CN102495258A - Method and device for transmitting voltage signal on multichannel high-capacity converter transformer valve side - Google Patents
Method and device for transmitting voltage signal on multichannel high-capacity converter transformer valve side Download PDFInfo
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- CN102495258A CN102495258A CN201110398857XA CN201110398857A CN102495258A CN 102495258 A CN102495258 A CN 102495258A CN 201110398857X A CN201110398857X A CN 201110398857XA CN 201110398857 A CN201110398857 A CN 201110398857A CN 102495258 A CN102495258 A CN 102495258A
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Abstract
The invention relates to a method and a device for transmitting a voltage signal on a multichannel high-capacity converter transformer valve side, and belongs to the technical field of transformers. The technical scheme is that: a measurement-level voltage signal is acquired according to a capacitive voltage share theory; when a system is switched on, capacitive current is generated, and is amplified by an amplifier, so that an effect of amplifying power is achieved; and by using the characteristic of the amplifier for multichannel parallel transmission, the signal is transmitted in a plurality of channels at a remote distance. The method and the device have the beneficial effects that: the device has the characteristics of simple structure and measurement accuracy, high stability and a small volume, is low in cost; furthermore, the stability and the safety of a product are improved greatly.
Description
Technical field
The present invention relates to a kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals and device, belong to the transformer technology field.
Background technology
Converter power transformer voltage on valve side value is unified very important safety index of DC power transmission system, therefore in servicely must monitor the change of current constantly and becomes the voltage on valve side value.But stretch into the valve Room because the change of current becomes valve side sleeve pipe, and directly link to each other, from the security consideration of the valve Room with valve Room bus; Voltage on valve side can't directly be measured; Therefore, what background technology generally adopted is the capacitance partial pressure principle of utilizing appearance formula sleeve pipe, becomes valve side bottom shielding of bushing voltage divider through the change of current and obtains conversion voltage afterwards; After carrying out electrical isolation through the voltage transformer (VT) in the control box again, be transferred to the pulpit, backstage.(shown in accompanying drawing 1) this kind technology is subject to the capacity that the bottom shielding of bushing voltage divider provides, and has limited circuit transmission range and institute's on-load; Be subject to isolating transformer Secondary Winding quantity, limited the Monitoring and Controlling screen quantity on backstage.
Summary of the invention
The purpose of this invention is to provide a kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals and device; Simple in structure, through-put power is big, multi-channel parallel output, electrical separation are good; Characteristics such as safety and stability; Can satisfy backstage control protection needs, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is: a kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals, and concrete steps are following: utilize the capacitance partial pressure principle, obtain measuring magnitude voltage signals; After system's conducting, can produce capacity current, with amplifier this capacity current is amplified, and then reach the effect of power amplification; But utilize the characteristics of amplifier multi-channel parallel transmission again, carry out the remote parallel transmission of hyperchannel to signal.
Said capacity current is the little current signal that is come out by the bottom shielding of bushing leading-out terminal, after amplifying through current amplifier, passes to the pulpit, backstage again, through signal analysis, has just obtained voltage signal.Said current amplifier has multiple output function, has realized many background monitorings.
The present invention adopts the accessory power supply power supply, guarantees the anti-interference and the independence of system.
Multi-channel and high capacity converter power transformer voltage on valve side signal transmitting apparatus; Comprise dividing potential drop electric capacity, bottom shielding of bushing leading-out terminal, current amplifier and pulpit; Dividing potential drop electric capacity is connected the bottom shielding of bushing leading-out terminal, and the output of dividing potential drop electric capacity connects current amplifier, and the output of current amplifier connects the pulpit; The little current signal that the bottom shielding of bushing leading-out terminal comes out after the current amplifier amplification, is passed to the pulpit, backstage again, through signal analysis, has just obtained voltage signal.
The bottom shielding of bushing leading-out terminal of transformer valve side is connected to dividing potential drop electric capacity one end, behind capacitance partial pressure, obtains current signal; After current signal gets into current amplifier; Power gets a promotion, and transfers out multiple signals from current amplifier again, is transferred to different pulpit, backstage; Through after the computing, just obtained voltage signal.
Good effect of the present invention: the present invention has simple in structure, measures characteristic of accurate, and is with low cost, good stability, and volume is little, significantly promotes the stability and the security of product.
Description of drawings
Fig. 1 is the background technology structural representation;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is a capacitance partial pressure schematic diagram of the present invention;
Among the figure: the 1st, dividing potential drop electric capacity, the 2nd, voltage transformer (VT), the 3rd, bottom shielding of bushing leading-out terminal, the 4th, current amplifier, the 5th, pulpit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further specified through embodiment.
A kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals, concrete steps are following: utilize the capacitance partial pressure principle, obtain measuring magnitude voltage signals; After system's conducting, can produce capacity current, with amplifier this capacity current is amplified, and then reach the effect of power amplification; But utilize the characteristics of amplifier multi-channel parallel transmission again, carry out the remote parallel transmission of hyperchannel to signal.
Said capacity current is the little current signal that is come out by the bottom shielding of bushing leading-out terminal, after amplifying through current amplifier, passes to the pulpit, backstage again, through signal analysis, has just obtained voltage signal.Said current amplifier has multiple output function, has realized many background monitorings.
The present invention adopts the accessory power supply power supply, guarantees the anti-interference and the independence of system.
Multi-channel and high capacity converter power transformer voltage on valve side signal transmitting apparatus; Comprise dividing potential drop electric capacity 1, bottom shielding of bushing leading-out terminal 2, current amplifier 4 and pulpit 5; Dividing potential drop electric capacity is connected the bottom shielding of bushing leading-out terminal; The output of dividing potential drop electric capacity connects current amplifier, and the output of current amplifier connects the pulpit; The little current signal that the bottom shielding of bushing leading-out terminal comes out after the current amplifier amplification, is passed to the pulpit, backstage again, through signal analysis, has just obtained voltage signal.
The bottom shielding of bushing leading-out terminal of transformer valve side is connected to dividing potential drop electric capacity one end, behind capacitance partial pressure, obtains current signal; After current signal gets into current amplifier; Power gets a promotion, and transfers out multiple signals from current amplifier again, is transferred to different pulpit, backstage; Through after the computing, just obtained voltage signal.
The bottom shielding of bushing Leakage Current produces when being the transformer load operation.Capacitive capacitance of bushing voltage divider principle: promptly tested high pressure U1 directly is added on the high-voltage arm capacitor, on low-voltage arm, tells the small voltage (like accompanying drawing 3) that is directly proportional with a sub-high pressure.C1 among the figure, C2 are respectively the height of voltage divider, low-voltage arm, and U1 is tested primary voltage, UC2 is the voltage divider output voltage.According to Circuit theory, can draw: U
C2=C
1U
1/ (C
1+ C
2)
Can know by following formula,, can obtain required intrinsic standoff ratio as long as select the electric capacity of appropriate C 1 and C2.
Claims (6)
1. a multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals is characterized in that concrete steps are following: utilize the capacitance partial pressure principle, obtain measuring magnitude voltage signals; After system's conducting, can produce capacity current, with amplifier this capacity current is amplified, and then reach the effect of power amplification; But utilize the characteristics of amplifier multi-channel parallel transmission again, carry out the remote parallel transmission of hyperchannel to signal.
2. the multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals according to claim 1; It is characterized in that: said capacity current is the little current signal that is come out by the bottom shielding of bushing leading-out terminal; After the current amplifier amplification; Pass to the pulpit, backstage again,, just obtained voltage signal through signal analysis.
3. a kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals according to claim 2 is characterized in that said current amplifier has multiple output function, has realized many background monitorings.
4. a kind of multi-channel and high capacity converter power transformer voltage on valve side method for transmitting signals according to claim 2 is characterized in that adopting the accessory power supply power supply.
5. multi-channel and high capacity converter power transformer voltage on valve side signal transmitting apparatus; It is characterized in that comprising dividing potential drop electric capacity (1), bottom shielding of bushing leading-out terminal (2), current amplifier (4) and pulpit (5); Dividing potential drop electric capacity is connected the bottom shielding of bushing leading-out terminal; The output of dividing potential drop electric capacity connects current amplifier, and the output of current amplifier connects the pulpit; The little current signal that the bottom shielding of bushing leading-out terminal comes out after the current amplifier amplification, is passed to the pulpit, backstage again, through signal analysis, has just obtained voltage signal.
6. the multi-channel and high capacity converter power transformer voltage on valve side signal transmitting apparatus according to claim 5 is characterized in that the bottom shielding of bushing leading-out terminal is connected to dividing potential drop electric capacity one end, behind capacitance partial pressure; Obtain current signal, after current signal got into current amplifier, power got a promotion; Transfer out multiple signals from current amplifier again; Be transferred to different pulpit, backstage,, just obtained voltage signal through after the computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110398857XA CN102495258A (en) | 2011-12-06 | 2011-12-06 | Method and device for transmitting voltage signal on multichannel high-capacity converter transformer valve side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110398857XA CN102495258A (en) | 2011-12-06 | 2011-12-06 | Method and device for transmitting voltage signal on multichannel high-capacity converter transformer valve side |
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| CN102495258A true CN102495258A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110398857XA Pending CN102495258A (en) | 2011-12-06 | 2011-12-06 | Method and device for transmitting voltage signal on multichannel high-capacity converter transformer valve side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590048A (en) * | 2024-01-17 | 2024-02-23 | 南京中鑫智电科技有限公司 | Resistor voltage division method and system of converter transformer valve side sleeve end screen voltage divider |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1484034A (en) * | 2002-09-18 | 2004-03-24 | 新疆特变电工股份有限公司 | On-line intelligent monitoring system for transformer and intelligent analysis diagnosis method thereof |
| CN201717082U (en) * | 2010-06-07 | 2011-01-19 | 中国西电电气股份有限公司 | Intelligent online monitoring oil-impregnated paper condenser type transformer bushing |
| EP2302405A2 (en) * | 2009-09-28 | 2011-03-30 | Merawex spolka z ograniczona odpowiedzialnoscia | A system for measuring resistance of battery circuits |
-
2011
- 2011-12-06 CN CN201110398857XA patent/CN102495258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1484034A (en) * | 2002-09-18 | 2004-03-24 | 新疆特变电工股份有限公司 | On-line intelligent monitoring system for transformer and intelligent analysis diagnosis method thereof |
| EP2302405A2 (en) * | 2009-09-28 | 2011-03-30 | Merawex spolka z ograniczona odpowiedzialnoscia | A system for measuring resistance of battery circuits |
| CN201717082U (en) * | 2010-06-07 | 2011-01-19 | 中国西电电气股份有限公司 | Intelligent online monitoring oil-impregnated paper condenser type transformer bushing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590048A (en) * | 2024-01-17 | 2024-02-23 | 南京中鑫智电科技有限公司 | Resistor voltage division method and system of converter transformer valve side sleeve end screen voltage divider |
| CN117590048B (en) * | 2024-01-17 | 2024-03-22 | 南京中鑫智电科技有限公司 | Resistor voltage division method and system of converter transformer valve side sleeve end screen voltage divider |
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Application publication date: 20120613 |