CN106026108A - Load shedding method of stability control system of considering power grid safety accident risk - Google Patents
Load shedding method of stability control system of considering power grid safety accident risk Download PDFInfo
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- CN106026108A CN106026108A CN201610464284.9A CN201610464284A CN106026108A CN 106026108 A CN106026108 A CN 106026108A CN 201610464284 A CN201610464284 A CN 201610464284A CN 106026108 A CN106026108 A CN 106026108A
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- Prior art keywords
- cutting load
- load shedding
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- cutting
- station
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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
-
- 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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a load shedding method of a stability control system of considering a power grid safety accident risk. The method comprises the following steps: (1) all load shedding execution stations collect respective shedded loads and transmit to a load shedding master station; (2) the load shedding master station communicates with an energy management system of all levels of power grid dispatching management systems, obtains the total loads of all levels of power grids, and calculates the maximum shedding allowable loads, which do not cause general and above electric power safety accidents, of the power grids according to the electric power safety accident grading standard; (3) the load shedding master station receives a load shedding instruction issued by a stability control master station, and carries out matching in predetermined priority according to the maximum shedding allowable loads of the power grids and the shedded loads transmitted by all load shedding execution stations, namely the load shedding execution stations which finally execute the load shedding instruction are selected; and (4) the selected load shedding execution stations finish the load shedding instruction according to the requirements of the load shedding master station. By the load shedding method of the stability control system, the power grid safety accident caused by a load shedding action of a stability control device can be effectively avoided.
Description
Technical field
The invention belongs to power system safety and stability and control technical field, be specifically related to a kind of consider the steady of power grid security accident risk
Ore-controlling Role cutting load method.
Background technology
Along with the fast development of UHV AC/DC Transmission Technology, the interconnection between regional power grid is constantly strengthened.In order to adapt to China
Energy resources and energy demand are the feature of contrary distribution, and following regional power grid send/and the trend of receiving end is more and more obvious.For receiving end
For electrical network, important by electric channel generation catastrophe failure, such as twice important ac transmission passage trips simultaneously, or drop point
There is locking in the one or more rounds extra-high voltage direct-current of one's respective area, receiving end electrical network will be caused to produce bigger active power vacancy simultaneously,
Other may be caused to be transshipped because of power flow transfer by electric channel, or cause substantially falling or even surely of receiving end mains frequency and voltage
Fixed destruction.According to " guiding rules of power system safety and stability ", power system occurs to allow during above-mentioned catastrophe failure take machine of cutting and cut negative
The stability contorting measures such as lotus.For receiving end electrical network, cutting load measure can improve operation of power networks frequency and voltage, prevents steady
Fixed destruction, it is also possible to alleviate the overload situations of relevant device, be one of now widely used stability contorting measure.
At present the method for stability control device cutting load has two classes: a class can not gather can cutting load amount, can only add up according to historical data
Presetting corresponding cutting load switch, actual cutting load amount can not accurately control；Another kind of can gather all cutting loads and open
Close can cutting load amount, realize the accurate control of device cutting load amount by predetermined priority.But this two classes method all exists one
Deficiency, subtracting for load proportion (cutting load total amount and the ratio of network load total amount) of the most uncontrollable electrical network.State Council the 599th
Command " electric power safety accident emergency is disposed and regulations of investigating " cause electrical network to subtract the ratio for load to power ampere in accident
Full incident classification is divided.Therefore, for avoiding general and above electric power safety accident, it is necessary to strict control subtracts for negative
Lotus ratio, it is necessary to design a kind of stabilized control system cutting load method considering power grid security accident risk.
Summary of the invention
Solved by the invention technical problem is that, for the deficiencies in the prior art, it is provided that a kind of consider power grid security accident risk
Stabilized control system cutting load method, gather simultaneously all cutting loads perform station stability control device can cutting load amount and electrical network at different levels negative
Lotus total amount, controls to subtract for load proportion, it is to avoid because stability control device cutting load action causes power grid security accident.
For reaching above-mentioned purpose, technical scheme provided by the present invention is:
A kind of stabilized control system cutting load method considering power grid security accident risk, stabilized control system includes Wen Kong main website, Wen Kong main website
The cutting load main website of subordinate, each cutting load of cutting load main website subordinate perform station and grid dispatching management system at different levels；Described
Wen Kong main website is connected with the cutting load master station communication of its subordinate, and cutting load main website and each cutting load of its subordinate perform to stand and each
Level grid dispatching management system communication connection；
Its cutting load method comprises the following steps:
Step 1: all cutting loads perform station stability control device gather respective can cutting load amount, and on give cutting load main website；
Step 2: cutting load main website and the EMS communication of grid dispatching management systems at different levels, obtains the load of electrical network at different levels
Total amount, according to the electric power safety accident etc. in State Council the 599th command " electric power safety accident emergency is disposed and regulations of investigating "
The level criteria for classifying calculates the maximum of the electrical networks at different levels not causing general and above electric power safety accident and permits cutting load amount；
Step 3: cutting load main website accepts the cutting load instruction that Wen Kong main website issues, according to the maximum of electrical networks at different levels permit cutting load amount and
All cutting loads perform station stability control device on send can cutting load amount, mate by predetermined priority, i.e. select finally to hold
The cutting load of row cutting load instruction performs station；Principle be each middle choosing cutting load perform station can cutting load total amount should meet cut negative
The total amount requirement of lotus amount instruction, makes the cutting load amount sum of electrical network at different levels permit cutting load amount less than the maximum of this grade of electrical network again.
Step 4: select cutting load to perform station in each and switch by the cutting load corresponding cutting load of master request tripping, complete cutting load instruction.
Described each cutting load performs the priority that station is predetermined, performs station according to each cutting load equal for importance and each department of on-load
The principle of even distribution determines；It is the lowest for on-load importance that cutting load performs station, then its priority is the highest；Otherwise it is the lowest；Various places
District's uniform distribution principle refers to: if cutting load main website has N number of subordinate's cutting load to perform station in certain area, make N number of cutting load as far as possible
Perform station and be in different priority.Such as, cutting load main website has 3 cutting loads to perform station in certain area, cuts 3 as far as possible
Load performs to stand and is not placed on same priority, but the first prioritization schemes one, the second prioritization schemes one, the 3rd is preferential
Level arranges one, thus is avoided that and concentrates the load excising some area prematurely.
The advantage of stability control device cutting load method of the present invention is: gather simultaneously all cutting loads perform station stability control device cut negative
The load total amount of lotus amount and electrical network at different levels, determines that the maximum of electrical network at different levels permits cutting load amount, in being guaranteed finally by priority match
The cutting load execution station selected meets the total amount of cutting load instruction simultaneously and requires to subtract with electrical networks at different levels to supply load proportion requirement, it is to avoid because of steady
Control device cutting load action causes power grid security accident.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention；
Fig. 2 is the structure chart of stabilized control system in the present invention；
Fig. 3 is certain provincial power network stabilized control system schematic diagram in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
As it is shown in figure 1, the invention provides a kind of stabilized control system cutting load method considering power grid security accident risk, stabilized control system
As in figure 2 it is shown, include that Wen Kong main website, the cutting load main website of Wen Kong main website subordinate, each cutting load of cutting load main website subordinate perform
Stand and grid dispatching management system at different levels；Described Wen Kong main website is connected with the cutting load master station communication of its subordinate, cutting load main website
Station and grid dispatching management system at different levels communication connection is performed with each cutting load of its subordinate；
It comprises the following steps:
Step 1: all cutting loads perform station stability control device gather respective can cutting load amount, and on give cutting load main website；
Step 2: cutting load main website and the EMS communication of grid dispatching management systems at different levels, obtains the load of electrical network at different levels
Total amount, calculates the electrical networks at different levels not causing general and above electric power safety accident according to the electric power safety incident classification criteria for classifying
Maximum fair cutting load amount；
Step 3: cutting load main website accepts the cutting load instruction that Wen Kong main website issues, according to the maximum of electrical networks at different levels permit cutting load amount and
All cutting loads perform station stability control device on send can cutting load amount, mate by predetermined priority, i.e. choose and finally hold
The cutting load of row cutting load instruction performs station；Principle be each middle choosing cutting load perform station can cutting load total amount should meet cut negative
Cutting load total amount requirement in the instruction of lotus amount, makes the cutting load amount sum of electrical network at different levels permit less than the maximum of this grade of electrical network again and cuts
Loading.
Step 4: select cutting load to perform station in each and switch by the cutting load corresponding cutting load of master request tripping, complete cutting load instruction.
Described each cutting load performs the priority that station is predetermined, performs station according to each cutting load equal for importance and each department of on-load
The principle of even distribution determines；It is the lowest for on-load importance that cutting load performs station, then its priority is the highest；Otherwise it is the lowest；Various places
District's uniform distribution principle refers to: if cutting load main website has N number of subordinate's cutting load to perform station in certain area, make N number of cutting load as far as possible
Perform station and be in different priority.Such as, cutting load main website has 3 cutting loads to perform station in certain area, cuts 3 as far as possible
Load performs to stand and is not placed on same priority, but the first prioritization schemes one, the second prioritization schemes one, the 3rd is preferential
Level arranges one, thus is avoided that and concentrates the load excising some area prematurely.
Embodiment 1:
As a example by the stabilized control system of certain provincial power network of China (being designated as P1), illustrate to consider the stabilized control system of power grid security accident risk
The application in provincial power network stabilized control system of the cutting load method.This provincial power network is made up of four prefecture-level electrical networks, be designated as respectively A1,
A2, A3 and A4, wherein A1 is provincial capital.The stabilized control system of this provincial power network include a Ge Wenkong main website M, one cut negative
Lotus main website C and 12 cutting loads perform station E1～E12, wherein Wen Kong main website M, cutting load main website C and cutting load perform station E1～
E3 is respectively positioned on prefecture-level electrical network A1, E4～E6 and is positioned at prefecture-level electrical network A2, E7～E9 and is positioned at prefecture-level electrical network A3, E10～E12
It is positioned at prefecture-level electrical network A4, as shown in Figure 3.
Assuming that the network load information at different levels that certain moment cutting load main website C obtains are as follows: the load total amount of provincial power network P1 is
14000MW, the load total amount of prefecture-level electrical network A1 is 5000MW, and the load total amount of prefecture-level electrical network A2 is 2000MW, prefecture-level electricity
The load total amount of net A3 is 3000MW, and the load total amount of prefecture-level electrical network A4 is 4000MW.That send on each cutting load execution station cuts
Loading information is as follows: cutting load execution station E1～E3 cutting load amount can be can cutting load amount being of 200MW, E4～E7
150MW, E8～E12 cutting load amount can be 100MW.Predetermined priority is followed successively by E1～E12 from high to low.According to State Council
599th command, for avoiding general and above power grid security accident, cutting load main website calculates this moment provincial power network P1
Big fair cutting load amount is 14000 × 6%=840MW, and the maximum of prefecture-level electrical network A1 permits cutting load amount to be 5000 × 10%=500MW, ground
The maximum of city-level electrical network A2 permits cutting load amount to be 2000 × 20%=400MW, and the maximum of prefecture-level electrical network A3 permits cutting load amount to be 3000
× 20%=600MW, the maximum of prefecture-level electrical network A4 permits cutting load amount to be 4000 × 20%=800MW.If now electrical network occurs certain serious
Fault, it is 800MW that Wen Kong main website M is handed down to the cutting load instruction of cutting load main website C.Cutting load main website C is according to correlated information match
The result that final cutting load performs station is as shown in table 1.
Table 1 cutting load main website C is according to the matching result of relevant information
As known from Table 1, the execution station of final selected execution cutting load instruction is E1, E2, E4, E5 and E8.Cutting load total amount is
200+200+150+150+100=800MW, meets the requirement of cutting load instruction total amount, permits again smaller than the maximum of this provincial power network simultaneously
Cutting load amount 840MW, does not results in power grid security accident.The cutting load amount of prefecture-level electrical network A1 is 200+200=400MW, is less than
Its maximum fair cutting load amount 500MW；The cutting load amount of prefecture-level electrical network A2 is 150+150=300MW, less than its maximum fair cutting load amount
400MW；The cutting load amount of prefecture-level electrical network A3 is 100MW, less than its maximum fair cutting load amount 600MW；Three does not all result in electricity
Net security incident.
If not applying the stability control device cutting load method of the present invention, performing station priority according to predetermined cutting load merely and carrying out action,
The execution station the most finally performing cutting load instruction is E1, E2, E3, E4 and E5.Cutting load total amount is
200+200+200+150+150=900MW, meets the requirement of cutting load instruction total amount, but the maximum having exceeded this provincial power network permits
Cutting load amount 840MW, will constitute general power grid accident.Meanwhile, the cutting load amount of prefecture-level electrical network A1 is 200+200+200=600MW,
More than its maximum fair cutting load amount 500MW, general power grid security accident also will be constituted.
Above-mentioned relative analysis shows, it is considered to the stabilized control system cutting load method of power grid security accident risk is negative with according to priority cutting merely
Lotus method is compared, and can not only meet the total amount requirement of cutting load instruction, and can also meet electrical network at different levels to subtracting for load proportion
Requirement, it is to avoid because stability control device cutting load action causes power grid security accident, it is adaptable to dispatchings of power netwoks at different levels run.
The present invention is illustrated according to specific embodiment, but above-described embodiment limits the present invention, all employings etc. the most in any form
The technical scheme obtained with the form of replacement or equivalent transformation, within all falling within protection scope of the present invention.
Claims (2)
1. the stabilized control system cutting load method considering power grid security accident risk, it is characterised in that comprise the following steps:
Step 1: all cutting loads perform station stability control device gather respective can cutting load amount, and on give cutting load main website；
Step 2: cutting load main website and the EMS communication of grid dispatching management systems at different levels, obtains the load of electrical network at different levels
Total amount, calculates the electrical networks at different levels not causing general and above electric power safety accident according to the electric power safety incident classification criteria for classifying
Maximum fair cutting load amount；
Step 3: cutting load main website accepts the cutting load instruction that Wen Kong main website issues, according to the maximum of electrical networks at different levels permit cutting load amount and
All cutting loads perform station stability control device on send can cutting load amount, mate by predetermined priority, i.e. choose and finally hold
The cutting load of row cutting load instruction performs station；Principle be each middle choosing cutting load perform station can cutting load total amount should meet cut negative
Cutting load total amount requirement in the instruction of lotus amount, makes the cutting load amount sum of electrical network at different levels permit less than the maximum of this grade of electrical network again and cuts
Loading；Step 4: select cutting load to perform station in each and switch by the cutting load corresponding cutting load of master request tripping, complete cutting load
Instruction.
The stabilized control system cutting load method of consideration power grid security accident risk the most according to claim 1, it is characterised in that
Described each cutting load performs the priority that station is predetermined, performs station according to each cutting load and supplies the importance of on-load and each department uniformly to divide
The principle joined determines；It is the lowest for on-load importance that cutting load performs station, then its priority is the highest；Otherwise it is the lowest；Each department are equal
Even distribution principle refers to: if cutting load main website has N number of subordinate's cutting load to perform station in certain area, make N number of cutting load perform as far as possible
Station is in different priority.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610464284.9A CN106026108A (en) | 2016-06-23 | 2016-06-23 | Load shedding method of stability control system of considering power grid safety accident risk |
Applications Claiming Priority (1)
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| CN201610464284.9A CN106026108A (en) | 2016-06-23 | 2016-06-23 | Load shedding method of stability control system of considering power grid safety accident risk |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107134787A (en) * | 2017-06-23 | 2017-09-05 | 国网江苏省电力公司电力科学研究院 | Urgent accurate cutting load control system and cutting load method based on distributed feeder automation |
| CN107749623A (en) * | 2017-11-08 | 2018-03-02 | 贵州电网有限责任公司 | Single busbar trip loss of electrical load accident grade decision method under double bus scheme mode |
| CN109193618A (en) * | 2018-08-20 | 2019-01-11 | 许继集团有限公司 | A kind of cutting load method of accurate cutting load control system |
| CN110350595A (en) * | 2019-06-19 | 2019-10-18 | 国网河南省电力公司 | The load high-speed decision control method for maintaining subregion section stable under accident condition |
| CN110445119A (en) * | 2019-07-19 | 2019-11-12 | 南方电网科学研究院有限责任公司 | A kind of more direct currents collaboration stable control method, device and equipment |
| CN111668880A (en) * | 2020-06-16 | 2020-09-15 | 聊城信源集团有限公司 | Generator set coordination control device and method based on regional power grid stability control system |
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| CN111668880A (en) * | 2020-06-16 | 2020-09-15 | 聊城信源集团有限公司 | Generator set coordination control device and method based on regional power grid stability control system |
| CN111668880B (en) * | 2020-06-16 | 2024-01-30 | 聊城信源集团有限公司 | Generator set coordination control device and method based on regional power grid stability control system |
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