CN203932976U - The protective relaying device of monitoring switch operation circuit voltage - Google Patents
The protective relaying device of monitoring switch operation circuit voltage Download PDFInfo
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- CN203932976U CN203932976U CN201420305874.3U CN201420305874U CN203932976U CN 203932976 U CN203932976 U CN 203932976U CN 201420305874 U CN201420305874 U CN 201420305874U CN 203932976 U CN203932976 U CN 203932976U
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Abstract
The utility model discloses the protective relaying device of monitoring switch operation circuit voltage, comprise: a trip(ping) circuit, one closing circuit, the one control power supply for trip(ping) circuit and closing circuit power supply, also comprise a monitoring circuit, described monitoring circuit is arranged in parallel in controlling power supply both sides, comprise a Hall voltage transducer, current-limiting resistance and modulate circuit, described Hall voltage transducer is converted to current signal by current-limiting resistance by voltage signal, described modulate circuit carries out after filtering and amplification current signal, current signal is further converted to voltage signal and supplies with AD converter.In control loop, the monitoring circuit of one control supply voltage is set, the current signal that uses Hall voltage transducer to become AD converter can read the voltage transitions of controlling power supply with current-limiting resistance, convert digital quantity to for AD converter, thereby reach the object of Real-Time Monitoring switching manipulation circuit controls supply voltage.
Description
Technical field
The utility model relates to the protective relaying device of monitoring switch operation circuit voltage, relates in particular to energy monitoring switch operation circuit voltage, by detecting the correctness in identifying operation loop, and then the protective device of prompt switch safety in operation.
Background technology
At present; in the protective relaying device of known monitoring switch operation circuit voltage, switching manipulation loop voltage only has control loop broken string to monitor extremely; it is made up of switch close/open machine auxiliary contact, relay, photoisolator, current-limiting resistance, diode etc., as shown in Fig. 1 a and Fig. 1 b.
When control loop is normal, closing operation position relay and tripping position relay always have one to start.When controlling power supply+KM, when the broken string of when-KM dead electricity or broken string or DL inside, closing operation position relay and tripping position relay be dead electricity simultaneously, and the signal of sending into CPU has difference, draws switch control circuit broken string through logic judgement.
But, in a lot of situations switch control power failure in switch in the early stage of development or process as the reduction of controlling power supply can not be found in time, this brings hidden danger to expansion and safe operation of fault.
Summary of the invention
The technical problems to be solved in the utility model is to provide the protective relaying device of monitoring switch operation circuit voltage; in control loop; the monitoring circuit of one control supply voltage is set; the current signal that uses Hall voltage transducer to become AD converter can read the voltage transitions of controlling power supply with current-limiting resistance; convert digital quantity to for AD converter, thereby reach the object of Real-Time Monitoring switching manipulation circuit controls supply voltage.
For achieving the above object, the technical solution of the utility model is as follows:
The protective relaying device of monitoring switch operation circuit voltage, comprising:
One trip(ping) circuit, described trip(ping) circuit comprises tripping position relay and tripping operation normally closed switch mechanism, described trip(ping) circuit and the interlock of CPU control loop,
One closing circuit, described closing circuit comprises closing operation position relay and combined floodgate normal open switch mechanism, described closing circuit and the interlock of CPU control loop,
The one control power supply for trip(ping) circuit and closing circuit power supply,
Also comprise a monitoring circuit, described monitoring circuit is arranged in parallel in controlling power supply both sides, comprise a Hall voltage transducer, current-limiting resistance and modulate circuit, described Hall voltage transducer is converted to current signal by current-limiting resistance by voltage signal, described modulate circuit carries out filtering and amplification to current signal, after then the current signal by filtering and after amplifying converts voltage signal to, supplies with AD converter
Described modulate circuit comprises second-order filter circuit, amplifier filter circuit and discharge circuit, the output of described Hall voltage transducer connects second-order filter circuit, second-order filter circuit carries out filtering to the current signal that enters modulate circuit, amplifier filter circuit further carries out filtering and amplifies for the first time current signal, and discharge circuit amplifies for the second time to current signal.
In a preferred embodiment of the present utility model, also comprise and being arranged between second-order filter circuit and amplifier filter circuit, the diode group being arranged in parallel, the circuit signal after described diode group protection filtering.
In a preferred embodiment of the present utility model, described tripping position relay is arranged in parallel diode D1, and this diode D1 is to current signal afterflow, trip protection position relay.
In a preferred embodiment of the present utility model, described closing operation position relay is arranged in parallel diode D2, and this diode D2, to current signal afterflow, protects closing operation position relay.
By technique scheme, the beneficial effects of the utility model are:
Be arranged in parallel monitoring circuit owing to controlling between power supply, the current signal that uses Hall voltage transducer to become AD converter can read the voltage transitions of controlling power supply with current-limiting resistance, convert digital quantity to for AD converter, thus can Real-Time Monitoring switching manipulation circuit controls supply voltage.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 a is the circuit diagram of the protective relaying device of existing monitoring switch operation circuit voltage;
Fig. 1 b is the power supply circuits schematic diagram of the protective relaying device of existing monitoring switch operation circuit voltage;
Fig. 2 a is circuit diagram of the present utility model.
Fig. 2 b is power supply circuits schematic diagram of the present utility model.
Fig. 3 is the circuit diagram of monitoring circuit of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
With reference to Fig. 2 a and Fig. 2 b, the protective relaying device of monitoring switch operation circuit voltage, comprising:
One trip(ping) circuit, described trip(ping) circuit comprises tripping position relay TWJ and tripping operation normally closed switch mechanism, and is arranged at resistance R 4 between the two, resistance R 5 and resistance R 6; Described trip(ping) circuit and the interlock of CPU control loop; In described tripping operation normally closed switch mechanism, be provided with normally closed control switch and closing coil HC;
One closing circuit, described closing circuit comprises closing operation position relay HWJ and combined floodgate normal open switch mechanism, and is arranged at resistance R 1 between the two, resistance R 2 and resistance R 3; Described closing circuit and the interlock of CPU control loop; In described combined floodgate normal open switch mechanism, arrange and often open control switch and breaking coil TQ;
Described tripping position relay is arranged in parallel diode D1, and this diode D1 is to current signal afterflow, trip protection position relay;
Described closing operation position relay is arranged in parallel diode D2, and this diode D2, to current signal afterflow, protects closing operation position relay;
The output of above-mentioned CPU control loop connects CPU, and the direct voltage of 24V is its power supply, comprise the two-way control circuit being arranged in parallel, one tunnel comprises closing operation position relay HWJ control switch and the inductance L 1 of series connection, and another road comprises tripping position relay TWJ control switch and the inductance L 2 of series connection;
The one control power supply for trip(ping) circuit and closing circuit power supply,
Also comprise a monitoring circuit, described monitoring circuit is arranged in parallel in controlling power supply both sides, comprise a Hall voltage transducer, current-limiting resistance R and modulate circuit, described Hall voltage transducer is converted to current signal by current-limiting resistance R by voltage signal, described modulate circuit carries out filtering and amplification to current signal, after then the current signal by filtering and after amplifying converts voltage signal to, supplies with AD converter
Conventionally current-limiting resistance determines according to the internal resistance of Hall voltage transducer, and current-limiting resistance power should be the more than 3 times of Hall voltage transducer actual power.
With reference to Fig. 3, described modulate circuit comprises second-order filter circuit, amplifier filter circuit and discharge circuit, and the low-pass filtering cut-off frequency of this modulate circuit is 1kHz, output signal voltage is determined according to AD converter.
Wherein second-order filter circuit comprises resistance R in parallel 9, resistance R 10, and this resistance R 9 and resistance R 10 one end ground connection, the other end connects the output of Hall voltage transducer, and second-order filter circuit carries out filtering to the current signal that enters modulate circuit;
Amplifier filter circuit further carries out filtering and amplifies for the first time current signal, comprise operational amplifier U3A, operational amplifier U3A one end connects two groups of RC filter circuits, and one group of RC filter circuit is made up of resistance R 15 and capacitor C 3, and another group RC filter circuit is made up of resistance R 16 and capacitor C 4; The operational amplifier U3A other end connects capacitor C 3;
Also comprise the diode group being arranged in parallel, diode group comprises two diode S2 that are arranged in parallel, the circuit signal after described diode group protection filtering, and this diode group is arranged between second-order filter circuit and amplifier filter circuit.
Discharge circuit amplifies for the second time to current signal, comprise operational amplifier U3B, one end of described operational amplifier U3B is by the output of resistance R 17 concatenation operation amplifier U3A, the another end of operational amplifier U3B is divided into two-way, lead up to resistance R 19 ground connection, separately lead up to the output of resistance R 20 concatenation operation amplifier U3B, the output of described operational amplifier U3B connects AD converter.
More than show and described general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the protective relaying device of monitoring switch operation circuit voltage, comprising:
One trip(ping) circuit, described trip(ping) circuit comprises tripping position relay and tripping operation normally closed switch mechanism, described trip(ping) circuit and the interlock of CPU control loop,
One closing circuit, described closing circuit comprises closing operation position relay and combined floodgate normal open switch mechanism, described closing circuit and the interlock of CPU control loop,
The one control power supply for trip(ping) circuit and closing circuit power supply,
It is characterized in that, also comprise a monitoring circuit, described monitoring circuit is arranged in parallel in controlling power supply both sides, comprise a Hall voltage transducer, current-limiting resistance and modulate circuit, described Hall voltage transducer is converted to current signal by current-limiting resistance by voltage signal, and described modulate circuit carries out filtering and amplification to current signal, then after the current signal by filtering and after amplifying converts voltage signal to, supply with AD converter
Described modulate circuit comprises second-order filter circuit, amplifier filter circuit and discharge circuit, the output of described Hall voltage transducer connects second-order filter circuit, second-order filter circuit carries out filtering to the current signal that enters modulate circuit, amplifier filter circuit further carries out filtering and amplifies for the first time current signal, and discharge circuit amplifies for the second time to current signal.
2. the protective relaying device of monitoring switch operation circuit voltage according to claim 1; it is characterized in that; also comprise and being arranged between second-order filter circuit and amplifier filter circuit, the diode group being arranged in parallel, the circuit signal after described diode group protection filtering.
3. the protective relaying device of monitoring switch operation circuit voltage according to claim 1, is characterized in that, described tripping position relay is arranged in parallel diode D1, and this diode D1 is to current signal afterflow, trip protection position relay.
4. the protective relaying device of monitoring switch operation circuit voltage according to claim 1, is characterized in that, described closing operation position relay is arranged in parallel diode D2, and this diode D2, to current signal afterflow, protects closing operation position relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305874.3U CN203932976U (en) | 2014-06-10 | 2014-06-10 | The protective relaying device of monitoring switch operation circuit voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305874.3U CN203932976U (en) | 2014-06-10 | 2014-06-10 | The protective relaying device of monitoring switch operation circuit voltage |
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| Publication Number | Publication Date |
|---|---|
| CN203932976U true CN203932976U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420305874.3U Expired - Fee Related CN203932976U (en) | 2014-06-10 | 2014-06-10 | The protective relaying device of monitoring switch operation circuit voltage |
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| CN (1) | CN203932976U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064708A (en) * | 2016-12-28 | 2017-08-18 | 国网浙江省电力公司台州供电公司 | Control loop template self-diagnosis system for 10kV switch cubicles |
| CN111308333A (en) * | 2019-11-07 | 2020-06-19 | 广东电网有限责任公司 | Contact resistance detection device and method for relay protection tripping circuit |
| CN113341200A (en) * | 2021-06-07 | 2021-09-03 | 华北电力大学 | Power electronic experiment platform fault monitor |
| CN115267484A (en) * | 2022-05-27 | 2022-11-01 | 国网江苏省电力有限公司南通供电分公司 | Fault monitoring method and system for relay protection operation circuit |
-
2014
- 2014-06-10 CN CN201420305874.3U patent/CN203932976U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064708A (en) * | 2016-12-28 | 2017-08-18 | 国网浙江省电力公司台州供电公司 | Control loop template self-diagnosis system for 10kV switch cubicles |
| CN111308333A (en) * | 2019-11-07 | 2020-06-19 | 广东电网有限责任公司 | Contact resistance detection device and method for relay protection tripping circuit |
| CN113341200A (en) * | 2021-06-07 | 2021-09-03 | 华北电力大学 | Power electronic experiment platform fault monitor |
| CN115267484A (en) * | 2022-05-27 | 2022-11-01 | 国网江苏省电力有限公司南通供电分公司 | Fault monitoring method and system for relay protection operation circuit |
| CN115267484B (en) * | 2022-05-27 | 2024-05-31 | 国网江苏省电力有限公司南通供电分公司 | Relay protection operation loop fault monitoring method and system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20200610 |
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| CF01 | Termination of patent right due to non-payment of annual fee |