CN203261028U - Arc suppression coil device based on active inverter - Google Patents
Arc suppression coil device based on active inverter Download PDFInfo
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- CN203261028U CN203261028U CN 201320204218 CN201320204218U CN203261028U CN 203261028 U CN203261028 U CN 203261028U CN 201320204218 CN201320204218 CN 201320204218 CN 201320204218 U CN201320204218 U CN 201320204218U CN 203261028 U CN203261028 U CN 203261028U
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- arc suppression
- suppression coil
- active inverter
- intelligent controller
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Abstract
The utility model discloses an arc suppression coil device based on an active inverter and the device is applied to the technical field of power system control. The device comprises an arc suppression coil and an intelligent controller, wherein the arc suppression coil is arranged on a neutral line of a power distribution network, the intelligent controller is arranged in a control room and is used for adjusting compensation current of the arc suppression coil according to the operation state of the power distribution network, and an active inverter used for adjusting the compensation current of the arc suppression coil in real time under the control of the intelligent controller is arranged between the arc suppression coil and the intelligent controller. The arc suppression coil device disclosed by the utility model controls the compensation current of the arc suppression coil to be continuously and steplessly adjusted in a rated current range of 0-100% according to unbalanced voltage, measured in real time, of a power grid. Large-range accurate control is realized, the content of harmonic waves is low, compensation is precise, and operation reliability of the power grid is improved.
Description
Technical field
The utility model relates to a kind of arc suppression coil device, specifically a kind of arc suppression coil device based on active inverter.
Background technology
In China low and medium voltage distribution network system, day by day increase along with net capacity, the fed distance of electrical network prolongs, electric pressure raises gradually, cause the power distribution network ground capacity electric current to increase, in when, in this case single phase ground fault occuring, the electric arc that earthing capacitance current forms in the fault point can not be from horizontal blanking, the overvoltage that indirect arc produces tends to make fault spread, significantly reduce the power system operation reliability, so China low and medium voltage distribution network system often adopts neutral point through the earthing mode of arc suppression coil.When electrical network generation single-phase earthing or instantaneity earth fault, arc suppression coil provides an inductive current, utilizing inductive current and capacitance current phase difference is 180 °, flow compensated is through the capacitance current of fault point, earth current is reduced, also so that the voltage at fault phase ground arc two ends reduces rapidly, reach the purpose of extinguish arcs.Therefore adopt the mode of neutral by arc extinction coil grounding in the low and medium voltage distribution network system; not only can effectively reduce and produce the superpotential probability of arc grounding; effectively suppress power network overvoltage; can also reduce to greatest extent simultaneously the short circuit current of fault point; prevent the heat damage effect that short circuit current produces; the normal operation of protection supply network has safely important effect to guaranteeing power consumption.
Present arc suppression coil in a large amount of neutral ground compensation arrangements that use of power distribution network, its regulative mode mostly is greatly the forms such as turn-adjusting, capacitor tuning type, phase control type, for needs fast compensation with transferring arc suppression coil normal operation phase control type, but because of its high-impedance transformer principle that adopts, short-circuit impedance more than 90% need be arranged between the one secondary winding, the arc suppression coil harmonic current of high short-circuit impedance is larger, filter need to be set, have complex structure, reliability is low, volume is large, cost is high shortcoming.
Chinese patent application number is 200420114635.6 " non-harmonic phase-controlled rapid arc extinction and line selection apparatus ", though do not need Filter Winding, but the second short circuit winding of arc suppression coil has three or four, each short-circuited winding is controlled by the disconnected controllable silicon of full conducting and complete shut-down and the silicon controlled combination of the control angle of flow respectively, circuit element is many, and control is complicated.
The utility model content
It is low that the utility model technical issues that need to address provide a kind of harmonic content, compensates accurate arc suppression coil device.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of arc suppression coil device based on active inverter, comprise being arranged on the arc suppression coil on the power distribution network neutral line and being arranged on the intelligent controller that is used for regulating according to the power distribution network running status arc suppression coil compensation electric current in the control room, also be provided with the active inverter of the arc suppression coil offset current being regulated in real time under intelligent controller control between described arc suppression coil and the intelligent controller.
Further improvement of the utility model is: described active inverter is the single-phase bridge active inverter, each brachium pontis of single-phase bridge active inverter consists of by the insulated gate transistor that is arranged in parallel and fly-wheel diode, and the DC side parallel of described single-phase bridge active inverter is provided with capacitor from electrical network to arc suppression coil that export bucking voltage when ground connection occurs.
Further improvement of the utility model is: described capacitor two ends are arranged in parallel the rectifying device of promising capacitor charging, and the direct current source series winding of described rectifying device connects the non-return diode that is used for isolating, preventing from producing to rectifying device with arc suppression coil the reverse impact electric current.
Further improvement of the utility model is: described rectifying device is a kind of in single-phase rectifier device or the three phase rectifier device.
Further improvement of the utility model is: the voltage rectangular pulse of the output signal of described intelligent controller for adopting the sinusoidal pulse width modulation mode to export.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
A kind of arc suppression coil device based on active inverter, unbalanced power supply voltage according to real-time measurement, control arc suppression coil compensation electric current continuous stepless in 0～100% rated current scope is regulated, realized with a wide range of precise control, harmonic content is low, and compensation is accurately guaranteed the inductive current of fine adjustment arc suppression coil output when system's generation earth fault, reasonably compensate, improved the reliability of operation of power networks.
The angle of flow of insulated gate transistor is regulated between 0 °～180 ° in the active inverter, the equivalent resistance of insulated gate transistor is changed between infinity is to zero, the equivalent sine wave voltage of active inverter output is respective change thereupon, has realized the suitable bucking voltage of active inverter output.
To capacitor charging, when electrical network generation ground capacitor can be exported required bucking voltage immediately, fast response time is eliminated earth fault to rectifying device effectively fast when operation of power networks is normal.
Non-return diode-isolated arc suppression coil and the rectifying device of two series connection have prevented that arc suppression coil from producing the reverse impact electric current and causing the rectifying device overload to damage to rectifying device.
The voltage square pulse that intelligent controller adopts the sinusoidal pulse width modulation mode to export, harmonic content satisfies national standard, does not have the electromagnetic pollution in the electrical network, does not need to add in addition filter circuit, has simplified circuit, has reduced the cost of equipment.
Description of drawings
Fig. 1 is system wiring figure of the present utility model;
Wherein, 1, arc suppression coil, 2, intelligent controller, 3, active inverter, 4, capacitor, 5, rectifying device, 6, non-return diode, 11, windings, 12, secondary winding.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further details:
A kind of arc suppression coil device based on active inverter as shown in Figure 1, comprises arc suppression coil 1, active inverter 3, intelligent controller 2 and rectifying device 5.Arc suppression coil 1 has winding 11 and secondary winding l2, and one time winding 11 is connected in series on the neutral line of power distribution network, and the two ends of secondary winding 12 are connected to the output of active inverter 3.In the present embodiment, one time winding 11 is the winding that is connected in parallel, and secondary winding 12 also is the winding that is connected in parallel.Certainly, winding and secondary winding also can adopt the form of being connected in series.
Rectifying device 5 is connected in parallel on the two ends of capacitor 4, is used to capacitor 4 to charge.The direct current source series winding of rectifying device 5 connects non-return diode 6, is used for isolation arc suppression coil 1 and rectifying device 5, prevents that arc suppression coil 1 from producing impulse current and causing rectifying device 5 overloads to damage.Rectifying device 5 can be the single-phase rectifier device, also can be the three phase rectifier device, and in the present embodiment, rectifying device 5 is single-phase rectifier devices.
When electric power system normally moved, only there was less unbalance voltage in electrical network, and secondary side winding 12 output voltages of arc suppression coil 1 are lower, charged to rated operational voltage by 5 pairs of capacitors 4 of rectifying device.Intelligent controller 2 is according to the compensation principle of setting, by equivalent sine wave voltage that amplitude is lower of time interval controls active inverter 3 outputs of setting, the inductive current of arc suppression coil 1 output is changed, changed the equivalent reactance of arc suppression coil 1, intelligent controller 2 is according to the compensation principle formula, the inductive current that arc suppression transformer need to be exported when calculating the capacitance current of system and system's generation single-phase earthing, and then define the equivalent sine wave voltage that source inventer should be exported, and be converted into corresponding sinusoidal pulse width modulation mode control impuls data and be stored in the intelligent controller 2.
When system's generation single phase ground fault, system's unbalance voltage over the ground rises and transfinites, intelligent controller 2 sends the sinusoidal pulse width modulation signal according to the sinusoidal pulse width modulation mode control impuls data that prestore base stage of insulated gate transistor on each brachium pontis of active inverter 3, the angle of flow of the insulated gate transistor of control active inverter 3 is regulated between 0 °～180 °, make the suitable equivalent sine wave voltage of active inverter 3 outputs, and then the suitable inductive current of control arc suppression coil 1 output carries out effective compensation to the system earth capacitance current.
Claims (5)
1. arc suppression coil device based on active inverter, comprise the arc suppression coil (1) that is arranged on the power distribution network neutral line and be arranged on the intelligent controller (2) that is used for regulating according to the power distribution network running status arc suppression coil (1) offset current in the control room, it is characterized in that: also be provided with the active inverter (3) of arc suppression coil (1) offset current being regulated in real time under intelligent controller (2) control between described arc suppression coil (1) and the intelligent controller (2).
2. a kind of arc suppression coil device based on active inverter according to claim 1, it is characterized in that: described active inverter (3) is the single-phase bridge active inverter, each brachium pontis of single-phase bridge active inverter consists of by the insulated gate transistor that is arranged in parallel and fly-wheel diode, and the DC side parallel of described single-phase bridge active inverter is provided with capacitor (4) from electrical network to arc suppression coil (1) that export bucking voltage when ground connection occurs.
3. a kind of arc suppression coil device based on active inverter according to claim 2, it is characterized in that: described capacitor (4) two ends are arranged in parallel the rectifying device (5) of promising capacitor (4) charging, and the direct current source series winding of described rectifying device (5) connects the non-return diode (6) that is used for isolating with arc suppression coil (1), preventing from producing to rectifying device (5) the reverse impact electric current.
4. a kind of arc suppression coil device based on active inverter according to claim 3 is characterized in that: a kind of in single-phase rectifier device or the three phase rectifier device of described rectifying device (5).
5. according to claim 1 to 4 each described a kind of arc suppression coil devices based on active inverter, it is characterized in that: the voltage rectangular pulse of the output signal of described intelligent controller (2) for adopting the sinusoidal pulse width modulation mode to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320204218 CN203261028U (en) | 2013-04-17 | 2013-04-17 | Arc suppression coil device based on active inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320204218 CN203261028U (en) | 2013-04-17 | 2013-04-17 | Arc suppression coil device based on active inverter |
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| Publication Number | Publication Date |
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| CN203261028U true CN203261028U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320204218 Expired - Lifetime CN203261028U (en) | 2013-04-17 | 2013-04-17 | Arc suppression coil device based on active inverter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362609A (en) * | 2014-10-10 | 2015-02-18 | 许继集团有限公司 | Method for automatically and parallelly operating phase-control arc suppression coils |
| CN105896710A (en) * | 2016-04-18 | 2016-08-24 | 国网山东省电力公司郓城县供电公司 | Emergency power supply device based on inverter technology |
| CN106786471A (en) * | 2015-11-20 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of unidirectional active power compensator of power network neutral point isolated neutral system |
| CN107785884A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
| CN107785883A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
-
2013
- 2013-04-17 CN CN 201320204218 patent/CN203261028U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
| CN104362609A (en) * | 2014-10-10 | 2015-02-18 | 许继集团有限公司 | Method for automatically and parallelly operating phase-control arc suppression coils |
| CN104362609B (en) * | 2014-10-10 | 2017-09-22 | 许继集团有限公司 | Phase-control type arc suppression coil automatic parallel operation method |
| CN106786471A (en) * | 2015-11-20 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of unidirectional active power compensator of power network neutral point isolated neutral system |
| CN105896710A (en) * | 2016-04-18 | 2016-08-24 | 国网山东省电力公司郓城县供电公司 | Emergency power supply device based on inverter technology |
| CN107785884A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
| CN107785883A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |