CN207650299U - The pilot system of switching 10kV shunt reactor switching overvoltage braking measures - Google Patents
The pilot system of switching 10kV shunt reactor switching overvoltage braking measures Download PDFInfo
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- CN207650299U CN207650299U CN201721784337.1U CN201721784337U CN207650299U CN 207650299 U CN207650299 U CN 207650299U CN 201721784337 U CN201721784337 U CN 201721784337U CN 207650299 U CN207650299 U CN 207650299U
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Abstract
The utility model discloses a kind of pilot systems of switching 10kV shunt reactors switching overvoltage braking measure, include the research of the acquisition and recording of signal and braking measure.The acquisition and recording of signal is realized by the monitoring system of sensor, coaxial cable, industrial personal computer three parts composition.The control of braking measure, then consider breaker the different inhibition form of three kinds of operating mode, arrester and rc absorber and identical inhibition form under influence of the installation site to inhibition.The utility model to transient voltage, the current signal in the operation of switching shunt reactor can not only effectively capture and be acquired, and then the changing rule of signal in transient process can be accurately analyzed, but also a more perfect testing program has been researched and proposed to the braking measure of switching shunt reactor switching overvoltage.The utility model all has important directive significance for the selection of the development test of switching shunt reactor switching overvoltage braking measure in substation and optimal inhibition scheme.
Description
Technical field
The utility model is related to switching shunt reactor operating operation test technical field, especially a kind of switching 10kV electricity in parallel
The pilot system of anti-device switching overvoltage braking measure.
Background technology
With the development of human society production and living, power system load total amount is more and more heavy, and the fluctuation of load is also cured
Hair is complicated, in order to maintain the reliability and stability of power supply, China generally to use shunt reactor conduct in substation low-voltage side
The reactive-load compensation equipment of power system voltage regulating.Vacuum circuit breaker is widely used in 10kV and following system due to its excellent performance
In, however during vacuum circuit breaker switching, the insulation of the equipment such as breaker explosion, reactor and station change but occurs often
The accidents such as breakdown, seriously affect the normal operation of electric system.
Currently, existing patent focus primarily upon substation on-line monitoring and data acquisition, such as application No. is
201420311052.6 " a kind of 10kV shunt reactors switching operation pilot system ", should be patent disclosed that 10kV electricity in parallel
The switching operation process monitoring system and monitoring method of anti-device, the system handle signal by the sensor and receiving of inverted signal
Industrial personal computer two parts form, and have certain directive significance to field test.
But the comparison for not thering is corresponding patent to carry out braking measure to the switching overvoltage during field test switching
Research.Therefore, a kind of pilot system of switching 10kV shunt reactors switching overvoltage braking measure is designed, switching is accurately captured
The transient process of combined floodgate prebreakdown and separating brake Restriking overvoltage in the process probes into accident true cause and finds optimal inhibition side
Case is significant.
Utility model content
The purpose of this utility model is the experiment system of the switching 10kV shunt reactor switching overvoltage braking measures proposed
System；The system also provides a comparison of different operation measure other than the overvoltage current signal to field test is monitored acquisition
Under inhibition, and generate optimal inhibition scheme.
The purpose of this utility model is achieved through the following technical solutions：
The pilot system of switching 10kV shunt reactors switching overvoltage braking measure provided by the utility model, including master
Become, stand with change, current-limiting reactor, signal gathering unit, industrial personal computer and test circuit unit；
The test circuit unit includes breaker and experiment reactor；
The main transformer is connect by current-limiting reactor with 10kV busbares；The station is connected with change by cable and 10kV busbares
It connects；
The experiment reactor is connect by cable with breaker；The breaker is connect with 10kV busbares；
The signal gathering unit is used to acquire the transient signal during switching shunt reactor；
The signal gathering unit is connect by coaxial cable with industrial personal computer；
The transient signal is input to by coaxial cable in industrial personal computer.
Further, the signal gathering unit includes voltage sensor and current sensor；The voltage sensor is used for
Obtain voltage transient signal；The current sensor is for obtaining current temporary state signal；
The voltage transient signal includes busbar three-phase voltage, stand with become three-phase voltage, circuit breaker load side three-phase voltage,
Shunt reactor three-phase voltage and shunt reactor neutral point voltage；The current temporary state signal include station with become three-phase current,
The neutral point current signal of shunt reactor three-phase current and shunt reactor.
Further, the industrial personal computer includes data collecting card, data storage card and manager；The data collecting card passes through
Coaxial cable is connect with signal gathering unit；The data collecting card and data storage card are connect with manager respectively；The number
According to capture card for acquiring the voltage transient signal obtained by sensor and current temporary state signal；The data storage card is used for
Store voltage transient signal and current temporary state signal；The manager is for handling voltage transient signal and current temporary state signal.
Further, further include the control of braking measure, the control of the braking measure includes the choosing of breaker operating mode
It selects, arrester installation site and rc absorber installation site；
The selection of the breaker operating mode has breaker phase selection pattern wiring and the non-phase selection pattern wiring of breaker；
The installation site of the arrester is respectively cable head at shunt reactor, cable end piece at shunt reactor,
The end stood with cable at the head end of cable at change and station change；
The installation site of the rc absorber is respectively cable head at shunt reactor, cable is last at shunt reactor
End, the end stood with cable at the head end of cable at change and station change.
By adopting the above-described technical solution, the utility model has the following advantages：
The unicity that the utility model is no longer limited to busbar voltage obtains, and can acquire the voltage and current of multiple measurement points
Signal, the field test data of acquisition can generate overvoltage during many aspects are to switching and carry out deeply thorough point
Analysis, while breaker operating mode and installation site can also be probed into inhibition by applying different Restrain measurements
Influence, the strick precaution to substation's switching shunt reactor overvoltage, have very strong engineering value.
Other advantages, target and feature of the utility model will be explained in the following description to a certain extent
It states, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or
Person can be instructed from the practice of the utility model.The target of the utility model and other advantages can be said by following
Bright book is realized and is obtained.
Description of the drawings
The description of the drawings of the utility model is as follows.
Fig. 1 is the arrangement schematic diagram of the signal measurement point of the utility model field test；
Fig. 2 is the utility model signal transmission schematic diagram；
Fig. 3 is the experiment thinking schematic diagram of the utility model field test；
Fig. 4 is the restraining device scheme of installation of the utility model field test.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1
As shown, the experiment system of switching 10kV shunt reactors switching overvoltage braking measure provided in this embodiment
System, including main transformer, use of standing change, current-limiting reactor, signal gathering unit, industrial personal computer and test circuit unit；
The test circuit unit includes breaker and experiment reactor；The main transformer is female by current-limiting reactor and 10kV
Line connects；The station is connect by cable with 10kV busbares with change；The experiment reactor is connect by cable with breaker；Institute
Breaker is stated to connect with 10kV busbares；The signal gathering unit is used to acquire the transient state letter during switching shunt reactor
Number；The signal gathering unit is connect by coaxial cable with industrial personal computer；The transient signal is input to work by coaxial cable
In control machine.
The signal gathering unit includes voltage sensor and current sensor；The voltage sensor is for obtaining voltage
Transient signal；The current sensor is for obtaining current temporary state signal；
The voltage transient signal includes bus bar side three-phase voltage, stands with change three-phase voltage, circuit breaker load side three-phase electricity
Pressure, shunt reactor three-phase voltage and shunt reactor neutral point voltage；The current temporary state signal includes station change three-phase electricity
The neutral point current signal of stream, shunt reactor three-phase current and shunt reactor.
The industrial personal computer includes data collecting card, data storage card and manager；The data collecting card passes through coaxial electrical
Cable is connect with signal gathering unit；The data collecting card and data storage card are connect with manager respectively；The data acquisition
Card is for acquiring the voltage transient signal obtained by sensor and current temporary state signal；The data storage card is for storing electricity
Press transient signal and current temporary state signal；The manager is for handling voltage transient signal and current temporary state signal.
Further include the control of braking measure, the control of the braking measure includes selecting, taking shelter from the thunder for breaker operating mode
The installation site of device and the installation site of rc absorber；
The breaker, voltage zero-cross avoids prebreakdown when phase control techniques can ensure to close a floodgate, current over-zero when separating brake
Fracture gap is sufficiently large to be avoided restriking.
The arrester, generally in parallel with by protection equipment, a substantially nonlinear resistance, resistance value is very under normal voltage
Greatly, after voltage is more than some threshold value, resistance value is just reduced rapidly, and energy is released over the ground by valve block, can effectively reduce electricity
Pressure amplitude value.
The rc absorber is added circuit and changes original high frequency oscillation circuit later, and absorption resistance can add
The decaying of fast overvoltage, Absorption Capacitance can reduce the frequency of oscillation of overvoltage to reduce steepness.
The selection of the breaker operating mode has breaker phase selection pattern wiring and the non-phase selection pattern wiring of breaker；
The installation site of the arrester is respectively cable head at shunt reactor, cable end piece at shunt reactor,
The end stood with cable at the head end of cable at change and station change；
The installation site of the rc absorber is respectively cable head at shunt reactor, cable is last at shunt reactor
End, the end stood with cable at the head end of cable at change and station change.
The voltage sensor of the present embodiment uses condenser divider, current sensor to use Rogowski coil；
Wherein, the voltage and current signals during the acquired shunt reactor switching operation of sensor pass through coaxial cable
Undamped transmission, and acquired, be recorded on the data storage disk of industrial personal computer by the capture card of industrial personal computer, while is aobvious in screen
Show, convenient for the transient process of observation overvoltage overcurrent in real time.
Voltage sensor measures the voltage signal of following 5 points, including bus bar side three-phase voltage, stand with become three-phase voltage,
Circuit breaker load side three-phase voltage, shunt reactor three-phase voltage and shunt reactor neutral point voltage amount to 13 voltage letters
Number channel；The current signal of 3 points below current sensor measurement, including station change three-phase current, shunt reactor three-phase electricity
The neutral point current of stream and shunt reactor amounts to 7 channel current signals.The industrial personal computer, including data collecting card, data
Storage card and manager, for recording the secondary singal converted by sensor.
The coaxial cable amounts to 20, voltage-current sensor and capture card is connected.
The control of the braking measure includes the selection of breaker operating mode, the installation site of arrester and resistance-capacitance absorption
The installation site of device.The selection of the breaker operating mode has phase selection pattern and non-phase selection pattern；Under phase selection pattern, withouyt
Restraining device probes into the inhibition of its overvoltage；Under non-phase selection pattern, install additional braking measure, change above-mentioned arrester and
The installation site of rc absorber：Cable head at shunt reactor, is stood with cable at change at cable end piece at shunt reactor
The end of cable at head end and station change, it is collected by comparative analysis to probe into influence of the different location to inhibition
Transient voltage current waveform is to obtain best Restrain measurement.
The arrester, including 12/32.4 and 17,/45 two kind of VA characteristic curve, change installation site test and inhibit effect
Fruit, position includes cable head at shunt reactor, cable end piece at shunt reactor, stands and is used with the head end and station of cable at change
The end of cable at change.The rc absorber, installation site change is identical with arrester, does not repeat.
Embodiment 2
The pilot system of switching 10kV shunt reactors Overvoltage suppressing Study on Measures provided by the utility model in use,
Need four aspects of installation for being monitored the selection of device, the selection of measurement point, the thinking of experiment and restraining device.
Monitoring device includes sensor, coaxial cable and industrial personal computer.Sensor includes current sensor and voltage sensor,
Voltage sensor selects 10kV capacitive dividers, intrinsic standoff ratio 350:1, current sensor selects Rogowski coil, attenuation multiple
It is divided into 10 times and 100 times.Since the frequency of oscillation occurred in field test is in 50Hz-1MHz, sensor is needed at this
Frequency range has good frequency response not to be distorted.Sensor also needs to meet substation 10kV pressurized system water simultaneously
Flat needs.Since the impedance of industry control machine equipment is 50 ohm, therefore the coaxial cable being attached thereto needs 50 ohm of BNC
To ensure that signal is transferred to industrial personal computer from coaxial cable catadioptric does not occur for head.In addition the capture card frequency acquisition of industrial personal computer
Should not be too low, the frequency acquisition of the information being otherwise easily lost inside transient-wave, field test is set as 20MHz.
Fig. 1 is signal arrangement principle in the operating operation test method of 10kV shunt reactor switchings, including voltage measurement point, electricity
Flow measurement point.It specifically includes：Voltage measurement point includes busbar (#1), stands with change (#2), circuit breaker load (#3), shunt reactor
(#4), shunt reactor neutral point (#5).Wherein #1-#4 is three-phase voltage signal channel, in addition the single voltage signal of #5 is logical
Road amounts to 13 voltage signal channels.Current measurement point includes in station change (#6), shunt reactor (#7) and shunt reactor
Property point (#8).Wherein #6, #7 are three-phase current signal channels, in addition channel current signal single #8, amounts to 7 current signals
Channel.
Fig. 2 is the transmission figure of signal in this example, and capacitive divider and Rogowski coil are by the high voltage of primary side, strong
Electric current is converted into low-voltage, the secondary singal of weak current.By the cooperation of coaxial cable and build-out resistor by secondary singal into one
It walks and is propagated toward industrial personal computer direction, decaying probe is recycled to carry out Scaling to signal, ensure that the signal reached will not be to industry control
Machine damages, and finally records data in the storage card of industrial personal computer, and manager can then call in processing storage card
Data are so as to ex-post analysis.
Fig. 3 is the experiment thinking schematic diagram of this example.Breaker operating mode is chosen to be phase selection pattern first, is not added with suppression
Measure processed judges whether phase selection pattern can be used as a kind of braking measure according to test data；However by breaker operating mode
It is chosen to be non-phase selection pattern, unconstrained measure is carried out under the pattern, arrester is installed additional, installs the experiment of rc absorber three classes additional,
The inhibition of comparative analysis arrester and rc absorber.Simultaneously it is further noted that not only to consider the classification of restraining device
It influences, it is also necessary to consider the influence of restraining device installation site.
Fig. 4 is four kinds of situations of restraining device installation site, including cable head (a) at the change of station, is stood with cable at change
Cable head (c) and cable end piece (d) at reactor at end (b), reactor.
To sum up, above-mentioned test method not only allows for the difference of restraining device, it is also considered that restraining device is installed after determining
Influence of the difference of position to inhibition.By the comparison of different braking measure feelings, best Restrain measurement is obtained.To avoid
Contingency, this example need switching operation 5-10 times for carrying out breaker, each switching operation interval under each braking measure
5-10 minutes.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, should all without departing from the objective and range of the technical program
Cover in the scope of protection of the utility model.
Claims (4)
1. the pilot system of switching 10kV shunt reactor switching overvoltage braking measures, it is characterised in that：Including main transformer, use of standing
Change, current-limiting reactor, signal gathering unit, industrial personal computer and test circuit unit；
The test circuit unit includes breaker and experiment reactor；
The main transformer is connect by current-limiting reactor with 10kV busbares；The station is connect by cable with 10kV busbares with change；
The experiment reactor is connect by cable with breaker；The breaker is connect with 10kV busbares；
The signal gathering unit is used to acquire the transient signal during switching shunt reactor；
The signal gathering unit is connect by coaxial cable with industrial personal computer；
The transient signal is input to by coaxial cable in industrial personal computer.
2. the pilot system of switching 10kV shunt reactors switching overvoltage braking measure as described in claim 1, feature
It is：The signal gathering unit includes voltage sensor and current sensor；The voltage sensor is temporary for obtaining voltage
State signal；The current sensor is for obtaining current temporary state signal；
The voltage transient signal includes busbar three-phase voltage, stands with change three-phase voltage, circuit breaker load side three-phase voltage, parallel connection
Reactor three-phase voltage and shunt reactor neutral point voltage；The current temporary state signal includes station change three-phase current, parallel connection
The neutral point current signal of reactor three-phase current and shunt reactor.
3. the pilot system of switching 10kV shunt reactors switching overvoltage braking measure as described in claim 1, feature
It is：The industrial personal computer includes data collecting card, data storage card and manager；The data collecting card by coaxial cable with
Signal gathering unit connects；The data collecting card and data storage card are connect with manager respectively；The data collecting card is used
The voltage transient signal and current temporary state signal obtained by sensor in acquisition；The data storage card is temporary for storing voltage
State signal and current temporary state signal；The manager is for handling voltage transient signal and current temporary state signal.
4. the pilot system of switching 10kV shunt reactors switching overvoltage braking measure as described in claim 1, feature
It is：The system also includes the control of braking measure, and the control of the braking measure includes selecting, taking shelter from the thunder for breaker operating mode
Device installation site and rc absorber installation site；
The selection of the breaker operating mode has breaker phase selection pattern wiring and the non-phase selection pattern wiring of breaker；
The installation site of the arrester is respectively cable head at shunt reactor, cable end piece, use of standing at shunt reactor
At change at the head end of cable and station change cable end；
The installation site of the rc absorber is respectively cable head at shunt reactor, cable end piece at shunt reactor,
The end stood with cable at the head end of cable at change and station change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721784337.1U CN207650299U (en) | 2017-12-19 | 2017-12-19 | The pilot system of switching 10kV shunt reactor switching overvoltage braking measures |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721784337.1U CN207650299U (en) | 2017-12-19 | 2017-12-19 | The pilot system of switching 10kV shunt reactor switching overvoltage braking measures |
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| Publication Number | Publication Date |
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| CN207650299U true CN207650299U (en) | 2018-07-24 |
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| CN201721784337.1U Expired - Fee Related CN207650299U (en) | 2017-12-19 | 2017-12-19 | The pilot system of switching 10kV shunt reactor switching overvoltage braking measures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431158A (en) * | 2020-04-23 | 2020-07-17 | 佛山科学技术学院 | Overvoltage combined suppression system and device of vacuum circuit breaker |
| CN112345817A (en) * | 2020-11-16 | 2021-02-09 | 国网吉林省电力有限公司电力科学研究院 | Overvoltage test circuit and method for SF6 circuit breaker switching dry-type air-core reactor |
-
2017
- 2017-12-19 CN CN201721784337.1U patent/CN207650299U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431158A (en) * | 2020-04-23 | 2020-07-17 | 佛山科学技术学院 | Overvoltage combined suppression system and device of vacuum circuit breaker |
| CN111431158B (en) * | 2020-04-23 | 2021-11-05 | 佛山科学技术学院 | Overvoltage combined suppression system and device of vacuum circuit breaker |
| CN112345817A (en) * | 2020-11-16 | 2021-02-09 | 国网吉林省电力有限公司电力科学研究院 | Overvoltage test circuit and method for SF6 circuit breaker switching dry-type air-core reactor |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 Termination date: 20181219 |