰克科技有限公司 | High-voltage-isolating power supply device and method based on magnetic field isolation |
| CN104993603B (en) * | 2015-05-15 | 2018-10-16 | 深圳市普林泰克科技有限公司 | It is a kind of based on magnetic field isolation high pressure obstruct for electric installation and its method of supplying power to |
| CN108258780A (en) * | 2016-12-27 | 2018-07-06 | 中国电力科学研究院 | A kind of ultra-high-tension power transmission line electrical equipment wireless power supply system |
| CN108631450A (en) * | 2018-03-26 | 2018-10-09 | 王朋 | A kind of high efficiency radio energy transmission system based on resonance insulator chain new construction |
| CN112886718A (en) * | 2021-01-16 | 2021-06-01 | 国网福建省电力有限公司三明供电公司 | Resonance compensation type current transformer induction power taking system |
| CN112886718B (en) * | 2021-01-16 | 2022-10-14 | 国网福建省电力有限公司三明供电公司 | Resonance compensation type current transformer induction power taking system |
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