CN103995172B - Method for on-line monitoring of load current of GIS bus of substation - Google Patents
Method for on-line monitoring of load current of GIS bus of substation Download PDFInfo
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- CN103995172B CN103995172B CN201410245627.3A CN201410245627A CN103995172B CN 103995172 B CN103995172 B CN 103995172B CN 201410245627 A CN201410245627 A CN 201410245627A CN 103995172 B CN103995172 B CN 103995172B
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Abstract
The invention provides a method for on-line monitoring of a load current of a GIS bus of a substation. The method comprises the steps that a distribution diagram of GIS device intervals is drawn according to site layout information of a GIS of the substation, and the GIS bus is sectioned according to the distribution diagram and the actual physical information of the substation; the load current of each line and the quantity of states of switches and disconnecting links of the substation are obtained from an EMS system; the load current of each subsection of the GIS bus is calculated according to the Kirchhoff law, the load currents and the quantity of states; on-line monitoring is conducted on the GIS bus according to the load current of each subsection of the GIS bus of the substation. According to the technical scheme, real-time on-line monitoring of the load current of each subsection of the GIS bus of the substation is achieved, more direct state parameters in the GIS operation process are obtained, more reliable data reference is provided for infrared detection and GIS tests, stable operation of the GIS device is guaranteed, and the reliability of power supply of the power system is improved.
Description
Technical field
The present invention relates to electric power project engineering field, more particularly to a kind of transformer station gis bus load electric current is supervised online
Survey method.
Background technology
The gas-insulating and fully-enclosed combined electrical apparatus of sf6 (gis), because floor space is little, stability is high etc., series of advantages is subject to
The extensive utilization of power consumer.Passage however as run time and growing workload demand, what gis equipment ran can
Enjoy the concern of power consumer by property, the mode that it is safeguarded is also in the urgent need to being changed from periodic maintenance to state-maintenance.
Due to being limited by gis equipment Self-Closing structure, mainly adopt Partial Discharge Detection means at present to gis
Operation conditions carries out on-line monitoring, shelf depreciation because main by superfrequency wireless receiving or by coupling grounding signal Lai
Determine whether there is internal shelf depreciation, thus exist discharge position be difficult to determine, sensitivity difference and antijamming capability low
Problem is not also completely resolved, and thus, having expedited the emergence of can be in conjunction with the infrared measurement of temperature of bus load electric current in the detection of gis equipment
Application.
With the development of the technology such as infrared detection, the load feelings of the state parameter particularly gis bus of gis operation can be obtained
Condition, carries out infrared measurement of temperature to gis and is just particularly important.Have no gis bus current due in ems system (EMS)
Data, this brings very big inconvenience to gis test, particularly for gis bus equipment, when infrared measurement of temperature is carried out to it,
Due to lacking load current data as reference, lead to the accuracy of its thermometric relatively low.
Content of the invention
Based on this it is necessary to be directed to above-mentioned technical problem, provide a kind of transformer station gis bus load electric current on-line monitoring side
Method, obtains more direct state parameter in gis running, is infrared detection and gis test offer more reliable data reference.
A kind of transformer station gis bus load electric current on-line monitoring method, comprises the steps:
Draw the distribution map of gis equipment interval according to transformer station gis site layout project information；
According to described distribution map and with reference to transformer station's actual physics information, gis bus is carried out segmentation；
Obtain the quantity of state of the load current, switch and disconnecting link of each circuit of transformer station from ems system；
Calculate the load electricity of gis each segmentation of bus by Kirchhoff's law and according to described load current and quantity of state
Stream；
On-line monitoring is carried out to gis bus according to the load current of described gis each segmentation of bus.
Above-mentioned transformer station gis bus load electric current on-line monitoring method, by entering to gis bus according to gis equipment interval
Row segmentation, and calculate the load current of each segmentation, realize the real-time online prison to each segmentation load current of gis transformer station median generatrix
Survey, more direct state parameter in gis running can be obtained, be infrared detection and gis test offer more reliable data
Reference, ensures gis equipment stable operation, improves the reliability of power system power supply.
Brief description
Fig. 1 is the transformer station gis bus load electric current on-line monitoring method flow chart of the present invention；
Fig. 2 is gis bus section schematic diagram；
Fig. 3 is gis bus section load current computation model schematic diagram；
Fig. 4 is the flow chart of the load current actual value determining bus connection switch；
Fig. 5 is infrared measurement of temperature collection of illustrative plates schematic diagram.
Specific embodiment
Specific embodiment to the transformer station gis bus load electric current on-line monitoring method of the present invention below in conjunction with the accompanying drawings
It is described in detail.
With reference to shown in Fig. 1, Fig. 1 is the transformer station gis bus load electric current on-line monitoring method flow chart of the present invention, including
Following steps:
Step s10, draws the distribution map of gis equipment interval according to transformer station gis site layout project information.
Gis bus is carried out segmentation according to described distribution map and with reference to transformer station's actual physics information by step s20.
Step s30, obtains the quantity of state of the load current, switch and disconnecting link of each circuit of transformer station from ems system.
In one embodiment, for the step of the load current obtaining gis transformer station each bar circuit in step s30, tool
Body includes:
Step s301, gathers gis transformer station each bar transformer inlet wire and circuit in running by signal transducer
The load current data of outlet.
Preferably, the precision of signal transducer can reach 0.5 grade, and that is, measured value and the error of actual value are less than 0.5%,
The precision of signal transducer meets the requirement of ems system.
Step s302, the load current data-signal that signal transducer is produced is acquired and transmits to ems system.
This process is mainly acquired and transmits it is preferred that utilizing signal to the load current data-signal of sensor
The capture card that acquisition time interval can reach ms level is acquired, and can take hundreds of data each second, data volume is richer
Richness, meets the demand of ems system.
Further, for the transmission of load current data-signal, system can be inquired downwards using main website, including two kinds of sides
Formula: the first is to upload when data exceedes threshold value (the general setting of this threshold value is larger)；Second is that main website periodically enters road wheel
Ask.
The actual physics figure of described load current data and transformer station gis equipment is carried out in ems system by step s303
Association, obtains the characteristic quantity database of gis bus load current monitoring.
This process is mainly the transformer station gis bus load current monitoring characteristic quantity database set up based on ems system；Logical
Cross and physical map actual with current transformer station gis for the load current data of each line of gis being transmitted through coming from transformer station is carried out
Association, makes the gis network topological diagram in ems system consistent with each actual physical routing, thus having ensured each gis bus load
Size of current is corresponding with reality.
Step s304, reads each bar transformer inlet wire and the circuit of gis transformer station from described characteristic quantity database in real time
The load current of outlet.
Step s40, calculates each segmentation of gis bus by Kirchhoff's law and according to described load current and quantity of state
Load current.
Have differences because circuit goes out the signal such as line current and transformer inlet wire current, gis bus is in each compartment
Each section of load current there is also difference, for monitor gis bus current, in this step, each segmentation to gis bus
Load current is monitored respectively, then using Kirchhoff's law, the segmentation load current of gis bus is calculated, thus
Realize accurately monitoring in real time.
In one embodiment, the load current of gis each segmentation of bus is calculated according to described load current and quantity of state
Step, specifically include:
Step s401, sets up gis bus load electricity by Kirchhoff's law and based on each segmentation of described gis bus
The computation model of stream.
Step s402, according to the positive current direction of described computation model and setting, sets up the section of each segmentation of gis bus
Point current equation.
Step s403, the quantity of state of the load current, switch and disconnecting link of each for gis transformer station bar circuit is substituted into described node
Current equation, calculates the load current of each segmentation of gis bus.
For the computational methods of step s403, specifically include following steps:
(1) switch on the load current of each bar transformer inlet wire of gis transformer station and its circuit, the state of disconnecting link are obtained
Switch in amount, and the load current of circuit outlet and its circuit, the quantity of state of disconnecting link.
Generally, in the original coding of ems system, switch, the quantity of state of disconnecting link take in switch, disconnecting link closure
It is worth for 2, during disconnection, value is 1.
(2) quantity of state of the switch on the load current of transformer inlet wire and its circuit, disconnecting link is carried out logical operation, obtain
Load current actual value to transformer inlet wire.
For circuit outlet, only switch and disconnecting link just has value when entirely closing, and therefore, the load current of transformer inlet wire is real
Actual value is logically belonged to and relation with switch, the quantity of state of disconnecting link.
Specifically, can be calculated using equation below:
i1=(z1-1)′(z10-1)′i1'
In formula, i1For the load current actual value of transformer inlet wire, z1For the quantity of state of switch, z10State for disconnecting link
Amount, i1' for transformer inlet wire load current.
(3) quantity of state of the switch on the load current of circuit outlet and its circuit, disconnecting link is carried out logical operation, obtain
The load current actual value of circuit outlet.
In the same manner, for transformer inlet wire, only switch and disconnecting link just have value when entirely closing, therefore, transformer inlet wire negative
Charged current actual value is logically belonged to and relation with switch, the quantity of state of disconnecting link.
Specifically, can be calculated using equation below:
i2=(z2-1)′(z20-1)′i2'
In formula, i2For the load current actual value of circuit outlet, z2For the quantity of state of switch, z20For the quantity of state of disconnecting link,
i2' for circuit outlet load current.
(4) obtain the load current of bus connection switch of gis transformer station, flow in and out the total load electric current of gis bus, and
Determine the sense of current of the load current of described total bus connection switch according to the positive current direction setting and total load electric current, obtain mother
The load current actual value of connection switch.
For bus connection switch, generally, only one of which mother interval in gis equipment, by obtaining bus connection switch
Load current, and then determine its direction, obtain the load current actual value of bus connection switch.
The load current of bus connection switch can obtain from the characteristic quantity database of ems system, and sentences for its direction
Determine method, can be such that
First, according to the positive current direction setting, by the load current collection value of the bus connection switch obtaining and switch, disconnecting link
Quantity of state carry out logical operation, obtain the load current calculated value of bus connection switch.
Then, whether the load current of bus connection switch judging reality is 0, and if so, then the load current of bus connection switch is real
Actual value is equal to 0, otherwise, calculates total outflow load current that the total offered load electric current flowing into gis bus and gis bus flow out.
Finally, judge whether total offered load electric current flows out load current more than total, if so, then the load of bus connection switch is electric
Stream actual value is equal to load current collection value, and direction is consistent with the positive current direction of setting, if it is not, the load of then bus connection switch
Current actual value is equal to load current collection value, and direction is in opposite direction with the positive current setting.
(5) described transformer inlet wire, the load current actual value of circuit outlet and the bus connection switch with direction is negative
The load current of charged current substitutes into described node current equation, calculates the load current of each segmentation of gis bus.
In order to become apparent from the scheme of the load current calculating gis each segmentation of bus in each embodiment above-mentioned, below
Illustrate an application example in conjunction with accompanying drawing.
, this gis equipment has 12 outgoing line intervals, 1 mother taking the 110kv grade gis equipment of certain 220kv transformer station as a example
Connection interval, is spaced in 2 changes, 2 buses intervals.Draw gis bus section figure by gis device context placement information, with reference to Fig. 2
Shown, Fig. 2 is gis bus section schematic diagram, and gis bus can be divided into～wait 5 sections by air bound, can be divided into 1～14 altogether by interval
14 sections (actually 16 sections, but two segmentations on both sides do not have electric current, are not counted in), load current monitoring to be carried out to gis bus, so
14 sections should be divided into by space segmentation, the computation model of 14 obtaining after segmentation section bus load electric current, with reference to shown in Fig. 3, Fig. 3 is
Gis bus section load current computation model schematic diagram.
It is assumed that all of switch, disconnecting link are in closure state in computation model shown in Fig. 3.i11～i113For 1m
Each segmentation load current of (the first bus), i21～i213For each segmentation load current of 2m (the second bus), in、in(n=1,
2 ..., 12) for two branch currents of circuit outlet, i is the load current of bus connection switch, ia、iaIt is respectively two during main transformer becomes
Individual branch load current.Each direction of arrow shown in figure is the positive direction of load current, is analyzed according to node current method, can obtain
Following node current equation:
i21=i1
i22=i21+i2=i1+i2
i23=i22+i3=i1+i2+i3
i24=i23+i4=i1+i2+i3+i4
i25=i24+i5=i1+i2+i3+i4+i5
i26=i25+i6=i1+i2+i3+i4+i5+i6
i27=ia-i26=ia-(i1+i2+i3+i4+i5+i6) formula (1)
i28=i27-i7=ia-(i1+i2+i3+i4+i5+i6+i7)
i29=i28- i=ia-(i1+i2+i3+i4+i5+i6+i7+i)
i210=i29-i8=ia-(i1+i2+i3+i4+i5+i6+i7+i8+i)
i211=i210-i9=ia-(i1+i2+i3+i4+i5+i6+i7+i8+i9+i)
i212=i211+ib=(ia+ib)-(i1+i2+i3+i4+i5+i6+i7+i8+i9+i)
i213=i212-i10=(ia+ib)-(i1+i2+i3+i4+i5+i6+i7+i8+i9+i10+ i)=- ic
i11=i1
i12=i11+i2=i1+i2
i13=i12+i3=i1+i2+i3
i14=i13+i4=i1+i2+i3+i4
i15=i14+i5=i1+i2+i3+i4+i5
i16=i15+i6=i1+i2+i3+i4+i5+i6
i17=ia-i16=ia-(i1+i2+i3+i4+i5+i6) formula (2)
i18=i17-i7=ia-(i1+i2+i3+i4+i5+i6+i7)
i19=i18+ i=(ia+i)-(i1+i2+i3+i4+i5+i6+i7)
i110=i19-i8=(ia+i)-(i1+i2+i3+i4+i5+i6+i7+i8)
i111=i110-i9=(ia+i)-(i1+i2+i3+i4+i5+i6+i7+i8+i9)
i112=i111+ib=(ia+ib+i)-(i1+i2+i3+i4+i5+i6+i7+i8+i9)
i113=i112-i10=(ia+ib+i)-(i1+i2+i3+i4+i5+i6+i7+i8+i9+i10)=- ic
It should be noted that this application example simply lists wherein one phase, in application, the situation of three-phase all can be by same
Mode is processed.
In formula, each section of load current i of bus11-i113And i21-i213For unknown quantity, other load currents are known quantity,
These known quantities are divided into following three classes:
(1) outlet class
, corresponding line is 131 circuits, for i taking Buddhist sea line as a example1For, only 131 switch (opening on 131 circuits
Close) and just have actual value when 1312 disconnecting links (disconnecting links on 131 circuits) close simultaneously, logically belong to "AND" relation.Root
It being described as 2 according to quantity of state when ems system breaker in middle, disconnecting link closure, during disconnection, quantity of state is described as 1, so, i1 can be expressed such as
Under:
i1=(z131-1)′(z1312-1)′i131
In formula, z131For the quantity of state description of switch, z1312For the quantity of state description of disconnecting link, i131Load for 131 circuits
Electric current, can obtain from the characteristic quantity database of ems system.
In the same manner, i1=(z131-1)′(z1311-1)′i131, other circuits make similar process.
(2) main transformer class
, similar with circuit outlet taking #1 main transformer as a example, when that is, only change breaker in middle and bus bar side disconnecting link close simultaneously
Just there is actual value, so, can be by iaAnd iaIt is expressed as follows:
ia=(z101-1)′(z1012-1)′i101
ia=(z101-1)′(z1011-1)′i101
In the same manner, other main transformers can also do similar process.
(3) bus connection switch class
In diagram, only one of which mother interval (here is exemplified as 100 mother intervals) in 110kv gis equipment, in upper figure
The load current collection value of middle bus connection switch is i100, can obtain from ems system character database, further according to set
Forward current direction determines its load current direction (it is positive current direction that setting electric current flows to 1m by 2m).
With reference to shown in Fig. 4, Fig. 4 is the flow chart of the load current actual value determining bus connection switch, and main inclusion is following to be walked
Rapid:
Step s1, calculates the load current calculated value i of bus connection switch0=(z100-1)×(z1001-1)×(z1002-1)×
i100；Wherein, z100、z1001、z1002For the quantity of state of switch, disconnecting link, i100It is the load electricity of the bus connection switch obtaining from ems system
Stream collection value.
Step s2, judges whether i is equal to 0, and if so, the load current actual value of bus connection switch is equal to 0, otherwise enters step
s3.
Step s3, calculates total offered load electric current the i '=i flowing into 2ma+ib+ic；And total outflow of calculating 2m outflow is negative
Charged current i '=i1+i2+…i10.
Step s4, judges that whether i ' is more than i ', if so, load current actual value i=i of then bus connection switch100；Otherwise, i
=-i100.
In conjunction with the calculating of the different classes of electric current of above-mentioned three classes, calculate i successively1…i10, i, i1…i10, ia, ib, ic, ia, ib,
ic, calculated value is substituted into formula (1) and formula (2), the load current obtaining each segmentation of gis bus can be sought.
Step s50, carries out on-line monitoring according to the load current of described gis each segmentation of bus to gis bus.
Being mainly according to gis bus load situation of this process, determines corresponding alarm threshold value, reminds and runs and test people
Member does corresponding work, ensures gis equipment safety stable operation.
In one embodiment, for according to the load current of described gis each segmentation of bus, gis bus is carried out online
The step of monitoring, specifically includes:
Step s501, by gis bus and gis transformer station each bar circuit and transformer bay every topology diagram opened up
Show, and show the load current of each segmentation of gis bus.
Step s502, determines corresponding alarm threshold value according to the load current that each segmentation of gis bus is specified.
Step s503, judges the load current of gis each segmentation of bus according to described alarm threshold value.
Step s504, if exceeding alarm threshold value, corresponding segments on topology diagram being arranged to different colours and is dashed forward
Go out display.
The scheme of above-described embodiment, can by gis bus and line related, transformer bay every real topology show
Which out, and show the load current of each segmentation of gis bus, if there are section load current occur reporting to the police, then by this subsection setup
Different colours are become to highlight, to reach alarm warning function.
, its rated current is 1250a taking certain transformer station 110kv gis as a example, when a certain segmentation load electricity in gis bus
The 60% of stream overrate, when that is, more than 1250*60%=750a, then by this segmentation with yellow flag；When in gis bus
The 80% of a certain segmentation load current overrate, when that is, more than 1250*80%=1000a, then by this segmentation with red mark
Note.
Technical scheme, can be negative by using the required each line of gis bus of signal transducer collection
Charged current, then gathers these load current data and is transferred to main website, enters the database of ems system, in conjunction with table of equipment
Account is associated with physical device, based on the load current data of each line of ems system gis equipment, in conjunction with respectively opening
The quantity of state closing, calculates the value of each segmented current, with gis bus rated load current by bus each segmented current computational methods
Compare, set corresponding alarm threshold value, can automatically be diagnosed and whether exceed alarm threshold value, improve anti-to gis fault
The sensitivity answered, realizes under conditions of not increasing hardware device, obtains the big of gis bus each segmentation load current exactly
Little, realize the on-line monitoring to each segmented current of gis bus.
Technical scheme, by transformer station's gis bus each segmentation load current on-line monitoring, to the infrared survey of guidance
Temperature etc. provides more direct reference quantity, and utilization in power system for the infrared measurement of temperature should not be simple temperature index, its
The judgement needs of accident defect are combined with correlation behavior amount, just can be unlikely to situation erroneous judgement and failing to judge, with certain transformer station
As a example gis infrared measurement of temperature.
As shown in figure 5, Fig. 5 be infrared measurement of temperature collection of illustrative plates schematic diagram although there being the temperature difference of 1.3oc between gis 2 air chambers, but not
Can therefore judge that one of air chamber is problematic, if do not have the situation of significant change in bus load electric current, infared spectrum goes out
Existing above-mentioned phenomenon is it is reason to believe that existing problems are it should power failure immediately is processed, but if the higher air chamber of temperature inside this gis
The load current of that section of bus makes its electric current increase due to due to scheduling, leads to this air chamber to generate heat, than the air chamber temperature on side
High, then as long as carrying out paying close attention to air chamber, should temperature can decline therewith after load current recovers.So gis
The on-line monitoring of each segmented current of bus load provides more direct reference quantity to the judgement of the defect fault such as infrared measurement of temperature,
It is infrared detection technology and other test offer more reliable data reference, ensure gis equipment stable operation it is ensured that power supply is reliable
Property, the reference to gis checking experiment is significant.
As can be seen here, the technical scheme of the offer of the present invention, can achieve that segmented current each to gis bus carries out real-time online
Monitoring, is timely and effectively monitored to gis, ensures gis safe and stable operation, because gis bus load electric current provides gis to touch
First-class one direct parameter of heating accident, such as a gis conducting connecting part accident, the economic loss that its direct gis damages
Just up to 1,000,000 yuan, because conducting connecting part is the critical component of composition gis bus, its fault will necessarily cause transformation
The trip protection of device or even transformer damage, cause no-voltage of entire station, and cause the multiple substation power loss of subordinate, its loss is suitable
Big.Assume that a 220kv gis transformer station occurs the arcing ground fault of conducting connecting part, cause 2 240mva masters of whole station
Transformer therefore trips and runs 6h less, and causes 7 110kv substation power loss of subordinate, and loss electricity is 2.88 × 106 degree,
In terms of 0.6 yuan/degree, then economic loss reaches 172.8 ten thousand yuan.It can be seen that, this technology can avoid Similar Problems in time, can reduce loss
It is contemplated that economic benefit is huge, promotion prospect is wide for 172.8 ten thousand yuan of losses.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (9)
1. a kind of transformer station gis bus load electric current on-line monitoring method is it is characterised in that comprise the steps:
Draw the distribution map of gis equipment interval according to transformer station gis site layout project information；
According to described distribution map and with reference to transformer station's actual physics information, gis bus is carried out segmentation；
Obtain the load current of each circuit of transformer station from ems system, obtain the quantity of state of switch and disconnecting link simultaneously；
Calculate the load current of gis each segmentation of bus by Kirchhoff's law and according to described load current and quantity of state；
Specifically include: set up the calculating of gis bus load electric current by Kirchhoff's law and based on each segmentation of described gis bus
Model；According to the positive current direction of described computation model and setting, set up the node current equation of each segmentation of gis bus；
The quantity of state of the load current, switch and disconnecting link of each for gis transformer station bar circuit is substituted into described node current equation, calculates
The load current of each segmentation of gis bus；
On-line monitoring is carried out to gis bus according to the load current of described gis each segmentation of bus.
2. transformer station gis bus load electric current on-line monitoring method according to claim 1 will be it is characterised in that described will
The quantity of state of the load current, switch and disconnecting link of gis transformer station each bar circuit substitutes into described node current equation, calculates gis
The step of the load current of each segmentation of bus, comprising:
Switch on the load current of each transformer inlet wire of acquisition gis transformer station and its circuit and the quantity of state of disconnecting link, with
And the quantity of state of the switch on the load current of circuit outlet and its circuit and disconnecting link；
The quantity of state of the switch on the load current of transformer inlet wire and its circuit and disconnecting link is carried out logic and operation, is become
The load current actual value of depressor inlet wire；
The quantity of state of the switch on the load current of circuit outlet and its circuit and disconnecting link is carried out logic and operation, obtains circuit
The load current actual value of outlet；
Obtain the load current of bus connection switch of gis transformer station, flowing in and out the total load electric current of gis bus, and according to setting
Fixed positive current direction and total load electric current determine the sense of current of the load current of total bus connection switch, obtain the negative of bus connection switch
Charged current actual value；
By the load current of described transformer inlet wire, the load current actual value of circuit outlet and the bus connection switch with direction
Load current substitutes into described node current equation, calculates the load current of each segmentation of gis bus.
3. transformer station gis bus load electric current on-line monitoring method according to claim 2 is it is characterised in that described open
The quantity of state of pass and disconnecting link value in switch and disconnecting link closure is 2, and during disconnection, value is 1；
The quantity of state of the switch on the described load current by transformer inlet wire and its circuit and disconnecting link carries out logical operation, obtains
The step of the load current actual value of transformer inlet wire, including equation below:
i1=(z1-1)×(z10-1)×i1'
In formula, i1For the load current actual value of transformer inlet wire, z1For the quantity of state of switch, z10For the quantity of state of disconnecting link, i1'
Load current for transformer inlet wire；
The quantity of state of the switch on the load current of circuit outlet and its circuit and disconnecting link is carried out logical operation, obtains circuit and go out
The step of the load current actual value of line, including equation below:
i2=(z2-1)×(z20-1)×i2'
In formula, i2For the load current actual value of circuit outlet, z2For the quantity of state of switch, z20For the quantity of state of disconnecting link, i2' be
The load current of circuit outlet.
4. transformer station gis bus load electric current on-line monitoring method according to claim 2 is it is characterised in that obtain gis
The load current of the bus connection switch of transformer station, flow in and out the total load electric current of gis bus, and according to the positive current side setting
To the sense of current of the load current determining described total bus connection switch with total load electric current, the load current obtaining bus connection switch is real
The step of actual value, comprising:
According to the positive current direction setting, by the quantity of state of the load current collection value of the bus connection switch obtaining and switch, disconnecting link
Carry out logical operation, obtain the load current calculated value of bus connection switch；
Whether the load current of bus connection switch judging reality is 0, and if so, then the load current actual value of bus connection switch is equal to 0,
Otherwise, calculate total outflow load current that the total offered load electric current flowing into gis bus and gis bus flow out；
Judge that whether total offered load electric current flows out load current more than total, if so, the load current actual value of then bus connection switch
Equal to load current collection value, and direction is consistent with the positive current direction setting, if it is not, then the load current of bus connection switch is actual
Value is equal to load current collection value, and direction is in opposite direction with the positive current setting.
5. the transformer station gis bus load electric current on-line monitoring method according to any one of Claims 1-4, its feature exists
In the step that the described load current according to described gis each segmentation of bus carries out on-line monitoring to gis bus, comprising:
By gis bus and gis transformer station each bar circuit and transformer bay every topology diagram be shown, and show that gis is female
The load current of each segmentation of line；
Corresponding alarm threshold value is determined according to the load current that each segmentation of gis bus is specified；
Judge the load current of gis each segmentation of bus according to described alarm threshold value；
If exceeding alarm threshold value, corresponding segments on topology diagram being arranged to different colours and is highlighted.
6. transformer station gis bus load electric current on-line monitoring method according to claim 1 is it is characterised in that from ems system
The step that system obtains the quantity of state of load current, switch and disconnecting link of each circuit of transformer station, comprising:
Gather the load current of gis transformer station each bar transformer inlet wire and circuit outlet in running by signal transducer
Data；
The load current data-signal that signal transducer is produced is acquired and transmits to ems system；
The actual physics figure of described load current data and transformer station gis equipment is associated by ems system, obtains gis
The characteristic quantity database of bus load current monitoring；
Each bar transformer inlet wire of gis transformer station and the load electricity of circuit outlet is read in real time from described characteristic quantity database
Stream.
7. transformer station gis bus load electric current on-line monitoring method according to claim 6 is it is characterised in that described letter
The precision of number sensor is 0.5 grade.
8. transformer station gis bus load electric current on-line monitoring method according to claim 6 is it is characterised in that to signal
The mode that the load current data-signal that sensor produces was acquired and transmitted to ems system transmission includes: signals collecting
The load current data of device exceedes during threshold value active upload to ems system,
Or
Ems system main website is periodically polled signal transducer and obtains load current data；
For the transmission of load current data-signal, system is inquired downwards using main website, including two ways: the first is that data surpasses
Cross and upload during threshold value；Second is that main website is periodically polled.
9. transformer station gis bus load electric current on-line monitoring method according to claim 1 is it is characterised in that described gis
Equipment includes 110kv～500kv gis equipment.
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| CN105572461A (en) * | 2015-12-10 | 2016-05-11 | 国网四川省电力公司内江供电公司 | Load current monitoring alarm for electric power communication |
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| CN111896866A (en) * | 2020-07-06 | 2020-11-06 | 广东电网有限责任公司 | Method and device for detecting disconnecting link of hot bus-bar reversing operation bus |
| CN113108920B (en) * | 2021-04-13 | 2021-11-19 | 广东省源天工程有限公司 | Method for detecting 110kv voltage GIS disconnecting link based on DR imaging technology |
| CN113295910B (en) * | 2021-05-14 | 2022-06-03 | 国网安徽省电力有限公司马鞍山供电公司 | Split type clamp type current transformer and transformer substation line surveying and mapping method |
| CN114123507B (en) * | 2021-11-23 | 2022-11-22 | 国网山东省电力公司威海市文登区供电公司 | Centralized monitoring method, equipment and medium for power grid equipment |
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