CN102306933A - Short-circuit current limiter with high reliability and method thereof - Google Patents
Short-circuit current limiter with high reliability and method thereof Download PDFInfo
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- CN102306933A CN102306933A CN201110269732A CN201110269732A CN102306933A CN 102306933 A CN102306933 A CN 102306933A CN 201110269732 A CN201110269732 A CN 201110269732A CN 201110269732 A CN201110269732 A CN 201110269732A CN 102306933 A CN102306933 A CN 102306933A
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Abstract
The invention relates to a short-circuit current limiter with high reliability and a short-circuit current limiting method thereof. The limiter has relatively higher overall performance, a simple direct current circuit and a simple control method thereof, and high reliability. The limiter comprises a saturable reactor iron core. An alternating current coil unit and a direct current coil unit are arranged on the iron core. One end of the alternating current coil unit is connected with one input end of a rectification circuit, and the other end of the alternating current coil unit and another input end of the rectification circuit are connected with an external circuit. The output end of the rectification circuit is connected in series with the direct current coil unit to form a direct current loop. Two thyristors are reversely connected in parallel between the input ends of the rectification circuit. Two input terminals of a control module are connected with the two ends of each thyristor, and the other two input terminals of the control module are connected with two terminals of the alternating current coil unit by a voltage transformer. Two output terminals of the control module are connected with the triggering ends of the two thyristors respectively, and control the on-state of the two thyristors.
Description
Technical field
The present invention relates to electric power system and send the power transformation technical field, short circuit current limiter and method thereof that particularly a kind of reliability is high.
Background technology
Along with the continuous development of electric power system, the continuous rising of generate output, the electric power system short circuit current that causes that is short-circuited is very big.The be short-circuited short circuit current that causes of electric power system is very big to the harm of electric power system.Therefore, reduce short circuit current, can reduce the extent of damage of power equipment when short circuit, improve the stability of electric power system.
The method and apparatus of Recent study limiting short-circuit current (also claiming short circuit current limiter) becomes heat subject.
There have been many short circuit current limiter new principles to be suggested, but all had variety of issue.Saturation reactance type short circuit current limiter is a kind of research direction, US Patent No. PO4031457,4122385,4152637,20090021875A1; Chinese patent 2004100802846 " a kind of fault current limiter " all is a saturation reactance type short circuit current limiter, and these inventions differ from one another, but combination property and effect are good inadequately.Particularly, DC circuit and control method thereof are complicated, unreliable.
Summary of the invention
The object of the invention is exactly in order to address the above problem, provide a kind of combination property better, DC circuit and control method is simple, reliability is high short circuit current limiter and method thereof.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
The short circuit current limiter that a kind of reliability is high, it comprises: a saturable reactor, saturable reactor have four terminals; AC coil group terminal I is connected saturable reactor internal communication coil groups with AC coil group terminal II, and the alternating current path is provided; Dc coil group terminal I is connected the inner dc coil group of saturable reactor with dc coil group terminal II, DC current path is provided; AC coil group and dc coil group interact through the inner closed loop iron core of saturable reactor;
One cover full bridge rectifier; Two inputs of rectification circuit and the AC coil group of saturable reactor are connected in series; Full bridge rectifier output and dc coil group are connected in series, and form dc loop circuit;
Reverse parallel connection thyristor D5 and thyristor D6 between the input of full bridge rectifier; The thyristor of two reverse parallel connections is controlled by control module;
Control module has two input terminals to connect the two ends of thyristor D5 and thyristor D6, obtains the voltage between thyristor D5 and thyristor D6 positive pole and the negative pole; Control module two input terminals in addition is connected with two terminals of AC coil group through voltage transformer, obtains the voltage between two terminals of AC coil group; Control module also has two lead-out terminals to be connected with the trigger end of thyristor D5, thyristor D6 respectively, controls the conducting state of thyristor D5, thyristor D6 respectively;
Control module is when the forward voltage instantaneous value is less than set point at thyristor D5 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D5 trigger end is connected, and thyristor D5 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D5 two ends, and the terminal that control module is connected with thyristor D5 trigger end sends a trigger impulse at once, makes thyristor D5 at this moment forward conduction, after reverse voltage arrives, ends.Control module is when the forward voltage instantaneous value is less than set point at thyristor D6 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D6 trigger end is connected, and thyristor D6 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D6 two ends, and the terminal that control module is connected with thyristor D6 trigger end sends a trigger impulse at once, makes thyristor D6 at this moment forward conduction, after reverse voltage arrives, ends.
Said control module is at thyristor D5 or thyristor D6 voltage instantaneous value in a period of time greater than set point; Detect voltage between two terminals of AC coil group again greater than set point; Control module is sent trigger impulse, makes thyristor D5 and thyristor D6 full conducting during the voltage between two terminals of AC coil group is greater than set point; Control module obtains halt instruction, stops to send trigger impulse.
Shunt capacitance C1, piezo-resistance R1 and high-power voltage-stabiliser tube D7 between said dc coil group terminal I and dc coil group terminal II.
Said AC coil group is AC coil L1, the L4 on the saturable reactor iron core, and said dc coil group is dc coil L2, L5.
The current-limiting method of the short circuit current limiter that a kind of reliability is high,
When electric power system normally moved, the transmitting loop electric current provided direct current for saturable reactor dc coil group; Saturable reactor both sides iron core is in saturation condition, and saturable reactor AC coil group is very little to the impedance of transmitting loop, can not influence the electricity consumption of load;
When the transmitting loop failed because; The electric current of short circuit current flow limiter begins to increase; Carry out thyristor D5 or thyristor D6 two ends forward voltage instantaneous value earlier and send first criterion that trigger impulse makes thyristor D5 or the conducting of thyristor D6 part as control module greater than set point; The voltage of carrying out then between two lead-out terminals of AC coil group sends second criterion that trigger impulse makes thyristor D5 and the full conducting of thyristor D6 greater than set point as control module, according to automatic second criterion of cutting off of transmission line automatic reclosing time; If electric power system fault is a transient fault, first criterion is failure to actuate, and electric power system recovers normal operation automatically; If electric power system fault is a permanent fault, first criterion is still moved, and the short circuit current limiter limiting short-circuit current that reliability is high excises fault selectively by power system relay protection device.
Said control module is when the forward voltage instantaneous value is less than set point at thyristor D5 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D5 trigger end is connected, and thyristor D5 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D5 two ends, and the terminal that control module is connected with thyristor D5 trigger end sends a trigger impulse at once, makes thyristor D5 at this moment forward conduction, after reverse voltage arrives, ends.Get into next cycle then, carry out so repeatedly.Control module is when the forward voltage instantaneous value is less than set point at thyristor D6 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D6 trigger end is connected, and thyristor D6 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D6 two ends, and the terminal that control module is connected with thyristor D6 trigger end sends a trigger impulse at once, makes thyristor D6 at this moment forward conduction, after reverse voltage arrives, ends.Get into next cycle then, carry out so repeatedly.
Said thyristor D5 or thyristor D6 two ends forward voltage set point are: the pressure drop that produces at the full bridge rectifier input when transmitting loop maximum load current passes through saturable reactor, multiply by safety factor again greater than 1.
Said control module is at thyristor D5 or thyristor D6 voltage instantaneous value in a period of time greater than set point; Detect voltage between two terminals of AC coil group again greater than set point; Control module is sent trigger impulse, makes thyristor D5 and thyristor D6 full conducting during the voltage between two terminals of AC coil group is greater than set point; Control module obtains halt instruction, stops to send trigger impulse.
Voltage setting value between two lead-out terminals of said AC coil group is: the transmitting loop rated voltage multiply by the safety factor less than 1.
The invention has the beneficial effects as follows: DC circuit structure and control method thereof are simple, economical, reliable; Short circuit current limiter only needs an input terminal and a lead-out terminal for the outside, uses as two-terminal device, and is very easy to use.As the two-terminal nonlinear device, the electric current through device is during less than load current value, and the reactance of device is very little, can not influence the power supply capacity of transmitting loop; Electric current through device is during greater than rated value, and the reactance of device increases fast, and device can be restricted to the load current order of magnitude to short circuit current fast; Short circuit is very little to the influence of power equipment voltage around the short dot.In a single day short dot disappears, and the short circuit current limiter that reliability is high can be realized recovering automatically transmitting loop and normally move; Send out the thyristor trigger impulse for the possible mistake of control module, also only can influence the time of half cycle, influence less, the operational reliability height.
Description of drawings
Fig. 1 representes the structure and the connected mode of the short circuit current limiter that a kind of reliability is high.
Fig. 2 representes a kind of agent structure and connected mode of saturable reactor.
Wherein, 1. input terminal and AC coil group terminal I, 2. AC coil group terminal II, 3. dc coil group terminal I, 4. dc coil group terminal II, 5. lead-out terminal, 6. saturable reactor, 7. voltage transformer, 8. control module, 9. saturable reactor iron core.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
A kind of structure of short circuit current limiter of thyristor control and connected mode are as shown in Figure 1.A kind of short circuit current limiter of thyristor control has a saturable reactor 6, and saturable reactor 6 has four terminals, AC coil group terminal I1, AC coil group terminal II 2, dc coil group terminal I3, dc coil group terminal II 4; AC coil group terminal I1 is connected saturable reactor internal communication coil groups with AC coil group terminal II 2, and the alternating current path is provided; Dc coil group terminal I3 is connected the inner dc coil group of saturable reactor with dc coil group terminal II 4, DC current path is provided; AC coil group and dc coil group interact through the inner closed loop iron core 9 of saturable reactor; The full bridge rectifier that one cover is made up of diode D1, diode D2, diode D3, diode D4; Two inputs of full bridge rectifier and the AC coil group of saturable reactor are connected in series in the input terminal (being AC coil group terminal I1) and lead-out terminal 5 of device; Full bridge rectifier output and dc coil group are connected in series, and form dc loop circuit; Reverse parallel connection thyristor D5 and thyristor D6 between the input of full bridge rectifier; The thyristor of two reverse parallel connections is by control module 8 controls; Control module 8 has two input terminals to connect the two ends of thyristor D5 and thyristor D6, obtains the voltage between thyristor D5 and thyristor D6 positive pole and the negative pole; Two input terminals of control module 8 are connected with two terminals (AC coil group terminal I1, AC coil group terminal II 2) of AC coil group through voltage transformer 7, obtain the voltage between two terminals of AC coil group; Control module 8 also has two lead-out terminals to be connected with the trigger end of thyristor D5, thyristor D6 respectively, controls the conducting state of thyristor D5, thyristor D6 respectively.
Shunt capacitance C1, piezo-resistance R1 and high-power voltage-stabiliser tube D7 are gone back in said dc coil group two ends (dc coil group terminal I1, dc coil group terminal II 2).Operation principle is a general knowledge, and is no longer burdensome here.
When the electric power system of the short circuit current limiter normal operation input of a kind of thyristor control, the transmitting loop electric current provides direct current for saturable reactor dc coil L2, L5.Saturable reactor both sides iron core is in saturation condition all the time, and saturable reactor AC coil L1, L4 are very little to the impedance of transmitting loop, can not influence the electricity consumption of load.
When the transmitting loop failed because, the electric current of short circuit current flow limiter begins to increase, and control module 8 detects Power System Shortcuts and takes place, and sends the conducting order for immediately thyristor D5, D6; After thyristor D5, the D6 conducting, the voltage at full bridge rectifier two ends drops to the tube voltage drop of thyristor D5, D6.Direct current in the dc coil of saturable reactor descends; Saturable reactor both sides iron core breaks away from saturation condition, is connected on the saturable reactor AC coil L1 in the transmitting loop, the quick change greatly of reactance of L4, and the voltage at AC coil L1 and L4 two ends increases fast.The electric current that flows through AC coil L1 and L4 is limited.
In order to improve combination property; The present invention takes to carry out thyristor D5 or thyristor D6 two ends forward voltage instantaneous value earlier and sends first criterion that trigger impulse makes thyristor D5 and the conducting of thyristor D6 part greater than set point as control module 8; The voltage of carrying out then between two lead-out terminals of AC coil group sends second criterion that trigger impulse makes thyristor D5 and the full conducting of thyristor D6 greater than set point as control module 8, according to automatic second criterion of cutting off of transmission line automatic reclosing time; If electric power system fault is a transient fault, first criterion is failure to actuate, and electric power system recovers normal operation automatically; If electric power system fault is a permanent fault, first criterion is still moved, and the short circuit current limiter limiting short-circuit current that reliability is high excises fault selectively by power system relay protection device.
Said thyristor D5 or thyristor D6 two ends forward voltage set point are: the pressure drop that the transmitting loop maximum load current produces at the full bridge rectifier input when the saturable reactor, multiply by again greater than 1 safety factor (for example: 1.2).
Like this; When the electric power system of the short circuit current limiter normal operation input of a kind of thyristor control; The electric current that flows through the dc coil group is less; The voltage of full bridge rectifier input is also smaller; Less than set point; Thyristor D5 and thyristor D6 complete shut-down are disconnected, and short circuit current limiter does not influence transmission of electric energy.When transmitting loop was short-circuited, short circuit current was greater than maximum load current, and this electric current flows through the dc coil group after the full bridge rectifier rectification, and produced pressure drop at the full bridge rectifier input.This pressure drop is during greater than thyristor D5 or thyristor D6 two ends forward voltage set point, and thyristor D5 or thyristor D6 end after reverse voltage arrives at this forward conduction constantly, get into next cycle then, carry out so repeatedly.Though what flow into the dc coil group is direct current, the voltage of full bridge rectifier input is alternating voltage.So, control module 8 control thyristor D5 or thyristor D6 part conducting in half cycle, the direct current that flows into short circuit current limiter dc coil group reduces the short circuit current limiter limiting short-circuit current.The advantage of this control strategy is, short dot is in case disappear, and thyristor D5 or thyristor D6 turn-off immediately, and transmitting loop recovers normal operation immediately; Send out the thyristor trigger impulse for control module 8 possible mistakes, also only can influence the time of half cycle, influence less.The shortcoming of this control strategy is that short circuit current can not be limited to below the load current.
For the further current limitation effect that improves a kind of short circuit current limiter of thyristor control.Control module is at thyristor D5 or thyristor D6 voltage instantaneous value in a period of time greater than set point; Detect voltage between two terminals of AC coil group again greater than set point; Control module 8 is sent trigger impulse; Make thyristor D5 and thyristor D6 full conducting during the voltage between two terminals of AC coil group is greater than set point, the voltage between two lead-out terminals of AC coil group is less than set point.Voltage setting value between two lead-out terminals of AC coil group is: the transmitting loop rated voltage multiply by safety factor less than 1 (for example 0.7).When electric power system normally moved, the voltage between two lead-out terminals of AC coil group was very low, and control module 8 can not sent trigger impulse.Electric power system failed because, control module 8 are at first because the voltage of full bridge rectifier input is high, and triggering thyristor D5 and thyristor D6; And cause that the voltage between two terminals of AC coil group rises; Voltage between two terminals of AC coil group is greater than set point, and control module 8 is sent trigger impulse, makes thyristor D5 and the full conducting of thyristor D6.Thyristor D5 and the full conducting of thyristor D6 show that the direct current that flows into short circuit current limiter dc coil group during this is zero, short circuit current limiter limiting short-circuit current to minimum value (exciting current of AC coil group).Reach short circuit current is restricted to the load current order of magnitude, short circuit is very little to the influence of power equipment voltage around the short dot, the purpose that the switching characteristic of saturable reactor is fully used.Control module 8 obtains halt instruction or obtains the automatic reclosing instruction, stops to send trigger impulse.
Through obtaining the voltage method between two terminals of AC coil group, can reach the purpose of invention, and more convenient and reliable.In fact, do not obtain the voltage between two terminals of AC coil group,, can realize the object of the invention yet, and can save voltage transformer 7, just effect and poor reliability through additive methods such as increase logical circuits.
Because the high short circuit current limiter of reliability can be realized two-terminal device; Do not need external equipment; Do not need external control power supply; Power electronic element potential difference in rectification circuit and the control circuit is little; The electromagnetism operational environment of device Power Electronic Circuit is better; Functional reliability is high, and is not fragile.
Short circuit current limiter and method thereof that a kind of reliability of the present invention is high can manufacture and design with prior art, can realize fully.Broad prospect of application is arranged.
Claims (9)
1. short circuit current limiter that reliability is high, it is characterized in that it comprises: a saturable reactor, saturable reactor have four terminals; AC coil group terminal I is connected saturable reactor internal communication coil groups with AC coil group terminal II, and the alternating current path is provided; Dc coil group terminal I is connected the inner dc coil group of saturable reactor with dc coil group terminal II, DC current path is provided; AC coil group and dc coil group interact through the inner closed loop iron core of saturable reactor;
One cover full bridge rectifier; Two inputs of rectification circuit and the AC coil group of saturable reactor are connected in series; Full bridge rectifier output and dc coil group are connected in series, and form dc loop circuit;
Reverse parallel connection thyristor D5 and thyristor D6 between the input of full bridge rectifier; The thyristor of two reverse parallel connections is controlled by control module;
Control module has two input terminals to connect the two ends of thyristor D5 and thyristor D6, obtains the voltage between thyristor D5 and thyristor D6 positive pole and the negative pole; Control module two input terminals in addition is connected with two terminals of AC coil group through voltage transformer, obtains the voltage between two terminals of AC coil group; Control module also has two lead-out terminals to be connected with the trigger end of thyristor D5, thyristor D6 respectively, controls the conducting state of thyristor D5, thyristor D6 respectively;
Control module is when the forward voltage instantaneous value is less than set point at thyristor D5 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D5 trigger end is connected, and thyristor D5 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D5 two ends, and the terminal that control module is connected with thyristor D5 trigger end sends a trigger impulse at once, makes thyristor D5 at this moment forward conduction, after reverse voltage arrives, ends; Control module is when the forward voltage instantaneous value is less than set point at thyristor D6 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D6 trigger end is connected, and thyristor D6 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D6 two ends, and the terminal that control module is connected with thyristor D6 trigger end sends a trigger impulse at once, makes thyristor D6 at this moment forward conduction, after reverse voltage arrives, ends.
2. the high short circuit current limiter of reliability as claimed in claim 1; It is characterized in that; Said control module is at thyristor D5 or thyristor D6 voltage instantaneous value in a period of time greater than set point; Detect voltage between two terminals of AC coil group again greater than set point; Control module is sent trigger impulse, makes thyristor D5 and thyristor D6 full conducting during the voltage between two terminals of AC coil group is greater than set point; Control module obtains halt instruction, stops to send trigger impulse.
3. the high short circuit current limiter of reliability as claimed in claim 1 is characterized in that, shunt capacitance C1, piezo-resistance R1 and high-power voltage-stabiliser tube D7 between said dc coil group terminal I and dc coil group terminal II.
4. the high short circuit current limiter of reliability as claimed in claim 1 is characterized in that, said AC coil group is AC coil L1, the L4 on the saturable reactor iron core, and said dc coil group is dc coil L2, L5.
5. the current-limiting method of the short circuit current limiter that the arbitrary said reliability of claim 1-4 is high is characterized in that,
When electric power system normally moved, the transmitting loop electric current provided direct current for saturable reactor dc coil group; Saturable reactor both sides iron core is in saturation condition, and saturable reactor AC coil group is very little to the impedance of transmitting loop, can not influence the electricity consumption of load;
When the transmitting loop failed because; The electric current of short circuit current flow limiter begins to increase; Carry out thyristor D5 or thyristor D6 two ends forward voltage instantaneous value earlier and send first criterion that trigger impulse makes thyristor D5 or the conducting of thyristor D6 part as control module greater than set point; The voltage of carrying out then between two lead-out terminals of AC coil group sends second criterion that trigger impulse makes thyristor D5 and the full conducting of thyristor D6 greater than set point as control module, according to automatic second criterion of cutting off of transmission line automatic reclosing time; If electric power system fault is a transient fault, first criterion is failure to actuate, and electric power system recovers normal operation automatically; If electric power system fault is a permanent fault, first criterion is still moved, and the short circuit current limiter limiting short-circuit current that reliability is high excises fault selectively by power system relay protection device.
6. the current-limiting method of the short circuit current limiter that reliability as claimed in claim 5 is high; It is characterized in that; Said control module is when the forward voltage instantaneous value is less than set point at thyristor D5 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D5 trigger end is connected, and thyristor D5 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D5 two ends, and the terminal that control module is connected with thyristor D5 trigger end sends a trigger impulse at once, makes thyristor D5 at this moment forward conduction, after reverse voltage arrives, ends; Get into next cycle then, carry out so repeatedly; Control module is when the forward voltage instantaneous value is less than set point at thyristor D6 two ends, and control module is not sent out trigger impulse with the terminal that thyristor D6 trigger end is connected, and thyristor D6 ends; The forward voltage instantaneous value is greater than the moment of set point at thyristor D6 two ends, and the terminal that control module is connected with thyristor D6 trigger end sends a trigger impulse at once, makes thyristor D6 at this moment forward conduction, after reverse voltage arrives, ends; Get into next cycle then, carry out so repeatedly.
7. the current-limiting method of the short circuit current limiter that reliability as claimed in claim 6 is high; It is characterized in that; Said thyristor D5 or thyristor D6 two ends forward voltage set point are: the pressure drop that produces at the full bridge rectifier input when transmitting loop maximum load current passes through saturable reactor, multiply by safety factor again greater than 1.
8. the current-limiting method of the short circuit current limiter that reliability as claimed in claim 5 is high; It is characterized in that; Said control module is at thyristor D5 or thyristor D6 voltage instantaneous value in a period of time greater than set point; Detect voltage between two terminals of AC coil group again greater than set point; Control module is sent trigger impulse, makes thyristor D5 and thyristor D6 full conducting during the voltage between two terminals of AC coil group is greater than set point; Control module obtains halt instruction, stops to send trigger impulse.
9. the current-limiting method of the short circuit current limiter that reliability as claimed in claim 8 is high is characterized in that, the voltage setting value between two lead-out terminals of said AC coil group is: the transmitting loop rated voltage multiply by the safety factor less than 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269732.7A CN102306933B (en) | 2011-09-13 | 2011-09-13 | Short-circuit current limiter with high reliability and method thereof |
| PCT/CN2011/001986 WO2012075676A1 (en) | 2010-12-06 | 2011-11-29 | Current limiting device and method having flexible switching performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269732.7A CN102306933B (en) | 2011-09-13 | 2011-09-13 | Short-circuit current limiter with high reliability and method thereof |
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| CN102306933A true CN102306933A (en) | 2012-01-04 |
| CN102306933B CN102306933B (en) | 2014-01-15 |
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| CN201110269732.7A Expired - Fee Related CN102306933B (en) | 2010-12-06 | 2011-09-13 | Short-circuit current limiter with high reliability and method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592807A (en) * | 2012-02-09 | 2012-07-18 | 山东大学 | On-load tap switch of saturable reactor with switch characteristics |
| CN103872672A (en) * | 2014-03-05 | 2014-06-18 | 湖南大学 | Novel saturated iron core high-temperature superconductive current limiter served as harmonic suppressor |
| CN104376967A (en) * | 2014-11-28 | 2015-02-25 | 山东大学 | Direct-current saturable reactor rapid in reaction |
| CN106529736A (en) * | 2016-11-22 | 2017-03-22 | 新奥泛能网络科技股份有限公司 | Method and apparatus for predicting energy load of building |
| CN110350502A (en) * | 2019-07-24 | 2019-10-18 | 镇江大全赛雪龙牵引电气有限公司 | A kind of side rail wear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090052097A1 (en) * | 2007-08-20 | 2009-02-26 | Korea Electric Power Corporation | Hybrid-type superconducting fault current limiter |
| CN102130447A (en) * | 2011-03-25 | 2011-07-20 | 山东大学 | Thyristor controlled short circuit current limiter |
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2011
- 2011-09-13 CN CN201110269732.7A patent/CN102306933B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090052097A1 (en) * | 2007-08-20 | 2009-02-26 | Korea Electric Power Corporation | Hybrid-type superconducting fault current limiter |
| CN102130447A (en) * | 2011-03-25 | 2011-07-20 | 山东大学 | Thyristor controlled short circuit current limiter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592807A (en) * | 2012-02-09 | 2012-07-18 | 山东大学 | On-load tap switch of saturable reactor with switch characteristics |
| CN102592807B (en) * | 2012-02-09 | 2014-07-16 | 山东大学 | On-load tap switch of saturable reactor with switch characteristics |
| CN103872672A (en) * | 2014-03-05 | 2014-06-18 | 湖南大学 | Novel saturated iron core high-temperature superconductive current limiter served as harmonic suppressor |
| CN104376967A (en) * | 2014-11-28 | 2015-02-25 | 山东大学 | Direct-current saturable reactor rapid in reaction |
| CN104376967B (en) * | 2014-11-28 | 2016-11-02 | 山东大学 | The quick direct-curent saturable reactor of a kind of reaction |
| CN106529736A (en) * | 2016-11-22 | 2017-03-22 | 新奥泛能网络科技股份有限公司 | Method and apparatus for predicting energy load of building |
| CN110350502A (en) * | 2019-07-24 | 2019-10-18 | 镇江大全赛雪龙牵引电气有限公司 | A kind of side rail wear |
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| Publication number | Publication date |
|---|---|
| CN102306933B (en) | 2014-01-15 |
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