CN205283097U - A linkage protection device that is used for transformer neutral point to separate straight equipment - Google Patents
A linkage protection device that is used for transformer neutral point to separate straight equipment Download PDFInfo
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- CN205283097U CN205283097U CN201620044273.0U CN201620044273U CN205283097U CN 205283097 U CN205283097 U CN 205283097U CN 201620044273 U CN201620044273 U CN 201620044273U CN 205283097 U CN205283097 U CN 205283097U
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Abstract
The utility model provides a linkage protection device that is used for transformer neutral point to separate straight equipment, the device includes: insert the bus, connect the N platform and separate straight equipment, main control unit for monitor each state information who separates straight equipment, when judging at a distance from the incomplete unanimity of straight equipment state according to each state information at a distance from straight equipment, transmitting trigger signal triggers the transformer neutal point earthing that the equipment control of straightening corresponds that separates that has moved, the data switching module is connected insert bus and main control unit for the data conversion that will insert in the bus is the distinguishable data of main control unit, and sends the triggering signal conversion that main control unit assigned to inserting the bus. When certain separate that straight equipment breaks down or when losing the unable action of electricity, can all the other regular events of tripping separate straight equipment, make the operation of the equal directly grounded of all transformers, share direct current to avoid a certain platform transformer to bear too big direct current, and protection device, sparingly cost move in a multiple devices sharing all -China federation of taiwan compatriots.
Description
Technical field
The utility model relates to tranformer protection field, particularly relates to a kind of for the linkage protector of transformer neutral point every straight equipment.
Background technology
High voltage direct current transmission (highvoltagedirectcurrenttransmission, HVDC) system owing to its power transmission distance, transmission capacity are big, control the feature such as flexible and obtain and apply more and more widely, but the electric network composition of AC and DC mixed running make between AC and DC system influence each other also all the more obvious. When DC transmission system one pole ground connection or bipolar imbalance are run, galvanic current will inject the earth by earthing pole, in ground, galvanic current invades exchange system by transformer neutral point grounding wire, exchange system is had an impact, and wherein impact the most significantly is exactly cause transformer DC magnetic bias existing.
In order to the impact suppressing direct-current transmission to be run by transformer, transformer neutral point has been installed additional every straight equipment in substations more and more at present or power plant, when galvanic current exceedes limit value, every straight equipment action, transformer neutral point, by the ground connection such as electric capacity or series resistor, plays the effect of isolated DC electric current.
But, there are multiple stage neutral point earthing transformer in many power plant or substation, if when galvanic current increases, there is a certain transformer neutral point cannot the situation of action every straight equipment failure or equipment dead electricity, now this transformer assume responsibility for separately all galvanic currents, sharing without other transformers, galvanic current may exceed design of transformer limit value, even causes the damage of transformer.
Practical novel content
The technical problems to be solved in the utility model is, for the above-mentioned defect of prior art, it is provided that a kind of for the linkage protector of transformer neutral point every straight equipment.
The utility model solves the technical scheme that its technical problem adopts: constructs a kind of for the linkage protector of transformer neutral point every straight equipment, comprising:
Access bus, connect N platform every straight equipment, described every straight equipment be used for the ground connection that neutral point direct current exceedes protection transformer neutral point corresponding to limit value control disconnect and timing the status information of self is sent to access bus, N be more than or equal to 2 positive integer;
Principal controller, for monitoring each status information every straight equipment, judging according to each when straight equipment state is not quite identical every the status information of straight equipment, sending the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action;
Data switch module, connects described access bus and principal controller, for by access bus in data be converted to principal controller can identification data, and principal controller is assigned triggering signal conversion be sent to access bus.
Described in the utility model for transformer neutral point in the linkage protector of straight equipment, described access bus is RS485 bus. Described data switch module is RS485 reception/sending module.
Described in the utility model for transformer neutral point in the linkage protector of straight equipment; described linkage protector also comprises and the alarm module that described principal controller is connected, and described alarm module is used for starting warning when straight equipment state is not quite identical under the control of principal controller.
Described in the utility model for transformer neutral point in the linkage protector of straight equipment; described linkage protector also comprises the man-machine interactively module being connected with described principal controller, and described man-machine interactively module is for the inquiry of data and to the Long-distance Control every straight equipment.
Described in the utility model for transformer neutral point in the linkage protector of straight equipment; described linkage protector also comprises and the liquid-crystal display that described principal controller is connected, and described liquid-crystal display is for receiving and shows the data of principal controller and the information of man-machine interactively module input.
Implement of the present utility model for the linkage protector of transformer neutral point every straight equipment, there is following useful effect: the utility model is by access bus and principal controller, realize multiple stage every the linkage of straight equipment and protection, not quite identical every straight equipment state once discovery, send the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action, therefore when certain every straight equipment break down or dead electricity cannot action time, can all the other normal actions of tripping every straight equipment, make all directly ground connection operation of all transformers, jointly share galvanic current, to avoid a certain transformer to bear excessive neutral point direct current, and multiple stage unit shares a linkage protector, save equipment cost, further, principal controller monitor in real time each transformer galvanic current state, and remote control function can be realized in conjunction with liquid-crystal display, man-machine interactively module.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is of the present utility model for the structural representation of transformer neutral point every the linkage protector of straight equipment.
Embodiment
In order to technology feature of the present utility model, object and effect are had understanding clearly, now compare accompanying drawing and embodiment of the present utility model is described in detail.
With reference to figure 1, it is of the present utility model for the structural representation of transformer neutral point every the linkage protector of straight equipment;
Linkage protector of the present utility model, comprising: access bus, data switch module, principal controller, it is preferable that, also comprise alarm module, man-machine interactively module, liquid-crystal display. Wherein:
Access bus, connect N platform every straight equipment, described every straight equipment be used for the ground connection that neutral point direct current exceedes protection transformer neutral point corresponding to limit value control disconnect and timing the status information of self is sent to access bus, N be more than or equal to 2 positive integer;
Wherein, status information comprises: neutral point direct current and the ground connection cutter lock state every straight equipment, and ground connection cutter lock state comprises the closed state of transformer neutral point earthing and transformer neutral point earthing disconnects opens state.
Preferably, it is possible to adopt RS485 bus as the bus of transfer, it is achieved this linkage protector receives each state data uploaded every straight equipment and linkage protector assigns action triggers signal to each every straight equipment. RS485 agreement can realize the point-to-point information transmission of multiple equipment by the mode of a bus, Address Recognition, saves the use quantity of data line and lays difficulty.
Data switch module, connects described access bus and principal controller, for by access bus in data be converted to principal controller can identification data, and principal controller is assigned triggering signal conversion be sent to access bus. According to RS485 bus, then data switch module can select supporting RS485 transmission/reception module.
Principal controller, for monitoring each status information every straight equipment, judging according to each when straight equipment state is not quite identical every the status information of straight equipment, sending the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action.
Principal controller is the function unit of whole device, it is possible to by common industrial computer and be equipped with special program software practical function. PLC can also be passed through, carry out practical function by PLC is carried out programming.
The utility model is by access bus and principal controller, realize N platform every the linkage of straight equipment and protection, not quite identical every straight equipment state once discovery, send the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action, therefore when certain every straight equipment break down or dead electricity cannot action time, can all the other normal actions of tripping every straight equipment, make all directly ground connection operation of all transformers, jointly share galvanic current, to avoid a certain transformer to bear excessive neutral point direct current; And multiple stage unit shares a linkage protector, save equipment cost.
Concrete, principal controller judge to receive in the default time delay time each when the ground connection cutter lock state of straight equipment is not quite identical, can judge every straight equipment state not quite identical, so principal controller verification is every neutral point direct current corresponding to straight equipment: if principal controller judges that neutral point direct current is less than protection limit value, there is flase operation every straight equipment in what represent action, then principal controller sends the ground connection cutter lock every straight equipment that triggering signal triggers action and enters closed state, so that transformer neutral point ground connection, if neutral point direct current is more than or equal to protection limit value, represent not operating, every straight equipment, refused action occurs, then principal controller sends the triggering signal not operating ground connection cutter lock every straight equipment of triggering and enters the state of opening, so that the ground connection of transformer neutral point disconnects, centering point is protected, if each is not quite identical every the ground connection cutter lock state of straight equipment after the default time delay time, then represent that the ground connection cutter lock state still having part every straight equipment is not according to the triggering signal action of principal controller, then principal controller sends the ground connection cutter lock every straight equipment that triggering signal triggers action and enters closed state, to ensure all transformer neutral point ground connection, and then jointly share the impact of neutral point direct current.
Wherein, presetting the time delay time is consider that data transmission and reception can exist certain time delay. Such as the default time delay time can be set to 5s, but not limit, it is possible to specifically arrange according to practical situation.
Alarm module, is connected with described principal controller, and described alarm module is used for starting warning when straight equipment state is not quite identical under the control of principal controller. Such as alert lamp and hummer are reported to the police, and when principal controller is judged to send sound and light alarm when straight equipment breaks down or falls electricity, remind and run or there is fault in patrol officer's system.
Man-machine interactively module, is connected with described principal controller, such as keyboard, mouse, described man-machine interactively module be used for data inquiry and to the Long-distance Control every straight equipment.
Liquid-crystal display, is connected with described principal controller, and described liquid-crystal display is for receiving and shows the data of principal controller and the information of man-machine interactively module input.
The galvanic current state of principal controller monitor in real time each transformer, and remote control function can be realized in conjunction with liquid-crystal display, man-machine interactively module, such as: during for meeting special requirement such as debugging, hotline maintenance, certain can be forced in a certain state by this device every straight equipment, as when transformer power transmission, to force in ground connection cutter lock make-position every straight equipment, when avoiding power transmission, current imbalance causes transformer to trip, and stable after power transmission cancels forced signal again.
Below with concrete example detail principle of work of the present utility model:
Equaling 4 for N, every platform transformer is equipped with one separately every straight equipment, and status information is uploaded on linkage protector by RS485 bus by each every straight equipment. If when straight equipment action, then the ground connection cutter lock state of its correspondence is for opening state, if when straight equipment is not operating, then the ground connection cutter lock state of its correspondence is closed state.
If principal controller monitors certain the ground connection cutter lock state every straight equipment for opening state in certain moment, then after the default time delay time of time delay 5s, judge whether have the ground connection cutter lock state every straight equipment to be closed state, if also the ground connection cutter lock state of remaining 2 is closed state, then can judge that each is not quite identical every straight equipment state, having 2 actions, 2 not operating. But now and uncertain be the appearance flase operation of 2 actions, or the appearance refused action that 2 are not operating. So next the current value of neutral point direct current checked by principal controller, carry out the judgement of fault type according to neutral point direct current.
If current value is less than the protection limit value every straight equipment, what then judge 2 actions substantially belongs to flase operation every straight equipment, principal controller sends triggering signal to 2 every straight equipment, the ground connection cutter lock every straight equipment triggering action enters closed state, and is reported to the police by alarm module and shown the information done every straight equipment malfunction by liquid-crystal display;
If current value is greater than the protection limit value every straight equipment, then judge that not operating 2 refused action occur every straight equipment, linkage protector sends triggering signal to not operating 2 every straight equipment, trigger its ground connection cutter lock and enter the state of opening, and reported to the police by alarm module and show the information every straight equipment refused action by liquid-crystal display; If after the default time delay time of 5s, still have 1 not operating every straight equipment, namely the ground connection cutter lock state uploaded every straight equipment is still had to be closed state, then send out triggering signal to 3 of other normal actions every straight equipment, trigger its ground connection cutter lock and enter closed state, make the direct ground connection of all transformer neutral points, shared galvanic current.
In sum, implement of the present utility model for the linkage protector of transformer neutral point every straight equipment, there is following useful effect: the utility model is by access bus and principal controller, realize N platform every the linkage of straight equipment and protection, not quite identical every straight equipment state once discovery, send the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action, therefore when certain every straight equipment break down or dead electricity cannot action time, can all the other normal actions of tripping every straight equipment, make all directly ground connection operation of all transformers, jointly share galvanic current, to avoid a certain transformer to bear excessive neutral point direct current, and multiple stage unit shares a linkage protector, save equipment cost, further, principal controller monitor in real time each transformer galvanic current state, and remote control function can be realized in conjunction with liquid-crystal display, man-machine interactively module.
Above in conjunction with accompanying drawing, embodiment of the present utility model is described; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; the those of ordinary skill of this area is under enlightenment of the present utility model; not departing from the utility model objective and in scope situation that claim is protected, also can make a lot of form, these all belong within protection of the present utility model.
Claims (5)
1. one kind for the linkage protector of transformer neutral point every straight equipment, it is characterised in that, comprising:
Access bus, connect N platform every straight equipment, described every straight equipment be used for the ground connection that neutral point direct current exceedes protection transformer neutral point corresponding to limit value control disconnect and timing the status information of self is sent to described access bus, N be more than or equal to 2 positive integer;
Principal controller, for monitoring each status information every straight equipment, judging according to each when straight equipment state is not quite identical every the status information of straight equipment, sending the transformer neutral point ground connection corresponding every straight device control that triggering signal triggers action;
Data switch module, connects described access bus and described principal controller, for the data in described access bus are converted to described principal controller can identification data, and described principal controller is assigned triggering signal conversion be sent to described access bus.
2. according to claim 1 for the linkage protector of transformer neutral point every straight equipment, it is characterised in that, described access bus is RS485 bus, and described data switch module is RS485 reception/sending module.
3. according to claim 1 for the linkage protector of transformer neutral point every straight equipment; it is characterized in that; described linkage protector also comprises and the alarm module that described principal controller is connected, and described alarm module is used for starting warning when straight equipment state is not quite identical under the control of described principal controller.
4. according to claim 1 for the linkage protector of transformer neutral point every straight equipment; it is characterized in that; described linkage protector also comprises the man-machine interactively module being connected with described principal controller, and described man-machine interactively module is for the inquiry of data and to the Long-distance Control every straight equipment.
5. according to claim 4 for the linkage protector of transformer neutral point every straight equipment; it is characterized in that; described linkage protector also comprises and the liquid-crystal display that described principal controller is connected, and described liquid-crystal display is for receiving and shows the data of described principal controller and the information of described man-machine interactively module input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620044273.0U CN205283097U (en) | 2016-01-18 | 2016-01-18 | A linkage protection device that is used for transformer neutral point to separate straight equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620044273.0U CN205283097U (en) | 2016-01-18 | 2016-01-18 | A linkage protection device that is used for transformer neutral point to separate straight equipment |
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| Publication Number | Publication Date |
|---|---|
| CN205283097U true CN205283097U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620044273.0U Active CN205283097U (en) | 2016-01-18 | 2016-01-18 | A linkage protection device that is used for transformer neutral point to separate straight equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490249A (en) * | 2016-01-18 | 2016-04-13 | 阳江核电有限公司 | Linkage protection device for transformer neutral point DC blocking equipment and method thereof |
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2016
- 2016-01-18 CN CN201620044273.0U patent/CN205283097U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490249A (en) * | 2016-01-18 | 2016-04-13 | 阳江核电有限公司 | Linkage protection device for transformer neutral point DC blocking equipment and method thereof |
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