CN102590586A - Photoelectric current transformer for supplying power for transmission line insulator - Google Patents
Photoelectric current transformer for supplying power for transmission line insulator Download PDFInfo
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- CN102590586A CN102590586A CN2012100410098A CN201210041009A CN102590586A CN 102590586 A CN102590586 A CN 102590586A CN 2012100410098 A CN2012100410098 A CN 2012100410098A CN 201210041009 A CN201210041009 A CN 201210041009A CN 102590586 A CN102590586 A CN 102590586A
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Abstract
The invention discloses a photoelectric current transformer for supplying power for a transmission line insulator. The photoelectric current transformer comprises a current photoelectric measuring system; a high-voltage current photoelectric data measuring and transmitting module makes use of an electromagnetic induction principle to measure the current of a current busbar at a low-voltage side and converts the current information into a photoelectric signal, and the current information is transmitted to a current measurement secondary processing module arranged at the low-voltage side to perform data processing. The photoelectric current transformer is characterized in that an active photoelectric current transformer further comprises a high frequency drive power supply arranged at the low-voltage side, a high frequency transmission line insulator core and an alternating current (AC)/direct current (DC) power supply converter arranged at the high-frequency side; the high frequency transmission insulator core transmits high frequency AC electric energy with a specific frequency produced by the high frequency driving power supply from the low-voltage side to the high-voltage side through the liquid crystal (LC) high frequency electromagnetic resonance, and the high frequency AC electric energy is converted into DC electric energy by the AC/DC power supply converter, thereby supplying power for the high-voltage current measurement data photoelectric transmission module in the current photoelectric measuring system.
Description
Technical field
The present invention relates to a kind of active photoelectric current inductor.
Background technology
Current transformer plays crucial effect in electric system, be a nucleus equipment in the electric system.Along with power system development and intelligent grid construction; The particularly development of EHV transmission; Electric system to current transformer require increasingly high; Traditional electromagnetic current transducer can't satisfy the power system development requirement owing to there is ferromagnetic saturated, shortcoming that frequency response is low, High-Voltage Insulation ability, interruption of service are many etc. can't overcome.Good, the wide frequency range of exploitation linear properties, the current transformer that the High-Voltage Insulation ability is strong have been pressing for of intelligent grid development.Optical fiber current mutual inductor OCT because of anti-electromagnetic interference performance is good, measuring accuracy is high, dynamic range is big, frequency response range is wide, little in light weight, the low price of volume, with advantages such as the interface of digital device is convenient; Be with a wide range of applications, become the trend of high-tension current inductor gradually.Optical fiber current mutual inductor mainly contains pure optical current mutual inductor (passive photo-electricity mutual-inductor) and two kinds of forms of photoelectric mixed-mode current transformer (active photo-electricity mutual-inductor); Pure optical current mutual inductor is owing to receive the influence of factors such as environment temperature and vibrations, and the stability of its performance is the main difficulty of its practicability of puzzlement; The photoelectric mixed-mode current transformer utilize the low-power current transformer or (Rogowski) the electromagnetic measurement principle of coil measure electric current; Utilize the fiber-optic communications traffic metrical information; Overcome the difficult problem of the poor stability of passive photo-electricity mutual-inductor; Good stable property makes it obtain fast development, has got into the practicability stage at present.But the on high-tension side measurement of active photo-electricity mutual-inductor, data processing and optoelectronic information transmission system etc. need power supply, power supply to mainly contain " power supply of high-pressure side primary current electromagnetic induction ", " laser energy supply ", " ultrasound wave energy supply " and power supply modes such as " pneumatic energy supplies " at present." power supply of high-pressure side primary current electromagnetic induction " exists the power supply can be not enough when primary current is smaller, and the power supply dead band that formation can't be worked exists the energy of supplying power excessive when primary current is very big again during with short circuit, is difficult to release and damages the difficult problem of feed circuit; Though laser, the stable performance of ultrasound wave energy supply; Be well positioned to meet the stability requirement of power supply, but the power supply energy is smaller, very high to the energy-conservation and anti-interference requirement of measurement and photo transmission system; And too expensive, the long-time running life-span can not meet the demands; Pneumatic energy supply also exists gas to reveal easily and the long-time running life-span can not meet the demands.The high-pressure side energy supply of photoelectric mixed-mode current transformer is the core technology difficult problem of its practicability of puzzlement.
Summary of the invention
To the existing existing deficiency of active photoelectric current inductor high-voltage side energy supply mode; The invention provides a kind of active photoelectric current inductor of transmission line insulator power supply, can pass the on high-tension side electricity consumption module energy supply that to realize active photoelectric current inductor or the online detection watch-dog of other high pressure through high-frequency electromagnetic resonance.
For reaching above purpose, the present invention takes following technical scheme to be achieved:
A kind of photoelectric current inductor of transmission line insulator power supply; Comprise an electric current photoeletric measuring system that constitutes by high-voltage current measurement photooptical data transport module, telecommunication optical fiber and current measurement data secondary treating module; High-voltage current measurement photooptical data transport module utilizes electromagnetic induction principle to measure the electric current of high voltage side current bus; And convert current information to photosignal, carry out data processing to the current measurement secondary treating module that current information sends low-pressure side to through telecommunication optical fiber; It is characterized in that; Said active photoelectric current inductor comprises that also a high-frequency drive power supply that places low-pressure side, high frequency transmission line insulator core, one place on high-tension side AC/DC supply convertor; This high frequency transmission line insulator core is sent to the high-pressure side to the high-frequency ac electric energy of the CF of high-frequency drive power supply generation from low-pressure side through LC high-frequency electromagnetic resonance wherein, converts the high-voltage current measurement data light electrical transmission module power supply of direct current energy in the electric current photoeletric measuring system into by the AC/DC supply convertor again.
In the such scheme; Described high frequency transmission line insulator core comprises two capacitor column; Each capacitor column constitutes by the plane-parallel capacitor series connection of identical physical dimension and electric capacity size is one on top of another; The pitch place of equal height is connected with several inductance L between two capacitor column, and the output of said high-frequency drive power supply connects two electrodes of two capacitor column low pressure ends, and two electrodes of two capacitor column high-pressure sides connect the input of AC/DC supply convertors 4.
Two capacitor column can be installed side by side, also can one of them be made right cylinder, and another makes cylindrical drum, carry out the concentric axis suit then.
Described high-frequency drive power supply comprises an AC-DC translation circuit, a signal generator, a frequency of phase locking tracker, a power amplifier and one first transformer, and the output of AC-DC translation circuit connects signal generator, frequency of phase locking tracker and power amplifier; The high-frequency signal of signal generator output connects power amplifier, and the output of power amplifier connects the input of first transformer, and two electrodes of two capacitor column low pressure ends in the output of first transformer and the high frequency transmission line insulator core are connected.
Described AC/DC supply convertor comprises second transformer that is connected with two electrodes of two capacitor column high-pressure sides; The output of this second transformer connects the input of a high-frequency rectification circuit; The output of high-frequency rectification circuit connects the input of a filtering circuit; The output of filtering circuit is carried out the stable dc power supply of voltage stabilizing conversion output through a DC-DC converter, supplies power to high-voltage current measurement data light electrical transmission module.
The photoelectric current inductor of transmission line insulator power supply of the present invention; Utilize high-frequency electrical energy to be sent to the high-pressure side to the power supply energy through high frequency transmission line insulator core from low-pressure side; Convert high-frequency electrical energy to direct current energy again in the high-pressure side, realize high-pressure side power unit energy supply active photoelectric current inductor.It so between the high voltage of electric power system and the low-voltage both sides complete power frequency electrical isolation; The High-Voltage Insulation ability of this electric power system is strong; The power supply energy of transmission is big, and stable performance does not receive such environmental effects and restriction; Long service life, and the electromagnetic interference effect that on high-tension side measurement and data handling system etc. are produced is little.
The present invention compared with prior art has the following advantages:
1) do not receive the big or small restriction of the bus current in high-pressure side, do not have " power supply dead band " and not influenced by heavy current impact, the power supply energy is very stable.
2) bigger power supply energy can be provided, and can long-term continuously reliable power supply, very low to the energy-conservation and anti-interference requirement of the measuring system of active photo-electricity mutual-inductor and photo transmission system.
3) performance is very stable, and adaptive capacity to environment does not receive the restriction of factors such as temperature variation by force, and long service life can satisfy the requirement of electric system to security, reliability and long service life.
Description of drawings
Fig. 1 is the photoelectric current inductor structural representation of transmission line insulator power supply of the present invention.
Fig. 2 is the functional block diagram of the high-frequency drive power supply 3 of Fig. 1 mesolow side.
Fig. 3 is the functional block diagram of the AC-DC supply convertor 4 of Fig. 1 mesohigh side.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
With reference to figure 1; The power frequency AC of 50HZ is converted to high-frequency drive power supply 3 at low-pressure side L and to drive the needed high frequency electric source of high frequency transmission line insulator core; The high frequency output that the high-frequency drive power supply produces connects two capacitor column 1 and two electrodes of 2 low pressure end (lower surface) in the high frequency transmission line insulator core, and high-frequency drive power supply 3 drives high frequency transmission line insulator cores and produces the high-frequency electromagnetic energy that will transmit.High frequency transmission line insulator core comprises two series capacitor posts 1 and 2 and be connected two inductance L between the capacitor column; Capacitor column 1 and 2 one on top of another the forming of plane-parallel capacitor series connection by several same physical dimension and electric capacity size; Two capacitor column 1 and 2 can be installed side by side; Also can make right cylinder to capacitor column 1, make cylindrical drum to capacitor column 2, carry out the concentric axis suit to them again; Plane-parallel capacitor can adopt high voltage ceramic capacitor; Connect one-tenth capacitor column 1 one on top of another and as far as possible reduced the mutual gap between the capacitor at 2 o'clock of the electrode of plane-parallel capacitor keeps the height at the corresponding capacitor place between two capacitor column 1 and 2 identical parallel with electrode, two capacitor column 1 and 2 etc. connect inductance L between the electrode of capacitor at pitch height place; Pitch height and inductance number and inductance value size are confirmed by the frequency of high-frequency drive power supply 3; Two capacitor column 1 and 2 series capacitor are formed high frequency transmission line insulator core with these inductance L, and this insulator core has alternating current-direct current High-Voltage Insulation ability, can be transferred to high-pressure side H to the high-frequency electrical energy of CF (10KHZ-1MHZ) from low-pressure side L.The input of AC/DC supply convertor 4 connects two capacitor column 1 and two electrodes of 2 high-pressure side (upper surface) in the high frequency transmission line insulator core; Convert the high-frequency electrical energy of high frequency transmission line insulator core high-pressure side output high-voltage current measurement photooptical data transport module 6 power supplies of direct current energy in the electric current photoeletric measuring system of photoelectric current inductor into, realize the photoelectric measurement of high-tension current.
The electric current photoeletric measuring system comprises high-voltage current measurement photooptical data transport module 6, telecommunication optical fiber 7 and current measurement secondary treating module 8.High-voltage current measurement photooptical data transport module utilizes electromagnetic induction principle to measure the high-tension current in the high-tension current bus 5; And convert current information to photosignal; Send current information the current measurement secondary treating module 8 of low-pressure side L to through telecommunication optical fiber 7, carry out data processing and realize measurement high-tension current.
As shown in Figure 2, the high-frequency drive power supply 3 of low-pressure side comprises an AC-DC translation circuit, a signal generator, a frequency of phase locking tracker, a power amplifier and a transformer.The 50HZ power frequency AC is transformed into DC voltage through the AC-DC translation circuit, and the output of AC-DC translation circuit connects the dc bias circuit of signal generator, frequency of phase locking tracker and power amplifier, for they provide dc offset voltage; The high-frequency signal of signal generator output connects power amplifier, carries out power amplification and produces high frequency power voltage, and the frequency of high-frequency signal is identical with LC EMR electromagnetic resonance frequency in the high frequency transmission line insulator core; The output of power amplifier connects the input of transformer; Two electrodes of two capacitor column 1 in the output of transformer and the high frequency transmission line insulator core and 2 low pressure end are connected, and realize the impedance matching of the EMR electromagnetic resonance frequency of high-frequency drive power supply 3 and high frequency transmission line insulator core through transformer; The phase-locked loop frequency tracker is gathered the output voltage and the electric current of transformer; Supply with trivial phase frequency tracking circuit and judge the LC EMR electromagnetic resonance change of frequency in the high frequency transmission line insulator core; Dynamic LC EMR electromagnetic resonance frequency of following the tracks of in the high frequency transmission line insulator core; And the output frequency of adjustment signal generator, realize frequency dynamic tracking resonant coupling.
As shown in Figure 3; Described AC/DC supply convertor 4 comprises transformer, high-frequency rectification, filtering circuit and DC-DC converter that is connected with two electrodes of two capacitor column 1 and 2 high-pressure side; The output of this transformer connects high-frequency rectification circuit; High-frequency rectification circuit connects filtering circuit; The output of filtering circuit is carried out the stable dc power supply (0-12V) of voltage stabilizing conversion output through the DC-DC converter, to high-voltage current measurement photooptical data transport module 6 power supplies of the electric current photoeletric measuring system mesohigh side of photoelectric current inductor.
Claims (6)
1. the photoelectric current inductor of transmission line insulator power supply; Comprise an electric current photoeletric measuring system that constitutes by high-voltage current measurement photooptical data transport module, telecommunication optical fiber and current measurement data secondary treating module; High-voltage current measurement photooptical data transport module utilizes electromagnetic induction principle to measure the electric current of high voltage side current bus; And convert current information to photosignal, carry out data processing to the current measurement secondary treating module that current information sends low-pressure side to through telecommunication optical fiber; It is characterized in that; Said active photoelectric current inductor comprises that also a high-frequency drive power supply that places low-pressure side, high frequency transmission line insulator core, one place on high-tension side AC/DC supply convertor; This high frequency transmission line insulator core is sent to the high-pressure side to the high-frequency ac electric energy of the CF of high-frequency drive power supply generation from low-pressure side through LC high-frequency electromagnetic resonance wherein, converts the high-voltage current measurement data light electrical transmission module power supply of direct current energy in the electric current photoeletric measuring system into by the AC/DC supply convertor again.
2. the photoelectric current inductor of transmission line insulator power supply as claimed in claim 1; It is characterized in that; Described high frequency transmission line insulator core comprises two capacitor column; Each capacitor column constitutes by the plane-parallel capacitor series connection of identical physical dimension and electric capacity size is one on top of another; The pitch place of equal height is connected with several inductance L between two capacitor column, and the output of said high-frequency drive power supply connects two electrodes of two capacitor column low pressure ends, and two electrodes of two capacitor column high-pressure sides connect the input of AC/DC supply convertors.
3. the photoelectric current inductor of transmission line insulator power supply as claimed in claim 2 is characterized in that said two capacitor column are installed side by side.
4. the photoelectric current inductor of transmission line insulator power supply as claimed in claim 2 is characterized in that one of them makes right cylinder said two capacitor column, and another makes cylindrical drum, carries out the concentric axis suit then.
5. the photoelectric current inductor of transmission line insulator power supply as claimed in claim 2; It is characterized in that; Described high-frequency drive power supply comprises an AC-DC translation circuit, a signal generator, a frequency of phase locking tracker, a power amplifier and one first transformer, and the output of AC-DC translation circuit connects signal generator, frequency of phase locking tracker and power amplifier; The high-frequency signal of signal generator output connects power amplifier, and the output of power amplifier connects the input of first transformer, and two electrodes of two capacitor column low pressure ends in the output of first transformer and the high frequency transmission line insulator core are connected.
6. the photoelectric current inductor of transmission line insulator power supply as claimed in claim 2; It is characterized in that; Described AC/DC supply convertor comprises second transformer that is connected with two electrodes of two capacitor column high-pressure sides; The output of this second transformer connects the input of a high-frequency rectification circuit; The output of high-frequency rectification circuit connects the input of a filtering circuit, and the output of filtering circuit is carried out the stable dc power supply of voltage stabilizing conversion output through a DC-DC converter, supplies power to high-voltage current measurement data light electrical transmission module.
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CN116780668A (en) * | 2022-01-10 | 2023-09-19 | 何小平 | Integrated high-voltage equipment and high-frequency energy-transfer power supply device and integrated method |
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Patent Citations (6)
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CN1864763A (en) * | 2006-03-31 | 2006-11-22 | 西安交通大学 | A remote detection device for implanted heart pacemaker and bidirectional data transmission method |
CN101849342A (en) * | 2007-09-17 | 2010-09-29 | 高通股份有限公司 | High efficiency and power transfer in wireless power magnetic resonators |
CN101227105A (en) * | 2007-11-26 | 2008-07-23 | 清华大学 | Inductance coupling interval power supply device |
CN101364474A (en) * | 2008-06-06 | 2009-02-11 | 西安交通大学 | Air-actuated energizing apparatus for current mutual inductor |
CN101309057A (en) * | 2008-06-19 | 2008-11-19 | 西安交通大学 | Ultrasonic energy supply apparatus of photoelectric current inductor |
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