CN106771852A - A kind of online monitoring data unification collection of net source and analysis and processing method - Google Patents
A kind of online monitoring data unification collection of net source and analysis and processing method Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of net source online monitoring data unification collection and analysis and processing method and system.The present invention comprises the following steps：Generator excited system online monitoring data is gathered by substation excitation harvester, Generator Governor online monitoring data is gathered by substation speed governing harvester；Substation communication device collects generator excited system and governing system online monitoring data, while generating the off-line data under grid disturbance；Generator excited system and governing system online monitoring data and off-line data are given net source and monitor main station system on-line by substation communication device by IEC103 and IEEE1344 stipulations on simultaneously；Described net source on-line monitoring main station system united analysis treatment on-line monitoring dynamic real time data and off-line data, realizes net source on-line monitoring on-line analysis and afterwards off-line analysis.The present invention greatly improves the level being monitored to power grid security, stable operation with assessment.
Description
Technical field
The present invention relates to the Data acquisition and issuance process field of power system net source device, particularly a kind of net source device
The offline and online unified collection of online monitoring data and analysis and processing method.
Background technology
The development of electric power is closely related with national economy, it is ensured that the safety of large-scale power grid has to notional economic stability operation
Very important influence.Large-scale power grid is typically made up of the generating set of some paired runnings, generating set and operation of power networks
Security influenced each other with control performance, mutually restricted, and generator excited system and governing system be contact generating set
With the most important tie of power network.
The characteristic that generating set is showed both with governing system and excitation system the characteristics of, control mode, parameter set
Pass is equipped with, design feature also with unit itself, Type of equipment, operational factor are relevant.The each excitation system of generating set
Can be described using a series of Mathematical Modeling with governing system, in each Mathematical Modeling, there are several special
Parameter is levied to show its feature.
Generator excited system and governing system as the stabilization of power grids important adjustment equipment, it is ensured that generating set is to power network
Stabilization, quick, economic power supply are provided.Governing system and excitation system relate to net equipment as important, are net source coordination management
Important object, the Mathematical Modeling and characterisitic parameter for accurately grasping each grid-connected DCgenerator motor field system and governing system are to relate to net
The important component of parameter management, is also to build one of strong, intelligent grid basic work, is net source coordination management
Important composition.
At present, management of the power network to generator excited system and governing system is mainly tested and technical supervision hand by relating to net
Section, excitation system and governing system mainly measure hand to power network change dynamic response performance by off-line calculation and field test
Section, shortage continue to monitor, online tracking and online evaluation means and technology, so as to certain DCgenerator motor field system cannot be judged online
The abnormality of system and governing system, it is impossible to the which whether damping property that online evaluation excitation system is provided in power network vibration (carries
For effective positive damping), also cannot online judge the correctness of excitation limitation function action, the prevention of influence electric network fault and failure
The real-time of response, so reinforcement generator excitation system and governing system parameter and variable real-time management, dynamic response exist
Line judges imperative, and it is exactly most effective approach to monitor on-line and assess.
The content of the invention
To solve the problems, such as above-mentioned prior art, the present invention combines the actual conditions and pipe in grid company and power plant
Reason is required, there is provided a kind of offline and online unified collection of net source online monitoring data and analysis and processing method are set realizing net source
Standby online monitoring data is offline and is uniformly processed online, and evaluated off-line (ex-post analysis) and Real-Time Evaluation (analysis in progress) are combined
And unification, so as to greatly improve the level being monitored to power grid security, stable operation with assessment.
The technical solution adopted by the present invention is：A kind of online monitoring data unification collection of net source and analysis and processing method, its
Comprise the following steps：
Generator excited system online monitoring data is gathered by substation excitation harvester, is gathered by substation speed governing and filled
Put collection Generator Governor online monitoring data；
Substation communication device collects generator excited system and governing system online monitoring data, while generating grid disturbance
Under off-line data；
Substation communication device is supervised generator excited system and governing system by IEC103 and the stipulations of IEEE 1344 online
Survey data and off-line data gives net source on-line monitoring main station system on simultaneously；
Described net source on-line monitoring main station system united analysis treatment on-line monitoring dynamic real time data and off-line data,
Realize net source on-line monitoring on-line analysis and afterwards off-line analysis.
Important to generator net equipment governing system is related to the invention provides a kind of and excitation system is continued to monitor, divided offline
Analysis and the means and technology of online tracking and online evaluation.
Further, the system busbar that described substation excitation harvester is exported with the default sampling period to sensor
Voltage, set end voltage and generator terminal electric current, excitation voltage and exciting current are sampled, and obtain the instantaneous value of above-mentioned each analog quantity；
Substation excitation harvester is based on the important electrical quantity of above-mentioned instantaneous value computational representation generating set running status, including：System
Voltage effective value Usys, set end voltage virtual value Ug, stator current virtual value Ig, unit active-power P, unit reactive power Q,
Set end voltage frequency fg, system busbar electric voltage frequency fsys, Power Factor cosa, excitation voltage Ufd and exciting current
Ifd；
Control voltage value uk that substation excitation harvester is exported to DCgenerator motor field system, power system stabilizer are defeated
Go out value Upss and stator voltage reference value Uref is sampled, obtain the important controlled quentity controlled variable of excitation system；
Automatic/hand run switch amount that substation excitation harvester is exported to excitation system, PSS put into/exit switch
Amount, excitation put into/exit switching value, principal and subordinate's regulation channel status amount, degaussing switch location status amount, grid-connected position of the switch state
Amount, excitation are crossed and encourage restriction state amount and the low restriction state amount of encouraging of excitation is sampled, and obtain reflecting excitation system running status
Switching value, i.e. excitation system quantity of state；
Substation excitation harvester using the important electrical quantity of above-mentioned unit, the important controlled quentity controlled variable of excitation system and quantity of state as
Online monitoring data, is transmitted through the fiber to substation communication device.
Further, the sampling period meets has identical sampling number in a cycle of set end voltage.
Further, the important mould that described substation speed governing harvester is exported with the default sampling period to governing system
Analog quantity is sampled, including turbine speed is poor, the power of the assembling unit, stop-valve pressure, first stage pressure and valve bit instruction, obtains
The analog quantity instantaneous value of reflection governing system state is stated, and average value is calculated based on above-mentioned instantaneous value；Substation speed governing harvester
Switching value is put into/exit to the primary frequency modulation that governing system is exported to sample, obtain reflecting governing system primary frequency modulation state
Switching value, i.e. governing system quantity of state；
Substation speed governing harvester using above-mentioned Simulating Governing System amount and quantity of state as online monitoring data, by light
Fibre is transmitted to substation communication device.
Further, the control electricity by being exported to system busbar voltage, set end voltage, rotor voltage and excitation system
Pressure carries out differential derived function respectively, while carrying out amplitude detection, comprhensive deterministic system disturbance to the PSS values of excitation system output
A situation arises, judges that calculating formula is as follows：
Upss ＞ Tth, formula 5
It is above-mentioned it is various in, △ T for real-time detection a time period, starting and stop the moment be respectively t2And t1, i.e. △ T
=t2-t1；Us1And Us2Respectively t1With t2The system busbar voltage calculated value at moment；Ug1And Ug2Respectively t1With t2The machine at moment
Terminal voltage calculated value；Uf1And Uf2Respectively t1With t2The rotor voltage calculated value at moment；Uk1And Uk2Respectively t1With t2Moment
Control voltage calculated value；Ks、Kg、Kf、KkThe respectively rate of change of system voltage, set end voltage, rotor voltage and control voltage
Threshold values, Tth is the detection threshold of excitation system output；
Above-mentioned grid disturbance evaluation algorithm judges that the condition that system disturbance occurs is：Formula 1 or formula 2 are set up and 4 one-tenth of formula 3 or formula
It is vertical；Or formula 5 is individually set up.
Further, described substation communication device is transmitted online monitoring data and off-line data by dispatch data net
Giving net source on-line monitoring main station system, net source on-line monitoring main station system carries out data acquisition and storage treatment；
Substation communication device sets up a communication channel of IEC 103, upper power transmission by monitoring main station system on-line with net source
Net fault disturbance wave file, that is, record the file of off-line data, and wave file is using IEEE Comtrade forms and per second
100 frame data sampling frequency, the electric network data before wave file record grid disturbance event occurs and after generation in a period of time
Information, including active, idle, voltage, electric current and frequency data；Surrounding time section time value can manually be set, and unit is accurate
To the second, default settings are that electric network fault disturbance occurs first 10 seconds and rear 10 seconds power networks and the generator operation data at moment；
Meanwhile, substation communication device sets up an IEEE1344 communication channel by monitoring main station system on-line with net source,
On send on-line monitoring dynamic real time data, according to boss stand bandwidth chahnel actual conditions, using 25 frame per second, 50 frames or 100
Sent in frame mode.
Further, when on-line monitoring main station system in net source carries out data acquisition and storage treatment, when excitation, governing system
Break down, or power network is when disturbing, substation communication device actively on send off-line data, or net source on-line monitoring main station system
Calling of artificial or cycle off-line data, deposits in relationship type or file based database application system, makees long-term preservation, for afterwards
Make perturbation analysis treatment；Net source on-line monitoring main station system possesses manual termination and starts calling function and provide the failure of specialty
Analysis instrument, can analyze and show waveform and the export situation of related device about electrical quantity in failure process；
Monitor main station system Real-time Collection and storage treatment on-line monitoring real-time dynamic data on-line and will move in real time in net source
State data are submitted to store in time series database successively, make long-term preservation, are used with analysis in real time for on-line monitoring application query.
Further, net source on-line monitoring main station system united analysis treatment on-line monitoring real-time dynamic data and offline number
According to when, by the offline waveform query facility of main website, select random time section, calling and inquiry this period in grid disturbance ripple
Shape list of thing, each disturbance event one wave file of correspondence, automatic triggering net source exists after clicking on a certain selected disturbance event
Line monitors off-line analysis program, carries out the net source device on-line monitoring evaluation analysis involved by this grid disturbance event, evaluates
Analysis result deposit in net source on-line monitoring real-time database off-line analysis result table in, analyzing and processing terminate after net source monitor on-line from
Line analysis program is out of service；
Meanwhile, the net source of net source on-line monitoring main station system monitors real-time analysis program on-line as backstage Resident Process,
Access mode is moved after being rolled using window, every 1 second cycle obtains net source device service data from time series database, use first
Grid disturbance evaluation algorithm carries out grid disturbance judgement, if it is judged that power network occurs disturbance then carries out on-line monitoring Real-Time Evaluation
Analysis, evaluation analysis result is deposited in the on-line monitoring real-time database on-line analysis result table of net source.
Further, described net source on-line monitoring off-line analysis and on-line analysis, its analysis indexes include excitation system
Performance indications and the major class of governing system performance indications two.
Further, described excitation system performance indications include：Field-forcing voltage multiple, strong encourage electric current multiple and continue
Time, the gain of excitation system transient state, exciting votage responding time, excitation system time delay, excitation system nominal response, disturbance
When set end voltage time domain performance, active vibration time-domain response criterion, PSS output and active phase difference；
Described governing system performance indications include：Primary frequency modulation response lag time, primary frequency modulation stabilization time, once
Frequency modulation theory contribution electricity, primary frequency modulation actual contribution electricity, primary frequency modulation effectiveness indicator, unit participate in the adjustment of primary frequency modulation
Amplitude, the governing system actual speed rate of change, primary frequency modulation 15s, 30s, 45s, 60s responsiveness, Primary frequency control ability are estimated.
The device have the advantages that as follows：1) specification net source on-line monitoring boss station data acquisition process mode and
Boss station communication modes, the promotion and application for being easy to this to invent；2) consider grid company and electricity power enterprise actual conditions and
Management requires, it is offline and be uniformly processed online to realize net source device online monitoring data, evaluated off-line (ex-post analysis) and
Line Real-Time Evaluation (analysis in progress) is combined and unifies；3) for further raising power grid security, stable operation are monitored with
Assessment is laid a good foundation.
Brief description of the drawings
Fig. 1 is schematic diagram of the invention.
Specific embodiment
Below with reference to Figure of description, technical scheme is described in detail.
It is of the invention to comprise the following steps that：
1) substation excitation harvester collection generator excitation online monitoring data.
Substation excitation harvester is by PT, CT and sensor with the default sampling period to system busbar voltage, machine
Terminal voltage and generator terminal electric current, excitation voltage and exciting current are sampled, and obtain the instantaneous value of above-mentioned each analog quantity；System busbar
Voltage and set end voltage access excitation harvester by different PT transformers, and generator terminal electric current accesses excitation by CT transformers
Harvester.
Based on the important electrical quantity of above-mentioned sampled instantaneous value computational representation generating set running status, including：System voltage
Virtual value Usys, set end voltage virtual value Ug, stator current virtual value Ig, unit active-power P, unit reactive power Q, generator terminal
Electric voltage frequency fg, system busbar electric voltage frequency fsys, Power Factor cosa, excitation voltage Ufd and exciting current Ifd.
Substation excitation harvester receive the sign internal control quantity of excitation control system output 4-20mA or 0-5V or
0-10V signals, including control voltage value uk, power system stabilizer output valve Upss, stator voltage reference value Uref；It is right
Above-mentioned each control analog quantity sample and obtains the instantaneous value of each analog quantity；
Substation excitation harvester accesses the hard contact of sign excitation system automatic/hand run switch amount, PSS and puts into/move back
Go out the hard contact of switching value, excitation and put into/exit the hard contact of switching value, the hard contact of principal and subordinate's regulation channel status amount, degaussing switch position
The hard contact of configuration state amount, the grid-connected hard contact of position of the switch quantity of state, excitation are crossed and encourage that the hard contact of restriction state amount, excitation are low to encourage limitation
The hard contact of quantity of state, obtains reflecting the switching value of excitation system running status.Substation excitation harvester also can by with excitation
The communication (such as RS485 serial ports, optical fiber or network interface) of regulating system obtains the above-mentioned quantity of state of excitation system.
2) substation speed governing harvester collection generator speed governing online monitoring data.
Speed governing harvester in substation receives the 4-20mA or 0- of the sign speed regulating control analog quantity of unit governing system output
5V or 0-10V signals, are sampled with the default sampling period.Collection capacity includes poor turbine speed, the power of the assembling unit, main inlet throttle-stop valve
Pressure, first stage pressure, valve bit instruction, obtain the analog quantity instantaneous value of above-mentioned reflection governing system state, and are adopted based on above-mentioned
Sample value calculates average value；
The primary frequency modulation that speed governing harvester in substation accesses sign governing system output puts into/exits the hard contact of switching value,
Obtain reflecting the switching value of governing system primary frequency modulation state.Substation speed governing acquisition means also can be by logical with set speed adjustment system
News (such as RS485 serial ports) obtain the above-mentioned quantity of state of governing system.
3) substation communication manager is exported by system busbar voltage, set end voltage, rotor voltage and adjustment of field excitation
Control voltage carries out differential derived function respectively, while carrying out amplitude detection, comprehensive descision system to the PSS values of adjustment of field excitation output
System disturbance occurs, and generates recorded wave file.
Substation communication manager is controlled by being exported to system busbar voltage, set end voltage, rotor voltage and adjustment of field excitation
Voltage processed carries out differential derived function respectively, while carrying out amplitude detection, comprhensive deterministic system to the PSS values of adjustment of field excitation output
Disturbance occurs.Judge that calculating formula is as follows：
Upss ＞ Tth formulas 5
Judge that disturbance occurrence condition is：Formula 1 or formula 2 are set up and formula 3 or formula 4 are set up；Or formula 5 is set up.Above-mentioned condition meets
Then judge that system is disturbed.
Wherein：△ T are a time period of real-time detection, and starting and termination moment are respectively t2And t1, i.e. △ T=t2-
t1。Us1And Us2Respectively t1With t2The system voltage calculated value at moment；Ug1 and Ug2 are respectively t1With t2The set end voltage meter at moment
Calculation value；Uf1And Uf2Respectively t1With t2The rotor voltage calculated value at moment；Uk1And Uk2Respectively t1With t2The regulation control at moment
Voltage calculated value.Ks、Kg、Kf、KkRespectively system voltage, set end voltage, rotor voltage and regulation control voltage rate of change
Threshold values, Tth is the detection threshold of adjustment of field excitation output.
For example presetting real-time detection time period △ T can be set to 100ms, and communication manager is using the Current interrupt moment as t2When
Carve, using (t2-100ms) as t1Moment.Communication manager calculates system voltage, set end voltage, the rotor in time period △ T
The differential rate of change of voltage, control voltage.Judge the PSS values Upss of adjustment of field excitation output whether more than detection threshold simultaneously.When
Formula 1 or formula 2 are set up and formula 3 or formula 4 are set up；Or formula 5 is set up.Above-mentioned condition meets and then judges that system is disturbed.
When system disturbance generation, set system disturbance mark is judged, while generating disturbance waveform file.Recorded wave file is recorded
There is the online monitoring data of first 5 seconds and latter 25 seconds in disturbance, all simulations of host computer communication are sent to comprising above-mentioned collecting unit
Amount and quantity of state, record the operating states of the units of disturbance generating process comprehensively.If disturbance waveform file has new bar during being formed
Part triggering record ripple, then delay from triggering moment and continue within 10 seconds to record Monitoring Data.
Substation communication device sets up pushing electric network fault disturbance wave file on a communication channel of IEC 103 by with main website
(off-line data), wave file is using IEEE Comtrade forms and 100 frame data per second sampling frequency, wave file record
Electric network data information before grid disturbance event occurs and after occurring in a period of time, including active, idle, voltage, electric current,
The data such as frequency, surrounding time section time value can manually be set, and unit is accurate to the second, and default settings are electric network fault disturbances
There are first 10 seconds and rear 10 seconds power networks and the generator operation data at moment；
Meanwhile, substation communication device send net source on-line monitoring dynamic by being set up on an IEEE1344 communication channel with main website
State real time data, according to boss station bandwidth chahnel actual conditions, can use and be sent in 25 frame per second, 50 frames or 100 frame modes
On-line monitoring dynamic real time data.
4) main station system carries out offline net source on-line monitoring and dynamic data unification collection and storage treatment.
Main station system net source 103scada programs and 1344scada programs are Resident Process, are responsible for off-line data and online
The collection and treatment of real time data.
NR》103scada program descriptions
103scada programs are interacted by way of shared drive pipeline with the conventions data acquisition module of network 103, treatment
103 network messages, and network message is parsed into the data that different type is of practical significance.
Basic function is as follows：
A) the data summarization treatment that will be obtained, including the calculating of engineering value, validity check, detection shape are carried out to metric data
State amount changes and starts corresponding processing procedure etc..
B) each host computer communication warning information can be classified and is preserved, energy analytic parameter value data possesses and recorder data is entered
The function of row Data Format Transform.
C) possess magnanimity information processing mechanism, when occurrence of large-area systematic failures, should be able to accurately and rapidly receive simultaneously
On a large amount of fault messages for sending, it is impossible to cause information occlusion and cause information to be lost, it is ensured that system will not collapse, crash.
When excitation, speed governing are broken down, or power network, when disturbing, 103scada programs are responsible for substation communication device actively
On be sent from the collection and treatment of line recorder data, main station system can also manually or the cycle calls offline recorder data, offline
During wave file deposits in relationship type or deposits in file based database application system by SQL commercialization bank interfaces, make it is long-term preserve,
For making perturbation analysis treatment afterwards.Main station system possesses manual termination and starts calling function and provide the failure wave-recording point of specialty
Analysis instrument, can analyze and show waveform and the export situation of related device about electrical quantity in failure process.
NR》1344scada program descriptions
1344scada programs are based on on-line monitoring dynamic data, the real-time dynamic monitoring to unit are realized, to unit operation
The real-time monitorings such as mode, working condition, state parameter and alarm, situation of change is reflected to key index in forms such as charts, is allowed
User can see the situation of change of multidate information, understand unit current operating conditions.
Dynamic Data Processing module mainly includes following function：
A) Dynamic Data Acquiring, storage and transportation load monitoring
B) operating states of the units monitoring
C) voltage course monitoring and early warning
D) frequecy characteristic analysis and out-of-limit early warning
1344scada Real-time Collections and treatment net source are monitored real-time dynamic data on-line and carry real-time dynamic data successively
Deposit and store up in time series database, make long-term preservation, used with analysis in real time for on-line monitoring application query.
5) main station system alarming processing：Main station system can call the alerting service that software platform is provided.Alerting service is entered
Journey is a Resident Process, after it receives the warning message that each application sends, just obtains phase according to its alarm type
The alarm behavior answered, then finds the alarm action that this behavior is included in alarm behavior definition, and most latecomer message gives every
Alarm client on machine.Alarm can according to being divided into different types the need for difference, alarm type can be divided into the common event,
Fault actions, failure wave-recording, operation note etc..Various alarm means are provided, including the prompting of Real-time Alarm window, film flicker are accused
Alert, accident pushes away picture, audio alert, audible alarm etc..User can select different alarm types pair by alerting definition interfaces
The alarm behavior answered and alarm mode.
Alarm event type includes：
● excitation AVR failure classes events
● excitation AVR alerts class event
● the restricted events of excitation AVR
● excitation AVR running statuses
● governing system running status
● monitoring system abnormal information
6) main website carries out net source on-line monitoring offline and dynamic unity analyzing and processing：
Main website off-line analysis calls the offline waveform of main website to inquire about man-machine instrument, can select random time section, calls and looks into
The grid disturbance waveform list of thing within this period is ask, each disturbance event one offline wave file of correspondence clicks on certain
Automatic triggering net source on-line monitoring off-line analysis program, is carried out involved by this grid disturbance event after one selected disturbance event
Net source device monitors evaluation analysis on-line, and evaluation analysis result deposits in net source on-line monitoring real-time database off-line analysis result table
In, analyzing and processing nets source on-line monitoring off-line analysis program after terminating out of service.
Meanwhile, main station system net source monitors real-time analysis program on-line as backstage Resident Process, after being rolled using window
Access mode is moved, every 1 second cycle obtains net source device service data from time series database, first using described in formula 1-5
Grid disturbance evaluation algorithm carries out grid disturbance judgement, if it is judged that power network occurs disturbance then carries out on-line monitoring Real-Time Evaluation
Analysis, evaluation analysis result is deposited in the on-line monitoring real-time database on-line analysis result table of net source.
Net source monitors off-line analysis and on-line analysis on-line, and its analysis indexes includes excitation system performance indications and speed governing system
The system major class of performance indications two.Excitation system performance indications include：Field-forcing voltage multiple, encourage electric current multiple and duration, encourage by force
The machine when gain of magnetic system transient state, exciting votage responding time, excitation system time delay, excitation system nominal response, disturbance
Terminal voltage time domain performance, active vibration time-domain response criterion, PSS outputs are with active phase difference etc..Governing system performance indications bag
Include：Primary frequency modulation response lag time, primary frequency modulation stabilization time, primary frequency modulation theory contribution electricity, the actual tribute of primary frequency modulation
Offer adjustment amplitude, the governing system actual speed rate of change, one that electricity, primary frequency modulation effectiveness indicator, unit participate in primary frequency modulation
Secondary frequency modulation 15s, 30s, 45s, 60s responsiveness, Primary frequency control ability are estimated.
The result of analysis can be shown by number of ways：
● two-dimensional table, block diagram, pie chart, rod figure, plant stand line chart
● curve mode
● analysis bulletin mode
● form mode
Above example is only explanation technological thought of the invention, it is impossible to limit protection scope of the present invention with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within the scope of the present invention
Within.
Claims (10)
1. a kind of net source online monitoring data unification is gathered and analysis and processing method, and it comprises the following steps：
Generator excited system online monitoring data is gathered by substation excitation harvester, is adopted by substation speed governing harvester
Collection Generator Governor online monitoring data；
Substation communication device collects generator excited system and governing system online monitoring data, while generating under grid disturbance
Off-line data；
Substation communication device monitors generator excited system and governing system on-line number by IEC103 and the stipulations of IEEE 1344
Net source on-line monitoring main station system is given on simultaneously according to off-line data；
Described net source on-line monitoring main station system united analysis treatment on-line monitoring dynamic real time data and off-line data, realizes
Monitor on-line analysis and afterwards off-line analysis on-line in net source.
2. net source according to claim 1 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
System busbar voltage, set end voltage that described substation excitation harvester is exported with the default sampling period to sensor
Sampled with generator terminal electric current, excitation voltage and exciting current, obtained the instantaneous value of above-mentioned each analog quantity；Substation excitation collection dress
The important electrical quantity based on above-mentioned instantaneous value computational representation generating set running status is put, including：System voltage virtual value Usys,
Set end voltage virtual value Ug, stator current virtual value Ig, unit active-power P, unit reactive power Q, set end voltage frequency fg,
System busbar electric voltage frequency fsys, Power Factor cosa, excitation voltage Ufd and exciting current Ifd；
Control voltage value uk, power system stabilizer output valve that substation excitation harvester is exported to DCgenerator motor field system
Upss and stator voltage reference value Uref are sampled, and obtain the important controlled quentity controlled variable of excitation system；
Automatic/hand run switch amount that substation excitation harvester is exported to excitation system, PSS put into/exit switching value, encourage
Magnetic puts into/exits switching value, principal and subordinate's regulation channel status amount, degaussing switch location status amount, grid-connected position of the switch quantity of state, encourages
Magnetic is crossed and encourages restriction state amount and the low restriction state amount of encouraging of excitation is sampled, and obtains reflecting the switch of excitation system running status
Amount, i.e. excitation system quantity of state；
Substation excitation harvester is using the important electrical quantity of above-mentioned unit, the important controlled quentity controlled variable of excitation system and quantity of state as online
Monitoring Data, is transmitted through the fiber to substation communication device.
3. net source according to claim 2 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：Institute
State sampling period satisfaction has identical sampling number in a cycle of set end voltage.
4. net source according to claim 2 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
Described substation speed governing harvester is sampled with the default sampling period to the important analog quantity that governing system is exported,
Including turbine speed is poor, the power of the assembling unit, stop-valve pressure, first stage pressure and valve bit instruction, obtain above-mentioned reflection speed governing system
The analog quantity instantaneous value of system state, and average value is calculated based on above-mentioned instantaneous value；Substation speed governing harvester is defeated to governing system
The primary frequency modulation for going out puts into/exits switching value and sampled, and obtains reflecting the switching value of governing system primary frequency modulation state, that is, adjust
Speed system quantity of state；
Speed governing harvester in substation passes above-mentioned Simulating Governing System amount and quantity of state as online monitoring data by optical fiber
Transport to substation communication device.
5. net source according to claim 4 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
Carried out respectively by the control voltage exported to system busbar voltage, set end voltage, rotor voltage and excitation system micro-
Divide derived function, while carrying out amplitude detection to the PSS values of excitation system output, a situation arises for comprhensive deterministic system disturbance, sentences
Disconnected calculating formula is as follows：
Upss ＞ Tth, formula 5
It is above-mentioned it is various in, △ T for real-time detection a time period, starting and stop the moment be respectively t2And t1, i.e. △ T=t2-
t1；Us1And Us2Respectively t1With t2The system busbar voltage calculated value at moment；Ug1And Ug2Respectively t1With t2The generator terminal electricity at moment
Pressure calculated value；Uf1And Uf2Respectively t1With t2The rotor voltage calculated value at moment；Uk1And Uk2Respectively t1With t2The control at moment
Voltage calculated value；Ks、Kg、Kf、KkThe respectively rate of change valve of system voltage, set end voltage, rotor voltage and control voltage
Value, Tth is the detection threshold of excitation system output；
Above-mentioned grid disturbance evaluation algorithm judges that the condition that system disturbance occurs is：Formula 1 or formula 2 are set up and formula 3 or formula 4 are set up；
Or formula 5 is individually set up.
6. net source according to claim 5 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
Online monitoring data and off-line data are transferred to net source and supervised online by described substation communication device by dispatch data net
Main station system is surveyed, net source on-line monitoring main station system carries out data acquisition and storage treatment；
Substation communication device sets up a communication channel of IEC 103, upper pushing electric network event by monitoring main station system on-line with net source
Barrier disturbance waveform file, that is, record the file of off-line data, and wave file uses IEEE Comtrade forms and 100 frame per second
Data sampling frequency, the electric network data information before wave file record grid disturbance event occurs and after generation in a period of time,
Including active, idle, voltage, electric current and frequency data；
Meanwhile, substation communication device sets up an IEEE1344 communication channel by monitoring main station system on-line with net source, above send
On-line monitoring dynamic real time data, according to boss station bandwidth chahnel actual conditions, using 25 frame per second, 50 frames or 100 frame sides
Sent in formula.
7. net source according to claim 6 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：Net
When source on-line monitoring main station system carries out data acquisition and storage treatment,
When excitation, governing system break down, or power network is when disturbing, substation communication device actively on send off-line data, or
Net source on-line monitoring main station system is artificial or the cycle calls off-line data, deposits in relationship type or file based database application system
In, make long-term preservation, for making perturbation analysis treatment afterwards；Net source on-line monitoring main station system possesses manual termination and starts calls
Function simultaneously provides the unit faults recorder analysis instrument of specialty, can analyze and show in failure process the waveform of relevant electrical quantity and accordingly
The export situation of device；
Net source monitor on-line main station system Real-time Collection and treatment on-line monitoring real-time dynamic data and by real-time dynamic data according to
Secondary submission to is stored in time series database, makees long-term preservation, is used with analysis in real time for on-line monitoring application query.
8. net source according to claim 7 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：Net
During on-line monitoring main station system united analysis treatment on-line monitoring real-time dynamic data and the off-line data of source, by the offline ripple of main website
Shape query facility, selectes random time section, calling and the grid disturbance waveform list of thing inquired about in this period, each disturbance
Event one wave file of correspondence, clicks on automatic triggering net source on-line monitoring off-line analysis program after a certain selected disturbance event,
The net source device on-line monitoring evaluation analysis involved by this grid disturbance event is carried out, evaluation analysis result is deposited in net source and existed
In line monitoring real-time database off-line analysis result table, analyzing and processing nets source on-line monitoring off-line analysis program after terminating out of service；
Meanwhile, the net source of net source on-line monitoring main station system monitors real-time analysis program on-line as backstage Resident Process, uses
Window moves access mode after rolling, and every 1 second cycle obtains net source device service data from time series database, first using power network
Disturbance evaluation algorithm carries out grid disturbance judgement, if it is judged that power network occurs disturbance then carries out on-line monitoring Real-Time Evaluation point
Analysis, evaluation analysis result is deposited in the on-line monitoring real-time database on-line analysis result table of net source.
9. net source according to claim 8 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
Described net source on-line monitoring off-line analysis and on-line analysis, its analysis indexes include excitation system performance indications and speed governing
The major class of system performance index two.
10. net source according to claim 9 online monitoring data unification is gathered and analysis and processing method, it is characterised in that：
Described excitation system performance indications include：Field-forcing voltage multiple, strong electric current multiple and duration, the excitation system of encouraging are temporary
State gain, exciting votage responding time, excitation system time delay, excitation system nominal response, disturbance when set end voltage when
Domain performance, active vibration time-domain response criterion, PSS outputs and active phase difference；
Described governing system performance indications include：Primary frequency modulation response lag time, primary frequency modulation stabilization time, primary frequency modulation
Theory contribution electricity, primary frequency modulation actual contribution electricity, primary frequency modulation effectiveness indicator, unit participate in the adjustment width of primary frequency modulation
Degree, the governing system actual speed rate of change, primary frequency modulation 15s, 30s, 45s, 60s responsiveness, Primary frequency control ability are estimated.
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| CN108132660A (en) * | 2018-01-05 | 2018-06-08 | 贵州电网有限责任公司电力调度控制中心 | A kind of speed governing harvester for generator on-line monitoring system |
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| CN111736545A (en) * | 2020-05-20 | 2020-10-02 | 国网河北省电力有限公司电力科学研究院 | System and method for data fusion, error correction and analysis of power supply unit |
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