CN105823985B - A kind of generator excited system on-line monitoring and assessment system based on WAMS dynamic datas - Google Patents
A kind of generator excited system on-line monitoring and assessment system based on WAMS dynamic datas Download PDFInfo
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- CN105823985B CN105823985B CN201610140593.0A CN201610140593A CN105823985B CN 105823985 B CN105823985 B CN 105823985B CN 201610140593 A CN201610140593 A CN 201610140593A CN 105823985 B CN105823985 B CN 105823985B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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Abstract
A kind of generator excited system on-line monitoring and assessment system based on WAMS dynamic datas, including generator state monitoring module, field regulator power system stabilizer power oscillation damping effect assessment module, field regulator limitation and protection act correctness evaluation module.It calculates and monitors in real time operation state of generator index, assessment field regulator power system stabilizer power oscillation damping ability and evaluation is made to field regulator limitation and the correctness of protection act online.The present invention is using equipment on-line monitoring as means, build the monitoring and evaluation platform of generator excited system, by remotely being monitored in real time to generator excited system operation conditions, find that mains side influences the factor of power network safety operation, while also quickly positions excitation system problem for dispatching of power netwoks operations staff and provide auxiliary tool and convenient means in time.
Description
Technical field
The invention belongs to Electrical Power System Dynamics to monitor field, and in particular to one kind is based on power grid Wide Area Measurement System (i.e.
WAMS) the generator excited system on-line monitoring and assessment system of dynamic data.
Background technology
With the continuous expansion of national interconnected network scale, power system stability problem is concerned.Wherein, generator is encouraged
Magnetic control is to maintain the constant reactive power reasonable distribution between parallel running unit of set end voltage, while is also to improve and carry
One of most economical effective method of high stability of power system.But for a long time, lack it is a kind of according to measured data to power generation
The method system that machine excitation system validity is assessed.
With the development of phasor measurement unit (PMU) and Wide Area Measurement System (WAMS) technology.The various dynamics letter of unit
Breath puts into/exits signal including excitation system power system stabilizer, low encourage limitation action signal, strong encourages limitation action letter
Number, volt hertz limitation action signal and power system stabilizer output signal be included in WAMS measuring ranges, solve electricity
Force system stabilizer PSS exports the wide area synchronous measure and problem of data integration with power grid Dynamic Phasors.For generator excitation system
System on-line monitoring assessment provides data basis.Based on this, the present invention proposes that a kind of generator based on WAMS dynamic datas is encouraged
Magnetic system is monitored on-line and assessment system.
Invention content
The purpose of the present invention is it is middle for the above-mentioned prior art the shortcomings that, provide one kind can monitor Generator Status and
When tracking evaluation field regulator power system stabilizer power oscillation damping effect and on-line evaluation adjustment of field excitation
Device limits the real-time monitoring and evaluating system with protection act correctness.It, can by the real time on-line monitoring to excitation system failure
The operation conditions of overall merit generator excited system.
Technical solution is used by the present invention solves its goal of the invention：
A kind of excitation system on-line monitoring and assessment system based on WAMS dynamic datas, the excitation system on-line monitoring
Include generator state monitoring module, field regulator power system stabilizer power oscillation damping effect with assessment system
Evaluation module, field regulator limitation and protection act correctness evaluation module and visualization man-machine interface；It is characterized in that：
The generator state monitoring module, field regulator power system stabilizer power oscillation damping effect are commented
Valency module, field regulator limitation and the input terminal of protection act correctness evaluation module with wide area measurement system WAMS phases
Even, output terminal is connected to visualization man-machine interface；
The generator state monitoring module, field regulator power system stabilizer power oscillation damping effect are commented
Valency module, field regulator limitation and protection act correctness evaluation module reading wide area measurement system WAMS time serieses are real-time
Library data calculate the evaluation index of each function module and export the evaluation index and fault warning, fault data in real time
To visualization man-machine interface.
The generator state monitoring module reads wide area measurement system WAMS time series real-time database data, monitors in real time
Generator terminal voltage, generator generator terminal electric current, generator frequency, generator active power, generator reactive power, when above-mentioned
The electrical quantity monitored in real time is more than the correspondence electrical quantity threshold value of setting or its variable quantity is more than the correspondence variable quantity threshold of setting
During value, then it is assumed that operation state of generator is abnormal, and the on-line monitoring sends out fault warning, and storage hair automatically with assessment system
Motor set end voltage, generator generator terminal electric current, generator excitation voltage, exciter current of generator, generator frequency, generator have
The data of work(power, generator reactive power in fault time section, draw fault waveform curve, are shown by visualizing man-machine interface
Show.
The field regulator power system stabilizer power oscillation damping effect assessment module reads wide area measurement system
System WAMS time series real-time database data, monitor generator active power and power system stabilizer output voltage in real time
Urpss when Urpss is more than the alarm threshold of setting, calculates the average damping ratio of active power response curve, to generating set
Field regulator power system stabilizer inhibits electricity grid oscillating effect discriminatory analysis, and the field regulator is electric
Force system stabilizer PSS power oscillation damping effect analysis results are exported to visualization man-machine interface.
The field regulator limitation reads wide area measurement system WAMS time sequences with protection act correctness evaluation module
Row real-time database data are calculated according to the limitation of the inside of the field regulator to prestore and relay protective scheme model, are obtained corresponding
Judging result and the limitation of the field regulator of power plant practical application are compared with protection act switching value, judge adjustment of field excitation
Device will be exported with the presence or absence of the result of appraisal of malfunction, misaction to visualizing man-machine boundary with the presence or absence of malfunction, misaction
Face.
The present invention makes full use of WAMS dynamic datas to meet state's tune center and is advised about source net dynamic property on-line monitoring technique
The feature of model (allocation and transportation (2014) 32).Inhibit from generator state monitoring module, field regulator power system stabilizer
Three low-frequency oscillation effect assessment module, field regulator limitation and protection act correctness evaluation module aspect comprehensive assessments point
Generator excited system operating condition is analysed, auxiliary dispatching operations staff is intuitive, comprehensively reflection the whole network generator excited system is transported
Market condition.
The present invention can effectively solve the problems, such as that generator excited system is difficult to assess；The system of structure is as intelligent grid
Subelements of the WAMS of supporting system technology under quickly grasps generator excited system index for management and running personnel
It provides convenience, more detailed aid decision foundation is provided for further analysis generator excitation system.
Description of the drawings
Fig. 1 is generator excited system on-line monitoring of the present invention and the functional block diagram of assessment system；
Fig. 2, which is that field regulator of the present invention is low, encourages limitation action correctness evaluation logic block diagram；
Fig. 3 is that field regulator of the present invention encourages by force limitation action correctness evaluation logic block diagram；
Fig. 4 is field regulator volt hertz limitation action correctness evaluation logic block diagram of the present invention.
Specific embodiment
Technical scheme of the present invention is described in further details with reference to the accompanying drawings of the specification.
The present invention is suitable for different power plant, the monitoring and evaluation of different generator excited systems.It is encouraged by providing generator
The parameter list of magnetic system, according to the evaluation index of the real-time computing module of generating set related data.Generator excited system exists
Line monitoring and evaluation system belongs to a subelement under WAMS is applied, based on intelligent grid supporting system technology platform,
The each of generator excited system is quickly grasped for management and running personnel with assessment system by generator excited system on-line monitoring
Index is provided convenience, for further analysis generator excitation system operating condition provide more detailed aid decision according to
According to.
Generator excited system on-line monitoring of the present invention and assessment system are as shown in Figure 1.A kind of base disclosed by the invention
Include generator state monitoring module, Excitation Adjustment with assessment system in the generator excited system on-line monitoring of WAMS dynamic datas
Save device power system stabilizer power oscillation damping effect assessment module, field regulator limitation and protection act correctness
Evaluation module.
The generator state monitoring module, field regulator power system stabilizer power oscillation damping effect are commented
Valency module, field regulator limitation and protection act correctness evaluation module reading wide area measurement system WAMS time serieses are real-time
Library data calculate the evaluation index of each function module and export the evaluation index and fault warning, fault data in real time
To visualization man-machine interface.
The generator on-line monitoring module reads wide area measurement system WAMS time series real-time database data, including power generation
The electrical quantity such as machine set end voltage, generator generator terminal electric current, generator frequency, generator active power, generator reactive power are right
Data carry out the pretreatment of data, standardization processing.These electrical quantity of real time on-line monitoring, when its be more than setting threshold value or
When its variable quantity is more than the threshold value of setting, then it is assumed that operation state of generator is abnormal, and assessment system sends out fault warning, and certainly
Dynamic storage generator terminal voltage, generator generator terminal electric current, generator excitation voltage, exciter current of generator, generator frequency,
The data of generator active power, generator reactive power in fault time section, draw fault waveform curve, pass through visible human
Machine interface display.
The field regulator power system stabilizer power oscillation damping effect assessment module reads wide area measurement system
System WAMS time series real-time database data, monitor field regulator power system stabilizer output signal U rpss in real time, when
When field regulator power system stabilizer output signal U rpss is more than alarm threshold, then it is assumed that the electric power of generator connection
Low-frequency oscillation occurs for system.Store generator terminal voltage, exciter current of generator, generator active power, generator reactive
The waveforms such as power.It is bent that generator active power disturbance response is calculated according to active power perturbation response curve during low-frequency oscillation
The average damping ratio ζ of line：
In formula：N be calculating cycle number, refer to the periodicity during low-frequency oscillation, i.e., from judge power grid generation low frequency shake
Startup label moment when swinging starts to tend to the required periodicity of steady-state value to network re-active power response curve；P1、P2It is low
First and second power peak that the frequency duration of oscillation occurs, unit are megawatt (MW)；P2N+1、P2N+2For during low-frequency oscillation
(2N+1) occurred is a and (2N+2) a power peak, unit are megawatt (MW)；
According to the result of calculation of the average damping ratio ζ of generator active power perturbation response curve to generating unit excitation tune
It saves device power system stabilizer and inhibits electricity grid oscillating effect discriminatory analysis：When dampingratioζ is more than the threshold value of setting
When, it is believed that the power system stabilizer of adjuster can effectively inhibit electricity grid oscillating；When dampingratioζ is less than setting
During threshold value, it is believed that the power system stabilizer of adjuster inhibits electricity grid oscillating effect not notable, by what is be calculated
The judging result storage of damping when PSS power oscillation dampings effect passes through and visualizes man-machine interface and look into in commercial library table
Commercial library table and WAMS historical time sequence library data are ask, the evaluation index are shown with data, table and curve form, simultaneously
System alarm prompts staff, to understand the effect of field regulator power system stabilizer power oscillation damping in time
Fruit carries out parameters revision to the power system stabilizer of inhibition difference.Damping ratio threshold value is generated electricity according to large-scale steamer
Machine is independently set from shunt excitation static excitation system technical conditions by those skilled in the art.For large turbo-type generator, this Shen
Please preferably described damping ratio threshold value be selected as 0.1.The field regulator limitation is read with protection act correctness evaluation module
Wide area measurement system WAMS time series real-time database data, to WAMS time series real-time databases data carry out data pretreatment,
Standardization processing.According to treated generating set related data, carried out according to field regulator protection and circumscription logic model
It calculates, obtains whether corresponding field regulator limitation acts with protection.With it is real-time from wide area measurement system WAMS time serieses
Library digital independent to practical application field regulator protection with limit step switch amount compared, so as to judge Excitation Adjustment
Device is saved with the presence or absence of malfunction, misaction.Field regulator is limited to be included low encouraging limitation and guarantor with the evaluation of protection act correctness
The evaluation of shield action correctness encourages by force limitation and the evaluation of protection correctness, the limitation of volt hertz and protects correctness evaluation, encouraged above-mentioned
Magnestat limits and protection act evaluation index is stored in the form of recording into commercial library table, is shown by visualizing man-machine interface
Show.
Low limitation action correctness decision logic of encouraging is as shown in Fig. 2, wherein Pe is active power, Pe01 is active power
0.1s filter values, Qe are reactive power, Qe01 is reactive power 0.1s filter values, and P1, P2, P3, P4, P5 are low to encourage restrictive curve
Active intersection point, Q1, Q2, Q3, Q4, Q5 are low to encourage the idle intersection point of restrictive curve.According to active power 0.1s filter value Pe01, it is obtained
The low reactive power critical value Qe encouraged on restrictive curveIt is criticalIf reactive power 0.1s filter values are less than or equal to reactive power critical value
QeIt is critical, then meet it is low encourage restrictive condition, assessment system is low to encourage limitation signalizing activity, on the contrary.Simultaneously by the result and WAMS systems
It is low encourage limitation alarm signal comparison, if the two action is inconsistent, then it is assumed that " low encourage limitation remarkable action ", assessment system is sent out
Alarm.It is strong to encourage limitation action correctness decision logic as shown in figure 3, wherein If is exciting current perunit value, If01 is excitation electricity
The 0.1s filter values of perunit value are flowed, Lifr encourages top value electric current to be strong, and Ifx is long-term current value, and for Q1 to encourage the time by force, NQY is volume
Determine calorific value, calculation formula is：NQY=[encourages by force top value electric current * and encourages top value electric current -1.0*1.0 by force] * and encourages by force the time, and If01 is
The filter value of exciting current 0.1s.When exciting current If is more than 1.1p.u., proceeds by and encourage inverse time lag calculating by force, and will
To result of calculation, that is, rotor practical calorific value compared with rated thermal amount NQY, when practical calorific value be more than rated thermal amount
When, then meet and encourage restrictive condition by force, assessment system encourages by force limitation signalizing activity, on the contrary.Simultaneously by the result and WAMS systems
It is strong to encourage limitation alarm signal comparison, if the two action is inconsistent, then it is assumed that " encouraging limitation remarkable action by force ", assessment system sends out announcement
It is alert.Hertz action correctness decision logic is lied prostrate as shown in figure 4, wherein Ut is generator terminal voltage perunit value, Fr is generator
Frequency perunit value, M1 are specified flux density, M2 is flux density top value, M3 is limitation involution, C2 is operation time limit.Calculate Ut/Fr and volume
Determine the difference of flux density M1, and difference is integrated, when its integration and (program loop is during more than (M2-M1) * C2*25
40ms) or Ut/Fr continues more than 2s more than M2 states, then meets volt hertz restrictive condition, assessment system volt hertz limitation signal
Action, it is on the contrary.The volt hertz of the result and WAMS systems limitation alarm signal is compared simultaneously, if the two action is inconsistent,
Think " volt hertz limitation remarkable action ", assessment system sends out alarm.
Claims (7)
1. a kind of generator excited system on-line monitoring and assessment system, the excitation system based on WAMS dynamic datas are online
Monitoring and evaluation system includes generator state monitoring module, field regulator power system stabilizer power oscillation damping
Effect assessment module, field regulator limitation and protection act correctness evaluation module and visualization man-machine interface；Its feature exists
In：
The generator state monitoring module, field regulator power system stabilizer power oscillation damping effect assessment mould
Block, field regulator limitation are connected with the input terminal of protection act correctness evaluation module with wide area measurement system WAMS, defeated
Outlet is connected to visualization man-machine interface；
The generator state monitoring module, field regulator power system stabilizer power oscillation damping effect assessment mould
Block, field regulator limitation read wide area measurement system WAMS time series real-time database numbers with protection act correctness evaluation module
According to calculating the evaluation index of each function module in real time and export evaluation result and fault warning, fault data to visualization
Man-machine interface.
2. generator excited system on-line monitoring and assessment system according to claim 1 based on WAMS dynamic datas,
It is characterized in that：
The generator state monitoring module reads wide area measurement system WAMS time series real-time database data, in real time monitoring power generation
Machine set end voltage, generator generator terminal electric current, generator frequency, generator active power and generator reactive power, when above-mentioned
The electrical quantity monitored in real time is more than the correspondence electrical quantity threshold value of setting or its variable quantity is more than the correspondence variable quantity threshold of setting
During value, then it is assumed that operation state of generator is abnormal, and the on-line monitoring sends out fault warning, and storage hair automatically with assessment system
Motor set end voltage, generator generator terminal electric current, generator excitation voltage, exciter current of generator, generator frequency, generator have
Work(power and generator reactive power are in the data of fault time section, drafting fault waveform curve, by visualizing man-machine boundary
Face is shown.
3. generator excited system on-line monitoring and assessment system according to claim 1 based on WAMS dynamic datas,
It is characterized in that：
The field regulator power system stabilizer power oscillation damping effect assessment module reads wide area measurement system
WAMS time series real-time database data monitor generator active power and power system stabilizer output voltage in real time
Urpss when Urpss is more than the alarm threshold of setting, calculates the average damping ratio of active power response curve, to generating set
Field regulator power system stabilizer inhibits electricity grid oscillating effect discriminatory analysis, and the field regulator is electric
Force system stabilizer PSS power oscillation damping effect analysis results are exported to visualization man-machine interface.
4. generator excited system on-line monitoring and assessment system according to claim 3 based on WAMS dynamic datas,
It is characterized in that：
According to the result of calculation of the average damping ratio ζ of generator active power response curve to generating unit excitation adjuster electric power
System stabilizer PSS inhibits electricity grid oscillating effect discriminatory analysis：When dampingratioζ is more than the damping ratio threshold value of setting,
Electricity grid oscillating can effectively be inhibited by thinking the power system stabilizer of adjuster；When dampingratioζ is less than the damping of setting
During than threshold value, it is believed that the power system stabilizer of adjuster inhibits electricity grid oscillating effect not notable；
By the above-mentioned discriminatory analysis for inhibiting electricity grid oscillating effect to generating unit excitation adjuster power system stabilizer
As a result it stores in commercial library table, and passes through and visualize man-machine interface queries commercialization library table and WAMS historical time sequence library numbers
According to the displaying of data, table and curve form, simultaneity factor alarm prompt staff, to understand field regulator in time
The effect of power system stabilizer power oscillation damping carries out parameter to the power system stabilizer of inhibition difference and repaiies
Just.
5. generator excited system on-line monitoring and assessment system according to claim 4 based on WAMS dynamic datas,
It is characterized in that：
The damping ratio threshold value is set according to large turbo-type generator from shunt excitation static excitation system technical conditions.
6. generator excited system on-line monitoring and assessment system according to claim 5 based on WAMS dynamic datas,
It is characterized in that：
The damping ratio threshold value is selected as 0.1.
7. generator excited system on-line monitoring and assessment system according to claim 1 based on WAMS dynamic datas,
It is characterized in that：
The field regulator limitation reads wide area measurement system WAMS time serieses reality with protection act correctness evaluation module
When library data, calculated according to the limitation of the inside of the field regulator to prestore and relay protective scheme model, judged accordingly
As a result the limitation with the field regulator of power plant practical application is compared with protection act switching value, judges that field regulator is
It is no there are malfunction, misaction, and will with the presence or absence of the result of appraisal of malfunction, misaction export to visualization man-machine interface.
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| CN106383311B (en) * | 2016-11-25 | 2018-12-11 | 国网浙江省电力有限公司电力科学研究院 | A kind of online judgment method of generator excitation limiting performance |
| CN108199350B (en) * | 2017-11-27 | 2019-11-05 | 上海电气电站设备有限公司 | A kind of generator overexcitation limitation guard method |
| CN108681817B (en) * | 2018-05-17 | 2021-08-06 | 中电普瑞电力工程有限公司 | Excitation system performance evaluation method and device and storage medium |
| CN109308529B (en) * | 2018-10-11 | 2021-11-30 | 国网山东省电力公司电力科学研究院 | Unit excitation function comprehensive performance evaluation method applied to network source platform |
| CN109256806B (en) * | 2018-10-26 | 2021-09-17 | 中国电力科学研究院有限公司 | Low excitation limit medium and long term model building method and system based on digital-analog hybrid real-time simulation |
| CN109946605B (en) * | 2019-04-02 | 2021-02-02 | 中交机电工程局有限公司 | On-line monitoring system for dynamic characteristics in starting process of motor |
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