CN101459337B - Stabilized control system capable of accurately cut load selection according to load path - Google Patents
Stabilized control system capable of accurately cut load selection according to load path Download PDFInfo
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- CN101459337B CN101459337B CN2008102049905A CN200810204990A CN101459337B CN 101459337 B CN101459337 B CN 101459337B CN 2008102049905 A CN2008102049905 A CN 2008102049905A CN 200810204990 A CN200810204990 A CN 200810204990A CN 101459337 B CN101459337 B CN 101459337B
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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
- 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
- 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 invention relates to a stable control system capable of accurately selecting load shedding according to the path of loads, which comprises a data acquisition module, a load path locating module, a path setting module, a calculation module, a load selecting module, a trigger module and an execution module and the like, wherein the load path locating module determines current various on-line loads and the power supply relationship between a plurality of power supply devices and various on-line loads according to the operation state of real-time loads which are collected by the acquisition module, thereby forming a corresponding circuit topological structure of an electricity consumption system, simultaneously the calculation module calculates load quantity which is needed to be cut off to guarantee power network to be steady when various systems are in a fault case, then the load selecting module selects corresponding loads which need to be cut off according the a calculation result and a priority level of various loads, which is set by the setting module, therefore, once going wrong, the execution module can rapidly make reactions and timely accurately cut off corresponding loads, thereby guaranteeing the power network to be steady, and reducing the production loss of the electricity consumption system when going wrong.
Description
Technical field
The present invention relates to a kind of stabilized control system, the particularly a kind of stabilized control system that can accurately select cutting load according to load path.
Background technology
For a power supply network system, especially important commercial power system, what pay close attention to the most is exactly the stable and reliable of supply network. but at present, in some large-scale commercial power systems, owing to reasons such as the instability of some supply network or power shortages, cause under accident, whole supply network is worn down, and then cause production to be interrupted, cause the economic loss that can't estimate.For this reason, for avoiding the collapse of the electric power system under accident, the way of generally taking to set up stabilized control system, mainly be for when accident appears in electric power system, cut away unessential load, keep the stability of electric power system, to guarantee main normally carrying out of producing.Be, aforesaid accident is meant the factor that can directly influence power supply stability with noting, for example, and with the interconnection protection tripping operation of using electricity system contact, crucial generator protection tripping operation etc.
The existing stabilized control system that is used for electric power system, when accident took place, its whole transformer station that normally will be correlated with was cut away.And for the commercial power system, especially big industrial system, its load path complexity, it is scattered that important commercial power load equipment disperses, in case cut away whole transformer station, the important production of part interrupted, and causes serious economy loss.Therefore, existing stabilized control system since can't realize scattered take care of the pence cut away load, so be difficult to satisfy the demand that has the commercial power system now.How to solve existing stabilized control system existing problems, make its demand that satisfies the commercial power system, become the technical task that those skilled in the art need to be resolved hurrily in fact.
Summary of the invention
The object of the present invention is to provide a kind of stabilized control system that can accurately select cutting load according to load path, to reduce the loss of commercial power system.
Reach other purposes in order to achieve the above object, the stabilized control system that can accurately select cutting load according to load path provided by the invention, in its multiloop using electricity system that is applied to power by many circuits by a plurality of power supply units, wherein, each load of described using electricity system is controlled its break-make by corresponding primary equipment control assembly respectively,, describedly can accurately select the stabilized control system of cutting load to comprise: to be arranged in the described using electricity system and to be used to gather the current real-time running state of a plurality of on-load switches or disconnecting link according to load path, and the data acquisition module of the current power load of respectively loading; Described a plurality of on-load switches that are connected with described data acquisition module and are used for gathering according to described data acquisition module or disconnecting link real-time running state determine that a plurality of power supply units described in current online each load and the described using electricity system and power supply between online each load concern the load path locating module with the loop topology structure that forms corresponding described using electricity system; Be used for setting contingent all fault types of described a plurality of power supply unit, and setting the setting module of the priority that a plurality of loads are cut according to the loop topology structure of described using electricity system; Be connected with described data acquisition module and be used for the loop topology structure according to described using electricity system, all fault types that set, determined current online each load operation state, and current power load size of each load of being gathered, calculate total supply load that each power supply unit that can power on the corresponding affected circuit under the different faults type of each setting cycle can provide, and in the selected supply line that need excise under the failure condition computing module of the power load of reality; Be used for total amount of power supply of calculating according to described computing module and keep the power load of system balancing needs excision when breaking down and load priority that described setting module sets is selected the load at specific electric load that needs are cut under each fault type and selected module; Be arranged in the described using electricity system, the trigger module of the fault-signal when being used to gather described using electricity system and breaking down and be connected with described trigger module and described a plurality of primary equipment control assembly, be used for determining fault type according to the fault-signal that described trigger module is gathered, and, send corresponding trip command to cut off corresponding Executive Module under determined fault type at specific electric load to corresponding primary equipment control assembly according to the online power load that the needs that described load selects module to select are cut.
Wherein, described load selects module can comprise that one is used to generate load Policy Table's generation unit, and wherein, described load Policy Table's row represent fault type, and row are represented needs the load that cuts off under the different faults type; Described Executive Module can comprise the logic processor of band cross-point matrix switching function etc.
In sum, of the present inventionly can accurately select the stabilized control system of cutting load can determine the loop topology structure of current using electricity system according to the state of each on-load switch of being gathered, disconnecting link according to load path, can accurately determine load path thus, in case fault takes place, can cut away corresponding load according to what fault type took care of the pence, to guarantee the stability of using electricity system.
Description of drawings
Fig. 1 is the basic framework schematic diagram that can accurately select the stabilized control system of cutting load according to load path of the present invention.
Fig. 2 is the conspectus of a using electricity system.
Fig. 3 is the load path schematic diagram that is connected to the 20KV bus.
Fig. 4 props up the generator circuit schematic diagram that connects load for band.
Fig. 5 is the circuit diagram with female connection.
Embodiment
See also Fig. 1, of the present invention can accurately the selection in the multiloop using electricity system that the stabilized control system of cutting load is applied to be powered by many circuits by a plurality of power supply units according to load path, wherein, each load of described using electricity system is controlled its break-make by corresponding primary equipment control assembly respectively, describedly can accurately select the stabilized control system of cutting load to comprise at least according to load path: data acquisition module, load path locating module, setting module, computing module, load are selected module, trigger module, and Executive Module etc.
See also Fig. 2, in the present embodiment, described a plurality of power supply unit comprises generator G1, G2, G3, G4, and the circuit on power system of two this locality, be 20kV bus (BUS) A and 20kV bus (BUS) B, wherein, bus A and bus B link by a female connection, on whole 20kV bus-bar system, a series of 20kV feeder line is connected with a plurality of loads, for example, pump (Pump), compressor (Compressor), forced draft fan (Blower) etc., in addition, each load all is correspondingly provided with on-load switch or disconnecting link, 6kV switch etc. for example, simultaneously, for each power supply unit, also be correspondingly provided with switch or disconnecting link, for example the 10kV switch, 20kV switch etc.
Described data acquisition module is arranged in the described using electricity system, is used to gather current real-time running state, and the current power load of respectively loading of a plurality of on-load switches, disconnecting link, and it can be measure and control device or combine and protects etc.For example, described data collecting module collected is to the 6kV switch closure, and the power consumption of respective pump (Pump) is 2MW.
Described load path locating module is connected with described data acquisition module, the described a plurality of on-load switches that are used for gathering, the state of disconnecting link real-time running state according to described data acquisition module determine current online each load, and described using electricity system described in a plurality of power supply units concern to form the loop topology structure of corresponding described using electricity system with power supply between online each load.Because the 6kV switch closure is promptly online so described load path locating module can determine that pump (Pump) is in running order, it is powered by generator G1 simultaneously.See also Fig. 3 again, between motor (Motor) load and 20kV bus, be provided with switch S 1, therefore have eight possible paths induction-motor load is connected with the 20kV bus, that is: to S14
·S1-S3-S4-S10-S11
·S2-S3-S4-S10-S11
·S1-S3-S4-S9-S12-S13-S14
·S2-S3-S4-S9-S12-S13-S14
·S5-S7-S8-S9-S10-S11
·S6-S7-S8-S9-S10-S11
·S5-S7-S8-S12-S13-S14
·S6-S7-S8-S12-S13-S14
The collection result of described data acquisition module is as follows:
S1, S3, S4 and S10 closure.
S2, S9, S14 disconnect.
Since communication failure, the unknown of S11 state
Therefore, according to the collection result of described data acquisition module, still can not be to power to the motor on the 380V certainly by 20kV bus A, yet, because bus B does not power to motor.Therefore, if the motor operation, then described load path locating module can determine that 20kV bus A powers to motor.
Described setting module is used for setting contingent all fault types of described a plurality of power supply unit, reaching and set the cut priority of described a plurality of loads according to the loop topology structure of described using electricity system.In the present embodiment, the fault type of setting is as follows:
Generator G1 10kV switch trip
Generator G1 20kV switch trip
Generator G2 10kV or 20kV switch trip
Generator G3 10kV switch trip
Generator G3 20kV switch trip
Generator G4 10kV switch trip
Generator G4 20kV switch trip
Electric power system interconnection LINE1 150kV or 20kV switch trip
Electric power system interconnection LINE2 150kV or 20kV switch trip
The female connection tripping operation of 20kV (bus A overload)
The female connection tripping operation of 20kV (bus B overload)
20kV bus A is in 1 section of low frequency
20kV bus A is in 2 sections of low frequencies
20kV bus B is in 1 section of low frequency
20kV bus B is in 2 sections of low frequencies
Why generator G1, G3, G4 have two kinds of faults, be to connect load, see also Fig. 4, though under two kinds of failure conditions owing between corresponding 10kV and 20kV switch (Breaker), having to prop up, the remaining energy output of described using electricity system is identical, but remaining load is different.Because if the tripping of 10kV switch, described using electricity system will lose the energy output of 10MW, but described using electricity system load remains unchanged; And if the tripping of 20kV switch, described using electricity system will lose the energy output of 10MW and the load of 2MW.Therefore, for generator G1, G3, G4,10kV and 20kV switch trip are set to two kinds of different faults.For generator G 2, two kinds of failure conditions are also arranged, promptly 10kV and 20kV switch trip do not connect load owing to prop up, and therefore at two kinds of failure conditions, the remaining energy output of described using electricity system is identical with load, is same fault so be set.In addition, for every electric power system interconnection (LINE1 and LINE2), connect load less than propping up at 150kV and 20kV switch room, therefore, when 150kV or 20kV switch trip, the remaining energy output of described using electricity system is also identical with load, so two kinds of situations are set at same fault.Also have, according to the power system operation situation, may be on the 20kV bus connection switch delivering power, power may be from bus A to bus B, also may be opposite.If the switch tripping can not reduce energy output.But one in two 20kV buses may the power disappearance.See also Fig. 5, as seen from the figure, bus A is by the power of bus connection switch to bus B transmission 5MW, and therefore, in case the bus connection switch tripping, bus B has promptly lacked the power of 5MW.Therefore, setting the female connection tripping operation of 20kV is two kinds of faults.
Described computing module is connected with described data acquisition module, be used for the loop topology structure according to described using electricity system, all fault types that set, determined current online each load, and current power load size of each load of being gathered, calculate total supply load that each power supply unit that can power on the corresponding affected circuit under the different faults type of each setting cycle can provide, and in the selected supply line that need excise under the failure condition power load of reality.Whether the loop topology structure of the described using electricity system that to be described computing module determine according to described load path locating module is can clear and definite each power supply unit in running order, the power supply unit that respectively is in operating state is to be connected bus A, or bus B, can calculate bus A according to the default amount of power supply of each power supply unit thus and go up available active power, bus B goes up the available active power on available active power and the female connection, correspondingly can calculate also that bus A goes up load power consumption, bus B goes up the load power consumption on load power consumption and the female connection.For example, generator G1 originally is connected bus A, and in the failure situations of its 10kV switch trip, total amount of power supply that described computing module calculates bus A is 10MW, and total power consumption is 15 MW.
Described load is selected module to be used for the total supply load that calculates according to described computing module and is kept the power load of system balancing needs excision when breaking down and load priority that described setting module sets selects that needs are cut under each fault type at specific electric load.For example, in the failure situations of the 10kV of generator G1 switch trip, described load selects module to select online pump (Pump) and forced draft fan (Blower) to be cut off.For the relation between the load that makes fault type and need cut away more clear, described load selects module to comprise that also one is used to generate load Policy Table's generation unit, wherein, each row of described load Policy Table is represented a fault type, each row representative needs the load that cuts off under the different faults type, see also following table:
| The 10kV switch trip of generator G1 | Pump (Pump) | ? | Forced draft fan (Blower) |
| The 20kV switch trip of generator G1 | ? | Compressor (Compressor) | ? |
| The 10kV of generator G2 or 20kV switch trip | ? | Pump (Pump) | ? |
| ...... | ...... | ...... | ...... |
Above-mentioned load Policy Table can upgrade accordingly according to the variation of practical situation, in the present embodiment, is updated once in its per 2 seconds.
Described trigger module is arranged in the described using electricity system, the fault-signal when being used to gather described using electricity system and breaking down.For example described trigger module collects the 10kV switch trip of generator G1 etc.
Described Executive Module is connected with the described trigger module and the described a plurality of primary equipment control assembly of addressing, be used for determining fault type according to the fault-signal that described trigger module is gathered, and the online power load of being cut according to the needs that described load selects module to select under determined fault type, it is corresponding to specific electric load to cut off to send corresponding trip command to corresponding primary equipment control assembly.For example, when described trigger module collects the 10kV switch trip of generator G1, described Executive Module determines that generator G1 breaks down, and according to above-mentioned load Policy Table, it can determine to cut away pump (Pump) and forced draft fan (Blower).In the present embodiment, described Executive Module comprises the logic processor of band cross-point matrix switching function, described cross-point matrix switching is corresponding mutually with above-mentioned load Policy Table, thus when fault takes place, can send the instruction of cutting off corresponding load fast, corresponding each on-load switch or disconnecting link are disconnected fast.
In sum, of the present inventionly can accurately select the stabilized control system of cutting load owing in advance the load of using electricity system and power supply unit have been carried out the path and determine, therefore according to load path, when fault takes place, can make a response fast, accurately cut away corresponding load, lower production loss as far as possible.
Claims (3)
1. an energy is accurately selected the stabilized control system of cutting load according to load path, in its multiloop using electricity system that is applied to power by many circuits by a plurality of power supply units, wherein, each load of described using electricity system is controlled its break-make by corresponding primary equipment control assembly respectively, describedly can accurately select the stabilized control system of cutting load to be characterised in that according to load path to comprise:
Data acquisition module, it is arranged in the described using electricity system, is used to gather current real-time running state, and the current power load of respectively loading of a plurality of on-load switches or disconnecting link;
The load path locating module, be connected with described data acquisition module, be used for the described a plurality of on-load switches gathered according to described data acquisition module or disconnecting link real-time running state and determine that a plurality of power supply units described in current online each load and the described using electricity system and power supply between online each load concern to form the loop topology structure of corresponding described using electricity system;
Setting module is used for setting contingent all fault types of described a plurality of power supply unit, and setting a plurality of by the priority of cutting load according to the loop topology structure of described using electricity system;
Computing module, be connected with described data acquisition module, be used for the loop topology structure according to described using electricity system, all fault types that set, determined current online each load operation state, and current power load size of each load of being gathered, calculate total supply load that each power supply unit that can power on the corresponding affected circuit under the different faults type of each setting cycle can provide, and in the selected supply line that need excise under the failure condition power load of reality;
Load is selected module, is used for the total supply load that calculates according to described computing module and keeps the power load of system balancing needs excision when breaking down and load priority that described setting module sets selects that needs are cut under each fault type at specific electric load;
Trigger module is arranged in the described using electricity system, the fault-signal when being used to gather described using electricity system and breaking down; And Executive Module, be connected with described trigger module and described a plurality of primary equipment control assembly, be used for determining fault type according to the fault-signal that described trigger module is gathered, and the online power load of being cut according to the needs that described load selects module to select under determined fault type, it is corresponding to specific electric load to cut off to send corresponding trip command to corresponding primary equipment control assembly.
2. the stabilized control system that can accurately select cutting load according to load path as claimed in claim 1, it is characterized in that: described load selects module to comprise that one is used to generate load Policy Table's generation unit, wherein, described load Policy Table's row represent fault type, and row are represented needs the load that cuts off under the different faults type.
3. the stabilized control system that can accurately select cutting load according to load path as claimed in claim 1 or 2 is characterized in that: described Executive Module comprises the logic device of band crosspoint matrix function.
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| CN2008102049905A CN101459337B (en) | 2008-12-30 | 2008-12-30 | Stabilized control system capable of accurately cut load selection according to load path |
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| CN2008102049905A CN101459337B (en) | 2008-12-30 | 2008-12-30 | Stabilized control system capable of accurately cut load selection according to load path |
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| CN101459337B true CN101459337B (en) | 2011-12-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101588068B (en) * | 2009-06-19 | 2011-05-11 | 国网电力科学研究院 | Automatic load-reducing control method for integrating the voltage frequency dynamic mutual influence |
| CN102437653B (en) * | 2011-12-28 | 2015-03-25 | 国网上海市电力公司 | Power flexible load control system and control method thereof |
| CN103259600A (en) * | 2013-05-20 | 2013-08-21 | 国家电网公司 | Voice communication interface device for debugging stable control system |
| CN103956748B (en) * | 2014-03-31 | 2016-01-06 | 国家电网公司 | The fault recovery scheme generation method of load transfer plan during a kind of many bus loss of pressure |
| CN105024358A (en) * | 2015-08-10 | 2015-11-04 | 国网上海市电力公司 | Working method of fault equivalence and intra-station load transfer module |
| CN106300339B (en) * | 2016-08-29 | 2018-08-14 | 国电南瑞科技股份有限公司 | A kind of Fault Isolation based on unit style power distribution network and service restoration method |
| CN106549387B (en) * | 2016-12-09 | 2019-11-22 | 国网北京市电力公司 | The methods, devices and systems of distribution load |
| DE102018100627B4 (en) * | 2018-01-12 | 2019-10-10 | Krohne Messtechnik Gmbh | Electrical device with a fused and an unsecured functional device |
| CN108711863A (en) * | 2018-05-09 | 2018-10-26 | 深圳供电局有限公司 | A kind of stabilized control system and its cutting load method |
| CN110289680A (en) * | 2019-05-30 | 2019-09-27 | 珠海派诺科技股份有限公司 | Method of supplying power to, the apparatus and system of load |
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