CN106374419A - Method for rapidly cutting off short circuit current in metallurgy power supply network - Google Patents
Method for rapidly cutting off short circuit current in metallurgy power supply network Download PDFInfo
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- CN106374419A CN106374419A CN201610998490.8A CN201610998490A CN106374419A CN 106374419 A CN106374419 A CN 106374419A CN 201610998490 A CN201610998490 A CN 201610998490A CN 106374419 A CN106374419 A CN 106374419A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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Abstract
The invention discloses a method for rapidly cutting off a short circuit current in a metallurgy power supply network and belongs to the field of metallurgy power supply systems. The method comprises the following steps: a microcomputer protection device receives fault current signals collected via a current transformer, and the current signals are subjected to logical judgement operation; when a fault current exceeds a setting value of the microcomputer protection device, an outlet contact point of the microcomputer protection device is connected with a tripping circuit of a vacuum circuit breaker, a tripping wire coil of the vacuum circuit breaker is electrified, the vacuum circuit breaker is enabled to trip, and a fault loop circuit is disconnected quickly. Via the method for rapidly cutting off the short circuit current in the metallurgy power supply network, rapid disconnection can be realized during three-phase short circuit time, tripping time is shorter than low voltage protection start time, the fault current can be rapidly cut off, other equipment on the power supply network can be prevented from being affected, and continuous power supply capability of a system can be improved.
Description
Technical field
The invention belongs to metallurgy supplies field of power, it is related to a kind of method of fast shut-off short circuit current, especially one
The method planting metallurgical supply network fast shut-off short circuit current.
Background technology
With the continuous development of power system, the continuous rising of generating capacity, power system is short-circuited the short circuit causing
Electric current increases therewith；The increase of short circuit current, has very big harm to power system stability, to equipment safety.Especially in metallurgical row
Industry, metallurgical supply network has the features such as power supply distance is short, supply load is concentrated, and in supply network, three-phase short for any point
It may appear that voltage sag during the fault of road, during the voltage sag of failure removal, the significantly decline of voltage effective value, due to
The presence of under-voltage protection, if timely faulty circuit can not be disconnected, will result in main line factories and miness automatic control system and low
The stoppage in transit of pressure control section sensitive load, produces to main line and causes heavy losses.
During the fault that is short-circuited in metallurgical supply network at present, it is combined in one using protective relaying device and vacuum switch group
Rise, disconnect the fault current time during fault that is short-circuited typically in 80ms, but supply network mesolow sensitive load and
The automatic control system under-voltage protection time is generally 50ms, is less than the trip protection time, thus short trouble can be led to cut
Except front, system mesolow catalyst and automatic control system under-voltage protection have intervened, and lead to non-faulting equipment recessed because of voltage
Fall into and stop transport, main line equipment stops production.In order to reduce the accident that voltage sag during three phase short circuit fault causes main line factories and miness to stop production, existing
Technology is from the lv contactor using deferred action, releases low-pressure system under-voltage protection and adopts in automatic control system
The methods such as high-capacity UPS to solve indirectly, and these methods decrease the scope that short trouble is related to a certain extent,
But do not tackle the problem at its root.
Existing related patent application in prior art, such as Chinese Patent Application No. is: 201010192105.3, publication date
For: in September, 2010 patent documentation of 1 day, disclose a kind of device and method of cut-out short circuit current, it can improve chopper and go out
Arc performance, improves circuit breaker trip capacity and shortens arc extinguishing time.It includes a chopper, a high-voltage switch gear,
One magnetic saturation reactor, after high-voltage switch gear is in parallel with magnetic saturation reactor, is connected with chopper；The device of cut-out short circuit current
It is connected on current supply circuit, when power system normally runs, the high-voltage switch gear of the device of cut-out short circuit current is closure, chopper
It is also closure；When power system normally runs, the device of cut-out short circuit current is lost is zero；When power system is short-circuited, need
When cutting off short circuit current, first jump the high-voltage switch gear of device, magnetic saturation reactor is put into short circuit current loop；Magnetic saturation reactance
Device reduces the current value of section around at short circuit current zero crossing, lengthens the time of small current section around at current zero-crossing point；
Then tripping circuit breaker, cuts off short circuit current.The shortcoming of the program is: when being short-circuited, before magnetic saturation reactor intervention,
Have to be off high-voltage switch gear, the speed of action of high-voltage switch gear is the key technology that scheme is implemented, and this key technology is in patent documentation
In not do not illustrate, such as high-voltage switch gear speed of action does not reach the requirement of low pressure sensitive load and automatic control system, fault coverage
Will expand, its inapplicable and metallurgical supply network.
Content of the invention
1st, problem to be solved
For existing metallurgy supply network be short-circuited fault when, due to the presence of under-voltage protection, fault coverage expands,
Lead to the problem that main line factories and miness stop production, the invention provides a kind of method of metallurgy supply network fast shut-off short circuit current,
During three-phase shortcircuit, the quick-break trip protection time is shorter than under-voltage protection opening time, fast shut-off fault, it is to avoid to supply network
The impact of upper miscellaneous equipment, improves the continued power ability of system.
2nd, technical scheme
For solving the above problems, the present invention adopts the following technical scheme that.
A kind of method of metallurgy supply network fast shut-off short circuit current, its operating procedure is:
1. by current transformer collection fault-current signal in microcomputer protecting device；
2. microcomputer protecting device accepts the current signal of current transformer, and carries out logical judgment to current signal, when event
Barrier electric current exceedes the setting valve of microcomputer protecting device, and microcomputer protecting device outlet junctions connect the trip(ping) circuit of vacuum circuit breaker；
3. the breaking coil of vacuum circuit breaker obtain electric, make vacuum circuit breaker trip, quickly disconnect fault loop.
Further, described microcomputer protecting device sampled data window width is 10ms, using half cycle Fourier algorithm.
Further, described microcomputer protecting device starts differentiation logic according to voltage jump amount trigger protection, according to electric current
Sudden Changing Rate confirms the unlatching of protection.
Further, described protected by microcomputer protecting equipment is combined by current instantaneous value and current half wave virtual value after starting and is sentenced
Not realize the identification of troubles inside the sample space.
Further, described microcomputer protecting device current instantaneous value and current half wave virtual value are combined and are sentenced method for distinguishing and be:
Instantaneous value differentiates logic, in continuous 10ms, if it exceeds its current sample instantaneous value is more than 0.95 the 5ms time
Times setting valve, and meeting all the time in continuous 3ms, that is, be judged to instantaneous value criterion and meet require；
Virtual value differentiates logic, if the current effective value obtaining after half-wave Fourier filtering meets in lasting 3ms surpassed
Cross setting valve, that is, be judged to virtual value and meet requirement；
If the instantaneous value criterion of fault current and virtual value criterion meet above-mentioned condition simultaneously, microcomputer protecting device stands
Send out quick-break trip signal.
Further, the vacuum circuit breaker disconnecting fault current is driven by permanent-magnet operating mechanism, and permanent-magnet operating mechanism accepts
The trip signal of microcomputer protecting device, drives the vacuum switch of vacuum circuit breaker to disconnect faulty line.
Further, the opening time of described vacuum circuit breaker is 10ms, and the quenching time is less than 15ms.
3rd, beneficial effect
Compared to prior art, the invention has the benefit that
(1) present invention shortens the time excising short circuit current in the case of fault causes fast tripping protection action, reduces due to short
The impact to system for the Voltage Drop that road is caused；
(2) present invention, in relay protection fault judgement, using half-wave Fourier algorithms, that is, accurately reflects fault-signal,
Shorten the fault sampling time again；
(3) microcomputer protecting device of the present invention is gathered with jump-value of current to voltage jump amount simultaneously, and comprehensive distinguishing starts
Logic, realizes the reliability that protection starts is judged.
Brief description
Fig. 1 is the circuit former road figure quickly cutting place's failed equipment in the embodiment of the present invention；
Fig. 2 is voltage and current oscillogram during metallurgical supply network fault in application examples 1 of the present invention；
Fig. 3 is voltage and current oscillogram during metallurgical supply network fault in application examples 2 of the present invention；
Fig. 4 is voltage and current oscillogram during metallurgical supply network fault in application examples 3 of the present invention；
In figure: 1, vacuum circuit breaker；2nd, breaking coil；3rd, current transformer；4th, microcomputer protecting device.
Specific embodiment
Combine to solve traditional Microcomputer Protection and vacuum switch, when metallurgical supply network is short-circuited fault
The fast tripping protection trip time typically in 80ms about situation, the present invention provide a kind of metallurgy supply network fast shut-off short circuit electricity
The method of stream, makes metallurgical supply network occur short circuit current mute time during three phase short circuit fault to be less than 50ms, improves power supply
System operation reliability.It is described in detail below in conjunction with embodiment and accompanying drawing.
Embodiment
As shown in figure 1, a kind of method of the metallurgy supply network fast shut-off short circuit current by realizing the present embodiment is adopted
Quickly cut the circuit theory diagrams of place's failed equipment, it is by current transformer 3 and microcomputer protecting device 4 and vacuum circuit breaker
1 composition, current transformer 1 is serially connected in major loop, its secondary coil connected with computer protection device 4, when institute's line sending road occurs three
Mutually during short circuit, current transformer 3 accepts fault-current signal, and this current signal is transported in microcomputer protecting device 4, microcomputer
Protection device 4 carries out logical judgment to this current signal, and when fault current exceedes the setting valve of microcomputer protecting device 4, microcomputer is protected
Protection unit 4 outlet junctions connect the trip(ping) circuit of vacuum circuit breaker 1, so that breaking coil 2 is obtained electric, so that vacuum circuit breaker 1 is tripped, soon
Fault loop is opened in quick-break.
In the present embodiment, using high reliability, the permanent-magnet operating mechanism of quick action drive chopper 1 to be closed a floodgate or
Separating brake.Microcomputer protecting device 4 sampled data window width is 10ms, and adopts half-wave Fourier algorithms, it is to avoid all-wave Fourier calculates
The shortcoming of method response time length；Microcomputer protecting device 4 accepts jump-value of current and voltage jump amount signal simultaneously, after comprehensive distinguishing
Quick starting protection, opens the exit relay working power of microcomputer protecting device 4 in advance；Microcomputer protecting device 4 gathers electric current
Instantaneous value and current half wave virtual value, combine differentiation to realize the reliable recognition of troubles inside the sample space, if the instantaneous value of fault current
Criterion and virtual value criterion meet the above-mentioned time requirement continuing 3ms simultaneously, then microcomputer protecting device 4 is sent out quick-break tripping operation immediately and referred to
Order.Distinguish, now by voltage x current Sudden Changing Rate, the startup order that have issued microcomputer protecting device 4 in advance, then export immediately
Breaking coil 2 is made to obtain electric, chopper 1 tripping operation disconnects fault loop.
In a standard sine wave, the absolute value of instantaneous value have half the time be greater than virtual value (45 °～135 °,
225 °～315 °), so if it find that within the time of half cycle of standard sine wave, occurring in that at least 1/4 cycle
Instantaneous value is more than setting valve, substantially it can be assumed that its virtual value is also greater than setting valve.In order to ensure reliability, using half-wave algorithm
The amplitude obtaining is more than setting valve, and the absolute value 5 instantaneous values simultaneously at least carrys out comprehensive descision more than setting valve, can keep away
Exempt from because external disturbance leads to be likely to occur sampling extremely and so that the amplitude that half-wave Fourier algorithms obtain surpasses less than 4 points
Cross setting valve and lead to the situation of false protection.But when sine wave is between 135 °～225 ° and -45 °～45 °, even if width
More than when adjusting, its instantaneous value is likely to less than setting valve value, thus this method can lead to operating time of protection than purely
Half-wave algorithm (action delay 10ms) the slow sampling interval (less than 1ms) of meeting, but still whole Fourier algorithm institutes can be faster than
The time delay of the 20ms needing.
But the aperiodic component due to existing during short trouble, combines instantaneous algorithm using half-wave Fourier algorithms, still
So there may be several cycles before fault, fault current exceedes setting valve, and fault current is critical less than setting valve afterwards
Fault zone.This critical fault area is possible to cause protection to bypass the immediate leadership action, therefore, using half-wave Fourier algorithms joint
Instantaneous algorithm, can be directly used for the protection of end-equipment, or only uses in a cycle after fault generation, a cycle
Switch to all-wave algorithm afterwards.And in first cycle that this fault occurs, then (1.5 times whole by properly increasing working value
Definite value) escaping it may happen that action of bypassing the immediate leadership.
Medium voltage network fault clearing time was collectively constituted by protective relaying device movement time and breaker time.This
Invention is started with reduction fault clearing time in terms of this is two simultaneously:
1st, high reliability, the permanent-magnet operating mechanism of quick action are adopted
Permanent-magnet manipulating mechanism is that a kind of permanent magnetism for high-pressure vacuum breaker 1 keeps, the operating mechanism of Electromagnetic Control.With
Traditional operating mechanism compares, and has that critical piece is few, is the 7% of conventional circuit breaker operating mechanism parts, need not machinery de-
Padlock buckle device, trouble point is few, high reliability, long service life, and the wherein permanent-magnet operating mechanism life-span, up to more than 100,000 times, fits
In frequent operation and highly reliable application in substations.Permanent magnet mechanism overcomes the deficiency of conventional spring mechanism and electromagnetic mechanism, simultaneously
By permanent magnet material realize vacuum circuit breaker divide, the holding of closing position and operating process, the present embodiment adopts abb company of the U.S.
Vm1-t type chopper, using vacuum interrupter and cast pole, opening time 10ms, the quenching time be less than 15ms, this switch
Have that mechanism's parts are few, the advantage of high reliability, its rated current INTERRUPTION LIFE can reach 20000 times.
2nd, innovate protective relaying device data processing method, reduce the protection exit time
2.1st, reduce data window width
Microcomputer protecting device 4 sampled data window width affects the recognition time to fault for the fast tripping protection, and then affects protection
Whole group movement time.Data window is wider, and the measurement of fault amount is more accurate, and the Reliability of Microprocessor of protection is also higher.The present embodiment
Ensure fast tripping protection whole group movement time within 20ms, for power frequency fault amount, 10ms is half cycle, can be than calibrated
True reaction fault-signal, the data window less than 10ms is although to a certain extent speed of action can be improved, but smelter is all
The higher hamonic wave producing when the electromagnetic interference of surrounding environment and electric network fault all significantly affects producing to the extraction of fault amount, and it moves
Make reliability to substantially reduce than 10ms.Movement time in view of the exit relay within microcomputer protecting device 4 is about
5ms, therefore the present embodiment microcomputer protecting device 4 sampled data window width are 10ms.For the data window of 10ms, adopt in the present invention
With the reasonable half-wave Fourier algorithms of filter effect (known algorithm).
2.2nd, adopt jump-value of current and the quick starting protection of voltage jump amount comprehensive distinguishing, open Microcomputer Protection dress in advance
The exit relay working power put
During traditional Microcomputer Protection design, relay protection is to improve reliability, and exit relay power supply must activated relay
Controlling, such starting relay forms "AND" logic with exit relay, to reduce the malfunction probability of protection for the contact of device.But
It is because the power supply of exit relay is by starting relay control, so even cpu system is simultaneously emitted by instruction triggers this two
Relay, in actual act sequential, is also that starting relay first closes, and then exit relay obtains controlling power supply to be closed again.
If the speed of action of this two relays is 5ms, reality starts to exit relay closure from protection device and also at least needs
Want 10ms.Therefore, it is necessary to take steps to so that starting relay starts in 5ms after fault generation, guarantee startup continues
The action of electrical equipment does not affect the movement time of exit relay.
Voltage jump amount and jump-value of current comprehensive distinguishing is adopted to start logic in the present embodiment it is ensured that microcomputer protecting device
4 reliable startups in less than 5ms.In catastrophe failure, because of the presence of system impedance, the change of voltage is often compared with curent change more
For violent, but because, in fast tripping protection, the size of fault current is the main criterion of relay protective scheme, therefore current change quantity is compared with voltage
Variable quantity is more reliable.Therefore in the present embodiment, microcomputer protecting device 4 accepts faulty circuit voltage jump amount simultaneously and electric current is dashed forward
Variable, voltage jump amount trigger protection starts differentiation logic, and jump-value of current confirms whether protection should start, thus realizing protecting
Protection unit reaches quick, reliable startup and takes into account.
2.3rd, combine differentiation to realize the reliable recognition of troubles inside the sample space using current instantaneous value and current half wave virtual value
Due to design requirement data window only 10ms, and the speed of action pursuing protection requires protection device to be only capable of fault sends out
After raw 10ms more continuous differentiate be necessary for sending trip command that (10ms data window+3ms continuously differentiates that+5ms outlet continues less than 3ms
Electrical equipment movement time=18ms).Therefore, microcomputer protecting device 4 will become very sensitive to external disturbance and harmonic signal.For carrying
The Reliability of Microprocessor of high protection device, the present embodiment adopts the joint method of discrimination of current instantaneous value and half-wave virtual value, to carry
The reliability of high protection.Current instantaneous value has the characteristics that distinguishing speed is fast, but has certain error near working value threshold, inconvenience
Differentiate in fixed value adjusting, and current half wave virtual value is then conducive to fixed value adjusting, on the one hand the two combines just makes action sentence
According to having rapidity, on the other hand also allow for fixed value adjusting and calculate, reduce definite value error.
Instantaneous value differentiates logic, in continuous 10ms, if it exceeds its current sample instantaneous value is more than 0.95 the 5ms time
Times setting valve, and above-mentioned situation meets requirement all the time in continuous 3ms, that is, be judged to instantaneous value criterion and meet require (a virtual value
Sine wave for 1, in any continuous 10ms, the cumulative time not less than 1 for its instantaneous value is exactly 5ms).
Virtual value differentiates logic, if held using the current effective value obtaining after half-wave Fourier filtering (known technology)
Meet in continuous 3ms and exceed setting valve, that is, be judged to virtual value and meet requirement
If the instantaneous value criterion of fault current and virtual value criterion meet the above-mentioned time requirement continuing 3ms simultaneously,
Microcomputer protecting device 4 sends out quick-break trip signal immediately.Now have issued the startup order of microcomputer protecting device 4 in advance, then
This fast tripping protection will export immediately.
From the foregoing, in the present embodiment, chopper 1 movement time is 10ms, microcomputer protecting device 4 in three-phase shortcircuit therefore
During barrier movement time within 30ms, when occur three phase short circuit fault when, disengagement failure current control, within 50ms, shortens
Voltage sag time during fault, improve continuous power supply capacity.
Several application examples are given below above scheme is verified, specific as follows.
Application examples 1
The method of above-described embodiment 1 applies the energy management and control center 62# electric substation in Ma'anshan Iron and Steel Co., Ltd
On 6221# outgoing line cabinet, since enforcement there is the short trouble of multiple fast tripping protection action in this outgoing line cabinet, and the program all achieves very
Good effect:
On January 1st, 2014,6221# circuit fast tripping protection action, protection seting value is (2000a, 0s), fault oscillograph
The display 6221# cabinet trip time is 34ms (see accompanying drawing 2), and fault does not produce to H type steel and impacts.After fault, by right
Line data-logging, failure cause is that a 6221# circuit 25# point -1# point user transformers lead blows short circuit and leads to.
Application examples 2
On March 3rd, 2015,6221# circuit fast tripping protection action, protection seting value is (2000a, 0s), fault oscillograph
Display fault clearing time is 36ms (see Fig. 3), because the trip time is fast, to 62# electric substation 10kv i section busbar voltage depression
Time is short, and fault does not produce to H type steel and impacts.By the inspection to circuit, trip reason is circuit 10#--11# point
Between below circuit squatter building glass housing steel watt tilting cause aerial condutor short circuit to cause.
Application examples 3
On December 12nd, 2015,6221# circuit fast tripping protection action, protection seting value is (2000a, 0s), failure removal
Time is 34ms (see Fig. 4), and because the trip time is fast, short to the 62# electric substation 10kv i section busbar voltage depression time, fault does not have
Have H type steel is produced and impact.By the inspection to circuit, trip reason blows short for circuit 18# point on-pole switch wiring
Road is caused.
In Fig. 2, Fig. 3 or Fig. 4, va、vb、vcIt is expressed as the voltage of three-phase, ia、ib、icCorrespondence is expressed as three-phase
Electric current, and i0Represent three-phase average current.
Above three faults are fast due to switching off fault time, and three short troubles are not all right during voltage sag
H type steel mill produces and has any impact, and this invention is had to the continuous power supply capacity of raising by facts have proved more than a year very well
Effect.
Claims (7)
1. a kind of method of metallurgy supply network fast shut-off short circuit current, its operating procedure is:
1. by current transformer (3) collection fault-current signal in microcomputer protecting device (4)；
2. microcomputer protecting device (4) accepts the current signal of current transformer (3), and carries out logical judgment to current signal, when
Fault current exceedes the setting valve of microcomputer protecting device (4), and microcomputer protecting device (4) outlet junctions connect vacuum circuit breaker (1)
Trip(ping) circuit；
3. the breaking coil (2) of vacuum circuit breaker (1) must be electric, so that vacuum circuit breaker (1) is tripped, and quickly disconnects fault loop.
2. according to claim 1 a kind of metallurgy supply network fast shut-off short circuit current method it is characterised in that: institute
Microcomputer protecting device (4) the sampled data window width stated is 10ms, using half cycle Fourier algorithm.
3. according to claim 2 a kind of metallurgy supply network fast shut-off short circuit current method it is characterised in that: institute
State microcomputer protecting device (4) and differentiation logic is started according to voltage jump amount trigger protection, protection is confirmed according to jump-value of current
Open.
4. according to claim 2 a kind of metallurgy supply network fast shut-off short circuit current method it is characterised in that: institute
State after microcomputer protecting device (4) protection starts and combine differentiation to realize troubles inside the sample space by current instantaneous value and current half wave virtual value
Identification.
5. according to claim 4 a kind of metallurgy supply network fast shut-off short circuit current method it is characterised in that: institute
State microcomputer protecting device (4) current instantaneous value and current half wave virtual value combined and sentenced method for distinguishing and be:
Instantaneous value differentiates logic, in continuous 10ms, if it exceeds its current sample instantaneous value of 5ms time is whole more than 0.95 times
Definite value, and meet all the time in continuous 3ms, that is, it is judged to instantaneous value criterion and meet requirement；
Virtual value differentiate logic, if the current effective value obtaining after half-wave Fourier filtering meet in lasting 3ms exceed whole
Definite value, that is, be judged to virtual value and meet requirement；
If the instantaneous value criterion of fault current and virtual value criterion meet above-mentioned condition simultaneously, microcomputer protecting device (4) stands
Send out quick-break trip signal.
6. a kind of metallurgy supply network fast shut-off short circuit current according to claim 1 method it is characterised in that: disconnected
The vacuum circuit breaker (1) opening fault current is driven by permanent-magnet operating mechanism, and permanent-magnet operating mechanism accepts microcomputer protecting device (4)
Trip signal, drives the vacuum switch of vacuum circuit breaker (1) to disconnect faulty line.
7. according to claim 6 a kind of metallurgy supply network fast shut-off short circuit current method it is characterised in that: institute
The opening time of the vacuum circuit breaker (1) stated is 10ms, and the quenching time is less than 15ms.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992506A (en) * | 2017-06-02 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | A kind of fuse protection device and method applied to electromagnetic potential transformer |
| CN109038471A (en) * | 2018-08-08 | 2018-12-18 | 刘晓东 | A kind of intelligent switch controller fast trip algorithm based on curve matching |
| CN109061460A (en) * | 2018-09-03 | 2018-12-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of pole-mounted circuit breaker quickly cuts off the accurate measurement method of failures |
| CN112491002A (en) * | 2020-11-10 | 2021-03-12 | 安徽合凯电气科技股份有限公司 | Voltage sag control method based on split-phase control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202796772U (en) * | 2012-03-20 | 2013-03-13 | 深圳市金博联电力技术有限公司 | 10kV rapid intelligent column breaker |
| CN103795028A (en) * | 2014-01-15 | 2014-05-14 | 合肥同智机电控制技术股份有限公司 | Alternating-current intelligent power distribution control module |
| CN203722217U (en) * | 2013-12-26 | 2014-07-16 | 湘潭电气设备制造有限责任公司 | A high voltage cable comprehensive protective device |
| CN103928907A (en) * | 2014-05-07 | 2014-07-16 | 江西森源电力股份有限公司 | Intelligent vacuum circuit breaker used for protecting and controlling distribution transformer |
| CN203761017U (en) * | 2014-03-06 | 2014-08-06 | 上海德布森电气有限公司 | Short circuit current protection device of motor protector |
| CN105337262A (en) * | 2015-09-08 | 2016-02-17 | 广东美的制冷设备有限公司 | Variable frequency air conditioner and over-current protective circuit of power factor correction (PFC) circuit |
-
2016
- 2016-11-11 CN CN201610998490.8A patent/CN106374419B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202796772U (en) * | 2012-03-20 | 2013-03-13 | 深圳市金博联电力技术有限公司 | 10kV rapid intelligent column breaker |
| CN203722217U (en) * | 2013-12-26 | 2014-07-16 | 湘潭电气设备制造有限责任公司 | A high voltage cable comprehensive protective device |
| CN103795028A (en) * | 2014-01-15 | 2014-05-14 | 合肥同智机电控制技术股份有限公司 | Alternating-current intelligent power distribution control module |
| CN203761017U (en) * | 2014-03-06 | 2014-08-06 | 上海德布森电气有限公司 | Short circuit current protection device of motor protector |
| CN103928907A (en) * | 2014-05-07 | 2014-07-16 | 江西森源电力股份有限公司 | Intelligent vacuum circuit breaker used for protecting and controlling distribution transformer |
| CN105337262A (en) * | 2015-09-08 | 2016-02-17 | 广东美的制冷设备有限公司 | Variable frequency air conditioner and over-current protective circuit of power factor correction (PFC) circuit |
Non-Patent Citations (1)
| Title |
|---|
| 任晓丹，等: "《电力系统继电保护运行与调试》", 30 June 2014, 北京理工大学出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992506A (en) * | 2017-06-02 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | A kind of fuse protection device and method applied to electromagnetic potential transformer |
| CN106992506B (en) * | 2017-06-02 | 2018-09-11 | 云南电网有限责任公司电力科学研究院 | A kind of fuse protective device and method applied to electromagnetic potential transformer |
| CN109038471A (en) * | 2018-08-08 | 2018-12-18 | 刘晓东 | A kind of intelligent switch controller fast trip algorithm based on curve matching |
| CN109038471B (en) * | 2018-08-08 | 2024-04-02 | 刘晓东 | Intelligent switch controller quick tripping algorithm based on curve fitting |
| CN109061460A (en) * | 2018-09-03 | 2018-12-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of pole-mounted circuit breaker quickly cuts off the accurate measurement method of failures |
| CN112491002A (en) * | 2020-11-10 | 2021-03-12 | 安徽合凯电气科技股份有限公司 | Voltage sag control method based on split-phase control |
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