CN106711945B - A kind of blocking device and diagnostic method of tape jam diagnostic function - Google Patents
A kind of blocking device and diagnostic method of tape jam diagnostic function Download PDFInfo
- Publication number
- CN106711945B CN106711945B CN201610914566.4A CN201610914566A CN106711945B CN 106711945 B CN106711945 B CN 106711945B CN 201610914566 A CN201610914566 A CN 201610914566A CN 106711945 B CN106711945 B CN 106711945B
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- diagnostic
- switch
- thyristor
- blocking device
- power supply
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 23
- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 10
- 230000003139 buffering effect Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 16
- 238000003745 diagnosis Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000007935 neutral effect Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of blocking devices and diagnostic method of tape jam diagnostic function; including DC isolation device and diagnostic device, wherein DC isolation device includes rectifier bridge, thyristor protection circuit, the current-limiting inductance L of block capacitor C, quick-make switch QF, diode D1 D4 compositions；It further include diagnostic device, diagnostic device includes DC power supply, DC power supply includes rectification module, input contactless contactor SY, output contactor switch KM, the exchange side of rectification module is connected to after its corresponding coils from parallel connection of coils by first switch K, further include load resistance R and buffering capacitance C, when diagnosis, DC power supply is to thyristor on-load voltage, judge thyristor, high-speed switch, DC power supply whether failure, it being capable of failure present in discovery system in time, start the protection circuit of DC isolation device when a failure occurs, equipment is prevented to be damaged, and isolated DC device is periodically detected automatically.
Description
Technical field
The invention belongs to high voltage power transmission field, more particularly to the blocking device of a kind of tape jam diagnostic function and diagnosis side
Method.
Background technology
For extra-high voltage direct-current transmission when DC power transmission line monopole the earth is run, the DC current of generation can be by nearby becoming
Station service transformer neutral point enters AC system, and therefore leads to transformer magnetic saturation, serious to influence power grid security.
Above-mentioned phenomenon occurs in order to prevent, and the method for substation's generally use DC isolation device access transformer neutral point is straight to realize
Stream isolation.
Currently, being generally condenser type using more DC isolation device, i.e., by transformer neutral point and the earth
Between series connection access capacitance, come isolated DC electric current entrance.DC isolation device is commonly designed there are one circuit is protected, and is used for
When transformer fault, neutral point can access rapidly the earth, to prevent neutral point voltage excessively high, equipment be caused to endanger.Due to protecting
Protection circuit is relatively high to failure response speed requirement, therefore is typically designed including two parts：Fast combination switch and thyristor protection
Circuit, respectively access in parallel with isolation capacitance.When transformer neutral point overtension, thyristor protection circuit is connected rapidly, prison
Control device issues control command simultaneously, is closed fast combination switch.After quick-make switch is closed, since thyristor circuit both ends do not have
Voltage, thyristor are no longer turned on.Entire isolating device enters neutral point metallic ground pattern by quick-make switch.Equipment is long-term
When operation, if key components are not checked with monitoring, once transformer fault, neutral point cannot access the earth in time, then
Serious consequence may be will produce.
Invention content
The purpose of the present invention is to provide a kind of blocking devices and diagnostic method of tape jam diagnostic function, existing for solving
Have in technology and diagnosis not to be carried out to DC isolation device and the problem of monitoring causes serious consequence.
To achieve the above object, the technical scheme is that：
A kind of blocking device of tape jam diagnostic function, including blocking device, the blocking device include capacitance, open
Pass, rectifier bridge, current-limiting inductance, thyristor protection circuit, capacitance are connect with switch in parallel, capacitance both ends and rectifier bridge
Input terminal connects, and rectification bridge output end connects protective loop, and the protective loop includes concatenated current-limiting inductance and thyristor, is gone back
Including diagnostic device, the diagnostic device includes the DC power supply of periodically output DC voltage, the output end of the DC power supply
It is in parallel with the rectification bridge output end.
Further, the DC power supply includes rectification module, and the rectification module exchange side is connected with input contactor
Switch, DC side are connected with output contactor switch, input contactless contactor and output contactor switchs corresponding coils from parallel connection of coils
The exchange side of rectification module is connected to by first switch afterwards, the DC side of rectification module is also in series with load resistance, is parallel with
Buffer capacitance.
The present invention also provides a kind of blocking device diagnostic methods, and in a controlling cycle, method scheme one includes such as
Lower step：
1) DC voltage is loaded to rectification bridge output end；
2) in the first setting time, if detect that thyristor loop current is less than setting value, it is determined as thyristor
Failure.
Method scheme two, on the basis of method scheme one, if thyristor circuit is normal, in the second setting time, such as
Quick-make switch combined floodgate is not detected in fruit, then is determined as quick-make switch failure.
Method scheme three, on the basis of method scheme one, if contactor is closed the time for reaching third setting, if inspection
It measures thyristor both end voltage and is less than setting value, be then determined as DC power supplier failure.
Method scheme four, method scheme five, method scheme six are corresponding in method scheme one or method scheme two or method
On the basis of scheme three, after detection is out of order, alarm.
The beneficial effects of the invention are as follows：
In equipment longtime running, voltage is applied to thyristor circuit by DC power supply, to the device of DC isolation device
Part is detected, can failure present in discovery system in time, start the protection electricity of DC isolation device when a failure occurs
Road prevents equipment to be damaged, and is periodically detected automatically to isolated DC device.
Description of the drawings
Fig. 1 is the circuit connection diagram of DC isolation device diagnostic device；
Fig. 2 is the circuit connection diagram of the equipment placed separately of tape jam diagnostic function；
Fig. 3 is DC isolation device diagnostic device flow chart.
Specific implementation mode
Below in conjunction with the accompanying drawings to the further details of explanation of specific implementation mode of the present invention：
A kind of embodiment of the blocking device of tape jam diagnostic function of the present invention：
A kind of blocking device of tape jam diagnostic function, specifically as shown in Fig. 2, DC isolation device includes capacitance
Rectifier bridge, thyristor protection circuit, the current-limiting inductance L, capacitance C of device C, quick-make switch QF, diode D1-D4 compositions
Be connected in parallel with quick-make switch QF, the both ends of quick-make switch QF are connect with rectifier bridge input terminal, protective loop with it is whole
Stream bridge output end is connected in series with, and protective loop includes current-limiting inductance L and T1, T2 thyristor in parallel, and rectification bridge output end also connects
It is connected to DC power supply；Further include diagnostic device, diagnostic device includes DC power supply, and DC power supply includes rectification module, rectification mould
Block exchange side is connected with input contactless contactor SY, and DC side is connected with output contactor switch KM, input contactless contactor SY
The exchange side of rectification module is connected to after coil SY and KM parallel connection corresponding with output contactor switch KM by first switch K,
The DC side of rectification module is also associated with load resistance R and is parallel with buffering capacitance C, specifically as shown in Figure 1.
The control system of DC isolation device controls contactless contactor SY and KM, and is examined by set-up of control system
In the disconnected period, after equipment investment operation, at regular intervals, diagnostic device is on-line automatic to be detected diagnosis, contactless contactor SY
After being closed with KM, DC power supply institute making alive causes to bypass thyristor protection action, and then is closed in parallel with capacitance C fast
Fast closure switch QF monitors the voltage at the both ends capacitance C in the process, and breakdown judge, control system are carried out according to voltage
Diagnostic workflow figure, specifically as shown in figure 3, diagnostic method includes the following steps：
1, control system control SY, KM are closed, and DC power supplier starts to charge to capacitance C.
2, when system monitoring is greater than the set value V1 to thyristor both end voltage, trigger pulse is sent out, conducting thyristor, together
When control fast combination switch QF and be closed, start T1 timing, V1 is a variable element in equipment operation, can be arranged, be transported with equipment
Row environment is related, and general setting is more than 400V.
3, after control system sends out trigger command, within the first time of setting, i.e., send out 1 millisecond of trigger command it
Interior, detection thyristor loop current is less than 500A, then is determined as that thyristor loop fault, control are closed QF, generates alarm.
If 4, thyristor circuit is normal, within the second time of setting, that is, the time T1 of timing after trigger command is sent out
More than the setting value of timing time, fast combination switch is not detected and closes a floodgate, then is determined as fast combination switch failure, generates warning message,
It is simultaneously emitted by QF close commands.
5, control SY, KM closures reach third setting time, that is, control SY, KM closure and reach 10 seconds, detect thyristor
When both end voltage is less than setting value V2, V2 is generally higher than 200V, then is determined as DC power supplier failure, generates warning message；
If 6, detection is all normal, controls fast combination switch and disconnect, detection terminates, and system continues to run with.
Here it is brilliant due in trigger command 1ms at the time of the first setting time is for determining detection thyristor current flows
Brake tube electric current should reach higher level, and therefore, the first setting time here can take the 1ms after sending out trigger command, i.e., from
Send out the time that trigger command starts timing.It is of course also possible to be converted to the timing since diagnostic device loads DC voltage
Time.
Here the second setting time can take send out trigger command after timing time T1 be more than timing time setting
Value, the time T1 that can also be converted to the timing since diagnostic device loads DC voltage are more than from diagnostic device load direct current
The setting value for the timing time that voltage starts.
As other embodiment, above step 1-5 can be adjusted and be deformed.
By detecting above, it can more accurately be diagnosed to be blocking device thyristor circuit, fast combination switch and be used for
The DC power supplier of diagnosis whether failure.After detection is out of order, DC isolation device becomes transformer neutral point metallic ground
Pattern, and according to fault condition, respective handling is made, effectively avoid the operation hidden danger brought by key components failure.
As an implementation, diagnostic device use blocking device itself control system, detect electric current, voltage, soon
The closure of fast closure switch and shutdown, DC power supply whether failure, realize diagnosis to blocking diagnostic device.
As other embodiment, diagnostic device can also be arranged solely in addition to the control system using blocking device itself
Vertical control system, the control system can by increased detection electric current, voltage, the closure of quick-make switch and shutdown,
DC power supply whether realize by the device of failure, then carry out judging thyristor, high-speed switch, DC power supply whether failure, may be used also
By the communication with blocking device control system itself, to obtain the data of above-mentioned electric current, voltage, with judge thyristor, quickly
Switch, DC power supply whether failure.
In order to which property performance period controls, such as shown in Fig. 1, it is only necessary to which switch KM is designed as being controlled by the control of diagnostic device
System is periodically controlled closure and the shutdown of switch KM by the control system of diagnostic device.
Claims (5)
1. a kind of blocking device of tape jam diagnostic function, including blocking device, the blocking device includes capacitance, fast conjunction
Switch, rectifier bridge, current-limiting inductance, thyristor protection circuit, capacitance are connected in parallel with fast combination switch, capacitance both ends with
Rectifier bridge input terminal connects, and rectification bridge output end connects protective loop, and the protective loop includes concatenated current-limiting inductance and crystalline substance
Brake tube, which is characterized in that further include diagnostic device, the diagnostic device includes the DC power supply of periodically output DC voltage,
The output end of the DC power supply is in parallel with the rectification bridge output end, and the DC power supply includes rectification module, the rectification mould
Block exchange side is connected with input contactless contactor, and DC side is connected with output contactor switch, inputs contactless contactor and output
The exchange side of rectification module, the DC side of rectification module are connected to after the corresponding coils from parallel connection of coils of contactless contactor by first switch
It is also in series with load resistance, is parallel with buffering capacitance.
2. a kind of blocking device diagnostic method, which is characterized in that in a controlling cycle, steps are as follows：
1) DC voltage is loaded to rectification bridge output end；
2) in the first setting time, if detect that thyristor loop current is less than setting value, it is determined as transistors breakdown.
3. blocking device diagnostic method according to claim 2, which is characterized in that if thyristor circuit is normal, second
In setting time, closes a floodgate if fast combination switch is not detected, be determined as fast combination switch failure.
4. blocking device diagnostic method according to claim 2, which is characterized in that if contactor closure reaches third setting
Time when, if detect thyristor both end voltage be less than setting value, be determined as DC power supplier failure.
5. according to claim 2-4 any one of them blocking device diagnostic methods, which is characterized in that after detection is out of order,
It alarms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914566.4A CN106711945B (en) | 2016-10-19 | 2016-10-19 | A kind of blocking device and diagnostic method of tape jam diagnostic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914566.4A CN106711945B (en) | 2016-10-19 | 2016-10-19 | A kind of blocking device and diagnostic method of tape jam diagnostic function |
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| Publication Number | Publication Date |
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| CN106711945A CN106711945A (en) | 2017-05-24 |
| CN106711945B true CN106711945B (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610914566.4A Active CN106711945B (en) | 2016-10-19 | 2016-10-19 | A kind of blocking device and diagnostic method of tape jam diagnostic function |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378798A (en) * | 2018-12-11 | 2019-02-22 | 西安交通大学 | Transformer neutral point DC isolation device based on jet plasma trigger switch |
| CN112816863A (en) * | 2021-02-05 | 2021-05-18 | 珠海博威电气股份有限公司 | Capacitor power-taking switch with fault diagnosis function and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967957A (en) * | 2006-11-24 | 2007-05-23 | 华中科技大学 | Direct current current-limiting device of neutral point of grounding transformer |
| CN201584755U (en) * | 2009-11-26 | 2010-09-15 | 广州市高澜水技术有限公司 | Current switching-on device for neutral point direct-current blocking equipment of transformer |
| CN202678952U (en) * | 2011-12-30 | 2013-01-16 | 洛阳恒光特种变压器有限公司 | Transformer neutral point DC current suppression device adopting series capacitor method |
| CN103368155A (en) * | 2013-07-09 | 2013-10-23 | 东北电力大学 | Capacitance DC (Direct Current) blocking on-off controllable bridge circuit for inhibiting DC magnetic bias of transformer |
| CN203774759U (en) * | 2013-12-17 | 2014-08-13 | 国家电网公司 | Direct current inhibition apparatus of transformer neutral point |
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN104810793A (en) * | 2015-04-23 | 2015-07-29 | 许继集团有限公司 | Transformer neutral point direct current blocking device |
-
2016
- 2016-10-19 CN CN201610914566.4A patent/CN106711945B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967957A (en) * | 2006-11-24 | 2007-05-23 | 华中科技大学 | Direct current current-limiting device of neutral point of grounding transformer |
| CN201584755U (en) * | 2009-11-26 | 2010-09-15 | 广州市高澜水技术有限公司 | Current switching-on device for neutral point direct-current blocking equipment of transformer |
| CN202678952U (en) * | 2011-12-30 | 2013-01-16 | 洛阳恒光特种变压器有限公司 | Transformer neutral point DC current suppression device adopting series capacitor method |
| CN103368155A (en) * | 2013-07-09 | 2013-10-23 | 东北电力大学 | Capacitance DC (Direct Current) blocking on-off controllable bridge circuit for inhibiting DC magnetic bias of transformer |
| CN203774759U (en) * | 2013-12-17 | 2014-08-13 | 国家电网公司 | Direct current inhibition apparatus of transformer neutral point |
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN104810793A (en) * | 2015-04-23 | 2015-07-29 | 许继集团有限公司 | Transformer neutral point direct current blocking device |
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| Publication number | Publication date |
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| CN106711945A (en) | 2017-05-24 |
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