CN105588976A - Voltage and current combined sensor and voltage and current detection system - Google Patents
Voltage and current combined sensor and voltage and current detection system Download PDFInfo
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- CN105588976A CN105588976A CN201510981010.2A CN201510981010A CN105588976A CN 105588976 A CN105588976 A CN 105588976A CN 201510981010 A CN201510981010 A CN 201510981010A CN 105588976 A CN105588976 A CN 105588976A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The application provides a voltage and current combined sensor and a voltage and current detection system. The voltage and current combined sensor comprises a fixed support, a movable support, a first lead fixing mechanism, a second lead fixing mechanism, a locking handle, a linkage mechanism, an electric field sensor probe and a magnetic field sensor probe. The electric field sensor probe comprises a PCB substrate, a first electrode group, a second electrode group, a first binding post and a second binding post; the first electrode group comprises a plurality of semiorbicular first electrodes successively in series connection, and the second electrode group comprises a plurality of semiorbicular first electrodes successively in series connection; the magnetic field sensor probe comprises a first iron core, a second iron core, a Rogowski coil, a third binding post and a fourth binding post. The voltage and current combined sensor reduces insulation design costs, does not need to be in direct electrical connection with a power transmission line to be detected, and improves safety.
Description
Technical field
The application relates to power domain, particularly a kind of electric current and voltage combined sensor and electric current and voltage detection system.
Background technology
Safe, the reliable and economical operation of voltage, current measurement and the power system of transmission line of electricity is closely related, is the important step during power system is safeguarded. Efficiently, the metering system of safety is the effective way that improves maintenance efficiency and grid supply quality.
In current power transmission circuit, voltage, current measurement mainly realize by transformer, and traditional transformer need to directly be electrically connected with transmission line of electricity, require high to the insulating properties of transformer, cause insulating Design cost high, and transformer need to directly be electrically connected with transmission line of electricity, poor stability.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of electric current and voltage combined sensor and electric current and voltage detection system, reduces insulating Design cost, and improve the object of security to reach, and technical scheme is as follows:
A kind of electric current and voltage combined sensor, comprising: fixed support, travel(l)ing rest, the first wire fixed mechanism and the second wire fixed mechanism, set lever, linkage, electric-field sensor probe and magnetic field sensor probe head;
Described electric-field sensor probe comprises: PCB substrate, the first electrode group, the second electrode group, the first binding post and the second binding post, described the first electrode group comprises multiple the first electrodes of the semi-circular structure of series connection successively, and described the second electrode group comprises multiple the second electrodes of the semi-circular structure of series connection successively;
Described magnetic field sensor probe head comprises the first iron core, the second iron core, Luo-coil, the 3rd binding post and the 4th binding post;
Described the first iron core is fixedly connected with described fixed support, described the second iron core is fixedly connected with described travel(l)ing rest, described the first iron core and described the second iron core are semi-circular structure and are oppositely arranged, described electric-field sensor probe is fixedly connected with described fixed support and arranges with described the first iron core is close, in described the first wire fixed mechanism is fixedly connected with and is arranged on the open area of described the first iron core with described fixed support, in described the second wire fixed mechanism is fixedly connected with and is arranged on the open area of described the second iron core with described travel(l)ing rest, described travel(l)ing rest can move on described fixed support, described travel(l)ing rest is connected with described set lever by described linkage,
Described the first electrode group is arranged on the front of described PCB substrate, described the second electrode group is arranged on the reverse side of described PCB substrate, and described the first electrode group and described the second electrode group are crisscross arranged, described the first binding post is connected with each first electrode respectively, and described the second binding post is connected with each second electrode respectively;
Described Luo-coil is wrapped on described the first iron core and described the second iron core, and described the 3rd binding post is connected with one end of described Luo-coil, and described the 4th binding post is connected with the other end of described Luo-coil;
In the time that described the first wire fixed mechanism and described the second wire fixed mechanism are locked on transmission line of electricity to be detected, elect magnetic field in described transmission line of electricity of described the first electrode group and described the second electrode group also produces potential difference signal, described potential difference signal transfers to voltage check device by described the first binding post and described the second wiring, and the elect magnetic field of described Luo-coil in described transmission line of electricity to be detected also produces induced electromotive force signal, described induced electromotive force signal transfers to current sensing means by described the 3rd binding post and described the 4th binding post.
Preferably, described the first wire fixed mechanism is specially: rubber the first wire fixed mechanism;
Described the second wire fixed mechanism is specially: rubber the second wire fixed mechanism.
Preferably, described the first iron core is specially: silicon steel sheet;
Described the second iron core is specially: silicon steel sheet.
Preferably, described fixed support is specially: polytetrafluoroethylene (PTFE) fixed support;
Described travel(l)ing rest is specially: polytetrafluoroethylene (PTFE) travel(l)ing rest.
Preferably, described fixed support is specially: nylon plastic(s) fixed support;
Described travel(l)ing rest is specially: nylon plastic(s) travel(l)ing rest.
A kind of electric current and voltage detection system, comprising: voltage check device, current sensing means and the electric current and voltage combined sensor as described in above-mentioned any one;
Described voltage check device is connected with described electric current and voltage combined sensor, and described current sensing means is connected with described electric current and voltage combined sensor;
Described voltage check device, for the potential difference signal of described electric current and voltage combined sensor output is processed, obtains the voltage of transmission line of electricity to be detected;
Described current sensing means, for the induced electromotive force signal of described electric current and voltage combined sensor output is processed, obtains the electric current of described transmission line of electricity to be detected.
Preferably, described voltage check device comprises: the first pre-differential amplifier circuit, the first bandwidth-limited circuit, the first Programmable Gain Amplifier Circuit, A/D change-over circuit and a first processor;
Described the first pre-differential amplifier circuit, for the common mode interference signal of potential difference signal described in filtering, obtains the first sub-potential difference signal;
Described the first bandwidth-limited circuit, for the high-frequency interferencing signal of the first sub-potential difference signal described in filtering, obtains the second sub-potential difference signal;
Described the first Programmable Gain Amplifier Circuit, for described the second sub-potential difference signal is amplified, obtains the 3rd sub-potential difference signal;
A described A/D change-over circuit, for being converted to the first data signal by described the 3rd sub-potential difference signal;
Described first processor, for described the first data signal is multiplied by predeterminated voltage proportionality coefficient, obtains the voltage of described transmission line of electricity to be detected.
Preferably, described current sensing means comprises: the second pre-differential amplifier circuit, the second bandwidth-limited circuit, the second Programmable Gain Amplifier Circuit, the 2nd A/D change-over circuit and the second processor;
Described the second pre-differential amplifier circuit, for the common mode interference signal of induced electromotive force signal described in filtering, obtains the first sub-induced electromotive force signal;
Described the second bandwidth-limited circuit, for the high-frequency interferencing signal of the first sub-induced electromotive force signal described in filtering, obtains the second sub-induced electromotive force signal;
Described the second Programmable Gain Amplifier Circuit, for described the second sub-induced electromotive force signal is amplified, obtains the 3rd sub-induced electromotive force signal;
Described the 2nd A/D change-over circuit, for being converted to the second data signal by described the 3rd sub-induced electromotive force signal;
Described the second processor, for described the second data signal is multiplied by predetermined current proportionality coefficient, obtains the electric current of described transmission line of electricity to be detected.
Compared with prior art, the application's beneficial effect is:
In this application, by the first wire fixed mechanism and the second wire fixed mechanism, electric current and voltage combined sensor is fixed on transmission line of electricity to be detected, by the detection to transmission line of electricity to be detected electromagnetic field around, realize the detection of the voltage and current to transmission line of electricity to be detected, do not need to be directly electrically connected with transmission line of electricity to be detected, therefore less demanding to the insulating properties of electric current and voltage combined sensor, reduce insulating Design cost, and do not need to be directly electrically connected with transmission line of electricity to be detected, improved security.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of structural representation of the electric current and voltage combined sensor that provides of the application;
Fig. 2 is electric current and voltage combined sensor that the application the provides a kind of structural representation while being locked;
Fig. 3 is a kind of structural representation of the electric-field sensor probe that provides of the application;
Fig. 4 is a kind of structural representation that the electric current and voltage combined sensor that provides of the application is installed;
Fig. 5 is the another kind of structural representation that the electric current and voltage combined sensor that provides of the application is installed;
Fig. 6 is a kind of logical construction schematic diagram of the electric current and voltage detection system that provides of the application;
Fig. 7 is a kind of logical construction schematic diagram of the voltage check device that provides of the application;
Fig. 8 is a kind of logical construction schematic diagram of the current sensing means that provides of the application.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment. Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Embodiment mono-
In the present embodiment, show a kind of electric current and voltage combined sensor, please also refer to Fig. 1 to Fig. 5, electric current and voltage combined sensor comprises: fixed support 1, travel(l)ing rest 2, the first wire fixed mechanism 3 and the second wire fixed mechanism 4, set lever 5, linkage 6, electric-field sensor probe 7 and magnetic field sensor probe head.
Described electric-field sensor probe 7 comprises: PCB substrate 11, the first electrode group, the second electrode group, the first binding post 12 and the second binding post 13, described the first electrode group comprises multiple the first electrodes 14 of the semi-circular structure of series connection successively, and described the second electrode group comprises multiple the second electrodes 15 of the semi-circular structure of series connection successively.
Described magnetic field sensor probe head comprises the first iron core 18, the second iron core 19, Luo-coil, the 3rd binding post and the 4th binding post;
Described the first iron core 18 is fixedly connected with described fixed support 1, described the second iron core 19 is fixedly connected with described travel(l)ing rest 2, described the first iron core 18 and described the second iron core 19 are semi-circular structure and are oppositely arranged, described electric-field sensor probe 7 be fixedly connected with described fixed support 1 and with described the first iron core 18 near setting, described the first wire fixed mechanism 3 is fixedly connected with and is arranged in the open area of described the first iron core 18 with described fixed support 1, described the second wire fixed mechanism 4 is fixedly connected with and is arranged in the open area of described the second iron core 19 with described travel(l)ing rest 2, described travel(l)ing rest 2 can move on described fixed support 1, described travel(l)ing rest 2 is connected with described set lever 5 by described linkage 6.
Described the first electrode group is arranged on the front of described PCB substrate 11, described the second electrode group is arranged on the reverse side of described PCB substrate 11, and described the first electrode group and described the second electrode group are crisscross arranged, described the first binding post 12 is connected with each first electrode 14 respectively, and described the second binding post 13 is connected with each second electrode 15 respectively.
Described Luo-coil is wrapped on described the first iron core 18 and described the second iron core 19, and described the 3rd binding post is connected with one end of described Luo-coil, and described the 4th binding post is connected with the other end of described Luo-coil.
In the time that described the first wire fixed mechanism 3 and described the second wire fixed mechanism 4 are locked on transmission line of electricity to be detected, elect magnetic field in described transmission line of electricity of described the first electrode group and described the second electrode group also produces potential difference signal, described potential difference signal transfers to voltage check device by described the first binding post 12 and described the second wiring, and the elect magnetic field of described Luo-coil in described transmission line of electricity to be detected also produces induced electromotive force signal, described induced electromotive force signal transfers to current sensing means by described the 3rd binding post and described the 4th binding post.
In the present embodiment, in the time that the first wire fixed mechanism 3 and the second wire fixed mechanism 4 are locked on transmission line of electricity to be detected, electric-field sensor probe 7 keeps coaxial direction with transmission line of electricity to be detected, the first electrode group and the elect magnetic field of described the second electrode group in described transmission line of electricity, the surface of the surface of each the first electrode 14 and each the second electrode 15 all can induce electric charge, due to the first electrode group and the second electrode group earth-free, therefore the accumulation inducing is on the surface of electrode, and it is different with the current potential of the second electrode group that the first electrode group and the second electrode group are crisscross arranged to realize the first electrode group, form potential difference signal.
In this application, by the first wire fixed mechanism 3 and the second wire fixed mechanism 4, electric current and voltage combined sensor is fixed on transmission line of electricity to be detected, by the detection to transmission line of electricity to be detected electromagnetic field around, realize the detection of the voltage and current to transmission line of electricity to be detected, do not need to be directly electrically connected with transmission line of electricity to be detected, therefore less demanding to the insulating properties of electric current and voltage combined sensor, reduce insulating Design cost, and do not need to be directly electrically connected with transmission line of electricity to be detected, improved security.
Further, because electric-field sensor probe 7 does not have iron core, therefore without the impact of considering that ferromagnetic resonance phenomenon is brought to the electrical network quality of power supply.
And electric current and voltage combined sensor and transmission line of electricity to be detected be directly electrical connection not, can the in the situation that of not power-off, install, easy to install.
In the present embodiment, though the wire of transmission line of electricity has national standard, but the thickness of different its wires of electric pressure is different, therefore designs the first wire fixed mechanism 3 with the second wire fixed mechanism 4 to adapt to the different wire of model. In the time of tension set lever 5, the first wire fixed mechanism 3 and the second wire fixed mechanism 4 can tightly be stuck on transmission line of electricity, make electric-field sensor probe 7 and magnetic field sensor probe head and transmission line of electricity keep coaxial direction, meet the requirement detecting.
In the present embodiment, the first wire fixed mechanism 3 is specifically as follows rubber the first wire fixed mechanism 3, the second wire fixed mechanism 4 is specifically as follows rubber the second wire fixed mechanism 4, and what the first wire fixed mechanism 3 and the second wire fixed mechanism 4 adopted is elastomeric material.
In the present embodiment, described the first iron core 18 is specially: silicon steel sheet; Described the second iron core 19 is specially: silicon steel sheet.
In the present embodiment, described fixed support 1 is specially: polytetrafluoroethylene (PTFE) fixed support; Described travel(l)ing rest 2 is specially: polytetrafluoroethylene (PTFE) travel(l)ing rest.
Certainly, described fixed support 1 can be also: nylon plastic(s) fixed support; Described travel(l)ing rest 2 is: nylon plastic(s) travel(l)ing rest.
In the present embodiment, while using electric current and voltage combined sensor, can utilize insulation stock P that electric current and voltage combined sensor is stuck on transmission line of electricity, first electric current and voltage combined sensor be opened, as shown in Figure 4. In the time that electric current and voltage combined sensor is stuck on transmission line of electricity, the handle of pressing insulation stock, makes electric current and voltage combined sensor in locking state, then takes off insulation stock, electric current and voltage combined sensor just can be fixed on transmission line of electricity, as shown in Figure 5.
Embodiment bis-
In the present embodiment, provide a kind of electric current and voltage detection system, refer to Fig. 6, electric current and voltage detection system comprises: voltage check device 61, current sensing means 62 and electric current and voltage combined sensor 63.
The concrete structure of electric current and voltage combined sensor 63 and correlation function refer to the electric current and voltage combined sensor shown in embodiment mono-, do not repeat them here.
Described voltage check device 61 is connected with described electric current and voltage combined sensor 63, and described current sensing means 62 is connected with described electric current and voltage combined sensor 63.
Described voltage check device 61, processes for the potential difference signal that described electric current and voltage combined sensor 63 is exported, and obtains the voltage of transmission line of electricity to be detected.
Described current sensing means 62, processes for the induced electromotive force signal that described electric current and voltage combined sensor 63 is exported, and obtains the electric current of described transmission line of electricity to be detected.
In the present embodiment, described voltage check device 61 comprises: the first pre-differential amplifier circuit 71, the first bandwidth-limited circuit 72, the first Programmable Gain Amplifier Circuit 73, an A/D change-over circuit 74 and first processor 75.
Described the first pre-differential amplifier circuit 71, for the common mode interference signal of potential difference signal described in filtering, obtains the first sub-potential difference signal.
Described the first bandwidth-limited circuit 72, for the high-frequency interferencing signal of the first sub-potential difference signal described in filtering, obtains the second sub-potential difference signal.
Described the first Programmable Gain Amplifier Circuit 73, for described the second sub-potential difference signal is amplified, obtains the 3rd sub-potential difference signal.
A described A/D change-over circuit 74, for being converted to the first data signal by described the 3rd sub-potential difference signal.
Described first processor 75, for described the first data signal is multiplied by predeterminated voltage proportionality coefficient, obtains the voltage of described transmission line of electricity to be detected.
Because the voltage of the potential difference between the first electrode group in electric current and voltage combined sensor 63 and the second electrode group and transmission line of electricity to be detected is linear, therefore the first data signal is multiplied by predeterminated voltage proportionality coefficient, can obtains the voltage of transmission line of electricity to be detected.
Wherein, predeterminated voltage proportionality coefficient can be determined by experiment.
Current sensing means 62 comprises: the second pre-differential amplifier circuit 81, the second bandwidth-limited circuit 82, the second Programmable Gain Amplifier Circuit 83, the 2nd A/D change-over circuit 84 and the second processor 85.
Described the second pre-differential amplifier circuit 81, for the common mode interference signal of induced electromotive force signal described in filtering, obtains the first sub-induced electromotive force signal.
Described the second bandwidth-limited circuit 82, for the high-frequency interferencing signal of the first sub-induced electromotive force signal described in filtering, obtains the second sub-induced electromotive force signal.
Described the second Programmable Gain Amplifier Circuit 83, for described the second sub-induced electromotive force signal is amplified, obtains the 3rd sub-induced electromotive force signal.
Described the 2nd A/D change-over circuit 84, for being converted to the second data signal by described the 3rd sub-induced electromotive force signal.
Described the second processor 85, for described the second data signal is multiplied by predetermined current proportionality coefficient, obtains the electric current of described transmission line of electricity to be detected.
In the present embodiment, due to the induced electromotive force of magnetic field sensor probe head output and the electric current of transmission line of electricity to be detected linear, therefore the second data signal is multiplied by predetermined current proportionality coefficient and can obtains the electric current of transmission line of electricity to be detected.
In the present embodiment, predetermined current proportionality coefficient is determined by experiment.
It should be noted that, each embodiment in this description all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to. For device class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially. And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment. The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
A kind of electric current and voltage combined sensor and the electric current and voltage detection system that above the application are provided are described in detail, applied principle and the embodiment of specific case to the application herein and set forth, the explanation of above embodiment is just for helping to understand the application's method and core concept thereof; , for one of ordinary skill in the art, according to the application's thought, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application meanwhile.
Claims (8)
1. an electric current and voltage combined sensor, is characterized in that, comprising: fixed support, activitySupport, the first wire fixed mechanism and the second wire fixed mechanism, set lever, linkage, electric fieldSensor probe and magnetic field sensor probe head;
Described electric-field sensor probe comprises: PCB substrate, the first electrode group, the second electrode group, firstBinding post and the second binding post, described the first electrode group comprise multiple series connection successively semi-circular structures theOne electrode, described the second electrode group comprises multiple the second electrodes of the semi-circular structure of series connection successively;
Described magnetic field sensor probe head comprises the first iron core, the second iron core, Luo-coil, the 3rd binding postWith the 4th binding post;
Described the first iron core is fixedly connected with described fixed support, described the second iron core and described travel(l)ing restBe fixedly connected with, described the first iron core and described the second iron core are semi-circular structure and are oppositely arranged, described inElectric-field sensor probe is fixedly connected with described fixed support and arranges with described the first iron core is close, described inThe first wire fixed mechanism and described fixed support are fixedly connected with and are arranged on the opening of described the first iron coreIn region, described the second wire fixed mechanism is fixedly connected with and is arranged on described second with described travel(l)ing restIn the open area of iron core, described travel(l)ing rest can move on described fixed support, described travel(l)ing restBe connected with described set lever by described linkage;
Described the first electrode group is arranged on the front of described PCB substrate, and described the second electrode group is arranged onThe reverse side of described PCB substrate, and described the first electrode group and described the second electrode group be crisscross arranged, instituteState the first binding post and be connected with each first electrode respectively, described the second binding post respectively with each the second electricityExtremely connected;
Described Luo-coil is wrapped on described the first iron core and described the second iron core, described the 3rd binding postBe connected with one end of described Luo-coil, the other end phase of described the 4th binding post and described Luo-coilConnect;
Be locked at transmission of electricity to be detected at described the first wire fixed mechanism and described the second wire fixed mechanismOn circuit time, described the first electrode group and the elect magnetic field of described the second electrode group in described transmission line of electricityAnd producing potential difference signal, described potential difference signal passes by described the first binding post and described the second wiringTransport to voltage check device, and the elect magnetic field of described Luo-coil in described transmission line of electricity to be detected alsoProduce induced electromotive force signal, described induced electromotive force signal is by described the 3rd binding post and the described the 4thBinding post transfers to current sensing means.
2. electric current and voltage combined sensor according to claim 1, is characterized in that, described inThe first wire fixed mechanism is specially: rubber the first wire fixed mechanism;
Described the second wire fixed mechanism is specially: rubber the second wire fixed mechanism.
3. electric current and voltage combined sensor according to claim 1, is characterized in that, described inThe first iron core is specially: silicon steel sheet;
Described the second iron core is specially: silicon steel sheet.
4. electric current and voltage combined sensor according to claim 1, is characterized in that, described inFixed support is specially: polytetrafluoroethylene (PTFE) fixed support;
Described travel(l)ing rest is specially: polytetrafluoroethylene (PTFE) travel(l)ing rest.
5. electric current and voltage combined sensor according to claim 1, is characterized in that, described inFixed support is specially: nylon plastic(s) fixed support;
Described travel(l)ing rest is specially: nylon plastic(s) travel(l)ing rest.
6. an electric current and voltage detection system, is characterized in that, comprising: voltage check device, electric currentCheckout gear and the electric current and voltage combined sensor as described in claim 1-5 any one;
Described voltage check device is connected with described electric current and voltage combined sensor, described current detecting dressPut with described electric current and voltage combined sensor and be connected;
Described voltage check device, for the potential difference letter to described electric current and voltage combined sensor outputNumber process, obtain the voltage of transmission line of electricity to be detected;
Described current sensing means, for electronic to inducting of described electric current and voltage combined sensor outputGesture signal is processed, and obtains the electric current of described transmission line of electricity to be detected.
7. electric current and voltage detection system according to claim 6, is characterized in that, described voltageCheckout gear comprises: the first pre-differential amplifier circuit, the first bandwidth-limited circuit, the first increasing able to programmeBenefit amplifying circuit, A/D change-over circuit and a first processor;
Described the first pre-differential amplifier circuit, for the common mode disturbances letter of potential difference signal described in filteringNumber, obtain the first sub-potential difference signal;
Described the first bandwidth-limited circuit, for the High-frequency Interference of the first sub-potential difference signal described in filteringSignal, obtains the second sub-potential difference signal;
Described the first Programmable Gain Amplifier Circuit, for putting described the second sub-potential difference signalObtain the 3rd sub-potential difference signal greatly;
A described A/D change-over circuit, for being converted to the first numeral by described the 3rd sub-potential difference signalSignal;
Described first processor, for described the first data signal is multiplied by predeterminated voltage proportionality coefficient,To the voltage of described transmission line of electricity to be detected.
8. electric current and voltage detection system according to claim 6, is characterized in that, described electric currentCheckout gear comprises: the second pre-differential amplifier circuit, the second bandwidth-limited circuit, the second increasing able to programmeBenefit amplifying circuit, the 2nd A/D change-over circuit and the second processor;
Described the second pre-differential amplifier circuit, dry for the common mode of induced electromotive force signal described in filteringDisturb signal, obtain the first sub-induced electromotive force signal;
Described the second bandwidth-limited circuit, for the high frequency of the first sub-induced electromotive force signal described in filteringInterfering signal, obtains the second sub-induced electromotive force signal;
Described the second Programmable Gain Amplifier Circuit, for carrying out described the second sub-induced electromotive force signalAmplify, obtain the 3rd sub-induced electromotive force signal;
Described the 2nd A/D change-over circuit, for being converted to second by described the 3rd sub-induced electromotive force signalData signal;
Described the second processor, for described the second data signal is multiplied by predetermined current proportionality coefficient,To the electric current of described transmission line of electricity to be detected.
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| CN201510981010.2A CN105588976B (en) | 2015-12-23 | 2015-12-23 | Voltage and current combined sensor and measure voltage ＆ current system |
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| CN201510981010.2A CN105588976B (en) | 2015-12-23 | 2015-12-23 | Voltage and current combined sensor and measure voltage ＆ current system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107884615A (en) * | 2017-12-13 | 2018-04-06 | 浙江天拓电气有限公司 | A kind of new-energy automobile drive system integrated synthesis tester |
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| CN201655532U (en) * | 2009-12-18 | 2010-11-24 | 南阳中祥电力电子有限公司 | Electronic current-voltage combination transformer |
| CN102156218A (en) * | 2011-03-17 | 2011-08-17 | 重庆大学 | Device and method for measuring voltage of noncontact charge induced high-voltage transmission line |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884615A (en) * | 2017-12-13 | 2018-04-06 | 浙江天拓电气有限公司 | A kind of new-energy automobile drive system integrated synthesis tester |
| CN107884615B (en) * | 2017-12-13 | 2023-11-14 | 湖南银河电气有限公司 | Integrated comprehensive tester for new energy automobile driving system |
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