CN103995172A - 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
- Publication number
- CN103995172A CN103995172A CN201410245627.3A CN201410245627A CN103995172A CN 103995172 A CN103995172 A CN 103995172A CN 201410245627 A CN201410245627 A CN 201410245627A CN 103995172 A CN103995172 A CN 103995172A
- Authority
- CN
- China
- Prior art keywords
- gis
- load current
- bus
- current
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
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, particularly relate to a kind of GIS of transformer station bus load electric current on-line monitoring method.
Background technology
The gas-insulating and fully-enclosed combined electrical apparatus of SF6 (GIS), because the series of advantages such as floor area is little, stability is high are subject to the extensive utilization of power consumer.But along with the passing of working time and growing workload demand, GIS equipment reliability of operation enjoys the concern of power consumer, the mode of its maintenance is also in the urgent need to being changed to state-maintenance by periodic maintenance.
Owing to being subject to the restriction of GIS equipment Self-Closing structure, the main Partial Discharge Detection means that adopt are carried out on-line monitoring to GIS operation conditions at present, shelf depreciation is because mainly determine whether and have inner shelf depreciation by superfrequency wireless receiving or by coupling grounding signal, so have that discharge position is difficult to determine, sensitivity is poor and antijamming capability is low etc. that problem is also solved completely, thus, having expedited the emergence of can the application in GIS equipment Inspection in conjunction with the infrared measurement of temperature of bus load electric current.
Along with the development of the technology such as infrared detection, can obtain the particularly load condition of GIS bus of state parameter of GIS operation, GIS is carried out to infrared measurement of temperature and just seem particularly important.Owing to there is no GIS bus current data in EMS system (energy management system), to GIS, test brings very large inconvenience for this, particularly concerning GIS bus equipment, in the time that it is carried out to infrared measurement of temperature, owing to lacking load current data as a reference, cause the accuracy of its thermometric lower.
Summary of the invention
Based on this, be necessary for above-mentioned technical matters, a kind of GIS of transformer station bus load electric current on-line monitoring method is provided, obtain more direct state parameter in GIS operational process, for infrared detection and GIS test provides more reliable data reference.
A kind of GIS of transformer station bus load electric current on-line monitoring method, comprises the steps:
Draw the distribution plan of GIS equipment interval according to the GIS of transformer station site layout project information;
According to described distribution plan and in conjunction with transformer station's actual physics information, GIS bus is carried out to segmentation;
From the quantity of state of load current, switch and the disconnecting link of the each circuit of EMS system acquisition transformer station;
Calculate the load current of each segmentation of GIS bus by Kirchhoff's law and according to described load current and quantity of state;
According to the load current of each segmentation of described GIS bus, GIS bus is carried out to on-line monitoring.
The above-mentioned GIS of transformer station bus load electric current on-line monitoring method, by GIS bus being carried out to segmentation according to GIS equipment interval, and calculate the load current of each segmentation, realize the real time on-line monitoring to the each segmentation load current of GIS transformer station median generatrix, can obtain more direct state parameter in GIS operational process, for infrared detection and GIS test provides more reliable data reference, ensure the stable operation of GIS equipment, improve the reliability of power system power supply.
Brief description of the drawings
Fig. 1 is the GIS of transformer station bus load electric current on-line monitoring method process flow diagram 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 process flow diagram of determining the load current actual value of bus connection switch;
Fig. 5 is infrared measurement of temperature collection of illustrative plates schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the GIS of transformer station bus load electric current on-line monitoring method of the present invention is described in detail.
Shown in figure 1, Fig. 1 is the GIS of transformer station bus load electric current on-line monitoring method process flow diagram of the present invention, comprises the steps:
Step S10, according to the distribution plan of the GIS of transformer station site layout project information drafting GIS equipment interval.
Step S20, carries out segmentation according to described distribution plan and in conjunction with transformer station's actual physics information by GIS bus.
Step S30, from the quantity of state of load current, switch and the disconnecting link of the each circuit of EMS system acquisition transformer station.
In one embodiment, for the step of load current of obtaining each circuit of GIS transformer station in step S30, specifically comprise:
Step S301, gathers the load current data of GIS transformer station each transformer inlet wire and circuit outlet in operational process by signal transducer.
Preferably, the precision of signal transducer can reach 0.5 grade, and the error of measured value and actual value is less than 0.5%, and the precision of signal transducer meets the requirement of EMS system.
Step S302, the load current data-signal that signal transducer is produced gathers and transfers to EMS system.
This process is mainly that the load current data-signal of sensor is gathered and transmitted, preferably, utilize the capture card that the signals collecting time interval can reach ms level to gather, can get a hundreds of data p.s., data volume is abundanter, meets the demand of EMS system.
Further, for the transmission of load current data-signal, can adopt main website to inquire system downwards, comprise two kinds of modes: the first is that data exceed threshold value (this threshold value general set larger) time and upload; The second is that main website periodically carries out poll.
Step S303 carries out described load current data and the actual physics figure of the GIS of transformer station equipment associatedly in EMS system, obtains the characteristic quantity database of GIS bus load current monitoring.
This process is mainly the GIS of the transformer station bus load current monitoring characteristic quantity database of setting up based on EMS system; By the load current data that pass the each line of GIS of coming from transformer station are carried out associated with the physical map of the current GIS of transformer station reality, make the GIS network topological diagram in EMS system consistent with the physical routing of each reality, thereby ensured that each GIS bus load size of current is with actual corresponding.
Step S304 reads in real time each transformer inlet wire of GIS transformer station and the load current of circuit outlet from described characteristic quantity database.
Step S40, calculates the load current of each segmentation of GIS bus by Kirchhoff's law and according to described load current and quantity of state.
Because going out the signal such as line current and transformer inlet wire current, circuit there are differences, GIS bus also there are differences in each section of load current of each compartment, for monitor GIS bus current, in this step, each segmentation load current to GIS bus is monitored respectively, then utilize Kirchhoff's law to calculate the segmentation load current of GIS bus, thereby realize real-time precise monitoring.
In one embodiment, according to the step of the load current of described load current and each segmentation of quantity of state calculating GIS bus, specifically comprise:
Step S401, by Kirchhoff's law and set up the computation model of GIS bus load electric current based on each segmentation of described GIS bus.
Step S402, according to the positive current direction of described computation model and setting, sets up the node current equation of each segmentation of GIS bus.
Step S403, by node current equation described in the quantity of state substitution of the load current of each GIS transformer station circuit, switch and disconnecting link, calculates the load current of each segmentation of GIS bus.
For the computing method of step S403, specifically comprise the steps:
(1) obtain the switch on load current and the circuit thereof of each transformer inlet wire of GIS transformer station, the quantity of state of disconnecting link, and the switch on load current and the circuit thereof of circuit outlet, the quantity of state of disconnecting link.
Generally, in the original coding of EMS system, the quantity of state of switch, disconnecting link value in the time of switch, disconnecting link closure is 2, and when disconnection, value is 1.
(2) quantity of state of the switch on the load current of transformer inlet wire and circuit thereof, disconnecting link is carried out to logical operation, obtain the load current actual value of transformer inlet wire.
For circuit outlet, only have switch and the disconnecting link Shi Caiyou value of entirely closing, therefore, the quantity of state of the load current actual value of transformer inlet wire and switch, disconnecting link logically belongs to and relation.
Concrete, can adopt following formula to calculate:
I
1＝(Z
1-1)′(Z
10-1)′I
1'
In formula, I
1for the load current actual value of transformer inlet wire, Z
1for the quantity of state of switch, Z
10for the quantity of state of disconnecting link, I
1' be the load current of transformer inlet wire.
(3) quantity of state of the switch on the load current of circuit outlet and circuit thereof, disconnecting link is carried out to logical operation, obtain the load current actual value of circuit outlet.
In like manner, for transformer inlet wire, only have switch and the disconnecting link Shi Caiyou value of entirely closing, therefore, the quantity of state of the load current actual value of transformer inlet wire and switch, disconnecting link logically belongs to and relation.
Concrete, can adopt following formula to calculate:
I
2＝(Z
2-1)′(Z
20-1)′I
2'
In formula, I
2for the load current actual value of circuit outlet, Z
2for the quantity of state of switch, Z
20for the quantity of state of disconnecting link, I
2' be the load current of circuit outlet.
(4) obtain the total load electric current of load current, inflow and the outflow GIS bus of the bus connection switch of GIS transformer station, and determine the direction of current of the load current of described total bus connection switch according to the positive current direction of setting and total load electric current, obtain the load current actual value of bus connection switch.
For bus connection switch, generally, in GIS equipment, only have a mother interval, by obtaining the load current of bus connection switch, 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 for the decision method of its direction, can be as follows:
First, according to the positive current direction of setting, the quantity of state of the load current collection value of the bus connection switch obtaining and switch, disconnecting link is carried out to logical operation, obtain the load current calculated value of bus connection switch.
Then, judge whether the load current of actual bus connection switch is 0, if so, the load current actual value of bus connection switch equals 0, otherwise, calculate and flow into total offered load electric current of GIS bus and total outflow load current that GIS bus flows out.
Finally, judge whether total offered load electric current is greater than total outflow load current, if, the load current actual value of bus connection switch equals load current collection value, and direction is consistent with the positive current direction of setting, if not, the load current actual value of bus connection switch equals load current collection value, and the positive current opposite direction of direction and setting.
(5), by node current equation described in the load current substitution of the load current of the load current actual value of described transformer inlet wire, circuit outlet and the bus connection switch with direction, calculate the load current of each segmentation of GIS bus.
In order to calculate the scheme of the load current of each segmentation of GIS bus in more clear above-mentioned each embodiment, set forth an application example below in conjunction with accompanying drawing.
Taking the 110kV grade GIS equipment of certain 220kV transformer station as example, this GIS equipment has 12 outgoing line intervals, 1 mother interval, interval in 2 changes, 2 bus intervals.Press GIS device context placement information and draw GIS bus section figure, shown in figure 2, Fig. 2 is GIS bus section schematic diagram, GIS bus can be divided into 5 sections of I～V etc. by air bound, can be divided into 1～14 totally 14 sections by interval (is 16 sections in fact, but two segmentations on both sides do not have electric current, be not counted in), to carry out load current monitoring to GIS bus, so should be divided into 14 sections by space segmentation, the computation model of 14 sections of bus load electric currents that obtain after segmentation, shown in figure 3, Fig. 3 is GIS bus section load current computation model schematic diagram.
In the computation model shown in Fig. 3, suppose that all switches, disconnecting link are all in closure state.I
11～I
113for each segmentation load current of 1M (the first bus), I
21～I
213for each segmentation load current of 2M (the second bus), I
n, i
n(n=1,2 ..., 12) and be two branch currents of circuit outlet, the load current that I is bus connection switch, I
a, i
abe respectively the Liang Ge branch load current in main transformer change.The positive dirction that each direction of arrow shown in figure is load current, analyzes according to node current method, can obtain following node current equation:
I
21＝I
1
I
22＝I
21+I
2＝I
1+I
2
I
23＝I
22+I
3＝I
1+I
2+I
3
I
24＝I
23+I
4＝I
1+I
2+I
3+I
4
I
25＝I
24+I
5＝I
1+I
2+I
3+I
4+I
5
I
26＝I
25+I
6＝I
1+I
2+I
3+I
4+I
5+I
6
I
27=I
a-I
26=I
a-(I
1+ I
2+ I
3+ I
4+ I
5+ I
6) formula (1)
I
28＝I
27-I
7＝I
A-(I
1+I
2+I
3+I
4+I
5+I
6+I
7)
I
29＝I
28-I＝I
A-(I
1+I
2+I
3+I
4+I
5+I
6+I
7+I)
I
210＝I
29-I
8＝I
A-(I
1+I
2+I
3+I
4+I
5+I
6+I
7+I
8+I)
I
211＝I
210-I
9＝I
A-(I
1+I
2+I
3+I
4+I
5+I
6+I
7+I
8+I
9+I)
I
212＝I
211+I
B＝(I
A+I
B)-(I
1+I
2+I
3+I
4+I
5+I
6+I
7+I
8+I
9+I)
I
213＝I
212-I
10＝(I
A+I
B)-(I
1+I
2+I
3+I
4+I
5+I
6+I
7+I
8+I
9+I
10+I)＝-I
C
I
11＝i
1
I
12＝I
11+i
2＝i
1+i
2
I
13＝I
12+i
3＝i
1+i
2+i
3
I
14＝I
13+i
4＝i
1+i
2+i
3+i
4
I
15＝I
14+i
5＝i
1+i
2+i
3+i
4+i
5
I
16＝I
15+i
6＝i
1+i
2+i
3+i
4+i
5+i
6
I
17=i
a-i
16=i
a-(i
1+ i
2+ i
3+ i
4+ i
5+ i
6) formula (2)
I
18＝I
17-i
7＝i
A-(i
1+i
2+i
3+i
4+i
5+i
6+i
7)
I
19＝I
18+I＝(i
A+I)-(i
1+i
2+i
3+i
4+i
5+i
6+i
7)
I
110＝I
19-i
8＝(i
A+I)-(i
1+i
2+i
3+i
4+i
5+i
6+i
7+i
8)
I
111＝I
110-i
9＝(i
a+I)-(i
1+i
2+i
3+i
4+i
5+i
6+i
7+i
8+i
9)
I
112＝I
111+i
b＝(i
a+i
b+I)-(i
1+i
2+i
3+i
4+i
5+i
6+i
7+i
8+i
9)
I
113＝I
112-i
10＝(i
a+i
b+I)-(i
1+i
2+i
3+i
4+i
5+i
6+i
7+i
8+i
9+i
10)＝-i
c
It should be noted that, this application example has just been enumerated a wherein phase, and in application, the situation of three-phase all can be processed by same mode.
In formula, each section of load current I of bus
11-I
113and I
21-I
213for unknown quantity, other load current is known quantity, and these known quantities are divided into following three classes:
(1) outlet class
Taking Buddhist sea line as example, corresponding line is 131 circuits, for I
1, while only having 131 switches (switches on 131 circuits) and 1312 disconnecting links (disconnecting links on 131 circuits) to close, just there is actual value simultaneously, logically belong to "AND" relation.When closed according to switch in EMS system, disconnecting link, quantity of state is described as 2, and when disconnection, quantity of state is described as 1, so, I1 can be expressed as follows:
I
1＝(Z
131-1)′(Z
1312-1)′I
131
In formula, Z
131for the quantity of state of switch is described, Z
1312for the quantity of state of disconnecting link is described, I
131be the load current of 131 circuits, can from the characteristic quantity database of EMS system, obtain.
In like manner, i
1=(Z
131-1) ' (Z
1311-1) ' I
131, other circuit is done similar processing.
(2) main-transformer class
Taking #1 main-transformer as example, similar with circuit outlet, only have in change and when switch and bus bar side disconnecting link close, just to have actual value simultaneously, so, can be by I
aand i
abe expressed as follows:
I
A＝(Z
101-1)′(Z
1012-1)′I
101
i
A＝(Z
101-1)′(Z
1011-1)′I
101
In like manner, other main-transformer also can do similar processing.
(3) bus connection switch class
In diagram, only have a mother interval (being exemplified as 100 mother intervals at this) in 110kV GIS equipment, in upper figure, the load current collection value of bus connection switch is I
100, can from EMS system character database, obtain, then according to its load current direction of forward current orientation determination of setting (it is positive current direction that setting electric current flows to 1M by 2M).
Shown in figure 4, Fig. 4 is the process flow diagram of determining the load current actual value of bus connection switch, mainly comprises the steps:
Step s1, the load current calculated value I of calculating bus connection switch
0=(Z
100-1) × (Z
1001-1) × (Z
1002-1) × I
100; Wherein, Z
100, Z
1001, Z
1002for the quantity of state of switch, disconnecting link, I
100for the load current collection value of the bus connection switch from EMS system acquisition.
Step s2, judges whether I equals 0, and if so, the load current actual value of bus connection switch equals 0, otherwise enters step s3.
Step s3, calculates the total offered load electric current I that flows into 2M '=I
a+ I
b+ I
c; And total outflow load current i '=I of calculating 2M outflow
1+ I
2+ ... I
10.
Step s4, judges whether I ' is greater than i ', if so, the load current actual value I=I of bus connection switch
100; Otherwise, I=-I
100.
In conjunction with the calculating of the different classes of electric current of above-mentioned three class, calculate successively I
1i
10, I, i
1i
10, I
a, I
b, I
c, i
a, i
b, i
c, by calculated value substitution formula (1) and formula (2), can ask the load current that obtains the each segmentation of GIS bus.
Step S50, carries out on-line monitoring according to the load current of each segmentation of described GIS bus to GIS bus.
This process be mainly according to GIS bus load situation, determine corresponding alarm threshold value, remind operation and testing crew to do corresponding work, ensure the stable operation of GIS device security.
In one embodiment, for the step of according to the load current of each segmentation of described GIS bus, GIS bus being carried out on-line monitoring, specifically comprise:
Step S501, by each circuit of GIS bus and GIS transformer station and transformer bay every topology diagram show, and show the load current of the each segmentation of GIS bus.
Step S502, determines corresponding alarm threshold value according to the specified load current of each segmentation of GIS bus.
Step S503, judges the load current of each segmentation of GIS bus according to described alarm threshold value.
Step S504, if exceed alarm threshold value, is arranged to different colours by corresponding segments on topology diagram and highlights.
The scheme of above-described embodiment, can by GIS bus and line related, transformer bay every real topology display, and show the load current of the each segmentation of GIS bus, if there is which section load current to occur reporting to the police, become different colours to highlight this subsection setup, to reach alarm warning function.
Taking certain 110kV GIS of transformer station as example, its rated current is 1250A, when 60% of a certain segmentation load current overrate in GIS bus, while exceeding 1250*60%=750A, by this segmentation with yellow mark; When 80% of a certain segmentation load current overrate in GIS bus, while exceeding 1250*80%=1000A, by this segmentation with red-label.
Technical scheme of the present invention, can be by utilizing signal transducer to gather the load current of the required each line of GIS bus, then gather these load current data and be transferred to main website, enter the database of EMS system, bonding apparatus account is associated with physical device again, taking the load current data of the each line of EMS system GIS equipment as basis, in conjunction with the quantity of state of each switch, calculate the value of each segmented current by the each segmented current computing method of bus, compare with GIS bus rated load electric current, set corresponding alarm threshold value, can carry out automatic diagnosis and whether exceed alarm threshold value, improve the sensitivity to GIS fault reaction, realize and not increasing under the condition of hardware device, obtain exactly the size of the each segmentation load current of GIS bus, realize the on-line monitoring to the each segmented current of GIS bus.
Technical scheme of the present invention, by the each segmentation load current of transformer station's GIS bus on-line monitoring, to instructing infrared measurement of temperature etc. that more direct reference quantity is provided, the utilization of infrared measurement of temperature in electric system should not be simple temperature index, the judgement of its accident defect need to be combined with correlation behavior amount, just can be unlikely to occur erroneous judgement and the situation of failing to judge, taking certain GIS of transformer station infrared measurement of temperature as example.
As shown in Figure 5, Fig. 5 is infrared measurement of temperature collection of illustrative plates schematic diagram, although there is the temperature difference of 1.3oC between GIS 2 air chambers, but can not therefore judge that one of them air chamber has problem, if there is no the situation of significant change at bus load electric current, there is above-mentioned phenomenon in infared spectrum, have reason to believe the inner existing problems of this GIS, processing immediately should have a power failure, if but the load current of higher that section of bus of air chamber of temperature increases because the reason of scheduling makes its electric current, cause this air chamber heating, air chamber temperature than side is high, so as long as air chamber is paid close attention to, after recovering, load current should temperature can decline thereupon.So the on-line monitoring of the each segmented current of GIS bus load provides more direct reference quantity to the judgement of the defect faults such as infrared measurement of temperature, for infrared detection technology and other test provide more reliable data reference, ensure the stable operation of GIS equipment, ensure power supply reliability, significant to the reference of GIS checking experiment.
As can be seen here, the technical scheme providing of the present invention, can realize the each segmented current of GIS bus is carried out to real time on-line monitoring, timely and effectively GIS is monitored, ensure GIS safe and stable operation, because GIS bus load electric current provides direct parameters of heating accident such as GIS contact, as a GIS conducting connecting part accident, the economic loss that its direct GIS damages just can reach 1,000,000 yuan of left and right, because conducting connecting part is the critical component of composition GIS bus, its fault will inevitably cause the even transformer damage of trip protection of transformer, cause no-voltage of entire station, and cause the multiple substation power loss of subordinate, its loss is sizable.Suppose that the arcing ground fault of conducting connecting part occurs in a 220kV GIS transformer station, cause 2, full station 240MVA main-transformer and therefore trip and move less 6h, and cause 7 110kV substation power loss of subordinate, loss electric weight is 2.88 × 106 degree, in 0.6 yuan/degree, economic loss reaches 172.8 ten thousand yuan.Visible, this technology can be avoided Similar Problems in time, the 172.8 ten thousand yuan of losses of can reducing the loss, and expection economic benefit is huge, promotion prospect is wide.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the GIS of a transformer station bus load electric current on-line monitoring method, is characterized in that, comprises the steps:
Draw the distribution plan of GIS equipment interval according to the GIS of transformer station site layout project information;
According to described distribution plan and in conjunction with transformer station's actual physics information, GIS bus is carried out to segmentation;
From the quantity of state of load current, switch and the disconnecting link of the each circuit of EMS system acquisition transformer station;
Calculate the load current of each segmentation of GIS bus by Kirchhoff's law and according to described load current and quantity of state;
According to the load current of each segmentation of described GIS bus, GIS bus is carried out to on-line monitoring.
2. the GIS of transformer station bus load electric current on-line monitoring method according to claim 1, is characterized in that, by Kirchhoff's law and according to the step of the load current of described load current and each segmentation of quantity of state calculating GIS bus, comprising:
By Kirchhoff's law and set up the computation model of GIS bus load electric current based on each segmentation of described GIS bus;
According to the positive current direction of described computation model and setting, set up the node current equation of each segmentation of GIS bus;
By node current equation described in the quantity of state substitution of the load current of each GIS transformer station circuit, switch and disconnecting link, calculate the load current of each segmentation of GIS bus.
3. the GIS of transformer station bus load electric current on-line monitoring method according to claim 2, it is characterized in that, described by node current equation described in the quantity of state substitution of the load current of each GIS transformer station circuit, switch and disconnecting link, the step that calculates the load current of each segmentation of GIS bus, comprising:
Obtain the switch on load current and the circuit thereof of each transformer inlet wire of GIS transformer station, the quantity of state of disconnecting link, and the switch on load current and the circuit thereof of circuit outlet, the quantity of state of disconnecting link;
The quantity of state of the switch on the load current of transformer inlet wire and circuit thereof, disconnecting link is carried out to logical operation, obtain the load current actual value of transformer inlet wire;
The quantity of state of the switch on the load current of circuit outlet and circuit thereof, disconnecting link is carried out to logical operation, obtain the load current actual value of circuit outlet;
Obtain the total load electric current of load current, inflow and the outflow GIS bus of the bus connection switch of GIS transformer station, and determine the direction of current of the load current of described total bus connection switch according to the positive current direction of setting and total load electric current, obtain the load current actual value of bus connection switch;
By node current equation described in the load current substitution of the load current of the load current actual value of described transformer inlet wire, circuit outlet and the bus connection switch with direction, calculate the load current of each segmentation of GIS bus.
4. the GIS of transformer station bus load electric current on-line monitoring method according to claim 3, is characterized in that, the quantity of state of described switch, disconnecting link value in the time of switch, disconnecting link closure is 2, and when disconnection, value is 1;
Described the quantity of state of the switch on the load current of transformer inlet wire and circuit thereof, disconnecting link is carried out to logical operation, obtains the step of the load current actual value of transformer inlet wire, comprise following formula:
I
1＝(Z
1-1)′(Z
10-1)′I
1'
In formula, I
1for the load current actual value of transformer inlet wire, Z
1for the quantity of state of switch, Z
10for the quantity of state of disconnecting link, I
1' be the load current of transformer inlet wire;
The quantity of state of the switch on the load current of circuit outlet and circuit thereof, disconnecting link is carried out to logical operation, obtains the step of the load current actual value of circuit outlet, comprise following formula:
I
2＝(Z
2-1)′(Z
20-1)′I
2'
In formula, I
2for the load current actual value of circuit outlet, Z
2for the quantity of state of switch, Z
20for the quantity of state of disconnecting link, I
2' be the load current of circuit outlet.
5. the GIS of transformer station bus load electric current on-line monitoring method according to claim 3, it is characterized in that, obtain the total load electric current of load current, inflow and the outflow GIS bus of the bus connection switch of GIS transformer station, and determine the direction of current of the load current of described total bus connection switch according to the positive current direction of setting and total load electric current, the step that obtains the load current actual value of bus connection switch, comprising:
According to the positive current direction of setting, the quantity of state of the load current collection value of the bus connection switch obtaining and switch, disconnecting link is carried out to logical operation, obtain the load current calculated value of bus connection switch.
Whether the load current that judges actual bus connection switch is 0, and if so, the load current actual value of bus connection switch equals 0, otherwise, calculate and flow into total offered load electric current of GIS bus and total outflow load current that GIS bus flows out.
Judge whether total offered load electric current is greater than total outflow load current, if, the load current actual value of bus connection switch equals load current collection value, and direction is consistent with the positive current direction of setting, if not, the load current actual value of bus connection switch equals load current collection value, and the positive current opposite direction of direction and setting.
6. according to the GIS of the transformer station bus load electric current on-line monitoring method described in claim 1 to 5 any one, it is characterized in that, described step of according to the load current of each segmentation of described GIS bus, GIS bus being carried out on-line monitoring, comprising:
By each circuit of GIS bus and GIS transformer station and transformer bay every topology diagram show, and show the load current of the each segmentation of GIS bus;
Determine corresponding alarm threshold value according to the specified load current of each segmentation of GIS bus;
Judge the load current of each segmentation of GIS bus according to described alarm threshold value;
If exceed alarm threshold value, corresponding segments on topology diagram is arranged to different colours and highlights.
7. the GIS of transformer station bus load electric current on-line monitoring method according to claim 1, is characterized in that, from the step of the quantity of state of load current, switch and the disconnecting link of the each circuit of EMS system acquisition transformer station, comprising:
Gather the load current data of GIS transformer station each transformer inlet wire and circuit outlet in operational process by signal transducer;
The load current data-signal that signal transducer is produced gathers and transfers to EMS system;
Described load current data and the actual physics figure of the GIS of transformer station equipment are carried out associatedly in EMS system, obtain the characteristic quantity database of GIS bus load current monitoring;
From described characteristic quantity database, read in real time each transformer inlet wire of GIS transformer station and the load current of circuit outlet.
8. the GIS of transformer station bus load electric current on-line monitoring method according to claim 7, is characterized in that, the precision of described signal transducer is 0.5 grade.
9. the GIS of transformer station bus load electric current on-line monitoring method according to claim 7, it is characterized in that, the load current data-signal that signal transducer is produced gathers and transfers to the mode of transmitting in EMS system and comprises: when the load current data of signal picker exceed threshold value, active upload is to EMS system
Or
EMS system main website periodically carries out polling signal sensor and obtains load current data.
For the transmission of load current data-signal, can adopt main website to inquire system downwards, comprise two kinds of modes: the first is that data exceed threshold value (this threshold value general set larger) time and upload; The second is that main website periodically carries out poll.
10. the GIS of transformer station bus load electric current on-line monitoring method according to claim 1, is characterized in that, described GIS equipment comprises 110kV～500kV GIS equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245627.3A CN103995172B (en) | 2014-06-04 | 2014-06-04 | Method for on-line monitoring of load current of GIS bus of substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245627.3A CN103995172B (en) | 2014-06-04 | 2014-06-04 | Method for on-line monitoring of load current of GIS bus of substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103995172A true CN103995172A (en) | 2014-08-20 |
| CN103995172B CN103995172B (en) | 2017-01-18 |
Family
ID=51309392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410245627.3A Active CN103995172B (en) | 2014-06-04 | 2014-06-04 | Method for on-line monitoring of load current of GIS bus of substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103995172B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792362A (en) * | 2015-04-14 | 2015-07-22 | 国家电网公司 | Method for monitoring load and temperature of 10kV switching station and based on Hisoon database |
| 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 |
| CN107870355A (en) * | 2017-11-06 | 2018-04-03 | 西南交通大学 | A kind of kirchhoff type beam deviation method under MODEL OVER COMPLEX TOPOGRAPHY |
| CN109390939A (en) * | 2018-11-23 | 2019-02-26 | 国网江苏省电力有限公司检修分公司 | A kind of bus based on amperometry falls the differential diagnostic method that isolation plug-in strip not exclusively closes a floodgate when arranging operation |
| 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 |
| CN113108920A (en) * | 2021-04-13 | 2021-07-13 | 广东省源天工程有限公司 | Method for detecting 110kv voltage GIS disconnecting link based on DR imaging technology |
| CN113295910A (en) * | 2021-05-14 | 2021-08-24 | 马鞍山电力规划勘察设计院有限责任公司 | Split type clamp type current transformer and transformer substation line surveying and mapping method |
| CN114123507A (en) * | 2021-11-23 | 2022-03-01 | 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 |
| CN114325063A (en) * | 2021-12-23 | 2022-04-12 | 广东电网有限责任公司 | Method and system for generating double-bus current distribution |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664598A (en) * | 2005-03-29 | 2005-09-07 | 万忠泽 | Method for automatically orientating line fault of electrical power system by using time mark grouping |
| CN101068078A (en) * | 2007-06-05 | 2007-11-07 | 北海银河高科技产业股份有限公司 | Small current earthing wire-selecting method |
| CN101710158A (en) * | 2008-12-09 | 2010-05-19 | 北京机械工业学院 | Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment |
| CN101958544A (en) * | 2010-08-11 | 2011-01-26 | 金华电业局 | System and method for calculating line loss rate of electric power distribution line |
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| CN102508103A (en) * | 2011-11-11 | 2012-06-20 | 中国电力科学研究院 | Distribution network hidden short-circuit fault risk early-warning and positioning method based on distributed intelligent agents |
| KR101180008B1 (en) * | 2010-12-31 | 2012-09-06 | 박기주 | plug-in box control unit for monitoring bus bar |
| KR101231705B1 (en) * | 2011-03-03 | 2013-02-08 | 한전케이디엔주식회사 | Validity verification method for setting determination of distance relay setting |
| KR101295779B1 (en) * | 2011-09-26 | 2013-08-16 | 한국남부발전 주식회사 | Total monitoring apparatus of power distributing board |
| CN103823138A (en) * | 2014-02-25 | 2014-05-28 | 胡兴耀 | Circuit for monitoring power supply line electric parameters with auxiliary line |
-
2014
- 2014-06-04 CN CN201410245627.3A patent/CN103995172B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664598A (en) * | 2005-03-29 | 2005-09-07 | 万忠泽 | Method for automatically orientating line fault of electrical power system by using time mark grouping |
| CN101068078A (en) * | 2007-06-05 | 2007-11-07 | 北海银河高科技产业股份有限公司 | Small current earthing wire-selecting method |
| CN101710158A (en) * | 2008-12-09 | 2010-05-19 | 北京机械工业学院 | Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment |
| CN101958544A (en) * | 2010-08-11 | 2011-01-26 | 金华电业局 | System and method for calculating line loss rate of electric power distribution line |
| KR101180008B1 (en) * | 2010-12-31 | 2012-09-06 | 박기주 | plug-in box control unit for monitoring bus bar |
| KR101231705B1 (en) * | 2011-03-03 | 2013-02-08 | 한전케이디엔주식회사 | Validity verification method for setting determination of distance relay setting |
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| KR101295779B1 (en) * | 2011-09-26 | 2013-08-16 | 한국남부발전 주식회사 | Total monitoring apparatus of power distributing board |
| CN102508103A (en) * | 2011-11-11 | 2012-06-20 | 中国电力科学研究院 | Distribution network hidden short-circuit fault risk early-warning and positioning method based on distributed intelligent agents |
| CN103823138A (en) * | 2014-02-25 | 2014-05-28 | 胡兴耀 | Circuit for monitoring power supply line electric parameters with auxiliary line |
Non-Patent Citations (1)
| Title |
|---|
| 汪永华等: "基于SCADA/EMS的负荷实测与网损在线计算的研究与应用", 《安徽电气工程职业技术学院学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792362A (en) * | 2015-04-14 | 2015-07-22 | 国家电网公司 | Method for monitoring load and temperature of 10kV switching station and based on Hisoon database |
| 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 |
| CN107870355A (en) * | 2017-11-06 | 2018-04-03 | 西南交通大学 | A kind of kirchhoff type beam deviation method under MODEL OVER COMPLEX TOPOGRAPHY |
| CN109390939A (en) * | 2018-11-23 | 2019-02-26 | 国网江苏省电力有限公司检修分公司 | A kind of bus based on amperometry falls the differential diagnostic method that isolation plug-in strip not exclusively closes a floodgate when arranging operation |
| CN109390939B (en) * | 2018-11-23 | 2021-10-08 | 国网江苏省电力有限公司检修分公司 | Differential diagnosis method for incomplete closing of isolation knife switch during bus inversion operation based on current analysis |
| 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 |
| CN113108920A (en) * | 2021-04-13 | 2021-07-13 | 广东省源天工程有限公司 | Method for detecting 110kv voltage GIS disconnecting link based on DR imaging technology |
| CN113295910A (en) * | 2021-05-14 | 2021-08-24 | 马鞍山电力规划勘察设计院有限责任公司 | Split type clamp type current transformer and transformer substation line surveying and mapping method |
| 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 |
| CN114123507A (en) * | 2021-11-23 | 2022-03-01 | 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 |
| CN114325063A (en) * | 2021-12-23 | 2022-04-12 | 广东电网有限责任公司 | Method and system for generating double-bus current distribution |
| CN114325063B (en) * | 2021-12-23 | 2024-04-19 | 广东电网有限责任公司 | Double-bus current distribution generation method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103995172B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103995172A (en) | Method for on-line monitoring of load current of GIS bus of substation | |
| CN105866615A (en) | 10kV power distribution line disconnection fault judging method based on three-phase voltage current | |
| CN106950440B (en) | Substation's metering critical point is abnormal quickly to judge alarm method | |
| CN203084097U (en) | On-line zinc oxide lightning arrester state monitoring device | |
| CN103616579B (en) | Fault diagnosis method used for intelligent substation secondary system | |
| CN110658415B (en) | Low-voltage distribution line fault detection method and system | |
| CN104297629A (en) | Method for detecting and positioning section faults of a power distribution network containing distributed generators | |
| CN103941079B (en) | Power distribution network PT on-line monitoring and fault diagnosis system | |
| CN102798776B (en) | Multi-parameter fused substation data integrity checking method | |
| CN207281225U (en) | Transient current harvester and power distribution network service cable line fault alignment system | |
| CN103983885A (en) | Low-voltage circuit fault locating terminal and method used for power distribution substation region | |
| CN106646130B (en) | A kind of active distribution network Fault Locating Method compared based on current polarity and system | |
| CN103986238B (en) | Intelligent substation fault diagnosis method based on probability weighting bipartite graph method | |
| CN109782060A (en) | A kind of lean line loss analysis system | |
| CN104849602A (en) | GIS double-bus distribution equipment fault detection method and system | |
| CN105510754A (en) | Dual AD sampling inconsistency judging method for intelligent substation | |
| CN104297628A (en) | Method for detecting and positioning section faults of power distribution network containing DGs (distributed generators) | |
| CN104714128A (en) | Online arrester monitoring system | |
| CN106505533A (en) | A kind of distance protection system and its control method suitable for half-wave power transmission circuit | |
| CN103616616B (en) | Fault detection method for large-scale grounding grid | |
| CN104215879A (en) | Method and system for locating short-circuit faults of power distribution networks | |
| Ananthan et al. | Model-based approach integrated with fault circuit indicators for fault location in distribution systems | |
| CN103941160B (en) | Power distribution network loop closing detection device and method | |
| CN203164360U (en) | Transformer device insulation online monitoring system | |
| CN105486930B (en) | With silicon chain direct current system bus to the detection device and method of ground resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |