CN106771852B - A kind of unified acquisition of net source online monitoring data and analysis and processing method - Google Patents
A kind of unified acquisition of net source online monitoring data 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 unified acquisition of net source online monitoring data and analysis and processing method and systems.The present invention includes the following steps: to acquire generator excited system online monitoring data by substation excitation acquisition device, adjusts the speed acquisition device by substation and acquire Generator Governor online monitoring data；Substation communication device collects generator excited system and speed-regulating system online monitoring data, while generating the off-line data under grid disturbance；Substation communication device gives generator excited system and speed-regulating system online monitoring data and off-line data to net source by IEC103 and IEEE1344 specification and monitors main station system on-line on simultaneously；The net source on-line monitoring main station system united analysis processing on-line monitoring dynamic real time data and off-line data, realize net source on-line monitoring on-line analysis and subsequent 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 collection and analysis process field of electric system net source device, especially a kind of net source device
Online monitoring data is offline and online unification acquires and analysis and processing method.
Background technique
The development of electric power and national economy are closely related, it is ensured that the safety of large-scale power grid has notional economic stability operation
Very important influence.Large-scale power grid is generally made of the generating set of several paired runnings, generating set and operation of power networks
Safety influence each other with control performance, mutually restrict, and generator excited system and speed-regulating system be connection generating set
With the most important tie of power grid.
The characteristic that generating set is showed both with speed-regulating system and excitation system the characteristics of, control mode, parameter set
It is equipped with pass, it is also related with the design feature of unit itself, Type of equipment, operating parameter.The excitation system of each generating set
A series of mathematical model can be used with speed-regulating system to be described, in each mathematical model, there are several spies
Parameter is levied to show its feature.
The important adjustment equipment of generator excited system and speed-regulating system as the stabilization of power grids guarantees generating set to power grid
The power supply stablized, quickly, economic is provided.Speed-regulating system and excitation system relate to net equipment as important, are net source coordination management
Important object, the mathematical model and characterisitic parameter for accurately grasping each grid-connected DCgenerator motor field system and speed-regulating system are to relate to net
One of important component of parameter management, and strong, smart grid the basic work of construction, are net source coordination management
Important composition.
Currently, power grid, which mainly passes through the management of generator excited system and speed-regulating system, relates to net test and technical supervision hand
Section, excitation system and speed-regulating system mainly pass through off-line calculation to power grid variation dynamic response performance and field test measures hand
Section, lack continue to monitor, online tracking and online evaluation means and technology, to can not judge certain DCgenerator motor field system online
The abnormality of system and speed-regulating system, can not online evaluation excitation system damping property for providing in power grid oscillation (whether mention
For effective positive damping), the correctness of excitation limitation function movement can not be also judged online, influence electric network fault prevention and failure
The real-time of response, so reinforcement generator excitation system and speed-regulating system parameter and variable real-time management, dynamic response exist
It is imperative that line judges, and monitoring on-line and assessing is exactly most effective approach.
Summary of the invention
To solve the above-mentioned problems of the prior art, the actual conditions and pipe of present invention combination grid company and power plant
Reason requires, and a kind of offline and online unified acquisition of net source online monitoring data and analysis and processing method is provided, to realize that net source is set
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) combine
Uniformly, to greatly improve the level being monitored to power grid security, stable operation with assessment.
The technical solution adopted by the present invention is that: a kind of unified acquisition of net source online monitoring data and analysis and processing method,
Include the following steps:
Generator excited system online monitoring data is acquired by substation excitation acquisition device, acquisition dress is adjusted the speed by substation
Set acquisition Generator Governor online monitoring data；
Substation communication device collects generator excited system and speed-regulating system online monitoring data, while generating grid disturbance
Under off-line data；
Substation communication device is supervised generator excited system and speed-regulating system by IEC103 and 1344 specification of IEEE online
Measured data and off-line data give net source on-line monitoring main station system on simultaneously；
The net source on-line monitoring main station system united analysis processing on-line monitoring dynamic real time data and off-line data,
Realize net source on-line monitoring on-line analysis and subsequent off-line analysis.
Net equipment speed-regulating system is related to and excitation system continues to monitor, divides offline the present invention provides a kind of pair of generator is important
The means and technology of analysis and online tracking and online evaluation.
Further, the system busbar that the substation excitation acquisition device exports sensor with the preset sampling period
Voltage, set end voltage and generator terminal electric current, excitation voltage and exciting current are sampled, and the instantaneous value of above-mentioned each analog quantity is obtained；
Important electrical quantity of the substation excitation acquisition device based on above-mentioned instantaneous value computational representation generating set operating status, comprising: 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, the power system stabilizer that substation excitation acquisition device exports DCgenerator motor field system are defeated
Value Upss and stator voltage reference value Uref are sampled out, obtain the important control amount of excitation system；
Automatic/hand run switch amount that substation excitation acquisition device exports excitation system, PSS put into/exit switch
Amount, excitation put into/exit switching value, principal and subordinate adjusts channel status amount, degaussing switch location status amount, grid-connected position of the switch state
Amount, excitation, which are crossed, encourages restriction state amount and the low restriction state amount of encouraging of excitation is sampled, and obtains reflection excitation system operating status
Switching value, i.e. excitation system quantity of state；
Substation excitation acquisition device using the important electrical quantity of above-mentioned unit, the important control amount 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 the sampling number having the same in a cycle of set end voltage.
Further, the important mould that speed regulation acquisition device in the substation exports speed-regulating system with the preset sampling period
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 speed-regulating system state is stated, and average value is calculated based on above-mentioned instantaneous value；Substation adjusts the speed acquisition device
Switching value is put into/exited to the primary frequency modulation of speed-regulating system output to sample, obtain reflection speed-regulating system primary frequency modulation state
Switching value, i.e. speed-regulating system quantity of state；
Substation adjusts the speed acquisition device using above-mentioned Simulating Governing System amount and quantity of state as online monitoring data, passes through 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 value of excitation system output
A situation arises, judges that calculating formula is as follows:
Upss > Tth, formula 5
In the above formulas, △ T is a period of real-time detection, and starting and suspension moment are 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
Hold voltage calculated value；Uf1And Uf2Respectively t1With t2The rotor voltage calculated value at moment；Uk1And Uk2Respectively t1With t2Moment
Control voltage calculated value；Ks、Kg、Kf、KkRespectively system voltage, set end voltage, rotor voltage and the change rate for controlling voltage
Threshold values, Tth are the detection threshold of excitation system output；
Above-mentioned grid disturbance judges the condition that algorithm judges that system disturbance occurs are as follows: formula 1 or formula 2 set up and formula 3 or formula 4 at
It is vertical；Or formula 5 is individually set up.
Further, the substation communication device is transmitted online monitoring data and off-line data by dispatch data net
Main station system is monitored on-line to net source, and net source on-line monitoring main station system carries out the processing of data acquisition and storage；
Substation communication device establishes 103 communication channel of IEC, upper power transmission by monitoring main station system on-line with net source
Net fault disturbance wave file records the file of off-line data, wave file is using IEEE Comtrade format and per second
100 frame data sampling frequencies, wave file record the electric network data before grid disturbance event occurs and after occurring in a period of time
Information, including active and reactive, voltage, electric current and frequency data；Surrounding time section time value can be manually arranged, and unit is accurate
To the second, default settings are that electric network fault disturbance occurs first 10 seconds of the moment and rear 10 seconds power grids and generator operation data；
Meanwhile substation communication device establishes 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
It is sent in frame mode.
Further, when net source on-line monitoring main station system carries out the processing of data acquisition and storage, when excitation, speed-regulating system
It breaks down or when power grid disturbs, off-line data, or net source is sent to monitor main station system on-line in the communication device active of substation
Manually perhaps period calling off-line data is deposited in relationship type or file based database application system, makees long-term preservation, for subsequent
Make perturbation analysis processing；Net source on-line monitoring main station system has manual termination and starts calling function and provide the failure of profession
The export situation of the waveform and related device in failure process in relation to electrical quantity can be analyzed and be shown to analysis tool；
On-line monitoring main station system real-time acquisition and storage processing on-line monitoring real-time dynamic data in net source will simultaneously move in real time
State data successively submit storage into time series database, make long-term preservation, use for on-line monitoring application query with analysis in real time.
Further, net source on-line monitoring main station system united analysis processing on-line monitoring real-time dynamic data and offline number
According to when, by the offline waveform query facility of main website, select any time period, the grid disturbance wave in calling and inquiry this period
Shape list of thing, the corresponding wave file of each disturbance event, automatic trigger net source exists after clicking a certain selected disturbance event
Line monitors off-line analysis program, carries out the on-line monitoring evaluation analysis of net source device involved in this grid disturbance event, evaluation
Analysis result deposit in net source on-line monitoring real-time database off-line analysis result table in, analysis after treatment net source monitor on-line from
Line analysis program is out of service；
Meanwhile net the net source on-line monitoring of source on-line monitoring main station system in real time analysis program as backstage Resident Process,
Access mode is moved back using window rolling, every 1 second period obtains net source device operation data from time series database, use first
Grid disturbance judges that algorithm carries out grid disturbance judgement, if it is judged that disturbance, which occurs, for power grid then carries out on-line monitoring Real-Time Evaluation
Analysis, evaluation analysis result are deposited in the on-line monitoring real-time database on-line analysis result table of net source.
Further, net source on-line monitoring off-line analysis and on-line analysis, analysis indexes include excitation system
Performance indicator and speed-regulating system performance indicator two major classes.
Further, the excitation system performance indicator includes: field-forcing voltage multiple, encourages electric current multiple by force and continue
Time, the gain of excitation system transient state, exciting votage responding time, excitation system delay time, excitation system nominal response, disturbance
When set end voltage time domain performance, active oscillation time-domain response criterion, PSS output with active phase difference；
The speed-regulating system performance indicator includes: that primary frequency modulation response lag time, primary frequency modulation stablize time, primary
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 speed-regulating system actual speed rate of change, primary frequency modulation 15s, 30s, 45s, 60s response rate, Primary frequency control ability are estimated.
The device have the advantages that as follows: 1) standardized net source on-line monitoring boss stand data acquisition process mode and
Boss station communication modes, convenient for the promotion and application of the invention；2) consider grid company and electricity power enterprise actual conditions and
Management require, realize net source device online monitoring data offline and be uniformly processed online, evaluated off-line (ex-post analysis) and
Line Real-Time Evaluation (analysis in progress) combines and uniformly；3) for further increase to power grid security, stable operation be monitored with
Assessment is laid a good foundation.
Detailed description of the invention
Fig. 1 is the principle of the present invention figure.
Specific embodiment
Below with reference to Figure of description, technical solution of the present invention is described in detail.
The specific steps of the present invention are as follows:
1) excitation acquisition device in substation acquires generator excitation online monitoring data.
Substation excitation acquisition device is by PT, CT and sensor with the preset sampling period to system busbar voltage, machine
End voltage and generator terminal electric current, excitation voltage and exciting current are sampled, and the instantaneous value of above-mentioned each analog quantity is obtained；System busbar
By different PT mutual inductor access excitation acquisition devices, generator terminal electric current accesses excitation by CT mutual inductor for voltage and set end voltage
Acquisition device.
Important electrical quantity based on above-mentioned sampled instantaneous value computational representation generating set operating status, comprising: 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 acquisition device receive excitation control system output characterization internal control quantity 4-20mA or 0-5V or
0-10V signal, 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 is sampled to obtain the instantaneous value of each analog quantity；
The hard contact of substation excitation acquisition device access characterization excitation system automatic/hand run switch amount, PSS put into/move back
The hard contact of switching value, excitation put into/exit the hard contact of switching value out, principal and subordinate adjusts the hard contact of channel status amount, degaussing switch position
It sets the hard contact of quantity of state, the hard contact of grid-connected position of the switch quantity of state, excitation and crosses and encourage that the hard contact of restriction state amount, excitation are low to encourage limitation
The hard contact of quantity of state obtains the switching value of reflection excitation system operating status.Substation excitation acquisition device can also 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 regulation acquisition device acquisition generator adjusts the speed online monitoring data.
Substation adjusts the speed the 4-20mA or 0- that acquisition device receives the characterization speed regulating control analog quantity of unit speed-regulating system output
5V or 0-10V signal is sampled with the preset 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 are obtained the analog quantity instantaneous value of above-mentioned reflection speed-regulating system state, and are adopted based on above-mentioned
Sample value calculates average value；
The primary frequency modulation of substation speed regulation acquisition device access characterization speed-regulating system output puts into/exits the hard contact of switching value,
Obtain the switching value of reflection speed-regulating system primary frequency modulation state.Substation adjusts the speed acquisition means can also be by logical with set speed adjustment system
It interrogates (such as RS485 serial ports) and obtains the above-mentioned quantity of state of speed-regulating system.
3) substation communication manager is by exporting 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 value of adjustment of field excitation output
It unites disturbance, and generates recorded wave file.
Substation communication manager is controlled by exporting 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 value of adjustment of field excitation output
Disturbance occurs.Judge that calculating formula is as follows:
Upss > Tth formula 5
Judgement disturbance occurrence condition are as follows: formula 1 or the establishment of formula 2 and formula 3 or the establishment of formula 4；Or formula 5 is set up.Above-mentioned condition meets
Then judge that system disturbs.
Wherein: △ T is a period of real-time detection, and starting and suspension moment are respectively t2And t1, i.e. △ T=t2-
t1。Us1And Us2Respectively t1With t2The system voltage calculated value at moment；Ug1 and Ug2 is 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 adjusting at moment controls
Voltage calculated value.Ks、Kg、Kf、KkRespectively system voltage, set end voltage, rotor voltage and the change rate for adjusting control voltage
Threshold values, Tth are the detection threshold of adjustment of field excitation output.
Such as default real-time detection period △ T can be set as 100ms, communication manager is using the Current interrupt moment as t2When
It carves, using (t2-100ms) as t1Moment.Communication manager calculates system voltage, set end voltage, rotor in time period △ T
Voltage, the differential change rate for controlling voltage.Judge whether the PSS value Upss of adjustment of field excitation output is greater 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 satisfaction then judges that system disturbs.
When judging system disturbance, set system disturbance mark, while generating disturbance waveform file.Recorded wave file record
First 5 seconds and rear 25 seconds online monitoring datas occur for disturbance, and all simulations of host computer communication are sent to comprising above-mentioned acquisition unit
Amount and quantity of state, record disturbs the operating states of the units of generating process comprehensively.If disturbance waveform file has new item during being formed
Part triggers recording, then delays from triggering moment and continue within 10 seconds to record monitoring data.
Substation communication device is by establishing pushing electric network fault disturbance wave file on 103 communication channel of IEC with main website
(off-line data), wave file use IEEE Comtrade format and 100 frame data sampling frequency per second, wave file record
Electric network data information before grid disturbance event occurs and after occurring in a period of time, including active and reactive, voltage, electric current,
The data such as frequency, surrounding time section time value can be manually arranged, and unit is accurate to the second, and default settings are electric network fault disturbances
Occur first 10 seconds of the moment and rear 10 seconds power grids and generator operation data；
Meanwhile substation communication device send net source on-line monitoring dynamic by establishing on an IEEE1344 communication channel with main website
State real time data can be used and be sent in 25 frame per second, 50 frames or 100 frame modes according to boss station bandwidth chahnel actual conditions
Monitor dynamic real time data on-line.
4) main station system carries out net source on-line monitoring offline and dynamic data unifies acquisition and storage processing.
Main station system net source 103scada program and 1344scada program are Resident Process, are responsible for off-line data and online
The acquisition and processing of real time data.
NR " 103scada program description
103scada program is by way of shared drive pipeline and 103 conventions data acquisition module of network is interactive, processing
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 processing that will acquire, including the calculating of engineering value, validity check, detection shape are carried out to metric data
State amount changes and starts corresponding treatment process etc..
B) can to each host computer communication warning information classify save, can analytic parameter value data, have to recorder data into
The function of row Data Format Transform.
C) have 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, information occlusion cannot be caused and information is caused to be lost, it is ensured that system will not collapse, crash.
When excitation, speed regulation is broken down or power grid disturbs when, 103scada program is responsible for substation communication device actively
On be sent from the acquisition and processing of line recorder data, main station system can also call offline recorder data in the artificial or period, offline
Wave file is deposited in relationship type by SQL commercialization bank interface or is deposited in file based database application system, and long-term preservation is made,
For making perturbation analysis processing afterwards.Main station system has manual termination and starts calling function and provide the failure wave-recording point of profession
The export situation of the waveform and related device in failure process in relation to electrical quantity can be analyzed and be shown to analysis tool.
NR " 1344scada program description
1344scada program is based on on-line monitoring dynamic data, realizes the real-time dynamic monitoring to unit, runs to unit
The real-time monitorings such as mode, working condition, state parameter and alarm are reflected situation of change to key index in the form of chart etc., 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 monitors
C) voltage course monitoring and early warning
D) frequecy characteristic analysis and out-of-limit early warning
1344scada acquires and handles in real time net source on-line monitoring real-time dynamic data and successively mentions real-time dynamic data
Storage is deposited into time series database, makees long-term preservation, is used for on-line monitoring application query with analysis in real time.
5) main station system alarming processing: the alerting service that main station system can call software platform to provide.Alerting service into
Journey is a Resident Process, after it receives the warning message that each application is sent, just obtains phase according to its alarm type
The alarm behavior answered, then finds the alarm movement that this behavior includes in alarm behavior defines, and most latecomer message gives every
Alarm client on machine.Alarm can need to be divided into different types according to different, alarm type can be divided into the common event,
Fault actions, failure wave-recording, operation note etc..A variety of alarm means are provided, including the prompt 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 alarm definition interfaces
The alarm behavior answered and alarm mode.
Alarm event type includes:
● excitation AVR failure classes event
● excitation AVR alerts class event
● the restricted event of excitation AVR
● excitation AVR operating status
● speed-regulating system operating status
● monitoring system exception information
6) main website carry out net source on-line monitoring offline and dynamic unity analysis handle:
Main website off-line analysis calls the offline waveform of main website to inquire man-machine tool, can select any time period, call and look into
The grid disturbance waveform list of thing into this period is ask, the corresponding offline wave file of each disturbance event clicks certain
Off-line analysis program is monitored in automatic trigger net source on-line after one selected disturbance event, is carried out involved in this grid 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, analysis after treatment net source on-line monitoring off-line analysis program is out of service.
Meanwhile analysis program is as backstage Resident Process in real time for main station system net source on-line monitoring, after being rolled using window
Access mode is moved, every 1 second period obtains net source device operation data from time series database, first using described in formula 1-5
Grid disturbance judges that algorithm carries out grid disturbance judgement, if it is judged that disturbance, which occurs, for power grid then carries out on-line monitoring Real-Time Evaluation
Analysis, evaluation analysis result are 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 analysis indexes include excitation system performance indicator and speed regulation system
System performance indicator two major classes.Excitation system performance indicator includes: field-forcing voltage multiple, encourages electric current multiple and duration by force, encourages
The machine when gain of magnetic system transient state, exciting votage responding time, excitation system delay time, excitation system nominal response, disturbance
Hold voltage time domain performance, active oscillation time-domain response criterion, PSS output and active phase difference etc..Speed-regulating system performance indicator packet
Include: primary frequency modulation response lag time, primary frequency modulation stablize time, primary frequency modulation theory contribution electricity, the practical tribute of primary frequency modulation
Offer adjustment amplitude, the speed-regulating 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 response rate, Primary frequency control ability are estimated.
The result of analysis can be shown through a variety of ways:
● two-dimensional table, histogram, pie chart, rod figure, plant stand line chart
● curve mode
● analysis bulletin mode
● report mode
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (9)
1. a kind of unified acquisition of net source online monitoring data and analysis and processing method comprising following steps:
Generator excited system online monitoring data is acquired by substation excitation acquisition device, acquisition device is adjusted the speed by substation and is adopted
Collect Generator Governor online monitoring data；
Substation communication device collects generator excited system and speed-regulating system online monitoring data, while generating under grid disturbance
Off-line data；
Substation communication device monitors generator excited system and speed-regulating system on-line number by IEC103 and 1344 specification of IEEE
Main station system is monitored on-line according to net source is given on simultaneously with off-line data；
The net source on-line monitoring main station system united analysis processing on-line monitoring dynamic real time data and off-line data, are realized
Monitor on-line analysis and subsequent off-line analysis on-line in net source；
It is 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 amplitude detection is carried out to the PSS value of excitation system output, a situation arises for comprhensive deterministic system disturbance, sentences
Disconnected calculating formula is as follows:
Upss > Tth, formula 5
In the above formulas, △ T is a period of real-time detection, and starting and suspension moment are 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
Press 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、KkRespectively system voltage, set end voltage, rotor voltage and the change rate valve for controlling voltage
Value, Tth are the detection threshold of excitation system output；
Above-mentioned grid disturbance judges the condition that algorithm judges that system disturbance occurs are as follows: formula 1 or the establishment of formula 2 and formula 3 or the establishment of formula 4；
Or formula 5 is individually set up.
2. the unified acquisition of net source according to claim 1 online monitoring data and analysis and processing method, it is characterised in that:
System busbar voltage, the set end voltage that the substation excitation acquisition device exports sensor with the preset sampling period
It is sampled with generator terminal electric current, excitation voltage and exciting current, obtains the instantaneous value of above-mentioned each analog quantity；Substation excitation acquisition dress
Set the important electrical quantity based on above-mentioned instantaneous value computational representation generating set operating status, comprising: 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 that substation excitation acquisition device exports DCgenerator motor field system, power system stabilizer output valve
Upss and stator voltage reference value Uref are sampled, and the important control amount of excitation system is obtained；
Automatic/hand run switch amount that substation excitation acquisition device exports excitation system, PSS put into/exit switching value, encourage
Magnetic puts into/exits switching value, principal and subordinate adjusts channel status amount, degaussing switch location status amount, grid-connected position of the switch quantity of state, encourages
Magnetic, which is crossed, encourages restriction state amount and the low restriction state amount of encouraging of excitation is sampled, and obtains the switch of reflection excitation system operating status
Amount, i.e. excitation system quantity of state；
Substation excitation acquisition device is using the important electrical quantity of above-mentioned unit, the important control amount of excitation system and quantity of state as online
Monitoring data are transmitted through the fiber to substation communication device.
3. the unified acquisition of net source according to claim 2 online monitoring data and analysis and processing method, it is characterised in that: institute
State sampling period satisfaction sampling number having the same in a cycle of set end voltage.
4. the unified acquisition of net source according to claim 2 online monitoring data and analysis and processing method, it is characterised in that:
The substation speed regulation acquisition device samples the important analog quantity that speed-regulating system exports with the preset sampling period,
, the power of the assembling unit poor including turbine speed, stop-valve pressure, first stage pressure and valve bit instruction obtain above-mentioned reflection speed regulation system
The analog quantity instantaneous value of system state, and average value is calculated based on above-mentioned instantaneous value；It is defeated to speed-regulating system that substation adjusts the speed acquisition device
Primary frequency modulation out puts into/exits switching value and sampled, and obtains the switching value of reflection speed-regulating system primary frequency modulation state, that is, adjusts
Speed system quantity of state；
Substation adjusts the speed acquisition device using above-mentioned Simulating Governing System amount and quantity of state as online monitoring data, is passed by optical fiber
Transport to substation communication device.
5. the unified acquisition of net source according to claim 1 online monitoring data and analysis and processing method, it is characterised in that:
Online monitoring data and off-line data are transferred to net source by dispatch data net and supervised online by the substation communication device
Main station system is surveyed, net source on-line monitoring main station system carries out the processing of data acquisition and storage；
Substation communication device establishes 103 communication channel of IEC, upper pushing electric network event by monitoring main station system on-line with net source
Hinder disturbance waveform file, that is, record the file of off-line data, wave file uses IEEE Comtrade format and 100 frame per second
Data sampling frequency, wave file record the electric network data information before grid disturbance event occurs and after occurring in a period of time,
Including active and reactive, voltage, electric current and frequency data；
Meanwhile substation communication device establishes an IEEE1344 communication channel by monitoring main station system on-line with net source, above send
Dynamic real time data is monitored on-line, according to boss station bandwidth chahnel actual conditions, using 25 frame per second, 50 frames or 100 frame sides
It is sent in formula.
6. the unified acquisition of net source according to claim 5 online monitoring data and analysis and processing method, it is characterised in that: net
When main station system progress data acquisition and storage processing is monitored in source on-line,
When excitation, speed-regulating system break down or power grid disturbs, off-line data is sent in the communication device active of substation, or
On-line monitoring main station system artificial perhaps period calling off-line data in net source deposits in relationship type or file based database application system
In, make long-term preservation, for making perturbation analysis processing afterwards；Net source on-line monitoring main station system has manual termination and starting calling
Function simultaneously provide profession unit faults recorder analysis tool, can analyze and show the waveform in failure process in relation to electrical quantity and accordingly
The export situation of device；
Net source on-line monitoring main station system acquire and handles in real time monitor on-line real-time dynamic data and by real-time dynamic data according to
Secondary submission storage makees long-term preservation into time series database, uses for on-line monitoring application query with analysis in real time.
7. the unified acquisition of net source according to claim 6 online monitoring data and analysis and processing method, it is characterised in that: net
When source monitors main station system united analysis processing on-line monitoring real-time dynamic data and off-line data on-line, pass through the offline wave of main website
Shape query facility selectes any time period, calls and inquire the grid disturbance waveform list of thing in this period, each disturbance
Event corresponds to a wave file, and off-line analysis program is monitored in automatic trigger net source on-line after clicking a certain selected disturbance event,
The on-line monitoring evaluation analysis of net source device involved in this grid disturbance event is carried out, evaluation analysis result deposits in net source and exists
Line monitors in real-time database off-line analysis result table, and analysis after treatment net source on-line monitoring off-line analysis program is out of service；
Meanwhile the net source on-line monitoring for netting source on-line monitoring main station system analyzes program as backstage Resident Process in real time, uses
Window rolling moves back access mode, and every 1 second period obtains net source device operation data from time series database, uses power grid first
Disturbance judges that algorithm carries out grid disturbance judgement, if it is judged that disturbance, which occurs, for power grid then carries out on-line monitoring Real-Time Evaluation point
Analysis, evaluation analysis result are deposited in the on-line monitoring real-time database on-line analysis result table of net source.
8. the unified acquisition of net source according to claim 7 online monitoring data and analysis and processing method, it is characterised in that:
The net source on-line monitoring off-line analysis and on-line analysis, analysis indexes include excitation system performance indicator and speed regulation
System performance index two major classes.
9. the unified acquisition of net source according to claim 8 online monitoring data and analysis and processing method, it is characterised in that:
The excitation system performance indicator includes: field-forcing voltage multiple, to encourage electric current multiple and duration, excitation system by force temporary
State gain, exciting votage responding time, excitation system delay time, excitation system nominal response, disturbance when set end voltage when
Domain performance, active oscillation time-domain response criterion, PSS output and active phase difference；
The speed-regulating system performance indicator includes: primary frequency modulation response lag time, primary frequency modulation stable 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 speed-regulating system actual speed rate of change, primary frequency modulation 15s, 30s, 45s, 60s response rate, Primary frequency control ability are estimated.
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| CN107436392B (en) * | 2017-09-26 | 2019-12-10 | 国网四川省电力公司电力科学研究院 | Cable single-phase earth fault detection method and system |
| CN108051744A (en) * | 2018-01-05 | 2018-05-18 | 贵州电网有限责任公司电力调度控制中心 | A kind of excitation harvester for generator on-line monitoring system |
| 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 |
| CN108169676A (en) * | 2018-01-05 | 2018-06-15 | 贵州电网有限责任公司电力调度控制中心 | A kind of generator on the spot online acquisition device and monitoring system |
| CN112578738A (en) * | 2019-09-29 | 2021-03-30 | 南京南瑞继保电气有限公司 | Network source coordination network-related parameter variable distributed acquisition and centralized transmission device |
| CN111080065A (en) * | 2019-11-18 | 2020-04-28 | 国网河北省电力有限公司电力科学研究院 | Network source coordination source side performance edge computing and analyzing platform based on multi-metadata fusion |
| CN110889646B (en) * | 2019-12-06 | 2023-04-18 | 华北电力大学 | Method for checking correctness of operating parameters of generator set adapting to working condition change |
| CN111626542B (en) * | 2020-04-01 | 2023-08-01 | 广州擎天实业有限公司 | Big data-based detection method for generator excitation system |
| CN111736545B (en) * | 2020-05-20 | 2021-08-17 | 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 |
| CN112910003A (en) * | 2021-03-09 | 2021-06-04 | 青海绿能数据有限公司 | New energy generator set grid-connected operation real-time monitoring system and fault control method thereof |
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