CN106711945A - Direct current blocking equipment with fault diagnosis function and diagnosis method - Google Patents
Direct current blocking equipment with fault diagnosis function and diagnosis method Download PDFInfo
- Publication number
- CN106711945A CN106711945A CN201610914566.4A CN201610914566A CN106711945A CN 106711945 A CN106711945 A CN 106711945A CN 201610914566 A CN201610914566 A CN 201610914566A CN 106711945 A CN106711945 A CN 106711945A
- Authority
- CN
- China
- Prior art keywords
- direct current
- blocking device
- switch
- equipment
- current blocking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses direct current blocking equipment with a fault diagnosis function and a diagnosis method. The equipment comprises a direct current blocking device and diagnosis equipment, wherein the direct current blocking device comprises a direct current blocking capacitor C, a fast closing switch QF, a rectifier bridge formed by diodes D1 to D4, a thyristor protection loop and a current limiting inductor L, and the equipment also comprises the diagnosis equipment; the diagnosis equipment comprises a direct current power supply; the direct current power supply comprises a rectification module, an input contact switch SY and an output contact switch KM; after being connected in parallel, a corresponding coil is connected to the alternating current side of the rectification module through a first switch K; the direct current blocking equipment also comprises a load resistor R and a buffer capacitor C; during the diagnosis, the direct current power supply loads voltage on a thyristor; whether the thyristor, the fast switch and the direct current power supply have fault or not is judged; a fault in the system can be discovered in time; when a fault occurs, a protection circuit of the direct current blocking device is started; the equipment is prevented from being damaged; the direct current blocking device is periodically and automatically detected.
Description
Technical field
The invention belongs to high voltage power transmission field, the blocking device of more particularly to a kind of tape jam diagnostic function and diagnosis side
Method.
Background technology
, when DC power transmission line monopole the earth runs, the DC current of generation can be by change nearby for extra-high voltage direct-current transmission
Station service transformer neutral point enters AC system, and therefore causes transformer magnetic saturation, and serious may influence power grid security.
In order to prevent above-mentioned phenomenon from occurring, the method that transformer station generally accesses transformer neutral point using DC-isolation device is straight to realize
Stream isolation.
At present, condenser type is generally using more DC-isolation devices, i.e., by transformer neutral point and the earth
Between connect access electric capacity, come isolated DC electric current entrance.DC-isolation device is typically designed with a protection circuit, for
During transformer fault, neutral point can rapidly access the earth, to prevent neutral point voltage too high, cause equipment to endanger.Due to protecting
Protection circuit is higher to failure response speed requirement, therefore is typically designed including two parts：Fast combination switch and thyristor protection
Circuit, it is in parallel with isolation capacitance respectively to access.During transformer neutral point overtension, thyristor protection circuit is turned on rapidly, prison
Control device issues control command simultaneously, closes fast combination switch.After quick-make switch closure, because IGCT loop two ends do not have
Voltage, IGCT is no longer turned on.Whole isolating device enters neutral point metallic ground pattern by quick-make switch.Equipment is long-term
During operation, if key componentses are not checked with monitoring, once transformer fault, neutral point can not access in time the earth, then
Serious consequence may be produced.
The content of the invention
It is existing for solving it is an object of the invention to provide the blocking device and diagnostic method of a kind of tape jam diagnostic function
Have in technology and DC-isolation device is not diagnosed and monitored the problem for causing 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 loop, capacitance are connected with switch in parallel, capacitance two ends and rectifier bridge
Input is connected, and rectification bridge output end connection protective loop, the protective loop includes the current-limiting inductance and IGCT of series connection, also
Including diagnostic device, the diagnostic device includes periodically exporting the dc source of DC voltage, the output end of the dc source
It is in parallel with the rectification bridge output end.
Further, the dc source includes rectification module, and the rectification module AC is connected with input contactor
Switch, DC side is connected with output contactor switch, and input contactless contactor and output contactor switch corresponding coils from parallel connection of coils
The AC 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
Buffering electric capacity.
Present invention also offers a kind of blocking device diagnostic method, in a controlling cycle, method scheme one is included such as
Lower step：
1) DC voltage is loaded to rectification bridge output end；
2) in the first setting time, if detect IGCT loop current less than setting value, it is judged to IGCT
Failure.
Method scheme two, on the basis of method scheme one, if IGCT loop is normal, in the second setting time, such as
Fruit is not detected by quick-make switch combined floodgate, then be judged to quick-make switch failure.
Method scheme three, on the basis of method scheme one, if contactor closure reaches the time of the 3rd setting, if inspection
IGCT both end voltage is measured less than setting value, is then judged to DC power supplier failure.
Method scheme four, method scheme five, method scheme six is corresponding in method scheme one or method scheme two or method
On the basis of scheme three, after detection is out of order, alarmed.
The beneficial effects of the invention are as follows：
In equipment longtime running, by dc source to IGCT loop applied voltage, to the device of DC-isolation device
Part detected, can failure present in discovery system in time, the protection electricity of DC-isolation device is started when a failure occurs
Road, prevents equipment from suffering damage, and isolated DC device is periodically detected automatically.
Brief 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 embodiment
Below in conjunction with the accompanying drawings to the further details of explanation of specific embodiment of the invention：
A kind of embodiment of the blocking device of tape jam diagnostic function of the invention：
A kind of blocking device of tape jam diagnostic function, it is specific as shown in Fig. 2 DC-isolation device includes capacitance
Device C, quick-make switch QF, rectifier bridge, thyristor protection loop, the current-limiting inductance L of diode D1-D4 compositions, capacitance C
Be connected in parallel with quick-make switch QF, the two ends of quick-make switch QF are connected with rectifier bridge input, protective loop with it is whole
Stream bridge output end is connected in series, and protective loop includes T1, T2 IGCT of current-limiting inductance L and parallel connection, and rectification bridge output end also connects
It is connected to dc source；Also include diagnostic device, diagnostic device includes dc source, and dc source includes rectification module, rectification mould
Block AC is connected with input contactless contactor SY, and DC side is connected with output contactor switch KM, input contactless contactor SY
The AC of rectification module is connected to after coil SY and KM parallel connections 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 electric capacity C, specifically as shown in Figure 1.
The control system of DC-isolation device is controlled to contactless contactor SY and KM, and is examined by set-up of control system
In the disconnected cycle, after equipment investment operation, at regular intervals, diagnostic device is on-line automatic to carry out checkout and diagnosis, contactless contactor SY
After KM closures, dc source institute making alive causes bypass thyristor protection to act, and then closes in parallel with capacitance C fast
Fast closure switch QF, monitors the voltage at capacitance C two ends in the process, and breakdown judge, control system are carried out according to voltage
Diagnostic workflow figure, it is specific as shown in figure 3, diagnostic method is comprised the following steps：
1st, control system control SY, KM closures, DC power supplier starts to charge electric capacity C.
2nd, when system monitoring to IGCT both end voltage is more than setting value V1, trigger pulse is sent, conducting thyristor, together
When control fast combination switch QF to close, start T1 timing, V1 is a variable element in equipment operation, can be set, with equipment fortune
Row environment is relevant, and general setting is more than 400V.
3rd, after control system sends trigger command, setting the very first time in, i.e., send 1 millisecond of trigger command it
Interior, detection IGCT loop current is less than 500A, then be judged to IGCT loop fault, and control closure QF produces alarm.
If the 4, IGCT loop is normal, within the second time of setting, that is, the time T1 of timing after trigger command is sent
More than the setting value of timing time, it is not detected by fast combination switch and closes a floodgate, be then judged to fast combination switch failure, produces warning message,
It is simultaneously emitted by QF close commands.
5th, control SY, KM closures reach the 3rd setting time, that is, control SY, KM closure to reach 10 seconds, detect IGCT
When both end voltage is less than setting value V2, V2 is generally higher than 200V, then be judged to DC power supplier failure, produces warning message；
If the 6, detection is all normal, fast combination switch is controlled to disconnect, detection terminates, and system is continued to run with.
Here the first setting time is the moment for determining detection thyristor current flows, brilliant due in trigger command 1ms
Brake tube electric current should reach higher level, therefore, the first setting time here can take the 1ms after sending trigger command, i.e., from
Send the time that trigger command starts timing.It is of course also possible to be converted to the timing since diagnostic device loading DC voltage
Time.
Here the second setting time can take and send settings of the time T1 of timing after trigger command more than timing time
Value, it is also possible to which the time T1 of the timing being converted to since diagnostic device loading DC voltage is more than from diagnostic device loading direct current
The setting value of the timing time that voltage starts.
As other embodiment, can to the above the step of 1-5 be adjusted and deform.
Detected more than, can more accurately be diagnosed to be blocking device IGCT loop, fast combination switch and be used for
The DC power supplier of diagnosis whether failure.After detection is out of order, DC-isolation device is changed into transformer neutral point metallic ground
Pattern, and according to failure situation, respective handling is made, effectively avoid because of the operation hidden danger that key componentses failure is brought.
Used as a kind of implementation method, diagnostic device uses blocking device control system in itself, detects electric current, voltage, soon
The closure of fast closure switch and shut-off, dc source whether failure, realize the diagnosis to blocking diagnostic device.
Used as other embodiment, diagnostic device can also be set solely except the control system using blocking device in itself
Vertical control system, the control system can be by increased detection electric current, voltage, closure and the shut-off of quick-make switch,
Whether dc source realize by the device of failure, then carry out judging IGCT, high-speed switch, dc source whether failure, may be used also
By the communication with blocking device control system in itself, to obtain above-mentioned electric current, the data of voltage, to judge IGCT, quick
Switch, dc source whether failure.
In order to property performance period is controlled, such as shown in Fig. 1, it is only necessary to switch the control that KM is designed as being controlled by diagnostic device
System, by closure and the shut-off of the periodic controlling switch KM of the control system of diagnostic device.
Claims (6)
1. a kind of blocking device of tape jam diagnostic function, including blocking device, the blocking device includes capacitance, opens
Pass, rectifier bridge, current-limiting inductance, thyristor protection loop, capacitance are connected with switch in parallel, capacitance two ends and rectifier bridge
Input is connected, and rectification bridge output end connection protective loop, the protective loop includes the current-limiting inductance and IGCT of series connection, its
It is characterised by, also including diagnostic device, the diagnostic device includes periodically exporting the dc source of DC voltage, the direct current
The output end in source is in parallel with the rectification bridge output end.
2. the blocking device of tape jam diagnostic function according to claim 1, it is characterised in that the dc source includes
Rectification module, the rectification module AC is connected with input contactless contactor, and DC side is connected with output contactor switch, defeated
Enter after contactless contactor switchs corresponding coils from parallel connection of coils with output contactor and exchanging for rectification module is connected to by first switch
Side, the DC side of rectification module is also in series with load resistance, is parallel with buffering electric capacity.
3. a kind of blocking device diagnostic method, it is characterised in that in a controlling cycle, step is as follows：
1) DC voltage is loaded to rectification bridge output end；
2) in the first setting time, if detect IGCT loop current less than setting value, it is judged to transistors breakdown.
4. blocking device diagnostic method according to claim 3, it is characterised in that if IGCT loop is normal, second
In setting time, if be not detected by fast combination switch closed a floodgate, it is judged to fast combination switch failure.
5. blocking device diagnostic method according to claim 3, it is characterised in that if contactor closure reaches the 3rd setting
Time when, if detecting IGCT both end voltage less than setting value, be judged to DC power supplier failure.
6. the blocking device diagnostic method according to claim any one of 3-5, it is characterised in that after detection is out of order,
Alarmed.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106711945A true CN106711945A (en) | 2017-05-24 |
| CN106711945B CN106711945B (en) | 2018-10-19 |
Family
ID=58940366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610914566.4A Active CN106711945B (en) | 2016-10-19 | 2016-10-19 | A kind of blocking device and diagnostic method of tape jam diagnostic function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106711945B (en) |
Cited By (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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106711945B (en) | 2018-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9007735B2 (en) | Fault detection, isolation, location and reconnection systems and methods | |
| CN205681098U (en) | Three pole earth leakage protective devices | |
| US9673695B1 (en) | System and method for intelligent circuit breaking in adjustable speed drives | |
| CN105259460B (en) | Electric leakage decision circuit for leakage circuit breakers | |
| US9998060B2 (en) | System and method for capacitor fault energy interruption in adjustable speed drives | |
| KR101050605B1 (en) | Reclosing control system considering superconducting fault current limiter and its control method | |
| CN102077433B (en) | Circuit breaker with improved re-closing functionality | |
| CN103244447A (en) | Fault detection circuit and method for accurately detecting running conditions of alternating current fan | |
| US8018235B2 (en) | Methods and apparatus to facilitate ground fault detection with a single coil and an oscillator | |
| CN103261900B (en) | The method that the ground short circuit of the supply lines of the one-sided power supply of three phase supply net is monitored and electrical protection apparatus | |
| US20080106831A1 (en) | Methods and apparatus for continuous ground fault self test | |
| US20180366942A1 (en) | Converters | |
| CN205665378U (en) | Relay adhesion detection circuitry | |
| CN103033695B (en) | The detection method of transformer tolerance DC magnetic biasing ability | |
| CN105514926B (en) | A kind of method to be restored electricity after DC earthing protection starting tripping | |
| CN103560479A (en) | Load circuit fault detection circuit and method applied to breaker reclosing | |
| CN106941409A (en) | For being protected the circuit framework influenceed against PoDL breakdown of conducting wires | |
| CN108987073A (en) | Voltage transformer harmonic elimination apparatus and application method | |
| CN106849033B (en) | A kind of optimization method of inverter zero sequence overvoltage protection logic | |
| CN103683276A (en) | An intelligent static state switch, a control system thereof, and a fault monitoring method | |
| CN203522122U (en) | Load line fault detection circuit applied to circuit breaker reclosing | |
| CN106711945B (en) | A kind of blocking device and diagnostic method of tape jam diagnostic function | |
| CN203368336U (en) | Frequency converter | |
| CN106505739A (en) | A kind of control loop with self-checking function | |
| CN106199347B (en) | Fault arc detection method and detection device based on interference fingerprint identification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |