CN201498356U - Electronic combined power mutual inductor - Google Patents
Electronic combined power mutual inductor Download PDFInfo
- Publication number
- CN201498356U CN201498356U CN2009202284197U CN200920228419U CN201498356U CN 201498356 U CN201498356 U CN 201498356U CN 2009202284197 U CN2009202284197 U CN 2009202284197U CN 200920228419 U CN200920228419 U CN 200920228419U CN 201498356 U CN201498356 U CN 201498356U
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- rogowski coil
- voltage divider
- voltage
- current carrying
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Abstract
The utility model relates to an electronic combined power mutual inductor, which is composed of a current carrying bus bar, a measuring circuit, a voltage divider, a conducting bar, a cylinder, a Rogowski coil, a shell, a signal wire and an output terminal. The current carrying bus bar is installed on the upper portion of the shell, and the Rogowski coil and the conducting bar are connected with the current carrying bus bar. The cylinder is sleeved together with the conducting bar, the measuring circuit is connected with the voltage divider and the Rogowski coil, the voltage divider and the Rogowski coil are connected with the output terminal through the signal wire, and the measuring circuit adopts a voltage measuring unit and a current measuring unit. The electronic combined power mutual inductor has the advantages that an insulation structure is simple, the volume is small, the weight is light, no oil exists, environment is protected, the mutual inductor is safe and does not need daily maintenance, the current and the voltage can be measured in a big current and voltage change range, a high voltage loop and a secondary low voltage loop are completely separated electrically, electronic signal output can satisfy the demands of secondary demands such as metering, protection and the like which are matched with the electronic signals, which is beneficial for realizing digitization and intelligence of transformer stations.
Description
(1) technical field: the utility model relates to a kind of power equipment, particularly a kind of electronic type combination of power instrument transformer, it is mainly used in the electric power system of outdoor 10kV, 35kV grade, can with the supporting use of circuit breaker.With various protection measurement mechanisms, the supporting use of electronic electric energy meter meter, realize multi-functionals such as metering, measurement, control, protection and transfer of data simultaneously.Accurately provide and primary current, the proportional little electric current of voltage, small voltage signal for the electronic type electric energy metering control instrument; use for metering, measurement; also can when short trouble appears in electric power system, provide signal, guarantee its precision maneuver to protection measurement mechanisms such as digital relays.
(2) background technology: at present, electric power system adopts traditional electromagnetic current transducer, voltage transformer and the capacitance type potential transformer realization measurement to voltage, current signal more.Electromagnetic transformer is based on electromagnetic induction principle work, and electromagnetic transformer is updated from core material, manufacture craft, and to the various indemnifying measures of taking for the accuracy that improves measurement, electromagnetic potential transformer has developed into the quite ripe stage.Electromagnetic transformer has in the range of linearity accuracy of measurement height, manufacturing process maturation, test verification standard, have national standard can according to etc. advantage, at the long time endoadaptation power system measuring requirement.But electromagnetic transformer is subjected to the restriction of its sensor mechanism, and some performance still can't be satisfactory, and the main problem that exists is as follows: 1) insulation system complexity, volume heaviness, cost height; 2) the current transformer linearity is low, and is saturated easily when short circuit, and static and dynamically accurate scope is little; 3) ferro resonance may appear in voltage transformer, damage equipment, and secondary measure can not short circuit; Current transformer magnetic saturation under very big short circuit current, secondary is measured and can not be opened a way; 4) cable that causes the second protection control appliance by electric current, voltage transformer is the important channel of electromagnetic interference; 5) adopt oil-impregnated paper insulation inflammable, explosive dangerous; 6. along with the development of Microcomputer Protection technology and modern surveying device; protective relaying device and secondary are measured and automatics does not need high-power driving; the output signal of electromagnetic transformer can not directly link to each other with microcomputer, is difficult to adapt to the trend of Automation of Electric Systems, digital development.
(3) summary of the invention: the purpose of this utility model is, improves at the deficiency that above-mentioned prior art exists, and proposes and design a kind of electronic type combination of power instrument transformer.
Technical solution of the present utility model is, adopt current carrying bus row, housing, Rogowski coil, it is characterized in that, adopted measuring circuit, voltage divider, contact rod, cylinder, Rogowski coil, holding wire, lead-out terminal, current carrying bus row is installed in housing top, in housing, Rogowski coil and current carrying bus deploying connect, current carrying bus row be connected with contact rod, and cylinder is sleeved on contact rod, and measuring circuit and voltage divider and Rogowski coil are joined and connected; Voltage divider connects by holding wire and lead-out terminal, and the Rogowski coil connects by holding wire and lead-out terminal, and measuring circuit has adopted voltage measurement unit and current measuring unit.
It is characterized in that voltage measurement unit and current measuring unit adopt epoxide resin vacuum to be cast into one.
It is characterized in that voltage divider adopts capacitor voltage divider.
It is characterized in that voltage divider is to adopt the cylinder made from insulating material be with on contact rod, posts double-deck flexible PCB in the cylinder outside again and constitutes.
It is characterized in that current carrying bus row connected with vertical mutually joining of contact rod.
It is characterized in that the Rogowski coil casts on the current carrying bus row.
It is characterized in that the Rogowski coil is provided with signal processing and signal amplification circuit.
It is characterized in that housing and centralized control room are joined and connected.
It is characterized in that, adopt optical fiber to join between housing and the centralized control room and connect.
It is characterized in that, the indoor merge cells that is equipped with of centralized control, merge cells connects by the lead-out terminal on optical fiber and the housing.
With comparing of existing similar products, the innovation of product structure of the present utility model is:
One, adopt printed-board technology to make the Rogowski coil, to overcome traditional Rogowski coil shortcoming.
Common Rogowski coil is difficult to accomplish the even coiling of coil, this common Rogowski coil (Luo-coil) has the shortcoming that layer capacitance increases error, cause its parameter consistency in industrial production to be difficult to be guaranteed, thus the accuracy when influencing it and measuring electric current.The utility model overcomes the above problems by printed circuit board (PCB) (pcb board) technology of adopting process maturation.
In addition, design needed Rogowski coil (Luo-coil) circuit diagram, then printed conductor is evenly arranged on the printed circuit board (PCB) by design of electronic circuits software (Protel).The numeral process technology can guarantee that the sectional area of wire turn equates from technology.The coil of producing has so not only overcome the shortcoming of the Rogowski coil (Luo-coil) of traditional type, and sensitivity, certainty of measurement and stability all are better than the common coil by the copper cash coiling.The Rogowski coil that adopts the printed circuit board (PCB) process technology to make has overcome the shortcoming of the Rogowski coil of traditional type, have wire turn, sectional area is even, manufacture craft is simple, is suitable for mass production, the dispersed characteristics such as little of parameter, and sensitivity, certainty of measurement are better.It can keep the good linearity in very wide frequency band range.
Two, the capacitor voltage divider that adopts coaxial configuration is as voltage divider, its voltage ratio reliable and stable.
General capacitor voltage divider complex structure, volume are bigger, must demarcate again through dismounting or after reinstalling, and use very inconvenient.Adopt the capacitor voltage divider of coaxial configuration, its inner/outer tube is as the height pressure arm capacitor plate of voltage divider, thus reach simple in structure and capacitance relatively stable, guaranteed the reliable and stable of voltage ratio.Compare with general capacitor voltage divider, the coaxial capacitance voltage divider has the main electric field that does not influence in the transmission line; Do not influence the main ripple transmission in the transmission line, undistorted tested waveform; Transmission line inner/outer tube relative position is fixed, and has guaranteed that the voltage divider capacitance is constant, does not need after system's dismounting to demarcate again.
The utility model has the advantages that: 1) do not have unshakable in one's determination, insulation wet goods, insulation system is simple, volume is little, in light weight; 2) owing to do not contain iron core, there are not magnetic saturation and ferro resonance problem, can in very big electric current and change in voltage scope, measure electric current, voltage with high speed motion, accurate, jamproof broad band performance; 3) high voltage circuit and secondary low-voltage loop isolate on electric fully; 4) dry type is casting insulated, does not have oil, environmental protection, safely, exempt from regular maintenance; 5) electronic signal output can be satisfied the demand of secondary devices such as being mated the metering that makes, protection simultaneously, helps realizing the digitlization and the intellectuality of transformer station.
(4) description of drawings:
Fig. 1, basic structure schematic diagram of the present utility model;
The structural representation of Fig. 2, embodiment of the present utility model two.
(5) embodiment:
Below, in conjunction with the accompanying drawings embodiment of the present utility model is further described.
As shown in Figure 1, the embodiment one that the utility model provides adopts current carrying bus row 1, measuring circuit 2, voltage divider, contact rod 3, cylinder 4, Rogowski coil 6, housing 7, holding wire 8,9, lead-out terminal 10 to form.In housing 7, current carrying bus row 1 is installed in housing 7 tops, and Rogowski coil 6 is joined with current carrying bus row 1 and connected, and current carrying bus row 1 is connected cylinder 4 employing insulating material making with contact rod 3.Cylinder 4 is sleeved on contact rod 3, and measuring circuit 2 is joined with voltage divider and Rogowski coil 6 and connected; Measuring circuit 2 has adopted voltage measurement unit and current measuring unit.Voltage measurement unit and current measuring unit adopt epoxide resin vacuum to be cast into one.Voltage measurement unit is electrically connected with voltage divider.Current measuring unit is electrically connected with Rogowski coil 6.Voltage divider connects by holding wire 9 and lead-out terminal, and Rogowski coil 6 connects by holding wire 8 and lead-out terminal 10.
Voltage divider adopts capacitor voltage divider.The concrete structure of voltage divider is to adopt the cylinder made from insulating material 4 be with on contact rod 3, posts double-deck flexible PCB 5 again in cylinder 4 outsides and constitutes.Current carrying bus row 1 connected with vertical mutually joining of contact rod 3.Rogowski coil 6 casts on the current carrying bus row 1.Rogowski coil 6 is provided with signal processing and signal amplification circuit.Rogowski coil 6 adopts printed-board technology (PCB) to make.
The utility model adopts the capacitance partial pressure measuring voltage, because current carrying bus row 1 is vertical mutually with contact rod 3, can increase creepage distance.Flexible PCB 5 is provided with signal processing and signal amplification circuit, can improve the signal to noise ratio of signal like this, pre-amplification voltage signal.Adopt Rogowski coil 6 to measure electric current, the voltage signal of output and the current signal of output are delivered to lead-out terminal 10 by holding wire 9,8 respectively by holding wire, send from lead-out terminal 10 again.
As shown in Figure 2, embodiment two of the present utility model adopts current carrying bus row 1, measuring circuit 2, voltage-dividing capacitor, contact rod 3, cylinder 4, Rogowski coil 6 housings 7, holding wire 8,9, lead-out terminal 10, optical fiber 11, merge cells 12, centralized control room 13 to form.Current carrying bus is arranged 1 housing, 7 tops, and in housing 7, current carrying bus row 1 is installed in housing 7 tops, and Rogowski coil 6 is joined with current carrying bus row 1 and connected, and current carrying bus row 1 is connected cylinder 4 employing insulating material making with contact rod 3.Cylinder 4 is sleeved on contact rod 3, and measuring circuit 2 is joined with voltage divider and Rogowski coil 6 and connected; Measuring circuit 2 has adopted voltage measurement unit and current measuring unit.Voltage measurement unit and current measuring unit adopt epoxide resin vacuum to be cast into one.Voltage measurement unit is electrically connected with voltage divider.Current measuring unit is electrically connected with Rogowski coil 6.Voltage divider is connected with Rogowski coil 6.Voltage divider is to adopt the cylinder made from insulating material 4 be with on contact rod 3, posts double-deck flexible PCB 5 again in cylinder 4 outsides and constitutes.Current carrying bus row 1 connected with vertical mutually joining of contact rod 3.Rogowski coil 6 casts on the current carrying bus row 1.Rogowski coil 6 is provided with signal processing and signal amplification circuit.Rogowski coil 6 adopts printed-board technology (PCB) to make.
Embodiment two joins to connect centralized control room 13 on the basis of embodiment one.Adopting optical fiber 11 to join between housing 7 and the centralized control room 13 connects.Centralized control room 13 is furnished with merge cells 12, and merge cells 12 is installed in the centralized control room 13, and merge cells 12 connects by the lead-out terminal 10 on optical fiber 11 and the housing 7.
Adopt the capacitance partial pressure measuring voltage.Because current carrying bus row 1 is vertical mutually with contact rod 3, can increase creepage distance.Flexible PCB 5 is provided with signal processing and signal amplification circuit, can improve the signal to noise ratio of signal like this, pre-amplification voltage signal.Adopt Rogowski coil 6 to measure electric current, the voltage signal of output and the current signal of output are delivered to lead-out terminal 10 by holding wire 9,8 respectively, deliver to the merge cells 12 of centralized control room 13 again from lead-out terminal 10, in merge cells 12,, can be resent to secondary device through after the data processing.
Technical indicator according to the product of the utility model example one and embodiment two processing and manufacturings is as follows:
Rated voltage: 10kV, 35kV;
Rated primary current: 50A-2500A;
Accuracy: 0.2 grade, 5P25;
The protection interface is at 20 times of following transient errors of overcurrent multiple about 5%;
Digital data rates: 20fr, 48fr, 80fr (fr=50Hz or 60Hz);
Claims (10)
1. electronic type combination of power instrument transformer, employing current carrying bus row, housing, the Rogowski coil, it is characterized in that, adopted measuring circuit (2), voltage divider, contact rod (3), cylinder (4), Rogowski coil (6), holding wire (8), (9), lead-out terminal (10), current carrying bus row (1) is installed in housing (7) top, in housing (7), Rogowski coil (6) is joined with current carrying bus row (1) and is connected, current carrying bus row (1) is connected with contact rod (3), cylinder (4) is sleeved on contact rod (3), and measuring circuit (2) is joined with voltage divider and Rogowski coil (6) and connected; Voltage divider connects by holding wire (9) and lead-out terminal (10) and Rogowski coil (6) connects by holding wire (8) and lead-out terminal (10), and measuring circuit (2) has adopted voltage measurement unit and current measuring unit.
2. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, voltage measurement unit and current measuring unit adopt epoxide resin vacuum to be cast into one.
3. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, voltage divider adopts capacitor voltage divider.
4. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, voltage divider is to adopt the cylinder made from insulating material (4) be with on contact rod (3), posts double-deck flexible PCB (5) in cylinder (4) outside again and constitutes.
5. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, current carrying bus row (1) connected with vertical mutually joining of contact rod (3).
6. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, Rogowski coil (6) casts on the current carrying bus row (1).
7. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that Rogowski coil (6) is provided with signal processing and signal amplification circuit.
8. a kind of electronic type combination of power instrument transformer according to claim 1 is characterized in that, housing (7) is joined with centralized control room (13) and connected.
9. a kind of electronic type combination of power instrument transformer according to claim 9 is characterized in that, adopts optical fiber (11) to join between housing (7) and the centralized control room (13) and connects.
10. according to Claim 8 or 9 described a kind of electronic type combination of power instrument transformers, it is characterized in that, merge cells (12) is installed in the centralized control room (13), merge cells (12) connects by optical fiber (11) and lead-out terminal (10) on the housing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202284197U CN201498356U (en) | 2009-09-24 | 2009-09-24 | Electronic combined power mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202284197U CN201498356U (en) | 2009-09-24 | 2009-09-24 | Electronic combined power mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201498356U true CN201498356U (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202284197U Expired - Fee Related CN201498356U (en) | 2009-09-24 | 2009-09-24 | Electronic combined power mutual inductor |
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| Country | Link |
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| CN (1) | CN201498356U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018529A (en) * | 2012-12-11 | 2013-04-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN103901246A (en) * | 2014-03-25 | 2014-07-02 | 国家电网公司 | Electronic transformer device |
| CN111986966A (en) * | 2020-08-13 | 2020-11-24 | 安徽明玑电力设备有限公司 | High-voltage current-limiting fuse |
-
2009
- 2009-09-24 CN CN2009202284197U patent/CN201498356U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018529A (en) * | 2012-12-11 | 2013-04-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN103018529B (en) * | 2012-12-11 | 2015-06-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN103901246A (en) * | 2014-03-25 | 2014-07-02 | 国家电网公司 | Electronic transformer device |
| CN111986966A (en) * | 2020-08-13 | 2020-11-24 | 安徽明玑电力设备有限公司 | High-voltage current-limiting fuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20120924 |