CN1936607A - Wide-area power-angle monitoring method in electric net wide-area measuring system (WAMS) - Google Patents
Wide-area power-angle monitoring method in electric net wide-area measuring system (WAMS) Download PDFInfo
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Abstract
WAN angle surveillance methods to Wide Area Network Measurement System (WAMS), includes the following steps: Allocate priority to voltage phase angles of a number of plant equipments in power stations; the phase angles will be arranged in accordance with priority and form groups; definite effectiveness dead radio for the phase angle of each group. It will be validity when phase angle is described lower than effectiveness dead radio value; designate at least one reference voltage phase angle of reference point as reference phase angle or phase angle group, calculate the margin between effective phase angle and the reference phase angle or referred group phase and get angle value; show the angle value above the monitoring interface.
Description
Technical field
The present invention relates to a kind of dispatching automation of electric power systems field, particularly relate in a kind of dynamic security observation process the method that the wide area merit angle based on geographic map monitors.
Background technology
, transferring electricity from the west to the east contradiction interconnected along with big electrical network shows especially day by day, and electrical network is faced with more and more new challenges, and the stability analysis of operation and supervision also more and more seem important.Synchronized phasor measurement technology and Modern High-Speed digital communication network realize that for us the on-line monitoring of electrical network dynamic process provides technical support and assurance.Electrical network wide area real-time dynamic monitoring system realizes accurately catching the technological means of electrical network dynamic process under the situations such as the online fault disturbance of electric system, low-frequency oscillation and artificial test.Synchronous phasor measurement unit (Phasor Measurement Unit, PMU) provide the whole network sampling and the phasor data of calculating for system, be sent to the monitoring system main website in real time by power dispatch data network, make the yardman can in time understand the multidate information of electrical network in the dispatching center.
The cover dispatch automated system that electrical network WAMS (hereinafter to be referred as WAMS) is made up of the monitoring main website of PMU and dispatching center.This system can provide the dynamic process of operation of power networks for yardman and operating analysis personnel.So far, power network schedule automation had EMS stable state, WAMS dynamically, the transient state three-state data of protection and failure information system.The supervision of electrical network and control technology development reach a new level again.
Although the dispatching automation technology has developed a lot of years, various dispatching and monitoring means and technology emerge in an endless stream,, still be a brand-new technology for the dynamic surveillance of WAMS system.Phase angles such as the voltage phase angle of WAMS, electric current phase angle, generator built-in potential phase angle become WAMS and distinguish over one of sign of other system, and, how to monitor phase angle, how the operation of the variation of phase angle and electrical network and control are combined, need progressively accumulation in production run and scientific and technical research.Therefore, how to represent the merit angle of system better, and to switch Reference Phase Angle easily be current matter of utmost importance, the condition that must understanding is provided and monitor for the management and running personnel by strong supervision means, thereby, really phase angle is applied in production run and the control and goes.Phase angle proposed by the invention is equipped with and the Reference Phase Angle modification method mutually, is the new trial of being done on operation use experience accumulation basis.
Summary of the invention
The objective of the invention is in order on yardman's monitoring interface, to show the merit angle easily, and guarantee when realizing that the wide area geographic map monitors the merit angle, not throwing to move back because of individual device makes the merit angle, factory station that shows stop transport, simultaneously, propose Reference Phase Angle manual correction and automatic correcting method, guide direction for scheduling merit angle monitors.
To achieve these goals, the present invention proposes the notion of " phase angle group ".The phase angle group is meant voltage phasor (or electric current phasor, generally more the be concerned about voltage phasor) combination that phase angle is according to priority arranged of a plurality of equipment in factory of electric system station, and the merit angle during the merit angle monitors then is the difference of effective phase angle with respect to Reference Phase Angle.In wide area merit angle monitors, be background with the geographical wiring diagram of electrical network usually, show merit angle, factory station at each factory station location place, final, monitor that from whole map each merit angle, factory station distributes.In this case, the merit angle that factory station location place shows can only have one, and in a factory station, the voltage of all devices all can have a phase angle, these phase angles can both be represented this factory station (the factory station is inner except that the special method of operation of minority, and phase angle difference is very little).Therefore, correctly merit angle, expression factory station on geographic map just can not be adopted a simple phase angle, and should is one group of phase angle, and we are referred to as " phase angle group ", and this notion should become the basic noun of WAMS.
Wide area merit angle monitoring method in the electrical network WAMS of the present invention (WAMS) may further comprise the steps: distribute priority for the voltage phasor phase angle of a plurality of equipment in factory station of electric system; All phase angles are according to priority arranged, formed the phase angle group; For each the phase angle definition validity dead band value in the phase angle group,, judge that then described phase angle is invalid if described angle values is lower than described dead band value; At least one voltage phase angle of specified reference point calculates the difference of effective phase angle with respect to described Reference Phase Angle or Reference Phase Angle group as reference phase angle or Reference Phase Angle group, obtains merit angle value; And show that on monitoring interface described merit angle is worth.
The present invention takes into full account Reference Phase Angle in operating effect of dispatching of power netwoks and use habit, proposes the Reference Phase Angle manual correction and revises two kinds of methods automatically.
For the Reference Phase Angle manual correction, a kind of simple operations method of oriented manipulation is proposed.This method is implemented as follows: switch on monitoring interface and revise the Reference Phase Angle operation; Click selected Reference Phase Angle or phase angle group; Described clicked phase angle or phase angle group are set to Reference Phase Angle or Reference Phase Angle group.
Automatically revise for Reference Phase Angle, propose a kind of at the known automatic correction phase angle method of operating that is equipped with contextual definition mutually of management and running.The specific implementation method is as follows: define a series of Reference Phase Angle that may select, form the Reference Phase Angle group; According to the priority of Reference Phase Angle, definition possesses the phase angle that is equipped with relation mutually to the Reference Phase Angle group; Be each phase angle definition validity criterion in the Reference Phase Angle group, the value defined validity dead band value of each criterion, when the absolute value of criterion during less than corresponding dead band value, phase angle is judged to invalid; It is current Reference Phase Angle that the highest effective phase angle of priority is set.
The merit angle monitoring method that the present invention proposes can monitor electrical network merit angle and play directive significance, be a kind of fairly simple and practical solution.
Description of drawings
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is a phase angle group physical representation synoptic diagram;
Fig. 2 is a phase angle group structural representation;
Fig. 3 is a Reference Phase Angle manual correction synoptic diagram;
Embodiment
Fig. 1 is a phase angle group physical representation synoptic diagram.As shown in Figure 1, shown that on geographic map each department or factory station location place putting several phase angles, the phase angle difference between phase angle 2 and the phase angle 1 can reflect that the trend between 2 flows to, size, angle stability or the like electrical network characteristic.But, what reflect on the map of Fig. 1 all is phase angle of each point, in fact, phase angle 2 may be certain 500kV factory station, there are equipment such as transformer, circuit in factory in the station, and any one equipment all may enter stops transport or inspecting state, at this moment, if use the voltage phase angle of this equipment to be presented on the map, be nonsensical.Therefore, can not represent with a phase angle simply at each point places such as phase angle 1, phase angles 2, and should be the phase angle group.Fig. 2 has expressed the attribute and the define method of phase angle group.
During the definition of phase angle group, realize phase angle with certain priority, and only show effective phase angle just to possess the setting and the judgement of priority and two attributes of distinguishing validity.
When specific implementation, need consider respectively two attributes:
1) sets up priority number, the contained phase angle of phase angle group according to priority is numbered.
2) set up phase angle validity criterion, phase angle is specified a validity criterion.For measuring system, if do not handle, when equipment is stopped transport, often contain " drift " in the measured value, be not definitely to equal zero, drift sometimes still is a bigger value.In order to ensure the reliability of criterion, also should add a dead band value to criterion.When reality was judged, the value that needs only the validity criterion was less than dead band value, and then current phase angle is invalid.
The form of Fig. 2 (a) has been expressed the necessary several elements of phase angle group, comprises phase angle, phase angle validity criterion, phase angle validity criterion dead band, four parts of priority.Only define this four elements, could realize intactly that phase angle is equipped with mutually according to certain priority.Fig. 2 (b) has expressed four phase angles and the relation thereof of the phase angle group of phase angle group 1 correspondence.Phase angle 1-1,1-2,1-3,1-4 are four phase angles in the phase angle group 1, and they have the validity criterion of oneself, select any one phase angle (as phase angle 1-3), move, move down operation on it is carried out and can change its priority.
Reference Phase Angle is meant the voltage phase angle of the reference point of appointment in electrical network monitors.In electrical network, the phase angle of seeing certain voltage phasor is nonsensical isolatedly, has only the relative phase angle of strange land phasor to be of practical significance to stabilization of power grids supervision and analysis.Reference Phase Angle is exactly a phase angle in fact, and it also can be one group and have the phase angle that is equipped with relation mutually, that is to say that the phase angle group also can be used as Reference Phase Angle, is referred to as the Reference Phase Angle group here.In use, the value itself of phase angle (group) and Reference Phase Angle (group) can not be changed, and just in the monitoring image of merit angle, shows the difference (merit angle value) of the two.
The Reference Phase Angle correction can be divided into manual correction and revise dual mode automatically.On the wide area geographic map, showing merit angle, many factories station, according to the different methods of operation, perhaps different supervision contents, supervision custom, may select the Reference Phase Angle of different phase angles as the whole network, in this case, the simple manual correction of possible operation is practical.And under the another kind of situation, possible management and running personnel acquiescence is exactly to select certain equipment phase angle at certain factory station as the reference angle, after this equipment is stopped transport, also knows another designated equipment phase angle of this usefulness as the reference angle, and at this moment, phase angle is revised just practical automatically.
The specific implementation method is as follows:
I. manual correction Reference Phase Angle:
Method used in the present invention is first selection operation, and current operation is changed to the selection Reference Phase Angle, with corresponding phase angle under the mouse point or phase angle group, just can finish the Reference Phase Angle correction then, and all operations (contain and switch to normal mode) needs three clicks altogether.
Fig. 3 is the operation chart (the Reference Phase Angle automatic correcting method is similar to definition and the process of Fig. 2) of Reference Phase Angle manual correction method.The operation of selecting to revise Reference Phase Angle from operating personnel only needs three operations to finishing the Reference Phase Angle correction.
1) selects Reference Phase Angle correction operation;
2) click phase angle or the phase angle group of expecting;
3) end operation;
II. revise Reference Phase Angle automatically:
Normal conditions, manual correction Reference Phase Angle should be the first-selections that management and running monitor.But when the very definite Reference Phase Angle of operations staff is equipped with order mutually, when wishing to revise automatically again, we can be pre-defined as the phase angle group with reference to point, i.e. Reference Phase Angle group realizes that reference angle revises automatically.According to the priority of Reference Phase Angle, definition possesses the phase angle that is equipped with relation mutually to the Reference Phase Angle group.In actual motion, the effective phase angle that priority is the highest will be changed to current Reference Phase Angle.Concrete steps are as follows:
1) a series of Reference Phase Angle that may select of definition are formed the Reference Phase Angle group;
2) according to certain priority, definition possesses the phase angle that is equipped with relation mutually to the Reference Phase Angle group;
3) be each phase angle definition validity criterion in the Reference Phase Angle group, the value defined validity dead band of each criterion, when the absolute value of criterion during less than corresponding dead band, phase angle is judged to invalid;
4) the final the highest effective phase angle of priority is changed to current Reference Phase Angle.
More than describe the specific embodiment of the present invention in detail.And scope of the present invention should not be limited to these descriptions.Any modification, improvement in principle of the invention scope all belongs to protection scope of the present invention.
Claims (3)
1, the wide area merit angle monitoring method in the electrical network WAMS (WAMS) may further comprise the steps:
Distribute priority for the voltage phasor phase angle of a plurality of equipment in factory station of electric system;
All phase angles are according to priority arranged, formed the phase angle group;
For each the phase angle definition validity dead band value in the phase angle group,, judge that then described phase angle is invalid if described angle values is lower than described dead band value;
At least one voltage phase angle of specified reference point calculates the difference of effective phase angle with respect to described Reference Phase Angle or Reference Phase Angle group as reference phase angle or Reference Phase Angle group, obtains merit angle value; And
On monitoring interface, show described merit angle value.
2, wide area merit angle monitoring method according to claim 1, wherein said Reference Phase Angle is made amendment by manual methods, may further comprise the steps:
On monitoring interface, switch to and revise the Reference Phase Angle operation;
Click selected Reference Phase Angle or phase angle group;
Described clicked phase angle or phase angle group are set to Reference Phase Angle or Reference Phase Angle group.
3, wide area merit angle monitoring method according to claim 1, wherein said Reference Phase Angle is made amendment by automatic correcting method, may further comprise the steps:
Define a series of Reference Phase Angle that may select, form the Reference Phase Angle group;
According to the priority of Reference Phase Angle, definition possesses the phase angle that is equipped with relation mutually to the Reference Phase Angle group;
Be each phase angle definition validity criterion in the Reference Phase Angle group, the value defined validity dead band value of each criterion, when the absolute value of criterion during less than corresponding dead band value, phase angle is judged to invalid;
It is current Reference Phase Angle that the highest effective phase angle of priority is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101500556A CN100561237C (en) | 2006-10-25 | 2006-10-25 | Wide area merit angle monitoring method in the electrical network WAMS (WAMS) |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101500556A CN100561237C (en) | 2006-10-25 | 2006-10-25 | Wide area merit angle monitoring method in the electrical network WAMS (WAMS) |
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| CN1936607A true CN1936607A (en) | 2007-03-28 |
| CN100561237C CN100561237C (en) | 2009-11-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595596C (en) * | 2007-12-12 | 2010-03-24 | 北京四方继保自动化股份有限公司 | Dynamic data compression storage method in electric network wide-area measuring systems (WAMS) |
| CN101458286B (en) * | 2008-12-30 | 2011-07-13 | 国家电网公司 | Phasor measuring set based on in situ spectroscopic analysis and applied wide domain measuring system |
| CN102194058A (en) * | 2011-05-16 | 2011-09-21 | 中国电力科学研究院 | Wide-area-measurement-system (WAMS)-based power grid safety and stability visualization method |
-
2006
- 2006-10-25 CN CNB2006101500556A patent/CN100561237C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595596C (en) * | 2007-12-12 | 2010-03-24 | 北京四方继保自动化股份有限公司 | Dynamic data compression storage method in electric network wide-area measuring systems (WAMS) |
| CN101458286B (en) * | 2008-12-30 | 2011-07-13 | 国家电网公司 | Phasor measuring set based on in situ spectroscopic analysis and applied wide domain measuring system |
| CN102194058A (en) * | 2011-05-16 | 2011-09-21 | 中国电力科学研究院 | Wide-area-measurement-system (WAMS)-based power grid safety and stability visualization method |
| CN102194058B (en) * | 2011-05-16 | 2015-09-23 | 中国电力科学研究院 | Based on the electricity net safety stable method for visualizing of WAMS WAMS |
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| Publication number | Publication date |
|---|---|
| CN100561237C (en) | 2009-11-18 |
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Effective date of registration: 20171226 Address after: 100085 Beijing city on the base of the information industry on the street, No. four, No. 9, Haidian District Co-patentee after: Beijing Sifang Jibao Engineering Technology Co., Ltd. Patentee after: Beijing Sifang Jibao Automation Co., Ltd. Address before: 100085 Beijing city on the base of the information industry on the street, No. four, No. 9, Haidian District Patentee before: Beijing Sifang Jibao Automation Co., Ltd. |
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