CN1674387A - Method and system for preventing electric network from collapsing - Google Patents
Method and system for preventing electric network from collapsing Download PDFInfo
- Publication number
- CN1674387A CN1674387A CN 200510063999 CN200510063999A CN1674387A CN 1674387 A CN1674387 A CN 1674387A CN 200510063999 CN200510063999 CN 200510063999 CN 200510063999 A CN200510063999 A CN 200510063999A CN 1674387 A CN1674387 A CN 1674387A
- Authority
- CN
- China
- Prior art keywords
- channel
- transmission line
- signal
- instruction
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention disclose a kind of method and system for preventing electric network from collapsing. The method and system contains underfrequency load-shedding, and uses transmission line and fault signal of machine set to excise accessory load in power-fail area, prevents stability destroyed to network splitting caused by large scale overload of transmission line and frequency collapse caused by seriously insufficient wattful power in power-fail area and too high frequency to parallel network splitting caused by seriously superfluous wattful power in power-rich area. So a kind of electric network collapsing accidents, such as New York blackout in American in 2003, total blackout in Canada in 2003 and island-wide blackout in Taiwan, can be prevented.
Description
One, technical field
The invention belongs to the operation power category, be specifically related to a kind of method and system that prevent electric network from collapsing.
Two, background technology
Electrical network includes transmission line (for sake of convenience, present specification is loosely referred to as transmission line to the ultra-high-tension power transmission line between the join domain electrical network), the load-center substation (for sake of convenience, present specification is loosely referred to as the load-center substation to the transformer station that connects transmission line and regional power grid), Generator Set and several regions electrical network, regional power grid is connected with the load-center substation, transmission line is linked to be a power delivery network to each load-center substation, and Generator Set is connected with the load-center substation or is connected to the load-center substation through regional electrical network.Like this, Generator Set is sent the regional power grid use of electric energy for its location, and dump energy is transported to other regional power grid by transmission line.Generating set disposes speed regulating device, forced exciting and demagnetize device by force, and the active power of output of regulator generator and reactive power when electric network fault are to keep and to recover power grid operation; Simultaneously, also be provided with low frequency load shedding equipment at regional power grid, when electric network fault caused that running frequency drops to a certain setting value, the less important load of cut-out kept the electric network active power-balance.
In order to improve the generating efficiency of generator, the single-machine capacity of unit is increasing.At present, single-machine capacity has reached 600,000 KW, 900,000 KW, even surpasses 1,000,000 KW.Simultaneously, because regional electric power resource, economic development and power system operating mode is different, the unit capacity of generating electricity by way of merging two or more grid systems in some area is very big, and power load less (present specification calls electric power area more than needed to this class area); Also some regional power load is much larger than the unit capacity of generating electricity by way of merging two or more grid systems, one's respective area electric power that generating set sends, can't satisfy need for electricity (present specification calls the not enough area of power supply to this class area): like this, electrical network is transported to the not enough area of power supply to the big capacity active power in electric power area more than needed through transmission line; This power supply architecture of electrical network stays very big hidden danger to safe operation.As a result, when the transmission line of a certain oepration at full load heavy-duty generator group of a certain the oepration at full load in the not enough area of power supply (or be positioned at) fault, protection electrical equipment is this transmission line (or unit) excision, and its load transfer is carried by other transmission line.Owing to be subjected to the impact of fault current, electrical network meritorious, the reactive balance state is destroyed, electrical network is in all continuous transient processes of fluctuation of a frequency and voltage: the speed regulating device of generating set, forced exciting device or by force demagnetize device perseveration adjust meritorious and idle the exerting oneself of unit; In transient process, because operator on duty's attentiveness mainly concentrates on the accident treatment, be positioned at the standby unit in the not enough area of power supply, often in time do not obtain starting power generation command, even start, owing to do not satisfy accurate same period of condition and the operation that can't be connected to the grid yet; The forced exciting device action of generating set increases idle the exerting oneself of unit to be made supply power voltage keep the stable load power in the not enough area of power supply that causes can not to reduce by means of the decline of voltage; The generating set speed regulating device that are incorporated into the power networks increase that unit is meritorious exerts oneself that to be that the regulating action of electrical network stand-by heat capacity (spinning reserve capacity) keeps steady the operation of power networks frequency dimension fixed, cause the low frequency load shedding equipment that electrical network disposes owing to do not reach the frequency and can not the less important load of cut-out of adjusting, cause the electric power in electric power area more than needed more more than needed by means of frequency descends.Simultaneously, also because not excision of the less important load of part, needing to cause adjusting the excessive and transient process that prolonged electrical network of active power.From the above as can be known; after the protected electrical equipment excision of transmission line (or heavy-duty generator group of a certain the oepration at full load) fault of a certain oepration at full load; electrical network is existing to be kept stabilizing measures or system and standby unit is generated electricity by way of merging two or more grid systems rapidly; can not make the load in the not enough area of power supply reduce power consumption yet; more can in time not start the power supply area electrical network less important load of low frequency load shedding equipment cut-out of being disposed insufficiently; make transmission line, overload operation always before power system restoration is stable to power supply not enough area transmission of electricity.In case transmission line transmit electric power is above the stability limit of circuit, protection electrical equipment just makes out of service above the circuit of stability limit by force.At this moment, the regional power grid in power supply is not enough area, owing to the active power wretched insufficiency causes frequency collapse, and electric power regional power grid more than needed is because the serious surplus of active power, also might and cause the too high unit trip that is incorporated into the power networks that makes of frequency, cause electric network from collapsing.
Three, summary of the invention
Purpose of the present invention aims to provide a kind of method and system that prevent electric network from collapsing, and these method and system can overcome electrical network because the electric network from collapsing defective that low frequency load shedding equipment can't in time excise less important load when transmission line malfunction caused.
Above-mentioned purpose can be achieved like this: a kind of method that prevents electric network from collapsing, comprise electrical network cut-out load when low frequency, its main feature is: at transmission line line fault testing device (present specification abbreviates line fault testing device as line detection apparatus) is set, at distribution line excision distribution line device (present specification abbreviates excision distribution line device as and cuts the lotus device) is set, and at line detection apparatus and cut and set up signal transmission channel between the lotus device (signal transmission channel of present specification comprises signal transmission line road and corresponding signal process, modulation, conversion, devices such as control and artificial or intelligence, abbreviate channel as), when transmission line malfunction (accident or excess load), line detection apparatus sends fault-signal or instruction to channel, after channel is handled, send line fault signal or instruction to cutting the lotus device, cut the lotus device according to signal that is received or the less important load of instruction cut-out.Cutting the lotus device can be primary signal or the instruction that line detection apparatus sends according to signal that is received or instruction, interlock trip command as the jump signal of transmission line electric current (electric weight) signal or electric current (electric weight), circuit breaker position variable signal, distribution line circuit breaker, also can channel according to control signal or instruction after primary signal or instruction process or the conversion, as through the determined circuit breaker trip instruction of the plan of excision distribution line, the order of control centre's modulation.Like this, electrical network can be as required, and when transmission line accident of transmitting electricity to the not enough area of power supply or serious excess load, the not enough area portion of excision power supply is to the distribution line of less important load power supply.
The better scheme that realizes above-mentioned purpose is that transmission line by different paths is to the not enough regional transmission of electric energy of power supply.
Another the better scheme that realizes above-mentioned purpose is that big unit failure detector (present specification abbreviates big unit failure detector as the machine set detecting device) also is set, and set up channel at machine set detecting device and described cutting between the lotus device, when big unit fault, the machine set detecting device sends fault-signal or instruction to channel, after channel is handled, send signal or instruction to cutting the lotus device, cut the sub-load of lotus device according to receiving signal or the not enough area of instruction excision power supply.Like this, electrical network can be as required, in the not enough area of power supply during big unit fault, and the sub-load in the not enough area of excision power supply, or when the big unit fault in electric power area more than needed makes this area be transformed into the not enough area of power supply, excise the sub-load of this area.
Another the better scheme that realizes above-mentioned purpose is at the part in the not enough area of power supply/whole step-down transformers transformer voltage downward modulation control device (present specification abbreviates voltage downward modulation device as) to be set, and between this voltage downward modulation device and described circuit (unit) checkout gear, set up channel, when transmission line (unit) fault, circuit (unit) checkout gear sends fault-signal or instruction to channel, after channel is handled, send signal or instruction to voltage downward modulation device, voltage downward modulation device suitably reduces the supply power voltage of transformer according to receiving signal or instruction.Like this, electrical network can suitably reduce the supply power voltage in the not enough area of power supply as required when transmission line (unit) fault, reduce the electric power of the not enough regional load of power supply.
The better scheme that realizes above-mentioned purpose is that the unit control device is set in the power plant, and between unit control device and described line detection apparatus, set up channel, line detection apparatus sends fault-signal or instruction to channel when transmission line malfunction, after channel is handled, send transmission line malfunction signal or instruction to the unit control device, the unit control device is according to the signal that receives from channel, increases that unit is meritorious exerts oneself or start standby unit.Like this, electrical network can when transmission line malfunction, increase the meritorious standby unit of exerting oneself or starting the not enough area of power supply of the not enough regional unit of power supply as required.
Another the better scheme that realizes above-mentioned purpose is in hydroenergy storage station the unit control device to be set, and between unit control device and described line detection apparatus, set up channel, line detection apparatus sends fault-signal or instruction to channel when transmission line malfunction, after channel is handled, send transmission line malfunction signal or instruction to the unit control device, the unit control device starts or switches the running status of hydroenergy storage station unit according to the signal or the instruction that receive from channel.Like this, electrical network can when transmission line malfunction, start or meritorious the exerting oneself of the not enough regional hydroenergy storage station unit of adjustment power supply as required.A kind of system of electric network from collapsing that prevents that matches with said method can be achieved like this: a kind of system that prevents electric network from collapsing, comprise transmission line, the transmission line circuit breaker, the load-center substation, distribution line, the distribution line circuit breaker, transmission line is connected to the load-center substation through the transmission line circuit breaker, distribution line is connected to the load-center substation through the distribution line circuit breaker, its main feature is: this system also is provided with channel, the transmission line checkout gear, be provided with at the part or all of distribution line of electrical network and cut the lotus device, what the line detection apparatus channel was connected to distribution line cuts the lotus device.Like this, when transmission line malfunction, line detection apparatus send transmission line malfunction signal and channel pass to be positioned at the not enough regional distribution line of power supply cut lotus device, breaking part distribution line circuit breaker, the sub-load in the not enough area of excision power supply.
The better scheme that realizes above-mentioned purpose is that this system also comprises regional power grid transformer station, distribution line is connected to regional power grid transformer station through the distribution line circuit breaker, be connected to the load-center substation again, regional power grid transformer station is provided with step-down transformer, step-down transformer is provided with voltage downward modulation device, and voltage downward modulation device is connected to line detection apparatus through described channel.Like this, line detection apparatus sends the transmission line malfunction signal when transmission line malfunction, the voltage downward modulation device in the not enough area of power supply can suitably be turned down the supply power voltage of transformer according to suffered signal, the not enough regional power load of power supply is reduced with voltage reduce.
Another the better scheme that realizes above-mentioned purpose is the generating set that this system also comprises the power plant, also is provided with the unit control device in the power plant, and the unit control device is connected to line detection apparatus through described channel.Like this, line detection apparatus sends the transmission line malfunction signal when transmission line malfunction, and the unit control device in the not enough area of power supply can or increase generator output according to the signal enabling generator that is received.
The another better scheme that realizes above-mentioned purpose is that this system also comprises pumped storage power plant, also is provided with the unit control device in pumped storage power plant, and the unit control device is connected to line detection apparatus through described channel.Like this, line detection apparatus sends the transmission line malfunction signal when transmission line malfunction, and the unit control device can or be adjusted generator output or generator is converted to generating state according to the not enough regional generator of the signal enabling power supply that is received.
The present invention has following advantage and effect:
1, the present invention adopts and at transmission line checkout gear is set, when to the transmission line malfunction of power supply not enough area transmission of electricity, excise the scheme of the less important load of part in the not enough area of power supply by the distribution line excision plan of formulating, order according to detection signal, on the one hand at a certain circuit Generator Set of the not enough area of power supply (or be positioned at) after fault is cut to power supply not enough area transmission of electricity, reduce the not enough regional power load of power supply, improve transmission line overload situation, prevent other transmission line significantly excess load cause that stability is destroyed and make grid disconnection; Dwindle the power supply electric power breach of area electrical network insufficiently on the other hand, meritorious wretched insufficiency causes frequency collapse after preventing this regional power grid and major network off-the-line, and preventing power supply insufficiently after area electrical network and the major network off-the-line, electric power regional regional power grid more than needed is meritorious serious superfluous and cause too high the making of frequency to be incorporated into the power networks unit trip and to cause electric power regional regional power grid more than needed also to be disintegrated; Simultaneously because after the less important load excision of part, the active power of need adjusting electrical network is reduced and the transient process that shortens electrical network, generating electricity by way of merging two or more grid systems of the not enough regional guest machine group of accelerating power source further improved transmission line overload situation, recovers by the power supply of the load that excises according to plan rapidly.This programme has overcome prior art because low frequency load shedding equipment timely cut-out caused defective of loading when transmission line malfunction, can effectively prevent this class accident generation of having a power failure on a large scale of U.S. New York in 2003.
2, the present invention is according to the scheme of the less important load of the not enough area portion of line detection apparatus detection signal interlock excision power supply, process automation, sequencing such as the less important load of excision complicated, that reason operator on duty judges, determines, the standby unit of startup in the electrical network transient process, quicken the accident treatment process, the accident that prevents enlarges the electric network from collapsing that is caused, and reduces operator on duty's labour intensity.
3, the present invention adopts the scheme of transmitting electricity to the not enough area of power supply by the transmission line in different paths, when the transmission line malfunction in a certain path is stopped transport, other transmission line still continues to the not enough regional transmission of electric energy of power supply, the transmission line malfunction stoppage in transit that prevents a certain path causes regional power grid and major network off-the-line initiation electric network from collapsing, avoids Taiwan in 1999, Canada in 2003 to cause the power failure of full island, national this class major break down that has a power failure that the transmission line transmission of electricity of same path is interrupted being caused because of storm.
4, the present invention adopts when transmission line malfunction, scheme by the not enough regional supply power voltage of suitable reduction power supply, the power consumption in the not enough area of power supply improves the transmission line operation conditions in the time of can reducing fault, avoids the transmission line overload operation to cause electric network from collapsing.
When 5, the present invention adopts big unit fault; the cut-out load; avoid transmission line transmit electric power above the stability limit of circuit and cause grid disconnection; can prevent especially when regional power grid and major network off-the-line independent operating; the protected electrical equipment excision of big unit fault time domain electrical network causes electric network from collapsing owing to meritorious wretched insufficiency causes frequency collapse.
6, the present invention adopts when transmission line malfunction, starts the not enough regional generator of power supply or increases the generator output scheme, improves the transmission line overload situation, thereby keeps the stabilization of power grids.
The scheme of the less important load of interlock cut-out when 7, the present invention adopts big unit fault can reduce the stand-by heat capacity (being spinning reserve capacity) of electrical network, improves the power supply capacity of electrical network.When power-supply deficiency appears in electrical network, avoid or reduce the electrical network scope of rationing the power supply.
8, the present invention is applied in advanced IT technology on the accident treatment of electrical network, can improve the accident treatment speed of electrical network greatly, further improves the power supply reliability of electrical network.
Four, description of drawings
Fig. 1 is an embodiment of the invention schematic diagram.
Five, embodiment
Preferred forms 1
Shown in Figure 1 is the schematic diagram of the embodiment of the invention: this system comprises load-center substation 1, regional power grid 1-1,1-2 and 1-3, transmission line 2-1 and 2-2, generating set 5-1 is connected to regional power grid 1-1 through circuit breaker 5-11, and regional power grid 1-1 is connected to load-center substation 1; Generating set 5-2 and 5-3 are connected to regional power grid 1-2 and 1-3 respectively, and regional power grid 1-2 and 1-3 are connected to load-center substation 1 by transmission line 2-1,2-2 through circuit breaker 2-11,2-21 respectively; Transformer station at regional power grid 1-1 is provided with on-load tap-changing transformer 3, and distribution line 4-1,4-2 and 4-3 are connected to transformer 3 through circuit breaker 4-11,4-21 and 4-31; At transmission line 2-1,2-2 remote signalling telemetering equipment 2-111,2-211 are set respectively, remote signalling telemetering equipment 2-111,2-211 are line detection apparatus of the present invention; At distribution line 4-1,4-2 remote control 4-111,4-211 are set respectively, remote control 4-111,4-211 are the lotus devices of cutting of the present invention; At distribution line 4-3 low frequency load shedding equipment 4-311 is set; At on-load tap-changing transformer 3 remote control 3-1 is set, remote control 3-1 is a voltage downward modulation device of the present invention; At generating set 5-1 remote signalling remote measuring and controlling device 5-111 is set, remote signalling remote measuring and controlling device 5-111 is a unit control device of the present invention, each remote signalling remote measuring and controlling device is interconnected through carrier line 6 and control desk 61, control desk 61 adopts " signal shows; artificial affirmation " control model, be provided with " transmission line 2-2 has a power failure; excision distribution line 4-1 " at control desk 61, " transmission line 2-1 excess load; excision distribution line 4-2 ", " transmission line 2-2 accident; start standby unit 5-1 ", " transmission line 2-2 accident; reduce transformer 3 voltages " alarm window and corresponding acknowledgment button, carrier line 6 and control desk 61 are channels of the present invention: regional power grid 1-1 is a power supply of the present invention area electrical network insufficiently, and regional power grid 1-2 and 1-3 are electric power of the present invention regional regional power grids more than needed.During use, control desk 61 is installed in the control room of regional power grid 1-1; Like this, the huge current flow that generating set 5-2, the 5-3 of regional power grid 1-2,1-3 are sent is transported to load-center substation 1 by transmission line 2-1,2-2 through circuit breaker respectively, after step-down substation transformer 3 step-downs of regional electrical network 1-1, power the direct input area electrical network of generating set electric energy that 5-1 sends 1-1 to load again by distribution line 4-1,4-2,4-3.When transmission line 2-2 fault, remote signalling remote measuring and controlling device 2-211 is delivered to the trip signal of fault current signal or circuit breaker 2-21 the control desk 61 in control room by carrier line 6, " the transmission line 2-2 accident; excision distribution line 4-1 " of control desk 61, " transmission line 2-2 accident; start standby unit 5-1 ", " transmission line 2-2 accident; reduce transformer 3 voltages " alarm window is bright, the operator on duty according to circumstances, press wherein one or multinomial affirmation button, as after pressing " transmission line 2-2 accident; excision distribution line 4-1 " ACK button, this conversion of signals is the trip command of distribution line 4-1 circuit breaker 4-11, start remote control 4-111 cut-off breaker 4-11, excision distribution line 4-1 institute connected load.The process of the excision load process of transmission line 2-1 fault, generating set 5-1 fault during with transmission line 2-2 accident is identical.
Preferred forms 2
Control desk 61 embodiment illustrated in fig. 1 has " signal shows, manually confirms " and " signal demonstration, excision automatically " two kinds of control models, when being set in " signal shows, excises automatically " control model, if transmission line or unit 5-1 accident, control desk 61 shows " transmission line (unit) accident " signal, and finishes following operation automatically: start remote control 4-111,4-211 excision distribution line 4-1,4-2; Start remote control 3-1, the tap of on-load tap-changing transformer 3 is transferred to maximum position, reduce the working voltage of distribution line 4-1,4-2,4-3; Start remote signalling remote measuring and controlling device 5-111, starter-generator group 5-1 generating or meritorious the exerting oneself of transferring additional issue group of motors 5-1.When control desk 61 was set in " signal shows, manually confirms " control model, the process of cut-out load had preferred forms 1 identical during accident.
Certainly, the foregoing description control desk 61 can be a dispatching desk, and checkout gear can be a protective relaying device also, and cutting the lotus device also can be protective relaying device or circuit breaker control device (control loop).
Certainly, the foregoing description channel can be a wireless channel, also can be wire message way.
Certainly, the foregoing description channel also can be independent transmission line, also can be the carrier line that control desk 61 is not set, and channel also can be without the control room, also can a part through the control room.
Certainly, the foregoing description can part of functions be changed, modulate through control desk, also can change, modulate through control desk by repertoire, also can change, modulate without control desk by repertoire.
Certainly, the plans such as amplitude that qualitative and quantitative, the electrical network scope that reduces voltage of the particular location of the foregoing description excision distribution line and quantity, the standby unit of startup and voltage reduce, can preestablish by the related personnel in proper order, also can microcomputer be set and generate automatically by microcomputer at channel.
Certainly, the not enough area of the power supply of the foregoing description, electric power area more than needed are dynamic, change with power system operating mode, the not enough area of power supply may become electric power area more than needed, electric power area more than needed also may become the not enough area of power supply, as when certain large-scale unit forced shutdown, just can make a certain electric power area more than needed be transformed into the not enough area of power supply.
Certainly, the foregoing description also can at regional power grid 1-2 and the machine set detecting device is set 1-3 or/and distribution line is cut the lotus device.Certainly, regional power grid also can have many circuits to be connected with the load-center substation, cuts the lotus device and also can be arranged on the distribution line of directly drawing from the load-center substation.
Certainly, the generator of the foregoing description can be to be connected with electrical network through step-up transformer.
Claims (10)
1, a kind of method that prevents electric network from collapsing, comprise electrical network cut-out load when low frequency, be primarily characterized in that: line detection apparatus is set at transmission line, cut the lotus device in the distribution line setting, and at line detection apparatus and cut between the lotus device and set up channel, when transmission line malfunction, line detection apparatus sends fault-signal or instruction to channel, after channel is handled, send line fault signal or instruction to cutting the lotus device, cut the lotus device according to signal that is received or instruction cut-out load.
2, claims 1 described a kind of method that prevents electric network from collapsing is characterized in that: the transmission line by different paths is to the not enough regional transmission of electric energy of power supply.
3, claims 1 or 2 described a kind of methods that prevent electric network from collapsing, it is characterized in that: this method also is provided with the machine set detecting device at generator, and set up channel at machine set detecting device and described cutting between the lotus device, when the unit fault, the machine set detecting device sends fault-signal or instruction to channel, channel sends fault-signal or instruction to cutting the lotus device after handling, and cuts the lotus device according to receiving signal or instruction cut-out load.
4, claims 1 or 3 described a kind of methods that prevent electric network from collapsing, it is characterized in that: voltage downward modulation device is set at part/whole step-down substations, and between this voltage downward modulation device and described circuit (unit) checkout gear, set up channel, when the transmission line malfunction thing, circuit (unit) checkout gear sends fault-signal or instruction to channel, after channel is handled, send signal or instruction to voltage downward modulation device, voltage downward modulation device suitably reduces the supply power voltage of transformer according to receiving signal or instruction.
5, claims 1 or 2 described a kind of methods that prevent electric network from collapsing, it is characterized in that: the unit control device is set in the power plant, and between unit control device and described line detection apparatus, set up channel, line detection apparatus sends fault-signal or instruction to channel when transmission line malfunction, after channel is handled, send transmission line malfunction signal or instruction to the unit control device, the unit control device is according to the signal that receives from channel, adjusts that unit is meritorious exerts oneself or start standby unit.
6, claims 1 or 2 described a kind of methods that prevent electric network from collapsing, it is characterized in that: the unit control device is set in hydroenergy storage station, and between unit control device and described line detection apparatus, set up channel, line detection apparatus sends fault-signal or instruction to channel when transmission line malfunction, after channel is handled, send transmission line malfunction signal or instruction to the unit control device, the unit control device starts or switches the running status of hydroenergy storage station unit according to the signal or the instruction that receive from channel.
7, a kind of system that prevents electric network from collapsing, comprise transmission line, transmission line circuit breaker, load-center substation, distribution line, distribution line circuit breaker, transmission line is connected with the load-center substation through the transmission line circuit breaker, distribution line is connected to the load-center substation through the distribution line circuit breaker, be primarily characterized in that: this system also is provided with channel, transmission line checkout gear, be provided with at the part or all of distribution line of electrical network and cut the lotus device, what the line detection apparatus channel was connected to distribution line cuts the lotus device.
8, claims 7 described a kind of systems that prevent electric network from collapsing, it is characterized in that: this system also comprises regional power grid transformer station, distribution line is connected to regional power grid transformer station through the distribution line circuit breaker, be connected to the load-center substation again, regional power grid transformer station is provided with step-down transformer, step-down transformer is provided with voltage downward modulation device, and voltage downward modulation device is connected to line detection apparatus through described channel.
9, claims 7 or 8 described a kind of systems that prevent electric network from collapsing, it is characterized in that: this system also comprises the generating set in the not enough regional power plant of power supply, also be provided with the unit control device in the power plant, the unit control device is connected to line detection apparatus through described channel.
10, claims 7 or 8 described a kind of systems that prevent electric network from collapsing, it is characterized in that: also comprise pumped storage power plant, also be provided with the unit control device in pumped storage power plant, the unit control device is connected to line detection apparatus through described channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100639995A CN100452605C (en) | 2004-03-28 | 2005-03-25 | Method and system for preventing electric network from collapsing |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410026671.1 | 2004-03-28 | ||
| CN200410026671 | 2004-03-28 | ||
| CNB2005100639995A CN100452605C (en) | 2004-03-28 | 2005-03-25 | Method and system for preventing electric network from collapsing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1674387A true CN1674387A (en) | 2005-09-28 |
| CN100452605C CN100452605C (en) | 2009-01-14 |
Family
ID=35046725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100639995A Expired - Fee Related CN100452605C (en) | 2004-03-28 | 2005-03-25 | Method and system for preventing electric network from collapsing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100452605C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459337B (en) * | 2008-12-30 | 2011-12-21 | 上海慧伦电气有限公司 | Stabilized control system capable of accurately cut load selection according to load path |
| CN102957147A (en) * | 2012-11-30 | 2013-03-06 | 辽宁省电力有限公司电力科学研究院 | Multi-load characteristic-matched under-frequency load shedding optimal control system and multi-load characteristic-matched under-frequency load shedding optimal control method |
| CN112564032A (en) * | 2020-11-27 | 2021-03-26 | 国网四川省电力公司德阳供电公司 | Adjusting method for setting line of low-frequency load shedding protection device of city power grid |
| CN113394775A (en) * | 2020-12-03 | 2021-09-14 | 广东电网有限责任公司广州供电局 | Virtual power plant electric energy regulation and control equipment and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120556C (en) * | 1995-02-25 | 2003-09-03 | 国电自动化研究院 | In-line monitoring and prevention control system with stable transient for power system |
| CN1426149A (en) * | 2001-12-17 | 2003-06-25 | 秦明亮 | Automatic low frequency (low voltage) load reducing control new mode and its synchronizing calculation method |
| CN2597997Y (en) * | 2002-12-04 | 2004-01-07 | 西安三和新技术实业有限公司 | Flashover telemetering system for isolator for high-voltage transmission line |
-
2005
- 2005-03-25 CN CNB2005100639995A patent/CN100452605C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459337B (en) * | 2008-12-30 | 2011-12-21 | 上海慧伦电气有限公司 | Stabilized control system capable of accurately cut load selection according to load path |
| CN102957147A (en) * | 2012-11-30 | 2013-03-06 | 辽宁省电力有限公司电力科学研究院 | Multi-load characteristic-matched under-frequency load shedding optimal control system and multi-load characteristic-matched under-frequency load shedding optimal control method |
| CN112564032A (en) * | 2020-11-27 | 2021-03-26 | 国网四川省电力公司德阳供电公司 | Adjusting method for setting line of low-frequency load shedding protection device of city power grid |
| CN112564032B (en) * | 2020-11-27 | 2023-03-28 | 国网四川省电力公司德阳供电公司 | Adjusting method for setting line of low-frequency load shedding protection device of city power grid |
| CN113394775A (en) * | 2020-12-03 | 2021-09-14 | 广东电网有限责任公司广州供电局 | Virtual power plant electric energy regulation and control equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100452605C (en) | 2009-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106655478B (en) | Low-voltage emergency safety power supply system of household garbage power plant and control method thereof | |
| AU2010285341B2 (en) | Power regulating system for solar power station | |
| CN102496966B (en) | Wind power station grid-connected operation power optimization control substation | |
| CN107681672A (en) | The interactive approach of charging pile interactive terminal and charging pile access power network | |
| CN102324741B (en) | Micro-power grid off-grid energy balance and control device and method | |
| CN103457296B (en) | A kind of independent operating micro-grid master control power-supply switching method | |
| CN100452605C (en) | Method and system for preventing electric network from collapsing | |
| CN202749834U (en) | Low-voltage ride through device of photovoltaic grid-connected inverter | |
| KR101314123B1 (en) | Switchgear for controling peak using distributed generation of grid connected | |
| CN114069701B (en) | Multi-time-scale power control system suitable for new energy station | |
| CN112046328B (en) | Electric bicycle battery centralized charging and replacing system with energy bidirectional flow function | |
| CN110445158B (en) | Energy storage power station system based on multi-network integration and transient control method | |
| CN201134697Y (en) | Uninterrupted power supplying standby electric generating plant | |
| CN114256876A (en) | Distributed photovoltaic inverter control strategy applied to low-voltage transformer area | |
| CN210273512U (en) | Micro-grid control system | |
| CN202550689U (en) | Intelligent management control system for enhancing stability of small power grid | |
| CN210111686U (en) | Standby power supply device and system | |
| KR20140113185A (en) | Ups using lithium-ion polymer battery | |
| CN113612259A (en) | Comprehensive energy station coordination control secondary system and method | |
| CN112448415A (en) | Safety protection equipment based on distributed photovoltaic grid connection | |
| CN217216091U (en) | Power supply device for control power supply of low-voltage frequency converter | |
| CN214205067U (en) | Multi-power-supply railway communication base station | |
| CN116599143B (en) | Offshore power grid operation control system with wind power integrated | |
| CN114069858B (en) | Optimal scheduling method for power system | |
| CN116826795B (en) | Energy storage power station non-planned island operation load distribution control equipment and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Longhu Electric Power Technology Science Co., Ltd., Shantou Special Economic Region Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Longhu Electric Power Technology Science Co., Ltd., Shantou Special Economic Region Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20130325 |