CN204832314U - Measurement device for electric wire netting primary current - Google Patents
Measurement device for electric wire netting primary current Download PDFInfo
- Publication number
- CN204832314U CN204832314U CN201520571078.9U CN201520571078U CN204832314U CN 204832314 U CN204832314 U CN 204832314U CN 201520571078 U CN201520571078 U CN 201520571078U CN 204832314 U CN204832314 U CN 204832314U
- Authority
- CN
- China
- Prior art keywords
- resistance
- electrical network
- primary current
- voltage
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The embodiment of the utility model provides a measurement device for electric wire netting primary current, including concatenate the electric wire netting once incline the return circuit resistance and meet voltmeter and the electric current calculating unit at the resistance both ends, wherein the voltmeter is used for measuring the magnitude of voltage U of resistance, electric current calculating unit is used for obtaining electric wire netting primary current value according to I=UR, and wherein I is for electric wire netting primary current value, and R does the resistance value of resistance. Through the utility model discloses a current transformer's use has been avoided to the scheme, and then the cost is reduced, has improved system's reliability of operation, stability and life.
Description
Technical field
The utility model belongs to power domain, particularly relates to a kind of measurement mechanism of electrical network primary current.
Background technology
The primary current of high-voltage fence is all obtain in secondary side measurement through current transformer in the world at present, specifically as shown in Figure 1, current transformer winding serial connection is as high pressure primary circuit, be connected in series in secondary winding in current transformer into reometer, the current value that reometer records by the current calculation unit in Control Room is multiplied by the no-load voltage ratio I of current transformer
1=I
2(N
2/ N
1) be high pressure primary current.
Along with the rising of line voltage grade, also more and more higher to the insulating requirements of current transformer, manufacturing cost and the operation expense of current transformer are also more and more higher.
Summary of the invention
The purpose of this utility model is the measurement mechanism providing a kind of electrical network primary current, and to solve, to measure at secondary side the cost that the method for electric current brings by current transformer in prior art high, the problem that stability is low.
For achieving the above object,
The utility model embodiment also provides a kind of measurement mechanism of electrical network primary current on the other hand, comprising: be serially connected in the resistance in electrical network primary side loop, be attempted by voltage table and the current calculation unit at resistance two ends;
Wherein said voltage table is for measuring the magnitude of voltage U of described resistance;
Described current calculation unit is used for obtaining electrical network primary current value according to I=U/R, and wherein I is electrical network primary current value, and R is the resistance value of described resistance.
Preferably, described resistance is measuring resistance.
Preferably, described measurement mechanism also comprises a controller be connected with described voltage table by fiber optic cables;
Described controller obtains electrical network primary current value according to I=U/R.
Preferably, described measuring resistance is four terminals, and described voltage table is attempted by two voltage terminal places of described measuring resistance.
Preferably, described electrical network is high direct voltage electrical network or ac high-voltage electrical network.
The utility model is by measuring the magnitude of voltage of the resistance in electrical network primary circuit, and obtain primary current value according to this magnitude of voltage and resistance value, carried out the mode measured by current transformer compared to existing technology, the utility model only needs a resistance and voltage measuring apparatus as voltage table, thus reduce cost, improve stability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the measuring principle of the utility model prior art;
Fig. 2 is the utility model embodiment method flow diagram;
Fig. 3 is the utility model examples measure principle schematic.
Embodiment
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, 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 embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
The utility model embodiment provides a kind of measuring method of electrical network primary current, and as shown in Figure 2, the method comprises the steps:
S11, measure the magnitude of voltage U being serially connected in resistance in electrical network primary side loop.
S12, obtain electrical network primary current value according to I=U/R, wherein I is electrical network primary current value, and R is the resistance value of described resistance.
Fig. 3 is measuring principle figure of the present utility model, as can be seen from the figure, is serially connected with a resistance in electrical network primary circuit, and the two ends of resistance are also connected to a voltage table.The magnitude of voltage at resistance two ends can be recorded by voltage table, and then primary current value can be obtained according to formula I=U/R.
It should be noted that, above-mentioned resistance can be a pure resistance, also can be components and parts with resistance characteristic.Owing to needing to use resistance value in measuring process, thus the resistance value of this pure resistance or components and parts should possess good measurement or be the feature of given value.
In a specific embodiment, can be connected in series into a measuring resistance in electrical network primary circuit, to improve the degree of accuracy of the current value finally recorded.
In the utility model, for carrying out step S12, need the magnitude of voltage recorded to transfer to a current calculation unit or a data presentation device.
As transferred to a current calculation unit, then this current calculation unit needs to know resistance value simultaneously, to calculate current value by formula I=U/R.This resistance value can be that user manually inputs to current calculation unit, transfers to this current calculation unit after also can being obtained by a resistivity-measuring devices measurement.This current calculation unit can be a remote calculator etc., and the magnitude of voltage recorded can be transferred to this current calculation unit by fiber optic cables by voltage table.Certainly, carry out data management for the convenience of the user, this current calculation unit can have the functions such as display, analysis, control, monitoring simultaneously.
As transferred to a data presentation device, then user can obtain current value according to this magnitude of voltage and known resistance value manual calculations.Same, this resistance value can be the determined value of a mark resistance, transfers to data presentation device and check for user after also can being obtained by a resistivity-measuring devices measurement.
Be below an embody rule embodiment:
As shown in Figure 3, in direct current high tension transmission circuit, be connected in series the measuring resistance into one or four terminals, and connect a voltage table at its two voltage terminal place, the secondary of voltage table is exported and is connected with the host computer in Control Room by fiber optic cables, preferably, described measuring resistance is four terminals, and described voltage table is attempted by two voltage terminal places of described measuring resistance.Store measuring resistance value in this host computer, after it obtains the magnitude of voltage of voltage table transmission, current value can be obtained according to magnitude of voltage and measuring resistance value.
It should be noted that, above-mentioned measuring method is applicable to high direct voltage electrical network or ac high-voltage electrical network.
The utility model also discloses the measurement mechanism of an electrical network primary current simultaneously, and it comprises the resistance being serially connected in electrical network primary side loop, the voltage table being attempted by resistance two ends and current calculation unit; Wherein said voltage table is for measuring the magnitude of voltage U of described resistance; Described current calculation unit is used for obtaining electrical network primary current value according to I=U/R, and wherein I is electrical network primary current value, and R is the resistance value of described resistance.
Preferably, described resistance is measuring resistance.
Preferably, described measurement mechanism also comprises a controller be connected with described voltage table by fiber optic cables;
Described controller obtains electrical network primary current value according to I=U/R.
Preferably, described measuring resistance is four terminals, and described voltage table is attempted by two voltage terminal places of described measuring resistance.
Preferably, described electrical network is high direct voltage electrical network or ac high-voltage electrical network.
The utility model apparatus and method embodiment is corresponding, and relevant portion can reference mutually.
Although depict the application by embodiment, those of ordinary skill in the art know, the application has many distortion and change and do not depart from the spirit of the application, and the claim appended by wishing comprises these distortion and change and do not depart from the spirit of the application.
Claims (5)
1. a measurement mechanism for electrical network primary current, is characterized in that, described measurement mechanism comprises: be serially connected in the resistance in electrical network primary side loop, be attempted by voltage table and the current calculation unit at resistance two ends;
Wherein said voltage table is for measuring the magnitude of voltage U of described resistance;
Described current calculation unit is used for obtaining electrical network primary current value according to I=U/R, and wherein I is electrical network primary current value, and R is the resistance value of described resistance.
2. the measurement mechanism of electrical network primary current as claimed in claim 1, it is characterized in that, described resistance is measuring resistance.
3. the measurement mechanism of electrical network primary current as claimed in claim 1 or 2, it is characterized in that, described measurement mechanism also comprises a controller be connected with described voltage table by fiber optic cables;
Described controller obtains electrical network primary current value according to I=U/R.
4. the measurement mechanism of electrical network primary current as claimed in claim 2, it is characterized in that, described measuring resistance is four terminals, and described voltage table is attempted by two voltage terminal places of described measuring resistance.
5. the measurement mechanism of electrical network primary current as claimed in claim 4, it is characterized in that, described electrical network is high direct voltage electrical network or ac high-voltage electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520571078.9U CN204832314U (en) | 2015-07-31 | 2015-07-31 | Measurement device for electric wire netting primary current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520571078.9U CN204832314U (en) | 2015-07-31 | 2015-07-31 | Measurement device for electric wire netting primary current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204832314U true CN204832314U (en) | 2015-12-02 |
Family
ID=54689900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520571078.9U Expired - Fee Related CN204832314U (en) | 2015-07-31 | 2015-07-31 | Measurement device for electric wire netting primary current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204832314U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991106A (en) * | 2015-07-31 | 2015-10-21 | 苏州华电电气股份有限公司 | Measurement method of power grid primary current and device thereof |
| CN106180159A (en) * | 2016-07-07 | 2016-12-07 | 北京大学 | A kind of contaminated soil Electroremediation system power real-time acquisition device based on data collecting card |
| CN107817373A (en) * | 2016-09-14 | 2018-03-20 | 台达电子工业股份有限公司 | Current sensing means and its detection method |
-
2015
- 2015-07-31 CN CN201520571078.9U patent/CN204832314U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991106A (en) * | 2015-07-31 | 2015-10-21 | 苏州华电电气股份有限公司 | Measurement method of power grid primary current and device thereof |
| CN106180159A (en) * | 2016-07-07 | 2016-12-07 | 北京大学 | A kind of contaminated soil Electroremediation system power real-time acquisition device based on data collecting card |
| CN107817373A (en) * | 2016-09-14 | 2018-03-20 | 台达电子工业股份有限公司 | Current sensing means and its detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103604998A (en) | Method for measuring electric conduction loop resistance of circuit breaker | |
| CN204832314U (en) | Measurement device for electric wire netting primary current | |
| CN204405731U (en) | The clamp on amperemeter that a kind of linearity is good | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN106771632A (en) | Multi-channel DC resistance meter | |
| CN106597148A (en) | Residual voltage monitoring based state monitoring system and method for lightning arrester without serial gap | |
| CN202693622U (en) | Power transformer test connecting device | |
| CN104007354B (en) | The total group test circuit and method of 10kV Zinc-Oxide Arresters and cable | |
| CN104502738A (en) | Transformer loss detection device | |
| CN104991106A (en) | Measurement method of power grid primary current and device thereof | |
| CN204989289U (en) | Measurement device for electric wire netting primary current | |
| CN204789832U (en) | CVT high -voltage testing's line changing device and CVT high -voltage testing device | |
| CN103048533A (en) | Switch cabinet online monitor easy in information acquisition | |
| CN205450243U (en) | Fault indicator coil tester | |
| CN104991107A (en) | Measurement device of power grid primary current and method thereof | |
| CN204789785U (en) | Portable intelligent substation relay protection testing arrangement | |
| CN106953410A (en) | A kind of low-voltage power network monitoring terminal and monitoring system | |
| CN104360299A (en) | On-site wireless inspection device and method for capacitive type device on-line monitoring system | |
| CN212229131U (en) | Direct current system test device | |
| CN111537797B (en) | System and method for measuring insulation resistance of transformer substation without disassembling lead | |
| CN204925247U (en) | Portable high tension cable cross -bonding system nuclear phase meter | |
| CN210376518U (en) | High-precision contact resistance tester capable of continuously measuring | |
| CN204086445U (en) | A kind of wire breakage detection device for cables | |
| CN206863180U (en) | A kind of generator manually wound insulation reversal connection ray detection device in high potential measurement | |
| CN202372564U (en) | Online monitoring device of switch cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20190731 |