CN105301323B - The method that UHVDC Arrester Leakage Current is detected online using cloud - Google Patents

Abstract

The method detected online to UHVDC Arrester Leakage Current using cloud is respectively completed following steps using a detecting system：A, judge whether to carry out signal acquisition to electric current；B, signal acquisition is carried out to electric current；C, the output of electric current Value Data is formed after being handled the signal of acquisition；D, the current data of acquisition is summarized by being wirelessly transmitted in central monitoring device；E, central monitoring device shows that current data distribution is sent to the mobile terminal of corresponding arrester manager by the current data simultaneously.The present invention can carry out online acquisition to the faint circuit signal of the microampere order of magnitude, and depend on cloud, the variation of leakage current in direct current arrester, harmonic wave and electrostatic can be monitored at any time by central monitoring device, effectively prevent to cause damage and the injures and deaths of building and people and animals, and is conducive to extend the service life of arrester.

Description

The method that UHVDC Arrester Leakage Current is detected online using cloud

Technical field

The present invention relates to UHVDC Transmission Lines arrester state inspection, refer in particular to be related to using cloud to spy The method that high voltage direct current arrester Leakage Current is detected online.

Background technology

With China's rapid economic development, electricity needs increases rapidly, and there are in electric power resource distribution and load in China The unmatched natural characteristic in heart district domain needs to improve imbalance between power supply and demand problem by remote, large capacity transmission circuit, " west Send in electric east ", the engineerings such as " north and south supply mutually " be major deployments scheme at this stage, extra-high voltage direct-current transmission technology is specific to implement skill Art means.

Alternating current is transformed into direct current by direct current transportation by transverter, is then sent to by electricity by DC power transmission line It holds and alternating current is become by transverter, finally inject AC network.The voltage class concept of extra-high voltage direct-current transmission with exchange It transmits electricity different.For ac transmission, 220kV and voltage class below are generally known as high pressure, 330~750kV's Referred to as super-pressure, 1000kV's or more is known as extra-high voltage.Direct current transportation is then slightly different, and ± 100kV's or more is referred to as height Pressure；± 500kV and ± 600kV are still referred to as high pressure, are not known as super-pressure generally；And be more than ± 600kV then be known as extra-high voltage.

± 800kV extra-high voltage direct-current transmissions can have a large amount of big load centers of electric power direct sending since centre is without drop point Transmission capacity is big, power transmission distance is remote, saves the advantages that transmission of electricity stringing corridor, the technologies such as relevant device research and development, control and operation and Demonstration project is rapidly developed and extensive use in recent years, and China has been made to be in the world in UHV transmission technical field Leading position leads technological development direction and key equipment Development Trend.

The construction of extra-high voltage DC transmission system be unable to do without overvoltage protection, and direct current arrester is extra-high voltage direct-current The key equipment of transmission system overvoltage protection determines the dielectric level of whole system, influences equipment volume, project occupation of land Area and cost.It is most important for the Insulation Coordination of optimization system and reduction project cost to improve protection of arrester level.The palm Direct current arrester real-time running state and protection feature are held to reinforcing the operational management, perfect of direct-current ultra high voltage transmission system equipment Its live detection technology and repair based on condition of component level have a very important significance.

For now, the service condition of direct current arrester is much harsher than alternating-current lightning arrestor, to direct current arrester The technology that runnability proposes requires very high.Direct current arrester structure, operating condition, action principle, protection feature etc. with friendship It is different to flow arrester.In order to find the making moist of direct current arrester, aging and other hidden danger in time, avoid huge caused by accident Economic loss carries out ultra-high voltage lightning arrester while improving ultra-high voltage lightning arrester product reliability, strengthening quality control It monitors on-line significant and is in urgent need.A kind of UHVDC Arrester Leakage Current that is directed to especially is needed in a hurry Detection device and detection method.

Chinese utility model patent（CN202693723U）A kind of leakage current of an arrester alarm system is disclosed, including is kept away Thunder device and counter, arrester are connected with the first current transformer and the second current transformer for switching current, the first electricity Current transformer is connected with reference voltage circuit, and reference voltage is added on first voltage conversion circuit, the second electricity by reference voltage circuit Current transformer is connected with first voltage conversion circuit, and first voltage conversion circuit is powered for the first warning device, and first voltage turns It changes circuit and is connected with the progress secondary voltage conversion of second voltage conversion circuit, second voltage conversion circuit is that the second warning device supplies Electricity.Although the above Leakage Current alarm system principle is simple, alarm effect is apparent, however in the actual use process also It has the following disadvantages：1, the above Leakage Current alarm system is mainly in transmission line of alternation current, since arrester exists Service condition in extra high voltage direct current transmission line is much harsher than alternating-current lightning arrestor, especially in the self-insurance of Lightning Over-voltage Shield requirement may also be difficult to reach, thus the technology of Leakage Current alarm system requires to cannot be satisfied in extra-high voltage direct-current transmission line It is effectively and stably run in road；2, the above Leakage Current alarm system major function is to carry out qualitative operation, can not be right All the time the big decimal fractions of middle Leakage Current are detected.

Invention content

The present invention provides the method detected online to UHVDC Arrester Leakage Current using cloud, main mesh Be overcome existing Leakage Current alarm system that can not carry out stablizing to UHVDC Arrester Leakage Current and accurate inspection The defect of survey.

In order to solve the above technical problems, the present invention adopts the following technical scheme that：

The method detected online to UHVDC Arrester Leakage Current using cloud is distinguished using a detecting system Complete following steps：A, judge whether to carry out signal acquisition to electric current；B, signal acquisition is carried out to electric current；C, by the signal of acquisition The output of electric current Value Data is formed after being handled；D, by the current data of acquisition by be wirelessly transmitted in central monitoring device into Row summarizes；E, central monitoring device shows that current data distribution is sent to corresponding arrester manager by the current data simultaneously Mobile terminal, the detecting system include one be set near direct current arrester detection device, for by the detection device Data sending device, data sink, central monitoring device and the shifting that the Leakage Current testing result of acquisition is transmitted Dynamic terminal, the Enable Pin of the data sink are connected to the output end of the data sending device, the central monitoring dress The Enable Pin set is connected to the output end of the data sink, output end connection and the shifting of the central monitoring device The Enable Pin of dynamic terminal；The detection device includes data acquisition unit, data processing unit, protection circuit unit and power supply Unit, the data acquisition unit include current sensor, power amplifier and circuit acquisition module, the current sensor Including a toroidal shell, the magnetic core of a C-shaped arrangement and two Hall circuit modules, it is accommodating that one is provided in the toroidal shell Space, rotating around equipped with a first coil winding and a second coil winding on the magnetic core, and the magnetic core is installed on institute It states in accommodating space, the two Hall circuit modules are installed in the accommodating space and the both ends at its both ends and the magnetic core It is adjacent, an electric bridge is connected between the two Hall circuit modules, input terminal and the arrester of the first coil winding leak electricity Galvanic electricity connects, and the input terminal of the second coil winding is electrically connected with an output end of the power amplifier, and the power is put Another output end of big device is electrically connected with the circuit acquisition module, and the detection device further includes an acquisition protection module, institute The electric energy output end for stating power supply unit is divided into four tunnels, is electrically connected the electrical energy inputs in protection circuit unit, acquisition protection The electrical energy inputs of the electrical energy inputs of module, the electrical energy inputs of data acquisition unit and data processing unit, arrester The output end of electric current is divided into two-way, is connected to the Enable Pin of the data acquisition unit all the way, and another way is connected to the acquisition The Enable Pin of protection module, the output end of the acquisition protection module is connected to the Enable Pin of the protection circuit unit, described The Enable Pin of data processing unit is equipped with two-way, connects the output end of the data acquisition unit all the way, described in another way connection Protect the output end of circuit unit；After the step a is included in the extraction wire for connecting arrester electric current, mould is protected by acquisition Block and data acquisition unit carry out Preliminary detection to the electric current on lead, when arrester electric current is less than or equal to 1 milliampere hour, acquisition Protection module is failure to actuate, and data acquisition unit starts and carries out after signal acquisition and data processing electric current through by data processing Unit exports；When arrester electric current is more than 1 milliampere hour, data acquisition unit is motionless, and acquires protection module startup, the detection High-impedance state is presented to input in device, at this time without signal acquisition and data processing, and is exported via data processing unit.

Further, the step b include when arrester leakage current direct current signal after first coil winding The magnetic field generated in magnetic core is focused into the two Hall circuit modules, due to the two Hall circuit module position not Together, thus unequal Hall voltage is generated, the two Hall circuit modules are connected via circuit in parallel according to shunt capacitance After equivalent circuit synthesis, the output valve for the voltage signal that the two Hall circuit modules generate is two Hall circuit module output valves Arithmetic mean of instantaneous value, the output valve of the voltage signal acts on through power amplifier conducting so that being generated in second coil winding reversed Compensation electric current, the magnetic flux that compensation electric current generates is with flow direction caused by arrester leakage current on the contrary, when the two realizes magnetic After balance, core flux zero, in second coil winding compensation electric current using after the test of circuit acquisition module to get going out to keep away The direct current signal value of thunder device Leakage Current is hence into step c.

Further, each Hall circuit module include a Hall element and be in series with the Hall element one Resistance is adjusted, the control current terminal parallel connection of the Hall circuit module is accessed in DC constant flowing power an I+ and I-, and two institutes The output end data contacts that also parallel connection is VH+ and VH- of Hall circuit module are stated, the power amplifier includes one and the number According to operational amplifier, one first triode, one second triode and an input power that contact output end is electrically connected, described the The collector of one triode is electrically connected to the positive interface of the input power, and the collector of second triode is connected to described The output end of the negative interface of input power, the power amplifier is divided into two-way, is connected to the base of first triode all the way Pole, another way are connected to the base stage of second triode, and the amplifying stage of first triode is divided into two-way, is connected to all the way The input terminal of the second coil winding, another way are connected to the amplifying stage of second triode, the circuit acquisition module It is connected to the measurement resistance R1 of the second coil winding output end including one end and for measuring electric current in the measurement resistance The ammeter of numerical value, the other end ground connection for measuring resistance R1；The step b includes, when the direct current of arrester leakage current The magnetic field that signal generates after first coil winding in magnetic core is focused on two Hall elements, due to two Hall The position of circuit module is different, thus generates unequal Hall voltage, and the two Hall circuit modules connect via circuit in parallel After connecing the equivalent circuit synthesis according to shunt capacitance, the output valve of the voltage signal that the two Hall circuit modules generate is two suddenly The arithmetic mean of instantaneous value of your circuit module output valve, amplification of the output valve through operational amplifier of the voltage signal are completed pair The control of discharge of input power so that the positive interface of input power exports Contrary compensation electric current in second coil winding, compensation The magnetic flux that electric current generates is with flow direction caused by arrester leakage current on the contrary, by operational amplifier to Contrary compensation electricity The control of stream, it is always definite value to make the magnetic flux density in magnetic core, and it is electric using measuring to compensate electric current in second coil winding at this time Be input to ground after resistance R1, by ammeter to measuring the current values that circulate in resistance R1, and according to the current values into Row scale operation is the direct current signal value for obtaining arrester Leakage Current, hence into step c.

Further, inert-gas diode and TVS diode are added in the extraction wire of arrester electric current, it should TVS diode differential concatenation is grounded, and in step a, when arrester electric current is higher than preset threshold value, TVS diode can To be actuated for release current rapidly, inert-gas diode is started later, sustained release electric current.

Further, further include step f, step f is through entire on-line checking process comprising to adding on the magnetic core It is loaded with AC signal, after upper AC signal is loaded on magnetic core, the magnetic flux density of magnetic core will back and forth magnetize in forward and reverse And demagnetization, it can interrupt magnetic polarization process of the external electromagnetic field to magnetic material in this process.

Further, the toroidal shell includes a shield shell and the insulation shell that is set on the outside of the shield shell Body, the magnetic core include two symmetrically arranged arc pellets and a fixing pipe, and two arc pellets are respectively mutually abutted with one end, And in the both sides of the abutted position by the way that on fixing pipe set, the arc pellet is arc made of nano amorphous material Pellet, the fixing pipe are nano amorphous material fixing pipe.

Further, the opening of the magnetic core is formed with an air gap, the two Hall circuit module parallel arranged for interval In in the air gap, the volume occupied by the fixing pipe is a quarter of the accommodating space volume, is located at the fixing pipe The one third that the volume occupied by the part of fixing pipe is the accommodating space volume, position are not put in the arc pellet of side It is the accommodating space body not put on the volume occupied by the part of fixing pipe in the arc pellet of the fixing pipe other side Long-pending one third, the second coil winding include upper second coil around portion and lower second coil around portion, and described upper second Coil is set around the part for not putting on fixing pipe in the arc pellet of the fixing pipe side, lower second coil around portion Be set around the part for not putting on fixing pipe in the arc pellet of the fixing pipe other side around portion, upper second coil around Portion and lower second coil are electrically connected to each other around portion, and the first coil winding is set around the outside of the fixing pipe.

Further, the central monitoring device includes background processor and reservoir, the background processor it is defeated Enter end and be connected to the data sink, the output end of the background processor be connected to the mobile terminal and on Reservoir is stated, the input terminal of the background processor is also associated with an encryption unit, and the output end of the reservoir is connected with one Terminal display, the data sending device are public network signal transmitter unit, and data sink is public network signal receiving unit, The step c include after data acquisition unit obtains the direct current signal value of arrester Leakage Current, the direct current signal value is defeated Go out onto data processing unit；The step d includes after data processing unit is handled by data operation, passing through public network signal Transmitter unit by the coding of the direct current signal value containing arrester Leakage Current, time of measuring or arrester installation site information with Short message form is sent to public network signal receiving unit；The step e includes the short message that background processor receives coding form After breath, is converted into row information, coding information is converted into the movement that Chinese information is sent to related management personnel or maintenance personal In terminal, and the persistence above- mentioned information in reservoir.

Further, the central monitoring device includes background processor and reservoir, the background processor it is defeated Enter end and be connected to the data sink, the output end of the background processor be connected to the mobile terminal and on Reservoir is stated, the input terminal of the background processor is also associated with an encryption unit, and the output end of the reservoir is connected with one Terminal display, the data sending device include in sequentially connected emission of radio frequency signals unit, frequency modulation retransmission unit and Dual mode communication unit, the data sink are that the public network signal being connect with the output end of the dual mode communication unit receives list Member, the step c include after data acquisition unit obtains the direct current signal value of arrester Leakage Current, by the direct current signal value It is output on data processing unit；The step d includes that will contain lightning-arrest after data processing unit is handled by data operation The coding of the direct current signal value of device Leakage Current, time of measuring or arrester installation site information passes through emission of radio frequency signals unit And the cooperation of frequency modulation retransmission unit, ensure communication channel it is unimpeded in the case of, in a manner of private network automatic frequency-hopping will compile Code information is forwarded to by level-one on the bimodulus communication unit of mobile public network signal coverage areas, is then communicated again by bimodulus single Member is sent to public network signal receiving unit in the form of short message；The step e includes that background processor receives coding form It after short message, is converted into row information, coding information, which is converted into Chinese information, is sent to related management personnel or maintenance personal On mobile terminal, and the persistence above- mentioned information in reservoir.

Compared to the prior art, the advantageous effect that the present invention generates is:

1, the configuration of the present invention is simple, highly practical, when the direct current signal of arrester leakage current passes through first coil winding The magnetic field generated in magnetic core afterwards is focused into the two Hall circuit modules, due to the position of the two Hall circuit module Difference is set, thus generates unequal Hall voltage, the two Hall circuit modules are connected via circuit in parallel according to electricity in parallel After the equivalent circuit synthesis of appearance, the output valve for the voltage signal that the two Hall circuit modules generate is that two Hall circuit modules are defeated Go out the arithmetic mean of instantaneous value of value, the output valve of the voltage signal is acted on through power amplifier conducting so that being generated in second coil winding Contrary compensation electric current, the magnetic flux that compensation electric current generates is with flow direction caused by arrester leakage current on the contrary, when the two is real After existing magnetic balance, core flux zero, in second coil winding compensation electric current using after the test of circuit acquisition module to get Go out the direct current signal value of arrester Leakage Current, thus one aspect of the present invention is carried out to lightning arrester leakance using contactless Acquisition, thereby may be ensured that collecting unit can effectively and stably be run in complex electromagnetic fields, not only voltage endurance capability It is greatly promoted, and can have stronger self- recoverage and adaptive ability under overvoltage.Another aspect of the present invention is Have two Hall circuit modules of setting, in this case the Hall element in this two Hall circuit module can be connected into two kinds it is defeated Go out form, the output one is sensor is the arithmetic mean of instantaneous value form of two single Hall output, this kind of method is suitable for closed loop Hall current sensor pattern can considerably reduce the nonlinearity and site error of sensor, improve sensor Anti-interference ability and range ability.Another kind is the sensor that two Halls coordinate certain component to form, and output is poor Form-separating.This kind of double Hall current sensor schemes can inhibit temperature drift and common mode interference from signal source, improve The stability and the linearity of current sensor, and the feature with self compensation and linearity correction, can be to the micro- of the microampere order of magnitude Weak circuit signal carries out online acquisition, and can monitor leakage current in direct current arrester, harmonic wave at any time by central monitoring device And the variation of electrostatic etc., the equipment such as lightning protection telecommunications or electrical and electronics board can be effectively prevent because of grounding resistance mistake Height influences the earthing effect of lightning stroke, effectively prevents the damage and the injures and deaths that cause building and people and animals, and be conducive to extend and keep away The service life of thunder device.

2, in the present invention, maintenance personal can be in time by the central monitoring device with short message or other shapes Formula knows the relevant information of direct current arrester Leakage Current, to both avoid maintenance personnel from frequently patrolling arrester in bad weather Fault point reduces the risk that maintenance personal gets an electric shock, and reduces the time restored needed for line powering.

3, in the present invention, it is modularization of the core sensing element for isolation detection electric current by using double Hall elements Product, since Hall element itself can generate Hall effect, thus its operation principle is to use magnetic balance type principle, that is, is worked as When electric current flows through the straight wire of a root long, generate magnetic field around conducting wire, the size in magnetic field and flow through the size of current of conducting wire at Direct ratio, this magnetic field can be assembled by Hall element, be then detected with double Hall elements, due to magnetic field variation with The output voltage signal of double Hall elements has good linear dependence, therefore the output signal measured using double Hall elements, The size of current in conducting wire is directly reflected, and the advantage of double Hall elements is that its accuracy higher, response are faster, warm Float small, especially under complicated electric field environment, double Hall elements have stronger diamagneticization and anti-polarized characteristic, thus can be with Realize the accurate and stably measured of alternating current and direct current, pulse signal etc..

4, in the present invention, after by loading upper AC signal on magnetic core, the magnetic flux density of magnetic core will positive and It reversely magnetizes and demagnetizes back and forth, magnetic polarization process of the external electromagnetic field to magnetic core can be interrupted in this process.So can be fine The magnetic polarization for avoiding magnetic core, be conducive to improve the present invention accuracy of detection and service life.

5, in the present invention, all lead-in conductors, extraction wire and other it is necessary to part may be selected install additional it is lazy Property gas diode and TVS diodes prevent high current destroy circuit system.Since the TVS diodes startup time is fast, but It is that electric discharge continuous capability is poor；And the startup time of inert-gas diode is slow, electric discharge continuous capability is strong.So the two makes simultaneously With can be good at solving the problems, such as circuit protection.

6, in the present invention, complicated electromagnetic field is other than it can cause magnetic core the influence of magnetic polarization, it is also possible to influence electricity The steady operation of sub-circuit.So the present invention realizes electromagnetic isolation, decoupling filtering by the way that shield shell and insulation shell is arranged Etc. functions, to enable a system to long-time steady operation.And by the way that above-mentioned shield shell and insulation shell is arranged, be conducive to The magnetic flux leakage for reducing magnetic core, accordingly improves measurement accuracy, at the same also can effective shield perimeter electromagnetic field interference, reduce and measure Error.

7, in the present invention, current sensor by nano amorphous material, double Hall elements, nano amorphous material fixing pipe and Shell is shielded to constitute.In order to facilitate the installation of, nano amorphous material is made HALF structures by us.It is installed in nano amorphous material It is fixed using fixing pipe after finishing, to ensure that the material can be docked preferably sensor at work.The present invention is in selection magnetic When property material, the problem of having fully taken into account heavy current impact.So we select nano amorphous and amorphous soft magnet as electric current The core material of sensor.Amorphous soft magnet and nano amorphous material have good recovery capability, in the high current for bearing moment After impact, it can be very good to restore.

8, circuit detection numerical value both can be transferred to central monitoring device by the present invention in the range of having public network covering, It can be in the region of not public network signal by the cooperation of the emission of radio frequency signals unit and frequency modulation retransmission unit, first by thunder It hits information and is dealt into the dual mode communication unit being arranged in public network coverage area, be transferred to central monitoring device again later, in this way The applicable situation of the present invention can be widened significantly so that the direct current arrester being located in some remote mountains or thick forest can also be real-time The information of its Leakage Current is detected online.

9, the present invention can be automatically selected in frequency range by the cooperation of emission of radio frequency signals unit and frequency modulation retransmission unit The farthest frequency point of propagation distance emits collected current data, can overcome the single frequency point propagation distance too short Defect so that applicable situation of the invention is broader.

10, in the present invention, it is produced in magnetic core after first coil winding when the direct current signal of arrester leakage current Raw magnetic field is focused on double Hall elements, and voltage, double Halls will be generated after double hall sensings to this part magnetic flux density Amplification of the voltage signal through operational amplifier that element generates completes the control of discharge to input power so that input electricity The positive interface in source exports Contrary compensation electric current in second coil winding, the magnetic flux and arrester leakage current that compensation electric current generates Generated flow direction makes the magnetic flux density in magnetic core begin on the contrary, control by operational amplifier to Contrary compensation electric current It is definite value eventually, compensates electric current in second coil winding at this time using ground is input to after measuring resistance R1, pass through ammeter To measuring the current values to circulate in resistance R1, and carries out scale operation according to the current values and obtain arrester Leakage Current Direct current signal value, not only circuit structure is simple for the above detection process, manufacturing cost is low, but also detection accuracy is high, Neng Goubao Demonstrate,prove signal detection precision.

Description of the drawings

Fig. 1 is the schematic block circuit diagram of embodiment one in the present invention.

Fig. 2 is the structural schematic diagram of heretofore described data acquisition unit.

Fig. 3 is the schematic block circuit diagram of each component in Fig. 2.

Fig. 4 is the scheme of installation of heretofore described toroidal shell.

Fig. 5 is the schematic block circuit diagram of two Hall circuit modules in the present invention.

Fig. 6 is the schematic block circuit diagram of embodiment two in the present invention.

Specific implementation mode

Illustrate the specific implementation mode of the present invention with reference to the accompanying drawings.

Embodiment one

Referring to Fig.1.A kind of system that UHVDC Arrester leakage circuit is detected online using cloud, including one It is set to the detection device 1 near direct current arrester, the Leakage Current testing result for obtaining the detection device 1 passes Defeated data sending device, data sink, central monitoring device and mobile terminal 3.The data sending device is public affairs Net signal transmitter unit 5, data sink are public network signal receiving unit 6.Public network signal transmitter unit 5 and public network signal connect Mobile public network can be passed through by receiving unit 6（GSM network or GPRS network）Realize data transmission, public network signal receives in the present embodiment The modem of 6 preferred GSM network of unit or GPRS network, 5 preferred GSM network of public network signal transmitter unit or GPRS nets The communication module of network.The central monitoring device includes background processor 40 and reservoir 41, the background processor 40 Input terminal is connected to the data sink, and the output end of the background processor 40 is connected to the mobile terminal 3 And above-mentioned reservoir 41, the input terminal of the background processor 40 are also associated with an encryption unit 42, the reservoir 41 Output end is connected with a terminal display 43.The Enable Pin of the data sink is connected to the defeated of the data sending device Outlet, the Enable Pin of the central monitoring device are connected to the output end of the data sink, the central monitoring device Output end connection and the Enable Pin of the mobile terminal 3.By above-mentioned setting, maintenance personal can pass through the center in time Monitoring device knows the relevant information of direct current arrester Leakage Current in the form of short message or others, to both avoid safeguarding Personnel frequently patrol surge arrester failure point in bad weather, reduce the risk that maintenance personal gets an electric shock, and reduce and restore line powering institute The time needed.

In the present embodiment, one can be built into and collect the various monitoring data of various regions UHVDC Arrester state Big data platform generallys include the Cloud Server by net connection（The as described central monitoring device）, cloud client（I.e. For the mobile terminal 3）With at least one measuring terminals（As it is set to the inspection on each UHVDC Arrester in each power grid Survey device 1 or the detecting instrument and equipment of other direct current arrester status informations, the function packet of these detecting instruments and equipment Include may be implemented to measure grounding resistance, leakage current and the harmonic wave of equipment such as lightning protection or telecommunications, electrical and electronics board, The variation of electrostatic etc.）.In the system normal operation, measuring terminals are by net connection by data transfer to cloud service Device, cloud client obtain required measurement data from Cloud Server, and user inquires measurement data by cloud client, shows Show, export, utilization, the operations such as assessment, it is impossible to positioned at associated pair of Different field to realize conventional measurement techniques The coordination of elephant or correlation measurement are realized and are carried out at the same time real time monitoring and right to multiple measuring terminals so as to shorten time of measuring The long-range measurement of measurand, while being conducive to analyse and study thunder-strike phenomenon scientifically.

Referring to Fig.1.The detection device 1 includes data acquisition unit 10, data processing unit 11, protection circuit unit 12, power supply unit 13 and one acquires protection module 14.

The electric energy output end of the power supply unit 13 is divided into four tunnels, be electrically connected in protection circuit unit 12 electric energy it is defeated The electrical energy inputs and data processing unit 11 for entering end, acquiring the electrical energy inputs of protection module 14, data acquisition unit 10 Electrical energy inputs.At work, the output end of arrester electric current is divided into two-way, is connected to the data acquisition unit 10 all the way Enable Pin, another way be connected to it is described acquisition protection module 14 Enable Pin, it is described acquisition protection module 14 output end connect It is connected to the Enable Pin of the protection circuit unit 12, the Enable Pin of the data processing unit 11 is equipped with two-way, connects institute all the way The output end of data acquisition unit 10 is stated, another way connects the output end of the protection circuit unit 12, when arrester electric current is small In or equal to 1 milliampere hour, acquisition protection module 14 is failure to actuate, and data acquisition unit 10 starts and carries out signal acquisition to electric current It is exported by data processing unit 11 with being passed through after data processing；When arrester electric current is more than 1 milliampere hour, data acquisition unit 10 is not It is dynamic, and the startup of protection module 14 is acquired, high-impedance state is presented to input in the detection device 1, at this time without signal acquisition sum number It is exported according to processing, and via data processing unit 11.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The data acquisition unit 10 includes current sensor 7, power amplifier 8, circuit acquisition module 9.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The current sensor 7 includes a toroidal shell 70, a C-shaped arrangement Magnetic core 71 and two Hall circuit modules 72, an accommodating space 700 is provided in the toroidal shell 70, on the magnetic core 71 Rotating around equipped with a first coil winding 710 and a second coil winding 711, and the magnetic core 71 is installed on the accommodating sky Between in 700, the two Hall circuit modules 72 are installed in the accommodating space 700 and its both ends and the two of the magnetic core 71 End adjoining, is connected with an electric bridge 73 between two Hall circuits, 72 module, the input terminal of the first coil winding 710 with keep away Thunder device leakage current is electrically connected, and the input terminal of the second coil winding 711 and an output end of the power amplifier 8 are electrically connected It connects, another output end of the power amplifier 8 is electrically connected with the circuit acquisition module 9,711 institute of the second coil winding The magnetic flux density direction of generation is opposite with the magnetic flux density direction of the first coil winding 710.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.Each Hall circuit module 72 include a Hall element 720 and With the Hall element 720 be in series one adjustment resistance 722, the Hall circuit module 72 control current terminal parallel connection access in The I+ and I- of one DC constant flowing power 723, and it is VH+'s and VH- that the output end of the two Hall circuit modules 72 is also in parallel Data contacts 721, the power amplifier 8 include one be electrically connected with 721 output end of the data contacts operational amplifier 80, One first triode 81, one second triode 82 and an input power 83, the collector electrical connection of first triode 81 It is connected to the negative of the input power 83 in the collector of the positive interface 830 of the input power 83, second triode 82 The output end of interface 831, the power amplifier 8 is divided into two-way, is connected to the base stage of first triode 81 all the way, another Road is connected to the base stage of second triode, and the amplifying stage of first triode 81 is divided into two-way, is connected to all the way described The input terminal of second coil winding 711, another way are connected to the amplifying stage of second triode 82, the circuit acquisition module 9 including one end are connected to the measurement resistance R1 of 711 output end of the second coil winding and for measuring in the measurement resistance The ammeter A of current values, the other end ground connection for measuring resistance R1.When the direct current signal of arrester leakage current is by the The magnetic field generated in magnetic core after one coil windings is focused into the two Hall circuit modules, due to the two Hall electricity The position of road module is different, thus generates unequal Hall voltage, and the two Hall circuit modules are connected via circuit in parallel After the equivalent circuit synthesis of shunt capacitance, the output valve for the voltage signal that the two Hall circuit modules generate is two Halls The output valve of the arithmetic mean of instantaneous value of circuit module output valve, the voltage signal is acted on through power amplifier conducting so that the second coil Contrary compensation electric current is generated on winding, the magnetic flux and flow direction phase caused by arrester leakage current that compensation electric current generates Instead, after the two realizes magnetic balance, core flux zero, compensation electric current is using circuit acquisition module in second coil winding To get going out the direct current signal value of arrester Leakage Current after test, thus one aspect of the present invention is using contactless to lightning-arrest Device leakage current is acquired, and thereby may be ensured that collecting unit can effectively and stably be run in complex electromagnetic fields, Not only voltage endurance capability is greatly promoted, but also can have stronger self- recoverage and adaptive ability under overvoltage.This hair Bright another aspect is that have two Hall circuit modules of setting, and in this case the Hall element in this two Hall circuit module is equal Two kinds of output forms can be connected into, the output one is sensor is the arithmetic mean of instantaneous value form of two single Hall output, this kind of side Method is suitable for closed-loop Hall current sensor pattern, can considerably reduce the nonlinearity and site error of sensor, carry The high anti-interference ability and range ability of sensor.Another kind is the sensing that two Halls coordinate certain component to form Device, output is difference form.This kind of double Hall current sensor schemes can inhibit temperature drift and are total to from signal source Mould interferes, and improves the stability and the linearity of current sensor, and the feature with self compensation and linearity correction, can be to micro- The faint circuit signal of amperage magnitude carries out online acquisition, and can be monitored in direct current arrester at any time by central monitoring device The variation of leakage current, harmonic wave and electrostatic etc., can effectively prevent the equipment such as lightning protection telecommunications or electrical and electronics board because Grounding resistance is excessively high, influences the earthing effect of lightning stroke, effectively prevents the damage and the injures and deaths that cause building and people and animals, and It is conducive to extend the service life of arrester.It is that core sensing element is used for isolation detection that the present embodiment, which also utilizes double Hall elements, The modular product of electric current, since Hall element itself can generate Hall effect, thus its operation principle is to use magnetic recording level Weighing apparatus formula principle generates magnetic field that is, when electric current flows through the straight wire of a root long around conducting wire, the size in magnetic field and flows through conducting wire Size of current it is directly proportional, this magnetic field can be assembled by Hall element, be then detected with double Hall elements, due to The variation in magnetic field and the output voltage signal of double Hall elements have good linear dependence, therefore are measured using double Hall elements Output signal, directly reflect the size of current in conducting wire, and the advantage of double Hall elements is its accuracy higher, Faster, temperature drift is small for response, and especially under complicated electric field environment, double Hall elements have stronger diamagneticization and resist polarized spy Property, thus the accurate and stably measured that alternating current and direct current, pulse signal may be implemented etc..

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The electric bridge 73 includes two resistance pair 730 being arranged in parallel and resistance pair 731, the contact of the side of the resistance pair 730 and resistance pair 731 is connected in a Hall circuit module 72 Hall element 720 and adjusts The contact of the other side of connecting part among whole resistance 722, the resistance pair 730 and resistance pair 731 is connected to another Hall circuit Hall element 720 and the connecting part among adjustment resistance 722 in module 72, resistance pair 730 and resistance pair 731 include respectively two strings Join the resistance 733 of setting, and in resistance pair 730 in the centre of two 733 wiring of resistance being arranged in series and another resistance pair 731 The intermediate electrical of two 733 wiring of resistance being arranged in series connects.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6.The toroidal shell 70 includes a shield shell 701 and is set to this The insulation shell 702 in 701 outside of shield shell, the magnetic core 71 include that two symmetrically arranged arc pellets 714 and one are solid Fixed tube 715, two arc pellets 714 are respectively mutually abutted with one end, and pass through the fixing pipe 715 in the both sides of the abutted position It puts on, the arc pellet 714 is arc pellet 714 made of nano amorphous material, and the fixing pipe 715 is nano amorphous material Expect fixing pipe 715.Current sensor is by nano amorphous material, double Hall elements, nano amorphous material fixing pipe and shielding shell It constitutes.In order to facilitate the installation of, nano amorphous material is made HALF structures by us.Make after nano amorphous material installs It is fixed with fixing pipe, to ensure that the material can be docked preferably sensor at work.The present invention when selecting magnetic material, The problem of having fully taken into account heavy current impact.So we select nano amorphous and amorphous soft magnet as current sensor Core material.Amorphous soft magnet and nano amorphous material have good recovery capability, after bearing the heavy current impact of moment, It can be very good to restore.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The opening of the magnetic core 71 is formed with an air gap 718, two Halls 72 parallel interval of circuit module is arranged in the air gap, and the volume occupied by the fixing pipe 715 is 700 body of the accommodating space Long-pending a quarter is not put in the arc pellet 714 of 715 side of the fixing pipe occupied by the part of fixing pipe 715 Volume be 700 volume of the accommodating space one third, be located at 715 other side of the fixing pipe arc pellet 714 in The one third that the volume occupied by the part of fixing pipe 715 is 700 volume of the accommodating space, second coil are not put on Winding 711 includes upper second coil around portion and descends the second coil around portion, and upper second coil is set around around portion positioned at described The part of fixing pipe 715 is not put in the arc pellet 714 of 715 side of fixing pipe, lower second coil is set around position around portion The part of fixing pipe 715 is not put in the arc pellet 714 of 715 other side of the fixing pipe, upper second coil is around portion It is electrically connected to each other around portion with lower second coil, the first coil winding 710 is set around the outside of the fixing pipe 715.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6.Two pole of inert gas is added in the extraction wire of the arrester electric current Pipe and TVS diode, TVS diode differential concatenation ground connection.The present embodiment all lead-in conductors, extraction wire and other It is necessary to part may be selected to install inert-gas diode and TVS diodes additional and prevent high current from destroying circuit system.By It is fast in the TVS diodes startup time, but the continuous capability that discharges is poor；And the startup time of inert-gas diode is slow, puts Electric continuous capability is strong.So the two use simultaneously can be good at solving the problems, such as circuit protection.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.It is loaded with AC signal on the magnetic core 71.By adding on magnetic core 71 In load after AC signal, the magnetic flux density of magnetic core 71 will magnetize and demagnetize back and forth in forward and reverse, can be beaten in this process Magnetic polarization process of the disconnected external electromagnetic field to magnetic material.So can be very good to avoid the magnetic polarization of magnetic material.Be conducive to Improve the accuracy of detection and service life of the present invention.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The toroidal shell 70 is set on the ground wire 16 of arrester and it is wrapped Include the left shell half body 705 that can mutually dismantle and right half-shell body 706.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6.When the direct current signal of arrester leakage current is after first coil winding The magnetic field generated in magnetic core is focused on double Hall elements, and electricity will be generated after double hall sensings to this part magnetic flux density Pressure, amplification of the voltage signal through operational amplifier that double Hall elements generate complete the control of discharge to input power, So that the positive interface of input power exports Contrary compensation electric current in second coil winding, the magnetic flux and take shelter from the thunder that compensation electric current generates Flow direction caused by device leakage current makes on the contrary, control by operational amplifier to Contrary compensation electric current in magnetic core Magnetic flux density is always definite value, at this time in second coil winding compensate electric current using measure resistance R1 after be input to ground, By ammeter to measuring the current values that circulate in resistance R1, and according to the current values carry out scale operation obtain it is lightning-arrest The direct current signal value of device Leakage Current, not only circuit structure is simple for the above detection process, manufacturing cost is low, but also detection accuracy Height can ensure signal detection precision.

In addition, since complicated electromagnetic field is other than it can cause magnetic core the influence of magnetic polarization, it is also possible to influence electronics electricity The steady operation on road.So the present invention can also realize electromagnetic isolation, decoupling in terms of wire laying mode, structure design and shell processing The functions such as filtering, to enable a system to long-time steady operation.By the way that shield shell and insulation shell is arranged, advantageously reduce The magnetic flux leakage of magnetic core, accordingly improves measurement accuracy, at the same also can effective shield perimeter electromagnetic field interference, reduce to measure and miss Difference.

Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.The present embodiment is corresponding to let out UHVDC Arrester using cloud The online method for detecting for revealing electric current, includes the following steps：

A, judge whether to carry out signal acquisition to electric current, when arrester electric current is higher than preset threshold value, bis- poles TVS Pipe can be actuated for rapidly release current, and inert-gas diode is started later, sustained release electric current.

B, signal acquisition is carried out to electric current, when the direct current signal of arrester leakage current is after first coil winding 710 The magnetic field generated in magnetic core 71 is focused on double Hall elements 720, due to two Hall element 720 position not Together, thus unequal Hall voltage is generated, the two Hall circuit modules 72 are connected via circuit in parallel according to shunt capacitance Equivalent circuit synthesis after, the output valve for the voltage signal that the two Hall circuit modules 72 generate is two Hall circuit modules 72 The arithmetic mean of instantaneous value of output valve, amplification of the voltage signal through operational amplifier 80 that double Hall elements 720 generate are completed To the control of discharge of input power 83 so that the positive interface 830 of input power 83 exports reversed benefit in second coil winding 711 Electric current is repaid, the magnetic flux that compensation electric current generates is with flow direction caused by arrester leakage current on the contrary, passing through operational amplifier The control of 80 pairs of Contrary compensation electric currents, it is always definite value to make the magnetic flux density in magnetic core 71, is mended in second coil winding 711 at this time Electric current is repaid using ground is input to after measuring resistance R1, by ammeter A to measuring the current values that circulate in resistance R1, And it is the direct current signal value for obtaining arrester Leakage Current to carry out scale operation according to the current values, hence into next step Suddenly.

C, the output of electric current Value Data is formed after being handled the signal of acquisition.

D, the current data of acquisition is summarized by being wirelessly transmitted in central monitoring device, data processing unit 11 After being handled by data operation, by public network signal transmitter unit 5 by the direct current signal value containing arrester Leakage Current, survey The coding of amount time or arrester installation site information is sent to public network signal receiving unit 6 in the form of short message.

E, central monitoring device shows that current data distribution is sent to corresponding arrester management by the current data simultaneously After the mobile terminal 3 of person, specially background processor 40 receive the short message of coding form, converts, will encode into row information Information is converted into Chinese information and is sent on the mobile terminal 3 of related management personnel or maintenance personal, and in reservoir 41 forever Kubo deposits above- mentioned information.

In addition, running through entire on-line checking process, have to being loaded with AC signal on the magnetic core 71, on magnetic core 71 In load after AC signal, the magnetic flux density of magnetic core 71 will magnetize and demagnetize back and forth in forward and reverse, in this process meeting Interrupt magnetic polarization process of the external electromagnetic field to magnetic material.

In addition, being tested by Chinese Academy of Sciences's magnetisable material and device emphasis using nano amorphous material in the present embodiment experiment Room provides.It also passes through the applicant repeatedly to test, magnetic core made from other kinds of nano amorphous material can also complete this The purpose of item application.

Embodiment two

With reference to Fig. 6.The present embodiment and the embodiment of embodiment one are substantially the same, the difference is that：The data Sending device include be in sequentially connected emission of radio frequency signals unit 50, frequency modulation retransmission unit 51 and dual mode communication unit 52, The data sink is the public network signal receiving unit 6 being connect with the output end of the dual mode communication unit 52.

The present embodiment can be made both circuit can to have been detected numerical value in the range of having public network covering using above-mentioned setting It is transferred to central monitoring device, the emission of radio frequency signals unit and frequency modulation can also be passed through in the region of not public network signal Lightning strike information is first dealt into the dual mode communication unit being arranged in public network coverage area, passed again later by the cooperation of retransmission unit It is defeated to arrive central monitoring device, the applicable situation of the present invention can be widened significantly in this way so that be located in some remote mountains or thick forest Direct current arrester can also real-time online detect the information of its Leakage Current.

The present embodiment can be automatically selected in frequency range by the cooperation of emission of radio frequency signals unit and frequency modulation retransmission unit The farthest frequency point of propagation distance emits collected current data, can overcome the single frequency point propagation distance too short Defect so that applicable situation of the invention is broader.

In addition, since the present embodiment is for data sending device and one different from of embodiment, thus the present embodiment uses The online method for detecting that cloud reveals UHVDC Arrester in circuit is also different, the difference is that：

On the one hand, step d includes that after data processing unit is handled by data operation, will contain arrester Leakage Current Direct current signal value, time of measuring or arrester installation site information coding pass through emission of radio frequency signals unit and frequency modulation turns The cooperation of bill member, ensure communication channel it is unimpeded in the case of, coding information is passed through in a manner of private network automatic frequency-hopping Level-one is forwarded on the bimodulus communication unit of mobile public network signal coverage areas, then again by bimodulus communication unit with short message Form is sent to public network signal receiving unit.

On the other hand, it after step e includes the short message that background processor receives coding form, is converted into row information, it will Coding information is converted into Chinese information and is sent on the mobile terminal of related management personnel or maintenance personal, and in reservoir forever Kubo deposits above- mentioned information.

The specific implementation mode of the present invention is above are only, but the design concept of the present invention is not limited thereto, it is all to utilize this Conceive the change for carrying out unsubstantiality to the present invention, the behavior for invading the scope of the present invention should all be belonged to.

Claims (8)

1. the method detected online to UHVDC Arrester Leakage Current using cloud, which is characterized in that detectd using one Examining system is respectively completed following steps：A, judge whether to carry out signal acquisition to electric current；B, signal acquisition is carried out to electric current；C, will The signal of acquisition forms current data output after being handled；D, by the current data of acquisition by being wirelessly transmitted to central monitoring Summarized in device；E, it is corresponding lightning-arrest to show that current data distribution is sent to by the current data simultaneously for central monitoring device The mobile terminal of device manager, the detecting system include one be set near direct current arrester detection device, for should Detection device obtain Leakage Current testing result be transmitted data sending device, data sink, central monitoring dress It sets and mobile terminal, the Enable Pin of the data sink is connected to the output end of the data sending device, in described The Enable Pin of centre monitoring device is connected to the output end of the data sink, the output end connection of the central monitoring device In the Enable Pin of the mobile terminal；The detection device includes data acquisition unit, data processing unit, protection circuit unit And power supply unit, the data acquisition unit include current sensor, power amplifier and circuit acquisition module, the electricity Flow sensor include a toroidal shell, one in C shapes arrangement magnetic core and two Hall circuit modules, set in the toroidal shell It is equipped with an accommodating space, rotating around equipped with a first coil winding and a second coil winding on the magnetic core, and the magnetic Core is installed in the accommodating space, the two Hall circuit modules be installed in the accommodating space and its both ends with it is described The both ends of magnetic core abut, and an electric bridge is connected between the two Hall circuit modules；Each Hall circuit module includes one Hall element and the adjustment resistance being in series with the Hall element, the control current terminal of the Hall circuit module simultaneously couple Enter DC constant flowing power an I+ and I-, and it is VH+'s and VH- that the output end of the two Hall circuit modules is also in parallel Data contacts, the power amplifier include one be electrically connected with the data contacts output end operational amplifier, one the 1st Pole pipe, one second triode and an input power, the collector of first triode are electrically connected to the input power The collector of positive interface, second triode is connected to the negative interface of the input power, the output of the operational amplifier End is divided into two-way, is connected to the base stage of first triode all the way, and another way is connected to the base stage of second triode, The amplifying stage of first triode is divided into two-way, is connected to the input terminal of the second coil winding, another way connection all the way In the amplifying stage of second triode, the circuit acquisition module includes that one end is connected to the second coil winding output end Measurement resistance R1 and ammeter for measuring current values in the measurement resistance, the other end for measuring resistance R1 Ground connection；The electric bridge includes two resistance pair being arranged in parallel, and the contact of the side of two resistance pair is connected to a Hall circuit mould Hall element is connected to another Hall circuit with the connecting part among adjustment resistance, the contact of the other side of two resistance pair in block Hall element and the connecting part among adjustment resistance in module, the two each resistance of resistance centering being arranged in parallel are to including respectively two The resistance being arranged in series, and the centre for the resistor wiring that wherein a resistance centering two is arranged in series is gone here and there with another resistance centering two The intermediate electrical for joining the resistor wiring of setting connects；The input terminal of the first coil winding is electrically connected with lightning arrester leakance, institute The input terminal for stating second coil winding is electrically connected with an output end of the power amplifier, the power amplifier it is another defeated Outlet is electrically connected with the circuit acquisition module, and the detection device further includes an acquisition protection module, the power supply unit Electric energy output end is divided into four tunnels, and it is defeated to be electrically connected the electrical energy inputs in protection circuit unit, the electric energy of acquisition protection module Enter end, the electrical energy inputs of data acquisition unit and data processing unit electrical energy inputs, the output end of arrester electric current It is divided into two-way, is connected to the Enable Pin of the data acquisition unit all the way, another way is connected to making for the acquisition protection module Energy end, the output end of the acquisition protection module are connected to the Enable Pin of the protection circuit unit, the data processing unit Enable Pin be equipped with two-way, connect the output end of the data acquisition unit all the way, another way connects the protection circuit unit Output end；After the step a is included in the extraction wire for connecting arrester electric current, adopted by acquiring protection module and data Collect unit and Preliminary detection is carried out to the electric current on lead, when arrester electric current is less than or equal to 1 milliampere hour, acquisition protection module It is failure to actuate, and data acquisition unit starts and defeated by data processing unit to being passed through after electric current progress signal acquisition and data processing Go out；When arrester electric current is more than 1 milliampere hour, data acquisition unit is motionless, and acquires protection module startup, the detection device High-impedance state is presented to input, at this time without signal acquisition and data processing, is also exported not via data processing unit；The ring Shape shell includes a shield shell and the insulation shell that is set on the outside of the shield shell, and the magnetic core is symmetrically set including two The arc pellet set and a fixing pipe, two arc pellets are respectively mutually abutted with one end, and logical in the both sides of the abutted position It crosses the fixing pipe to put on, the arc pellet is arc pellet made of nano amorphous material, and the fixing pipe is that nanometer is non- Brilliant material fixing pipe；The toroidal shell be set in the left shell half body that on the ground wire of arrester and it, which includes, mutually to dismantle with And right half-shell body.

2. the method detected online to UHVDC Arrester Leakage Current using cloud as described in claim 1, special Sign is：The step b includes when the direct current signal of arrester leakage current generates after first coil winding in magnetic core Magnetic field be focused into the two Hall circuit modules, since the position of the two Hall circuit module is different, thus produce Raw unequal Hall voltage, the two Hall circuit modules are connected via circuit in parallel and are closed according to the equivalent circuit of shunt capacitance The output valve of Cheng Hou, the voltage signal that the two Hall circuit modules generate are the arithmetic average of two Hall circuit module output valves Value, the output valve of the voltage signal is acted on through power amplifier conducting to generate Contrary compensation electric current in second coil winding, Compensate flow direction caused by magnetic flux and the arrester leakage current that electric current generates on the contrary, when both realization magnetic balance after, magnetic Core magnetic flux is zero, in second coil winding compensate electric current using after the test of circuit acquisition module to get go out arrester leakage The direct current signal value of electric current is hence into c steps.

3. the method detected online to UHVDC Arrester Leakage Current using cloud as described in claim 2, special Sign is：The step b includes, when the direct current signal of arrester leakage current produces after first coil winding in magnetic core Raw magnetic field is focused on two Hall elements, since the position of the two Hall circuit module is different, thus generates not phase Deng Hall voltage, the two Hall circuit modules via circuit in parallel connect according to shunt capacitance equivalent circuit synthesis after, The output valve for the voltage signal that the two Hall circuit modules generate is the arithmetic mean of instantaneous value of two Hall circuit module output valves, should Amplification of the output valve of voltage signal through operational amplifier completes the control of discharge to input power so that input power Positive interface export Contrary compensation electric current in second coil winding, the magnetic flux and arrester leakage current institute that compensation electric current generates The flow direction of generation makes magnetic flux density in magnetic core always on the contrary, control by operational amplifier to Contrary compensation electric current For definite value, electric current is compensated in second coil winding at this time using ground is input to after measuring resistance R1, passes through ammeter pair The current values to circulate in resistance R1 are measured, and carries out scale operation according to the current values and obtains arrester Leakage Current Direct current signal value, hence into c steps.

4. the method detected online to UHVDC Arrester Leakage Current using cloud as described in claim 3, special Sign is：Inert-gas diode and TVS diodes are added in the extraction wire of arrester electric current, the TVS diodes Differential concatenation is grounded, and in step a, when arrester electric current is higher than preset threshold value, TVS diodes can open rapidly Dynamic to carry out release current, inert-gas diode is started later, sustained release electric current.

5. the method detected online to UHVDC Arrester Leakage Current using cloud as described in claim 4, special Sign is：Further include step f, step f runs through entire on-line checking process comprising to being loaded with exchange on the magnetic core Signal, after upper AC signal is loaded on magnetic core, the magnetic flux density of magnetic core will magnetize and demagnetize back and forth in forward and reverse, This process can interrupt magnetic polarization process of the external electromagnetic field to magnetic material.

6. the method detected online to UHVDC Arrester Leakage Current using cloud as described in claim 1, special Sign is：The opening of the magnetic core is formed with an air gap, the two Hall circuit module parallel arranged for interval in the air gap, Volume occupied by the fixing pipe is a quarter of the accommodating space volume, is located at the arc core of the fixing pipe side The one third that the volume occupied by the part of fixing pipe is the accommodating space volume is not put in block, is located at the fixing pipe The one third that the volume occupied by the part of fixing pipe is the accommodating space volume is not put in the arc pellet of the other side, The second coil winding includes upper second coil around portion and descends the second coil around portion, and upper second coil is set around around portion The part of fixing pipe is not put in the arc pellet of the fixing pipe side, lower second coil is set around around portion to be located at The part of fixing pipe is not put in the arc pellet of the fixing pipe other side, upper second coil is around portion and lower second coil It is electrically connected to each other around portion, the first coil winding is set around the outside of the fixing pipe.

7. the method detected online to UHVDC Arrester Leakage Current using cloud as claimed in claim 6, special Sign is：The central monitoring device includes background processor and reservoir, and the input terminal of the background processor is connected to The output end of the data sink, the background processor is connected to the mobile terminal and above-mentioned reservoir, The input terminal of the background processor is also associated with an encryption unit, and the output end of the reservoir is connected with a terminal and shows Device, the data sending device are public network signal transmitter unit, and data sink is public network signal receiving unit, the step C includes that the direct current signal value is output to data after data acquisition unit obtains the direct current signal value of arrester Leakage Current On processing unit；The step d includes passing through public network signal after data processing unit is handled by data operation and emitting list Member is by the coding of the direct current signal value containing arrester Leakage Current, time of measuring or arrester installation site information with short message Form is sent to public network signal receiving unit；After the step e includes the short message that background processor receives coding form, It is converted into row information, coding information is converted into the mobile terminal that Chinese information is sent to related management personnel or maintenance personal On, and the persistence above- mentioned information in reservoir.

8. the method detected online to UHVDC Arrester Leakage Current using cloud as claimed in claim 7, special Sign is：The central monitoring device includes background processor and reservoir, and the input terminal of the background processor is connected to The output end of the data sink, the background processor is connected to the mobile terminal and above-mentioned reservoir, The input terminal of the background processor is also associated with an encryption unit, and the output end of the reservoir is connected with a terminal and shows Device, the data sending device include in sequentially connected emission of radio frequency signals unit, frequency modulation retransmission unit and dual mode communication Unit, the data sink are the public network signal receiving unit being connect with the output end of the dual mode communication unit, the step Rapid c includes that the direct current signal value is output to number after data acquisition unit obtains the direct current signal value of arrester Leakage Current According on processing unit；The step d includes that will contain arrester after data processing unit is handled by data operation and reveal The coding of the direct current signal value of electric current, time of measuring or arrester installation site information passes through emission of radio frequency signals unit and tune The cooperation of frequency retransmission unit, ensure communication channel it is unimpeded in the case of, by coding information in a manner of private network automatic frequency-hopping It is forwarded on the bimodulus communication unit of mobile public network signal coverage areas by level-one, then again by bimodulus communication unit with short Message form is sent to public network signal receiving unit；The step e includes the short message that background processor receives coding form Afterwards, it is converted into row information, coding information is converted into the mobile end that Chinese information is sent to related management personnel or maintenance personal On end, and the persistence above- mentioned information in reservoir.