CN104035003B - Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side - Google Patents
Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side Download PDFInfo
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- CN104035003B CN104035003B CN201410296912.8A CN201410296912A CN104035003B CN 104035003 B CN104035003 B CN 104035003B CN 201410296912 A CN201410296912 A CN 201410296912A CN 104035003 B CN104035003 B CN 104035003B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
The present invention relates to Relay Protection Technology in Power System field; particularly a kind of sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side; this method gathers the information of block switch and PT switching node signals in real time; by analyzing the logical relation between block switch and PT switching nodes, the PT signals of I sections and II sections are switched in real time.This method is conducive to improving route selection accuracy rate and reliability.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, particularly a kind of sectionalized single busbar connection PT low currents arranged side by side connect
Ground route selection logic decision method.
Background technology
Using the Main connection form of single mother partition more than China 110kV and following transformer station.Connection in the middle of two sections of buses is opened
Pass is the block switch of bus.Any circuit can only be connected on I sections or II sections of buses.After sectionalized single busbar connection, use important
Family can use different sections of power supplies.When one section of bus breaks down, section switch can be automatically by failure removal, it is ensured that normal
Section bus uninterrupted power supply.When bus PT is overhauled, the PT is out of service, and now block switch is in when closing position, can be with
On the PT input terminals into measurement, protection device in inspecting state, so may be used with the PT voltages automatic Synchronization of another section of bus
With the normal operation of the accuracy and protection device that ensure measurement.But there have a considerable amount of transformer stations to be fitted without PT to be arranged side by side
Device, or some equipment do not access PT small bus bar, cause in these cases the equipment can not obtain correct letter
Number.
Small current earthing wire-selecting equipment is the common equipment of 110kV and following transformer station, carries low current grounding
The function of detection, route selection and tripping operation or alarm.In the case of block switch closure and wherein one section PT maintenance, if can not be right
PT signals are effectively switched, and necessarily cause route selection functions of the equipments to be lost.Patent CN102495330A small current earthing wire-selectings are filled
The implementation method of adaptive coupled running mode is put, a kind of sentencing for coupled running mode of Small Electric Current Earthing And Routing Device is described
Determine method, but do not illustrate the switching of PT signals and its logic decision method.
The content of the invention
, should it is an object of the invention to provide a kind of sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side
Method is conducive to improving route selection accuracy rate and reliability.
The technical solution adopted by the present invention is：A kind of sectionalized single busbar connection PT small current earthing wire-selecting logic decision sides arranged side by side
The information of method, in real time collection block switch and PT switching node signals, by analyzing between block switch and PT switching nodes
Logical relation, is switched in real time to the PT signals of I sections and II sections.
Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side of the present invention, comprise the following steps：
Step 1, the nodal information of block switch, I sections of PT switches and II sections of PT switches is read；
Step 2, judge the state of block switch, if open mode, be directly entered route selection module；If closed form
State, goes to step 3；
Step 3, if I sections of PT switches are opened, the value of II sections of PT signals is assigned to I sections of PT switches by II sections of PT switch closures,
Into route selection module；If II sections of PT switches are opened, the value of I sections of PT signals is assigned to II sections of PT switches by I sections of PT switch closures,
Into route selection module；If I sections of PT switches and II sections of PT switches are opened or are closed at simultaneously, alarm.
The beneficial effects of the invention are as follows：By gathering on off state node signal, the judgement of logical relation is carried out, so that real
Existing PT signal soft handovers.This method is without manually change configuration, it is ensured that the accuracy and reliability of route selection.
Brief description of the drawings
Fig. 1 is the signal access schematic diagram under single mother partition system main electrical scheme in the embodiment of the present invention.
Fig. 2 is the implementation process figure of logic decision method in the embodiment of the present invention.
Embodiment
For clearer explaination advantages of the present invention, half-and-half invent with reference to the accompanying drawings and detailed description into traveling
The detailed description of one step.Many instantiations are listed in the following description to fully understand advantages of the present invention, still
The present invention can also be different from other modes described here to implement using other, therefore the present invention is not limited to be described below
Instantiation limitation.
The sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side that the present invention is provided, in real time collection segmentation is opened
The information with PT switching node signals is closed, by analyzing the logical relation between block switch and PT switching nodes, to I sections and II
The PT signals of section are switched in real time.
As shown in figure 1, the signal schematic representation accessed for line selection apparatus under single mother partition system main electrical scheme.I sections of buses and II
It is block switch L1 between section bus.The PT2 of the PT1 of I sections of buses switch K1, II section bus switch K2.
Block switch L1, PT1 switch K1 and PT2 switch K2 nodal information, access Small Electric Current Earthing And Routing Device
Digital quantity input module.
PT1 and PT2 voltage signal accesses the voltage signal acquisition module of Small Electric Current Earthing And Routing Device.
The zero-sequence current of each bar outlet accesses the zero sequence CT signal acquisition modules of Small Electric Current Earthing And Routing Device.
After signal access device, collection signal processing module handles the digital quantity and analog quantity of input in real time.
Logical algorithm module is according to block switch L1, PT1 switch K1 and PT2 switch K2 node real time information, reality
When soft handover is carried out to PT1 and PT2 voltage signal.As shown in Fig. 2 being the realization of logic decision method in the embodiment of the present invention
Flow chart, the logic decision method comprises the following steps：
Step 1, the nodal information of block switch, I sections of PT switches and II sections of PT switches is read；
Step 2, judge the state of block switch, if open mode, represent I sections and II sections of bus section operations, then
The PT signals of I sections and II sections are not switched over, be directly entered route selection module；If closure state, I sections and II sections mothers are represented
Line paired running, then go to step 3；
Step 3, the nodal information switched with II sections of PT is switched according to I sections of PT, judges what I sections of PT switches and II sections of PT were switched
Working condition, and in running order PT signals are assigned to other one section of PT signals；If under paired running, I sections and
II sections of PT switches are then alarmed simultaneously in closure or open mode.Specifically, if I sections of PT switches are opened, II sections of PT are opened
Close and close, the value of II sections of PT signals is assigned to I sections of PT switches, into route selection module；If II sections of PT switches are opened, I sections of PT are opened
Close and close, the value of I sections of PT signals is assigned to II sections of PT switches, into route selection module；If I sections of PT switches and II sections of PT switches are same
When open or be closed at, then alarm.
Above-mentioned logic decision method, is achieved that using switching node information, it is not necessary to complicated calculating, in that context it may be convenient to
PT signal soft handovers are realized in the program of line selection apparatus.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function is made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (1)
1. a kind of sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side, it is characterised in that collection segmentation in real time
Switch and PT switching node signals information, by analyzing the logical relation between block switch and PT switching nodes, to I section with
II sections of PT signals are switched in real time：Specifically include following steps：
Step 1, the nodal information of block switch, I sections of PT switches and II sections of PT switches is read；
Step 2, judge the state of block switch, if open mode, be directly entered route selection module；If closure state,
Go to step 3；
Step 3, if I sections of PT switches are opened, the value of II sections of PT signals is assigned to I sections of PT switches, entered by II sections of PT switch closures
Route selection module；If II sections of PT switches are opened, the value of I sections of PT signals is assigned to II sections of PT switches, entered by I sections of PT switch closures
Route selection module；If I sections of PT switches and II sections of PT switches are opened or are closed at simultaneously, alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296912.8A CN104035003B (en) | 2014-06-28 | 2014-06-28 | Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296912.8A CN104035003B (en) | 2014-06-28 | 2014-06-28 | Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side |
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| Publication Number | Publication Date |
|---|---|
| CN104035003A CN104035003A (en) | 2014-09-10 |
| CN104035003B true CN104035003B (en) | 2017-08-01 |
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| CN201410296912.8A Active CN104035003B (en) | 2014-06-28 | 2014-06-28 | Sectionalized single busbar connection PT small current earthing wire-selecting logic decision methods arranged side by side |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535894B (en) * | 2015-01-08 | 2017-07-07 | 国家电网公司 | Earth fault line selection method and device under the double-bus method of operation |
| CN107561408B (en) * | 2017-08-28 | 2019-12-06 | 济南大学 | Method for improving accuracy rate of small current ground fault line selection |
| CN108318787B (en) * | 2017-12-28 | 2020-04-28 | 国网智能科技股份有限公司 | Direct-current bus multi-section parallel operation switching method and system |
| CN109557390B (en) * | 2018-11-16 | 2021-02-09 | 陕西千山航空电子有限责任公司 | Self-detection circuit of discrete magnitude output interface |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495330A (en) * | 2011-11-21 | 2012-06-13 | 广西星宇智能电气有限公司 | Realization method of undercurrent grounding line selection apparatus adaptive coupler operation mode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078188A (en) * | 2000-08-23 | 2002-03-15 | Nissin Electric Co Ltd | Degraded distribution line insulator diagnostic device |
| JP3819884B2 (en) * | 2003-09-02 | 2006-09-13 | 中国電力株式会社 | Zero phase current transformer characteristic measurement device |
| CN200953470Y (en) * | 2006-10-10 | 2007-09-26 | 杜志庭 | Small current grounding wire selecting device for neutral point non-effective ground connection system |
| CN103760465B (en) * | 2014-01-24 | 2016-06-08 | 泉州维盾电气有限公司 | Single-phase grounded malfunction in grounded system of low current discriminating direction and processing method |
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- 2014-06-28 CN CN201410296912.8A patent/CN104035003B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495330A (en) * | 2011-11-21 | 2012-06-13 | 广西星宇智能电气有限公司 | Realization method of undercurrent grounding line selection apparatus adaptive coupler operation mode |
Non-Patent Citations (1)
| Title |
|---|
| PT并列与PT切换;csm19810421;《百度文库》;20110523;文章第1-3段，倒数第1-2段 * |
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