CN108899864A - The adaptive reclosing method of distribution line and nature of trouble recognition methods - Google Patents
The adaptive reclosing method of distribution line and nature of trouble recognition methods Download PDFInfo
- Publication number
- CN108899864A CN108899864A CN201810644328.5A CN201810644328A CN108899864A CN 108899864 A CN108899864 A CN 108899864A CN 201810644328 A CN201810644328 A CN 201810644328A CN 108899864 A CN108899864 A CN 108899864A
- Authority
- CN
- China
- Prior art keywords
- phase
- fault
- reclosing
- route
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to the adaptive reclosing method of distribution line and nature of trouble recognition methods, reclosing control is carried out according to different fault types, and, capacitor is put into the alternate circuit of relevant failure, and three-phase current after sensing capacitor investment, judge whether route occurs permanent fault according to the relationship that electric current meets, otherwise the lock-reclosing lock when permanent fault occurs opens reclosing.A kind of external equipment --- capacitor added is pertained only in this method, input cost is lower, and, this method process is simple, only it need to judge that faulty line failure is instantaneity or permanent in the relationship between investment capacitor post analysis three-phase current, without carrying out very complicated operation, without establishing very complicated equation.Calculating process is very simple, and the corresponding reliability when implementing is higher, and control system burden in the corresponding software program of execution this method is lighter, and control system is lower to the hardware requirement of control system without undertaking heavier computational burden.
Description
Technical field
The present invention relates to the adaptive reclosing method of distribution line and nature of trouble recognition methods.
Background technique
Since line fault is in the majority with transient fault, when transient fault occurs for route, reclosing can fast quick-recovery
System power supply substantially increases the power supply reliability of power grid.It, will after reclosing movement but when permanent fault occurs for route
The second Secondary Shocks are brought to system, this is unfavorable for the service life of breaker and the stability of power grid itself.
A kind of power distribution network phase-to phase fault is disclosed in the Chinese patent application file that application publication number is CN107394757A
Fault-free recognition methods, includes the following steps before being overlapped：(1) to route between coincidence early period after acquisition distribution network line breaks down
Three-phase voltage instantaneous sampling value, route beginning three-phase current, the shunt capacitor group three-phase current of parallel capacitor calculate
Phase voltage is poor, route phase current, phase differential current and its first-order difference, and (2) are using phase voltage difference and phase differential current construction about event
Hinder circuit substitutional resistance and fault distance parameter identifies equation, and establishes redundant equation group and calculate fault loop substitutional resistance and event
Hinder distance, then sequentially elapse data window, obtain the sequence of identified parameters, fault-free identifies before (3) are overlapped using phase-to phase fault
Criterion carries out malfunction examination, and when judge failure for transient fault, reclosing is acted, when being judged as permanent fault
When, reclosing is failure to actuate.
Although this method can judge the type of failure, and carry out reclosing operation according to fault type, this method
Process is troublesome, is directed to many parameters, and it also requires very complicated calculating is carried out, such as：Utilize the alternate event of power distribution network
The time domain specification for hindering the voltage of parallel capacitor after three-phase tripping, electric current, establish failure phase circuit about arc resistance
With the identification equation of abort situation, nature of trouble identification is carried out according to the amplitude of the arc resistance of calculating and change rate feature, etc.
Deng.The cumbersome correspondence of process reliability when implementing is lower, and control system is born very in the corresponding software program of execution this method
Weight is very high to the hardware requirement of control system.
Summary of the invention
The object of the present invention is to provide a kind of adaptive reclosing methods of distribution line, to solve existing reclosing side
The comparatively laborious problem of the process of method.Present invention simultaneously provides a kind of distribution line failure property identification methods.
To achieve the above object, the present invention includes following technical scheme.
A kind of adaptive reclosing method of distribution line, the weight including for fault type being asymmetric phase fault
Close a floodgate strategy and/or the reclosing strategy for fault type for symmetrical three phase short circuit fault：
It is described to include the following steps for the reclosing strategy that fault type is asymmetric phase fault：
(1) be first shorted any failure phase with normal phase alternate circuit, then corresponding alternate time in two to break down
Road puts into capacitor；
(2) three-phase current after sensing capacitor investment, compares the median and minimum value in three-phase current, if median is big
In the minimum value of setting multiple, then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
(3) the lock-reclosing lock when permanent fault occurs for route, the open reclosing when transient fault occurs for route；
It is described to include the following steps for the reclosing strategy that fault type is symmetrical three phase short circuit fault：
1) in failure, the corresponding alternate circuit of line voltage the smallest two puts into capacitor；
2) three-phase current after sensing capacitor investment, compares the maximum current and setting electric current threshold value in three-phase current, if
Maximum current is greater than setting electric current threshold value, then judges that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
3) the lock-reclosing lock when permanent fault occurs for route, the open reclosing when transient fault occurs for route.
It is asymmetric phase fault for fault type, according to the phase selection of failure as a result, elder generation before reclosing movement
Be shorted any failure phase with normal phase alternate circuit, then in the two corresponding alternate circuits investment capacitors to break down,
The transient characteristic of three-phase current after being put into according to capacitor compares median and minimum value in three-phase current, according to centre
Size relation identification line fault between value and the minimum value for setting multiple is instantaneity or permanent, if instantaneously
Property failure then open reclosing, if permanent fault then lock-reclosing lock.It is symmetrical three-phase shortcircuit event for fault type
Barrier, according to the phase selection of failure as a result, two corresponding alternate circuit in office puts into capacitor, according to capacitor before reclosing movement
The transient characteristic of three-phase current after device investment, that is, compare the maximum current and setting electric current threshold value in three-phase current, according to maximum
The size relation identification line fault of electric current and setting electric current threshold value is instantaneity or permanent, if transient fault
Reclosing is then opened, if permanent fault then lock-reclosing lock.A kind of external equipment added is pertained only in this method ---
Capacitor, in addition to this, without increasing other equipment, input cost is lower, moreover, this method process is simple, need to only throw
Enter the relationship between capacitor post analysis three-phase current to judge that faulty line failure is instantaneity or permanent, is not necessarily to
Very complicated operation is carried out, without establishing very complicated equation.Calculating process is very simple, the corresponding reliability when implementing compared with
Height, control system burden in the corresponding software program of execution this method is lighter, and control system is negative without undertaking heavier operation
Load, it is lower to the hardware requirement of control system.
A kind of distribution line failure property identification method, the event including for fault type being asymmetric phase fault
Hinder property identification strategy and/or the nature of trouble recognition strategy for fault type for symmetrical three phase short circuit fault：
It is described to include the following steps for the nature of trouble recognition strategy that fault type is asymmetric phase fault：
(1) be first shorted any failure phase with normal phase alternate circuit, then corresponding alternate time in two to break down
Road puts into capacitor；
(2) three-phase current after sensing capacitor investment, compares the median and minimum value in three-phase current, if median is big
In the minimum value of setting multiple, then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
It is described to include the following steps for the nature of trouble recognition strategy that fault type is symmetrical three phase short circuit fault：
1) in failure, the corresponding alternate circuit of line voltage the smallest two puts into capacitor；
2) three-phase current after sensing capacitor investment, compares the maximum current and setting electric current threshold value in three-phase current, if
Maximum current is greater than setting electric current threshold value, then judges that permanent fault occurs for route, otherwise judges that transient fault occurs for route.
Detailed description of the invention
Fig. 1 is the equivalent circuit diagram of the corresponding transient fault of asymmetric phase fault；
Fig. 2 is the equivalent circuit diagram of the corresponding permanent fault of asymmetric phase fault；
Fig. 3 is the equivalent circuit diagram of the corresponding transient fault of symmetrical three phase short circuit fault；
Fig. 4 is the equivalent circuit diagram of the corresponding permanent fault of symmetrical three phase short circuit fault；
Fig. 5 is the implementing circuit wiring schematic diagram that distribution line is adaptively overlapped brake system.
Specific embodiment
The adaptive reclosing method embodiment of distribution line
The applicable fault type of the adaptive reclosing method of distribution line provided in this embodiment is asymmetric phase fault
Failure and symmetrical three phase short circuit fault, therefore, it is not that the adaptive reclosing method of the distribution line, which includes for fault type,
The reclosing strategy of symmetrical phase fault and/or for fault type be symmetrical three phase short circuit fault reclosing plan
Slightly, that is to say, that the reclosing method may include any one in above-mentioned two reclosing strategy, can also include simultaneously
The two reclosing strategies, the present embodiment is for including simultaneously the two reclosing strategies.
Include the following steps for the reclosing strategy that fault type is asymmetric phase fault：(1) it is first shorted and appoints
One failure phase alternate circuit with normal phase, then in the two corresponding alternate circuit investment capacitors to break down, that is,
Say, AB is alternate for setting, BC it is alternate it is alternate with CA in, failure is mutually first alternate, and it is finally third that sequence, which is second alternate backward,
It is alternate, the both ends of the first alternate connection capacitor；Second is alternate alternate with third there are two types of processing mode：One, second is alternate short
Even, the alternate not wiring of third；Two, the second alternate not wiring, the alternate short circuit of third；(2) three-phase current after sensing capacitor investment
(here, capacitor investment point and alternate short circuit point are between line switching and CT, three-phase after being put by CT sensing capacitor
Electric current), then, fault characteristic is identified according to three-phase current transient characteristic：Using principle of relativity, compare the centre in three-phase current
Value Imid and minimum value Imin, if median is greater than minimum value (the i.e. Imid of setting multiple>K*Imin, k is to set not here
Symmetry coefficient generally takes 3~10), then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route；(3)
The lock-reclosing lock when permanent fault occurs for route, the open reclosing when transient fault occurs for route.In addition, above-mentioned
In, AB is alternate for setting, BC it is alternate it is alternate with CA in, failure is mutually first alternate, and it is finally third that sequence, which is second alternate backward,
It is alternate, therefore, first is alternate, second is alternate and alternate, the BC alternate and CA alternate corresponding relationship alternate with AB of third not only
One.
Include the following steps for the reclosing strategy that fault type is symmetrical three phase short circuit fault：1) line in failure
The corresponding alternate circuit of voltage the smallest two puts into capacitor；2) sensing capacitor investment after three-phase current, detection mode with
Upper section is identical, then, identifies fault characteristic according to three-phase current transient characteristic：Differentiated using absolute, is compared in three-phase current
Maximum current Imax and setting electric current threshold value Iset, if maximum current Imax is greater than setting electric current threshold value Iset (i.e. Imax>
Iset), then judge that permanent fault occurs for route, otherwise judge that transient fault occurs for route；3) when route occurs permanently
Fail lockout reclosing, the open reclosing when transient fault occurs for route.
In above-mentioned two reclosing strategy, the capacitor of investment is charged capacitor.
Certainly, it before implementing the reclosing method, needs first to judge fault type, due to the judgment mode category of fault type
In routine techniques, and it is unrelated with protection point of the invention, it just no longer illustrates here, such as：Judged according to negative sequence voltage
Fault type, when line fault, if negative sequence voltage U2 is greater than a setting value (such as 6V), be judged to asymmetric phase fault therefore
Hinder and select the lesser two-phase of line voltage for failure phase, is otherwise symmetrical three phase short circuit fault.Moreover, the judgement of fault type
Process and reclosing method are two independent method processes, and the deterministic process of fault type can be one of reclosing method
Point, it may not be a part of reclosing method.
A kind of specific example of above two reclosing strategy is provided individually below.
It is asymmetric phase fault for fault type：
Asymmetric phase fault is by taking AB phase-to phase fault as an example.So, the two-phase to break down is exactly A phase and B phase, C
It is exactly mutually normal phase.So, among the above, first is alternate alternate for AB, and second is alternate alternate for BC, and alternate third is that CA is alternate.
Being shorted any failure phase, alternate circuit (i.e. any non-faulting alternate circuit) is exactly that be shorted A phase alternate with C phase with normal phase
Circuit or be shorted B phase with C phase alternate circuit, then in two corresponding alternate circuit (i.e. alternate time of the failures to break down
Road) investment capacitor be exactly the alternate circuit of A phase and B phase put into capacitor, as shown in the figures 1 and 2.
Three-phase current feature when by Fig. 1 and Fig. 2 with AB phase-to phase fault analysis permanent fault and transient fault, such as
Under：
As shown in Figure 1, fault loop insulation recovery, capacitor passes through load resistance when transient fault occurs for route
By the opposite BC phase discharge of A, due to three-phase impedance loop near symmetrical, so there is following characteristics：IB=IC=0.5IA, i.e.,：Three-phase
Interphase current values and minimum phase current numerical value in electric current are of substantially equal.
As shown in Fig. 2, if fault point transition impedance is Z, Z is much smaller than load impedance when permanent fault occurs for route
Zfh, capacitor is by load impedance Zfh and fault point transition impedance Z by the opposite BC phase discharge of A, and three-phase impedance loop is not at this time
It is symmetrical again, there are following characteristics：IB=IA1+0.5IA2, IC=0.5IA2, since transition impedance Z is much smaller than load impedance Zfh, therefore
IA1 is much larger than IA2, so IB is much larger than IC.I.e.：Interphase current values in three-phase current are much larger than minimum phase current number
Value.
Therefore, permanent fault identical criterion can be constructed：IA, IB, IC are ranked up, respectively maximum value Imax, in
Between value Imid and minimum value Imin, if meeting Imid>K*Imin indicates that median is much larger than minimum value, then is judged to permanent event
Barrier, wherein k is asymmetric threshold value, generally takes 3~10, otherwise, otherwise judges that transient fault occurs for route.
So, the lock-reclosing lock when permanent fault occurs for route, it is open when transient fault occurs for route to be overlapped
Lock.
It is symmetrical three phase short circuit fault for fault type：
When failure is in symmetrical three phase short circuit fault, in failure, the corresponding alternate circuit of line voltage the smallest two is thrown
Enter capacitor, such as：If the voltage between phases of A phase and B phase is minimum, capacitor is put into the alternate circuit of A phase and B phase.
That is, setting AB is alternate, BC it is alternate it is alternate with CA in, the smallest failure of line voltage is mutually first alternate when failure, sequence
It is second alternate backward, is finally that third is alternate, then, the both ends of the first alternate connection capacitor, the second alternate and third phase
Between not wiring.Certainly, first alternate, second is alternate and alternate, the BC alternate and CA alternate corresponding relationship alternate with AB of third simultaneously
It is not unique.
As shown in figure 3, capacitor discharge impedance loop is that load impedance and route hinder when transient fault occurs for route
The sum of resist.As shown in figure 4, when permanent fault occurs for route, the impedance in capacitor discharge circuit is only route head end to former
Hinder the line impedance of point.As it can be seen that the impedance in capacitor discharge circuit is far smaller than transient fault when permanent fault, i.e., permanently
Property failure when capacitor discharge current be much larger than transient fault when discharge current.
Therefore permanent fault identical criterion can be constructed：One current ration (i.e. current threshold) Iset is set, finds three
Maximum phase current Imax in phase current, as maximum phase current Imax>When Iset, it is judged to permanent fault, is otherwise judged to instantaneous
Property failure.
So, the lock-reclosing lock when permanent fault occurs for route, it is open when transient fault occurs for route to be overlapped
Lock.
Based on the above method, a kind of physical circuit form for implementing this method is given below, certainly, the present invention does not limit to
In the circuit structure.
As shown in figure 5, A phase passes through the anode of the first connection line connection capacitor, B phase passes through the connection of the second connection line
The anode of capacitor, C phase pass through the cathode of third connection line connection capacitor, and B phase passes through the 4th connection line connection capacitor
The cathode of device, string sets switch K1 in the first connection line, goes here and there in the second connection line and sets switch K2, goes here and there and set in third connection line
Switch K3, string sets switch K4 in the 4th connection line, and capacitor is arranged on the alternate circuit of B phase and C phase.This four switches can
To be controllable high-speed switch, distribution line respectively switchs disconnections when operating normally, and when switch disconnection should have enough insulating properties
Energy.
Certainly, for three-phase current after sensing capacitor investment, system further includes current detection module, due to current detecting
Module can use existing current detecting equipment, just no longer illustrate here.
Since state of the capacitor in investment is charged state, charged capacitor can be direct plungeed into
Device can also put into the capacitor not charged, using charge circuit to its online charging.In the present embodiment, in order to capacitor
Device charges, and system further includes capacitor charge circuit, which connects capacitor, capacitor charging circuit
Upper string is equipped with charge switch and power supply.As a specific embodiment, as shown in figure 5, on capacitor charging circuit
String is equipped with normally closed relay contact J1 and J2, current-limiting resistance R and diode D, wherein current-limiting resistance R can use 22 Ω, by charging electricity
Stream is limited in 10A；Normally closed relay contact J1 and J2 is that a secondary normally closed relay of reclosing device is outputed, and charge circuit is just
Often relay contact closure charges to capacitor when operation, disconnects charge circuit when capacitor puts into distribution line；F is fusing
Device.
When route operates normally, switch K1, K2, K3 and K4 are disconnected, and capacitor does not access distribution system, relay
J1, J2 node closure, connect capacitor charge circuit, charge to capacitor.
When line fault, fault type is judged, provide a kind of specific embodiment here：If negative sequence voltage U2>6V, then
Be judged to unbalanced fault and the two-phase for selecting line voltage small be failure phase, otherwise for three phase short circuit fault (this part it is above-mentioned
It is described, just no longer illustrates here).
Then, starting recloser controls relay J1 and J2, breaking capacitance device charge circuit.
Identify that failure is separate when line fault.
It is separate according to failure if asymmetric phase fault, (it is shown in Table 1, table 1 is reclosing by control K1~K4
Switch and relay status under each operating condition in the process), first it is shorted the alternate circuit of any non-faulting；If three phase short circuit fault,
It is separate according to failure, by controlling K1~K4 (being shown in Table 1), the switch of capacitor two sides is closed, capacitor is put into fault loop.
Identified whether according to three-phase current feature as permanent fault；If permanent fault, tripping K1~K4, locking weight
It closes a floodgate；If transient fault, tripping K1~K4, open reclosing.
Above-mentioned two sections of corresponding realization processes hereinbefore have been presented for describing in detail, here just no longer specifically
It is bright.
Table 1
Therefore, the corresponding control strategy of the corresponding switch investment situation of each operating condition in table 1 is exactly that distribution line is adaptive
Reclosing method.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention
The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.
Distribution line failure property identification embodiment of the method
The present embodiment provides a kind of distribution line failure property identification methods, including alternate for asymmetry for fault type
The nature of trouble recognition strategy of short trouble and/or for fault type be symmetrical three phase short circuit fault nature of trouble identify
Strategy：
Include the following steps for the nature of trouble recognition strategy that fault type is asymmetric phase fault：
(1) be first shorted any failure phase with normal phase alternate circuit, then corresponding alternate time in two to break down
Road puts into capacitor；
(2) three-phase current after sensing capacitor investment, compares the median and minimum value in three-phase current, if median is big
In the minimum value of setting multiple, then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route.
Include the following steps for the nature of trouble recognition strategy that fault type is symmetrical three phase short circuit fault：
1) in failure, the corresponding alternate circuit of line voltage the smallest two puts into capacitor；
2) three-phase current after sensing capacitor investment, compares the maximum current and setting electric current threshold value in three-phase current, if
Maximum current is greater than setting electric current threshold value, then judges that permanent fault occurs for route, otherwise judges that transient fault occurs for route.
That is, the distribution line failure property identification method can be as the adaptive reclosing method of distribution line
A part is identifying nature of trouble (i.e. permanent fault or transient fault) by distribution line failure property identification method
And then reclosing control is carried out according to permanent fault or the corresponding reclosing mode of transient fault.Matched due to above-mentioned
The distribution line failure property identification method is described in detail in the adaptive reclosing method embodiment of electric line,
Here it just no longer illustrates.
Claims (2)
1. a kind of adaptive reclosing method of distribution line, which is characterized in that including being asymmetric alternate short for fault type
The reclosing strategy of road failure and/or for fault type be symmetrical three phase short circuit fault reclosing strategy：
It is described to include the following steps for the reclosing strategy that fault type is asymmetric phase fault：
(1) be first shorted any failure phase with normal phase alternate circuit, then thrown in the two corresponding alternate circuits broken down
Enter capacitor；
(2) three-phase current after sensing capacitor investment, compares the median and minimum value in three-phase current, sets if median is greater than
Determine the minimum value of multiple, then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
(3) the lock-reclosing lock when permanent fault occurs for route, the open reclosing when transient fault occurs for route；
It is described to include the following steps for the reclosing strategy that fault type is symmetrical three phase short circuit fault：
1) in failure, the corresponding alternate circuit of line voltage the smallest two puts into capacitor；
2) three-phase current after sensing capacitor investment, compares the maximum current and setting electric current threshold value in three-phase current, if maximum
Electric current is greater than setting electric current threshold value, then judges that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
3) the lock-reclosing lock when permanent fault occurs for route, the open reclosing when transient fault occurs for route.
2. a kind of distribution line failure property identification method, which is characterized in that including being asymmetric alternate short for fault type
The nature of trouble recognition strategy of road failure and/or for fault type be symmetrical three phase short circuit fault nature of trouble identify plan
Slightly：
It is described to include the following steps for the nature of trouble recognition strategy that fault type is asymmetric phase fault：
(1) be first shorted any failure phase with normal phase alternate circuit, then thrown in the two corresponding alternate circuits broken down
Enter capacitor；
(2) three-phase current after sensing capacitor investment, compares the median and minimum value in three-phase current, sets if median is greater than
Determine the minimum value of multiple, then judge that permanent fault occurs for route, otherwise judges that transient fault occurs for route；
It is described to include the following steps for the nature of trouble recognition strategy that fault type is symmetrical three phase short circuit fault：
1) in failure, the corresponding alternate circuit of line voltage the smallest two puts into capacitor；
2) three-phase current after sensing capacitor investment, compares the maximum current and setting electric current threshold value in three-phase current, if maximum
Electric current is greater than setting electric current threshold value, then judges that permanent fault occurs for route, otherwise judges that transient fault occurs for route.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644328.5A CN108899864B (en) | 2018-06-21 | 2018-06-21 | The adaptive reclosing method of distribution line and nature of trouble recognition methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644328.5A CN108899864B (en) | 2018-06-21 | 2018-06-21 | The adaptive reclosing method of distribution line and nature of trouble recognition methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108899864A true CN108899864A (en) | 2018-11-27 |
| CN108899864B CN108899864B (en) | 2019-07-30 |
Family
ID=64345763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810644328.5A Active CN108899864B (en) | 2018-06-21 | 2018-06-21 | The adaptive reclosing method of distribution line and nature of trouble recognition methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108899864B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157844A (en) * | 2020-01-06 | 2020-05-15 | 许昌许继软件技术有限公司 | Distribution line self-adaptive reclosing method and fault property identification method and device |
| CN112332385A (en) * | 2020-10-28 | 2021-02-05 | 西安工程大学 | Detection type permanent fault discrimination method before inter-phase coincidence of power distribution network |
| CN114024293A (en) * | 2021-09-23 | 2022-02-08 | 广东核电合营有限公司 | Nuclear power station transmission line tripping processing system and method and storage medium |
| CN114089097A (en) * | 2021-10-25 | 2022-02-25 | 珠海许继电气有限公司 | Distribution line ground fault property identification and recovery method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157922A (en) * | 2011-02-12 | 2011-08-17 | 上海市电力公司 | Reactance relay and re-closing method |
| CN105572533A (en) * | 2015-12-17 | 2016-05-11 | 珠海博威电气有限公司 | Method for identifying transient fault and permanent fault |
| CN107394757A (en) * | 2017-09-13 | 2017-11-24 | 国家电网公司 | Fault-free recognition methods before a kind of power distribution network phase-to phase fault overlaps |
| CN107478958A (en) * | 2017-09-07 | 2017-12-15 | 国家电网公司 | A kind of method for identifying distribution line short circuit permanent fault and transient fault of being discharged using capacitor energy storage |
-
2018
- 2018-06-21 CN CN201810644328.5A patent/CN108899864B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157922A (en) * | 2011-02-12 | 2011-08-17 | 上海市电力公司 | Reactance relay and re-closing method |
| CN105572533A (en) * | 2015-12-17 | 2016-05-11 | 珠海博威电气有限公司 | Method for identifying transient fault and permanent fault |
| CN107478958A (en) * | 2017-09-07 | 2017-12-15 | 国家电网公司 | A kind of method for identifying distribution line short circuit permanent fault and transient fault of being discharged using capacitor energy storage |
| CN107394757A (en) * | 2017-09-13 | 2017-11-24 | 国家电网公司 | Fault-free recognition methods before a kind of power distribution network phase-to phase fault overlaps |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157844A (en) * | 2020-01-06 | 2020-05-15 | 许昌许继软件技术有限公司 | Distribution line self-adaptive reclosing method and fault property identification method and device |
| CN112332385A (en) * | 2020-10-28 | 2021-02-05 | 西安工程大学 | Detection type permanent fault discrimination method before inter-phase coincidence of power distribution network |
| CN114024293A (en) * | 2021-09-23 | 2022-02-08 | 广东核电合营有限公司 | Nuclear power station transmission line tripping processing system and method and storage medium |
| CN114024293B (en) * | 2021-09-23 | 2024-01-26 | 广东核电合营有限公司 | Nuclear power station transmission line tripping processing system, method and storage medium |
| CN114089097A (en) * | 2021-10-25 | 2022-02-25 | 珠海许继电气有限公司 | Distribution line ground fault property identification and recovery method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108899864B (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108899864B (en) | The adaptive reclosing method of distribution line and nature of trouble recognition methods | |
| Hooshyar et al. | Fault type classification in microgrids including photovoltaic DGs | |
| US20080211511A1 (en) | Method of Generating Fault Indication in Feeder Remote Terminal Unit for Power Distribution Automation System | |
| US10923906B2 (en) | Fault switch configuration and clearing method in flexible DC converter station | |
| CN101701998A (en) | Novel faulty line selection method in low current faulty grounding system | |
| Haleem et al. | Fault-type discrimination in HVDC transmission lines using rate of change of local currents | |
| CN109038520B (en) | Method for identifying AC/DC fault in converter station and protecting and coordinating AC/DC fault in converter station | |
| CN110661238A (en) | Multi-terminal flexible direct-current power distribution network protection method based on current-limiting inductive voltage | |
| CN103414173B (en) | Method for performing fault recovery on power distribution network based on ultra-short term load | |
| CN109617027B (en) | High-frequency sudden-change distance protection method for flexible direct-current power distribution system | |
| CN110739668B (en) | Flexible direct-current power grid short-circuit fault property judging method and reclosing method | |
| CN109119975B (en) | Direct current system and failure protection method of circuit breaker in starting process of direct current system | |
| EP3443651A1 (en) | Voltage source converter | |
| CN107064714B (en) | MMC-HVDC electric transmission line fault detection method based on unilateral transient current | |
| CN109119964B (en) | Intelligent controller for preventing switch tripping coil from burning | |
| US7579712B2 (en) | Power system protection system | |
| Ebrahim et al. | An algorithm for detection of fault, islanding, and power swings in dg-equipped radial distribution networks | |
| CN111157844A (en) | Distribution line self-adaptive reclosing method and fault property identification method and device | |
| CN113013880A (en) | Fault processing method based on 5G communication module distribution line | |
| CN110187201B (en) | Direct current commutation failure judgment method considering alternating current and direct current interaction | |
| CN108923392B (en) | Permanent fault recognition-based local feeder fault isolation method and system | |
| Zheng et al. | An adaptive reclosing scheme based on phase characteristics for MMC-HVDC systems | |
| EP3391489B1 (en) | Ground fault detection and interrupt system | |
| CN109672206A (en) | A kind of Hybrid HVDC system and its inverter of connecting put into device and method | |
| CN100362718C (en) | Fault-tolerant complex judging self adaption high voltage parallel reactor turn-to-turn protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |