CN201285699Y - Electronic mutual inductor apparatus - Google Patents
Electronic mutual inductor apparatus Download PDFInfo
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- CN201285699Y CN201285699Y CNU2008201869353U CN200820186935U CN201285699Y CN 201285699 Y CN201285699 Y CN 201285699Y CN U2008201869353 U CNU2008201869353 U CN U2008201869353U CN 200820186935 U CN200820186935 U CN 200820186935U CN 201285699 Y CN201285699 Y CN 201285699Y
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- collector
- combiner
- signal
- mutual inductor
- electronic mutual
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Abstract
An electronic mutual inductor device comprises a collector and a combiner device. A single collector (1) can receive three-way analog quantity inputs of a Rogowski coil (3), an LPCT low power consumption coil (4) and a voltage divider (6) and transmit the three-way analog quantity inputs to a combiner (2) through an optical fibre (7). The combiner (2) supplies power for the collector (1) through the optical fibre (7) and a CT power-taking coil (5) also supplies power for the collector (1). The combiner (2) receives the signal of the collector (1), and the signal is output through the Ethernet (9). The combiner (2) receives a synchronous signal through the input of a synchronous clock (8) and can receive an analog quantity input signal. The electronic mutual inductor device is mainly suitable for the transmission change of AC/DC high-voltage high-current in the voltage level of 110 kV to 500 kV and is provided for the corresponding device, such as protection, measurement, and the like through the optical fibre by means of a digital signal.
Description
One, affiliated technical field:
The utility model relates to a kind of new-style electronic instrument transformer combiner and collector device, can replace traditional electromagnetic transformer, is applied in the digital transformer substation electric current and voltage is sampled, analyzes, transmitted.
Two, background technology:
At present, traditional electromagnetic type current-voltage transformer is difficult to directly finish computer technology the current/voltage complete information is carried out the requirement of digitized processing, is difficult to the on-line monitoring of realizing that electrical network changes electrical parameter.Therefore hindered Automation of Electric Systems and developed to higher level, seeking a kind ofly can become pressing for of the efficient operation of power grid security with the matching used New type of current voltage transformer of digitalized network.
This device collector can be gathered the protective current signal by the Rogowski coil, and current signal is measured in the collection of LPCT low-power consumption coil, and capacitor voltage divider is gathered voltage signal.Getting energy coil or laser gets and can take into account the alternating current-direct current sampling for collector provides power supply.The separate unit combiner can receive and handle outside the digital signal from 8 collectors, can also handle voltage, the input of current analog amount that electromagnetic transformer provides, takes into account electronic mutual inductor and mixes application with traditional instrument transformer.The separate unit combiner has 2 Ethernet electricity/light 100base-Fx/10Base-FL data-interface, after the data processing that receives from collector, sends image data with the IEC61850 standard agreement.
Three, utility model content
At the problem that occurs in the prior art, the utility model provides a kind of electronic mutual inductor device, its technical scheme is: a kind of electronic mutual inductor device, comprise collector and combiner, wherein, single collector can receive the Rogowski coil, 3 tunnel analog quantitys input of LPCT low-power consumption coil and voltage divider, send to combiner by optical fiber, combiner is given the collector energy supply by optical fiber, CT gets and can also give the collector energy supply by coil simultaneously, and combiner receives the signal of collector, exports by Ethernet, combiner receives synchronizing signal by the synchronised clock input, and can receive the analog quantity input signal.
Above-mentioned electronic mutual inductor device, it is further characterized in that combiner can receive the signal of a plurality of collectors; Employing is got the duplicate supply energy-provision way of energy and laser energy supply with CT, gets and can choose iron based nano crystal material structure CT iron core by coil; Each sampled point synchronized sampling of each collector can be provided with the collector sample frequency.
Above-mentioned electronic mutual inductor device, it is further characterized in that, gathers the protective current signal by the Rogowski coil, and current signal is measured in the collection of LPCT low-power consumption coil, and capacitor voltage divider is gathered voltage signal; Adopt digital integration to Rogowski coil signal integration.
Above-mentioned electronic mutual inductor device, it is characterised in that further the separate unit combiner has two Ethernet electricity/light 100base-Fx/10Base-FL data-interface, after the data processing that receives from collector, sends sampled data with the IEC61850 standard agreement; The combiner device has increased by 16 road analog signals input interfaces; Collector adopts the Low-power Technology design.
The beneficial effects of the utility model:
The utility model electronic mutual inductor adopts the Optical Fiber Transmission data, and electrical insulation properties is good; The high-pressure side circuit adopts laser energy supply and coil to get the two energy-provision way of energy, guarantees the collector operate as normal; The protective current sampling obtains after using the Rogowski coil by digital integration, and dynamic range is big, and it is saturated to be difficult for generation, and raw material are saved in stable performance; Standard IEC 61850 agreements are used in output, realize that the data multiple terminals is shared, have good versatility and applicability; Increased the analog signals input interface, electromagnetic transformer sampling that can be compatible traditional; Collector adopts low power dissipation design and anti-EMC design, is applicable to works fine under various abominable external environment conditions.
Four, description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
1. collector 2. combiner 3. the Rogowski coil 4. LPCT low-power consumption coil 5. CT get can coil
6. voltage divider 7. optical fiber 8. synchronised clock import 9. Ethernet and export 10. analog quantity input
Five, embodiment
Below by specific embodiment the technical solution of the utility model is described further.
Occurring following several technical problems in the prior art needs to solve:
(1) high-pressure side collector energy supply method
Because Laser Power Devices are more stable, the energy supply of electronic mutual inductor at present, the main laser that adopts is sent to hot side by optical fiber with light energy from low potential side, by electrooptical device (photocell) light energy is converted to electric flux again, gives high-pressure side collector energy supply.But do not have real practice examining the useful life for Laser Power Devices, do not have effective convincingness for its persistent ability to work.
(2) synchronized sampling and sample frequency problem
Electronic mutual inductor is very strict to the synchronous requirement of each collector sampling instant, and general the employing realized each sampled data added-time calibration method, but this method causes data volume to increase, data processing complex, and markers is to problems such as time errors.
The sampled data of electronic mutual inductor is because sample frequency inconsistent (for example is adopted another employing of 80fr 200fr speed sampling), it is cumbersome to cause user data to handle, general employing interpolation method is sampled to compensate and is calculated, but interpolation method can cause data operation quantity to increase, and introduces problems such as interfering data.
(3) Rogowski coil signal integration problem
The protective current sampled signal of electronic mutual inductor is to obtain by the Rogowski coil; primary current has obtained and the proportional secondary voltage signal of the differential of primary current by the Rogowski coil, need carry out integration to this secondary voltage signal and be reduced into and the proportional signal of primary current.Generally all adopt the method for analog circuit integration to handle, but particularly temperature is big especially to the integrating capacitor influence of analog circuit for external environment condition, causes precision and differs stable inadequately and accurate.
(4) data transmission problems
Combiner sends the communication protocol standard of sampled data foundation.
(5) compatibility issue in traditional acquisition system
Compatibility to traditional electromagnetic current transducer.
(6) low power dissipation design of collector
The power of laser powered sensor is limited, need do low power dissipation design to collector.
(7) the sampling function of separate unit collector
General single collector is only finished voltage, or the current sample function, has any different mutually to exchanging to gather with the direct current collection again.
The concrete scheme of the invention embodiment is:
A kind of electronic mutual inductor is gathered the protective current signal by the Rogowski coil, and current signal is measured in the collection of LPCT low-power consumption coil, and capacitor voltage divider is gathered voltage signal.Getting energy coil or laser gets and can take into account the alternating current-direct current sampling for collector provides power supply.The separate unit combiner can receive and handle outside the digital signal from 8 collectors, can also handle voltage, the input of current analog amount that electromagnetic transformer provides, takes into account electronic mutual inductor and mixes application with traditional instrument transformer.The separate unit combiner has two Ethernet electricity/light 100base-Fx/10Base-FL data-interface, after the data processing that receives from collector, sends with the IEC61850 standard agreement.
Above-mentioned electronic mutual inductor adopts the duplicate supply energy-provision way of getting energy and laser energy supply with CT; Each sampled point synchronized sampling of each collector can be provided with the collector sample frequency; Adopt digital integration to Rogowski coil signal integration; Send sampled data with standard IEC 61850 agreements; Increased the analog signals input interface; Collector adopts the Low-power Technology design.
The electronic mutual inductor of the invention comprises collector and combiner device, mainly is applicable to the progress of disease of 110kV～500kV electric pressure alternating current-direct current high-voltage large current, and offers related devices such as protection, measurement by optical fiber with digital signal form.Combiner also has the analog quantity input interface, can convert the semaphore from other analog instrument transformer to digital signal, with 100base-Fx/10Base-FL interface dateout.Send agreement and follow the defined analog quantity sampled value of IEC 61850 standards data-interface standard.
As shown in Figure 1, be the combiner of the invention embodiment and the system configuration schematic diagram of collector work.
(1) high-pressure side collector energy supply method
The utility model adopt with CT from the bus power taking can and the duplicate supply mode of laser energy supply.In the rated current excursion of 5～1500A, can export to the collector power supply by coil acquisition burning voltage by getting.When being in little current status such as zero load when bus current, or be in current state when bus, cut off the CT energy supply, use the Laser Power Devices energy supply above rated current.
Get and to choose iron based nano crystal material structure CT iron core by coil, and further investigate at aspects such as overvoltage protection, energy leadage circuit, EMC Design, can provide and stablize the 5V power supply, the ripple of each road power supply is all less than 20mV, the gross power that provides is 1W, has guaranteed the operate as normal of high-pressure side circuit.
(2) synchronized sampling and sample frequency problem
The utility model adopts the mode by each sampled point synchronization point of each collector of the unified control of combiner, has perfectly handled this thorny problem.It is synchronous that combiner can receive outside pulse per second (PPS) synchronizing signal, also can send the pulse per second (PPS) synchronizing signal to the outside.
The mode that the utility model adopts sample frequency to be provided with addresses this problem, and the user can be provided with the collector sample frequency by combiner, reaches the purpose with other electronic mutual inductor data compatibilities.
(3) Rogowski coil signal integration problem
The utility model adopts the method for digital integration that the secondary voltage signal is carried out integration, has thoroughly eliminated the influence of ambient temperature to integral result.
(4) data transmission problems
The utility model adopts standard IEC 61850 agreements to transmit sampled data, has stronger applicability, extensibility and perspective.
(5) compatibility issue in traditional acquisition system
Because at present a lot of samples to electric current and voltage for the distribution place, mainly also be to use traditional electromagnetic current transducer, the utility model fully takes into account this characteristics, the combiner device has increased by 16 road analog signals input interfaces, can sample, handle and transmit 16 tunnel voltage or current signal.
(6) low power dissipation design of collector
Collector of the present utility model adopts the Low-power Technology design, and all the power consumption power consumptions are lower than 50mW, are beneficial to its working long hours under adverse circumstances such as high low temperature, to Laser Power Devices and get can coil the relatively lower reliable realization that is beneficial to system of power requirement.
(7) the sampling function of collector
The sampling that single collector can be finished voltage simultaneously, measure electric current and protective current three circuit-switched data, compatible again to the signals collecting of interchange with direct current.
Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection range of the present utility model should be defined with the application's claim protection range is as the criterion.
Claims (7)
1. electronic mutual inductor device, comprise collector and combiner, it is characterized in that, single collector (1) can receive Rogowski coil (3), 3 tunnel analog quantitys input of LPCT low-power consumption coil (4) and voltage divider (6), send to combiner (2) by optical fiber (7), combiner (2) is given collector (1) energy supply by optical fiber (7), CT gets and can also give collector (1) energy supply by coil (5) simultaneously, combiner (2) receives the signal of collector (1), export by Ethernet (9), combiner (2) receives synchronizing signal by synchronised clock (8) input, and can receive the analog quantity input signal.
2. electronic mutual inductor device according to claim 1 is characterized in that combiner can receive the signal of a plurality of collectors.
3. electronic mutual inductor device according to claim 1 is characterized in that, adopts the duplicate supply energy-provision way of getting energy and laser energy supply with CT, gets and can choose iron based nano crystal material structure CT iron core by coil.
4. electronic mutual inductor device according to claim 1 is characterized in that, each sampled point synchronized sampling of each collector can be provided with the collector sample frequency.
5. electronic mutual inductor device according to claim 1 is characterized in that, gathers the protective current signal by the Rogowski coil, and current signal is measured in the collection of LPCT low-power consumption coil, and capacitor voltage divider is gathered voltage signal.
6. electronic mutual inductor device according to claim 1 is characterized in that, adopts digital integration to Rogowski coil signal integration.
7. electronic mutual inductor device according to claim 1, it is characterized in that, the separate unit combiner has two Ethernet electricity/light 100base-Fx/10Base-FL data-interface, after the data processing that receives from collector, sends sampled data with the IEC61850 standard agreement; The combiner device has increased by 16 road analog signals input interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201869353U CN201285699Y (en) | 2008-09-12 | 2008-09-12 | Electronic mutual inductor apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201869353U CN201285699Y (en) | 2008-09-12 | 2008-09-12 | Electronic mutual inductor apparatus |
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| CN201285699Y true CN201285699Y (en) | 2009-08-05 |
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| CNU2008201869353U Expired - Fee Related CN201285699Y (en) | 2008-09-12 | 2008-09-12 | Electronic mutual inductor apparatus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149485A (en) * | 2013-03-13 | 2013-06-12 | 绍兴电力局 | Transient-state waveform analysis system based on electronic mutual inductor |
| CN103487679A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | AIS electronic transformer testing system and testing method thereof |
| CN104236625A (en) * | 2014-08-25 | 2014-12-24 | 国家电网公司 | Integrated monitoring sensor for high-voltage cable operation parameter |
| CN105116213A (en) * | 2015-09-30 | 2015-12-02 | 三峡大学 | On line measuring device for voltage and current differential signals |
| CN105826000A (en) * | 2016-05-17 | 2016-08-03 | 江苏靖江互感器厂有限公司 | Straight-through electron type current transformer for intelligent C-GIS |
| CN107870268A (en) * | 2016-09-26 | 2018-04-03 | 南京南瑞继保电气有限公司 | A kind of centralized sampling system |
| CN113759158A (en) * | 2021-07-26 | 2021-12-07 | 国家电网有限公司 | Mutual inductor for multi-node station domain information fusion and data acquisition method |
-
2008
- 2008-09-12 CN CNU2008201869353U patent/CN201285699Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149485A (en) * | 2013-03-13 | 2013-06-12 | 绍兴电力局 | Transient-state waveform analysis system based on electronic mutual inductor |
| CN103149485B (en) * | 2013-03-13 | 2015-09-30 | 绍兴电力局 | A kind of transient-wave analytic system based on electronic mutual inductor |
| CN103487679A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | AIS electronic transformer testing system and testing method thereof |
| CN103487679B (en) * | 2013-09-09 | 2015-08-05 | 国家电网公司 | A kind of AIS electric mutual inductor test macro and method thereof |
| CN104236625A (en) * | 2014-08-25 | 2014-12-24 | 国家电网公司 | Integrated monitoring sensor for high-voltage cable operation parameter |
| CN105116213A (en) * | 2015-09-30 | 2015-12-02 | 三峡大学 | On line measuring device for voltage and current differential signals |
| CN105826000A (en) * | 2016-05-17 | 2016-08-03 | 江苏靖江互感器厂有限公司 | Straight-through electron type current transformer for intelligent C-GIS |
| CN107870268A (en) * | 2016-09-26 | 2018-04-03 | 南京南瑞继保电气有限公司 | A kind of centralized sampling system |
| CN113759158A (en) * | 2021-07-26 | 2021-12-07 | 国家电网有限公司 | Mutual inductor for multi-node station domain information fusion and data acquisition method |
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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 |
Granted publication date: 20090805 Termination date: 20160912 |
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| CF01 | Termination of patent right due to non-payment of annual fee |