CN108614195A - Substation PT N600 ground connection on-line monitoring positioning device and method - Google Patents

Substation PT N600 ground connection on-line monitoring positioning device and method Download PDF

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Publication number
CN108614195A
CN108614195A CN201810660036.0A CN201810660036A CN108614195A CN 108614195 A CN108614195 A CN 108614195A CN 201810660036 A CN201810660036 A CN 201810660036A CN 108614195 A CN108614195 A CN 108614195A
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China
Prior art keywords
signal
ground connection
module
monitoring
branch
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CN201810660036.0A
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Chinese (zh)
Inventor
徐兴发
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Guangdong Power Grid Co Ltd
Shaoguan Power Supply Bureau Guangdong Power Grid Co Ltd
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Guangdong Power Grid Co Ltd
Shaoguan Power Supply Bureau Guangdong Power Grid Co Ltd
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Application filed by Guangdong Power Grid Co Ltd, Shaoguan Power Supply Bureau Guangdong Power Grid Co Ltd filed Critical Guangdong Power Grid Co Ltd
Priority to CN201810660036.0A priority Critical patent/CN108614195A/en
Publication of CN108614195A publication Critical patent/CN108614195A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/088Aspects of digital computing

Abstract

The embodiment of the present application provides a kind of substation PT N600 ground connection on-line monitoring positioning device and method, is related to voltage transformer technical field.Equipment includes:First monitoring device, the first monitoring device with the one point earth point of bis- N600 of transformer substation voltage mutual inductor PT for connecting.M the second monitoring devices, each second monitoring device with each branch for connecting correspondingly in M the second monitoring devices.Processing unit, processing unit is connect with the first monitoring device and M the second monitoring devices respectively, the first signal that processing unit is used to be monitored according to the first monitoring device, and N number of second signal is monitored according to N number of second monitoring device in M the second monitoring devices, determine that N600 ground connection, the N point ground connection informations that generation N600 is grounded to external host computer occur for the N branch that N number of second monitoring device is correspondingly connected with.It can understand so that operation maintenance personnel is based on host computer, accurately and quickly know specific fault point, improve troubleshooting efficiency, reduce O&M cost.

Description

Substation PT N600 ground connection on-line monitoring positioning device and method
Technical field
This application involves technical field of electric equipment, are grounded and monitor on-line in particular to a kind of substation PT N600 Positioning device and method.
Background technology
Currently, power equipment is by by the neutral ground of PT in substation bis- times, to ensure normal operation.But in reality In operation, due to design, construction, ageing equipment, insulation breakdown etc., power equipment voltage transformer pt may be caused secondary There is at least two points ground fault situation and occur in neutral point.At least two points ground fault situation occur can cause the voltage-phase of neutral point inclined It moves, so as to cause the distance protection of power equipment and/or zero-sequence voltage injection refused action or malfunction.
Invention content
The application is to provide a kind of substation PT N600 ground connection on-line monitoring positioning device and method.
Embodiments herein is realized in the following way:
In a first aspect, the embodiment of the present application provides a kind of substation PT N600 ground connection on-line monitoring positioning device, including: First monitoring device, first monitoring device are used to connect with the one point earth point of bis- N600 of transformer substation voltage mutual inductor PT It connects.M the second monitoring devices, in the M the second monitoring devices each second monitoring device for correspondingly with each Branch connects, wherein each branch is connect with the earth point, and M is the integer not less than 1.Processing unit, the processing dress It sets and connect respectively with first monitoring device and the M the second monitoring devices, the processing unit is for according to described the The first signal that one monitoring device monitors, and monitored according to N number of second monitoring device in the M the second monitoring devices N number of second signal determines that N600 ground connection occurs for the N branch that N number of second monitoring device is correspondingly connected with, generates N600 ground connection N point ground connection informations and be sent to external host computer, wherein N is positive integer no more than M.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the processing unit packet It includes:Sampling module, the sampling module is connect with first monitoring device and the M the second monitoring devices respectively, described Sampling module is used to the first signal that first monitoring device monitors being amplified and conversion process, and treated for acquisition First signal, and N number of second monitoring device in the M the second monitoring devices is monitored that N number of second signal is amplified And conversion process, obtain treated N number of second signal.Processing module, the processing module are connect with the sampling module, institute State processing module for according to described in treated the first signal and described treated that N number of second signal determines described N number of the N600 ground connection occurs for the N branch that two monitoring devices are correspondingly connected with, and generates N point ground connection informations.Communication module, the communication mould Block is connect with the processing module, and the communication module is used to the N points ground connection information being transmitted to external host computer.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the sampling module packet It includes:Sampling unit, the sampling unit connect with first monitoring device and the M the second monitoring devices, are used for respectively The first signal that first monitoring device monitors is obtained, and obtains N number of second monitoring in M second monitoring device Device monitoring is to N number of second signal.Amplifying unit, for first signal to be amplified, amplified first signal of acquisition, with And amplify N number of second signal, obtain amplified N number of second signal.Converting unit, for by described amplified the One signal analog-to-digital conversion process, obtains treated the first signal, and by amplified N number of second signal analog-to-digital conversion Processing obtains treated N number of second signal.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the first monitoring dress It is current transformer to set with the M the second monitoring devices.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the processing unit is also Including:Relay module, the relay module are connect with the processing module, and the relay module is used for according to the processing module Drive the first circuit and second servo loop in itself equal based on the closure trigger signal for determining N branch generation N600 ground connection and generating In closed state.Police instruction module, the police instruction module are connect with first circuit, the police instruction module For in first circuit closed, obtaining the electric energy in first circuit and shining, to indicate N item branch by shining N600 ground connection occurs for road.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the processing unit is also Including:Alarm output module, the alarm output module are connect with the second servo loop, and the alarm output module is used in institute State second servo loop in the closure state, it is concurrent to generate warning trigger signal based on the electric energy obtained from the second servo loop It send to external host computer.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the processing unit is also Including:Reseting module, the reseting module are connect with the relay module, and the reseting module is for responding the user detected The reset operation of input generates reset trigger signal, so that first circuit of the relay module is believed in the reset trigger Number driving under be adjusted to be off the driving with the second servo loop in the reset trigger signal by closed state Under be adjusted to be off by closed state.
In conjunction with the technical solution that above-mentioned first aspect provides, in some possible realization methods, the processing unit is also Including:Display module, the display module are connect with the processing module, and the display module is for giving birth to the processing module At the N points ground connection information show.
Second aspect, the embodiment of the present application provide a kind of substation PT N600 ground connection on-line monitoring localization method, application Positioning device is monitored on-line in the substation PT N600 ground connection, the method includes:Obtain the monitored on earth point One signal, and obtain N number of second signal that N items branch road monitors in M branch, wherein it is each propped up in the M branch Earth point described in Lu Junyu connects, and M is the integer not less than 1, and N is the positive integer no more than M;According to first signal, with And according to N number of second signal, determine that N600 ground connection occurs for the N branch;Generate the N points ground connection information of N600 ground connection simultaneously It is sent to external host computer.
It is described according to described the in some possible realization methods in conjunction with the technical solution that above-mentioned first aspect provides One signal, and according to N number of second signal, determine that N points ground connection occurs for the N branch, including:Believe according to described first It number determines that at least two points ground fault occurs more than threshold value;It is all higher than according to each second signal in N number of second signal described Threshold value, it is that N600 ground connection occurs for the corresponding N branch of N number of second signal to determine to occur at least two points ground fault.
The third aspect, the embodiment of the present application provide a kind of non-volatile program code that can perform with processing unit Computer-readable storage media, said program code make the processing unit execute substation PT N600 ground connection on-line monitoring positioning Method.
The advantageous effect of the embodiment of the present application is:
When there is at least two points ground fault of grounding in addition to bis- one point earth points of transformer substation voltage mutual inductor PT, lead to Crossing the monitoring of the first monitoring device can monitor that the first signal occurs in earth point, and can be supervised by N number of second monitoring device Measure N number of second signal of N branch appearance.Therefore processing unit is based on the first signal and N number of second signal can be real-time It determines in addition to earth point, N600 ground connection has occurred in N branch.Processing unit generates the N points ground connection letter for N600 ground connection It ceases and is sent to external host computer so that operation maintenance personnel, which is based on host computer, can understand, accurately and quickly know specific failure Point greatly improves troubleshooting efficiency, reduces the consuming of manpower and energy, and also reduces the O&M cost of equipment.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present application Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides First structure block diagram;
Fig. 2 shows a kind of substation PT N600 ground connection that the application first embodiment provides to monitor positioning device on-line Second structure diagram;
Fig. 3 shows a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides Third structure diagram;
Fig. 4 is shown in a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides The structural schematic diagram of sampling module;
Fig. 5 is shown in a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides Part of module circuit diagram;
Fig. 6 is shown in a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides Display module display interface the first surface chart;
Fig. 7 is shown in a kind of substation PT N600 ground connection on-line monitoring positioning devices that the application first embodiment provides Display module display interface second contact surface figure;
Fig. 8 shows the application the and two kinds of substation PT N600 ground connection on-line monitoring localization methods that embodiment provides First pass figure;
Fig. 9 shows the application the and a kind of substation PT N600 ground connection on-line monitoring localization methods that embodiment provides Second flow chart.
Icon:10- substation PTs N600 ground connection on-line monitoring positioning devices;The first monitoring devices of 100-;200- second is supervised Survey device;300- processing units;310- sampling modules;311- shells;The connectivity ports 312-;313- output interfaces;314- powers Interface;315- sampling units;316- amplifying units;317- converting units;320- threshold setting modules;330- timing modules; 340- processing modules;350- memory modules;360- communication modules;370- police instruction modules;380- alarm output modules;390- Relay module;The first circuits 391-;392- second servo loops;The first normal opened contacts of 393-;The second normal opened contacts of 394-;395- first Switch;396- second switches;301- reseting modules;302- display modules.
Specific implementation mode
Currently, to ensure voltage transformer reliability of operation, the neutral ground situation to voltage transformer is needed Carry out double check.For example, operation maintenance personnel should by regular time interval, on schedule to voltage transformer neutral ground Situation is checked.
But inventor has found by long-term practical studies, once there is voltage transformer neutral point due to multipoint earthing Cause to occur malfunctioning or the accident of refused action after, operation maintenance personnel can not determine in such a way that routine checks on schedule Failure, therefore operation maintenance personnel is needed to debug by checking again for results in troubleshooting efficiency occur low, greatly in this way Labor intensive and energy, the too high technical problem of O&M cost.
Defect present in the above scheme in the prior art, is that inventor is obtaining after putting into practice and carefully studying As a result, therefore, the solution that the discovery procedure of the above problem and hereinafter the embodiment of the present application are proposed regarding to the issue above Scheme all should be the contribution that inventor makes the application during the application.
Based on the studies above, the embodiment of the present application provide a kind of substation PT N600 ground connection on-line monitoring positioning device and Method.When there is at least two points ground fault of grounding in addition to earth point, can be monitored by the monitoring of the first monitoring device There is the first signal in earth point, and can monitor N number of second signal that N branch occurs by N number of second monitoring device. Therefore processing unit is based on the first signal and N number of second signal and can determine in addition to earth point that N branch has occurred in real time N600 is grounded.Processing unit generates the N point ground connection informations for N600 ground connection and is sent to external host computer so that O&M people Member can be understood based on host computer, accurately and quickly be known specific fault point, greatly improved troubleshooting efficiency, reduced people The consuming of power and energy, and also reduce the O&M cost of equipment.
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete Ground describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Usually exist The component of the embodiment of the present application described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause This, the detailed description of the embodiments herein to providing in the accompanying drawings is not intended to limit claimed the application's below Range, but it is merely representative of the selected embodiment of the application.Based on embodiments herein, those skilled in the art are not doing The every other embodiment obtained under the premise of going out creative work, shall fall in the protection scope of this application.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Term " first ", " the Two " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
First embodiment
It please refers to Fig.1 and Fig. 2, the embodiment of the present application provides a kind of substation PT N600 ground connection on-line monitoring positioning device 10, substation PT N600 ground connection monitors positioning device 10 on-line and includes:First monitoring device 100,200 and of the second monitoring device Processing unit 300.Wherein, the first monitoring device 100 and the second monitoring device 200 are connect with processing unit 300, and handle dress Setting 300 can connect with external host computer.
In this present embodiment, the first monitoring device 100 and the second monitoring device 200 all can be the pincerlike electric current of high-precision it is mutual Sensor.First monitoring device 100 can be realized and connect with this with cramp joint at the earth point of the secondary neutral conductor N600 of voltage transformer pt Place connects, and the earth point can be then the earth point of the neutral point of secondary side winding in voltage transformer.In the substation Also there is M branch being connect with the neutral point, i.e. M branch is also connect with the earth point, to go to connect it by M branch Its equipment simultaneously realizes corresponding function, wherein M is the integer not less than 1.For the monitoring for realizing to M branch, the second monitoring dress The quantity for setting 200 may be M, and each second monitoring device 200 is for one-to-one in M the second monitoring devices 200 It is connect with each branch on each road with cramp joint.
If in the case that voltage transformer works normally, the first monitoring device 100 can monitor there is electric current at earth point First signal of normal in size and each second monitoring device 200 can also monitor that corresponding each branch road has electric current The second signal of normal in size.
If at least two points ground fault including earth point occurs in voltage transformer, i.e. at least one branch is grounded, So at least two points ground fault may result in ground connection branch road and earth point at there is high current.At this point, the first monitoring device 100 can monitor to be more than the first signal of normal size with size of current on ground wire, and connect with the branch of ground connection Second monitoring device 200 can monitor the second signal with size of current more than normal size at earth point.I.e. in M branch In when having the case where N branch is grounded, the first signal that the first monitoring device 100 monitors, and one by one with N branch It is correspondingly connected with N number of second monitoring device 200 and monitors N number of second signal.Wherein, it is monitored based on the high current in branch The current value of second signal is the 50mA more than normal condition, and the first signal monitored based on the high current at earth point Current value can be then N number of second signal current value summation, N is positive integer no more than M.
First monitoring device 100 and M the second monitoring devices 200 are connect with processing unit 300, therefore the first monitoring device 100 can export the first signal to each monitoring device in processing unit 300 and N number of second monitoring device 200 then Each second signal can be exported to processing unit 300.
Referring to Fig. 3, the first signal that processing unit 300 can be used for being monitored according to the first monitoring device 100, and N number of second signal is monitored according to N number of second monitoring device 200 in M the second monitoring devices 200, determines N number of second monitoring dress It sets the N grounding that 200 are correspondingly connected with and N600 ground connection occurs, generate the N point ground connection informations of N600 ground connection and be sent to outside Host computer.
Specifically, processing unit 300 may include:Sampling module 310, threshold setting module 320, timing module 330, place Manage module 340, memory module 350, communication module 360, relay module 390, police instruction module 370, alarm output module 380, reseting module 301 and display module 302.
As shown in Figure 3 and Figure 4,310 overall structure of sampling module is as shown in figure 4, sampling module 310 has shell 311, shell Multiple connectivity ports 312 are provided on body 311, each connectivity port 312 is used to the first prison of connection in multiple connectivity ports 312 Survey device 100 or the second monitoring device 200.For example, the quantity of the connectivity port 312 on shell 311 is 14, then show to sample Module 310 can at most connect totally 14 the first monitoring devices 100 and/or the second monitoring device 200 simultaneously.Simultaneously, shell Body 311 is equipped with the output interface 313 for being connect with processing module 340, for example, output interface 1 and output interface 2.Separately Outside, it is additionally provided with power supply interface 314, for example, P+ interfaces, PE interfaces and P- interfaces on shell 311, is connected by power supply interface 314 Power supply obtains the direct current signal of 24V, then can be that each unit of sampling module 310 is powered, ensure the normal work of sampling module 310 Make.
Sampling module 310 includes:Sampling unit 315, amplifying unit 316 and converting unit 317.Wherein, sampling module 310 Power supply outside connection is powered, and sampling module 310 connects with the first monitoring device 100 and M the second monitoring devices 200 respectively It connects and sampling module 310 is connect with processing module 340, as:Sampling unit 315 connects the connection of multiple connectivity ports 312, To be connect respectively with the first monitoring device 100 and M the second monitoring devices 200 by multiple connectivity ports 312 by connection, put Big unit 316 is connect with sampling unit 315 and converting unit 317 respectively and converting unit 317 connects output interface 313, with It is connect with processing module 340 by output interface 313.
Sampling unit 315 can be the sample circuit of conventional type number, and sampling unit 315 can pass through above-mentioned connectivity port The first signal that 312 the first monitoring devices 100 of acquisition monitor, and obtain N number of second prison in M the second monitoring devices 200 It surveys device 200 and monitors N number of second signal.First signal can be filtered by sampling unit 315, to filter out first The first signal is exported to amplifying unit 316 after interference in signal.And sampling unit 315 can also be by N number of second letter It number is filtered, to export N number of second signal to amplifying unit 316 after filtering out the interference in N number of second signal.
Amplifying unit 316 can be mainly to be made of two stage amplifer, and every grade of amplifier may each be the amplifier of model LM332 Chip.For amplifying unit 316 when obtaining the first signal and N number of second signal, amplifying unit 316 can by internal two stage amplifer To amplify the first signal, amplified first signal is obtained, and N number of second signal can be amplified, obtain amplified N A second signal.To which amplifying unit 316 again exports amplified first signal and amplified N number of second signal to conversion Unit 317.
Converting unit 317 can be the analog-digital converter of conventional type number.Converting unit 317 is obtaining amplified first letter Number and when amplified N number of second signal, converting unit 317 can be by amplified first signal analog-to-digital conversion process, acquisition Treated the first signal, and by amplified N number of second signal analog-to-digital conversion process, N number of second letter that obtains that treated Number.Converting unit 317 again then can will treated the first signal and treated N number of the by above-mentioned output interface 313 Binary signal is exported to processing module 340.
It should be noted that M-N the second monitoring devices 200 in addition to N number of second monitoring device 200 are in whole flow process Also the normal M-N second signal of corresponding M-N items branch road can be monitored, and processing module 340 is also not only with regard to M second Signal is judged, also normally M-N second signal can should similarly be judged.
Referring to Fig. 3, threshold setting module 320 can be IC chip, threshold setting module 320 and processing module 340 connections, and threshold setting module 320 connects external power supply and is powered.In the present embodiment, user can write threshold value and set Program in cover half block 320, to will determine that the threshold value of needs is arranged and stores in threshold setting module 320, convenient for processing Module 340 calls the threshold value being stored in threshold setting module 320 to be used to judge.
Timing module 330 can be IC chip, and timing module 330 is connect with processing module 340, and timing module Power supply outside 330 connections is powered.In the present embodiment, timing module 330 can be obtained by the way that lasting timing is lasting Current time, convenient for processing module 340 call timing module 330 obtain current time come to occur at least two points ground fault when Quarter is recorded.
Processing module 340 can be the IC chip for having signal handling capacity, for example, microcontroller.In this implementation In example, processing module 340 can respectively with sampling module 310, memory module 350, communication module 360, relay module 390 and aobvious Show that module 302 connects, and processing module 340 connects external power supply and powered.Processing module 340 is obtaining that treated the When one signal and treated N number of second signal, processing module 340 can call the threshold value in threshold setting module 320 to sentence It is disconnected that treated whether the first signal is more than threshold value.
When being judged as NO, then at least two points ground fault does not occur for the judgement of processing module 340, and no longer executes subsequent alarm Etc. flows.Even if i.e. second signal is also greater than threshold value at this time, it is that at least two points ground fault has occurred also to be not enough to explanation, may It is other reasons, such as the equipment fault of branch connection.Therefore whether processing module 340 is judged more than threshold value based on the first signal Whether at least two points ground fault is occurred.
When being judged as YES, then branch of the judgement of processing module 340 in addition to earth point is grounded is grounded, i.e. judgement hair Raw at least two points ground fault.Therefore processing module 340 can be by judging whether each second signal is more than threshold value in M second signal To determine the specific location being grounded.Based on judgement, processing module 340 can determine there is N number of second in M second signal Signal is more than threshold value, and determines have M-N second signal to be not more than threshold value in M second signal.Then processing module 340 It is assured that out that N600 ground connection occurs for the N grounding that N number of second monitoring device 200 is correspondingly connected with, and can also be really It is normal to make the M-N branch that M-N the second monitoring devices 200 are correspondingly connected with.
Know that N600 ground connection occurs for the N grounding for the ease of operation maintenance personnel, processing module 340 can generate closure Trigger signal (being, for example, high level signal), and the closure trigger signal is sent to relay module 390.Simultaneously, it handles Module 340 calls the current time that timing module 330 obtains based on pre-set control programs, and is somebody's turn to do with determining based on the current time N grounding occurs that N600 is grounded as a result, generating the N point ground connection informations of corresponding N600 ground connection.It is understood that the N The concrete condition of the current time that N600 ground connection occurs and N points ground connection is contained in point ground connection information (for example, in N branch The number of every branch, the current value of every branch in N branch).N point ground connection informations based on generation, processing module 340 can It is stored so that N point ground connection informations are sent to memory module 350, and N point ground connection informations can be sent to display module 302 It has been shown that, and N point ground connection informations are also sent into communication module 360.
In this present embodiment, processing module 340 can also send out the information of M branch (either normal or ground connection) It is raw to display module 302, for example, by M branch every branch it is the currently monitored to current value occur in real time to aobvious Show module 302.
Memory module 350 can be the storage chip of routine on the market, and memory module 350 connects external power supply and obtains Power supply.Memory module 350 can store the N point ground connection informations that processing module 340 is sent every time as historical record, with Continuing after an action of the bowels can inquire.For example, can subsequently inquire m nearest N point ground connection information, m can be the integer not less than 20.
Communication module 360 can be the communication chip of RS485 or RS232 conventional on the market, and communication module 360 connects External power supply is powered.Communication module 360 then connects the N points in the N point ground connection informations for obtaining the transmission of processing module 340 The external host computer that ground information is transmitted to the communication mode of RS485 or RS232.
Fig. 3 and Fig. 5 are please referred to, police instruction module 370 can be the indicator light of conventional model on the market, police instruction Module 370 can be connect with relay module 390.Alarm output module 380 can be for conventional model on the market and defeated for alerting The hard contact circuit gone out, police instruction module 370 can also be connect with relay module 390.
Relay module 390 can be the many-contact relay of conventional model on the market.The first circuit of 390 inside of relay module 391 and the power supply of outside that is all connected with of second servo loop 392 and the first circuit 391 and second servo loop 392 powered.Wherein, So that the original state in the first circuit 391 is off state, second servo loop with the first normal opened contact 393 on first circuit 391 With the second normal opened contact 394 so that the original state of second servo loop 392 is off state on 392.In addition, police instruction module 370 be to be serially connected in the first circuit 391, and alarm output module 380 is then and is connected on second servo loop 392.
Relay module 390 is closed the field drives relay module 390 that trigger signal generates when obtaining closure trigger signal First normal opened contact 393 is closed by interior first switch 395, and second switch 396 is driven to be closed the second normal opened contact 394.Therefore 390 first circuit 391 of relay module and second servo loop 392 are then changed by off state in closed state.
Based on the closed state in the first circuit 391, police instruction module 370 is obtained with the electricity in the first circuit 391 Can and shine, to be grounded by shining to indicate that N600 occurs for N branch.
Based on the closed state of second servo loop 392, alarm output module 380 can be based on obtaining from second servo loop 392 Electric energy and generate warning trigger signal and be sent to external host computer.
Also as shown in Figure 3 and Figure 5, reseting module 301 can be in series by reset key and relay, wherein multiple The normally-closed contact of relay of position module 301 is located in the first circuit 391 in relay module 390, and reseting module 301 with outside The power supply connection in portion is powered.In this present embodiment, reseting module 301 respond detect reset input by user operation and Generate reset trigger signal, i.e. user presses reset key and makes circuit closed, makes on voltage-drop loading to relay in circuit The switch of the normally-closed contact and relay that obtain relay disconnects so that the first circuit 391 is in open circuit, and open circuit allows for relay mould First switch 395 in block 390 disconnects the first normal opened contact 393, and linkage second switch 396 is by the second normal opened contact 394 Also it disconnects so that the second servo loop 392 of the relay module 390 is also adjusted under the action of reset trigger signal by closed state It is off.
As shown in Fig. 3, Fig. 6 and Fig. 7, display module 302 can be the liquid crystal display of conventional type number.Specifically, display When obtaining N point ground connection informations, display module 302 can then show the N point ground connection informations module 302.Also, display module 302 can also show the present current value of every branch in M branch, for example, the control based on user and by display interface Display content the present current value of every branch is switched to by N point ground connection informations.
Also as shown in Figure 3 and Figure 5, in addition, in the present embodiment, external host computer may include:Public measure and control device, friendship It changes planes, background monitoring equipment, communication device and distal end controlling equipment.
Wherein, public measure and control device be triggering type equipment, public measure and control device respectively with the first circuit of relay module 390 391 connect with interchanger.In the first circuit, 391 off state changes in closed state, and public measure and control device can be based on Electric signal in first circuit 391 and be triggered, to generate the multipoint earthing trigger signal of high level to interchanger.
Interchanger is to go out conventional model on the market, interchanger respectively with communication module 360, background monitoring equipment and communicate dress Set connection.Interchanger can not only obtain multipoint earthing trigger signal, additionally it is possible to obtain the N points ground connection of the transmission of communication module 360 Information, old friend, which changes planes, can be respectively sent to multipoint earthing trigger signal background monitoring equipment and communication device, and by N points Ground connection information is also respectively sent to background monitoring equipment and communication device.
Background monitoring equipment can be engineer's computer in Central Control Room, and background monitoring equipment is based on obtaining multiple spot It is grounded trigger signal and judges multipoint earthing occur, and the concrete condition of multipoint earthing is determined further according to N point ground connection informations, and Also N point ground connection informations are shown, so that the operation maintenance personnel in Central Control Room can clearly be known.
Communication device can be that common are line or wireless communication device on the market.Communication device is based on setting with distal end scheduling Standby communication connection, then communication device multipoint earthing trigger signal and communication device can be forwarded to distal end controlling equipment again.
Distal end controlling equipment can be main website host computer in remote scheduling center, distal end controlling equipment also base Judge multipoint earthing occur in acquisition multipoint earthing trigger signal, and multipoint earthing is determined further according to N point ground connection informations Concrete condition, and also show N point ground connection informations, so that the operation maintenance personnel in remote scheduling center can be obtained clearly Know.
Second embodiment
Referring to Fig. 8, the embodiment of the present application provides a kind of substation PT N600 ground connection on-line monitoring localization method, application In above-mentioned substation PT N600 ground connection on-line monitoring positioning devices 10.Substation PT N600 ground connection on-line monitoring localization methods Including:Step S100, step S200 and step S300.
Step S100:The first signal monitored on earth point is obtained, and obtains N items branch road in M branch and monitors The N number of second signal arrived, wherein each branch is connect with the earth point in the M branch, and M is whole not less than 1 Number, N are the positive integer no more than M.
Step S200:According to first signal, and according to N number of second signal, determine that the N branch occurs N600 is grounded.
Step S300:It generates the N point ground connection informations of N600 ground connection and is sent to external host computer.
Referring to Fig. 9, in the step S200 of substation PT N600 ground connection on-line monitoring localization methods, step S200 tools Body includes:Step S210 and step S220.
Step S210:According to first signal generation at least two points ground fault is determined more than threshold value;
Step S220:It is all higher than the threshold value according to each second signal in N number of second signal, determines to occur extremely Few two points ground fault is that N600 ground connection occurs for the corresponding N branch of N number of second signal.
It should be noted that due to it is apparent to those skilled in the art that, the convenience for description and letter Clean, the specific implementation procedure of the method for foregoing description can refer to corresponding in aforementioned system, device and unit embodiment Journey, details are not described herein.
It should be understood by those skilled in the art that, the embodiment of the present application can be provided as method, system or computer program production Product.Therefore, in terms of the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and hardware Embodiment form.Moreover, it wherein includes computer available programs generation that the embodiment of the present application, which can be used in one or more, The meter implemented in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code The form of calculation machine program product.
In conclusion the embodiment of the present application provides a kind of substation PT N600 ground connection on-line monitoring positioning device and side Method, substation PT N600 ground connection on-line monitoring positioning devices include:First monitoring device, the first monitoring device is used for and substation The one point earth point of the secondary N600 of voltage transformer pt connects.M the second monitoring devices, each the in M the second monitoring devices Two monitoring devices with each branch for connecting correspondingly, wherein each branch is connect with earth point, and M is not less than 1 Integer.Processing unit, processing unit are connect with the first monitoring device and M the second monitoring devices respectively, and processing unit is used for The first signal monitored according to the first monitoring device, and monitored according to N number of second monitoring device in M the second monitoring devices To N number of second signal, determines that N600 ground connection occurs for the N branch that N number of second monitoring device is correspondingly connected with, generate N600 ground connection N point ground connection informations are simultaneously sent to external host computer, wherein N is the positive integer no more than M.
When there is at least two points ground fault of grounding in addition to earth point, can be monitored by the monitoring of the first monitoring device There is the first signal to earth point, and N number of second letter that N branch occurs can be monitored by N number of second monitoring device Number.Therefore processing unit is based on the first signal and N number of second signal and can in real time determine in addition to earth point, N branch hair N600 ground connection is given birth to.Processing unit generates the N point ground connection informations for N600 ground connection and is sent to external host computer so that fortune Dimension personnel, which are based on host computer, can understand, accurately and quickly know specific fault point, greatly improve troubleshooting efficiency, reduce The consuming of manpower and energy, and also reduce the O&M cost of equipment.
The preferred embodiment that these are only the application, is not intended to limit this application, for those skilled in the art For member, the application can have various modifications and variations.Any modification made by within the spirit and principles of this application, Equivalent replacement, improvement etc., should be included within the protection domain of the application.It should be noted that:Similar label and letter are under Similar terms are indicated in the attached drawing in face, therefore, once being defined in a certain Xiang Yi attached drawing, are not then needed in subsequent attached drawing It is further defined and explained.
More than, the only specific implementation mode of the application, but the protection domain of the application is not limited thereto, and it is any to be familiar with Those skilled in the art can easily think of the change or the replacement in the technical scope that the application discloses, and should all cover Within the protection domain of the application.Therefore, the protection domain of the application should be subject to the protection scope in claims.

Claims (10)

1. a kind of substation PT N600 ground connection on-line monitoring positioning device, which is characterized in that including:
First monitoring device, first monitoring device is for the one point earth point with bis- N600 of transformer substation voltage mutual inductor PT Connection;
M the second monitoring devices, in the M the second monitoring devices each second monitoring device for correspondingly with each Branch connects, wherein each branch is connect with the earth point, and M is the integer not less than 1;
Processing unit, the processing unit is connect with first monitoring device and the M the second monitoring devices respectively, described The first signal that processing unit is used to be monitored according to first monitoring device, and according to the M the second monitoring devices In N number of second monitoring device monitor N number of second signal, determine the N branch hair that N number of second monitoring device is correspondingly connected with Raw N600 ground connection generates the N point ground connection informations of N600 ground connection and is sent to external host computer, wherein N is just whole no more than M Number.
2. substation PT N600 ground connection on-line monitoring positioning device according to claim 1, which is characterized in that the processing Device includes:
Sampling module, the sampling module is connect with first monitoring device and the M the second monitoring devices respectively, described Sampling module is used to the first signal that first monitoring device monitors being amplified and conversion process, and treated for acquisition First signal, and N number of second monitoring device in the M the second monitoring devices is monitored that N number of second signal is amplified And conversion process, obtain treated N number of second signal;
Processing module, the processing module are connect with the sampling module, and the processing module is for treated according to First signal and described treated that N number of second signal determines that N branch that N number of second monitoring device is correspondingly connected with occurs N600 is grounded, and generates the N point ground connection informations of N600 ground connection;
Communication module, the communication module are connect with the processing module, and the communication module is used for the N points ground connection information It is transmitted to external host computer.
3. substation PT N600 ground connection on-line monitoring positioning device according to claim 2, which is characterized in that the sampling Module includes:
Sampling unit, the sampling unit connect with first monitoring device and the M the second monitoring devices, are used for respectively The first signal that first monitoring device monitors is obtained, and obtains N number of second monitoring in M second monitoring device Device monitoring is to N number of second signal;
Amplifying unit obtains amplified first signal, and described N number of second is believed for amplifying first signal Number amplification, obtains amplified N number of second signal;
Converting unit, for will the amplified first signal analog-to-digital conversion process, acquisition treated the first signal, and By amplified N number of second signal analog-to-digital conversion process, N number of second signal that obtains that treated.
4. substation PT N600 ground connection on-line monitoring positioning device according to claim 3, which is characterized in that described first Monitoring device and the M the second monitoring devices are current transformer.
5. substation PT N600 ground connection on-line monitoring positioning device according to claim 4, which is characterized in that the processing Device further includes:
Relay module, the relay module are connect with the processing module, and the relay module is used for according to the processing module Drive the first circuit and second servo loop in itself equal based on the closure trigger signal for determining N branch generation N600 ground connection and generating In closed state;
Police instruction module, the police instruction module are connect with first circuit, and the police instruction module is used in institute It when stating the first circuit closed, obtains the electric energy in first circuit and shines, to indicate that N branch occurs by shining N600 is grounded.
6. substation PT N600 ground connection on-line monitoring positioning device according to claim 5, which is characterized in that the processing Device further includes:
Alarm output module, the alarm output module are connect with the second servo loop, and the alarm output module is used in institute State second servo loop in the closure state, it is concurrent to generate warning trigger signal based on the electric energy obtained from the second servo loop It send to external host computer.
7. substation PT N600 ground connection on-line monitoring positioning device according to claim 6, which is characterized in that the processing Device further includes:
Reseting module, the reseting module are connect with the relay module, and the reseting module is for responding the user detected The reset operation of input generates reset trigger signal, so that first circuit of the relay module is believed in the reset trigger Number driving under be adjusted to be off the driving with the second servo loop in the reset trigger signal by closed state Under be adjusted to be off by closed state.
8. substation PT N600 ground connection on-line monitoring positioning device according to claim 7, which is characterized in that the processing Device further includes:
Display module, the display module are connect with the processing module, and the display module is for giving birth to the processing module At the N points ground connection information show.
9. a kind of substation PT N600 ground connection on-line monitoring localization method, which is characterized in that be applied to as claim 1-8 is any Substation PT N600 ground connection on-line monitoring positioning devices described in claim, the method includes:
The first signal monitored on earth point is obtained, and obtains N number of second letter that N items branch road in M branch monitors Number, wherein each branch is connect with the earth point in the M branch, and M is the integer not less than 1, and N is no more than M's Positive integer;
According to first signal, and according to N number of second signal, determine that N600 ground connection occurs for the N branch;
It generates the N point ground connection informations of N600 ground connection and is sent to external host computer.
10. substation PT N600 ground connection on-line monitoring localization method according to claim 9, which is characterized in that described According to first signal, and according to N number of second signal, determine that N600 ground connection occurs for the N branch, including:
According to first signal generation at least two points ground fault is determined more than threshold value;
It is all higher than the threshold value according to each second signal in N number of second signal, determines that at least two points ground fault, which occurs, is N600 ground connection occurs for the corresponding N branch of N number of second signal.
CN201810660036.0A 2018-06-22 2018-06-22 Substation PT N600 ground connection on-line monitoring positioning device and method Pending CN108614195A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292526A (en) * 2006-04-24 2007-11-08 Tohoku Electric Power Co Inc Ground fault locator for service wire
CN204154848U (en) * 2014-10-28 2015-02-11 广州市仟顺电子设备有限公司 A kind of Secondary Circuit of Potential Transformer multipoint earth faults on-Line Monitor Device
CN204228885U (en) * 2014-09-25 2015-03-25 中国南方电网有限责任公司超高压输电公司南宁局 The multipoint earth faults on-line computing model of electric system common return
CN205015427U (en) * 2015-09-07 2016-02-03 江苏省电力公司泰州供电公司 Neutral point multipoint earthing detection device based on high accuracy testing electric current
CN205404719U (en) * 2016-03-09 2016-07-27 国家电网公司 Mutual -inductor common return multipoint earthing detector
CN208239553U (en) * 2018-06-22 2018-12-14 广东电网有限责任公司 Substation PT N600 ground connection on-line monitoring positioning device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292526A (en) * 2006-04-24 2007-11-08 Tohoku Electric Power Co Inc Ground fault locator for service wire
CN204228885U (en) * 2014-09-25 2015-03-25 中国南方电网有限责任公司超高压输电公司南宁局 The multipoint earth faults on-line computing model of electric system common return
CN204154848U (en) * 2014-10-28 2015-02-11 广州市仟顺电子设备有限公司 A kind of Secondary Circuit of Potential Transformer multipoint earth faults on-Line Monitor Device
CN205015427U (en) * 2015-09-07 2016-02-03 江苏省电力公司泰州供电公司 Neutral point multipoint earthing detection device based on high accuracy testing electric current
CN205404719U (en) * 2016-03-09 2016-07-27 国家电网公司 Mutual -inductor common return multipoint earthing detector
CN208239553U (en) * 2018-06-22 2018-12-14 广东电网有限责任公司 Substation PT N600 ground connection on-line monitoring positioning device

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