CN110289628A - A kind of active uneven method for rapidly positioning of bus based on multi-source data and system - Google Patents
A kind of active uneven method for rapidly positioning of bus based on multi-source data and system Download PDFInfo
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- CN110289628A CN110289628A CN201910515746.9A CN201910515746A CN110289628A CN 110289628 A CN110289628 A CN 110289628A CN 201910515746 A CN201910515746 A CN 201910515746A CN 110289628 A CN110289628 A CN 110289628A
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
This application involves a kind of active uneven method for rapidly positioning of bus based on multi-source data and systems, include the following steps: (1) if uneven bus is 500kV voltage class, then by the SCADA of each branch of bus connection, active data and the real-time active data of WAMS are compared in real time, if the error of two kinds of data is greater than 5MW, it then determines that this route is defect route, and defect elimination processing is carried out to this route；(2) if uneven bus is 220kV voltage class, then the SCADA of each branch of bus connection is measured with state estimation, to the real-time active data of end line, if the error of two kinds of data is greater than 3MW, it is determined that this branch is defect route, and carries out defect elimination processing to this branch.Solve the problem of that existing bus power imbalance administering method is unable to satisfy the active unbalanced fast weak positioning of bus and influences power grid security, high-quality and economical operation with processing.
Description
Technical field
The application belongs to electric power netting safe running technical field, active not more particularly, to a kind of bus based on multi-source data
Balance method for rapidly positioning and system.
Background technique
With the continuous development of power industry, the effect of automation system for the power network dispatching seems more important, wherein female
It is the important indicator examined to power quality that whether linear heat generation rate, which balances, has directly reacted the operation conditions of power grid.If
The unbalanced failure of bus emergent power, then must timely be analyzed the reason of generating failure, and for generation
The reason of effectively administered, to guarantee the normal and safe of operation of power networks.
Existing part document analyzes bus power imbalance at present: (bus active power is uneven former for document [1]
Because of analysis and processing [J] Jiangxi Electric Power, 2010,34 (4): 27-29) the active unbalanced reason of bus is analyzed, and be based on
Bus balance sheet, big error dot table and the suspicious data table that the EMS OPEN-3000 system integration provides propose the active injustice of bus
Weigh administering method, effectively increases treatment effeciency, OPEN-3000 system is at present in most area substantially by D5000 system
Replace, this method timeliness is insufficient.
Document [2] (analysis of electric system plant stand end bus power uneven reason and the North China solution research [J] electricity
Power technology, 2015 (9)) the detailed analysis unbalanced a variety of causes of plant stand end bus power and corresponding solution.Text
Offering [3] (bus power imbalance administering method [J] Low Carbon World, 2016 (20): 51-52) Main Analysis leads to bus function
The unbalanced factor of rate, and propose the unbalanced administering method of bus power.(dispatching terminal extra-high voltage near region is female for document [4]
Linear heat generation rate imbalance analysis and research [C] China Electrical Engineering Society nd Annual Meeting collection, 2015:1-6) give normal station and
Intelligent station bus power imbalance administering method.But the non-system of document [2-4] provides the localization method of defect route, practical to grasp
There is certain limitation in work.Document [5] (it is electrical to improve the 35kV substation 35kV bus power balance rural area qualification rate [J]
Change, 2018,376 (09): 59-60) from the angle analysis of company, the county unbalanced reason of 35kV bus power and administering method,
It is practical compared with fitting engineering, but dealing with objects is only single voltage class.
It can be seen that be difficult to meet the D5000 scheduling active unbalanced fast weak of system median generatrix fixed for existing method
Position and processing, influence power grid security, high-quality and economical operation.
Summary of the invention
The technical problem to be solved by the present invention is being unable to satisfy bus to solve existing bus power imbalance administering method
The problem of active unbalanced fast weak positioning is with handling, influencing power grid security, high-quality and economical operation, provides one kind and is based on
The active uneven method for rapidly positioning of the bus of multi-source data and system.
The technical solution adopted by the present invention to solve the technical problems is: a kind of active injustice of bus based on multi-source data
Weighing apparatus method for rapidly positioning and system, the method for rapidly positioning include the following steps:
Step 1, the voltage class of uneven bus is determined；
Step 2, if uneven bus is 500kV voltage class, by the SCADA of each branch of bus connection
(Supervisory Control and Data Acquisition, the monitoring of operation of power networks stable state) real-time active data and WAMS
(Wide Area Measurement System, Real-Time Dynamic Monitoring System of Power system also known as wide area synchronized phase measurement system
System) real-time active data compare, if the error of two kinds of data be greater than setting error, it is determined that this route be defect line
Road, and defect elimination processing is carried out to this route；Otherwise, then determine that the route is normal；
Step 3, if uneven bus is 220kV voltage class, by the SCADA measuring value point of each branch of bus connection
It is not compared with Data of State Estimation, to the real-time active data of end line, if the error of data is greater than given threshold, really
Fixed this branch is defect route, and carries out defect elimination processing to this branch；Otherwise, then determine that this branch is normal.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, in step 2, according to 500kV
The historical data of voltage class bus selects the bus uneven out-of-limit serious period, samples and connect on 500kV voltage class bus
The active data of the corresponding SCADA history of each branch and the active data of WAMS history connect, and the SCADA history of sampling is active
Data and the active data of WAMS history compare, if two kinds of data errors are greater than setting error, it is determined that this branch is scarce
Route is fallen into, and defect elimination processing is carried out to this branch；Otherwise, then determine that this branch is normal.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, in step 3, according to 220kV
The historical data of voltage class bus selects the bus uneven out-of-limit serious period, samples each branch ins and outs difference electricity and function
This branch is positioned as defect route if error amount is greater than the set value by rate integral, both comparisons error；Otherwise, it determines should
Branch is normal.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, the ins and outs difference electricity is logical
It misses the stop and electric energy metering device is held to survey to obtain, the power integral leads to SCADA measurement power calculation by main website and obtains.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, the historical data of sampling
Period was less than 1 hour.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, the defect line that will be oriented
Road carries out specific aim analysis and handles with defect elimination, and emphasis is checked in field measurement device accuracy, chugging threshold and circulation and sent
Period facilities, telecontrol device clock, the preposition operating condition of link state and main website.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, in step 2, error is set
For 5MW.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, in step 3, given threshold
For 3MW.
Further, according to the active uneven method for rapidly positioning of bus provided by the present application, setting value 5%.
The application also provides a kind of bus active uneven quick positioning system, comprising:
Busbar voltage confirmation module, for confirming the voltage class of uneven bus；
Defect location module, for positioning defect route, it may be assumed that for 500V voltage class according to different voltages grade
Bus determines defect route by comparing the real-time active data of each branch SCADA and the real-time active data of WAMS；For
220V voltage class, then by the SCADA measuring value of each branch respectively with Data of State Estimation, to the real-time active data of end line
It compares, determines defect route；
Defect elimination module, for carrying out defect elimination processing to defect route.
The beneficial effects of the present invention are: spy of the present invention using multi-source datas such as SCADA, WAMS, electric flux, state estimations
It is active unbalanced scarce to bus is caused to be utilized respectively real time data and historical data for the bus of two kinds of voltage class for point
Sunken route carries out comprehensive quick positioning, and the validity and accuracy of the method for the present invention are high.
Detailed description of the invention
The technical solution of the application is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the localization method flow chart of the embodiment of the present application；
Fig. 2 is the active uneven curve graph of the embodiment of the present application 2.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
It is described in detail the technical solution of the application below with reference to the accompanying drawings and in conjunction with the embodiments.
Bus power balance refers to: assuming that flowing into the active of certain node is positive value, leaving the active of this node is negative value, then
The active algebraical sum for relating to this node is equal to zero, it may be assumed that
Wherein, pkIt is k-th of entrance or the active power for leaving certain node, is to flow through k-th to be connected with the node
The active power of branch.
But in power grid actual motion, due to line loss and voltage current transformer, measure and control device, data communication network
There may be defects for all too many levels such as shutdown, dispatch data net, front device, lead to the links error such as active measurement, transmission, pass
The active measuring value algebraical sum of the defeated node to main station side is usually not equal to zero, which is the active amount of unbalance of node bus, by
Δ p is indicated:
For 220kV bus, it is desirable that Δ p is no more than 10MW；For 500kV and above bus, it is desirable that Δ p is not
More than 20MW.The active uneven related work of administering of bus is mainly to find out defect route and equipment, and carry out defect elimination processing
To guarantee the active amount of unbalance of bus in claimed range.
The present embodiment provides a kind of active uneven method for rapidly positioning of bus based on multi-source data, as shown in Figure 1, packet
It includes:
Step 1, the voltage class for determining uneven bus understands the active uneven threshold crossing time section of bus and serious journey
Degree；
Step 2, if active imbalance bus is 500kV voltage class, directly on the basis of most accurate WAMS data
Defect location is carried out, wherein detailed process is as follows using real time data:
The wiring diagram of active uneven bus, Yi Jimu are checked by the power plant D5000-SCADA -/500kV substation interface
The active real-time change situation of each branch of line connection, emphasis closes if certain branch data refreshes relatively slow (period is more than 10 seconds)
Note；Searching the WAMS real-time measurement for corresponding to each branch on bus has work value, is respectively compared the real-time of WAMS and SCADA in each branch
Two kinds of biggish routes of difference value data (being greater than 5MW) are positioned as defect route by active data.
SCADA is most basic one of the application of Dispatching Control System, is responsible for reception, analysis and processing data acquisition applications and send
The stable state real time data come, realizes the monitoring and equipment control of electric system real time execution steady state information, and mentions for other application
For reliable steady state data basis and service.The active amount of unbalance of bus is that SCADA metric data is calculated by plug-in
Out.
Target dynamic realtime number when WAMS is mainly unified using the high-precision, band sent in the acquisition of synchronized phase measurement unit
According to the dynamic process of electrical power system wide to region carries out accurate measurements and analysis.WAMS data precision is high, and timeliness is strong,
It is substantially zeroed by its calculated active amount of unbalance of bus of measurement, therefore can be used as the important ginseng that SCADA measures defect location
It examines, but it can not handle the problems such as 220kV bus is active uneven.
Step 3, if active imbalance bus is 220kV voltage class, no corresponding WAMS data are made reference, then need to utilize shape
State estimated data, opposite end track data, electric energy data carry out defect location, wherein utilizing the detailed process of real time data such as
Under:
Check the active situation of change of each branch of active uneven bus company, institute, paying close attention to the refresh cycle is more than 10 seconds
Route；It compares that the actual measurement of each branch is active to be had work value with state estimation, have work value to end line actual measurement respectively, 3MW will be differed by more than
Line location be defect route.
State estimation is the basic application of Power System Steady-state analysis, is that power grid automatically controls, dispatcher training is simulated, safety is steady
The basis of the applications such as setting analysis.The main purpose of state estimation is maintenance one complete and reliable real-time grid status data
Library provides real time operation mode data (electric network model and state) for other analysis applications, and provides real-time grid for dispatcher
Monitoring screen.State estimation calculating is the core of the function, uses grid equipment parameter, power network topology connection relationship, real-time amount
Measured data calculates the optimal estimation value of each measurement of power grid.Therefore, it is auxiliary to can also be used for the active imbalance of bus for Data of State Estimation
Help analysis.
Step 4, uneven bus active for 500kV voltage class checks reality since the active fluctuation situation of route is complicated
When data can not accurately position defect route comprehensively, therefore also need combine historical data carry out assistant analysis:
Firstly, the selection bus uneven out-of-limit more serious period (since WAMS data volume is big, should be less than 1 hour)；From
Sampled data query window exports in the period the active SCADA metric data of each route on bus；From WAMS historical data point
Analysis interface exports the period each route and corresponds to WAMS metric data；The two gap larger (being greater than 5MW) is found out in comparison or variation is not
Synchronous route.
Step 5, uneven bus active for 220kV voltage class also needs benefit to improve faulty circuit positioning accuracy
It is further analyzed with electric energy data:
Into electric energy metered system, voltage selected by (optional bus uneven out-of-limit serious period) etc. was checked in certain period
(main website measures power by SCADA to the ins and outs difference electricity (end electric energy metering device of standing surveys to obtain) and power integral of grade route
It is calculated), both comparisons gap larger (being greater than 10%) is positioned as defect route.
Electric energy metered system mainly realizes power plant's online, off line and interconnection critical point point electric flux metering, deposits at times
Storage, acquisition and processing, to settle accounts and analysis provides master data.Generated energy acquisition is not high to requirement of real-time, but to simultaneity
More demanding, bus electric quantity balancing is similarly important performance assessment criteria.In electric energy metered system, each plant stand ins and outs can be consulted
Poor electricity, certain equipment electricity consumption that plant stand ammeter measures as in certain time.In addition, the system also has power integral
Computing function calculates the power integral in the corresponding period according to certain equipment SCADA measured power, when bus electricity is uneven
When weighing apparatus, biggish equipment can be differed with ins and outs difference electricity by searching for power integral and carries out auxiliary defect elimination processing.The function is used for reference,
The application utilizes the active imbalance problem route of electric energy data auxiliary positioning bus.
Step 6, the defect elimination processing of defect route: the defect route oriented in above-mentioned steps 1- step 5 is directed to
Property analysis with defect elimination handle, emphasis check field measurement device accuracy, chugging threshold and circulation on send the period be arranged feelings
The contents such as condition, telecontrol device clock, the preposition operating condition of link state and main website.
Embodiment 1
The present embodiment carries out method of the invention detailed by taking Henan 500kV substation high-voltage side bus (500kV) as an example
It describes in detail bright:
(1) real-time data analysis
It is connected with 5 branches (branch 1- branch 5) and 3 main transformers (main transformer 1- main transformer 3) on bus, compares 8 first
The real-time SCADA and WAMS data of branch, the discovery 3 active measuring value of high-pressure side SCADA of synchronization main transformer are always less than WAMS amount
Therefore 3 place line location of main transformer is faulty circuit by measured value 10MW or so, list the comparison of both 3 moment and be shown in Table 1.Other
Occasionally there are SCADA datas to refresh slow problem for route, need to further analyze in conjunction with historical data.
Table 1
(2) historical data analysis
It exports in the active imbalance of certain day bus out-of-limit more serious one hour, SCADA and WAMS is measured each
The active fluctuation of the active historical data of branch, comparison discovery branch 5 becomes apparent compared with All other routes, and bus is active when its fluctuation
Amount of unbalance is larger, but the route SCADA data has certain lag compared with WAMS data, and there are SCADA datas to refresh slowly
Problem, therefore branch 5 is positioned as faulty circuit.
(3) defect elimination is handled
According to above-mentioned analysis, live emphasis checks faulty circuit main transformer 3 and branch 5: by comparing 3 high-pressure side of main transformer
It is relatively low compared with WAMS to find that its SCADA measures voltage, electric current for SCADA and WAMS metric data.It, will on the basis of WAMS data
3 measure and control device of main transformer adjusts to 1.005 the channel factor of high-pressure side three-phase voltage and electric current by 1,3 high-pressure side of main transformer after adjustment
The SCADA measuring value and WAMS of voltage and current are close.Check that each branch power mutation threshold, discovery 5 threshold of branch are set as
1% (active fluctuation about 8MW is sent on just changing), other branch thresholds are set as 0.2%, attempt 5 chugging door of branch
Sill are adjusted to 0.2% but equipment storage function malfunctions, and replace modification parameter success after CPU board.In addition main by branch 1- branch 5
Becoming in the circulation of 1- main transformer 3 send the period to be changed to 10 seconds by 15 seconds.
Through above-mentioned processing, the active SCADA measuring value in 3 high-pressure side of main transformer and WAMS are close；It is sent on 5 changed power of branch bright
It is aobvious to accelerate；The active uneven threshold crossing time of A-bus is reduced to 1% by 10%, which does not adjust examination by net again.
Embodiment 2
The present embodiment is described in detail the method for the present invention by taking Henan 500kV substation medium voltage side bus (220kV) as an example
It is as follows:
(1) 8 branches (branch 1- branch 8) and 2 main transformer (main transformer 1- real-time data analysis: are connected on the bus
Main transformer 2), it is found by each branch SCADA measured data of comparison synchronization, Data of State Estimation and opposite end track data,
The SCADA measuring value of branch 4 is relatively low compared with other data more than 20MW, therefore branch 4 is positioned as defect route, when listing 3
The comparison of 4 related data of branch is carved, is shown in Table 2.Find that route SCADA in part measures active refreshing slowly in observation, it is existing more than 10 seconds
Field, which need to further be checked in clock apparatus and measure and control device variation, send parameter setting.
Table 2
(2) historical data analysis: entering electric energy metering device, selects bus out-of-limit serious one day uneven, checks each
Branch ins and outs difference electricity and power integral, are shown in Table 3, it is seen that 4 error of branch reaches 28.9%, is positioned as defect route.
Table 3
(3) defect elimination is handled: being found through site inspection, the A phase voltage of branch 4 is shown as 0 in system, and measure and control device end
Normal, the terminal block failure of the further investigation discovery analog input, the Resolving probiems after being replaced are measured, branch 4 has
Function is back to normal therewith.Scene is it has also been found that GPS, telemechanical apparatus and measure and control device clock are asynchronous, by telemechanical apparatus and GPS pairs
When, measure and control device and telemechanical apparatus clock synchronization latter three are unified.In addition, by branch 1- branch 8, the chugging threshold of main transformer 1,2
It is adjusted by 1% to minimum value 0.25%, send the period to be adjusted by 15 seconds to minimum value 10 seconds in circulation.
Through above-mentioned processing, the SCADA measurement of branch 4 has work value with its state estimation and becomes to the realization of end line value is synchronous
Change, electric flux power integral data restore normal, and each active refreshing of route real-time measurement becomes faster, and the active imbalance problem of bus obtains
To solution, its active uneven curve of the processing same day is shown in Fig. 2, it is seen that the active amount of unbalance of bus controls substantially after defect elimination processing
In claimed range (in Fig. 2 shown in straight line, 10MW), achieve noticeable achievement.
The active uneven quick positioning system embodiment of bus:
The application also provides a kind of bus active uneven quick positioning system, comprising:
Busbar voltage confirmation module, for confirming the voltage class of uneven bus；
Defect location module, for positioning defect route, it may be assumed that for 500V voltage class according to different voltages grade
Bus determines defect route by comparing the real-time active data of each branch SCADA and the real-time active data of WAMS；For
220V voltage class, then by the SCADA measuring value of each branch respectively with Data of State Estimation, to the real-time active data of end line
It compares, determines defect route；
Defect elimination module, for carrying out defect elimination processing to defect route.The defect route oriented is subjected to specific aim analysis
With defect elimination processing, emphasis, which is checked in field measurement device accuracy, chugging threshold and circulation, send period facilities, telemechanical
Machine clock, the preposition operating condition of link state and main website.
The specific implementation process of the present embodiment positioning system is identical as above-mentioned localization method embodiment.
It is enlightenment with the above-mentioned desirable embodiment according to the application, through the above description, relevant staff is complete
Full various changes and amendments can be carried out in the range of without departing from this item application technical idea.The technology of this item application
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of active uneven method for rapidly positioning of bus based on multi-source data, which is characterized in that the quick positioning side
Method includes the following steps:
Step 1, the voltage class of uneven bus is determined；
Step 2, if uneven bus is 500kV voltage class, by the SCADA of each branch of bus connection active data in real time
It is compared with the real-time active data of WAMS, if the error of two kinds of data is greater than setting error, it is determined that this route is scarce
Route is fallen into, and defect elimination processing is carried out to this route；Otherwise, then determine that the route is normal；
Step 3, if uneven bus is 220kV voltage class, by the SCADA measuring value of each branch of bus connection respectively with
Data of State Estimation compares the real-time active data of end line, if the error of data is greater than given threshold, it is determined that should
Branch is defect route, and carries out defect elimination processing to this branch；Otherwise, then determine that this branch is normal.
2. the active uneven method for rapidly positioning of bus according to claim 1, which is characterized in that in step 2, according to
The historical data of 500kV voltage class bus, selects the bus uneven out-of-limit serious period, and sampling 500kV voltage class is female
The active data of the corresponding SCADA history of each branch and the active data of WAMS history connected on line, and the SCADA of sampling is gone through
The active data of history and the active data of WAMS history compare, if two kinds of data errors are greater than setting error, it is determined that this branch
Road is defect route, and carries out defect elimination processing to this branch；Otherwise, then determine that this branch is normal.
3. the active uneven method for rapidly positioning of bus according to claim 1, which is characterized in that in step 3, according to
The historical data of 220kV voltage class bus selects the bus uneven out-of-limit serious period, samples each branch ins and outs difference electricity
And this branch is positioned as defect route if error amount is greater than the set value by power integral, both comparisons error；Otherwise, really
Fixed this branch is normal.
4. the active uneven method for rapidly positioning of bus according to claim 3, which is characterized in that the ins and outs difference electricity
By standing, end electric energy metering device surveys to obtain, and the power integral leads to SCADA measurement power calculation by main website and obtains.
5. the active uneven method for rapidly positioning of bus according to claim 2, which is characterized in that the historical data of sampling
Period less than 1 hour.
6. the active uneven method for rapidly positioning of bus according to claim 1, which is characterized in that the defect that will be oriented
Route carries out specific aim analysis and handles with defect elimination, and emphasis is checked in field measurement device accuracy, chugging threshold and circulation
Send period facilities, telecontrol device clock, the preposition operating condition of link state and main website.
7. the active uneven method for rapidly positioning of bus according to claim 2, which is characterized in that in step 2, setting is missed
Difference is 5MW.
8. the active uneven method for rapidly positioning of bus according to claim 1, which is characterized in that in step 3, set threshold
Value is 3 MW.
9. the active uneven method for rapidly positioning of bus according to claim 3, which is characterized in that setting value 5%.
10. a kind of active uneven quick positioning system of bus using localization method as described in claim 1, comprising:
Busbar voltage confirmation module, for confirming the voltage class of uneven bus；
Defect location module, for positioning defect route according to different voltages grade, it may be assumed that for the bus of 500V voltage class,
By comparing the real-time active data of each branch SCADA and the real-time active data of WAMS, defect route is determined；For 220V electricity
Grade is pressed, then is carried out the SCADA measuring value of each branch pair with Data of State Estimation, to the real-time active data of end line respectively
Than determining defect route；
Defect elimination module, for carrying out defect elimination processing to defect route.
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Cited By (4)
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| CN111198891A (en) * | 2019-12-05 | 2020-05-26 | 国网甘肃省电力公司电力科学研究院 | Data source fusion method, electronic device and non-transitory computer readable storage medium |
| CN111913148A (en) * | 2020-06-05 | 2020-11-10 | 国网山西省电力公司 | Method for positioning and metering abnormal three-phase electric energy meter based on digital-analog comparison method |
| CN112510654A (en) * | 2020-11-20 | 2021-03-16 | 山东山大电力技术股份有限公司 | Bus fault diagnosis method, system, readable medium and equipment |
| CN112952844A (en) * | 2021-05-14 | 2021-06-11 | 国网浙江省电力有限公司金华供电公司 | Load adjusting method under power grid out-of-limit working condition |
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