CN108123424B - A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity - Google Patents
A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity Download PDFInfo
- Publication number
- CN108123424B CN108123424B CN201711479762.4A CN201711479762A CN108123424B CN 108123424 B CN108123424 B CN 108123424B CN 201711479762 A CN201711479762 A CN 201711479762A CN 108123424 B CN108123424 B CN 108123424B
- Authority
- CN
- China
- Prior art keywords
- interlocking
- current protection
- protection
- power supply
- looped network
- 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.)
- Active
Links
Classifications
-
- 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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
- H02H7/28—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 for meshed systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of ring network power supply relay protecting methods for taking into account quick-action and selectivity; suitable for unilateral ring network power supply system; between the current protection of traditional reciprocal interlocking; by mutually send block signal realize interlocking current protection on the basis of; allow signal to realize interlocking current protection by mutually sending, improves quick-action and selectivity.It is matched with traditional interlocking enclosed type current protection, constitutes complete looped network interlocking current protection.
Description
Technical field
The present invention relates to a kind of relay protecting methods that can be applied to ring network power supply system, belong to protection control field.
Background technique
Optical-fiber longitudinal difference is usually arranged as main guarantor in ring network power supply system, such as urban track traffic exchange Medium voltage power supply system
Shield, while specified time overcurrent protection is set as back-up protection according to staged principle, the two combines, and constitutes complete protection.
Since there is the requirement in maximum allowable time limit in the main transformer station to power supply of urban orbit traffic, so according to the setting of staged principle
Definiting time-lag overcurrent protection series cannot be too many, to guarantee that the time limit does not exceed the requirement of main transformer station.Urban track traffic at present
Optical-fiber longitudinal difference is generallyd use as main protection in middle pressure ring net inlet-outlet line, while specified time overcurrent is set according to staged principle and is protected
Shield is used as back-up protection, and the two combines, and constitutes complete protection.Since there is maximum in the main transformer station to power supply of urban orbit traffic
Allow the requirement in time limit, so cannot be too many according to the specified time overcurrent protection series that staged principle is arranged.Relay protection factory
Family takes certain methods, typically prevents overcurrent protection from malfunctioning by mutually sending block signal.Mutually send
Signal has contact mode, also has by communicating such as GOOSE mode.The logic chart of the typical mode for mutually sending block signal
As depicted in figs. 1 and 2.For simplicity, following block diagram only draws A phase, and B phase, C phase, zero sequence similarly, are no longer drawn.
But this mutual mode for sending block signal, if for various reasons (such as when interlocking using contact mode,
It may be the relay failure etc. that connecting line loosened or be broken, controlled contact folding, when interlocking is using communication modes, it may be possible to
Exchange fault, network connection are loosened or are broken), block signal is not received, then according to the logic of Fig. 2, then can be moved
Make.If malfunction in order to prevent, " interlocking enclosed type current protection time " this time definite value setting length, but protection will lead to
Slow motion, excision failure are slow；If " interlocking enclosed type current protection time " this time definite value setting is short, possibility is protected
Malfunction.
Summary of the invention
To solve the above problems, the present invention provides a kind of relay protecting method for taking into account quick-action and selectivity.
A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity is suitable for unilateral ring network power supply system,
The following steps are included:
1) criterion for mutually sending and allowing signal is arranged in protective relaying device: breaker is in coincidence and voltage is less than
It when voltage rating, or receives block signal and electric current and is less than definite value, then send out permission signal；
2) the setting interlocking permissive type current protection operating criterion in protective relaying device: permission signal is received, electric current is big
In interlocking current protection definite value, by interlocking the delay of permissive type current protection time, trip protection beneficial effect.
Beneficial effect
The quick-action and selectivity of ring network power supply relay protection are improved using the interlocking permissive type current protection of this method,
It is matched with traditional interlocking enclosed type current protection, constitutes complete looped network interlocking current protection.
Detailed description of the invention
Fig. 1 is hair block signal, locking interlocking A phase current logic chart.
Fig. 2 is interlocking blocking protection logic chart.
Fig. 3 is that hair allows signal, allows to interlock A phase current logic chart.
Fig. 4 is interlocking permissive type relay protective scheme figure.
Fig. 5 is that urban track traffic exchanges Medium voltage power supply system figure.
Specific embodiment
The present invention provides a kind of relay protecting method for taking into account quick-action and selectivity.
In Fig. 3, breaker is in coincidence and voltage less than 70% voltage rating, or receives block signal, and electric current
Less than definite value, then permission signal is sent out.Herein, " Ia < interlocking current protection definite value " be indicate failure not in the front of this protection,
And the necessary condition at the rear of this protection, in order to prevent under normal operating conditions, due to Ia < interlocking current protection definite value,
And frequently send out permission signal, then plus " receiving interlocking A phase block signal " this constraint condition, i.e. this side protection hair allows signal
Premise be receive opposite side protection send block signal, opposite side protection send block signal premise be its " Ia > interlocking electric current
It is latched definite value ", so can just send block signal after necessarily breaking down, allow signal so as to avoid frequent hair above-mentioned
The problem of, but hair allows signal that opposite side to be waited to send block signal here, will lead to time delay, in addition if opposite side is due to certain
Reason without send block signal, then this side will not send permission signal, to solve the above-mentioned problems, increase TWJ=0 and
This open condition of Ua < 70%Un, i.e., at the time of apposition, voltage declines breaker, and " Ia < interlocking current protection is fixed for permission
Value " then sends out permission signal, allows to interlock A phase current.
In Fig. 4 in this mutual mode for sending permission signal, permission signal is only received, electric current is greater than interlocking electric current
Protect definite value, then protecting can just act, so if " interlocking permissive type current protection time " this when limit value setting very
Short, protection will not malfunction.
Electric current is greater than definite value in this way, receives permission signal, then interlock protection quick acting, does not receive block signal, then join
Lock protection acts at a slow speed.
Quickly protection is realized with permissive type, is protected at a slow speed with enclosed type realization.Take into account the quick-action and selectivity of protection.
Technical solution of the present invention applies the case in urban track traffic exchange Medium voltage power supply system, as shown in figure 5,
Looped network inlet-outlet line cabinet DL2 and DL3, DL4 and DL5 configuration optical-fiber longitudinal difference protection are as main protection and with the overcurrent of interlocking
Protection is used as back-up protection.The increased function of its overcurrent protection includes: to protect with protection interlocking permissive type and enclosed type electric current behind
Shield interlocks permissive type and enclosed type current protection with the protection of looped network opposite side.By taking DL4 overcurrent protection as an example, as shown in table 1:
Table 1:DL4 overcurrent protection setting valve
| Definite value title | Recommendation (millisecond) |
| The permissive type current protection time is interlocked with behind protection DL3 | 10 |
| The enclosed type current protection time is interlocked with behind protection DL3 | 250 |
| The permissive type current protection time is interlocked with looped network opposite side protection DL5 | 10 |
| The enclosed type current protection time is interlocked with looped network opposite side protection DL5 | 380 |
Power supply 1 is powered, K2 point failure, and DL5 electric current is more than interlocking current interlock definite value, sends out block signal；DL6 no current,
Block signal is not sent out, the block signal sent due to receiving DL5, or since voltage is lower than 70%Un, allow letter to DL5 transmission
Number；DL5 receives the permission signal of DL6 transmission, and DL5 electric current is more than interlocking current protection definite value, by 10 millisecond time-delay and behind
DL6 interlocking permissive type current protection tripping is protected, failure is cut off.If DL5 does not receive the permission signal of DL6 transmission, do not have yet
There is the block signal for receiving DL6 transmission, DL5 electric current is more than interlocking current protection definite value, is protected by 250 millisecond time-delay and behind
DL6 interlocks the tripping of enclosed type current protection, cuts off failure.Why with behind protection DL6 interlock the enclosed type current protection time
Adjusting is 250 milliseconds, is in order to ensure when the outgoing of mother 5 breaks down, the outgoing trip protection of mother 5 is corresponding
Breaker tripping failure, during this period, if DL5 does not receive the outgoing of protection DL6 or mother 5 behind because of various reasons
Block signal will not malfunction, i.e., will not be to outgoing this next stage failure of mother 5, overstepping, in order to avoid lose choosing
Selecting property.
Power supply 1 is powered, K1 point failure, and DL4 electric current is more than interlocking current interlock definite value, sends out block signal；DL5 no current,
Block signal is not sent out, the block signal sent due to receiving DL4, or since voltage is lower than 70%Un, allow letter to DL4 transmission
Number；DL4 receives the permission signal of DL5 transmission, and DL4 electric current is more than interlocking current protection definite value, by 10 millisecond time-delay and looped network
DL5 interlocking permissive type current protection tripping is protected in opposite side, cuts off failure.If DL4 does not receive the permission signal of DL5 transmission,
The block signal of DL5 transmission is not received, DL4 electric current is more than interlocking current protection definite value, by 380 millisecond time-delay and looped network yet
DL5 interlocking enclosed type current protection tripping is protected in opposite side, cuts off failure.It is protected with looped network opposite side protection DL5 interlocking enclosed type electric current
Protecting time setting is 380 milliseconds, and why adjusting is 380 milliseconds, be in order to ensure when cannot get DL5 block signal, will not
To next stage failure, overstepping, in order to avoid losing selectivity, and feeding out for DL5 and behind protection DL6 or female 5 can be avoided
250 milliseconds of actuation times of the interlocking enclosed type current protection of line.
The foregoing describe the basic principles and main features of this patent and advantages.It should be understood by those skilled in the art that this
Patent is not restricted to the described embodiments, and the above embodiments and description only describe the principles of this patent, not
Under the premise of being detached from this patent spirit and scope, this patent be will also have various changes and improvements, these changes and improvements are both fallen within
Within the scope of claimed this patent.Range is claimed by appended claims and its equivalent circle in this patent.
Claims (5)
1. a kind of ring network power supply relay protecting method for taking into account quick-action and selectivity is suitable for unilateral ring network power supply system,
It is characterized in that, comprising the following steps:
1) criterion for mutually sending and allowing signal, including two kinds of situations are arranged in protective relaying device: one is at breaker
In coincidence and when voltage is less than voltage rating, and electric current is less than interlocking current protection definite value, then sends out permission signal；Another feelings
Condition is to receive block signal and electric current to be less than interlocking current protection definite value, then sends out permission signal；
2) the setting interlocking permissive type current protection operating criterion in protective relaying device: permission signal is received, electric current is greater than connection
Current protection definite value is locked, by interlocking the delay of permissive type current protection time, trip protection.
2. ring network power supply relay protecting method as described in claim 1, it is characterised in that: in step 1), the breaker
Voltage rating of the voltage less than 70%, then it is assumed that circuit breaker voltage is less than voltage rating.
3. ring network power supply relay protecting method as described in claim 1, it is characterised in that: protect looped network inlet-outlet line cabinet with behind
The setting of permissive type current protection time is interlocked to be different from interlocking enclosed type current protection with looped network opposite side protection looped network inlet-outlet line cabinet
Time.
4. ring network power supply relay protecting method as claimed in claim 3, it is characterised in that: protect looped network inlet-outlet line cabinet with behind
Interlocking the enclosed type current protection time is 250 milliseconds, interlocks enclosed type current protection with looped network opposite side protection looped network inlet-outlet line cabinet
Time is 380 milliseconds.
5. ring network power supply relay protecting method as claimed in claim 4, it is characterised in that: protect looped network inlet-outlet line cabinet with behind
Interlocking the permissive type current protection time is 10 milliseconds；When with looped network opposite side protection looped network inlet-outlet line cabinet interlocking permissive type current protection
Between be similarly 10 milliseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479762.4A CN108123424B (en) | 2017-12-29 | 2017-12-29 | A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479762.4A CN108123424B (en) | 2017-12-29 | 2017-12-29 | A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108123424A CN108123424A (en) | 2018-06-05 |
| CN108123424B true CN108123424B (en) | 2019-09-24 |
Family
ID=62232384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711479762.4A Active CN108123424B (en) | 2017-12-29 | 2017-12-29 | A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108123424B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110783898B (en) * | 2019-10-10 | 2022-01-04 | 许昌许继软件技术有限公司 | AC looped network power supply dynamic acceleration overcurrent protection method and protection device |
| CN111224388B (en) * | 2020-02-19 | 2022-02-15 | 国电南瑞科技股份有限公司 | Node interlocking protection method suitable for multiple power supply modes |
| CN115907291B (en) * | 2022-11-11 | 2024-04-05 | 国网安徽省电力有限公司合肥供电公司 | Relay protection constant value performance evaluation method for active power distribution network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913275A (en) * | 2006-07-28 | 2007-02-14 | 天津大学 | Energy position tandem protection method and device for extra-high voltage transmission line |
| CN101707360A (en) * | 2009-11-19 | 2010-05-12 | 四川省电力公司 | Adaptive weak-infeed pilot protection method of transmission line |
| CN103022989A (en) * | 2011-09-28 | 2013-04-03 | 南京南瑞继保电气有限公司 | Digital current protection method for alternating-current looped serial power supply mode of subways |
| CN104184134A (en) * | 2014-09-03 | 2014-12-03 | 广西电网公司电力科学研究院 | Distribution line bi-directional latch-up protection method based on master station decision identification |
| CN104201657A (en) * | 2014-09-03 | 2014-12-10 | 广西电网公司电力科学研究院 | Power direction judgment based bidirectional blocking protection method for distributing line |
| CN104332969A (en) * | 2014-10-28 | 2015-02-04 | 许继电气股份有限公司 | Relay protection method for cascade switching station tie lines |
-
2017
- 2017-12-29 CN CN201711479762.4A patent/CN108123424B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913275A (en) * | 2006-07-28 | 2007-02-14 | 天津大学 | Energy position tandem protection method and device for extra-high voltage transmission line |
| CN101707360A (en) * | 2009-11-19 | 2010-05-12 | 四川省电力公司 | Adaptive weak-infeed pilot protection method of transmission line |
| CN103022989A (en) * | 2011-09-28 | 2013-04-03 | 南京南瑞继保电气有限公司 | Digital current protection method for alternating-current looped serial power supply mode of subways |
| CN104184134A (en) * | 2014-09-03 | 2014-12-03 | 广西电网公司电力科学研究院 | Distribution line bi-directional latch-up protection method based on master station decision identification |
| CN104201657A (en) * | 2014-09-03 | 2014-12-10 | 广西电网公司电力科学研究院 | Power direction judgment based bidirectional blocking protection method for distributing line |
| CN104332969A (en) * | 2014-10-28 | 2015-02-04 | 许继电气股份有限公司 | Relay protection method for cascade switching station tie lines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108123424A (en) | 2018-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108123424B (en) | A kind of ring network power supply relay protecting method for taking into account quick-action and selectivity | |
| CN108376974B (en) | A kind of power distribution network relay protection system based on current limliting Graded coordination | |
| CN109459658B (en) | Method for power distribution master station to judge local feeder automation line fault section | |
| CN106100130B (en) | A kind of guard method of urban track traffic DC power-supply system | |
| CN106300285A (en) | It is independent of the self adaptation type feeder automation fault handling method on the spot of network topology | |
| CN109936121B (en) | 110kV single-bus sectional wiring bus differential protection locking backup power automatic switching protection method | |
| CN103825363B (en) | A kind of wind-light storage low pressure micro-capacitance sensor group protection coordination controller | |
| CN106505529A (en) | A kind of intelligent substation low-voltage bus bar guard method | |
| US10951034B2 (en) | Protection for an HVDC network | |
| CN105245306A (en) | Method and system for switching main and standby synchronous clocks under BC (Basic Control) mode of PTN (Packet Transport Network) synchronous network of wide area protection system | |
| CN202444323U (en) | Feeder automation system based on optical longitudinal differential protection principle | |
| CN104659765A (en) | Channel configuration and protection scheme applied to multi-terminal radiation network of power system | |
| US20160308350A1 (en) | Power system including a circuit providing smart zone selective interlocking communication | |
| Schweitzer et al. | Applying radio communication in distribution generation teleprotection schemes | |
| CN109782125A (en) | A kind of earth-free Single-phase Earth Fault of Power System identification and partition method | |
| CN106410807A (en) | Method for transmitting four kinds of messages of intelligent substation in one physical network based on annular networking | |
| CN104009454A (en) | Power grid regional protection method | |
| CN109613394A (en) | A kind of intelligent distribution making alive time type fault section method of discrimination on the spot | |
| Ward et al. | Redundancy considerations for protective relaying systems | |
| CN206023359U (en) | A kind of standby power switching device | |
| CN104734117B (en) | A kind of breaker fail protection method of substation | |
| EP2301125B1 (en) | Method and system for rearranging sound conductors in parallel lines in power transmission | |
| CN111224388B (en) | Node interlocking protection method suitable for multiple power supply modes | |
| CN108631261B (en) | Control circuit and method for bidirectional monitoring of breaker state | |
| CN108493911B (en) | Pressure ring network protection method in a kind of magnetic floating traffic |
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 |