CN106532665A - Commutation failure blocking method based on dynamic reclosing sequence - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000000903 blocking effect Effects 0.000 title claims abstract description 18
- 230000001052 transient effect Effects 0.000 claims description 9
- 230000008033 biological extinction Effects 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 230000002045 lasting effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 description 8
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- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 201000004569 Blindness Diseases 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Emergency Protection Circuit Devices (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a commutation failure blocking method based on a dynamic reclosing sequence. The method comprises the following steps: 1, when an alternating current system of a receiving end power grid breaks down, a fault time t0 is recorded; 2, whether a commutation failure is caused by the alternating current failure is judged, if no, a direct current does not need to be blocked; and otherwise, the result that commutation is failed is determined, and a step 3 is executed; 3, a breaker is opened and performs an automatic reclosing operation at a reclosing setting time T, if reclosing is successful at the time t that is equal to the sum of t0 and T, it indicates that the alternating current fault is an instant fault, the direct current does not need to be blocked, and otherwise, the alternating current fault is determined to be a permanent fault, and the step 4 is executed; and 4, reclosing is performed when there has the permanent fault, the breaker is failed to be reclosed and is opened again, whether the commutation is continuously failed at the time t that is equal to the sum of t0, T and t1 after waiting for the time t1, if the commutation failure is ended, it indicates that the commutation failure is automatically recovered under the support of other alternating current system voltages, the direct current does not need to be blocked, and otherwise, it determines that the continuous commutation failures occur at the direct current, and the direct current is blocked.
Description
Technical field
The present invention relates to a kind of commutation failure blocking method based on dynamic reclosing time sequence, is related to power system technology neck
Domain.
Background technology
During 13, with the fast development of extra-high voltage alternating current-direct current electrical network, China's electrical network " tetanic weak friendship " is particularly thorny,
The operation characteristic of electrical network there occurs profound change, be mainly reflected in three aspects：(1) the impact overall situationization of the failure to system, electricity
Network operation security risk increases；(2) there is profound change, electrical network regulating power degradation in power supply architecture；(3) power electronics
Feature is highlighted, and stabilization of power grids form is more complicated.Operation of power networks feature causes AC system small sample perturbations cause whole spy
High voltage ac/dc electricity net safety stable problem, particularly AC fault cause commutation failure, and then cause direct current locking to be to affect
The greatest problem of extra-high voltage alternating current-direct current power grid operation.Persistence commutation failure constantly can produce impact to electrical network, while right
Power electronic devices has a negative impact；Receiving end low frequency is easily induced after persistence commutation failure causes direct current locking simultaneously, is sent
The cascading failures such as end high pressure.Therefore, when direct-current commutation failure occurs, both should not blindness locking direct current, commutation of can not leaving
Failure sustainable development, needs to find a kind of rational direct current blocking method.
Commutation failure causes direct current locking mainly to have two methods at this stage：Direct current 100Hz protects (method 1) and is based on
The blocking method (method 2) of n times power fall down.When method 1 mainly make use of commutation failure, inverter side DC current occurs greatly
The feature of the 100Hz components of amount.Method 1 has I, II section to protect, and its concrete measure is as shown in table 1.
1 direct current 100Hz direct current blocking methods of table
Method 1 is mainly characterized in that：I sections are protected and take the method for reducing DC current setting valve to avoid commutation failure
Purpose.Although this section protection presence ensure that well will not blindness locking direct current purpose, due to DC control sheet
There is the link of current limiting low-voltage in body, the link reduces the setting valve of DC current, therefore I in method 1 by normally only needing 10ms
There is inoperative possibility in section；II sections are provided with different setting times according to different DC engineerings, generally II sections
Setting time lacks rational theoretical proof.
Method 2 mainly make use of commutation failure during power fall down the characteristics of carry out direct current locking, as shown in Figure 1.Research
It was found that, during commutation failure, each power fall down is about 200ms or so, when adding up to fall n times with regard to locking direct current.N's takes
Influence factor is more for value, and what such as receiving-end system intensity, sending end particularly contained new forms of energy sending end bears overvoltage ability etc..At this stage
In addition to utilizing emulation and determining the value of N, it is difficult to carry out quantitative explanation to the value of N.Meanwhile, as new forms of energy are born in itself
How the lifting of low/overvoltage ride-through capability, avoid multi-infeed HVDC receiving end while commutation failure occurs becomes direct current locking
Major consideration.Therefore, in the urgent need to finding a kind of suitable direct current blocking method.
The content of the invention
For the problems referred to above, it is an object of the invention to provide it is a kind of be engaged with automatic reclosing sequential based on dynamic weight
The commutation failure blocking method of combined floodgate sequential.
For achieving the above object, the present invention takes technical scheme below：A kind of commutation based on dynamic reclosing time sequence is lost
Lose blocking method, it is characterised in that including herein below：
1) when receiving end electrical network AC system breaks down, record AC fault moment t0；
2) judge whether the AC fault causes commutation failure, if not causing commutation failure, without the need for locking direct current；Otherwise
Think to cause commutation failure, into step 3)；
3) chopper disconnects and carries out automatic reclosing operation in reclosing setting time T, if in moment t=t0+T
Reclosing success, show that the AC fault is transient fault, and commutation failure voluntarily can recover after failure vanishes, without the need for locking
Direct current, otherwise it is assumed that the AC fault is permanent fault, into step 4)；
4) when coinciding with permanent fault, chopper unsuccessful reclosing, subsequently tripping again, wait for a period of time t1, sentence
Break in moment t=t0+T+t1When whether continue commutation failure, if in moment t=t0+T+t1Commutation failure terminates, shows to change
Mutually fail and voluntarily recover under the support of other AC system voltages, without the need for locking direct current, otherwise it is assumed that direct current there occurs holding
Continuous commutation failure, locking direct current；Wherein, t1Represent the time margin needed for the complete tripping factor of consideration chopper.
Further, for single feed-in or many feed-ins area in direct current drop point electrical distance it is regional farther out, chopper
The automatic reclosing time, T was：
T=(tp.2+tQF2+tu)-(tp.1+tQF1)
In formula, tp.1Represent that the movement time of I sections, t are protected in this sidep.2Represent the movement time of offside II sections protection, tQF1、
tQF2For the movement time of both sides chopper, tuRepresent chopper, the quenching time of trouble point.
Further, for the direct current drop point electrical distance intensive direct current area of regional other many feed-ins farther out is removed, break
The automatic reclosing time T=max (T of road device1、T2), wherein,
T1=(tp.2+tQF2+tu)-(tp.1+tQF1)
In formula, tp.1Represent that the movement time of I sections, t are protected in this sidep.2Represent the movement time of offside II sections protection, tQF1、
tQF2For the movement time of both sides chopper, tuRepresent chopper, the quenching time of trouble point；
T2=0.625N-0.125
In formula, N represents electrical network feed-in extra-high voltage direct-current bar number.
Further, judge whether AC fault causes commutation failure based on blow-out angle, by receiving end electrical network AC system reality
The critical extinction angle r of border arc angle r and defaultminIt is compared, if r<rmin, then it represents that cause commutation failure, otherwise do not have
There is initiation commutation failure.
Due to taking above technical scheme, which has advantages below to the present invention：1st, it is of the invention with dynamic auto reclosing when
Sequence is engaged, and causes the setting time of direct current locking to provide rational theoretical foundation for commutation failure.2nd, the present invention with overlap
The lock time is engaged, it is ensured that direct current blocking time is adapted with reclosure time：For single feed-in or many feed-ins electrically away from
From area farther out, can be with fast speed locking direct current；For intensive many feed-ins area, by with longer reclosure time phase
Coordinate, it is to avoid the generation that system is subjected to impact again when ac and dc systemses such as coincide with permanent fault within a short period of time,
Many direct currents are reduced at utmost while the probability of commutation failure.To sum up, the present invention has not only given full play to straight-flow system itself
The effect of control is to ensure the voluntarily recovery of commutation failure, while also achieving the reliable locking direct current in persistence commutation failure
Purpose.
Description of the drawings
Fig. 1 is the power fall down schematic diagram of method 2 in prior art；
Fig. 2 is ac and dc systemses structural representation of the prior art；
Reclosing action timing diagram when Fig. 3 is AC fault；
Fig. 4 is commutation failure change curve schematic diagram when coinciding with transient fault；
Fig. 5 is to coincide with permanent fault commutation failure change curve schematic diagram；
Fig. 6 is the commutation failure blocking method flow chart based on dynamic reclosing time sequence of the present invention；
Fig. 7 is the dynamic reclosing time sequence curve synoptic diagram of the present invention；
North China Power Telecommunication Network grid structure figure in Fig. 8 embodiment of the present invention.
Specific embodiment
Detailed description is carried out to the present invention below in conjunction with accompanying drawing.It should be appreciated, however, that accompanying drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.
In existing high-voltage alternating system, auto recloser is typically equipped with.While in order to realize a tripping failure
The purpose of phase, all with single-pole reclosing function, only jumps failure phase during single-phase fault；If coinciding with transient fault, weigh
Synthesis work(；If permanent fault, then tripping three-phase breaker, and no longer overlap.As shown in Fig. 2 wherein Bm、BnDifference table
The chopper of timberline road both sides, F represent and break down on circuit T, Em、EnTwo receiving end AC systems are represented, chopper all has
Automatic reclosing function.
As shown in figure 3, when chopper coincides with permanent fault, circuit both sides chopper tripping three-phase, and no longer weigh
Close；When failure is transient fault, failure vanishes, chopper reclosing success.As shown in figure 4, bent by the change of blow-out angle
Line is characterizing the dynamic changing process of commutation failure when chopper coincides with transient fault：Generation is represented when blow-out angle is 0 °
Commutation failure failure (critical extinction angle is set to 0 °), otherwise represents that commutation failure recovers.As seen in Figure 4, although
After failure starts, (0.5s) commutation failure occurs immediately, and commutation failure failure occurs again in 0.6823s, but with wink
The disappearance (failure continue for 0.2s) of when property failure, commutation failure are just recovered before reclosing (1.1s), it is clear that in wink
DC system locking, commutation failure need not voluntarily can be recovered during when property failure.As shown in figure 5, the bright chopper of this curve table
The dynamic changing process of commutation failure when coinciding with permanent fault.As seen in Figure 5, due to event during chopper reclosing
Barrier is yet suffered from, so re-initiation commutation failure.As chopper coincides with permanent fault, so chopper is jumped at once
Three-phase is opened, and is no longer overlapped.But now inverter is in system EmSupport under, what commutation failure still suffered from voluntarily recovering can
Energy.
Can analyze with reference to Fig. 3～5 and draw, either permanent or transient fault, when chopper completes weight automatically
After combined floodgate, regardless of whether successful reclosing, all there is the possibility of recovery in commutation failure.Therefore, closed by the direct current that commutation failure causes
Lock logic needs to be engaged with automatic reclosing sequential：Made full use of DC control itself to recover commutation to lose before reclosing
Lose, if yet suffering from commutation failure after reclosing, then show that the commutation failure is persistence commutation failure, need direct current
Locking.In order to prevent from coinciding with during permanent fault, system is again resulted within a short period of time may many direct currents of induction under impact
The possibility of commutation failure, is that this present invention proposes a kind of method being engaged with dynamic auto reclosure time, such as Fig. 6 institutes simultaneously
Show, the present invention is comprised the following steps：
1st, when receiving end electrical network AC system breaks down, record AC fault moment t0。
2nd, judge whether the AC fault causes commutation failure (CF), if not causing commutation failure, without the need for locking direct current,
Otherwise it is assumed that cause commutation failure, into step 3, wherein, judge whether AC fault causes the commutation failure can be according to reality
Need to be judged that here is not limited using various existing methods, the present invention judges whether AC fault can cause commutation to lose
Lose is based on blow-out angle, by the receiving end electrical network AC system real extinction angle r and critical extinction angle r of defaultminCompared
Compared with if r<rmin, then it represents that cause commutation failure, otherwise do not cause commutation failure.
3rd, chopper disconnects and carries out automatic reclosing operation in reclosing setting time T, if in moment t=t0+T
Reclosing success, show that the AC fault is transient fault, and commutation failure voluntarily can recover after failure vanishes, without the need for locking
Direct current, otherwise it is assumed that the AC fault is permanent fault, into step 4.
When the 4th, coinciding with permanent fault, chopper unsuccessful reclosing, subsequently tripping again.Wait for a period of time t1, sentence
Break in moment t=t0+T+t1When whether continue commutation failure, if in moment t=t0+T+t1Commutation failure terminates, shows to change
Mutually fail and voluntarily recover under the support of other AC system voltages, without the need for locking direct current, otherwise it is assumed that direct current there occurs holding
Continuous commutation failure, locking direct current；Wherein, t1Represent nargin the time required to considering the factors such as the complete tripping of chopper, t in the present invention1
0.1s can be taken as, as example, not limited to this, can be selected according to actual needs, it is therefore an objective to prevent mistake from closing direct current
Lock.
The automatic reclosing time T of chopper is at present：
T=(tp.2+tQF2+tu)-(tp.1+tQF1) (1)
In formula, tp.1Represent this side protection I sections movement time (as shown in Fig. 2 if it is considered to M is this side, then tp.1Represent
M sides protection I sections movement times, similarly hereinafter)；tp.2Represent the movement time of offside II sections protection；tQF1、tQF2For both sides chopper
Movement time；tuRepresent chopper, the quenching time of trouble point.
But for chopper automatic reclosing, if chopper coincides with permanent fault, the system short time is again
It is secondary to be impacted, it is likely that to cause multiple-circuit line while commutation failure, therefore also need to a kind of new automatic reclosing side of adjusting
Method, with proper extension reclosure time, it is to avoid ac and dc systemses are impacted at short notice.East China Power Grid feed-in is extra-high at present
Straightening stream be 5 (give again direct current, brocade Su Zhiliu, guest gold direct current, the direct current that rather continues, illiteracy direct current), be direct current feed-in in the world most
Intensive area, the then maximum that can use N are 5, now corresponding reclosure time T1Desirable 3s, 3s are by open-phase operation electricity
The maximum duration that net can bear (considers electromotor and bears the ability of negative-sequence current, transformator zero-sequenceprotection operation time limit
And Inductance on Neutral of Shunt Reactors device overcurrent capability etc.).For single feed-in area N=1, the automatic reclosing of chopper
Time T1Minima is 0.5s, has obtained being illustrated in figure 7 chopper automatic reclosing time T based on this1It is extra-high with electrical network feed-in
Graph of relation between straightening stream bar number N, that is, obtain automatic reclosing time setting value T1With electrical network feed-in extra-high voltage direct-current
The relational expression of bar number N：
T1=0.625N-0.125 (2)
For direct current drop point electrical distance is regional farther out in single feed-in or many feed-ins area, open circuit is determined according to formula (1)
The automatic reclosing setting valve of device, wherein, in many feed-in areas described in the present invention, direct current drop point electrical distance area is farther out
Although finger is multi-infeed DC area, an independent direct current can not cause other direct currents while commutation failure.
For the intensive direct current area of other many feed-ins, the automatic reclosing setting valve T of chopper2Selection formula (1), (2) its
In maximum, i.e. T2=max (T, T1) determine the automatic reclosing setting valve of chopper.Formula (2) indicates the automatic closing time
Can change with the different of different extra-high voltage direct-current feed-in numbers, realize dynamic reclosure time and adjust.
Chopper automatic reclosing setting time value adopts above-mentioned obtaining value method, realizes direct current blocking time and reclosing
The purpose of time coordination：For intensive multi-infeed HVDC area, due to reclosure time T2Value is relatively large, then reduce coincidence
When permanent fault, system is suffered to impact within a short period of time again causes many direct currents while the probability of commutation failure；For
Although single direct current is many direct currents, electrical distance is regional farther out, the reclosure time for still being calculated using formula (1).
Below with Shandong District in North China Power Telecommunication Network as specific embodiment describe in detail the present invention based on dynamic reclosing when
The detailed process of the commutation failure blocking method of sequence.
1st, North China Power Telecommunication Network includes power grid of West Inner Mongolia, Beijing-Tianjin-Tangshan Grid, Shanxi Power Network, Hebei Power Network and Shandong Power, such as Fig. 8
It is shown.As seen in Figure 8, North China Power Telecommunication Network is to receive big sending end greatly：Both direct current had externally been sent, had also received external dc simultaneously.
Wherein, Shandong is the area of the most intensive feed-in, and one has 3 direct current feed-ins, wherein, prick blue or green direct current, on face direct current for extra-high voltage
Direct current, therefore take N=2.
2nd, determined by formula (1), the automatic reclosing time setting value of current Shandong Power is T=1s, can according to formula (2)
Obtain, now T1=1.125s, therefore take T2=max (T, T1)=1.125s.
3rd, assume Shandong receiving end network system in t0=0s breaks down, and discriminates whether commutation failure according to blow-out angle
Failure.Such as do not occur, then it represents that AC fault is not serious, without the need for locking direct current；Such as there is commutation failure, then detection time t=
1.125s when whether successful reclosing：Such as success, show that this failure is transient fault, commutation failure can be voluntarily after failure vanishes
Recover, without the need for locking direct current；It is such as unsuccessful, this failure is represented for permanent fault, unsuccessful reclosing, chopper tripping again；
Whether detection commutation failure in t=1.225s yet suffers from, if it is not, showing commutation failure in other AC system voltages
Support under voluntarily recover, otherwise it is assumed that direct current there occurs persistence commutation failure, need direct current reliability locking.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and processing technology etc. are all
Can be what is be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded
Outside protection scope of the present invention.
Claims (4)
1. a kind of commutation failure blocking method based on dynamic reclosing time sequence, it is characterised in that including herein below：
1) when receiving end electrical network AC system breaks down, record AC fault moment t0；
2) judge whether the AC fault causes commutation failure, if not causing commutation failure, without the need for locking direct current；Otherwise it is assumed that
Cause commutation failure, into step 3)；
3) chopper disconnects and carries out automatic reclosing operation in reclosing setting time T, if in moment t=t0+ T overlaps
Lock success, shows that the AC fault is transient fault, and commutation failure voluntarily can recover after failure vanishes, straight without the need for locking
Stream, otherwise it is assumed that the AC fault is permanent fault, into step 4)；
4) when coinciding with permanent fault, chopper unsuccessful reclosing, subsequently tripping again, wait for a period of time t1, judge when
Carve t=t0+T+t1When whether continue commutation failure, if in moment t=t0+T+t1Commutation failure terminates, shows commutation failure
Voluntarily recover under the support of other AC system voltages, without the need for locking direct current, otherwise it is assumed that direct current there occurs lasting commutation
Failure, locking direct current；Wherein, t1Represent the time margin needed for the complete tripping factor of consideration chopper.
2. a kind of commutation failure blocking method based on dynamic reclosing time sequence as claimed in claim 1, it is characterised in that right
In single feed-in or many feed-ins area, direct current drop point electrical distance is regional farther out, and the automatic reclosing time T of chopper is：
T=(tp.2+tQF2+tu)-(tp.1+tQF1)
In formula, tp.1Represent that the movement time of I sections, t are protected in this sidep.2Represent the movement time of offside II sections protection, tQF1、tQF2For
The movement time of both sides chopper, tuRepresent chopper, the quenching time of trouble point.
3. a kind of commutation failure blocking method based on dynamic reclosing time sequence as claimed in claim 1, it is characterised in that right
In removing the direct current drop point electrical distance intensive direct current area of regional other many feed-ins farther out, the automatic reclosing time of chopper
T=max (T1、T2), wherein,
T1=(tp.2+tQF2+tu)-(tp.1+tQF1)
In formula, tp.1Represent that the movement time of I sections, t are protected in this sidep.2Represent the movement time of offside II sections protection, tQF1、tQF2For
The movement time of both sides chopper, tuRepresent chopper, the quenching time of trouble point；
T2=0.625N-0.125
In formula, N represents electrical network feed-in extra-high voltage direct-current bar number.
4. a kind of commutation failure blocking method based on dynamic reclosing time sequence as described in any one of claims 1 to 3, which is special
Levy and be, judge whether AC fault causes commutation failure based on blow-out angle, by receiving end electrical network AC system actual arc angle r be
The critical extinction angle r of system settingminIt is compared, if r<rmin, then it represents that cause commutation failure, otherwise do not cause commutation to lose
Lose.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199402A (en) * | 2017-12-08 | 2018-06-22 | 国网青海省电力公司 | A kind of DC transmission system commutation failure fault recovery method |
| CN109149614A (en) * | 2018-08-20 | 2019-01-04 | 西安交通大学 | A kind of alternating current-direct current combined hybrid system alternating current circuit reclosing mode setting method |
| CN109193593A (en) * | 2018-11-06 | 2019-01-11 | 西安交通大学 | Serial-parallel power grid exchanges the adaptive reclosing time sequence control method of parallel double transmission line on the same tower |
| CN112886532A (en) * | 2021-01-15 | 2021-06-01 | 国网河南省电力公司电力科学研究院 | Power transmission line self-adaptive reclosing method and system based on multi-source information |
| CN113612190A (en) * | 2021-07-29 | 2021-11-05 | 中国电力科学研究院有限公司 | Method and system for executing alternating current line reclosing based on safety margin index |
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| CN109149614B (en) * | 2018-08-20 | 2020-08-18 | 西安交通大学 | Method for setting AC line reclosing mode of AC/DC hybrid system |
| CN109193593A (en) * | 2018-11-06 | 2019-01-11 | 西安交通大学 | Serial-parallel power grid exchanges the adaptive reclosing time sequence control method of parallel double transmission line on the same tower |
| CN112886532A (en) * | 2021-01-15 | 2021-06-01 | 国网河南省电力公司电力科学研究院 | Power transmission line self-adaptive reclosing method and system based on multi-source information |
| CN112886532B (en) * | 2021-01-15 | 2022-07-26 | 国网河南省电力公司电力科学研究院 | Power transmission line self-adaptive reclosing method and system based on multi-source information |
| CN113612190A (en) * | 2021-07-29 | 2021-11-05 | 中国电力科学研究院有限公司 | Method and system for executing alternating current line reclosing based on safety margin index |
| CN113612190B (en) * | 2021-07-29 | 2023-10-13 | 中国电力科学研究院有限公司 | Method and system for executing reclosing of alternating current line based on safety margin index |
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