CN206992693U - Damping resistance synchronous triggering device - Google Patents
Damping resistance synchronous triggering device Download PDFInfo
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- CN206992693U CN206992693U CN201720952013.8U CN201720952013U CN206992693U CN 206992693 U CN206992693 U CN 206992693U CN 201720952013 U CN201720952013 U CN 201720952013U CN 206992693 U CN206992693 U CN 206992693U
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- damping resistance
- voltage
- switching
- triggering device
- synchronous triggering
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Abstract
The utility model discloses a kind of damping resistance synchronous triggering device, including, trigger module, it is connected with the secondary side of voltage transformer to export trigger signal when voltage reaches activation threshold value, isolated location, described trigger signal is converted into switching signal, execution unit, it is with described damping resistance and connects and the switching of described damping resistance is realized by described switching signal control.The utility model is the new device that damping resistance synchronizes triggering control in blowout coil set apparatus, the synchronization zero-cross triggering to damping resistance can especially be accomplished, and the adjustable setting valve control not influenceed by arc suppression coil body gear, perfection realize arc suppression coil different stalls can same setting valve switching damping resistance, starter, and the setting valve can adjust as needed.
Description
Technical field
Damping resistance triggering switching technical field is the utility model is related to, is synchronously triggered more particularly to a kind of damping resistance
Device.
Background technology
Neutral by arc extinction coil grounding is one of effective ways for administering In the distribution system of low voltage singlephase earth fault, its
In with presetting system adjust circle arc suppression coil be most widely used.Presetting system adjusts circle arc suppression coil to usually require to connect one between the earth
Neutral point displacement voltage is no more than the 15% of phase voltage when individual damping resistance is to ensure power network normal operation, but single-phase connect is occurring
Rapid excision damping resistance is needed to realize effective compensation during earth fault.Traditional method is to utilize the excision resistance of load loaded switch
Buffer resistance, load loaded switch structure bulky and poor reliability；Prior art utilizes cuts from triggering technique driving bidirectional triode thyristor
Except damping resistance.
But the shortcomings that control mode maximum be it is non-adjustable due to nonlinear resistance, during the switching of damping resistance
Machine is that the startup voltage of device is non-constant, but a scattered scope：If the maximum compensation electric current of arc suppression coil is minimum
Compensate 3 times of electric current, then the startup voltage of the control mode also has one 3 times of dispersiveness.I.e. if first grade opens
Dynamic voltage is 20%U φ (U φ are the rated voltage of the phase voltage of the power network, i.e. arc suppression coil), then most high-grade startup voltage
It is up to 60%U φ.This will cause the setting of the startup voltage of arc suppression coil extremely difficult, and can only be according to circumstances
Accept or reject, the compensation effect ultimately resulted in partial gear is very undesirable, and is unfavorable for the reliability service of device.
Moreover, nonlinear resistance, from triggering mode, controllable silicon can not accomplish zero cross fired, each to cross after zero to cut-off all
There is one section of Trigger Angle, and gate leve trigger current size is uncontrollable, trigger current is very big during metallic ground, the high current of this repetition
Strong triggering, can also have an impact to the service life of controllable silicon.
Utility model content
The purpose of this utility model is to be directed to technological deficiency present in prior art, and it is synchronous to provide a kind of damping resistance
Trigger device.
Technical scheme is used by realize the purpose of this utility model：
A kind of damping resistance synchronous triggering device, including,
Trigger module, it is connected with the secondary side of voltage transformer to export triggering letter when voltage reaches activation threshold value
Number,
Isolated location, described trigger signal is converted into switching signal,
Execution unit, it is with described damping resistance and connects and described damping electricity is realized by described switching signal control
The switching of resistance.
Described trigger module includes the rectification unit being connected with the secondary side of described voltage transformer, and switch
Pipe, the base stage of described switching tube are connected through voltage-type switching device with two hair time side outputs of voltage transformer.
Described isolated location becomes for isolation, the primary side that the isolation described in the collector series connection of described switching tube becomes
Described rectification unit is accessed after coil, described execution unit is controllable silicon.
Described voltage-type switching device is voltage-stabiliser tube or piezo-resistance.
Described isolated location is switching device.
Described isolation is changed into push-pull type isolation and become, and described trigger module includes the switching tube described in two.
A kind of triggering method of described damping resistance synchronous triggering device, it is characterised in that comprise the following steps,
1) trigger signal, described triggering are exported when the voltage of voltage transformer secondary side exceedes described activation threshold value
Signal is trigger voltage or trigger current；
2) isolated location receives described trigger signal and generates switching signal, described switching signal be switching voltage or
Switching current；
3) execution unit receives and damping resistance is switched into short-circuit condition from switching state after switching signal；
4) when secondary side voltage is less than threshold value, execution unit cuts damping resistance from short-circuit condition after losing switching signal
It is changed to switching state.
Compared with prior art, the beneficial effects of the utility model are：
The utility model is the new device that damping resistance synchronizes triggering control in blowout coil set apparatus, especially
It is that can accomplish the synchronization zero-cross triggering to damping resistance, and the adjustable setting valve control not influenceed by arc suppression coil body gear
System, perfection realize arc suppression coil different stalls can same setting valve switching damping resistance, starter, and the setting valve can be with
Adjustment as needed.
Brief description of the drawings
Fig. 1 show the structural representation of damping resistance synchronous triggering device of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description only to explain the utility model, is not used to limit the utility model.
As shown in figure 1, damping resistance synchronous triggering device of the present utility model, including,
Trigger module, it is connected with the secondary side of voltage transformer to export triggering letter when voltage reaches activation threshold value
Number, described trigger signal is trigger voltage or trigger current；
Isolated location, described trigger signal is converted into switching signal, described switching signal is switching voltage
Or switching current；
Execution unit, it is with described damping resistance and connects and described damping electricity is realized by described switching signal control
The switching of resistance, described switching refer to switch damping resistance between short-circuit condition and switching state.
The utility model voltage transformer (extinguishing arc pt) is used as source signal, is working power by its secondary side voltage, then pass through
Cross isolated location and isolate a sub-high pressure, it is possible to achieve the control device does not need external control power supply, accomplishes a sub-high pressure and control
The electrical isolation of power supply processed, ensure that in the case where controlling dead electricity the control device still can normal switching damping resistance,
Starter, that is, the analog signal for realizing secondary side voltage directly trigger, and avoid the problem of high-low pressure mixes；Principle and
Structure is all simpler, relatively reliable.
As one of which embodiment, described trigger module includes the secondary side with described voltage transformer
The rectification unit of connection, such as bridge full-wave rectifier unit, and switching tube, the base stage of described switching tube is through voltage-type derailing switch
Part is connected with the secondary side output of voltage transformer, and described isolated location becomes for isolation, the colelctor electrode string of described switching tube
The positive pole of described rectification unit is accessed after the coil for the primary side that isolation described in connecing becomes, described execution unit is controllable
Silicon.Described voltage-type switching tube is voltage-stabiliser tube.Voltage-stabiliser tube is the switching device of whole trigger device, and its voltage stabilizing value is according to device
Startup voltage setting valve choose.When U0 voltages, which are more than, starts voltage (setting valve), that is, exceed the voltage stabilizing value of voltage-stabiliser tube,
Voltage-stabiliser tube is breakdown, and switching tube conducting, isolation, which becomes primary side, input, has output current to form switching signal to secondary, you can
To trigger controllable silicon, switching damping resistance.
The negative pole of rectification unit described in the emitter stage access of described switching tube.The main function of isolating transformer is to make
Primary side and secondary side it is electric completely insulated, also isolate the loop.In addition, utilize the big spy of the high-frequency loss of its iron core
Point, control loop is passed to so as to suppress high frequency spurs.
Because trigger signal is extinguishing arc pt secondary voltages, and in primary circuit arc suppression coil (big inductance) presence, inductance
Current hysteresis lags behind neutral point voltage after voltage, i.e. damping resistance both end voltage, is eventually exhibited as the trigger signal of controllable silicon
About 80 degree of its main circuit voltage model is ahead of, and the element no-voltage delay used in the present apparatus, therefore the control device can
With synchronization of the realization to damping resistance, zero cross fired.So can fundamentally solve because the switching opportunity of damping resistance is different
Caused by secondary transient state, the compensation effect of arc suppression coil can be greatly improved.
Preferably, described isolation is changed into push-pull type isolation change, and described trigger module includes the switching tube described in two
And voltage-stabiliser tube.Push-pull type isolation becomes while electrical isolation is realized, solves transformation caused by the direct current signal after full-wave rectification
The problem of device saturation, the output of two-pack side be in order to and meanwhile meet the triggering of positive and negative two controllable silicons.
Certainly, it can also use piezo-resistance to replace described voltage-stabiliser tube, realize that voltage is isolated using pulse transformer,
Realize the purpose of this utility model.
Specifically, the bridge-type that the access of voltage transformer secondary side coil both ends is made up of diode D9, D10, D11 and D12
Full-wave rectifying circuit, while respectively and it is connected to switching tube Q1 and Q2, switching tube Q1 at the second siding ring both ends of inductance transformer
Base stage one end of second siding ring is accessed after voltage-stabiliser tube D3, current-limiting resistance R1 and diode D1, described switching tube Q1's
Colelctor electrode access push-pull type isolation becomes an input of TR1 primary sides, and colelctor electrode accesses the negative pole of full wave rectifying unit；Switch
Pipe Q2 base stage accesses the other end of described two level lateral coil after voltage-stabiliser tube D5, current-limiting resistance R2 and diode D2, described
Switching tube Q2 colelctor electrode access push-pull type isolation become primary side another input, colelctor electrode access full wave rectifying unit
Negative pole, described push-pull type isolation become TR1 primary side among access full wave rectifying unit positive pole, described push-pull type
Isolate the secondary side become into two-pack side, diode D5 of the one end through concatenation, resistance R3 and the resistance R5 of one of secondary coil
Lead-out terminal 5 is accessed, the other end is directly accessed lead-out terminal 4, between described resistance R3 and resistance R5 between lead-out terminal 4 simultaneously
It is connected to voltage-stabiliser tube D7, diode D6 of the one end through concatenation, resistance R4 and resistance R8 the access output end of another secondary coil
Son 6, the other end is directly accessed lead-out terminal 7, and between lead-out terminal 7 and voltage-stabiliser tube is connected between described resistance R4 and resistance R8
D8, each lead-out terminal 4,5,6,7 accordingly access bidirectional triode thyristor 1T input terminal 4,5,6 and 7, described bidirectional triode thyristor
1T and damping resistance R simultaneously connects.
Signal the front and rear design for adding up to four voltage-stabiliser tubes, can be effectively ensured with clamped voltage by voltage-stabiliser tube D7 and D8
Stability, the size of trigger current is limited by R5 and R8, protect controllable silicon gate leve, input terminal 4, the and of terminal 5 of controllable silicon
Terminal 6, terminal 7 are the trigger circuit of positive and negative controllable silicon respectively.Two groups of circuits are identical, but connection is just on the contrary, pass through isolation
Become the Same Name of Ends that two-pack becomes to realize so that two groups of output phases are just on the contrary, control the triggering of positive and negative two pipes respectively.I.e.
Trigger control device of the present utility model is the standalone module without external power supply, and output is exactly to control the triggering of controllable silicon, without it
He controls output.
The triggering method of described damping resistance synchronous triggering device, comprises the following steps,
1) trigger signal, described triggering are exported when the voltage of voltage transformer secondary side exceedes described activation threshold value
Signal is trigger voltage or trigger current；
2) isolated location receives described trigger signal and generates switching signal, described switching signal be switching voltage or
Switching current；
3) execution unit receives and damping resistance is switched into short-circuit condition from switching state after switching signal.
4) when secondary side voltage is less than threshold value, execution unit cuts damping resistance from short-circuit condition after losing switching signal
It is changed to switching state.
Solve the problems, such as that nonlinear resistance starts distribution of voltage from trigger method, realize adjustable setting control and touch
Thyristor throw-cut damping resistance is sent out, and optimal switching effect can be realized with synchronization zero-cross switching.And program global design is skilful
Wonderful, after optimization, component is few, small volume, and without consumable accessory, it is ensured that the device is run reliably and with long-term.
Described above is only preferred embodiment of the present utility model, it is noted that for the general of the art
For logical technical staff, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as the scope of protection of the utility model.
Claims (6)
- A kind of 1. damping resistance synchronous triggering device, it is characterised in that including,Trigger module, it is connected with the secondary side of voltage transformer to export trigger signal when voltage reaches activation threshold value,Isolated location, described trigger signal is converted into switching signal,Execution unit, it is with described damping resistance and connects and is realized described damping resistance by described switching signal control Switching.
- 2. damping resistance synchronous triggering device as claimed in claim 1, it is characterised in that described trigger module includes and institute The rectification unit of the secondary side connection for the voltage transformer stated, and switching tube, the base stage of described switching tube are opened through voltage-type Device is closed with two hair time side outputs of voltage transformer to be connected.
- 3. damping resistance synchronous triggering device as claimed in claim 2, it is characterised in that described isolated location is isolation Become, described rectification unit, institute are accessed after the coil for the primary side that the isolation described in the collector series connection of described switching tube becomes The execution unit stated is controllable silicon.
- 4. damping resistance synchronous triggering device as claimed in claim 2, it is characterised in that described voltage-type switching device is Voltage-stabiliser tube or piezo-resistance.
- 5. damping resistance synchronous triggering device as claimed in claim 2, it is characterised in that described isolated location is derailing switch Part.
- 6. damping resistance synchronous triggering device as claimed in claim 3, it is characterised in that described isolation be changed into push-pull type every From change, described trigger module includes the switching tube described in two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720952013.8U CN206992693U (en) | 2017-07-31 | 2017-07-31 | Damping resistance synchronous triggering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720952013.8U CN206992693U (en) | 2017-07-31 | 2017-07-31 | Damping resistance synchronous triggering device |
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| CN206992693U true CN206992693U (en) | 2018-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196286A (en) * | 2017-07-31 | 2017-09-22 | 天津市天变航博电气发展有限公司 | Damping resistance synchronous triggering device and triggering method |
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2017
- 2017-07-31 CN CN201720952013.8U patent/CN206992693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196286A (en) * | 2017-07-31 | 2017-09-22 | 天津市天变航博电气发展有限公司 | Damping resistance synchronous triggering device and triggering method |
| CN107196286B (en) * | 2017-07-31 | 2019-07-26 | 天津市天变航博电气发展有限公司 | Damping resistance synchronous triggering device and triggering method |
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