CN206892310U - A kind of divider second divided voltage plate on-line detecting system - Google Patents
A kind of divider second divided voltage plate on-line detecting system Download PDFInfo
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- CN206892310U CN206892310U CN201720590876.5U CN201720590876U CN206892310U CN 206892310 U CN206892310 U CN 206892310U CN 201720590876 U CN201720590876 U CN 201720590876U CN 206892310 U CN206892310 U CN 206892310U
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Abstract
The utility model discloses a kind of divider second divided voltage plate on-line detecting system, the divider second divided voltage plate on-line detecting system includes state output module, on-line checking module, injection module and acquisition module, wherein, the signal output part of injection module is electrically connected with second divided voltage plate input and on-line checking module by signal input, second divided voltage plate output end is electrically connected with by acquisition module and on-line checking module by signal input, and the on-line checking module by signal output end is electrically connected with state output module input.The utility model is by injection module by the carrier signal injection containing special characteristic to second divided voltage plate, on-line checking module is output to by acquisition module again, realize the real-time detection to second divided voltage plate, second divided voltage plate faults itself is avoided to cause system malfunction, facilitate operation maintenance personnel quick detection to be out of order board simultaneously, improve the utilization rate of DC power transmission line.
Description
Technical field
The utility model belongs to the DC voltage measurement field of DC voltage power transmission engineering, and in particular to a kind of DC partial voltage
Device second divided voltage plate on-line detecting system.
Background technology
Divider is a kind of capacitance-resistance composite unit for being used to measure DC voltage in (spy) super high voltage direct current electricity transmission engineering
Part, (spy) superhigh voltage DC voltage signal is transformed into can be with small-signal measured directly.
(spy) superhigh voltage DC divider is by high-voltage bridge arms capacitance-resistance, low pressure bridge arm capacitance-resistance and second divided voltage plate three parts group
Into.Carried as shown in figure 1, tested voltage jump configures polylith second divided voltage plate in high pressure and low pressure bridge arm, according to requirement of engineering
Measuring system (being provided with standby second divided voltage board channel) is given for multichannel measurement passage.High-voltage bridge arms are filled using special warfare
Envelope, it is dry-type encapsulated.Small interior is installed out of doors or controlled to second divided voltage plate according to requirement of engineering.
(spy) HVDC divider is mainly made up of Resistor-Capacitor Unit, in whole divider, the survey as DC voltage
Amount, resistance has served relatively important.Meanwhile the general dual or multiplex configuration of DC control and protection system, it is corresponding more
Change measuring system again and DC voltage is gathered by different second divided voltage plates.
Understand that the soft fault (Resistor-Capacitor Unit parameter shift) of second divided voltage plate all the way not only influences this measurement and returned according to Fig. 1
Road, other loops are also influenced whether, and then cause the malfunction of Control protection system, cause whole DC transmission system locking etc.
Have a strong impact on the situation of operation.Meanwhile when transmission line of electricity is run, Online Judge, Zhi Neng can not be carried out to second divided voltage plate
The part could be overhauled after stopping transport, very inconvenient.
Therefore designing a kind of on-line detecting system, detection is necessary in real time to the progress of second divided voltage plate.
Utility model content
The utility model provides a kind of second divided voltage plate real-time online detecting system, can realize and second divided voltage plate is carried out in fact
When detect, avoid second divided voltage plate faults itself from causing system malfunction, while facilitate operation maintenance personnel quick detection to be out of order plate
Card, improve the utilization rate of DC power transmission line.
The technical solution adopted in the utility model is as follows：
A kind of divider second divided voltage plate on-line detecting system, wherein, divider is used for direct current high tension transmission
The measurement of DC voltage in engineering, the divider include high-voltage bridge arms, low pressure bridge arm and second divided voltage plate, are tested voltage
Both ends be connected respectively with the input of high-voltage bridge arms and the output end of low pressure bridge arm, the output ends of high-voltage bridge arms and low pressure bridge arm
Input and the input of second divided voltage plate be all connected with, the output end of second divided voltage plate is connected with the output end of low pressure bridge arm,
The divider second divided voltage plate on-line detecting system include state output module, on-line checking module, injection module with
And acquisition module, wherein, signal output part and the second divided voltage plate input and on-line checking module by signal of injection module input
End is electrically connected with, and second divided voltage plate output end is electrically connected with by acquisition module and on-line checking module by signal input, institute
On-line checking module by signal output end is stated to be electrically connected with state output module input.
The on-line checking module is located at the measuring system of direct current high tension transmission engineering.
The state output module is located at the DC control and protection system of direct current high tension transmission engineering.
The injection module includes photoelectric conversion module power supply, digital signal processing module and analog front-end module, opto-electronic conversion
Modular power source is that digital signal processing module and analog front-end module are powered, and the digital signal processing module includes signal source and signal acquisition
Device, the analog front-end module include transformer, electric capacity and resistance, wherein, electric capacity and resistor coupled in parallel form parallel branch, described
Parallel branch is connected with signal picker both ends, signal source connected by transformer with the parallel branch after with second divided voltage plate
One end connection, signal source connected by signal picker and the other end of second divided voltage plate and the output end of on-line checking module
Connect.
The beneficial effects of the utility model are：The utility model is by injection module by the carrier signal injection containing special characteristic
On-line checking module is output to second divided voltage plate, then by acquisition module, the real-time detection to second divided voltage plate is realized, avoids
Second divided voltage plate faults itself causes system malfunction, while facilitates operation maintenance personnel quick detection to be out of order board, improves direct current
The utilization rate of transmission line of electricity；Meanwhile in addition to injection module increases the output of characteristic frequency on the basis of acquisition module, other
Hardware can share identical hardware, on-line checking module and state output module with acquisition module, use original measuring system
It is simple in construction with the hardware resource of Control protection system, do not increase hardware cost.
Brief description of the drawings
Fig. 1 be the utility model divider second divided voltage plate on-line detecting system background technology in divider
Circuit theory diagrams；
Fig. 2 is the structural representation of the utility model divider second divided voltage plate on-line detecting system；
Fig. 3 is the circuit theory diagrams of the utility model injection module；
Fig. 4 is structural representation when injection module of the present utility model is connected with divider.
Wherein, 1, high-voltage bridge arms；2nd, low pressure bridge arm；3rd, second divided voltage plate；4th, injection module；5th, acquisition module；6th, it is online
Detection module；7th, state output module；8th, photoelectric conversion module power supply；9th, digital signal processing module；10th, analog front-end module.
Embodiment
Content of the present utility model is described in further details with reference to the accompanying drawings and detailed description.
A kind of divider second divided voltage plate on-line detecting system, refer to shown in Fig. 2, wherein, divider is used
The measurement of DC voltage in direct current high tension transmission engineering, the divider include high-voltage bridge arms 1, low pressure bridge arm 2 and two
Secondary partial pressure plate 3, the both ends of tested voltage are connected with the input of high-voltage bridge arms 1 and the output end of low pressure bridge arm 2 respectively, high breaking the bridge
The output end of arm 1 is all connected with the input of low pressure bridge arm 2 and the input of second divided voltage plate 3, the output end of second divided voltage plate 3
It is connected with the output end of low pressure bridge arm 2, the divider second divided voltage plate on-line detecting system includes state output module
7th, on-line checking module 6, injection module 4 and acquisition module 5, wherein, signal output part and the second divided voltage plate of injection module 4
3 inputs and the signal input part of on-line checking module 6 are electrically connected with, the output end of second divided voltage plate 3 by acquisition module 5 with
The signal input part of line detection module 6 is electrically connected with, and the signal output part of on-line checking module 6 inputs with state output module 7
End is electrically connected with, the DC control and protection system of the output end of the state output module 7 connection DC transmission engineering.
Specifically, as shown in figure 3, the injection module 4 includes photoelectric conversion module power supply 8, digital signal processing module 9 and mould
Intend front-end module 10, photoelectric conversion module power supply 8 is that digital signal processing module 9 and analog front-end module 10 are powered, at the numeral
Reason module 9 includes signal source V3 and signal picker XMM1, the analog front-end module 10 including transformer T1, electric capacity C17 and
Resistance R6, wherein, electric capacity C17 and resistance R6 formation parallel branches in parallel, the parallel branch and signal picker XMM1 both ends
Connection, signal source V3 are connected after being connected by transformer T1 with the parallel branch with one end of second divided voltage plate 3, signal source V3
It is all connected with by signal picker XMM1 and the other end of second divided voltage plate 3 and the output end of on-line checking module 6.Injection module
4 structural representation when being connected with divider as shown in figure 4, photoelectric conversion module power supply 8 can received optical power or other
Power convert is the secondary working power needed for injection module 4；Analog front-end module 10 provides to be injected with the signal of low pressure bridge arm 2
With the analog interface of back production；On-line checking mould is sent on the back production signal that the collection of digital signal processing module 9 passes through analog front-end module
Block 6, while Injection Signal caused by digital signal processing module 9, low pressure bridge arm 2 is injected into by analog front-end module 10.
The injection module 4 can use luminous power pipe remote power feeding or direct power supply to power, and meet the application of different engineerings,
Carrier wave of the injection module 4 containing special characteristic, signal specific is injected on the low pressure bridge arm 2 of divider, injected simultaneously
Module 4 is counter to be sent to measuring system to carrier signal retaking of a year or grade；The injection module 4 is modified according to original acquisition module 3, is increased
Addend weighted-voltage D/A converter and simulation output modulate circuit, injection module 4 is built, using original processor resource, uses look-up table side
Method, produce characteristic signal.In injection process, injection module 4 can be output to low pressure by analog-to-digital conversion and output modulate circuit
On bridge arm 2；Simultaneously the output end of injection module 4 be also connected with on-line checking module 6, by the signal specific of injection module 4 export to
Line detection module 6 is used as Injection Signal a reference value.
In the utility model, in view of divider is used for the measurement of DC voltage, it can inject than measurement signal frequency
High signal can also inject the special characteristic signal such as small echo, it is possible to realize the multiplexing of frequency without mutually dry in the application
Disturb.It can also be separated respectively using the digital processing means such as digital filtering in acquisition module 5.On the other hand, it is existing to adopt
The sample frequency of collecting system is mostly more than 10kHz, and according to Nyquist law, characteristic signal frequency limit is within 5kHz；With
Exemplified by Fig. 3, the DC voltage at nominal low pressure bridge arm is 100V, and the output of partial pressure plate is 5V, and Injection Signal passes through infusion circuit
Decay with partial pressure two-stage, decay to more than 200 millivolts；By digital processing, the influence to system can be ignored；
The characteristic signal that state output module 7 detects according to the sampled value and on-line checking module 6 of injection module 4
Information is compared, and the expectation amplitude of the desired character signal of second divided voltage plate 3, root are calculated according to the sampled value of injection module 4
It is whether normal according to deviation, the state estimation of second divided voltage plate 3 is carried out, provides the status information of second divided voltage plate 3, and is exported corresponding
State is to DC control and protection system as action auxiliary signal.
Preferably, on-line checking module 6 is located at original measuring system of direct current high tension transmission engineering, state output module
7 are located at original DC control and protection system of direct current high tension transmission engineering, so, utilize original hardware and software platform, structure
On-line checking module 6 and state output module 7, do not increase new hardware；In the present system, simply increase injection module 4 newly and connect
The installation of line, the installation of injection module can be carried out using the wiring of standby partial pressure plate and the position of acquisition module 5, it is very square
Just.Injection module 4 is using hardware modifications are carried out to original acquisition module all the way 5, and physical arrangement and other hardware are using original
Some designs, the on-line checking to second divided voltage plate can be both realized, and substantially increase the reliability of DC transmission system.
In the present system, injection module 4 is that the entrance of second divided voltage plate 3 injects the carrier wave of special characteristic to low pressure bridge arm 2
Signal, exported by acquisition module 5 to on-line checking module 6, output collection letter of the on-line checking module 6 to second divided voltage plate 3
Number handled, detect the information such as the amplitude of signal specific and detect by the characteristic signal after the partial pressure of second divided voltage plate 3, pass through
The features such as the amplitude to the signal monitor, and realize the on-line checking to second divided voltage plate 3, first detection module 6 will detect again
Signal output to state input module 7；Injection module 4 carries out retaking of a year or grade to characteristic signal simultaneously, anti-by first detection module 6
State input module 7 is sent to, as Injection Signal a reference value.State input module 7 carries out secondary point according to Injection Signal feature
The state estimation of pressing plate 3, corresponding state is exported to Control protection system as action auxiliary signal, is realized to second divided voltage plate 3
Aging be tracked and be fitted, so as to realize the fault pre-alarming to equipment.
Although the utility model is illustrated by specific embodiment, it will be appreciated by those skilled in the art that, not
In the case of departing from the scope of the utility model, various conversion and equivalent substitute can also be carried out to the utility model.In addition, it is directed to
Particular condition or application, various modifications can be made to the utility model, without departing from the scope of the utility model.Therefore, this reality
Disclosed specific embodiment is not limited to new, and the whole fallen into the range of the utility model claims should be included
Embodiment.
Claims (4)
1. a kind of divider second divided voltage plate on-line detecting system, wherein, divider is used for direct current high tension transmission work
The measurement of DC voltage in journey, the divider include high-voltage bridge arms (1), low pressure bridge arm (2) and second divided voltage plate (3),
The both ends of tested voltage are connected with the input of high-voltage bridge arms (1) and the output end of low pressure bridge arm (2) respectively, high-voltage bridge arms (1)
Output end be all connected with the input of low pressure bridge arm (2) and the input of second divided voltage plate (3), second divided voltage plate (3) it is defeated
Go out end to be connected with the output end of low pressure bridge arm (2), it is characterised in that the divider second divided voltage plate on-line detecting system
Including state output module (7), on-line checking module (6), injection module (4) and acquisition module (5)；
Wherein, the signal output part of injection module (4) and second divided voltage plate (3) input and on-line checking module (6) signal are defeated
Enter end to be electrically connected with, second divided voltage plate (3) output end passes through acquisition module (5) and on-line checking module (6) signal input part
It is electrically connected with, on-line checking module (6) signal output part is electrically connected with state output module (7) input.
2. divider second divided voltage plate on-line detecting system according to claim 1, it is characterised in that described online
Detection module (6) is located at the measuring system of direct current high tension transmission engineering.
3. divider second divided voltage plate on-line detecting system according to claim 1, it is characterised in that the state
Output module (7) is located at the DC control and protection system of direct current high tension transmission engineering.
4. divider second divided voltage plate on-line detecting system according to claim 1, it is characterised in that the injection
Module (4) includes photoelectric conversion module power supply (8), digital signal processing module (9) and analog front-end module (10), photoelectric conversion module
Power supply (8) is that digital signal processing module (9) and analog front-end module (10) are powered, and the digital signal processing module (9) includes signal source
(V3) and signal picker (XMM1), the analog front-end module (10) include transformer (T1), electric capacity (C17) and resistance
(R6), wherein, electric capacity (C17) and resistance (R6) parallel connection form parallel branch, the parallel branch and signal picker (XMM1)
Both ends connect, signal source (V3) connected by transformer (T1) with the parallel branch after with one end of second divided voltage plate (3) company
Connect, signal source (V3) is defeated by the other end of signal picker (XMM1) and second divided voltage plate (3) and on-line checking module (6)
Go out end to be all connected with.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720590876.5U CN206892310U (en) | 2017-05-24 | 2017-05-24 | A kind of divider second divided voltage plate on-line detecting system |
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| CN201720590876.5U CN206892310U (en) | 2017-05-24 | 2017-05-24 | A kind of divider second divided voltage plate on-line detecting system |
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| CN206892310U true CN206892310U (en) | 2018-01-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115795276A (en) * | 2022-11-22 | 2023-03-14 | 南京电力设计研究院有限公司 | Secondary circuit pressing plate state evaluation method based on wavelet analysis and machine learning |
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2017
- 2017-05-24 CN CN201720590876.5U patent/CN206892310U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115795276A (en) * | 2022-11-22 | 2023-03-14 | 南京电力设计研究院有限公司 | Secondary circuit pressing plate state evaluation method based on wavelet analysis and machine learning |
| CN115795276B (en) * | 2022-11-22 | 2024-04-26 | 南京电力设计研究院有限公司 | Secondary circuit pressing plate state evaluation method based on wavelet analysis and machine learning |
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