CN207689955U - A kind of DC control protective device for realizing switching value circuit on-bne repair - Google Patents
A kind of DC control protective device for realizing switching value circuit on-bne repair Download PDFInfo
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Abstract
The utility model discloses a kind of DC control protective devices for realizing switching value circuit on-bne repair, including switch, the primary detection module of disconnecting link equipment open position contact, switch, disconnecting link equipment closing position contact, equipment operation, equipment running status input control module and DC control protective device.Primary detection module, which is run, by equipment may determine that switch, whether disconnecting link equipment open position and closing position are in normal operating condition, by on the basis of equipment runs primary detection module, increase equipment running status input control module, when circuit is without maintenance, DC control protective device uses dc switch class equipment divide-shut brake location information, when relevant device status information input circuit exception or when needing repair and maintenance, pass through the position handover operation to corresponding control module, and then the correct location information of equipment is sent into DC control protective device, realize the on-bne repair in facility switching amount circuit.
Description
Technical Field
The utility model relates to an electrical engineering direct current control protection field, concretely relates to realize on-line maintenance's of switching value return circuit direct current control protection device.
Background
The high-voltage and extra-high-voltage direct-current transmission is a transmission mode that three-phase alternating current is rectified into direct current through a converter station and then is transmitted to another converter station through a direct-current transmission line to be inverted into three-phase alternating current. Compared with the alternating current transmission project, the direct current transmission has the advantages of low line cost, low running electric energy loss, obvious transmission energy-saving effect, high adjusting speed, high running reliability and the like. Because the direct-current transmission system has large transmission capacity, the abnormal direct-current locking can cause adverse effect on the safe and stable operation of a power grid at a transmitting end and a receiving end, so that the direct-current operation reliability is improved to the maximum extent, the hidden danger of causing the locking of the direct-current transmission system is eliminated, the power supply reliability can be improved, and the stability of the power grid can be improved.
The safe and stable operation of the direct current control protection system is a necessary condition for ensuring the normal operation of a direct current transmission system, and is different from the alternating current control protection system in that a plurality of logic operations of the direct current control protection system need to adopt the opening and closing position information of a direct current field switch and a disconnecting link, if the state information of the switch and the disconnecting link is input into a loop, the direct current control protection device is directly operated by mistake or refused to operate, and then the direct current system is abnormally locked, so that the reliability of a switching value loop of switching equipment is improved, and the fault of the switching value loop is efficiently and safely eliminated. At the present stage, in engineering, two schemes are generally adopted to carry out maintenance on a direct current switching value loop, one scheme is that after a direct current control protection device related to a fault loop is withdrawn and the fault loop is isolated, an abnormal loop is checked and processed; the other scheme is that after the fault loop is isolated and the number is set in the direct current control protection program related to the fault loop, the fault is checked and processed. The two existing processing modes have some problems, and for the first scheme, at least one set of direct current control protection system needs to be withdrawn in an actual situation, so that the reliability of the direct current control protection device is reduced, and the risk of abnormal direct current locking caused by loss of the direct current control protection system is greatly increased; for the second scheme, because software setting work needs to be carried out, the risk caused by misoperation and operation leakage of personnel is increased, and the fault handling efficiency is greatly reduced. In addition, the two current fault processing modes can not completely solve the problems of misoperation and refusal of the direct current control protection system caused by misoperation and the like during personnel fault processing and overhauling and maintenance, and can not really realize online overhauling and maintenance of the switching value loop.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned prior art not enough, provide a realize the DC control protection device that switching value return circuit overhauld on line to solve the problem that the switching value input circuit of primary equipment leads to the DC control protection device reliability to reduce unusually, avoid switching value input circuit to overhaul the hidden danger that the maintenance results in DC control protection device malfunction, refuses to move unusually.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a direct current control protection device for realizing on-line maintenance of a switching value loop comprises a switch, a disconnecting position contact of a disconnecting link device, a switch, a disconnecting link device switching-on position contact, a device operation primary detection module, a device operation state input control module and a direct current control protection device; wherein,
the device operation primary detection module comprises a first NOT gate logic unit, a first AND gate logic unit, a second NOT gate logic unit, a second AND gate logic unit, an XOR gate logic unit, a switch and a switch device position information normal indicator; the signal output ends of the switch and the disconnecting link device disconnecting link position contact are respectively connected with the signal input ends of the first AND gate logic unit and the second NOT gate logic unit; the signal output ends of the switch-on position contact of the switch and the disconnecting link device are respectively connected with the signal input ends of the first NOT gate logic unit and the second AND gate logic unit; the signal output end of the second NOT gate logic unit is connected with the signal input end of the second AND gate logic unit, the signal output end of the first NOT gate logic unit is connected with the signal input end of the first AND gate logic unit, the signal output ends of the first AND gate logic unit and the second AND gate logic unit are both connected with the signal input end of the XOR gate logic unit, and the signal output end of the XOR gate logic unit is connected with the normal position information indicator of the switch and the disconnecting link device;
the device running state input control module comprises a device running state input control switch, a third AND gate logic unit, a fourth AND gate logic unit, a first NOR gate logic unit and a second NOR gate logic unit; the device operation state input control switch is provided with a normal contact, a forced separation contact and a forced combination contact; the signal output end of the normal contact is respectively connected with the signal input ends of the third AND gate logic unit and the fourth AND gate logic unit, the signal output end of the first AND gate logic unit is connected with the signal input end of the fourth AND gate logic unit, and the signal output end of the second AND gate logic unit is connected with the signal input end of the third AND gate logic unit; the signal output end of the forced separation position contact is connected with the signal input end of the first NOR gate logic unit, the signal input end of the first NOR gate logic unit is also connected with the signal output end of the third AND gate logic unit, and the signal output end of the first NOR gate logic unit is connected with the signal input end of the direct current control protection device; the signal output end of the forced closing position contact is connected with the signal input end of a second NOR gate logic unit, the signal input end of the second NOR gate logic unit is also connected with the signal output end of a fourth AND gate logic unit, the signal input end of the fourth AND gate logic unit is also connected with the signal output end of the first AND gate logic unit, and the signal output end of the second NOR gate logic unit is connected with the signal input end of the direct current control protection device; and the signal input end of the direct current control protection device is connected with the signal output end of the fourth AND logic unit.
And the signal output end of the third AND gate logic unit is also connected with a switch and a switch-on indicator of the disconnecting link device.
And the signal output end of the fourth AND gate logic unit is also connected with a switch and a disconnecting indicator of the disconnecting link equipment.
The switch and the knife switch equipment position information normal indicator, the switch and the knife switch equipment closing indicator and the switch and the knife switch equipment closing indicator are all sound and light lamps.
Compared with the prior art, the utility model, its beneficial effect lies in:
the dc control protection device for realizing on-line maintenance of the switching value loop provided by this embodiment can judge whether the switch, the switch-off position and the switch-on position of the disconnecting link device are in normal operation states through the primary detection module of device operation, and meanwhile, on the basis of the primary detection module of device operation, the input control module of device operation state is added, when the loop is not maintained, the dc control protection device adopts the on-off position information of the dc switch type device, when the input loop of the related device state information is abnormal or needs maintenance, the correct position information of the device is sent into the dc control protection device through the position switching operation of the corresponding control unit module, and meanwhile, the fault loop is isolated from the running dc control protection device, thereby realizing the on-line maintenance of the switching value loop of the device. That is, the device does not need to quit the direct current control protection device related to the fault loop, and does not need to carry out software setting work. The direct-current control protection device can provide correct running state information of field switch equipment for the direct-current control protection device through switching operation of a single control module, the problem that the reliability of the direct-current control protection device is reduced due to abnormal switching value input circuit of primary equipment is solved, the hidden danger that the direct-current control protection device is mistakenly operated and refused due to abnormal overhauling and maintenance of the switching value input circuit is avoided, the running reliability of the direct-current control protection device is improved, and the risk that the direct-current control protection device is locked due to abnormal loss of the direct-current control protection device is reduced.
Drawings
Fig. 1 is a logic diagram of a circuit processing of a dc control protection device capable of realizing online maintenance of a switching value circuit provided by an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of a DC control protection device capable of realizing on-line maintenance of a switching value circuit;
in the figure: 100. the equipment operates a primary detection module; 200. the equipment running state is input into the control module; 300. the switch and the disconnecting link equipment are connected at the switch-off position; 400. a switch-on position contact of the switch and the disconnecting link equipment; 500. a direct current control protection device; 10. a first not gate logic unit; 11. a first AND logic unit; 12. a second not gate logic unit; 13. a second AND logic unit; 14. an exclusive-or gate logic unit; 15. a switch and knife switch equipment position information normal indicator; 20. inputting a control switch in the running state of the equipment; 21. a third AND logic unit; 22. a fourth AND logic unit; 23. a first NOR gate logic unit; 24. a second NOR gate logic unit; 25. switch, knife equipment closing indicator; 26. switch, switch equipment separating brake indicator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b):
referring to fig. 1, a logic diagram of a circuit processing of the dc control protection device capable of implementing online maintenance of the switching value circuit according to the present embodiment is shown, where the dc control protection device includes a switch, a disconnecting position contact 300 of the disconnecting link device, a switch, a disconnecting link device closing position contact 400, a device operation primary detection module 100, a device operation state input control module 200, and a dc control protection device 500. Since the dc control protection device 500 is a conventional technology, the specific configuration and operation principle thereof will not be described in detail in this embodiment.
The device operation primary detection module 100 includes a first not gate logic unit 10, a first and gate logic unit 11, a second not gate logic unit 12, a second and gate logic unit 13, an xor gate logic unit 14, and a switch and disconnecting link device position information normal indicator 15. The signal output end of the switch and disconnecting link device disconnecting link position contact 300 is respectively connected with the signal input ends of the first and gate logic unit 11 and the second not gate logic unit 12; the signal output end of the switch-on position contact 400 of the switch and the disconnecting link device is respectively connected with the signal input ends of the first NOT gate logic unit 10 and the second AND gate logic unit 13; the signal output end of the second not gate logic unit 12 is connected with the signal input end of the second and gate logic unit 13, the signal output end of the first not gate logic unit 10 is connected with the signal input end of the first and gate logic unit 11, the signal output ends of the first and gate logic unit 11 and the second and gate logic unit 13 are both connected with the signal input end of the exclusive or gate logic unit 14, and the signal output end of the exclusive or gate logic unit 14 is connected with the switch and knife gate device position information normal indicator 15. Therefore, under the normal operation condition, namely, the operation state information input loops of all the switch equipment have no fault and no maintenance work, the switch and disconnecting link equipment switching-off position contact 300 and the switch and disconnecting link equipment switching-on position contact 400 can only be closed by one of two, at the moment, the normal indicator 15 for the position information of the switch and disconnecting link equipment can work normally, and the maintenance personnel and the equipment are reminded to operate normally.
The device operation state input control module 200 includes a device operation state input control switch 20, a third and logic unit 21, a fourth and logic unit 22, a first nor logic unit 23, and a second nor logic unit 24; wherein, the equipment operation state input control switch 20 is provided with a normal contact, a forced separation contact and a forced combination contact; the signal output end of the normal contact is respectively connected with the signal input ends of the third and logic unit 21 and the fourth and logic unit 22, the signal output end of the first and logic unit 11 is connected with the signal input end of the fourth and logic unit 22, and the signal output end of the second and logic unit 13 is connected with the signal input end of the third and logic unit 21; the signal output end of the forced separation position contact is connected with the signal input end of the first nor gate logic unit 23, the signal input end of the first nor gate logic unit 23 is also connected with the signal output end of the third and gate logic unit 21, and the signal output end of the first nor gate logic unit 23 is connected with the signal input end of the direct current control protection device 500; the signal output end of the strong-closing bit contact is connected with the signal input end of a second nor gate logic unit 24, the signal input end of the second nor gate logic unit 24 is further connected with the signal output end of a fourth and gate logic unit 22, the signal input end of the fourth and gate logic unit 22 is further connected with the signal output end of a first and gate logic unit 11, and the signal output end of the second nor gate logic unit 24 is connected with the signal input end of a direct current control protection device 500; the signal input terminals of the dc-controlled protection device 500 are further connected to the signal output terminals of the third and logic unit 21 and the fourth and logic unit 22.
That is to say, by adding the device operation state input control module 200 on the basis of the device operation primary detection module 100, and in a specific engineering practical application, the device operation state input control modules 200 are all mutually independent and correspond to the switch type devices of the dc control protection device logical operation one to one, as shown in fig. 2, the on-line maintenance of the switching value loop is realized by the switching operation of the position state information of the single device operation state input control switch 20 of the corresponding switch type device, and the problem of the reliability reduction of the dc control protection device caused by the abnormality of the switching value input loop of one time is solved, the hidden danger that the dc control protection device malfunctions and fails to operate caused by the abnormality of the maintenance of the switching value input loop is avoided, and the specific implementation process is as follows:
during normal operation, the device operation state input control switch 20 is in a normal position, at this time, the device operation state input control switch 20 does not output strong on-position and strong off-position information, the input signals of the first nor gate logic unit 23 and the second nor gate logic unit 24 are both low levels, the first nor gate logic unit 23 and the second nor gate logic unit 24 also output low levels, normal operation of the dc control protection device 500 is not affected, and the dc control protection device obtains the operation state of primary devices through the third and gate logic unit 21 and the fourth and gate logic unit 22 of the devices. If the primary equipment is at the switching-off position at this time, that is, the switching-off position contact 300 of the switch and the knife switch equipment is in the closed state, the switching-off state information of the switch and the knife switch equipment is input into the dc control protection device 500 through the third and logic unit 21. Similarly, if the primary device is at the switching-on position, that is, the switching-on position contact 400 of the switch and the knife switch device is in the closed state, the switching-on state information of the switch and the knife switch device is input into the dc control protection device 500 through the fourth and logic unit 22.
When the primary equipment position input loop is in fault or is overhauled, at the moment, an operation and maintenance worker inputs the running state of the equipment into a position where the control switch 20 is forcibly set to be consistent with the actual running state of the field primary equipment, namely if the equipment is in a switching-on state, the equipment running state input control switch 20 is adjusted to be forcibly set to be in a switching-on position, so that a signal of a forcibly-set switching-on position is output, the second NOR gate logic unit 24 inputs a high level, so that a switching-on position signal, namely the high level, is output to the direct current protection device, and the primary equipment is in the switching-on position; similarly, if the device is in the open state, the device operation state input control switch 20 is adjusted to the strong open position, and the first nor gate logic unit 21 inputs the high level, so that the open position signal, i.e. the high level, is output to the dc protection device 500, thereby making the primary device in the open position.
From the above analysis, the dc control protection device for realizing online maintenance of the switching value circuit provided in this embodiment can determine whether the switch, the disconnecting link device and the switching-on position are in the normal operation state through the device operation primary detection module 100, and at the same time, by adding the device operation state input control module 200 on the basis of the device operation primary detection module 100, when the device position input circuit is not maintained for one time, the dc control protection device 500 adopts the switching-on and switching-off position information of the dc switch type device, when the related device state information input circuit is abnormal or needs maintenance, the correct position information of the device is sent to the dc control protection device by inputting the position switching operation of the control switch 20 to the corresponding device operation state, and the fault circuit is isolated from the operating dc control protection device, therefore, the on-line maintenance of the equipment switching value loop is realized, namely, the device does not need to quit a direct current control protection device related to a fault loop and does not need to carry out software counting work. The correct running state information of the field switch equipment can be provided for the direct current control protection device 500 through the switching operation of the single equipment running state input control switch 20, the problem that the reliability of the direct current control protection device is reduced due to the abnormal switching value input circuit of the primary equipment is solved, the hidden danger that the direct current control protection device is mistakenly operated and refused due to the abnormal overhauling and maintenance of the switching value input circuit is avoided, the running reliability of the direct current control protection device is improved, and the risk that the direct current transmission system is locked due to the abnormal loss of the direct current control protection device is reduced.
Meanwhile, as shown in fig. 2, since the device operation state input control modules 200 are all independent and correspond to the switching devices of the dc control protection device in a one-to-one manner, they can be operated separately in the actual engineering without correlation. The single equipment running state control module consists of 3 states, namely a normal state, a strong-setting separation position and a strong-setting closing position, and the equipment running state information can be sent into the direct current control protection device through the switching operation of the single equipment running state input control module 200 so as to ensure the safe and stable running of the direct current control protection system.
As a preferred feature of this embodiment, the signal output terminal of the third and logic unit 21 is further connected to a switch/disconnecting link device closing indicator 25. The signal output of the fourth and logic unit 22 is also connected to a switch and disconnecting switch device tripping indicator 26. Thus, when a certain switch or knife switch switching-on/off loop is abnormal or needs to be overhauled, the device running state input control switch 20 of the corresponding device running state input control module 200 needs to be switched from the normal state to the position consistent with the actual running state of the field device, as shown in fig. 2, if the switch is the switching-off position in the actual running, the running state input control switch 20 of the device running state is switched from the normal state to the strong switching-off position at this time, and the switch and knife switch device switching-off indicator 25 can send out strong switching-off position alarm information to remind the overhaul maintainer to prohibit changing the running mode of the direct current transmission system; if the switch is at the switching-on position in actual operation, the operation state of the equipment is input into the operation state control module of the control switch 20, and the operation state control module is switched from the normal state to the strong switching-on position, and the switching-on indicator of the switch and the disconnecting link equipment can send strong switching-on position alarm information to remind the maintenance personnel to prohibit changing the operation mode of the direct current transmission system. After the operation, on one hand, the fault loop is isolated from the running direct current control protection device, and the maintenance work of the fault loop cannot influence the running direct current control protection device; on the other hand, the correct running state information of the equipment is sent to the direct current control protection device, and the problem that the direct current control protection system operates in a single set due to the fault of the switching value input circuit does not exist.
Specifically, the switch and knife device position information normal indicator 15, the switch and knife device closing indicator 25, and the switch and knife device closing indicator 26 are all sound and light lamps, and remind the maintenance personnel in time.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (4)
1. A direct current control protection device for realizing on-line maintenance of a switching value loop is characterized by comprising a switch and disconnecting link equipment switching-off position contact, a switch and disconnecting link equipment switching-on position contact, an equipment operation primary detection module, an equipment operation state input control module and a direct current control protection device; wherein,
the device operation primary detection module comprises a first NOT gate logic unit, a first AND gate logic unit, a second NOT gate logic unit, a second AND gate logic unit, an XOR gate logic unit, a switch and a switch device position information normal indicator; the signal output ends of the switch and the disconnecting link device disconnecting link position contact are respectively connected with the signal input ends of the first AND gate logic unit and the second NOT gate logic unit; the signal output ends of the switch-on position contact of the switch and the disconnecting link device are respectively connected with the signal input ends of the first NOT gate logic unit and the second AND gate logic unit; the signal output end of the second NOT gate logic unit is connected with the signal input end of the second AND gate logic unit, the signal output end of the first NOT gate logic unit is connected with the signal input end of the first AND gate logic unit, the signal output ends of the first AND gate logic unit and the second AND gate logic unit are both connected with the signal input end of the XOR gate logic unit, and the signal output end of the XOR gate logic unit is connected with the normal position information indicator of the switch and the disconnecting link device;
the device running state input control module comprises a device running state input control switch, a third AND gate logic unit, a fourth AND gate logic unit, a first NOR gate logic unit and a second NOR gate logic unit; the device operation state input control switch is provided with a normal contact, a forced separation contact and a forced combination contact; the signal output end of the normal contact is respectively connected with the signal input ends of the third AND gate logic unit and the fourth AND gate logic unit, the signal output end of the first AND gate logic unit is connected with the signal input end of the fourth AND gate logic unit, and the signal output end of the second AND gate logic unit is connected with the signal input end of the third AND gate logic unit; the signal output end of the forced separation position contact is connected with the signal input end of the first NOR gate logic unit, the signal input end of the first NOR gate logic unit is also connected with the signal output end of the third AND gate logic unit, and the signal output end of the first NOR gate logic unit is connected with the signal input end of the direct current control protection device; the signal output end of the forced closing position contact is connected with the signal input end of a second NOR gate logic unit, the signal input end of the second NOR gate logic unit is also connected with the signal output end of a fourth AND gate logic unit, the signal input end of the fourth AND gate logic unit is also connected with the signal output end of the first AND gate logic unit, and the signal output end of the second NOR gate logic unit is connected with the signal input end of the direct current control protection device; and the signal input end of the direct current control protection device is connected with the signal output end of the fourth AND logic unit.
2. The dc control protection device for on-line maintenance of switching value circuit as claimed in claim 1, wherein the signal output terminal of the third and logic unit is further connected to a switch and a closing indicator of the knife switch device.
3. The direct-current control protection device for realizing the on-line maintenance of the switching value loop as claimed in claim 1 or 2, wherein the signal output end of the fourth AND gate logic unit is further connected with a switch and a disconnecting switch device opening indicator.
4. The DC control protection device for realizing the on-line maintenance of the switching value circuit as claimed in claim 3, wherein the normal indicator of the position information of the switch and the knife switch equipment, the closing indicator of the switch and the knife switch equipment and the closing indicator of the switch and the knife switch equipment are all sound lights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721686011.5U CN207689955U (en) | 2017-12-07 | 2017-12-07 | A kind of DC control protective device for realizing switching value circuit on-bne repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721686011.5U CN207689955U (en) | 2017-12-07 | 2017-12-07 | A kind of DC control protective device for realizing switching value circuit on-bne repair |
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| CN207689955U true CN207689955U (en) | 2018-08-03 |
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|---|---|---|---|
| CN201721686011.5U Withdrawn - After Issue CN207689955U (en) | 2017-12-07 | 2017-12-07 | A kind of DC control protective device for realizing switching value circuit on-bne repair |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107918430A (en) * | 2017-12-07 | 2018-04-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of DC control protective device for realizing switching value circuit on-bne repair |
-
2017
- 2017-12-07 CN CN201721686011.5U patent/CN207689955U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107918430A (en) * | 2017-12-07 | 2018-04-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of DC control protective device for realizing switching value circuit on-bne repair |
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