CN110336315A - A kind of receiving end city partial electric grid isolated power grid control system - Google Patents
A kind of receiving end city partial electric grid isolated power grid control system Download PDFInfo
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- CN110336315A CN110336315A CN201910488945.5A CN201910488945A CN110336315A CN 110336315 A CN110336315 A CN 110336315A CN 201910488945 A CN201910488945 A CN 201910488945A CN 110336315 A CN110336315 A CN 110336315A
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- 230000006855 networking Effects 0.000 claims abstract description 117
- 238000012544 monitoring process Methods 0.000 claims abstract description 48
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The present invention provides a kind of receiving end city partial electric grid isolated power grid control system, wherein: the voltage signal and current signal of networking lines monitoring arrangement acquisition receiving end city partial electric grid, and judge that networking whether occurs between the operating status and receiving end city partial electric grid and major network of receiving end city partial electric grid turns isolated network failure, when receiving end city partial electric grid is in isolated power grid state, then isolated power grid status signal is sent to isolated power grid generator regulating device and isolated power grid cutting load device；Isolated power grid cutting load device starts with the frequency and voltage of receiving end city partial electric grid, the load of selection excision receiving end city partial electric grid according to isolated power grid status signal.System provided by the invention can be continuously adjusted finely after receiving end city partial electric grid forms isolated network, and control cost is small, and there is no spend the problem of controlling or owing control.
Description
Technical field
The present invention relates to technical field of electric power more particularly to a kind of receiving end city partial electric grid isolated power grid control systems.
Background technique
With the rapid development of our country's economy, electric load is also constantly increasing, and the voltage class of electric system is also more next
It is higher, when power grid main grid structure voltage class raising after, the partial electric grid of lower voltage grade be possible to due to natural calamity,
The incidents such as terrorist activity, power equipment aging, collapse of voltage, cascading failure cause isolated network independent operating even large area and stop
The risk of electricity.Several bulk power grid power outages occurred in world wide in recent years, increase people and reliably transport to power grid security
Capable attention degree.The generation of large area blackout often will cause huge economic loss, and the consequence of initiation is also increasingly
Seriously.
For the safe and stable operation for keeping bulk power grid, the country is controlled using safety stabilization control system, it is ensured that is occurred
The safe and stable operation of bulk power grid in the case of catastrophe failure, for receiving end city partial electric grid isolated power grid security and stability control
System is controlled, not can be carried out it is fine continuously adjust, control cost is bigger than normal, and there is control or the deficient possibility controlled.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of receiving end city partial electric grid isolated power grid control system,
It after receiving end city partial electric grid forms isolated network, can finely be continuously adjusted, control cost is small, and controls or owe there is no crossing
The problem of control.
A kind of receiving end city partial electric grid isolated power grid control system provided by the invention comprising: networking lines monitoring
Device, isolated network fault generator fast adjuster, isolated network failure fast cut back device, isolated power grid generator adjust dress
It sets, isolated power grid cutting load device；
The networking lines monitoring arrangement, for acquiring the voltage signal and current signal of receiving end city partial electric grid, and
The operation shape of receiving end city partial electric grid is judged according to the voltage signal of receiving end city partial electric grid and current signal
Networking whether occurs between state and receiving end city partial electric grid and major network and turns isolated network failure, when the receiving end city part
When generation networking turns isolated network failure between power grid and major network, then sends control command to the isolated network fault generator and quickly adjust
Device and the isolated network failure fast cut back device, when receiving end city partial electric grid is in isolated power grid state, then
The isolated power grid status signal of receiving end city partial electric grid is sent to the isolated power grid generator regulating device and described
Isolated power grid cutting load device；
The isolated network fault generator fast adjuster, for adjusting receiving end city part electricity according to the control command
The output power of generator in net；
The isolated network failure fast cut back device, for cutting off receiving end city part electricity according to the control command
The load of net；
The isolated power grid generator regulating device, for utilizing the receiving end according to the isolated power grid status signal
The frequency and voltage of city partial electric grid adjust the output power of the generator in the partial electric grid of the receiving end city；
The isolated power grid cutting load device, for utilizing the receiving end city according to the isolated power grid status signal
The frequency and voltage of partial electric grid, the load of selection excision receiving end city partial electric grid.
Preferably, the operation control system includes multiple networking lines monitoring arrangements, one of networking lines prison
View apparatus is main networking lines monitoring arrangement；
Each networking lines monitoring arrangement is used to the substation of receiving end city partial electric grid or hair where obtaining it
Three-phase voltage, three-phase current and the switch position signal of networking line between power plant and major network；
Other networking lines in the multiple networking lines monitoring arrangement in addition to the main networking lines monitoring arrangement
Monitoring arrangement, three-phase voltage, three-phase current and the switch position signal for being also used to be corresponded to networking line are sent to the master
Networking lines monitoring arrangement；
The main networking lines monitoring arrangement, for three-phase voltage, three-phase current and the position of the switch according to networking line
Signal calculates the power of the networking line, and big between the three-phase current and setting electric current threshold value of the networking line
Size between the power and setting power threshold value of the small and described networking line, judges also according to the switch position signal
Whether the switch between the substation or the power plant and major network is in gate-dividing state, when the three-phase electricity of the networking line
Stream be less than the setting electric current threshold value, and it is described networking line power be less than the setting power threshold value when and it is described
When the switch of networking line is in gate-dividing state between substation or the power plant and major network, then judge that the networking line is thrown
Fortune, on the contrary judge that the networking line is stopped transport, when at least one networking between the substation or the power plant and major network
Line puts into operation, then judges that receiving end city partial electric grid and Major Networks are run, when the substation or the power plant with
When networking line between major network is stopped transport, then judge that receiving end city partial electric grid is in isolated power grid state, when the change
The networking line that the last item puts into operation between power station or the power plant and major network trips, then judges the receiving end city office
Portion's power grid occurs networking and turns isolated network failure.
Preferably, the main networking lines monitoring arrangement, further for occurring when receiving end city partial electric grid
When networking turns isolated network failure, control command is first sent to the isolated network fault generator fast adjuster, to control the orphan
Net fault generator fast adjuster adjusts the output power of generator in the partial electric grid of the receiving end city, if the generator
Output power it is corresponding need regulated quantity beyond the adjustable range of the generator, then for model is adjusted beyond the generator
The part enclosed, the main networking lines monitoring arrangement also send control command to the isolated network failure fast cut back device, control
Make the load of the isolated network failure fast cut back device excision receiving end city partial electric grid.
Preferably, the main networking lines monitoring arrangement, further for the change in receiving end city partial electric grid
The switch on networking line between power station or power plant and major network all because of fault trip after, according to receiving end city innings before failure
Portion's power grid is generated control command by the size into power from major network, and the control command is sent to the isolated network fault generator
Fast adjuster and the isolated network failure fast cut back device；
The isolated network fault generator fast adjuster, for according to receiving end before failure corresponding in the control command
City partial electric grid, by the size into power, adjusts the output power of generator in the partial electric grid of receiving end city from major network；
The isolated network failure fast cut back device, for according to receiving end city before failure corresponding in the control command
Partial electric grid is from major network by the size into power, the load of selection excision receiving end city partial electric grid.
Preferably, the main networking lines monitoring arrangement is also used to work as and judges that receiving end city partial electric grid is in
When running isolated network state, isolated power grid status signal is sent to the isolated power grid generator regulating device and the isolated network is transported
Row cutting load device.
The invention has the following beneficial effects: control system provided by the invention, when receiving end city partial electric grid is sent out
When raw networking turns isolated network failure, isolated network fault generator fast adjuster adjusts receiving end city partial electric grid according to control command
The output power of middle generator, isolated network failure fast cut back device cut off the negative of receiving end city partial electric grid according to control command
Lotus, when receiving end city partial electric grid is in isolated power grid state, isolated power grid generator regulating device is according to isolated power grid shape
State signal adjusts the output of the generator in the partial electric grid of receiving end city using the frequency and voltage of receiving end city partial electric grid
Power, isolated power grid cutting load device is according to isolated power grid status signal, using the frequency and voltage of receiving end city partial electric grid,
The load of selection excision receiving end city partial electric grid can use receiving end city after receiving end city partial electric grid forms isolated network
The frequency and voltage of power grid are finely continuously adjusted, and control cost is small, and there is no spend the problem of controlling or owing control.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is partial electric grid isolated power grid control system functional block diagram in receiving end city provided by the invention.
Fig. 2 is partial electric grid isolated power grid control system control flow chart in receiving end city provided by the invention.
Specific embodiment
The present invention provides a kind of receiving end city partial electric grid isolated power grid control system, as shown in Figure 1, comprising: networking
Line monitoring device, isolated network fault generator fast adjuster, isolated network failure fast cut back device, isolated power grid generator
Regulating device, isolated power grid cutting load device.
Networking lines monitoring arrangement, for acquiring the voltage signal and current signal of receiving end city partial electric grid, and according to
The voltage signal and current signal of receiving end city partial electric grid judge operating status and the receiving end city of receiving end city partial electric grid
Networking whether occurs between city's partial electric grid and major network and turns isolated network failure, joins when between receiving end city partial electric grid and major network
When net turns isolated network failure, then control command is sent to isolated network fault generator fast adjuster and isolated network failure fast cut back
Device then sends the isolated power grid shape of receiving end city partial electric grid when receiving end city partial electric grid is in isolated power grid state
State signal is to isolated power grid generator regulating device and isolated power grid cutting load device.
Isolated network fault generator fast adjuster is used to be adjusted in the partial electric grid of receiving end city according to control command and generate electricity
The output power of machine.
Isolated network failure fast cut back device is used to cut off the load of receiving end city partial electric grid according to control command.
Isolated power grid generator regulating device is used to be adjusted in the partial electric grid of receiving end city according to isolated power grid status signal
Generator output power, here isolated power grid generator regulating device after receiving isolated power grid status signal, from
It is dynamic to be adjusted and control according to the frequency and voltage of receiving end city partial electric grid.
Isolated power grid cutting load device is used for according to isolated power grid status signal, selection excision receiving end city partial electric grid
Load, isolated power grid cutting load device is after receiving isolated power grid status signal here, automatically according to receiving end city part
The load of frequency and voltage the selection excision receiving end city partial electric grid of power grid.
Specifically, three-phase voltage, the three-phase current signal of isolated network fault generator fast adjuster acquisition generator, root
According to the three-phase voltage of acquisition, three-phase current signal, calculate the frequency of generator, realtime power, generator variable capacity, occur
Networking turns order and execution that networking lines monitoring arrangement is received when isolated network failure.
Isolated network failure fast cut back device acquisition our station (substation or power plant) bus three-phase voltage, each load go out
Line three-phase current, calculate our station frequency, can cutting load capacity, occur to receive networking lines monitoring arrangement when networking turns isolated network failure
Control command and execution.
Isolated power grid generator regulating device acquires three-phase voltage, the three-phase current signal of generator, calculates generator
Frequency, realtime power, generator variable capacity, the isolated power grid state of networking lines monitoring arrangement is received when isolated power grid,
The isolated power grid regulatory function of this open power plant after receiving the isolated power grid status signal, according to the real-time frequency of this power plant,
Voltage is adjusted.
Isolated power grid cutting load device acquires our station (substation or power plant) bus three-phase voltage, each load outlet three
Phase current, calculate our station frequency, can cutting load capacity, the isolated power grid shape of networking lines monitoring arrangement is received when isolated power grid
State, the isolated power grid cutting load function of open our station after receiving the isolated power grid state, and according to the real-time frequency of our station, electricity
Pressure carries out cutting load control.
Further, operation control system includes multiple networking lines monitoring arrangements, one of networking lines monitoring
Device is main networking lines monitoring arrangement.In each substation or power plant, it is required to one networking lines monitoring dress of installation
It sets, is communicated by main networking lines monitoring arrangement with other devices in operation control system.
Each networking lines monitoring arrangement is used to the substation of receiving end city partial electric grid or hair where obtaining it
Three-phase voltage, three-phase current and the switch position signal of networking line between power plant and major network.
Other networking lines monitoring arrangements in multiple networking lines monitoring arrangements in addition to main networking lines monitoring arrangement,
Three-phase voltage, three-phase current and the switch position signal for being also used to be corresponded to networking line are sent to main networking lines monitoring dress
It sets.
Main networking lines monitoring arrangement is based on the three-phase voltage, three-phase current and switch position signal according to networking line
The power of networking line is calculated, and compares the size between the three-phase current and setting electric current threshold value of networking line, and networking line
Size between power and setting power threshold value, also according to switch position signal judge substation or power plant and major network it
Between switch whether be in gate-dividing state, when networking line three-phase current be less than setting electric current threshold value, and network line power
The switch of networking line is in gate-dividing state when less than setting power threshold value and between substation or power plant and major network
When, then judge that networking line puts into operation, otherwise judgement networking line is stopped transport, when at least one between substation or power plant and major network
Networking line puts into operation, then judges that receiving end city partial electric grid and Major Networks are run, when between substation or power plant and major network
Networking line when stopping transport, then judge that receiving end city partial electric grid is in isolated power grid state, when substation or power plant with
The networking line that the last item puts into operation between major network trips, then judges that receiving end city partial electric grid occurs networking and turns isolated network event
Barrier.
Main networking lines monitoring arrangement is further used for when partial electric grid generation networking in receiving end city turns isolated network failure,
Control command is first sent to isolated network fault generator fast adjuster, to control isolated network fault generator fast adjuster tune
The output power for saving generator in the partial electric grid of receiving end city, needs regulated quantity to exceed if the output power of the generator is corresponding
The adjustable range of the generator, then for the part beyond the generator adjustable extent, main networking lines monitoring arrangement is also
Control command is sent to isolated network failure fast cut back device, controls isolated network failure fast cut back device excision receiving end city office
The load of portion's power grid needs regulated quantity to supplement the residue of the part beyond the generator adjustable extent.
Main networking lines monitoring arrangement be further used for the substation of receiving end city partial electric grid or power plant with
Between major network networking line on switch all because of fault trip after, according to receiving end city partial electric grid before failure from major network by into
The size of power generates control command, and the control command is sent to isolated network fault generator fast adjuster and isolated network event
Hinder fast cut back device.
Isolated network fault generator fast adjuster is used for according to receiving end city part before failure corresponding in control command
Power grid, by the size into power, adjusts the output power of generator in the partial electric grid of receiving end city from major network.
Isolated network failure fast cut back device is used for according to receiving end city partial electric grid before failure corresponding in control command
From major network by the size into power, the load of selection excision receiving end city partial electric grid.
Further, main networking lines monitoring arrangement, which is also used to work as, judges that receiving end city partial electric grid is in operation isolated network
When state, isolated power grid status signal is sent to isolated power grid generator regulating device and isolated power grid cutting load device.
Fig. 2 is partial electric grid isolated power grid control system control flow chart in receiving end city provided by the invention, control process
It is as follows:
1. being in networking operation shape as the receiving end city partial electric grid where networking lines monitoring arrangement judges control system
State or isolated power grid state, when being in networking operation state, networking lines monitoring arrangement does not send out control command any and lonely
Running State signal gives other devices, this control system is without any control measure.
2. when the last item networking line tripping between receiving end city partial electric grid and major network being judged to that networking turn orphan occurs
Net failure is taken control measure by the size into power from major network according to receiving end city partial electric grid before failure at this time, and should
By into power as needing regulated quantity, when needing regulated quantity to be less than or equal to before failure all generators in the partial electric grid of receiving end city
When the sum of adjustable amount (being defined as generator adjustable extent), networking lines monitoring arrangement only sends out control command and gives isolated network failure
Generator fast adjuster needs to adjust otherwise by according to the power output of generator adjustable extent regulator generator by remaining
Amount issues isolated network failure fast cut back device and carries out cutting load control.
3. being given when receiving end city partial electric grid isolated power grid by networking lines monitoring arrangement hair isolated power grid status signal
Isolated power grid generator regulating device and isolated power grid cutting load device, are controlled according to real-time status by the latter, work as isolated network
Without taking any control measure when voltage and frequency are in normal allowable fluctuation range, when isolated network voltage and frequency are more than normal
Allowable fluctuation range, but when being less than allowable fluctuation range 2 (fluctuation is not very serious) by isolated power grid generator regulating device into
Row is adjusted, isolated power grid cutting load device cutout unit after delay when isolated network voltage is more than allowable fluctuation range 2 with frequency
Divide load, the receiving end city partial electric grid of isolated power grid is allowed to restore normal.
Control system provided by the invention is when generation networking turns isolated network failure, according to receiving end city partial electric grid before failure
Control measure, the unbalanced power amount of energy Fast-Balance part isolated network, for local isolated network are taken from major network by the size into power
Continuous power supply offer condition, while preferential regulator generator power output when control is adjusted, reduce control cost.Receiving end city
Fine company is preferentially carried out according to isolated network frequency and voltage by isolated power grid generator regulating device when partial electric grid isolated power grid
Continuous tracking is adjusted, and was reduced control or was owed the probability of control.The system can reduce receiving end city partial electric grid under extreme case and have a power failure
Probability, improve power supply reliability.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (5)
1. a kind of receiving end city partial electric grid isolated power grid control system characterized by comprising networking lines monitoring arrangement,
Isolated network fault generator fast adjuster, isolated network failure fast cut back device, isolated power grid generator regulating device, isolated network
Run cutting load device；
The networking lines monitoring arrangement, for acquiring the voltage signal and current signal of receiving end city partial electric grid, and according to
The voltage signal and current signal of receiving end city partial electric grid judge the operating status of receiving end city partial electric grid with
And networking whether occurs between receiving end city partial electric grid and major network and turns isolated network failure, when receiving end city partial electric grid
When generation networking turns isolated network failure between major network, then control command is sent to the isolated network fault generator fast adjuster
It is then sent with the isolated network failure fast cut back device when receiving end city partial electric grid is in isolated power grid state
The isolated power grid status signal of receiving end city partial electric grid is to the isolated power grid generator regulating device and the isolated network
Run cutting load device；
The isolated network fault generator fast adjuster, for being adjusted in the partial electric grid of receiving end city according to the control command
The output power of generator；
The isolated network failure fast cut back device, for cutting off receiving end city partial electric grid according to the control command
Load；
The isolated power grid generator regulating device, for utilizing the receiving end city according to the isolated power grid status signal
The frequency and voltage of partial electric grid adjust the output power of the generator in the partial electric grid of the receiving end city；
The isolated power grid cutting load device, for utilizing the receiving end city part according to the isolated power grid status signal
The frequency and voltage of power grid, the load of selection excision receiving end city partial electric grid.
2. partial electric grid isolated power grid control system in receiving end city according to claim 1, which is characterized in that the operation
Control system includes multiple networking lines monitoring arrangements, and one of networking lines monitoring arrangement is main networking lines monitoring dress
It sets；
Each networking lines monitoring arrangement is used to the substation of receiving end city partial electric grid or power plant where obtaining it
Three-phase voltage, three-phase current and the switch position signal of networking line between major network；
Other networking lines monitoring in the multiple networking lines monitoring arrangement in addition to the main networking lines monitoring arrangement
Device, three-phase voltage, three-phase current and the switch position signal for being also used to be corresponded to networking line are sent to the main networking
Line monitoring device；
The main networking lines monitoring arrangement, for three-phase voltage, three-phase current and the switch position signal according to networking line
The power of the networking line, and the size between the three-phase current and setting electric current threshold value of the networking line are calculated, with
And the size between the power and setting power threshold value of the networking line, the change is judged also according to the switch position signal
Whether the switch between power station or the power plant and major network is in gate-dividing state, when the three-phase current of the networking line is less than
The setting electric current threshold value, and it is described networking line power be less than the setting power threshold value when and the substation
Or the switch for line of networking between the power plant and major network then judges that the networking line puts into operation when being in gate-dividing state, it is on the contrary
Judge that the networking line is stopped transport, when at least one networking line puts into operation between the substation or the power plant and major network,
Then judge that receiving end city partial electric grid and Major Networks are run, when between the substation or the power plant and major network
Networking line when stopping transport, then judge that receiving end city partial electric grid is in isolated power grid state, when the substation or
The networking line that the last item puts into operation between the power plant and major network trips, then judges that receiving end city partial electric grid is sent out
Raw networking turns isolated network failure.
3. partial electric grid isolated power grid control system in receiving end city according to claim 2, which is characterized in that described main
Net line monitoring device, further for first sending when partial electric grid generation networking in the receiving end city turns isolated network failure
Control command is to the isolated network fault generator fast adjuster, to control the isolated network fault generator fast adjuster
The output power of generator in the partial electric grid of the receiving end city is adjusted, needs to adjust if the output power of the generator is corresponding
Amount exceeds the adjustable range of the generator, then for the part beyond the generator adjustable extent, the main networking lines
Monitoring arrangement also sends control command to the isolated network failure fast cut back device, controls the isolated network failure fast cut back
The load of device excision receiving end city partial electric grid.
4. partial electric grid isolated power grid control system in receiving end city according to claim 2, which is characterized in that described main
Net line monitoring device, further between the substation or power plant and major network of receiving end city partial electric grid
Networking line on switch all because of fault trip after, according to receiving end city partial electric grid before failure from major network by into the big of power
Small generation control command, and the control command is sent to the isolated network fault generator fast adjuster and isolated network event
Hinder fast cut back device；
The isolated network fault generator fast adjuster, for according to receiving end city before failure corresponding in the control command
Partial electric grid, by the size into power, adjusts the output power of generator in the partial electric grid of receiving end city from major network；
The isolated network failure fast cut back device, for according to receiving end city part before failure corresponding in the control command
Power grid is from major network by the size into power, the load of selection excision receiving end city partial electric grid.
5. partial electric grid isolated power grid control system in receiving end city according to claim 2, which is characterized in that described main
Net line monitoring device is also used to transport isolated network when judging that receiving end city partial electric grid is in operation isolated network state
Row status signal is sent to the isolated power grid generator regulating device and the isolated power grid cutting load device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910488945.5A CN110336315B (en) | 2019-06-04 | 2019-06-04 | Isolated network operation control system for local power grid of receiving-end city |
Applications Claiming Priority (1)
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