CN203339644U - Signal transmission device used among high-low voltage equipment of fault current limiter - Google Patents
Signal transmission device used among high-low voltage equipment of fault current limiter Download PDFInfo
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- CN203339644U CN203339644U CN2013203686470U CN201320368647U CN203339644U CN 203339644 U CN203339644 U CN 203339644U CN 2013203686470 U CN2013203686470 U CN 2013203686470U CN 201320368647 U CN201320368647 U CN 201320368647U CN 203339644 U CN203339644 U CN 203339644U
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- signal transmission
- pressure side
- transmission device
- low voltage
- fault current
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Abstract
The utility model relates to a signal transmission device used among high-low voltage equipment of a fault current limiter in the system technology field. The signal transmission device comprises an isolation transformer arranged between a high voltage side power source loop and a low voltage side power source circuit, a controllable-impedance circuit connected in parallel between two ends of the high voltage side power source loop and a voltage sampling resistor connected in series with the low voltage side power source circuit. The signal transmission device can realize more convenient and more reliable signal transmission.
Description
Technical field
The utility model relates to a kind of device of technical field of power systems, specifically a kind of equipment room of the high-low pressure for fault current limiter signal transmitting apparatus.
Background technology
Large capacity fault current limiter is more and more extensive in the application of electric power system, for operate time and the higher requirement of reliability proposition of device.Large capacity fault current limiter based on directional blasting technology is widely used at present, and large capacity fault current limiter comprises the parts such as isolator, control device substantially.Its middle controller is mounted on high-tension apparatus, need to provide power supply for it, and its control action will be reflected at the low pressure Control Room.
The controller of existing corresponding function and backstage monitoring device occur on the market at present, adopt isolating transformer to carry out power delivery, adopt high photoelectric coupled device of isolating to realize the transmission of signal, its shortcoming is to realize that cost is higher, and there is certain risk in reliability: once occur that the breakdown high-voltage signal that will make of optocoupler directly alters to the low voltage control device.
The utility model content
The utility model, for the prior art above shortcomings, proposes a kind of equipment room of the high-low pressure for fault current limiter signal transmitting apparatus, can more conveniently realize reliably the signal transmission.
The utility model is achieved through the following technical solutions, and the utility model comprises: be arranged at isolating transformer between high-pressure side electric power loop, low-pressure side power circuit, be arranged in parallel in the impedance controlable electric current at electric power loop two ends, high-pressure side and be series at the voltage sampling resistor on the low-pressure side power circuit.
Described impedance controlable electric current comprises: the second resistance and the first reactance of series connection with it, this first reactance and a switch are in parallel.
Be in series with the electronic controller power supply on the electric power loop of described high-pressure side.
Be parallel with voltage detector on described voltage sampling resistor.
Technique effect
Compared with prior art, the utility model is used isolating transformer to carry out the high-low pressure isolation, only has not electrical connection of magnetic circuit link.Use single winding to realize power supply and signal transmission simultaneously, reduce the signal transmission cost, suffer low-pressure side equipment the risk of high pressure thunderbolt to drop to minimum.
Change the impedance of parallel circuits when the controller action of high-pressure side, now the voltage on sample resistance can change simultaneously; React the action situation of high-side devices by the voltage on the monitoring sampling resistor.
Electronic controller power acquisition wide input range, guarantee that the DC power supply of controller is normal when the impedance of both ends of power parallel circuits changes.
This device has simple in structure, reduces to realize cost, transmits advantage accurately, for the high-low pressure equipment room signal transmission of fault current limiter provides a kind of better solution.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented take technical solutions of the utility model under prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, the present embodiment comprises: be arranged at isolating transformer 3 between high-pressure side electric power loop 1, low-pressure side power circuit 2, be arranged in parallel in the impedance controlable electric current 4 at high-pressure side electric power loop 1 two ends and be series at the voltage sampling resistor R1 on low-pressure side power circuit 2.
Described impedance controlable electric current 4 comprises: the second resistance R 2 and the first reactance Z connected with it, this first reactance Z and a K switch are in parallel.
Be in series with electronic controller power supply 9 on described high-pressure side electric power loop 1.
Be parallel with voltage detector 10 on described voltage sampling resistor R1.
The present embodiment operation principle is as shown in Figure 2: under normal circumstances, K switch is opened, the first reactance Z place in circuit, when the actuating signal detecting unit detects firing pulse, the K switch closure, the first reactance Z, by short circuit, converts the impedance difference that arrives low-pressure side in two kinds of situations, make the voltage on voltage sampling resistor R1 change, this voltage of circuit monitoring in the low voltage monitoring device obtains the action situation.
The observation circuit of the low voltage monitoring device in the present embodiment adopts rectification circuit as sampling means, under normal operation, not conducting of rectifier bridge, late-class circuit is for off-position, after on high-tension side control device action, the rectifier bridge conducting, late-class circuit is made corresponding indication, comprises contact displacement and indicator light etc.
The DC/DC module PKV5321PI of the Ericsson that described electronic controller power acquisition is used, have the wide input range of 18-72V, guarantees the power supply reliability of electronic controller under two states.
Claims (3)
1. the equipment room of the high-low pressure for a fault current limiter signal transmitting apparatus, it is characterized in that, comprising: be arranged at isolating transformer between high-pressure side electric power loop, low-pressure side power circuit, be arranged in parallel in the impedance controlable electric current at electric power loop two ends, high-pressure side and be series at the voltage sampling resistor on the low-pressure side power circuit;
Described impedance controlable electric current comprises: the second resistance and the first reactance of series connection with it, this first reactance and a switch are in parallel.
2. device according to claim 1, is characterized in that, on the electric power loop of described high-pressure side, is in series with the electronic controller power supply.
3. device according to claim 1, is characterized in that, on described voltage sampling resistor, is parallel with voltage detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203686470U CN203339644U (en) | 2013-06-25 | 2013-06-25 | Signal transmission device used among high-low voltage equipment of fault current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203686470U CN203339644U (en) | 2013-06-25 | 2013-06-25 | Signal transmission device used among high-low voltage equipment of fault current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339644U true CN203339644U (en) | 2013-12-11 |
Family
ID=49708301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203686470U Expired - Lifetime CN203339644U (en) | 2013-06-25 | 2013-06-25 | Signal transmission device used among high-low voltage equipment of fault current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203339644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943010A (en) * | 2014-04-17 | 2014-07-23 | 国家电网公司 | Fault simulation transformer |
-
2013
- 2013-06-25 CN CN2013203686470U patent/CN203339644U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943010A (en) * | 2014-04-17 | 2014-07-23 | 国家电网公司 | Fault simulation transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |