CN104104292A - Real-time power generator excitation system state wide area acquisition system - Google Patents
Real-time power generator excitation system state wide area acquisition system Download PDFInfo
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Abstract
The invention relates to a real-time power generator excitation system state wide area acquisition system, which comprises a data acquisition system, a data transmission system and a data storage system, wherein the data acquisition system is connected with the data storage system via the data transmission system and the data are transmitted to the data storage system. compared with the prior art, relevant states, such as the excitation transformer state, the power generator unit state, the adjustor state, the power unit state, the rotor state and the de-excitation state, of the power generator excitation system can be acquired synchronous in real time, a tool is provided for a dispatching centre to acquire the synchronous state data of the excitation system, and also data information is provided for state maintenance of the excitation system.
Description
Technical field
The present invention relates to a kind of generator system state wide area real-time acquisition system, relate in particular to a kind of generator excited system state wide area real-time synchronization and obtain system.
Background technology
The Wide Area Power is interconnected have been realized between each regional power grid standby, emergency episode each other and has supported, promote the benefit of interconnections such as electricity market exploitation, but the employing of the expansion of electrical network scale, the complexity of electric network composition and various New Technologies of Electric Power Transmissions, becomes increasingly complex the dynamic behaviour of electric power system.Therefore, the real-time monitoring of stability of electrical network and control just seem more and more important.
The problem that shows to exist already in electrical network many small interference stabilities, voltage stabilization, transient stability is calculated in the stabilization of power grids, and follow the enforcement of the great electricity power engineerings such as domestic extra-high voltage grid construction, the series-parallel connection of alternating current-direct current electrical network, three Hua Lian nets, electrical network scale is in rapid expansion, the structure of electrical network and operational mode are unprecedentedly complicated, and electrical network interference stability problem highlights day by day.
Excitation system is the important component part of synchronous generator, is one of crucial control appliance of generator, and it has direct impact to the operational reliability of generator, economy and other characteristics.Good excitation system can improve electric power system and generator stability limit level and running technology economic index effectively.
Generator excited system model is as the important component part of electric power system electromechanical transient Mathematical Modeling, the accuracy of its model parameter has directly determined correctness and the confidence level of Model for Stability Calculation of Power System, and then affects formulation and the enforcement of system operation control measure.
The excitation system model current, the middle-and-high-ranking application module of dispatching of power netwoks department EMS (EMS) (PAS) adopts, adjusting of its model parameter generally determined in generating set grid-connected commissioning test first.Along with the accumulation of unit operating time, excitation system performance is difficult to avoid to decline, and its corresponding excitation system model parameter certainly will also change.But dispatching of power netwoks department is owing to lacking the measured data of excitation system after grid-connected, and its excitation system model exists and do not upgrade or upgrade problem not in time.Cause thus the excitation system model of dispatching of power netwoks department foundation in power grid stability analysis calculates can not be revised timely owing to lacking comparison data, the correctness of result of calculation and confidence level are reduced.
It is traditional that to take the monitoring system that data acquisition and monitoring/EMS (SCADA/EMS) be representative be the power system operation monitoring tool being based upon in steady-state load flow level, but it lacks data synchronizing capacity, and sample rate is low, make it to meet the dynamic monitoring of monitoring generator excited system and the demand that expert data is analyzed.The failure wave-recording instrument that is arranged on each power plant and transformer station can record electromagnetic transient, yet the time of recorder data does not have unified time standard, record data can only be done effectively local, can not be used for doing system-wide dynamic analysis, and the analysis of Power system dynamic process often needs the synchronized phasor data such as the voltage, electric current of non-volatile recording compare and analyze, and the current monitoring system record ripple time is shorter, therefore the general accident analysis being applicable to after catastrophe failure, can not meet the analysis of analysis, the especially growth process of full electric network dynamic process completely.And obtain excitation system real time information, to realizing the dynamic tracing and managing of machine net coordination process, strengthen scheduling to relating to management, the examination ability of net DCgenerator motor field system; Meanwhile, the synchronous real time data of excitation, to power system operating mode stability, all has and has important value system emulation, model checking, the stability of analysis and appraise.On the other hand, generator excited system being carried out to real-time status monitoring is also it to be carried out to the basis of State Maintenance.
Summary of the invention
Object of the present invention is exactly to provide a kind of generator excited system state wide area real-time acquisition system in order to overcome the defect of above-mentioned prior art existence, this system energy Real-time Obtaining generator excited system correlation behavior, comprise that excitation becomes state, generating set state, adjuster state, power cell state, rotor and demagnetization state etc., there is the synchronous time adjustment function of wide area, target status data when real-time band can be provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of generator excited system state wide area real-time acquisition system, comprise: a data acquisition system, the data transmission system data-storage system of unifying, described data acquisition system, by data transmission system connection data storage system, transfers data to described data-storage system;
Wherein, described data acquisition system comprises:
At least one GPS receiver module, it receives the temporal information of gps time system from gps satellite;
The intelligent electronic device measurement module identical with a GPS receiver module quantity, itself and the described corresponding connection of a GPS receiver module, receive the temporal information of a GPS receiver module transmission with correspondence; The temporal information that described intelligent electronic device measurement module basis receives, the status signal of synchro measure generator excited system, and export in real time target status signal while being with;
One data acquisition module, it is connected with described intelligent electronic device measurement module, to receive the status signal of the generator excited system of each intelligent electronic device measurement module transmission; Described data acquisition module is also connected with described data transmission system;
Described data-storage system comprises:
One the 2nd GPS receiver module, it receives the temporal information of gps time system from gps satellite;
One database server, it is connected with described the 2nd GPS receiver module, and described database server provides a communication interface, by this communication interface, is connected with power-management centre, carries out exchanges data.
Described data transmission system comprises interconnective communication interface and communication network, described communication interface connection data acquisition system, and with the output signal that receives described data acquisition system, described communication network is connected with described data-storage system.
Described data-storage system also comprises a data memory module, and this data memory module is connected with described database server.
The status signal of the generator excited system that intelligent electronic device measurement module is measured comprises: three-phase voltage phasor, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal at least one of them.
The status signal of described generator excited system also comprises: generator built-in potential and generator's power and angle.
Described data-storage system receives an a Remote triggering signal or triggering signal on the spot, to obtain data from data acquisition system.
Described data-storage system adopts the method storage data of circulation storage between some high-speed caches.
The process of described data-storage system storage data is: when generator system has fault, the data of retention fault front and back a period of time also start to upload to current high-speed cache, after end is uploaded, call next high-speed cache; When generator system fault-free, in the storage that circulates of current high-speed cache.
The database server of described data-storage system comprises real-time data base and historical data base.
Described database server also provides a communication interface, by this communication interface, is connected with unit work station, carries out exchanges data.
The speed of data acquisition system data acquisition can be set.
In the technical program, data acquisition system transmits Real-time Monitoring Data, recorder data, state information and solicited message by data transmission system to data-storage system; The transmission speed of real time data can be set; Output time delay, the time difference of Real-time Monitoring Data markers and data output time is not more than 30ms; The ability that possesses while and a plurality of master station communications, the communication between substation and a plurality of main website does not interfere with each other; Communication protocol meets the requirement of < < Real-Time Dynamic Monitoring System of Power systems technology standard > >.
The continuous real time record three-phase voltage of data-storage system phasor, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal; Continuous real time record generator built-in potential also while being arranged on power plant; When electric power system generation disturbance or synchronizing signal are when abnormal, system is set up event identifier according to markers, to facilitate user to obtain the real-time recorded data of event period of right time; When following disturbance event occurs system, start transient state and record ripple: frequency out-of-limit, frequency change rate are out-of-limit, voltage out-of-limit, voltage jump are out-of-limit, positive sequence, negative phase-sequence, residual voltage are out-of-limit, electric current is out-of-limit, and current break is out-of-limit, and positive sequence, negative phase-sequence, zero-sequence current are out-of-limit; Building database.
Generator excited system state wide area real-time acquisition system of the present invention is when transient state record ripple, and data sampling speed was not less than for 4800 point/second, i.e. 96 points/cycles; Temporal Data record format meets ANSI/IEEEC37.111-1991 (COMTRADE) requirement.
Because monitoring information data volume is very huge, therefore can make full use of computer technology manages these data, system, they are effectively applied with technical assurance, can adopt open database structure, set up unified Data Analysis Platform while having ready conditions.In native system for the scientific management of the mass data that guarantees on-line monitoring to obtain with effectively utilize, select specially a status data server stores useful data, join a set of read-write CD drive that records a plurality of sessions, as large capacity alternate device, for system backup and data backup.For meeting the needs of diagnostic analysis, following principle is considered in quantity of state storage: 1, the availability of guarantee information, and information storage density can meet the needs of analysis; 2, the reliability of guarantee information, the examination of information when unit recovers from abnormal conditions (as power down); 3, be conducive to convenience, information inquiry reliably; 4, because information storage takies a large amount of cpu resources, must guarantee completing of the interior all tasks of local control unit program circulating period; 5, save to greatest extent memory space.According to above principle, the server database of the described data-storage system of foundation comprises real-time data base and historical data base.
Real-time data base, for preserving the original sampling data of nearest a period of time, meets user unit is monitored to needs in real time; Real-time data base, when accident appears in unit, can be used for emergency review simultaneously; Data in this database are deposited according to time sequencing, and user can inquire about according to the time.
The whole historical datas of historical data base for preserving all unit operations of power plant, comprise the data that Real-time Monitoring Data and off-line unit performance are tested; Data in database are periodically refreshed, and system deposits Useful Information in historical data base in after Real-time Monitoring Data is processed; Because data volume is huge, the data that deposit in historical data base all need compression, the convenience of while in order to inquire about, and the data of all previous test all have index, and index comprises machine group number, test data sheet explanation and test duration; User can carry out quick search according to index.
This system is utilized the pulse per second (PPS) Synchronous Sampling Pulse of GPS, be not more than ± 1 μ s of the synchronous error of sampling pulse; When synchronizing clock signals is lost or be abnormal, can maintain normal work; At synchronizing clock signals, lose in 30 minutes, phase angle measurement error is not more than 1 degree.
When this system PT/CT broken string, DC supply interruption, plant failure, communication abnormality, system is sent out alarm signal; House dog is set, when interference causes program to walk dead or power failure, makes system automatically recover normal work.
Compared with prior art, synchro measure of the present invention and record the data such as generator three-phase voltage phasor, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal, generator built-in potential and merit angle, thereby Real-time Obtaining, record also externally provide and comprise that excitation becomes real time data and the historical data of the generator excited system correlation behaviors such as state, generating set state, adjuster state, power cell state, rotor and demagnetization state.Generator excited system state wide area real-time acquisition system of the present invention not only provides instrument for control centre obtains excitation system synchronous regime data, and also the repair based on condition of component for excitation system provides data message.
This system acquisition excitation system real time information, realize the dynamic tracing and managing to machine net coordination process, strengthen scheduling to relating to management, the examination ability of net DCgenerator motor field system; Meanwhile, excitation intelligent assembly synchrodata, to power system operating mode stability, has important value to system emulation, model checking, the stability of analysis and appraise.
This system is overhauled sufficient data message is provided for unit station state, by advanced status monitoring means, reliable evaluation means and life prediction means, the state of judgment device, the early stage sign of identification fault, trouble location and the order of severity thereof, fault progression trend are judged, and drop to a certain degree or fault is keeped in repair before will occurring in equipment performance according to analyzing and diagnosing result, met the requirement that enterprise reduces expenses, increases the benefit.
This system not only can be sent to monitored excitation system synchronous regime data control centre and participate in power scheduling, can also, for the monitoring management in power plant, to the stable operation of electrical network, have great meaning.
Accompanying drawing explanation
Fig. 1 is generator excited system state wide area real-time acquisition system Organization Chart of the present invention;
Fig. 2 is a kind of data Stored Procedure figure of generator excited system state wide area real-time acquisition system of the present invention;
Fig. 3 is generator excited system state wide area real-time acquisition system surveillance map of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of generator excited system state wide area real-time acquisition system, comprise data acquisition system 1, data transmission system 2 and data-storage system 3, described data acquisition system 1 passes to described data-storage system 3 by described data transmission system 2 by data.
Data acquisition system 1 comprises data acquisition module 6, three IED measurement modules 5 and three GPS receiver modules 11, data acquisition module 6 is connected with IED measurement module 5, IED measurement module 5 is connected with a GPS receiver module 11, and data acquisition module 6 outputs signal to data transmission system 2.
Data transmission system 2 comprises connected communication interface 7 and communication network 8, and communication interface 7 receives the output signal of data acquisition system 1, and communication network 8 is connected with data-storage system 3.
Data-storage system 3 comprises database server 9, data memory module 10 and the 2nd GPS receiver module 16, database server 9 is connected with data memory module 10 and the 2nd GPS receiver module 16, database server 9 provide a communication interface for power-management centre 15 swap datas, also provide a communication interface for unit work station 12 swap datas.
Data acquisition system 1 is measured generator three-phase voltage phasor, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal based on gps time system synchronization; While being arranged on power plant, also measure generator built-in potential and merit angle; The speed of data acquisition can be set, and each cycle sampling number can be made as 4,6.8,12.16.24.32, and 48,64,96,128,192,384 times/turn.
Data transmission system 2 is responsible for data acquisition system 1 and is transmitted Real-time Monitoring Data, recorder data, state information and solicited message to data-storage system 3; The transmission speed of real time data can be set; Output time delay, the time difference of Real-time Monitoring Data markers and data output time is not more than 30ms; The ability that possesses while and a plurality of master station communications, the communication between substation and a plurality of main website does not interfere with each other; Communication protocol meets the requirement of < < Real-Time Dynamic Monitoring System of Power systems technology standard > >.
Data-storage system 3 is based on the continuous real time record three-phase voltage of gps time system phasor, three-phase current phasor, fundamental positive sequence voltage phasor, fundamental positive sequence electric current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal; Continuous real time record generator built-in potential also while being arranged on power plant; When electric power system generation disturbance or synchronizing signal are when abnormal, system is set up event identifier according to markers, to facilitate user to obtain the real-time recorded data of event period of right time; When following disturbance event occurs system, start transient state and record ripple: frequency out-of-limit, frequency change rate are out-of-limit, voltage out-of-limit, voltage jump are out-of-limit, positive sequence, negative phase-sequence, residual voltage are out-of-limit, electric current is out-of-limit, and current break is out-of-limit, and positive sequence, negative phase-sequence, zero-sequence current are out-of-limit; Building database.
The transient state of data-storage system 3 is recorded wave energy on the spot or Remote triggering; During transient state record ripple, data sampling speed was not less than for 4800 point/second, i.e. 96 points/cycles; Temporal Data record format meets ANSI/IEEE C37.111-1991 (COMTRADE) requirement.
As shown in Figure 2, data-storage system 3 adopts the method storage data of circulation storage between some high-speed caches; A period of time data start to upload to current high-speed cache before and after retention fault when generator has fault are called next high-speed cache after finishing to upload, during fault-free in the storage that circulates of current high-speed cache.
Real-time data base, for preserving the original sampling data of nearest 72 hours, meets user unit is monitored to needs in real time; Real-time data base, when accident appears in unit, can be used for emergency review simultaneously; Data in this database are deposited according to time sequencing, and user can inquire about according to the time.
The whole historical datas of historical data base for preserving all unit operations of power plant, comprise the data that Real-time Monitoring Data and off-line unit performance are tested; Data in database are periodically refreshed, and system deposits Useful Information in historical data base in after Real-time Monitoring Data is processed; Because data volume is huge, the data that deposit in historical data base all need compression, the convenience of while in order to inquire about, and the data of all previous test all have index, and index comprises machine group number, test data sheet explanation and test duration; User can carry out quick search according to index.
The benefit that deal with data is brought is like this exactly: 1, real-time query: the original sampling data of nearest 72 hours in real-time data base.Data in this database are deposited according to time sequencing, and user can inquire about according to the time.2, the inquiry of historical data: whole historical datas of inquiry generator excited system operation, comprise Real-time Monitoring Data and offline inspection and test result data.User can carry out quick search according to different index.3, logout: when accident appears in unit, complete the record of emergency review and deposit database in, user can enter database and carry out logout inquiry.4, alarm logging: the every real time data (comprising analog quantity, digital data) to monitoring is carried out real-time judgment, if occur, data are out-of-limit etc., and situation reports to the police, and deposit alarm logging in database, user can watch in real time the indication of reporting to the police on observation interface, also can enter the historical alarm logging of data base querying.
This system is utilized the pulse per second (PPS) Synchronous Sampling Pulse of GPS, be not more than ± 1 μ s of the synchronous error of sampling pulse; When synchronizing clock signals is lost or be abnormal, can maintain normal work; At synchronizing clock signals, lose in 30 minutes, phase angle measurement error is not more than 1 degree.
When this system PT/CT broken string, DC supply interruption, plant failure, communication abnormality, system is sent out alarm signal; House dog is set, when interference causes program to walk dead or power failure, makes system automatically recover normal work.
As shown in Figure 3, described generator excited system state wide area real-time acquisition system is measured generator three-phase voltage phasor based on gps time system synchronization, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal, generator built-in potential and the relevant real-time running datas of generator excited system such as merit angle, thereby Real-time Obtaining, record also externally provides and comprises that excitation becomes state, generating set state, adjuster state, power cell state, real time data and the historical data of the generator excited system correlation behaviors such as rotor and demagnetization state.
What more than enumerate is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar variations thereupon.If all distortion that those skilled in the art directly derives or associates from content disclosed by the invention, all should belong to protection scope of the present invention.
Claims (10)
1. a generator excited system state wide area real-time acquisition system, it is characterized in that, comprise: a data acquisition system (1), a data transmission system (2) and a data-storage system (3), described data acquisition system (1), by data transmission system (2) connection data storage system (3), transfers data to described data-storage system (3);
Wherein, described data acquisition system (1) comprising:
At least one GPS receiver module (11), it receives the temporal information of gps time system from gps satellite;
The intelligent electronic device measurement module (5) identical with a GPS receiver module quantity, with the described corresponding connection of a GPS receiver module (11), receives the temporal information of GPS receiver module (11) transmission with correspondence; The temporal information that described intelligent electronic device measurement module (5) basis receives, the status signal of synchro measure generator excited system, and export in real time target status signal while being with;
One data acquisition module (6), is connected with described intelligent electronic device measurement module (5), to receive the status signal of the generator excited system of each intelligent electronic device measurement module (5) transmission; Described data acquisition module (6) is also connected with described data transmission system (2);
Described data-storage system (3) comprising:
One the 2nd GPS receiver module (16), it receives the temporal information of gps time system from gps satellite;
One database server (9), it is connected with described the 2nd GPS receiver module (16), and described database server (9) provides a communication interface, by this communication interface, is connected with power-management centre (15), carries out exchanges data.
2. generator excited system state wide area real-time acquisition system according to claim 1, it is characterized in that: described data transmission system (2) comprises interconnective communication interface (7) and communication network (8), described communication interface (7) connection data acquisition system (1), with the output signal that receives described data acquisition system (1), described communication network (8) is connected with described data-storage system (3).
3. generator excited system state wide area real-time acquisition system according to claim 1, it is characterized in that, described data-storage system (3) also comprises a data memory module (10), and this data memory module (10) is connected with described database server (9).
4. generator excited system state wide area real-time acquisition system according to claim 1, it is characterized in that, the status signal of the generator excited system that intelligent electronic device measurement module (5) is measured comprises: three-phase voltage phasor, three-phase current phasor, active power, reactive power, system frequency, on-off state, non-alternating voltage current signal at least one of them.
5. generator excited system state wide area real-time acquisition system according to claim 4, is characterized in that, the status signal of described generator excited system also comprises: generator built-in potential and generator's power and angle.
6. generator excited system state wide area real-time acquisition system according to claim 1, it is characterized in that, described data-storage system (3) receives an a Remote triggering signal or triggering signal on the spot, to obtain data from data acquisition system (1).
7. according to the generator excited system state wide area real-time acquisition system described in claim 1 or 3, it is characterized in that, described data-storage system (3) adopts the method storage data of circulation storage between some high-speed caches.
8. generator excited system state wide area real-time acquisition system according to claim 7, it is characterized in that, the process of described data-storage system (3) storage data is: when generator system has fault, the data of retention fault front and back a period of time also start to upload to current high-speed cache, after end is uploaded, call next high-speed cache; When generator system fault-free, in the storage that circulates of current high-speed cache.
9. generator excited system state wide area real-time acquisition system according to claim 1, is characterized in that, the database server (9) of described data-storage system (3) comprises real-time data base and historical data base.
10. generator excited system state wide area real-time acquisition system according to claim 1, it is characterized in that, described database server (9) also provides a communication interface, by this communication interface, is connected with unit work station (12), carries out exchanges data.
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| CN107167733A (en) * | 2017-06-28 | 2017-09-15 | 国网上海市电力公司 | A kind of acquisition methods of the basal evaluation data of synchronous generator excited system performance |
| CN108320078A (en) * | 2018-03-12 | 2018-07-24 | 京能十堰热电有限公司 | A kind of power plant monitoring device timeliness index Test analysis method based on big data |
| CN109217963A (en) * | 2018-08-22 | 2019-01-15 | 合肥工业大学 | The time unifying method of the real-time phasor data of power distribution network Wide Area Measurement System |
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| CN107167733B (en) * | 2017-06-28 | 2019-07-23 | 国网上海市电力公司 | A kind of acquisition methods of the basal evaluation data of synchronous generator excited system performance |
| CN108320078A (en) * | 2018-03-12 | 2018-07-24 | 京能十堰热电有限公司 | A kind of power plant monitoring device timeliness index Test analysis method based on big data |
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| CN104104292B (en) | 2017-05-24 |
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