CN105186450B - The protective relaying device of relay parameter can dynamically be changed - Google Patents
The protective relaying device of relay parameter can dynamically be changed Download PDFInfo
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- CN105186450B CN105186450B CN201510690742.6A CN201510690742A CN105186450B CN 105186450 B CN105186450 B CN 105186450B CN 201510690742 A CN201510690742 A CN 201510690742A CN 105186450 B CN105186450 B CN 105186450B
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- generator
- protective relaying
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/14—Protecting elements, switches, relays or circuit breakers
Abstract
The invention discloses a kind of protective relaying device that can dynamically change relay parameter is provided, technical problems to be solved are that the distributed power grid for making new energy access stablizes safe operation.The present invention is equipped with Generator Status information acquisition device in being connected with the electricity generation system of distributed generator and synchronous generator, and relay protection exchange can dynamically change the protective relaying device of parameter online；Generator Status information acquisition device is communicated with relay protection exchange using communication line 1, and relay protection exchange is communicated with the protective relaying device that can dynamically change parameter online using communication line 2.The present invention is compared with prior art; it can dynamically monitor the operating status of distributed generator; and according to the operating status of distributed generator; dynamic changes the setting valve of protective relaying device in electricity generation system; solve protective relaying device failure, malfunction caused by accessing electricity generation system due to new energy; stability and the safety for improving electricity generation system, improve the stability of network system.
Description
Technical field
The present invention relates to a kind of power system relay protection device, especially one kind to have regenerative resource to access electric system
Protective relaying device.
Technical background
With the getting worse of energy problem, the utilization of new energy have begun to be subject to the people's attention.China
It has begun gradually to develop and use various new energy, such as wind power generation, geother-mal power generation, solar power generation.Various new energy
Access power grid, which is referred to as distributed power grid, can change the topological structure of network, in addition the randomness of new energy, the parameters such as capacity
Change so that power, trend distribution become complicated.In this case, the various protective relaying devices of power grid can fail, malfunction
Make, in some instances it may even be possible to the dead zone protected occur.There are no a kind of preferable solutions for the prior art, therefore are highly desirable to propose
A kind of protective relaying device solves the problems, such as this, so that the distributed power grid that there is new energy to access is stablized safe operation.
Invention content
The object of the present invention is to provide a kind of protective relaying device that can dynamically change relay parameter, the technology to be solved
Problem is that the distributed power grid for making that there is new energy to access stablizes safe operation.
The present invention uses following technical scheme:A kind of protective relaying device that can dynamically change relay parameter, is connecting
Be distributed in the electricity generation system of formula generator and synchronous generator, be equipped with Generator Status information acquisition device, relay protection exchange,
The protective relaying device of parameter can dynamically be changed online；The Generator Status information acquisition device is with relay protection exchange using logical
Believe that circuit 1 communicates, relay protection exchange is communicated with the protective relaying device that can dynamically change parameter online using communication line 2；
The running state information of the Generator Status information acquisition device acquisition distributed generator in the time interval, passes
Pass relay protection exchange；
The relay protection exchange for judging whether the operating status of distributed generator changes, distributed generator
Operating status changes, and relay protection exchange calculates under the operating status, respectively may be used using the running state information obtained
The setting valve protected on the protective relaying device of online dynamic change parameter passes to the relay guarantor that can dynamically change parameter online
Protection unit；
The protective relaying device that parameter can dynamically be changed online can be online according to the instruction of relay protection exchange change
The protective relaying device of dynamic change parameter adjusts value parameter.
The distributed generator of the present invention is that can generate electricity in wind-driven generator, geother-mal power generation machine, solar generator, morning and evening
Machine and/or the electric power source generator by the accumulator of power electronic equipment access with randomness.
The running state information of the present invention is the operating status of distributed generator outlet side：Power generation capacity, goes out impedance value
Whether mouth voltage outlet electric current, accesses electricity generation system, is converted to the information after digital signal.
The present invention time interval be：0 ＜ time intervals≤2s.
The operating status of distributed generator of the present invention does not change, then do not change can dynamically change online parameter after
Setting valve on electrical protective device.
The setting valve of the present invention is that current protection setting valve and voltage adjust protection value.
The protective relaying device that can dynamically change parameter online of the present invention, is connected to distributed generator and busbar
Between, between synchronous generator and busbar, between busbar and busbar, load busbar between, using be distributed formula generator and
Between the electricity generation system and network system of synchronous generator.
The communication line of the present invention uses WLAN or Spanning-Tree Protocol, by network communication protocol TCP/IP communication.
The relay protection exchange of the present invention judges the operation shape of distributed generator according to the running state information received
Whether state changes, and the running state information received is compared with the running state information of last moment, the difference of the two
As a result be less than last moment running state information value 1%, or both difference result consecutive variations, aggregate-value be more than it is unchanged
Change the 1% of moment running state information value, then it is assumed that the operating status of distributed generator and its electricity generation system does not change.
The calculating formula of current protection setting valve of the present invention is：Wherein, K is fault type coefficient, right
In three-phase shortcircuit K=1, line to line faultE is the equivalent electromotive force of electricity generation system, ZsCan dynamically to change parameter online
Protective relaying device installation place to the equiva lent impedance of behind system, ZLFor protected circuit overall length impedance, α is protection domain；
The electricity generation system phase voltage protection calculating formula be：Wherein, ZL1And ZL2For
Line impedance related with protection domain, Krel=1.2 or 1.3 be safety factor, ZS.maxFor under electricity generation system minimum operational mode
System impedance, be line to line fault when system impedance.
Compared with prior art, the present invention can dynamically monitor the operating status of distributed generator, and according to distribution
The operating status of formula generator, dynamic change the setting valve of protective relaying device in electricity generation system, solve to access due to new energy
Protective relaying device failure, malfunction, improve stability and the safety of electricity generation system caused by electricity generation system, final to improve electricity
The stability of net system.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Fig. 2 is the work flow diagram of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.As shown in Figure 1, the present invention's is movable
State changes the protective relaying device of relay parameter, in the electricity generation system (hair for being connected with distributed generator and synchronous generator
Electric system) in, it is equipped with Generator Status information acquisition device S1......Sn, relay protection exchange can dynamically change parameter online
Protective relaying device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6, communication line.
Generator Status information acquisition device S1......Sn is connected between the outlet side of distributed generator and busbar, such as
It is connected with distributed generator S1 on busbar A in Fig. 1.N is the quantity of distributed generator.Distributed generator is sent out for wind-force
Motor, geother-mal power generation machine, solar generator, morning and evening energy generator and/or the accumulator etc. by power electronic equipment access
Electric power source generator with randomness.Generator Status information acquisition device acquires distributed generator in certain time interval
Interior running state information passes to relay protection exchange by communication line 1.Running state information is that distributed generator goes out
The operating status of mouth side：Whether power generation capacity impedance value, exit potential, outlet electric current, accesses electricity generation system, is converted to number
Information after signal, is transmitted for communication line 1 and relay protection exchange calculates.The value of time interval should not value mistake
Greatly, excessive time interval can not accurately obtain the operating status of distributed generator, to obtain effective relay
Protection seting value, time interval also should not value it is too small, too small time interval can make online dynamically to change parameter after
The parameter frequent switching of electrical protective device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6 can not only make online dynamically to change
The protective relaying device loss of parameter increases, and can cause the unstable of electricity generation system, therefore, the time interval of the present embodiment
Value is more than 0 to 2s (0 ＜ time intervals≤2s).
Relay protection exchange uses the kh-ipc610 types industrial personal computer (4U) of Kong Hui Science and Technology Ltd.s of Shenzhen, for sentencing
Whether the operating status of disconnected distributed generator changes.If the operating status of distributed generator does not change, do not change
The setting valve on protective relaying device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6 of parameter can dynamically be changed online, and tied
The running state information and control process of acquisition distributed generator in the beam secondary time interval.If distributed generator
Operating status changes, then is calculated under the operating status using the running state information obtained by relay protection exchange,
It respectively can dynamically change adjusting of being protected on protective relaying device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6 of parameter online
Value, by communication line 2 be delivered separately to online dynamically to change protective relaying device BRK1, BRK2 of parameter, BRK3,
BRK4, BRK5 and BRK6.Setting valve is that current protection setting valve and voltage adjust protection value.
Protective relaying device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6 that parameter can dynamically be changed online, connect respectively
Be connected between distributed generator and busbar, between synchronous generator and busbar, between busbar and busbar, load with busbar it
Between, using being distributed between the electricity generation system and network system of formula generator and synchronous generator.Parameter can dynamically be changed online
Protective relaying device BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6 according to transmitted on communication line 2 come setting valve dynamic
Change its setting valve, i.e., changes the whole of the protective relaying device that can dynamically change parameter online according to the instruction of relay protection exchange
Definite value parameter, and terminate the running state information and control process of the acquisition distributed generator in the secondary time interval.
Communication line is communication line 1 and communication line 2, and communication line 1 is for realizing Generator Status information acquisition device
It is communicated with relay protection exchange, communication line 2 is protected for realizing relay protection exchange with the relay that can dynamically change parameter online
Protection unit communicates.Communication line uses WLAN WLAN or Spanning-Tree Protocol STP, logical by network communication protocol TCP/IP
Letter.Running state information of the Generator Status information acquisition device by collected distributed generator at a certain time interval
Relay protection exchange is passed to, relay protection exchange will control signal and be separately sent to dynamically change the relay guarantor of parameter online
Protection unit BRK1, BRK2, BRK3, BRK4, BRK5 and BRK6.
As shown in Fig. 2, the protective relaying device that can dynamically change relay parameter of the present invention, workflow includes following
Step：
One, Generator Status information acquisition device presses 0 ＜ time intervals≤2s, measures acquisition distributed generator outlet side
Operating status obtains the power generation capacity of generator outlet side, impedance value, exit potential, exports electric current and whether access power generation system
System, will measure collected value and is converted to digital signal, obtain running state information, and running state information, which is sent to relay, protects
Protect exchange.
Two, relay protection exchange judges that the operating status of distributed generator is according to the running state information received
The running state information received is compared, the result of the difference of the two by no change with the running state information of last moment
Less than the 1% of last moment running state information value, then it is assumed that the operating status of distributed generator and its electricity generation system does not have
Change.
If the result consecutive variations of the difference of the two, aggregate-value, which is more than, does not change the 1% of moment running state information value, then
Think that distributed generator and its operation of electric power system state change.
If the operating status of distributed generator does not change, terminate the operation shape of this acquisition distributed generator
State information and control process.
If the operating status of distributed generator changes, relay protection exchange utilizes the running state information obtained
Calculate under the operating status, each protective relaying device BRK1, BRK2 that can dynamically change parameter online, BRK3, BRK4,
The setting valve protected on BRK5 and BRK6 is delivered separately to dynamically change the protective relaying device of parameter online.
The calculating process of setting valve is related with the topological structure operating status of electricity generation system, according to the difference of electricity generation system,
The calculating formula of the current protection setting valve of electricity generation system is：Wherein, I is the setting valve of current protection, and K is
Fault type coefficient, for three-phase shortcircuit K=1, line to line faultE is the equivalent electromotive force of electricity generation system, can be shifted to an earlier date
Adjusting can also be by formula, E=exit potentials+generated output (power generation capacity)/exit potential × ZsTo calculate, wherein hair
Capacitance/exit potential can directly use outlet electric current to replace, i.e. E=exit potentials+outlet electric current × Zs。ZsFor can be online
Dynamic change parameter protective relaying device installation place to behind system (generator to protect installation place BRK1, BRK2, BRK3,
BRK4, BRK5 and BRK6) equiva lent impedance, calculate ZsWhen, it is calculated and is obtained using fault component method, i.e., by one or two before failure
The voltage and current of cycle stores, and then subtracts each other with the voltage and current after failure as fault component and is divided by seek.
ZLFor protected circuit overall length impedance, such as the Z that positive direction is protected at BRK1LFor BRK1 to the impedance between distributed generator.K,α
Handbook that can be according to corresponding actual conditions according to known technology obtains, and then row are writeWherein,
K′rel=1.2 or 1.3 be safety factor, Zs.minFor ZsMinimum value.
The calculating formula of the phase voltage protection seting value of electricity generation system is：Wherein, U is voltage
The setting valve of protection, ZL1And ZL2For line impedance related with protection domain, Krel=1.2 or 1.3 be safety factor, ZS.maxFor
System impedance under electricity generation system minimum operational mode, system impedance when being line to line fault.
By taking the protection seting value of BRK2 as an example, relay protection exchange is electric according to the exit potential for the BRK2 being collected into and outlet
Generator is calculated to the equiva lent impedance Z for protecting installation place BRK2 based on fault component method in streams, then gone out according to formula E=
Mouth voltage+outlet electric current × ZsGenerator is obtained to the equivalent electromotive force of protection installation place BRK2, may then based on aforementioned side
The electric current and voltage protection setting valve of BRK2 is calculated in formula, is issued to the relay that can dynamically change parameter online at BRK2 and protects
Protection unit.
Three, the protective relaying device that can dynamically change parameter online receives the setting valve that the transmission of relay protection exchange comes, and changes
Become its setting valve, the setting valve for resetting protective relaying device is current setting valve.
The Generator Status information acquisition device of the present invention can be protected with the operating status of dynamic surveillance distributed generator, relay
Exchange is protected according to the operating status of distributed generator, judges whether the operating status of distributed generator changes, utilizes acquisition
Running state information calculate in the current state of operation, protected on each protective relaying device that can dynamically change parameter online
The setting valve of shield is delivered separately to dynamically change the protective relaying device of parameter online, resets protective relaying device
Setting valve.The setting valve that online dynamic changes protective relaying device in electricity generation system is realized, is solved since new energy accesses
Caused by electricity generation system the technical issues of protective relaying device failure, malfunction, the stability and safety of electricity generation system are improved
Property, the final stability for improving network system.
In the present embodiment, relay protection exchange uses standard industry control machine PLC, is realized using general PLC program language.
Claims (9)
1. a kind of protective relaying device that can dynamically change relay parameter, is being connected with distributed generator and synchronous generator
Electricity generation system in, be equipped with Generator Status information acquisition device, relay protection exchange, can dynamically change online parameter relay protect
Protection unit；The Generator Status information acquisition device is communicated with relay protection exchange using communication line 1, relay protection exchange with
The protective relaying device that parameter can dynamically be changed online is communicated using communication line 2, it is characterised in that:It is described dynamically to change online
The protective relaying device of variable element, is connected between distributed generator and busbar, female between synchronous generator and busbar
Between line and busbar, between load and busbar, using the electricity generation system and power grid system for being distributed formula generator and synchronous generator
Between system；
The running state information of the Generator Status information acquisition device acquisition distributed generator in the time interval, passes to
Relay protection exchange；
The relay protection exchange is for judging whether the operating status of distributed generator changes, the operation of distributed generator
State changes, and relay protection exchange is calculated using the running state information obtained under the operating status, respectively can be online
The setting valve protected on the protective relaying device of dynamic change parameter passes to the relay protection dress that can dynamically change parameter online
It sets；
The protective relaying device that parameter can dynamically be changed online changes according to the instruction of relay protection exchange can online dynamically
Change the protective relaying device of parameter adjusts value parameter.
2. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:Described point
Cloth generator is wind-driven generator, geother-mal power generation machine, solar generator, tidal power machine and/or by power electronics
The accumulator of equipment access has the electric power source generator of randomness.
3. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:The fortune
Row status information is the operating status of distributed generator outlet side：Power generation capacity, exit potential, exports electric current, is impedance value
No access electricity generation system, is converted to the information after digital signal.
4. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:When described
Between between be divided into：0 ＜ time intervals≤2s.
5. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:Described point
The operating status of cloth generator does not change, then adjusting on the protective relaying device of parameter can dynamically be changed online by not changing
Value.
6. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:It is described whole
Definite value is current protection setting valve and voltage protection setting valve.
7. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:It is described logical
Believe that circuit 1 and communication line 2 use WLAN or Spanning-Tree Protocol, by network communication protocol TCP/IP communication.
8. the protective relaying device according to claim 1 that can dynamically change relay parameter, it is characterised in that:It is described after
Electric protection exchange judges whether the operating status of distributed generator changes according to the running state information received, will receive
To running state information be compared with the running state information of last moment, the result of the difference of the two is transported less than last moment
The 1% of row state information value, then it is assumed that the operating status of distributed generator and its electricity generation system does not change；If the difference of the two
Result consecutive variations, aggregate-value be more than does not change the 1% of moment running state information value, then it is assumed that distributed generator and
The operating status of its electricity generation system changes.
9. the protective relaying device according to claim 6 that can dynamically change relay parameter, it is characterised in that:The electricity
Stream protection seting value calculating formula be：Wherein, K is fault type coefficient, for three-phase shortcircuit K=1, two-phase
Short circuitE is the equivalent electromotive force of electricity generation system, ZsCan dynamically to change the protective relaying device installation place of parameter online
To the equiva lent impedance of behind system, ZLFor protected circuit overall length impedance, α is protection domain；
The calculating formula of the phase voltage protection seting value of the electricity generation system is：Wherein, ZL1And ZL2
For line impedance related with protection domain, Krel=1.2 or 1.3 be safety factor, ZS.maxFor electricity generation system minimum operational mode
Under system impedance, be line to line fault when system impedance.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945912A (en) * | 2006-10-16 | 2007-04-11 | 黑龙江大学 | Method for realizing self adaptive current quick break protection of power supply circuit |
| CN103956716A (en) * | 2014-05-20 | 2014-07-30 | 上海电气集团股份有限公司 | Micro-grid dynamic self-adapting relay protection method and self-adapting protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6546342B1 (en) * | 2001-12-10 | 2003-04-08 | General Electric Company | Adaptive algorithm to prevent nuissance tripping |
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| CN1945912A (en) * | 2006-10-16 | 2007-04-11 | 黑龙江大学 | Method for realizing self adaptive current quick break protection of power supply circuit |
| CN103956716A (en) * | 2014-05-20 | 2014-07-30 | 上海电气集团股份有限公司 | Micro-grid dynamic self-adapting relay protection method and self-adapting protection device |
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