CN109738676B - Frequency signal wiring switching device and application method thereof - Google Patents
Frequency signal wiring switching device and application method thereof Download PDFInfo
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- CN109738676B CN109738676B CN201910168132.8A CN201910168132A CN109738676B CN 109738676 B CN109738676 B CN 109738676B CN 201910168132 A CN201910168132 A CN 201910168132A CN 109738676 B CN109738676 B CN 109738676B
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- 238000012360 testing method Methods 0.000 description 14
- 238000011990 functional testing Methods 0.000 description 2
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Abstract
The invention discloses a frequency signal wiring switching device and an application method thereof, wherein the device comprises a change-over switch, a first diode D1, a second diode D2, an electromagnetic relay D3 and a control module U, wherein a fixed terminal S and a frequency signal output terminal B of the change-over switch are connected with a first frequency signal input terminal A1 through the first diode D1, the other movable connection terminal S2 is connected with a second frequency signal input terminal A2 through the second diode D2 and the electromagnetic relay D3, a control end of the electromagnetic relay D3 is connected with an output end of the control module U, and a voltage detection terminal of the control module U is respectively connected with the fixed terminal S and the movable connection terminal S2; the method is based on the device to realize signal switching. The invention can realize the switching of the frequency signal source between the frequency signal generator and the secondary side signal of the generator outlet PT of the generator set, and has the advantages of safety, reliability, convenience and rapidness.
Description
Technical Field
The invention relates to frequency disturbance test equipment of a generator set, in particular to a frequency signal wiring switching device and an application method thereof, which can be used for test items such as a functional test of a speed regulation system of the generator set, a primary frequency modulation test of the generator set, a parameter actual measurement and modeling test of the generator set and the like.
Background
Along with the development of power technology, the requirements of people on the running reliability of power equipment are higher and higher, the national standard requirements are also stricter, and more power plants can carry out functional tests of a speed regulation system, primary frequency modulation tests of a generator set, actual measurement and modeling tests of parameters of the generator set and other test projects according to relevant standards after the speed regulation system of the generator set is overhauled. The related performance of the equipment can be tested by carrying out frequency disturbance through a testing instrument, the signal source of the unit speed regulating system is required to switch between the frequency signal generator and the signal of the secondary side of the generator outlet PT of the generator set for multiple times, the hardware switching equipment and the software switching system used in the past test often cannot well realize signal switching, and sometimes the problems of frequency generation errors, short circuit of the signals of the frequency signal generator and the secondary side of the generator outlet PT of the generator set, difficult start-up of the generator set, burning of the testing equipment and the like can also occur; when the generator set is subjected to signal switching in a grid-connected state, even power fluctuation and even tripping occur, so that safe and reliable operation of a power grid is affected.
Disclosure of Invention
The invention aims to solve the technical problems: aiming at the problems in the prior art, the invention provides the frequency signal wiring switching device and the application method thereof, which can realize the switching of the frequency signal source between the frequency signal generator and the secondary side signal of the generator outlet PT of the generator set and have the advantages of safety, reliability, convenience and rapidness.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a frequency signal wiring auto-change over device, frequency signal wiring auto-change over device has first frequency signal input terminal A1, second frequency signal input terminal A2 and frequency signal output terminal B, frequency signal wiring auto-change over device includes change over switch, first diode D1, second diode D2, electromagnetic relay D3 and control module U, change over switch 'S fixed terminal S and frequency signal output terminal B, one swing joint terminal S1 links to each other with first frequency signal input terminal A1 through first diode D1, another swing joint terminal S2 links to each other with second frequency signal input terminal A2 through second diode D2, electromagnetic relay D3' S control end links to each other with control module U 'S output, control module U' S voltage detection terminal links to each other with fixed terminal S, swing joint terminal S2 respectively.
Preferably, a first closing indicator lamp P1 is arranged in parallel between the fixed terminal S and one movable connection terminal S1 of the switch, and a second closing indicator lamp P2 is arranged in parallel between the fixed terminal S and the other movable connection terminal S2 of the switch.
Preferably, the frequency signal output terminal B is further connected with a frequency display F.
Preferably, the electromagnetic relay D3 is a normally closed node relay.
Preferably, the control module U is provided with a control signal input end, and the control signal input end of the control module U is connected with a generator set GCB closing signal.
Preferably, the control module U is a singlechip module.
The invention also provides an application method of the frequency signal wiring switching device, which comprises the following implementation steps:
1) The method comprises the steps of respectively connecting a first frequency signal input terminal A1 with a frequency signal generator, connecting a second frequency signal input terminal A2 with a signal line on the secondary side of a generator outlet PT of the generator set, connecting a frequency signal output terminal B with a frequency tester and a frequency measuring terminal of a speed regulator of the generator set, and connecting a frequency detection terminal of a control module U with the frequency signal generator;
2) The control module U respectively collects the closing signals of the generator set GCB, detects closing state signals between the fixed terminal S and the movable connecting terminal S2 through the voltage detection terminal, and judges whether the output frequency of the frequency signal generator exceeds a preset threshold value or not when the generator set GCB closing signals show that the generator set is in a power generation state and the closing state signals between the fixed terminal S and the movable connecting terminal S2 are in a closing state, and if the output frequency exceeds the preset threshold value, the control module U controls the electromagnetic relay D3 to cut off a passage between the fixed terminal S and the movable connecting terminal S2.
Compared with the prior art, the frequency signal wiring switching device has the following advantages: the invention relates to a frequency signal wiring switching device which comprises a change-over switch, a first diode D1, a second diode D2, an electromagnetic relay D3 and a control module U, wherein a fixed terminal S and a frequency signal output terminal B of the change-over switch, one movable connecting terminal S1 is connected with a first frequency signal input terminal A1 through the first diode D1, the other movable connecting terminal S2 is connected with a second frequency signal input terminal A2 through the second diode D2 and the electromagnetic relay D3, a control end of the electromagnetic relay D3 is connected with an output end of the control module U, and a voltage detection terminal of the control module U is respectively connected with the fixed terminal S and the movable connecting terminal S2. The application method of the frequency signal wiring switching device can realize the switching of the frequency signal source between the frequency signal generator and the secondary side signal of the generator outlet PT of the generator set, and can also realize that the output frequency of the frequency signal generator is not output when the output frequency exceeds the preset threshold value, thereby being capable of preventing equipment damage caused by the wrong frequency, and having the advantages of safety, reliability, convenience and rapidness.
Drawings
Fig. 1 is a schematic circuit structure of an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the frequency signal wiring switching device of the present embodiment has a first frequency signal input terminal A1, a second frequency signal input terminal A2, and a frequency signal output terminal B.
As shown in fig. 1, the frequency signal connection switching device of this embodiment includes a switch, a first diode D1, a second diode D2, an electromagnetic relay D3, and a control module U, where a fixed terminal S and a frequency signal output terminal B of the switch, a movable connection terminal S1 is connected to the first frequency signal input terminal A1 through the first diode D1, and another movable connection terminal S2 is connected to the second frequency signal input terminal A2 through the second diode D2 and the electromagnetic relay D3, and a control end of the electromagnetic relay D3 is connected to an output end of the control module U, and a voltage detection terminal of the control module U is connected to the fixed terminal S and the movable connection terminal S2 respectively. The position of the fixed terminal S of the change-over switch can be adjusted according to the test item during the test, so that the switching of the frequency signal source between the frequency signal generator and the secondary side signal of the generator outlet PT of the generator set can be realized, and the device has the advantages of safety, reliability, convenience and rapidness. Because the voltage of the secondary side of the generator set PT is higher, the first diode D1 and the second diode D2 can prevent the change-over switch from short circuit or signal interference after miswiring and damaging instruments and equipment.
As can be seen from fig. 1, the control module U controls the electromagnetic relay D3 to switch on and off the circuit by collecting the switching-on signal A3 of the generator set GCB and the second working state (the fixed terminal S is communicated with the movable connection terminal S2) of the switch, and the judgment mode of the control module U is shown in step 2).
As shown in fig. 1, a first closing indicator lamp P1 is arranged in parallel between a fixed terminal S and a movable connection terminal S1 of the change-over switch, and when the fixed terminal S is communicated with the movable connection terminal S1, the first closing indicator lamp P1 emits light, so as to indicate a first working state of the change-over switch; a second closing indicator lamp P2 is arranged in parallel between the fixed terminal S and the other movable connecting terminal S2 of the change-over switch, and when the fixed terminal S is communicated with the other movable connecting terminal S2, the second closing indicator lamp P2 emits light, so that a second working state of the change-over switch is indicated.
As shown in fig. 1, the frequency signal output terminal B is further connected with a frequency display F, where the frequency display F is used for displaying the frequency output by the circuit in real time, so that the test personnel can judge the test state.
As shown in fig. 1, the electromagnetic relay D3 is a normally closed node relay.
As shown in fig. 1, the control module U is provided with a control signal input end, and the control signal input end of the control module U is connected with a generator set GCB closing signal.
In this embodiment, the control module U is a single-chip microcomputer module.
The implementation steps of the application method of the frequency signal wiring switching device in this embodiment include:
1) The method comprises the steps of respectively connecting a first frequency signal input terminal A1 with a frequency signal generator, connecting a second frequency signal input terminal A2 with a signal line on the secondary side of a generator outlet PT of the generator set, connecting a frequency signal output terminal B with a frequency tester and a frequency measuring terminal of a speed regulator of the generator set, and connecting a frequency detection terminal of a control module U with the frequency signal generator;
2) The control module U respectively collects a generator set GCB closing signal (the generator set is in a power generation state), and detects closing state signals between the fixed terminal S and the movable connection terminal S2 through the voltage detection terminal, when the generator set GCB closing signal shows that the generator set is in the power generation state, and the closing state signals between the fixed terminal S and the movable connection terminal S2 are in the closing state, the control module U judges whether the output frequency of the frequency signal generator exceeds a preset threshold value, if the output frequency exceeds the preset threshold value, the control module U controls the electromagnetic relay D3 to cut off a passage between the fixed terminal S and the movable connection terminal S2, namely, the closing state signals are not output when the output frequency of the frequency signal generator exceeds the preset threshold value, and therefore equipment damage caused by sending out error frequency can be prevented. Through the frequency signal wiring switching device, the switching of the frequency signal source between the frequency signal generator and the secondary side signal of the generator outlet PT of the generator set can be safely and quickly realized.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (6)
1. An application method of a frequency signal wiring switching device is characterized in that: the frequency signal wiring switching device is provided with a first frequency signal input terminal A1, a second frequency signal input terminal A2 and a frequency signal output terminal B, the frequency signal wiring switching device comprises a change-over switch, a first diode D1, a second diode D2, an electromagnetic relay D3 and a control module U, a fixed terminal S of the change-over switch is connected with the frequency signal output terminal B, one movable connecting terminal S1 is connected with the first frequency signal input terminal A1 through the first diode D1, the other movable connecting terminal S2 is connected with the second frequency signal input terminal A2 through the second diode D2 and the electromagnetic relay D3, a control end of the electromagnetic relay D3 is connected with an output end of the control module U, and a voltage detection terminal of the control module U is respectively connected with the fixed terminal S and the movable connecting terminal S2; the application method comprises the following steps: 1) The method comprises the steps of respectively connecting a first frequency signal input terminal A1 with a frequency signal generator, connecting a second frequency signal input terminal A2 with a signal line on the secondary side of a generator outlet PT of a generator set, respectively connecting a frequency signal output terminal B with a frequency tester and a frequency measuring terminal of a generator set speed regulator, and connecting a frequency detection terminal of a control module U with the frequency signal generator; 2) The control module U respectively collects the closing signals of the generator set GCB, detects closing state signals between the fixed terminal S and the movable connecting terminal S2 through the voltage detection terminal, and judges whether the output frequency of the frequency signal generator exceeds a preset threshold value or not when the generator set GCB closing signals show that the generator set is in a power generation state and the closing state signals between the fixed terminal S and the movable connecting terminal S2 are in a closing state, and if the output frequency exceeds the preset threshold value, the control module U controls the electromagnetic relay D3 to cut off a passage between the fixed terminal S and the movable connecting terminal S2.
2. The method for applying a frequency signal wiring switching device according to claim 1, wherein: a first closing indicator lamp P1 is arranged in parallel between the fixed terminal S and one movable connecting terminal S1 of the change-over switch, and a second closing indicator lamp P2 is arranged in parallel between the fixed terminal S and the other movable connecting terminal S2 of the change-over switch.
3. The method for applying a frequency signal wiring switching device according to claim 1, wherein: the frequency signal output terminal B is also connected with a frequency display F.
4. The method for applying a frequency signal wiring switching device according to claim 1, wherein: the electromagnetic relay D3 is a normally closed node relay.
5. The method for applying a frequency signal wiring switching device according to claim 1, wherein: the control module U is provided with a control signal input end, and the control signal input end of the control module U is connected with a generator set GCB closing signal.
6. The method for applying a frequency signal wiring switching device according to claim 1, wherein: the control module U is a singlechip module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168132.8A CN109738676B (en) | 2019-03-06 | 2019-03-06 | Frequency signal wiring switching device and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910168132.8A CN109738676B (en) | 2019-03-06 | 2019-03-06 | Frequency signal wiring switching device and application method thereof |
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| CN109738676A CN109738676A (en) | 2019-05-10 |
| CN109738676B true CN109738676B (en) | 2023-11-24 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018465Y (en) * | 2006-12-01 | 2008-02-06 | 西安理工大学 | Digital type rotation speed relay |
| CN201571151U (en) * | 2010-01-04 | 2010-09-01 | 青岛海信电器股份有限公司 | Multiway voltage switching circuit and television set test circuit |
| CN102590612A (en) * | 2012-03-05 | 2012-07-18 | 广西电网公司电力科学研究院 | Intelligent time frequency signal switcher |
| CN102830352A (en) * | 2012-07-26 | 2012-12-19 | 广东电网公司电力科学研究院 | Simulation test method of field isolated network and system thereof |
| CN204331376U (en) * | 2014-12-31 | 2015-05-13 | 珠海柏卫宽带电子有限公司 | Protect flow-through radio frequency converting switch |
| CN205450216U (en) * | 2016-03-03 | 2016-08-10 | 西安热工研究院有限公司 | Hydroelectric set primary control is experimental with quick -witted class frequency switch |
| KR20160114797A (en) * | 2015-03-24 | 2016-10-06 | 대성전기공업 주식회사 | Electronic Switching Device |
| CN106788021A (en) * | 2016-12-19 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of field power supply synchronous signal acquisition processing method and processing device |
| JP2018050446A (en) * | 2016-09-15 | 2018-03-29 | 株式会社東芝 | Device and method for controlling doubly-fed alternator |
| CN109217332A (en) * | 2018-09-29 | 2019-01-15 | 中信建筑设计研究总院有限公司 | A kind of automatic switchover system of pair of generating set reactive compensation |
| CN209746015U (en) * | 2019-03-06 | 2019-12-06 | 湖南省湘电试验研究院有限公司 | Frequency signal wiring switching device |
-
2019
- 2019-03-06 CN CN201910168132.8A patent/CN109738676B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018465Y (en) * | 2006-12-01 | 2008-02-06 | 西安理工大学 | Digital type rotation speed relay |
| CN201571151U (en) * | 2010-01-04 | 2010-09-01 | 青岛海信电器股份有限公司 | Multiway voltage switching circuit and television set test circuit |
| CN102590612A (en) * | 2012-03-05 | 2012-07-18 | 广西电网公司电力科学研究院 | Intelligent time frequency signal switcher |
| CN102830352A (en) * | 2012-07-26 | 2012-12-19 | 广东电网公司电力科学研究院 | Simulation test method of field isolated network and system thereof |
| CN204331376U (en) * | 2014-12-31 | 2015-05-13 | 珠海柏卫宽带电子有限公司 | Protect flow-through radio frequency converting switch |
| KR20160114797A (en) * | 2015-03-24 | 2016-10-06 | 대성전기공업 주식회사 | Electronic Switching Device |
| CN205450216U (en) * | 2016-03-03 | 2016-08-10 | 西安热工研究院有限公司 | Hydroelectric set primary control is experimental with quick -witted class frequency switch |
| JP2018050446A (en) * | 2016-09-15 | 2018-03-29 | 株式会社東芝 | Device and method for controlling doubly-fed alternator |
| CN106788021A (en) * | 2016-12-19 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of field power supply synchronous signal acquisition processing method and processing device |
| CN109217332A (en) * | 2018-09-29 | 2019-01-15 | 中信建筑设计研究总院有限公司 | A kind of automatic switchover system of pair of generating set reactive compensation |
| CN209746015U (en) * | 2019-03-06 | 2019-12-06 | 湖南省湘电试验研究院有限公司 | Frequency signal wiring switching device |
Non-Patent Citations (1)
| Title |
|---|
| 调速器机频、网频异常的分析和处理;胡香梅;水电站机电技术;第36卷(第4期);第67-70页 * |
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