CN104348255A - Power abnormity warning method for measuring and control device of substation - Google Patents
Power abnormity warning method for measuring and control device of substation Download PDFInfo
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- CN104348255A CN104348255A CN201410672244.4A CN201410672244A CN104348255A CN 104348255 A CN104348255 A CN 104348255A CN 201410672244 A CN201410672244 A CN 201410672244A CN 104348255 A CN104348255 A CN 104348255A
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- phase
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
Abstract
The invention relates to a power abnormity warning method for a measuring and control device of a substation. The power abnormity warning method comprises the following steps: setting threshold current I0 and threshold voltage U0; making a forwarding table in a monitoring host at a substation side and a remote monitoring center host; acquiring A-phase current Ia, B-phase current Ib and C-phase current Ic as well as A-phase voltage Ua, B-phase voltage Ub and C-phase voltage Uc by using the measuring and control device; judging whether the A-phase current Ia is greater than the threshold current I0 or not, if the A-phase current Ia is not greater than the threshold current I0, rejudging, if the A-phase current Ia is greater than the threshold current I0, continuously judging the B-phase current Ib and the C-phase current Ic; if the B-phase current Ib and the C-phase current Ic are greater than the threshold current I0, continuously judging the A-phase voltage Ua, the B-phase voltage Ub and the C-phase voltage Uc; if the A-phase voltage Ua, the B-phase voltage Ub and the C-phase voltage Uc are greater than the threshold voltage U0, continuously judging the total power P; sending a line power abnormity warning message to a monitoring computer and a monitoring host in the substation, sending a corresponding message to the remote monitoring center host through the forwarding table by using the monitoring host at the substation side, and continuing the next judgment. The power abnormity warning can be realized, which two voltage phase sequences are wrong can be displayed, and the phase difference of wrong phase sequences can be prompted.
Description
Technical field
The present invention relates to a kind of transformer station measurement and control device power abnormal alarm method.
Background technology
Measure and control device in monitoring system of electric substation can gather the analog quantity of the current/voltage of each circuit in transformer station; and can be converted on the supervisory control comuter of actual numerical value in transformer station and carry out Real-Time Monitoring, monitoring information comprises circuit A phase current Ia, circuit B phase current Ib, circuit C phase current Ic; A phase voltage Ua, circuit B phase voltage Ub, circuit C phase voltage Uc, angle between Ua and Ia
Ψ a,angle between Ub and Ib
Ψ b,angle between Uc and Ic
Ψ c, as shown in Figure 1.measure and control device in monitoring system of electric substation can go out each phase power of circuit according to the electric current collected and voltage and the angle calcu-lation between them, comprising, A phase power P a=Ua Ia COS
Ψ a, circuit B phase power P b=Ub Ib COS
Ψ b, circuit C phase power P c=Uc IcCOS
Ψ c.
under circuit normal operating condition, three-phase voltage balances, three-phase balance, and relation is as follows:
namelyua=Ub=Uc
Ia= Ib = Ic
Ψa=
Ψb=
Ψc
thereforepa=Pb=Pc
And supervisory control comuter in transformer station shows gross power P, P=Pa+Pb+Pc=3P.
The electric current that measure and control device in transformer station gathers and voltage are vectors, have the attribute of size and Orientation.Generally by voltage transformer summation current transformer, the voltage and current of reality is transformed into measure and control device in transformer station, the lower voltage and current proportional with actual value that can gather, voltage and current after transformation still has the attribute of size and Orientation, by cable, the low-voltage after transformation and low current are linked into measure and control device, measure and control device removes the numerical value such as rated output according to the voltage and current of access again.
Because electric current and voltage have the attribute of size and Orientation, therefore, when occurring that electric current and voltage do not access the situation of measure and control device according to correct order, line power can be caused abnormal, affect and the electricity of supply line is calculated, cause economic loss.As worked as B phase, C phase voltage phase sequence is contrary, and as shown in Figure 2, the power calculation process of its correspondence is as follows:
suppose Ψ a=
Ψ b=
Ψ c=30 °
as can be seen from Figure: Ub Uc is anti-phase
now:
Pa=UaIacos30
°=P (right value)
Pb=UbIbcos270
°=0
Pc=UcIccos150
° = -P
p is total=P+0+ (-P)=0
Now power is zero, does not walk electricity after power supply, and the electricity having a strong impact on supply line calculates.
Original monitor mode only can monitor Ua, Ub, Uc, Ia, Ib, Ic,
Ψ a,
Ψ b,
Ψ,the data such as Pa, Pb, Pc, P, can not send power abnormal alarm.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of transformer station measurement and control device power abnormal alarm method
,according to the data that the measure and control device in monitoring system of electric substation can collect, take corresponding Logic judgment, realize power abnormal alarm, and which two voltage phase sequence mistake can demonstrate be.
In order to solve above-mentioned purpose, the technical solution used in the present invention is:
Transformer station measurement and control device power abnormal alarm method, its step is as follows:
1, setting threshold electric current I 0 and threshold voltage U0, described threshold current I0 and threshold voltage U0 is respectively 0.5% of line current rated value and line voltage distribution rated value;
2, transmit at transformer substation side monitoring host computer and the formulation of remote monitoring central host, " line power abnormal alarm ", " warning of A, B phase voltage inverted sequence ", " warning of A, B phase voltage inverted sequence " and " warning of A, B phase voltage inverted sequence " 4 signal continuous arrangements are being transmitted on corresponding point for subsequent use;
3, A phase current Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltage Ub and C phase voltage Uc is gathered by measure and control device;
4, judge whether A phase current Ia is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge B phase current Ib;
5, judge whether B phase current Ib is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge C phase current Ic;
6, judge whether C phase current Ic is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge A phase voltage Ua;
7, judge whether A phase voltage Ua is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge B phase voltage Ub;
8, judge whether B phase voltage Ub is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge C phase voltage Uc;
9, judge whether C phase voltage Uc is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge gross power P;
10, judge whether gross power P equals zero, if be not equal to, rejudge, if equaled, then produce message by measure and control device, and send line power abnormal alarm message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
11, judge whether Pa is not equal to UaIa Ψ a, if be not equal to, then produce message by measure and control device, and send " warning of B, C phase voltage inverted sequence " message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
12, judge whether Pb is not equal to UbIb Ψ b, if be not equal to, then produce message by measure and control device, and to supervisory control comuter in transformer station and monitoring host computer send " " warning of A, B phase voltage inverted sequence " message; send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step and judge; If equaled, then send A, C phase voltage inverted sequence and report to the police.
Beneficial effect of the present invention: owing to having faradic existence between each circuit in transformer station, under the state of therefore line outage, measure and control device still can induce smaller electric current and voltage value, should not send warning under this power down mode, therefore will first remove this kind of state.The present invention, by setting threshold current value and magnitude of voltage, is set to I0 and U0.That is, when current value and magnitude of voltage are greater than I0 and U0 respectively, think that circuit has electricity, start to judge that whether power is abnormal, when current value and magnitude of voltage are less than I0 and U0 respectively, think that circuit is without electricity, do not go to judge that whether power is abnormal, to improve judgment accuracy.According to the data that the measure and control device in monitoring system of electric substation can collect, take corresponding Logic judgment, realize power abnormal alarm, and to demonstrate be which two voltage phase sequence mistake (generally to realize voltage identical with the phase sequence of electric current by changing the voltage phase sequence of mistake).Power abnormal alarm can be sent in time, avoid electric energy tariff mistake.The separate of phase sequence mistake can also be pointed out when occurring abnormal, helping attendant quick and precisely to process exception.
Accompanying drawing explanation
Fig. 1 is that electric current and voltage are according to phase diagram during correct order access;
Fig. 2 is that electric current and voltage do not have according to phase diagram during correct order access;
Fig. 3 is decision logic figure of the present invention.
Embodiment
As shown in Figure 3, transformer station measurement and control device power abnormal alarm method, its step is as follows:
1, setting threshold electric current I 0 and threshold voltage U0, described threshold current I0 and threshold voltage U0 is respectively 0.5% of line current rated value and line voltage distribution rated value;
2, transmit at transformer substation side monitoring host computer and the formulation of remote monitoring central host, " line power abnormal alarm ", " warning of A, B phase voltage inverted sequence ", " warning of A, B phase voltage inverted sequence " and " warning of A, B phase voltage inverted sequence " 4 signal continuous arrangements are being transmitted on corresponding point for subsequent use;
3, A phase current Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltage Ub and C phase voltage Uc is gathered by measure and control device;
4, judge whether A phase current Ia is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge B phase current Ib;
5, judge whether B phase current Ib is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge C phase current Ic;
6, judge whether C phase current Ic is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge A phase voltage Ua;
7, judge whether A phase voltage Ua is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge B phase voltage Ub;
8, judge whether B phase voltage Ub is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge C phase voltage Uc;
9, judge whether C phase voltage Uc is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge gross power P;
10, judge whether gross power P equals zero, if be not equal to, rejudge, if equaled, then produce message by measure and control device, and send line power abnormal alarm message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
11, judge whether Pa is not equal to UaIa Ψ a, if be not equal to, then produce message by measure and control device, and send " warning of B, C phase voltage inverted sequence " message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
Judge whether Pb is not equal to UbIb Ψ b, if be not equal to, then produce message by measure and control device, and to supervisory control comuter in transformer station and monitoring host computer send " " warning of A, B phase voltage inverted sequence " message; send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step and judge; If equaled, then send A, C phase voltage inverted sequence and report to the police.
Claims (1)
1. transformer station measurement and control device power abnormal alarm method, is characterized in that step is as follows:
Setting threshold electric current I 0 and threshold voltage U0, described threshold current I0 and threshold voltage U0 is respectively 0.5% of line current rated value and line voltage distribution rated value;
Formulate at transformer substation side monitoring host computer and remote monitoring central host and transmit, " line power abnormal alarm ", " warning of A, B phase voltage inverted sequence ", " warning of A, B phase voltage inverted sequence " and " warning of A, B phase voltage inverted sequence " 4 signal continuous arrangements are being transmitted on corresponding point for subsequent use;
A phase current Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltage Ub and C phase voltage Uc is gathered by measure and control device;
Judge whether A phase current Ia is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge B phase current Ib;
Judge whether B phase current Ib is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge C phase current Ic;
Judge whether C phase current Ic is greater than threshold current I0, if be not more than, rejudges, if be greater than, continue to judge A phase voltage Ua;
Judge whether A phase voltage Ua is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge B phase voltage Ub;
Judge whether B phase voltage Ub is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge C phase voltage Uc;
Judge whether C phase voltage Uc is greater than threshold voltage U0, if be not more than, rejudge, if be greater than, continue to judge gross power P;
Judge whether gross power P equals zero, if be not equal to, rejudge, if equaled, then produce message by measure and control device, and send line power abnormal alarm message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
Judge whether Pa is not equal to UaIa Ψ a, if be not equal to, then produce message by measure and control device, and send " warning of B, C phase voltage inverted sequence " message to supervisory control comuter in transformer station and monitoring host computer, send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step judgement;
Judge whether Pb is not equal to UbIb Ψ b, if be not equal to, then produce message by measure and control device, and to supervisory control comuter in transformer station and monitoring host computer send " " warning of A, B phase voltage inverted sequence " message; send corresponding message by transformer substation side monitoring host computer by transmitting distally centralized control center's main frame again, and continue next step and judge; If equaled, then send A, C phase voltage inverted sequence and report to the police.
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| CN201410672244.4A CN104348255B (en) | 2014-11-22 | 2014-11-22 | Transformer station measurement and control device power abnormal alarm method |
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| CN201410672244.4A CN104348255B (en) | 2014-11-22 | 2014-11-22 | Transformer station measurement and control device power abnormal alarm method |
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| CN104348255B CN104348255B (en) | 2017-03-15 |
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Cited By (1)
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| CN105334385A (en) * | 2015-09-16 | 2016-02-17 | 国网辽宁省电力有限公司锦州供电公司 | Transformer station measured data abnormity warning method |
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| US20110188159A1 (en) * | 2008-09-24 | 2011-08-04 | Abb Research Ltd. | Method and device for supervising secondary circuit of instrument transformer in power system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334385A (en) * | 2015-09-16 | 2016-02-17 | 国网辽宁省电力有限公司锦州供电公司 | Transformer station measured data abnormity warning method |
| CN105334385B (en) * | 2015-09-16 | 2018-10-12 | 国网辽宁省电力有限公司锦州供电公司 | Substation's continuous data abnormal alarm method |
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| CN104348255B (en) | 2017-03-15 |
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