CN111045365A - Modular secondary interface device in transformer substation - Google Patents
Modular secondary interface device in transformer substation Download PDFInfo
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- CN111045365A CN111045365A CN201911317172.0A CN201911317172A CN111045365A CN 111045365 A CN111045365 A CN 111045365A CN 201911317172 A CN201911317172 A CN 201911317172A CN 111045365 A CN111045365 A CN 111045365A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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Abstract
The invention relates to a modular secondary interface device in a transformer substation, which comprises: the information acquisition device is used for acquiring the state information of the switch; the digital-to-analog conversion device receives the state information and converts the state information into a state digital signal; the logic processing device receives the state digital signal and outputs a control signal through logic operation; and the output module is used for inputting the control signal into the secondary loop. The logic operation of the logic processing device on the state digital signal replaces a traditional loop formed by using a relay, the state digital signal is directly operated by the logic processing device without being overlapped layer by layer, the output control signal can be directly input into a secondary loop, components such as various electromagnetic relays and switch travel contacts are greatly reduced, and the installation complexity and danger caused by the series connection and overlapping of the loops are reduced.
Description
Technical Field
The invention relates to the field of transformer substations, in particular to a modular secondary interface device in a transformer substation.
Background
As an important component of an electric power system, a transformer substation plays roles in transmission, conversion, distribution and the like of electric power energy, and the safe operation of the transformer substation is related to the safety and stability of the whole electric power system.
However, in the prior art, a logic loop formed by electromagnetic relays is to switch a switch into each different intermediate relay, and then connect a plurality of contacts of the corresponding intermediate relay in series or in parallel to the loop, and along with the gradual expansion and improvement of the logic of a secondary loop, the contacts of the intermediate relays are often insufficient, and at this time, the contacts are required to be used for re-moving and overlapped layer by layer, and the loop is correspondingly more and more complex. There are more loops connected in series and parallel, and heavy action, resulting in higher complexity and danger of installation.
Disclosure of Invention
In view of the above, there is a need to provide a modular secondary interface device in a substation, which has reduced installation complexity and risk due to circuit series connection and re-actuation.
A modular secondary interface device in a substation, comprising:
the information acquisition device is used for acquiring the state information of the switch;
the digital-to-analog conversion device receives the state information and converts the state information into a state digital signal;
the logic processing device receives the state digital signal and outputs a control signal through logic operation;
and the output module is used for inputting the control signal into the secondary loop.
Through the technical scheme, the logic operation of the logic processing device on the state digital signals replaces a traditional loop formed by using a relay, the state digital signals are directly operated by the logic processing device without being overlapped layer by layer, the output control signals can be directly input into a secondary loop, components such as various electromagnetic relays and switch travel contacts are greatly reduced, and the installation complexity and danger caused by the serial connection and overlapping of the loops are reduced.
In one embodiment, the logical processing device comprises a dual central processor system.
In one embodiment, the information acquisition device simultaneously acquires a part position signal and a part position signal of the switch, and when the information acquisition device simultaneously acquires the part position signal and the part position signal of the switch or the part position signal and the part position signal of the switch which are not acquired at the same time, the logic processing device judges that the state digital signal of the switch is invalid.
In one embodiment, the digital signal processing device further comprises an alarm device, and when the logic processing device judges that the digital signal of the state of the switch is invalid, the alarm device outputs an alarm signal.
In one embodiment, the contacts of the output modules are connected in series or in parallel in the secondary circuit.
In one embodiment, the digital-to-analog conversion device is an optical coupler.
In one embodiment, the logic processing device receives the status digital signal by using an ethernet optical port or an ethernet electrical port.
In one embodiment, the information acquisition device comprises a sensor unit and a filter, wherein the filter is used for filtering the analog quantity acquired by the sensor unit and outputting state information.
In one embodiment, the present application further provides a modular secondary interface method in a substation, including:
collecting state information of a switch;
converting the status information into a status digital signal;
processing the state digital signal according to logic operation and outputting a control signal;
and inputting the control signal into a secondary loop.
In one embodiment, the method comprises the steps of simultaneously acquiring a position separating signal and a position combining signal of the switch, and judging that a state digital signal of the switch is invalid and giving an alarm when the position separating signal and the position combining signal of the switch or the position separating signal and the position combining signal of the switch which are not acquired at the same time are acquired at the same time.
Drawings
Fig. 1 is a schematic structural diagram illustrating a modular secondary interface device in a substation according to an embodiment of the present application;
fig. 2 is a schematic structural diagram illustrating a modular secondary interface device in a substation according to another embodiment of the present application;
fig. 3 is a schematic flow chart showing a method for modular secondary interface in a substation according to an embodiment of the present application.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, in an embodiment of the present application, there is provided an intra-substation modular secondary interface apparatus, including:
and the information acquisition device 10 is used for acquiring the state information of the switch. The information acquisition device 10 includes a sensor unit and a filter, the sensor unit is configured to acquire alternating current mutual inductance current of primary current, mutual inductance voltage of primary voltage, switching-off and switching-on current amounts in a secondary circuit, and direct current mutual inductance current of energy storage motor current amounts, and acquire these currents or voltages to obtain a state of a switch, and the filter performs filtering processing on information such as current acquired by the sensor unit, and then outputs state information of the switch.
The information acquisition device 10 simultaneously acquires the position dividing signal and the position closing signal of a switch, and when the information acquisition device 10 simultaneously acquires the position dividing signal and the position closing signal of a certain switch or does not acquire the position dividing signal and the position closing signal of a certain switch, the logic processing device 12 judges that the state digital signal of the switch is invalid.
For example, when the branch signal of a certain switch is collected to a high level and the close signal is a low level, the switch is judged to be in a branch state; when a switch partial signal is at a low level and a switch-on signal acquires a high level, judging that the switch is in a switch-on state; when the branch signal of a certain switch is at high level and the close signal is also at high level, the logic processing device 12 judges that the state digital signal of the switch is invalid and all logic locks used at the switch position; when the divide signal of a switch is at low level and the close signal is also at low level, the logic processing device 12 determines that the digital signal of the state of the switch is invalid and all logic latches used for the switch position are used.
And the digital-to-analog conversion device 11 receives the control signal state information and converts the control signal state information into a state digital signal. The digital-to-analog converter can be a photoelectric coupler, and the on-off state information output by the filter is converted into state digital information through the photoelectric coupler.
The logic processing device 12, the logic processing device 12 uses the ethernet optical port or the ethernet electrical port to receive the status digital signal, and processes the status digital signal through the logic operation, and outputs the control signal, the logic processing device 12 includes a central processing unit system, the central processing unit performs the logic operation to the received status digital information, because the logic operation in the central processing unit can be set and adjusted, the adjustability of the logic processing device 12 is higher, and the staff can adjust the logic operation more conveniently.
And the output module 13 is used for inputting the control signal into the secondary circuit, and the connection points of the output module 13 are connected in series or in parallel in the secondary circuit.
The logic operation of the logic processing device 12 on the state digital signal replaces a traditional loop formed by using a relay, the state digital signal is directly operated by the logic processing device 12 without being overlapped layer by layer, the output control signal can be directly input into a secondary loop, components such as various electromagnetic relays and switch travel contacts are greatly reduced, and the installation complexity and danger caused by the series connection and overlapping of the loops are reduced.
In other alternative embodiments, the logical processing device 12 comprises a dual central processing unit system, i.e., the logical processing device 12 comprises two separate physical CPUs that are compatible with each other and that configure hardware configurations, such as caches, for the two CPUs, respectively.
As shown in fig. 2, in other optional embodiments, the modular secondary interface device in the substation further includes an alarm device 14, and when the logic processing device 12 determines that the digital status signal of a certain switch is invalid, the alarm device 14 outputs an alarm signal to remind a worker to check the fault location in time.
In an alternative embodiment, as shown in fig. 3, the present application further provides a modular secondary interface method in a substation, comprising the steps of:
and step S1, collecting the state information of the switch.
Specifically, the information acquisition device 10 acquires state information of the switch, the information acquisition device 10 includes a sensor unit and a filter, the sensor unit is configured to acquire alternating current mutual inductance current of primary current, mutual inductance voltage of primary voltage, current magnitude of switching-off and switching-on in a secondary circuit, and direct current mutual inductance current of current magnitude of the energy storage motor, and acquire these currents or voltages to obtain a state of the switch, and the filter performs filtering processing on information such as current acquired by the sensor unit, and then outputs the state information of the switch.
In other optional embodiments, the information acquisition device 10 acquires the on-position signal and the off-position signal of a switch at the same time, and when the information acquisition device 10 acquires the on-position signal and the off-position signal of a certain switch at the same time or does not acquire the on-position signal and the off-position signal of a certain switch at the same time, the logic processing device 12 determines that the state digital signal of the switch is invalid.
Step S2: converting the status information into a status digital signal.
Specifically, the control signal state information is received by the digital-to-analog conversion device 11 and converted into a state digital signal. The digital-to-analog converter can be a photoelectric coupler, and the on-off state information output by the filter is converted into state digital information through the photoelectric coupler.
Step S3: and processing the state digital signal according to logic operation and outputting a control signal.
Specifically, the logic processing device 12 is used for processing the state digital signal in an operation mode and outputting the control signal, the editing processing device comprises a central processing unit system, the central processing unit is used for carrying out logic operation on the received state digital information, and the logic operation in the central processing unit can be set and adjusted, so that the adjustability of the logic processing device 12 is higher, and the adjustment of the logic operation by a worker is more convenient.
Step S4: and inputting the control signal into a secondary loop.
The control signal can be input into the secondary circuit by connecting the contacts of the output module 13 in series or in parallel in the secondary circuit.
The logic operation of the logic processing device 12 on the state digital signal replaces a traditional loop formed by using a relay, the state digital signal is directly operated by the logic processing device 12 without being overlapped layer by layer, the output control signal can be directly input into a secondary loop, various components such as an electromagnetic relay and the like and switch stroke contacts are greatly reduced, and the installation complexity and danger caused by the series connection and overlapping of the loop are reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a modular secondary interface device in transformer substation which characterized in that includes:
the information acquisition device is used for acquiring the state information of the switch;
the digital-to-analog conversion device receives the state information and converts the state information into a state digital signal;
the logic processing device receives the state digital signal and outputs a control signal through logic operation;
and the output module is used for inputting the control signal into the secondary loop.
2. An intra-substation modular secondary interface device according to claim 1,
the logic processing device comprises a dual central processing unit system.
3. An intra-substation modular secondary interface device according to claim 1,
the information acquisition device simultaneously acquires the position dividing signal and the position closing signal of the switch, and when the information acquisition device simultaneously acquires the position dividing signal and the position closing signal of the switch or simultaneously acquires the position dividing signal and the position closing signal of the switch, the logic processing device judges that the state digital signal of the switch is invalid.
4. An in-substation modular secondary interface device according to claim 3,
the alarm device is also included, and when the logic processing device judges that the digital signal of the state of the switch is invalid, the alarm device outputs an alarm signal.
5. An intra-substation modular secondary interface device according to claim 1,
the contacts of the output modules are connected in series or in parallel in the secondary circuit.
6. An intra-substation modular secondary interface device according to claim 1,
the digital-to-analog conversion device is a photoelectric coupler.
7. An intra-substation modular secondary interface device according to claim 1,
and the logic processing device adopts an Ethernet optical port or an Ethernet electric port to receive the state digital signal.
8. An intra-substation modular secondary interface device according to claim 1,
the information acquisition device comprises a sensor unit and a filter, wherein the filter is used for filtering the information acquired by the sensor unit and outputting state information.
9. A modular secondary interface method in a transformer substation is characterized by comprising the following steps:
collecting state information of a switch;
converting the status information into a status digital signal;
processing the state digital signal according to logic operation and outputting a control signal;
and inputting the control signal into a secondary loop.
10. The intra-substation modular secondary interface method according to claim 9, characterized in that: collecting the state information of the switch includes:
and simultaneously acquiring the position dividing signal and the position closing signal of the switch, and judging that the state digital signal of the switch is invalid and giving an alarm when the position dividing signal and the position closing signal of the switch or the position dividing signal and the position closing signal of the switch which are not acquired at the same time are acquired at the same time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911317172.0A CN111045365A (en) | 2019-12-19 | 2019-12-19 | Modular secondary interface device in transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911317172.0A CN111045365A (en) | 2019-12-19 | 2019-12-19 | Modular secondary interface device in transformer substation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3863119B2 (en) * | 2003-03-11 | 2006-12-27 | 株式会社東芝 | Substation monitoring and control system |
| CN103023142A (en) * | 2012-11-27 | 2013-04-03 | 石家庄科林电气股份有限公司 | Channel-allocable power distribution automatization station terminal and allocation method |
| CN103200280A (en) * | 2013-02-20 | 2013-07-10 | 中国电力科学研究院 | Process level interface device of intelligent substation |
| CN103580282A (en) * | 2013-10-24 | 2014-02-12 | 深圳供电局有限公司 | Intelligent interface device for primary equipment in transformer substation |
| CN203788045U (en) * | 2013-10-24 | 2014-08-20 | 深圳供电局有限公司 | Intelligent interface device for primary equipment in transformer substation |
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- 2019-12-19 CN CN201911317172.0A patent/CN111045365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3863119B2 (en) * | 2003-03-11 | 2006-12-27 | 株式会社東芝 | Substation monitoring and control system |
| CN103023142A (en) * | 2012-11-27 | 2013-04-03 | 石家庄科林电气股份有限公司 | Channel-allocable power distribution automatization station terminal and allocation method |
| CN103200280A (en) * | 2013-02-20 | 2013-07-10 | 中国电力科学研究院 | Process level interface device of intelligent substation |
| CN103580282A (en) * | 2013-10-24 | 2014-02-12 | 深圳供电局有限公司 | Intelligent interface device for primary equipment in transformer substation |
| CN203788045U (en) * | 2013-10-24 | 2014-08-20 | 深圳供电局有限公司 | Intelligent interface device for primary equipment in transformer substation |
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Application publication date: 20200421 |