CN105811437A - Wide-area response-based transient stability online prejudgment system implementation method - Google Patents
Wide-area response-based transient stability online prejudgment system implementation method Download PDFInfo
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- CN105811437A CN105811437A CN201610242359.9A CN201610242359A CN105811437A CN 105811437 A CN105811437 A CN 105811437A CN 201610242359 A CN201610242359 A CN 201610242359A CN 105811437 A CN105811437 A CN 105811437A
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- 230000010354 integration Effects 0.000 claims abstract description 6
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a wide-area response-based transient stability online prejudgment system implementation method. The method comprises a master station judgment and control module, measurement modules, data concentrators and transient stability online prejudgment modules, wherein the measurement modules, the data concentrators and the transient stability online prejudgment modules are distributed on various sub-stations; the data concentrator of each sub-station carries out classification, integration and storage on electric quantity data measured by the measurement modules, packs the required data according to the requirements and transmits the data to nearby other sub-stations and the transient stability online prejudgment module of the sub-station in real time; the transient stability online prejudgment module of each sub-station judges whether the system in the region is unstable or not according to the measured data of the station and adjacent sub-stations, and transmits the judgment result to the main station; and the main station integrates the judgment results of the sub-stations to draw a final conclusion, and issues an operation command according to the final conclusion. According to the method, the transient stability reliability of the wide-area system can be improved and the system response speed can be improved.
Description
Technical field
Patent of the present invention relates to a kind of online anticipation network system realization of transient stability based on wide area response, belongs to wide area system transient stability anticipation analysis field.
Background technology
In the face of China's energy resources distribute serious unbalanced present situation, the interconnection of bulk power grid becomes the effective way solving this problem.The transient stability of the safe and stable operation of interacted system, especially interacted system plays vital effect to total system is safe and stable.If anticipation wide area power system stability accurately and rapidly, just the quality time can be won for the implementation of the generation of control strategy, stability contorting measure, thus effective guarantee electric power netting safe running.At present, the online anticipation system of traditional transient stability be mostly completed management by main website, storage, transient state are sentenced surely, the function such as decision-making, so cause main website workload big, error-prone, the online anticipation of transient stability expends time in longer, thus the rapidity responded does not reach requirement, it is difficult to ensure the safe and stable operation of interconnected power grid.
Summary of the invention
The purpose of the present invention, is in that to provide a kind of online anticipation network system realization of transient stability based on wide area response, its rapidity that can improve the online anticipation of wide area system transient stability and reliability, improves the response speed of system, reduce the data redundancy of main website.
For reaching above-mentioned purpose, the solution of the present invention is:
The electrical data that measurement module is recorded by each substation data concentrator is classified, integrates, is stored, as required by desired data packing the online anticipation module of transient stability being sent to other substations neighbouring and this substation in real time, transient stability online anticipation module in each substation judges in this region system whether unstability according to our station and the measurement data respectively closing on substation, and will determine that result passes to main website, main website comprehensive descision result issues operational order.
The online anticipation module of the measurement module of each substation, data concentrator and transient stability is integrated into a substation PMU module.Data concentrator receives the related electric amount information that measurement module records, under the synchronous clock pulse based on GPS-time reference controls, send into the microprocessor unit in the online anticipation module of transient stability, it adopts transient stability online anticipation program electric parameters is calculated and judges the stability of substation system, in judge process, the time reference of each amount all should based on the reference synchronization time of GPS.
The online pre-judging method adopted in transient stability online anticipation module is to be two machine systems by multi-computer system equivalence, utilizes power-angle oscillation center voltage track to judge.Its core utilizes oscillation center point voltage track to carry out area integral exactly, and concrete integral formula is as follows:
Wherein: A is integral area, VuFor integration starting voltage setting value, V (t) is the sampled voltage of t oscillation center point, and T is sampling time interval, t0It is VuThe corresponding time, tendThe time is terminated for integration.ENFor the equivalent electromotive force of electric power generator group, δ (t) is the merit angular difference of t two electric power generator group.
Excise the moment at short circuit grounding and corresponding failure, wait the potential change of valve system that voltage trace can be caused to undergo mutation.The Voltage Drop caused due to short circuit grounding is only relevant to the distance of trouble point to measuring point, and unrelated with fault severity level, in trouble duration, integral area is bigger, it is possible to cause Transient Instability to judge by accident.So in order to prevent erroneous judgement, in addition it is also necessary to increasing voltage constraints, computing formula is as follows:
The value of k in above formula, generally according to experience k=10.
When voltage meets above formula, system does not lose transient stability.When voltage is unsatisfactory for above formula and V (t) lower than VuTime, then carry out area integral, if integral area A is more than setting value Aset, then system loses transient stability, if integral area A is less than setting value AsetAnd 1s can be maintained, then system is in transient stability state.
After adopting such scheme, transient stability judge module is integrated in the PMU module of substation by the present invention, utilize new protocol mechanism to realize the monitor in real time of system transient modelling process and fast and stable judges and control, be different from conventional stationarity monitoring and regularly call the mode recording ripple；The measurement data intercommunication of substation data concentrator, transient stability online anticipation module can analyze the service data of this substation and close substation in real time, and the Transient Instability situation in region can be found in time；Data that the online anticipation module of transient stability processed to main website transmission and judged result, rather than the data of original measurement, decrease the volume of transmitted data on network, improve system response time, decrease the data redundancy of main website, improve power supply reliability.
Accompanying drawing explanation
Fig. 1 is the online anticipation system summary composition of transient stability based on wide area response
Fig. 2 is substation PMU module principle structure chart
Detailed description of the invention
Below with reference to accompanying drawing, technical scheme is described in detail.
The invention provides a kind of novel online anticipation system of transient stability based on wide area response as it is shown in figure 1, its implementation includes:
The electric quantity information such as phase angle, frequency, amplitude, as in figure 2 it is shown, the measurement module in the PMU of substation utilizes gps signal that on-site voltage, electric current, generator's power and angle etc. are carried out synchro measure, are uploaded to data concentrator by step (1).
Data, according to the markers in each data, are classified, are integrated, and store data in memory element by step (2) data concentrator.Need data packing according to different, the online anticipation module of transient stability of other substations and this substation near being sent in real time.By request transmission mode transmission between the data concentrator of each substation, arbitrary substation can send the order that request transmits to other substations, and requested substation is then organized by request, sent for information about.
This substation that the online anticipation module of transient stability of step (3) each substation transmits by judging data concentrator and the measurement data respectively closing on substation, it is judged that whether the state of power system unstability occurs in this region.In judge process, the time reference of each amount all should based on the reference synchronization time of GPS.
Adopt the transient stability online pre-judging method based on disturbed voltage trace that power system is carried out Transient Instability judgement.The method is to be two machine systems by multi-computer system equivalence, utilizes power-angle oscillation center voltage track to judge.Its core utilizes oscillation center point voltage track to carry out area integral exactly, and concrete integral formula is as follows:
Wherein: A is integral area, VuFor integration starting voltage setting value, V (t) is the sampled voltage of t oscillation center point, and T is sampling time interval, t0It is VuThe corresponding time, tendThe time is terminated for integration.ENFor the equivalent electromotive force of electric power generator group, δ (t) is the merit angular difference of t two electric power generator group.
Excise the moment at short circuit grounding and corresponding failure, wait the potential change of valve system that voltage trace can be caused to undergo mutation.The Voltage Drop caused due to short circuit grounding is only relevant to the distance of trouble point to measuring point, and unrelated with fault severity level, in trouble duration, integral area is bigger, it is possible to cause Transient Instability to judge by accident.So in order to prevent erroneous judgement, in addition it is also necessary to increasing voltage constraints, computing formula is as follows:
The value of k in above formula, generally according to experience k=10.
When voltage meets (2) formula, system does not lose transient stability.When voltage is unsatisfactory for (2) formula and V (t) lower than VuTime, then as formula (1) carries out area integral, if integral area A is more than setting value Aset, then system loses transient stability, if integral area A is less than setting value AsetAnd 1s can be maintained, then system is in transient stability state.
The judged result that the online anticipation module of step (4) main website comprehensive each substation transient stability transmits, based on the source of trouble in gps time signal judgement system, and cuts machine order to the transmission of each substation.
Compared with traditional online anticipation system of transient stability, transient stability judge process is put in the PMU of substation and is carried out by the present invention, decreases the workload of main website, improves response speed.The online anticipation system of traditional transient stability is all completed management by main website, storage, transient state are sentenced surely, the function such as decision-making, all measurement data are all processed by main website, and main website workload is big, error-prone, response speed is slower, it is difficult to ensure the long-term safety stable operation of interconnected power grid.Transient stability judge module is integrated in the PMU of substation by the present invention, utilizes new protocol mechanism to realize the monitor in real time of system transient modelling process and fast and stable judges and control, be different from conventional stationarity monitoring and regularly call the mode recording ripple；The measurement data intercommunication of substation data concentrator, transient stability online anticipation module can call the measurement data of this substation and close substation, and the Transient Instability in region is easier to be found；Data that the online anticipation module of transient stability processed to main website transmission and judged result, rather than the phasor data of original measurement, decrease the data transmission in network, improve system response time, decrease the data redundancy of main website.
Above example is only the technological thought that the present invention is described, it is impossible to limits protection scope of the present invention, every technological thought proposed according to the present invention, any change done on technical scheme basis with this, each falls within scope.
Claims (3)
1. the online anticipation network system realization of transient stability based on wide area response, it is characterised in that: the system architecture that method realizes includes being arranged on judging and controlling module and be distributed in the online anticipation module of the measurement module of each substation, data concentrator and transient stability of main website；
The electrical data that measurement module is recorded by the data concentrator in each substation is classified, integrates, is stored, as required by desired data packing the online anticipation module of transient stability being sent to other substations neighbouring and this substation in real time, transient stability online anticipation module in each substation judges in this region system whether unstability according to our station and the measurement data respectively closing on substation, and will determine that result passes to main website, judgement in main website draws final conclusion with controlling module synthesis each substation judged result, and issues operational order according to final conclusion.
2. as claimed in claim 1 a kind of based on wide area response the online anticipation network system realization of transient stability, it is characterised in that: the online anticipation module of the measurement module of each substation, data concentrator and transient stability is integrated into a substation PMU module；
Data concentrator receives the related electric amount information that measurement module records, under the synchronous clock pulse based on GPS-time reference controls, send into the microprocessor in the online anticipation module of transient stability, it adopts transient stability online anticipation program that electric parameters is calculated, and judges the stability of substation system；
In judge process, the time reference of each amount is based on the reference synchronization time of GPS.
3. as claimed in claim 2 a kind of based on wide area response the online anticipation network system realization of transient stability, it is characterized in that: the online pre-judging method in transient stability online anticipation module is specially, it is two machine systems by multi-computer system equivalence, utilizes power-angle oscillation center voltage track to judge.Its core is to utilize oscillation center point voltage track to carry out area integral, and integral formula is:
Wherein: A is integral area, VuFor integration starting voltage setting value, V (t) is the sampled voltage of t oscillation center point, and T is sampling time interval, t0It is VuThe corresponding time, tendTime, E is terminated for integrationNFor the equivalent electromotive force of electric power generator group, δ (t) is the merit angular difference of t two electric power generator group；
Increasing voltage constraints, computing formula is:
In above formula, k is parameter；
When voltage meets above formula, system does not lose transient stability；
When voltage is unsatisfactory for above formula and V (t) lower than VuTime, carry out area integral, if integral area A is more than setting value Aset, then system loses transient stability, if integral area A is less than setting value AsetAnd 1s can be maintained, then system is in transient stability state.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887905A (en) * | 2017-11-13 | 2018-04-06 | 广西大学 | The Electrical Power System Dynamic equipment synchronised clock control method measured based on PMU |
| CN107919666A (en) * | 2017-12-07 | 2018-04-17 | 贵州电网有限责任公司电力科学研究院 | A kind of area power grid transient stability based on wide area response is in line generalization pre-judging method |
| CN108181508A (en) * | 2018-01-10 | 2018-06-19 | 云南电网有限责任公司电力科学研究院 | A kind of method that synchronous phasor measurement unit big data is quickly handled |
| CN110867969A (en) * | 2019-11-28 | 2020-03-06 | 贵州电网有限责任公司 | Transient stability online prejudgment and optimization control system and method based on wide area response |
| CN111313544A (en) * | 2019-11-29 | 2020-06-19 | 国网天津市电力公司电力科学研究院 | Distributed unattended substation operation state analysis system |
| CN111478332A (en) * | 2020-04-02 | 2020-07-31 | 贵州电网有限责任公司 | Transient stability emergency control tripping fixed value online adjustment method based on conservative limit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458286A (en) * | 2008-12-30 | 2009-06-17 | 国家电网公司 | Phasor measuring set based on in situ spectroscopic analysis and applied wide domain measuring system |
| CN102522759A (en) * | 2011-12-13 | 2012-06-27 | 南方电网科学研究院有限责任公司 | Method for real-time discrimination of transient instability of power system based on voltage track after disturbance |
| CN205028069U (en) * | 2015-09-02 | 2016-02-10 | 南方电网科学研究院有限责任公司 | Prototype system for transient stability online prejudgment and real-time control of power system |
-
2016
- 2016-04-19 CN CN201610242359.9A patent/CN105811437A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458286A (en) * | 2008-12-30 | 2009-06-17 | 国家电网公司 | Phasor measuring set based on in situ spectroscopic analysis and applied wide domain measuring system |
| CN102522759A (en) * | 2011-12-13 | 2012-06-27 | 南方电网科学研究院有限责任公司 | Method for real-time discrimination of transient instability of power system based on voltage track after disturbance |
| CN205028069U (en) * | 2015-09-02 | 2016-02-10 | 南方电网科学研究院有限责任公司 | Prototype system for transient stability online prejudgment and real-time control of power system |
Non-Patent Citations (2)
| Title |
|---|
| 冯源 等: ""广域监控系统研究的新进展"", 《电力自动化设备》 * |
| 邓晖 等: ""基于受扰电压轨迹的电力系统暂态失稳判别（二）算例分析"", 《电力系统自动化》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887905A (en) * | 2017-11-13 | 2018-04-06 | 广西大学 | The Electrical Power System Dynamic equipment synchronised clock control method measured based on PMU |
| CN107919666A (en) * | 2017-12-07 | 2018-04-17 | 贵州电网有限责任公司电力科学研究院 | A kind of area power grid transient stability based on wide area response is in line generalization pre-judging method |
| CN107919666B (en) * | 2017-12-07 | 2020-11-17 | 贵州电网有限责任公司电力科学研究院 | Regional power grid transient stability online comprehensive prejudgment method based on wide area response |
| CN108181508A (en) * | 2018-01-10 | 2018-06-19 | 云南电网有限责任公司电力科学研究院 | A kind of method that synchronous phasor measurement unit big data is quickly handled |
| CN110867969A (en) * | 2019-11-28 | 2020-03-06 | 贵州电网有限责任公司 | Transient stability online prejudgment and optimization control system and method based on wide area response |
| CN111313544A (en) * | 2019-11-29 | 2020-06-19 | 国网天津市电力公司电力科学研究院 | Distributed unattended substation operation state analysis system |
| CN111313544B (en) * | 2019-11-29 | 2023-03-28 | 国网天津市电力公司电力科学研究院 | Distributed unattended substation operation state analysis system |
| CN111478332A (en) * | 2020-04-02 | 2020-07-31 | 贵州电网有限责任公司 | Transient stability emergency control tripping fixed value online adjustment method based on conservative limit |
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Application publication date: 20160727 |