CN104348255B - Transformer station measurement and control device power abnormal alarm method - Google Patents
Transformer station measurement and control device power abnormal alarm method Download PDFInfo
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- CN104348255B CN104348255B CN201410672244.4A CN201410672244A CN104348255B CN 104348255 B CN104348255 B CN 104348255B CN 201410672244 A CN201410672244 A CN 201410672244A CN 104348255 B CN104348255 B CN 104348255B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 title claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 46
- 101100471685 Caenorhabditis elegans ubq-2 gene Proteins 0.000 claims description 3
- 238000000819 phase cycle Methods 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 description 6
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- 238000004364 calculation method Methods 0.000 description 2
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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
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Abstract
Transformer station measurement and control device power abnormal alarm method, its step are as follows：Given threshold electric current I0 and threshold voltage U0；Forward table is formulated in transformer substation side monitoring host computer and remote monitoring central host；A phase currents Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltage Ub and C phase voltages Uc are gathered by measure and control device；Judging, A phase currents Ia, whether more than threshold current I0, is rejudged if being not more than, B phase current Ib, C phase current Ic judged if greater than then continuation；A phase voltage Ua, B phase voltage Ub, C phase voltages Uc are judged if greater than continuation；General power P is judged if greater than continuation；And monitoring computer and monitoring host computer send line power abnormal alarm message into transformer station, then by forward table, distally centralized control center's main frame sends corresponding message by transformer substation side monitoring host computer, and continues next step judgement.Achievable power abnormal alarm, and any two voltage phase sequence mistakes can be shown, moreover it is possible to point out the separate of phase sequence mistake.
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 monitoring computer of the actual numerical value in transformer station carries out real-time monitoring, and monitoring information includes circuit A phases
Electric current Ia, circuit B phase current Ib, circuit C phase current Ic；A phase voltages Ua, circuit B phase voltages Ub, circuit C phase voltages Uc, Ua and
Angle Ψ a between Ia, angle Ψ b between Ub and Ib, angle Ψ c between Uc and Ic, as shown in Figure 1.Observing and controlling in monitoring system of electric substation
Device can go out each phase power of circuit according to the electric current and voltage and the angle calcu-lation between them for collecting, including 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 is balanced, and three-phase balance, relation are as follows：
That is Ua=Ub=Uc
Ia=Ib=Ic
Ψ a=Ψ b=Ψ c
Therefore Pa=Pb=Pc
And show general power P, P=Pa+Pb+Pc=3P on the monitoring computer in transformer station.
The electric current and voltage gathered by measure and control device in transformer station is vectorial, the attribute with size and Orientation.Power transformation
Actual voltage and current is transformed into by measure and control device by voltage transformer summation current transformer typically in standing, can be gathered
The relatively low voltage and current proportional to actual value, the voltage and current after transformation still have the attribute of size and Orientation,
Low-voltage and low current after cable is by transformation is linked into measure and control device, and measure and control device is further according to the voltage and current for accessing
Go to calculate the numerical value such as power.
As electric current and voltage have the attribute of size and Orientation, therefore, when there is electric current and voltage not according to correct
When order accesses the situation of measure and control device, line power exception can be caused, affect the electricity to supply line to calculate, cause economy
Loss.Such as when B phases, C phase voltages phase sequence are conversely, as shown in Fig. 2 its corresponding power calculation process is as follows：
Assume Ψ a=Ψ b=Ψ c=30 °
As can be seen from Figure：Ub Uc are 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 for having a strong impact on supply line is calculated.
Original monitor mode is only capable of the data such as monitoring Ua, Ub, Uc, Ia, Ib, Ic, Ψ a, Ψ b, Ψ, Pa, Pb, Pc, P,
Power abnormal alarm can not be sent.
Content 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 change
The data that measure and control device in Power Station Monitored Control System can be collected, take corresponding logical judgment, realize power abnormal alarm,
And can show it is any two voltage phase sequence mistakes.
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 are as follows：
1st, given threshold electric current I0 and threshold voltage U0, the threshold current I0 and threshold voltage U0 are respectively line current
Rated value and the 0.5% of line voltage distribution rated value；
2nd, forward table is formulated in transformer substation side monitoring host computer and remote monitoring central host, will " line power report extremely
Police ", " warning of A, B phase voltage inverted sequence ", " warning of B, A phase voltage inverted sequence " and " warning of A, C phase voltage inverted sequence " 4 signals are continuously arranged
Forward table is listed in accordingly on standby point；
3rd, A phase current Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltages Ub are gathered by measure and control device
With C phase voltages Uc；
4th, judge that A phase currents Ia, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge B phase current Ib；
5th, judge that B phase currents Ib, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge C phase current Ic；
6th, judge that C phase currents Ic, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge A phase voltages Ua；
7th, judge that A phase voltages Ua, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge B phase voltages Ub；
8th, judge that B phase voltages Ub, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge C phase voltages Uc；
9th, judge that C phase voltages Uc, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge general power P；
10th, judge whether general power P is equal to zero, rejudge if being not equal to, if equal to, then produced by measure and control device
Raw message, and monitoring computer and monitoring host computer send line power abnormal alarm message into transformer station, then by transformer substation side
By forward table, distally centralized control center's main frame sends corresponding message to monitoring host computer, and continues next step judgement；
11st, judge whether Pa is not equal to UaIa Ψ a, if it is not, message is produced by measure and control device then, and to transformer station
Interior monitoring computer and monitoring host computer send " warning of B, C phase voltage inverted sequence " message, then by transformer substation side monitoring host computer by turning
Deliver distally centralized control center's main frame and send corresponding message, and continue next step judgement；
12nd, judge whether Pb is not equal to UbIb Ψ b, if it is not, message is produced by measure and control device then, and to transformer station
Interior monitoring computer and monitoring host computer send " warning of A, B phase voltage inverted sequence " message, then by transformer substation side monitoring host computer by turning
Deliver distally centralized control center's main frame and send corresponding message, and continue next step judgement；If equal to, then send A, C phase electric
Pressure inverted sequence is reported to the police.
Beneficial effects of the present invention：Due to having faradic presence between each circuit in transformer station, therefore line outage
In the state of, measure and control device still can induce smaller electric current and voltage value, should not send out under this power down mode
Go out to report to the police, therefore will remove this kind of state first.The present invention is set to I0 and U0 by given threshold current value and magnitude of voltage.?
That is, when current value and magnitude of voltage are respectively greater than I0 and U0, it is believed that circuit has electricity, start to judge whether power is abnormal, when
When current value and magnitude of voltage are respectively smaller than I0 and U0, it is believed that circuit does not go to judge whether power is abnormal, judges standard to improve without electricity
True property.According to the data that the measure and control device in monitoring system of electric substation can be collected, corresponding logical judgment is taken, work(is realized
Rate abnormal alarm, and can show it is which two voltage phase sequence mistake (typically realizes electricity by changing the voltage phase sequence of mistake
Pressure is identical with the phase sequence of electric current).Power abnormal alarm is sent in time can, it is to avoid electric energy tariff mistake.When occurring abnormal also
The separate of phase sequence mistake can be pointed out, helps attendant quick and precisely to process exception.
Description of the drawings
Fig. 1 is phase diagram when electric current and voltage are accessed according to correct order；
Fig. 2 is that electric current and voltage phase diagram when not accessing according to correct order；
Fig. 3 is the decision logic figure of the present invention.
Specific embodiment
As shown in figure 3, transformer station measurement and control device power abnormal alarm method, its step is as follows：
1st, given threshold electric current I0 and threshold voltage U0, the threshold current I0 and threshold voltage U0 are respectively line current
Rated value and the 0.5% of line voltage distribution rated value；
2nd, forward table is formulated in transformer substation side monitoring host computer and remote monitoring central host, will " line power report extremely
Police ", " warning of A, B phase voltage inverted sequence ", " warning of B, C phase voltage inverted sequence " and " warning of A, C phase voltage inverted sequence " 4 signals are continuously arranged
Forward table is listed in accordingly on standby point；
3rd, A phase current Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltages Ub are gathered by measure and control device
With C phase voltages Uc；
4th, judge that A phase currents Ia, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge B phase current Ib；
5th, judge that B phase currents Ib, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge C phase current Ic；
6th, judge that C phase currents Ic, whether more than threshold current I0, is rejudged if being not more than, if greater than then continuing
Judge A phase voltages Ua；
7th, judge that A phase voltages Ua, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge B phase voltages Ub；
8th, judge that B phase voltages Ub, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge C phase voltages Uc；
9th, judge that C phase voltages Uc, whether more than threshold voltage U0, are rejudged if being not more than, if greater than then continuing
Judge general power P；
10th, judge whether general power P is equal to zero, rejudge if being not equal to, if equal to, then produced by measure and control device
Raw message, and monitoring computer and monitoring host computer send line power abnormal alarm message into transformer station, then by transformer substation side
By forward table, distally centralized control center's main frame sends corresponding message to monitoring host computer, and continues next step judgement；
11st, judge whether Pa is not equal to UaIa Ψ a, if it is not, message is produced by measure and control device then, and to transformer station
Interior monitoring computer and monitoring host computer send " warning of B, C phase voltage inverted sequence " message, then by transformer substation side monitoring host computer by turning
Deliver distally centralized control center's main frame and send corresponding message, and continue next step judgement；
Judge whether Pb is not equal to UbIb Ψ b, if it is not, message is produced by measure and control device then, and into transformer station
Monitoring computer and monitoring host computer send " warning of A, B phase voltage inverted sequence " message, then by transformer substation side monitoring host computer by forwarding
Distally centralized control center's main frame sends corresponding message to table, and continues next step judgement；If equal to, then send A, C phase voltage
Inverted sequence is reported to the police.
Claims (1)
1. transformer station measurement and control device power abnormal alarm method, is characterized in that step is as follows：
Given threshold electric current I0 and threshold voltage U0, the threshold current I0 and threshold voltage U0 are respectively line current rated value
And the 0.5% of line voltage distribution rated value；
Forward table is formulated in transformer substation side monitoring host computer and remote monitoring central host, by " line power abnormal alarm ", " A, B
Phase voltage inverted sequence warning ", " warning of B, C phase voltage inverted sequence " and " warning of A, C phase voltage inverted sequence " 4 signal continuous arrangements are being forwarded
Table is accordingly on standby point；
A phase currents Ia, B phase current Ib and C phase current Ic and A phase voltage Ua, B phase voltage Ub and C phases are gathered by measure and control device
Voltage Uc；
Judging, A phase currents Ia, whether more than threshold current I0, is rejudged if being not more than, B judged if greater than then continuation
Phase current Ib；
Judging, B phase currents Ib, whether more than threshold current I0, is rejudged if being not more than, C judged if greater than then continuation
Phase current Ic；
Judging, C phase currents Ic, whether more than threshold current I0, is rejudged if being not more than, A judged if greater than then continuation
Phase voltage Ua；
Judging, A phase voltages Ua, whether more than threshold voltage U0, are rejudged if being not more than, B judged if greater than then continuation
Phase voltage Ub；
Judging, B phase voltages Ub, whether more than threshold voltage U0, are rejudged if being not more than, C judged if greater than then continuation
Phase voltage Uc；
Judge that C phase voltages Uc, whether more than threshold voltage U0, are rejudged if being not more than, total if greater than judgement is then continued
Power P；
Judge whether general power P is equal to zero, rejudge if being not equal to, if equal to, then message is produced by measure and control device,
And monitoring computer and monitoring host computer send line power abnormal alarm message into transformer station, then by transformer substation side monitoring host computer
By forward table, distally centralized control center's main frame sends corresponding message, and continues next step judgement；
Judge whether Pa is not equal to UaIa Ψ a, " Ψ a " is angle between A phase voltages Ua and A phase current Ia, if it is not, then by
Measure and control device produces message, and monitoring computer and monitoring host computer send " warning of B, C phase voltage inverted sequence " message into transformer station,
By transformer substation side monitoring host computer, by forward table, distally centralized control center's main frame sends corresponding message again, and continues next step and sentence
Disconnected；
Judge whether Pb is not equal to UbIb Ψ b, " Ψ b " is angle between B phase voltages Ub and B phase current Ib, if it is not, then by
Measure and control device produces message, and monitoring computer and monitoring host computer send " warning of A, B phase voltage inverted sequence " message into transformer station,
By transformer substation side monitoring host computer, by forward table, distally centralized control center's main frame sends corresponding message again, and continues next step and sentence
Disconnected；If equal to, then send the warning of A, C phase voltage inverted sequence.
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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 true CN104348255B (en) | 2017-03-15 |
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| EP2331978B1 (en) * | 2008-09-24 | 2014-05-07 | ABB Research Ltd. | Method and device for supervising secondary circuit of instrument transformer in power system |
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