CN103178520B - Based on the method for SCADA data Real-Time Monitoring power oscillation of power system - Google Patents
Based on the method for SCADA data Real-Time Monitoring power oscillation of power system Download PDFInfo
- Publication number
- CN103178520B CN103178520B CN201310070909.XA CN201310070909A CN103178520B CN 103178520 B CN103178520 B CN 103178520B CN 201310070909 A CN201310070909 A CN 201310070909A CN 103178520 B CN103178520 B CN 103178520B
- Authority
- CN
- China
- Prior art keywords
- oscillation
- power
- alarm
- equipment
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention is a kind of method based on SCADA data Real-Time Monitoring power oscillation of power system.Include following steps: the real-time database interface 1) calling EMS system, what obtain power equipment has work value; 2) call oscillation characteristics iteration function, the basis of previous state inputs new data, certain grid equipment characteristic quantity swung back and forth of gaining merit is calculated, compares the state of rear Returning equipment with the definite value pre-set; 3) check the opposite equip. of local terminal whether to be also identified as oscillatory regime simultaneously, if so, then think that electric power system power oscillation occurs; 4) if system generation power oscillation, call the alarm interface of EMS system, send alarm.The present invention improves data accuracy, improves practical level, and greatly reduces investment outlay.It is a kind of convenient and practical method based on SCADA data Real-Time Monitoring power oscillation of power system.
Description
Technical field
The present invention is a kind of method based on SCADA data Real-Time Monitoring power oscillation of power system, belongs to the innovative technology of the method based on SCADA data Real-Time Monitoring power oscillation of power system.
Background technology
In electric power system, generator is when transmission line paired running is powered, the persistent oscillation between generator amature may be there is under some running status, cause power on busbar voltage and transmission line that corresponding vibration occurs simultaneously, have impact on the normal conveying of power, time serious, electric power system will lose the serious consequence of synchronizing direct to collapse.Because the frequency of this persistent oscillation is very low, generally between 0.1 ~ 2.5Hz, be usually referred to as low-frequency oscillation, because direct cause relates to waving between synchronous generator rotor, and show as the fluctuation of electric power, therefore be also called electromechanical oscillations or power oscillation.
How the stable and safety of power oscillation serious threat electrical network, be in operation and carry out real time monitoring to the generation of vibration and be significant.Solution in the past utilizes wide area measurement technology, namely use PMU(phasor measurement unit, phasor measurement unit) data carry out online dynamic security analysis, such as: use Prony algorithm directly to calculate the oscillation characteristicses such as the frequency of low-frequency oscillation of electric power system signal, amplitude, initial phase and decay, and then judge whether system low-frequency oscillation occurs.
PMU data monitoring power oscillation of power system is used to there is following problem and shortage in actual applications:
1) PMU layouts limited, and monitoring range is incomplete
SCADA (Supervisory Control And Data Acquisition, i.e. data acquisition and Monitor and Control) system, by being arranged on a kind of telemechanical device RTU (Remote Terminal Unit of power plant or transformer station, remote terminal unit) gather electric network data, be real-time monitoring system and the EMS(Energy Management System of current all power schedulings, EMS) data collection architecture that adopts of system.So, all plant stands of SCADA data cover EMS system access.
Contrary with RTU, PMU is not the conventional Christmas device that plant stand is built, need special deployment, the general plant stand being only deployed in stable problem and relatively giving prominence to, although recent domestic electrical system strengthens investment, accessed a large amount of PMU device, but PMU layouts limited, the problem that monitoring range is incomplete is still very outstanding.
2) safeguard not in place, data accuracy is not high
Because PMU is the optional equipment that remote data gathers, little on the impact of electrical network real time execution, operations staff's attention degree of end of stand is lower, and to the understanding of device, inadequate and operation exists deviation, often causes the problem of data.
Main website end is often through building special WAMS (Wide Area Measurement System, wide-area monitoring systems) system accesses PMU data, be difficult to integrated with EMS system, and these systems lack professional usually, Maintenance Difficulty is to put in place.
3) technical sophistication, practical difficulty is large
PMU needs deployment devices at station end, collection capacity can be obtained with the primary equipment connection side of plant stand, also need to set up special passage to be connected with main station system, be equivalent to the data collection architecture redeploying complete set, and main website also needs the special WAMS system of construction process data and analyze, technology is very complicated.
The applied analysis of main station system adopts comparatively complicated algorithm, the analysis and research of current research low-frequency oscillation are very many, but all must based on the integrality of data and accuracy, but just because of the disappearance of this respect causes various theory of algorithm finally cannot true(-)running, add system Consumer's Experience and integrated in existing problems, be often difficult to practical.
4) implementation cost is too high
Wide-area monitoring systems needs again to build data collection architecture, and plant stand needs special deployment PMU device, and main station system application is complicated, and implementation cost must be caused greatly to increase.
Summary of the invention
The object of the invention is to consider the problems referred to above and a kind of data accuracy that improves is provided, improving practical level, and the method based on SCADA data Real-Time Monitoring power oscillation of power system of greatly reducing investment outlay.
Technical scheme of the present invention is: the method based on SCADA data Real-Time Monitoring power oscillation of power system of the present invention, includes following steps:
1) call the real-time database interface of EMS system, what obtain power equipment has work value;
2) call oscillation characteristics iteration function, the basis of previous state inputs new data, certain grid equipment characteristic quantity swung back and forth of gaining merit is calculated, compares the state of rear Returning equipment with the definite value pre-set;
3) check the opposite equip. of local terminal whether to be also identified as oscillatory regime simultaneously, if so, then think that electric power system power oscillation occurs;
4) if system generation power oscillation, call the alarm interface of EMS system, send alarm.
Above-mentioned steps 1) described in power equipment comprise transmission line, generating set, transformer.
Above-mentioned steps 2) described in oscillation characteristics iteration function be a state iteration function.
Above-mentioned steps 2) described in equipment state comprise: starting of oscillation, vibrate, end of vibrating, normal.
Above-mentioned steps 3) in inspection be intended to get rid of the erroneous judgement that individual data acquisition problems causes.
Above-mentioned steps 4) in, if system generation power oscillation, call the alarm interface of EMS system, send voice, short message alarm.
Above-mentioned steps 4) in, during alarm, upper significant alarm window, called data bank interface, write alarm record and dependent event record, for analyzing the curve of event.
The present invention compared with prior art, has following beneficial effect:
1) the present invention uses SCADA data, and exploitation realizes the real time monitoring function of power oscillation of power system, solves the problem that WAMS system monitoring scope is incomplete, data accuracy is not high.
2) the present invention directly develops the real time monitoring function realizing power oscillation in EMS system, do not need data acquisition unit phasor measurement unit (PMU) and the WAMS (WAMS) of deployment-specific, namely power oscillation of power system Real-Time Monitoring can be realized, simplification technology realizes, improve practical level, and save great amount of investment.
3) mode of using state iteration function of the present invention, only need to use plant capacity currency can calculate plant capacity state, do not need the data preserving and process a time window, solve large-scale data in the past and preserve and sweeping scheme Problems existing.
4) the present invention only employs the most conventional RTU/SCADA data, covers the electrical network monitoring range of power dispatching station, power oscillation monitoring range is expanded to maximum, eliminates PMU device and to layout the blind spot entirely do not brought.
5) the technology of the present invention realizes simple and practical, can direct Application and Development in EMS system, and retrofit work amount is very little, adds that EMS system and data maintenance thereof are generally fairly proper, so this technology is easier to practical.
The present invention is a kind of convenient and practical method based on SCADA data Real-Time Monitoring power oscillation of power system.
Accompanying drawing explanation
Fig. 1 is oscillation characteristics iteration function flow chart of the present invention;
Fig. 2 be the method that the present invention is based on SCADA data Real-Time Monitoring power oscillation of power system realize schematic diagram.
Embodiment
Here is a preferred embodiment of the present invention, and features, objects and advantages of the invention can be found out from the explanation of embodiment and accompanying drawing.
1, this method discloses a kind of oscillation characteristics iteration function, is described as follows:
Fig. 1 is oscillation characteristics iteration function flow chart, this characteristic function is a state iteration function, the basis of previous state inputs new data, certain grid equipment characteristic quantity swung back and forth of gaining merit is calculated, compares the state of rear Returning equipment with the definite value pre-set.
The input of function: (P
k, t
k), wherein P
kbe equipment have work value, t
kmeasure the time gathered.
Judge current value whether extreme point,
P
k ’·P
k-1 ’<0 (1)
Wherein:
P
k ’=
If this point is extreme point, formula (2), formula (3) calculate the amplitude and cycle that swing:
H=P
m-P
m-1(2)
T=(t
m-t
m-1)*2 (3)
Wherein H is the amplitude swung, and T is the cycle swung.
H>=C in figure
haMP.AMp.Amp & T<=C
tjudge amplitude and the cycle whether out-of-limit, out-of-limit, this point is considered as vibrate extreme point, vibration extreme point counting i add 1.
Wherein C
hand C
tit is the limit value of setting.
I is the beautiful variable judging this equipment state quantity measurement, and it is normal that i is less than definite value, and i is greater than definite value and then represents and vibrating, if i equals definite value, represent starting of oscillation, vibration terminates or normally then returns 0.
Even if i reaches limit value, whether the slope of the axis that also must judge to vibrate is in limits, and to gain merit the mistake alarm drawing high suddenly and cause to filter similar unit, axis slope is such as formula shown in (4).
K
zd=(P
i-P
i-1)/(t
i-t
i-1) (4)
Wherein: K
zdaxis slope, P
ithat up-to-date extreme point is gained merit, P
i-1that the extreme point that starts to vibrate is gained merit, t
i, t
i-1it is the time that extreme point is corresponding.
The feature of oscillation characteristics iteration function is the data not needing a preservation time window, uses meritorious currency can return the state of corresponding device measurement, is very suitable for the scanning of large-scale data.Because only carry out calculating to the characteristic quantity measuring curve to judge and memory, system resource overhead is very little, and efficiency is very high, can by continuous iteration in real-time system, the current state that reflection equipment measures; This function is also applicable to the judgement of historical data curvilinear characteristic by established rule very much, and general analyzes equipment measures the situation of change in a period of time.
2, based on the method for SCADA data Real-Time Monitoring power oscillation of power system
The method application " oscillation characteristics iteration function " Application and Development in the real-time system of EMS, realize power oscillation of power system real time monitoring function, as shown in Figure 2, this functional realiey comprises five processes, be respectively peek, call, return, check confirm and send alarm.
(1) peek
Program is obtained generator table by SCADA real-time database interface, is exchanged the meritorious measurement currency of line end endpoint table, transformer table.The record number of a whole network equipment section may reach up to ten thousand even tens thousand of, and these records need to set enough memory headroom process, and small-scale application can pre-define allocation list by condition reduction equipment scope or manually.
(2) call
Input gain merit measuring value and current time of each equipment and call oscillation characteristics iteration function respectively, the meritorious curve of cyclical fluctuations characteristic value of computing equipment, thus judge the state of corresponding device, these characteristic sum states go on record, for next iteration.
(3) return
Oscillation characteristics iteration function returns the current state of each equipment successively, comprising: normal, starting of oscillation, vibrate, end of vibrating, these states are by the judgement of the whole system state after being used to and verification.
(4) judge
If the state of all devices belongs to normal, then electric power system is identified as normally, if the equipment that finds that there is belongs to oscillatory regime, then judges that electric power system there occurs vibration.
(5) alarm
Electrical network sends Real-time Alarm when there is vibration, comprising: voice, alarm window and short message alarm, simultaneously to oscillation event record warehouse-in, so that on-the-spot or consult curve and relative recording afterwards.
3, result verification
By the low-frequency oscillation real time monitoring program based on SCADA data that this method exploitation realizes, since within 2006, putting into operation in south electric network power scheduling control centre (south net is total to be adjusted) EMS system, low frequency each time
By the low-frequency oscillation real time monitoring program based on SCADA data that this method exploitation realizes, since within 2006, putting into operation in south electric network power scheduling control centre (south net is total to be adjusted) EMS system, low-frequency oscillation event each time all accurately sends alarm, as: 8.29 low-frequency oscillation events in 2006, 2.26 low-frequency oscillation events in 2007, 2008 4.21, 8.25 low-frequency oscillation event, 5.07 higher-order of oscillation events in 2010, 5.28 low-frequency oscillation, 9.24 low-frequency oscillation events in 2011, 11.19 low-frequency oscillation event, in the events such as 2.28 low-frequency oscillations in 2012, alarm is have issued in real time to dispatcher.
In sum, the present invention's technical characteristic is unlike the prior art:
1) before this, the realization of all supervision power oscillation of power system is all based on PMU data.The present invention uses SCADA data, designs the theoretical method being extracted power oscillation characteristic value by curvilinear characteristic, and exploitation achieves the real time monitoring function of power oscillation of power system, solves the problem that WAMS system monitoring scope is incomplete, data accuracy is not high.
2) the state iteration function of the present invention's proposition, this function only needs to use plant capacity currency can calculate plant capacity state rapidly, do not need the data preserving and process a time window, be very suitable for the scanning of large-scale equipment power status data, solve large-scale data in the past and preserve and sweeping scheme Problems existing.
3) method of the invention process, comprises peek, calls, returns, check confirmation and send alarm process, has considered the requirement identifying vibration and avoid reporting by mistake, technology realizes simple and practical, can direct Application and Development in EMS system, retrofit work amount is very little, is easier to practical.
Claims (2)
1., based on a method for SCADA data Real-Time Monitoring power oscillation of power system, it is characterized in that including following steps:
1) call the real-time database interface of EMS system, what obtain power equipment has work value;
2) call oscillation characteristics iteration function, the basis of previous state inputs new data, certain grid equipment characteristic quantity swung back and forth of gaining merit is calculated, compares the state of rear Returning equipment with the definite value pre-set;
3) check the opposite equip. of local terminal whether to be also identified as oscillatory regime simultaneously, if so, then think that electric power system power oscillation occurs;
4) if system generation power oscillation, call the alarm interface of EMS system, send alarm;
Above-mentioned steps 1) described in power equipment comprise transmission line, generating set, transformer;
Above-mentioned steps 2) described in oscillation characteristics iteration function be a state iteration function;
Above-mentioned steps 2) described in equipment state comprise: starting of oscillation, vibrate, end of vibrating, normal
Above-mentioned steps 3) in inspection be intended to get rid of the erroneous judgement that individual data acquisition problems causes;
Above-mentioned steps 4) in, if system generation power oscillation, call the alarm interface of EMS system, send voice, short message alarm.
2. the method based on SCADA data Real-Time Monitoring power oscillation of power system according to claim 1, is characterized in that above-mentioned steps 4) in, during alarm, upper significant alarm window, called data bank interface, write alarm record and dependent event record, for analyzing the curve of event.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310070909.XA CN103178520B (en) | 2013-03-06 | 2013-03-06 | Based on the method for SCADA data Real-Time Monitoring power oscillation of power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310070909.XA CN103178520B (en) | 2013-03-06 | 2013-03-06 | Based on the method for SCADA data Real-Time Monitoring power oscillation of power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103178520A CN103178520A (en) | 2013-06-26 |
| CN103178520B true CN103178520B (en) | 2015-09-30 |
Family
ID=48638204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310070909.XA Expired - Fee Related CN103178520B (en) | 2013-03-06 | 2013-03-06 | Based on the method for SCADA data Real-Time Monitoring power oscillation of power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103178520B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10134207B2 (en) * | 2017-04-20 | 2018-11-20 | Saudi Arabian Oil Company | Securing SCADA network access from a remote terminal unit |
| CN109347119B (en) * | 2018-09-21 | 2022-02-08 | 全球能源互联网欧洲研究院 | Virtual synchronous generator-based power grid low-frequency oscillation suppression method and device |
| US11288378B2 (en) | 2019-02-20 | 2022-03-29 | Saudi Arabian Oil Company | Embedded data protection and forensics for physically unsecure remote terminal unit (RTU) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917003A (en) * | 2010-07-29 | 2010-12-15 | 东南大学 | Small interference oscillatory stability decomposed model analysis method for electric power system |
| CN101944766A (en) * | 2010-06-01 | 2011-01-12 | 中国电力科学研究院 | Operation and safety monitoring simulation system for power system |
-
2013
- 2013-03-06 CN CN201310070909.XA patent/CN103178520B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944766A (en) * | 2010-06-01 | 2011-01-12 | 中国电力科学研究院 | Operation and safety monitoring simulation system for power system |
| CN101917003A (en) * | 2010-07-29 | 2010-12-15 | 东南大学 | Small interference oscillatory stability decomposed model analysis method for electric power system |
Non-Patent Citations (1)
| Title |
|---|
| 基于SCADA数据的实时监测电网低频振荡算法;梁寿愚等;《南方电网技术》;20071231;第1卷(第2期);第40-42页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103178520A (en) | 2013-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105337575B (en) | Photovoltaic plant status predication and method for diagnosing faults and system | |
| CN102856982B (en) | Enterprise energy consumption monitoring and management system | |
| CN104182902A (en) | Monitoring method based on centralized operation and maintenance system of dispatching data network | |
| CN103543403A (en) | Method for detecting primary frequency modulation capacity of power system units | |
| CN201984120U (en) | Electrical energy quality monitoring system | |
| CN103606057A (en) | System and method for monitoring power utilization service quality | |
| Sanchez et al. | Observability of low voltage grids: Actual DSOs challenges and research questions | |
| CN103178520B (en) | Based on the method for SCADA data Real-Time Monitoring power oscillation of power system | |
| CN203069670U (en) | Intelligent electric meter having function of monitoring power supply reliability and voltage qualified rate | |
| CN109599896A (en) | A kind of 10kV power grid distributed photovoltaic maximum can open the calculation method of capacity | |
| CN103018611B (en) | Non-invasive load monitoring method and system based on current decomposition | |
| CN102749593B (en) | Distributive power supply synchronization detection system and method | |
| CN105046011A (en) | Rapid analysis method used for state of electric device and based on topological computation of distributed power grid | |
| Bo et al. | Substation cloud computing for secondary auxiliary equipment | |
| CN103178519B (en) | The method of power oscillation of power system disturbing source is located in real time based on SCADA data | |
| CN103178521B (en) | Based on the method for SCADA historical data searching analysis power oscillation of power system disturbing source | |
| Joseph et al. | Stream computing framework for outage detection in smart grid | |
| Bai et al. | Frequency response of pv inverters toward high renewable penetrated distribution networks | |
| Refaat et al. | Big data impact on stability and reliability improvement of smart grid | |
| Aibin et al. | Reliability evaluation of distribution network with distributed generation based on latin hypercube sequential sampling | |
| CN104134167A (en) | Power-distribution-network state simulation and evaluation system based on mesh topology structure | |
| CN104636848A (en) | Project energy management contract system based on energy node control technology | |
| CN102946394B (en) | Based on the Power system dynamic process data compression transmission of waveform feature and reconstructing method in data acquisition analysis system | |
| CN202720323U (en) | Distributive power supply synchronization detection system | |
| CN114814402A (en) | Abnormal electricity utilization analysis method based on integrated electricity quantity and line loss system big data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180306 |