CN203759172U - Switch gap status discrimination device - Google Patents
Switch gap status discrimination device Download PDFInfo
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- CN203759172U CN203759172U CN201320851884.2U CN201320851884U CN203759172U CN 203759172 U CN203759172 U CN 203759172U CN 201320851884 U CN201320851884 U CN 201320851884U CN 203759172 U CN203759172 U CN 203759172U
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- switch
- disconnecting link
- switch gap
- auxiliary contact
- contact
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Abstract
The utility model discloses a switch gap status discrimination device. Two sides of a switch are respectively electrically connected with a first disconnecting link and a second disconnecting link. The switch gap status discrimination device comprises a discrimination mechanism of the switch gap being on an isolated status and a discrimination mechanism of the switch gap being on a connected status. The discrimination mechanism of the switch gap being on an isolated status comprises a first switch gap measuring and control device, and an OR gate. The first switch gap measuring and control device is used to monitor a first disconnecting link position auxiliary contact, a second disconnecting link position auxiliary contact, and a switch position auxiliary contact. The OR gate is used to determine the switch gap is on the isolated status when output of the output end of the OR gate is 1. Three input ends of the OR gate are respectively connected with output of the first disconnecting link position auxiliary contact, the second disconnecting link position auxiliary contact, and the switch position auxiliary contact which are monitored by the first switch gap measuring and control device. The device can prevent occurrence of maloperation which may be caused by connecting operation of just a series, thererby ensuring reliability of power supply of a DC system.
Description
Technical field
The utility model relates to technical field of power systems, is specifically related to a kind of switch gap status discriminator.
Background technology
Certain current conversion station 500kV alternating-current field adopts 2/3 mode of connection, and structure diagram is (the elliptically equipment such as cutter, CT, PT) as shown in Figure 1:
The utmost point 1 is high-end, the utmost point 1 low side, the utmost point 2 are high-end, the utmost point 2 low sides totally four valve groups DC side power is delivered to electrical network by alternating current circuit; And alternating current filter one is the harmonic wave producing in the valve group course of work for eliminating, but can provide idle for the consumption in four valve group courses of work, simultaneously unnecessary idle can be for the voltage of compensation AC system; Under normal circumstances, all switches of alternating-current field, disconnecting link are all in co-bit, and what alternating current filter provided is idle except just meeting the consumption of four valve groups, in addition the unnecessary idle ac bus voltage (general 525kV～535kV) in specialized range that also just maintains.
In actual moving process, may occur 500kV#1M with #2M only for example, by a string operating mode being connected:
(1) first string: 5011,5012,5013 intervals are in connection status;
(2) second strings: 5021 in connection status, and 5023 in isolation;
(3) the 3rd strings: 5031 in connection status, and 5033 in isolation;
(4) the 4th strings: 5041 in connection status, and 5042,5043 in isolation;
(5) the 5th strings: 5051,5053 in connection status, and 5052 in isolation;
(6) the 6th strings: 5061,5062 in connection status, and 5063 in isolation.
Meet operating mode (1)～(6) is equivalent to #1M and #2M and only by the first series winding, connects simultaneously, now, once cause for a certain reason 5011 intervals to become isolation from connection status, #1M and #2M will isolate operation completely, and the utmost point 2 low sides, the utmost point 1 are high-end, the low end valve group of the utmost point 1 still has electrical connection (all in #1M operation) with alternating current filter, still can normally move.Although and the high end valve group of the utmost point 2 can also by 5013 and 5053 intervals to alternating current circuit 1 transmission power, but lose electrical connection completely with all alternating current filters, now, all alternating current filters all cannot provide idle to the high end valve group of the utmost point 2 and #2M, to cause the high end valve group of the utmost point 2 lack idle and cannot normally move on the one hand, thereby a large amount of harmonic waves that produce in the high end valve group of the one side utmost point 2 course of work in addition also cannot be eliminated the operation that threatens primary equipment, simultaneously also can be because idle deficiency causes #2M lower voltage, the now high end valve group continuation of the utmost point 2 operation is unfavorable factor for system.Therefore, current conversion station has designed " bus splitting " this defencive function, and, when there is above operating condition, Exchange Station control system can be judged ac bus split operation, and starts extremely 2 high end valve groups of emergency outage.
The logic of judging bus splitting realizes in Exchange Station control system, wherein most critical point is " #1, #2M are without connecting ", and to meet #1, #2M without connecting this condition, and needing to have an interval at least in isolation in alternating-current field every a string---in this interval switch and both sides disconnecting link three, any one is not in co-bit.In Exchange Station control system logic, can see that this concrete logic (take 5011 switches as example) as shown in Figure 2.
Whether note: I1, I2, I3 judge in closing position 50111 disconnecting links, 5011 switches, 50112 disconnecting links respectively; Auxiliary contact comprises closing position auxiliary contact and open position auxiliary contact, and switch or disconnecting link are when closing position, and closing position auxiliary contact is closed, and switch or disconnecting link are when open position, and open position auxiliary contact is closed; KT relay is used for monitoring disconnecting link motor, during motor overheating, and the KT actuating of relay, junction closure; SD is that disconnecting link motor power sky is opened auxiliary contact, SD junction closure during power fail.
In Exchange Station control logic, the condition of setting up (being input as 1) for I1, I3 is:
A, disconnecting link closing position auxiliary contact closure, and open position auxiliary contact disconnects;
B, KT actuating of relay contact disconnect;
C, SD contact disconnect.
I2(is input as 1) establishment condition be: switch closing position auxiliary contact is closed, and open position auxiliary contact disconnects.
And if only if I1, I2, I3 are at 1 o'clock, output Q=I1AND I2AND I3=1, i.e. and Exchange Station control judges that 5011 switch gaps are in connection status, then after logic inverter negate, is 5011 switch gaps in isolation.
In current conversion station actual moving process, fieldbus between the location aided rebroadcast contact of switch and disconnecting link, KT relay, SD contact and measure and control device and Exchange Station control etc. all occurs the possibility of fault, and cause switch and disconnecting link in fact in " definite co-bit " and I1, I2, I3 mode bit become 0, therefore Q also becomes 0, finally cause this interval of control erroneous judgement, Exchange Station in isolation, meet the condition of bus splitting, finally cause the tripping operation of respective valve group.
Known by above analysis, even if switch and disconnecting link are in fact in " definite co-bit ", and because location aided rebroadcast contact, KT relay, SD contact and the measure and control device of switch and disconnecting link and the fieldbus between the control of Exchange Station etc. break down, all likely cause Exchange Station control erroneous judgement switch gap in isolation, finally cause bus splitting logic to be set up, the consequence of respective valve group emergency outage.
Utility model content
For above deficiency, the purpose of this utility model is to provide a kind of switch gap status discriminator, it can thoroughly, effectively solve switch gap reality in connection status, and Exchange Station control system thinks that it is in the logical design defect of isolation by mistake by a kind of new logic.
For realizing above object, the technical scheme that the utility model has been taked is:
A kind of switch gap status discriminator, the both sides of this switch are electrically connected with respectively the first disconnecting link and the second disconnecting link, this switch gap status discriminator comprise switch gap in isolation mechanism for identifying and switch gap at connection status mechanism for identifying, described switch gap comprises at isolation mechanism for identifying:
The first switch gap measurement and control device, for monitoring the first disconnecting link location aided rebroadcast contact and the second disconnecting link location aided rebroadcast contact and this position of the switch auxiliary contact;
Or door, for being output as at 1 o'clock at output terminal described or door, judge that switch gap is in isolation, it comprises three input ends, and these three input ends are connected with the output of the second disconnecting link location aided rebroadcast contact and this position of the switch auxiliary contact with the first disconnecting link location aided rebroadcast contact of the first switch gap measurement and control device monitoring respectively.
Described switch gap comprises at connection status mechanism for identifying:
Second switch interval measure and control device, for primary importance, the second place and position of the switch auxiliary contact are monitored, described primary importance comprises the first disconnecting link location aided rebroadcast contact, for monitoring that action connection point and the first disconnecting link motor power sky of a KT relay of the first disconnecting link motor open auxiliary contact; The described second place comprises the second disconnecting link location aided rebroadcast contact, for monitoring that action connection point and the second disconnecting link motor power sky of the 2nd KT relay of the second disconnecting link motor open auxiliary contact;
With door, for being output as at 1 o'clock at output terminal described and door, judge that switch gap is in connection status, it comprises three input ends, and the output of primary importance, the second place and position of the switch auxiliary contact that these three input ends are monitored with second switch interval measure and control device is respectively connected.
Wherein, the first switch gap measurement and control device and second switch interval measure and control device can adopt same switch gap measurement and control device to monitor.
Compared with prior art, its beneficial effect is the utility model: the generation that causes the situation that likely occurs malfunction once the utility model can be avoided occurring only having a string contact operation, the power supply reliability of assurance straight-flow system.
Accompanying drawing explanation
Fig. 1 is that existing current conversion station 500kV alternating-current field adopts 2/3 mode of connection sketch;
Fig. 2 is existing switch gap status discriminator;
Fig. 3 is that the utility model switch gap is at the discriminating gear of isolation.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment
The utility model is controlled to realize by revising Exchange Station, and the decision logic for switch gap in connection status can not changed, and still continues to use the scheme in background technology; But the judgement for the switch gap that forms the most important condition of bus splitting in isolation, modifies according to the utility model.
Take switch 5011 as example, and switch 5011 intervals refer to switch 5011 and both sides disconnecting link 50111,50112 all in co-bit in connection status; Switch 5011 intervals refer to switch 5011 and both sides disconnecting link 50111,50112 in isolation, and among three, any one is not in co-bit.Therefore for switch 5011 intervals, at the method for discrimination of isolation, be:
Disconnecting link 50111 location aided rebroadcast contacts and disconnecting link 50112 location aided rebroadcast contacts and this switch 5011 location aided rebroadcast contacts are monitored;
While having one to be output as 1 in disconnecting link 50111 location aided rebroadcast contacts and disconnecting link 50112 location aided rebroadcast contacts and this switch 5011 location aided rebroadcast contacts, this switch 5011 is spaced apart isolation.
Wherein disconnecting link 50111 location aided rebroadcast contacts are output as 1 method of discrimination and are: the open position auxiliary contact of disconnecting link 50111 is closed, and the closing position auxiliary contact of disconnecting link 50111 disconnects; Disconnecting link 50112 location aided rebroadcast contacts are output as 1 method of discrimination: the open position auxiliary contact of disconnecting link 50112 is closed, and the closing position auxiliary contact of disconnecting link 50112 disconnects; Switch 5011 location aided rebroadcast contacts are output as 1 method of discrimination: the closing position auxiliary contact of switch 5011 is closed, and the open position auxiliary contact of switch 5011 disconnects.
Please refer to shown in Fig. 3, according to above-mentioned principle, differentiate switch 5011 intervals and comprise at the device of isolation:
Switch 5011 interval measure and control devices, for monitoring disconnecting link 50111 location aided rebroadcast contacts and disconnecting link 50112 location aided rebroadcast contacts and this switch 5011 location aided rebroadcast contacts;
Or door, its three input ends (I4, I5, I6) are connected with the output of disconnecting link 50112 disconnecting link location aided rebroadcast contacts and this switch 5011 location aided rebroadcast contacts with the disconnecting link 50111 location aided rebroadcast contacts of switch 5011 interval measure and control device monitorings respectively, its output terminal P is connected with identifying unit, if this or door are output as 1, identifying unit judges that switch gap is as isolation.
Still take that to meet operating condition (1)～(6) in 1 be example, be that #1M and #2M only connect by the first series winding, 5011 switches, 50111 disconnecting links, 50112 disconnecting links are in " definite co-bit ", closing position auxiliary contact is closed, open position auxiliary contact disconnects, KT, SD contact all disconnect, and field bus communication is normal.Now, abnormal conditions may occur damages or KT or the misoperation of SD contact or field bus communication fault as: closing position contact.As according to original design proposal, above-mentioned three kinds of situations all can cause I1, I2, I3 to be input as 0, Q being output as 0, thereby Exchange Station control judges that 5011 intervals, in isolation, meet bus splitting, finally causes the high end valve group tripping operation of the utmost point 2.And according to the designed scheme of the utility model, as long as switch and both sides disconnecting link be when closing position, I4, I5, I6, P are always 0, even if there is the control of above-mentioned three kinds of abnormal conditions Exchange Stations, can judge 5011 by accident yet and be spaced apart isolation.And if only if 5011 switches, 50111 disconnecting links, 50112 disconnecting link threes are arbitrary, and in " minute position of determining ", open position auxiliary contact is closed, when closing position auxiliary contact disconnects, just can meet 5011 requirements that are spaced apart isolation.
At whole alternating-current field, have many strings or all strings all to get in touch with under the operating mode of operation, every a string each interval all occurs that the possibility of above-mentioned abnormal conditions is very small, therefore according to original design proposal, causes the probability of valve group mistrip lower.Once there is only having the situation of a string contact operation, by above comparative analysis, knownly according to original design proposal, just will probably occur malfunction, and the related scheme of the utility model just can be avoided the generation of this situation very reliably, guarantee the power supply reliability of straight-flow system.
Above-listed detailed description is for the illustrating of the utility model possible embodiments, and this embodiment is not in order to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, all should be contained in the scope of the claims of this case.
Claims (2)
1. a switch gap status discriminator, the both sides of this switch are electrically connected with respectively the first disconnecting link and the second disconnecting link, this switch gap status discriminator comprise switch gap in isolation mechanism for identifying and switch gap at connection status mechanism for identifying, it is characterized in that, described switch gap comprises at isolation mechanism for identifying:
The first switch gap measurement and control device, for monitoring the first disconnecting link location aided rebroadcast contact and the second disconnecting link location aided rebroadcast contact and this position of the switch auxiliary contact;
Or door, for being output as at 1 o'clock at output terminal described or door, judge that switch gap is in isolation, it comprises three input ends, and these three input ends are connected with the output of the second disconnecting link location aided rebroadcast contact and this position of the switch auxiliary contact with the first disconnecting link location aided rebroadcast contact of the first switch gap measurement and control device monitoring respectively.
2. switch gap status discriminator according to claim 1, is characterized in that, described switch gap comprises at connection status mechanism for identifying:
Second switch interval measure and control device, for primary importance, the second place and position of the switch auxiliary contact are monitored, described primary importance comprises the first disconnecting link location aided rebroadcast contact, for monitoring that action connection point and the first disconnecting link motor power sky of a KT relay of the first disconnecting link motor open auxiliary contact; The described second place comprises the second disconnecting link location aided rebroadcast contact, for monitoring that action connection point and the second disconnecting link motor power sky of the 2nd KT relay of the second disconnecting link motor open auxiliary contact;
With door, for being output as at 1 o'clock at output terminal described and door, judge that switch gap is in connection status, it comprises three input ends, and the output of primary importance, the second place and position of the switch auxiliary contact that these three input ends are monitored with second switch interval measure and control device is respectively connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851884.2U CN203759172U (en) | 2013-12-20 | 2013-12-20 | Switch gap status discrimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851884.2U CN203759172U (en) | 2013-12-20 | 2013-12-20 | Switch gap status discrimination device |
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| Publication Number | Publication Date |
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| CN203759172U true CN203759172U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320851884.2U Expired - Fee Related CN203759172U (en) | 2013-12-20 | 2013-12-20 | Switch gap status discrimination device |
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| CN (1) | CN203759172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791341A (en) * | 2021-09-14 | 2021-12-14 | 云南电网有限责任公司电力科学研究院 | Component switching-on/off state judging system based on electric quantity and switch information |
-
2013
- 2013-12-20 CN CN201320851884.2U patent/CN203759172U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791341A (en) * | 2021-09-14 | 2021-12-14 | 云南电网有限责任公司电力科学研究院 | Component switching-on/off state judging system based on electric quantity and switch information |
| CN113791341B (en) * | 2021-09-14 | 2024-04-09 | 云南电网有限责任公司电力科学研究院 | Component switching state discrimination system based on electric quantity and switching information |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |