CN102545137B - Adaptive circuit for monitoring and protecting device of electric power system - Google Patents
Adaptive circuit for monitoring and protecting device of electric power system Download PDFInfo
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- CN102545137B CN102545137B CN201210059325.8A CN201210059325A CN102545137B CN 102545137 B CN102545137 B CN 102545137B CN 201210059325 A CN201210059325 A CN 201210059325A CN 102545137 B CN102545137 B CN 102545137B
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Abstract
The invention provides an adaptive circuit for a monitoring and protecting device of an electric power system. The adaptive circuit comprises an input conversion circuit, a current switching control circuit, a timing control circuit and an output interface circuit, wherein the current switching control circuit is connected with the input conversion circuit; the timing control circuit is connected with the current switching control circuit as well as the output interface circuit; and the timing control circuit detects the output time of the output interface circuit and controls the connection and disconnection of the current switching control circuit according to the output time.
Description
Technical field
The present invention relates to a kind of adapter circuit of electric power system measuring and controlling protective device.
Background technology
The operation principle that the common protective device operation circuit of electric power system is introduced operation circuit as shown in Figure 1; KM+, KM-connect 220V direct current operative power source; when protective device or closing by hand button send after closing pulse signal; current relay HBJ inhale and; HBJ-1 connects, and keeps operation circuit to connect, and controls circuit breaker and carry out closing operation in circuit breaker after switching-on mechanism (as tripping coil) energising; after combined floodgate completes, auxiliary contact DL in closing position disconnects, thus rupturing operation loop.Because HBJ belongs to current relay, operating current is generally 0.2-0.5A, so in loop, requires electric current to reach this scope just can to maintain self-sustaining.The operating current of traditional spring operating mechanism drive coil can meet this index, therefore can directly connect use.
Along with the development of permanent-magnetic switching, its application is more and more extensive, because permanent-magnetic switching need to be controlled by special driver, its input mostly is remote signalling input mode, input voltage and electric current are all very low, are only generally 24V, 10mA left and right, can not meet and combine the requirement of protecting operation circuit.The conventional method of industry is that high-power resistance in parallel solves adaptive problem at present, due to the high-power resistance that need to adopt more than 100W, install very difficultly, be difficult to be integrated into internal drive, make wiring complicated, reliability is low, after switchgear breaks down, to combine guarantor's operation circuit and can export 220V operating voltage always, this voltage continues to be loaded on high-power resistance, cause resistance heating serious, even burn-out resistance.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art; provide a kind of volume of circuit little, easy to use, there is fault automatic protection functions, can directly connect the adapter circuit of the electric power system measuring and controlling protective device of various complex protection devices.
The main technical schemes adopting according to the adapter circuit of a kind of electric power system measuring and controlling protective device provided by the invention is: comprise input change-over circuit, the current switching control circuit being connected with described input change-over circuit, the timing control circuit and the output interface circuit that are connected with described current switching control circuit; described timing control circuit is also connected with described output interface circuit; described timing control circuit detects the output time of described output interface circuit, and controls described current switching control circuit break-make according to output time.
The adapter circuit of a kind of electric power system measuring and controlling protective device provided by the invention also has following additional technical feature:
Described current switching control circuit comprises resistance R 2, resistance R 6, field effect transistor Q1, resistance R 3 and voltage stabilizing didoe D1, after described resistance R 6 is in parallel with described field effect transistor Q1, connect with described resistance R 2 again, described resistance R 3 is connected with the G utmost point with the D utmost point of described field effect transistor Q1, and described voltage stabilizing didoe D1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1.
Described timing control circuit comprises capacitor C 2, switching tube U1, resistance R 4, resistance R 5, resistance R 7 and capacitor C 3, described resistance R 5, resistance R 7 and described capacitor C 3 link together and form RC timing circuit, described RC timing circuit is connected with described output interface circuit, described switching tube U1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1, the control end of described switching tube U1 is connected with described RC timing circuit, described capacitor C 2 is in parallel with described switching tube U1, and described resistance R 4 is serially connected in described capacitor C 3.
Described output interface circuit comprises resistance R 1 and relay J Q1, and described resistance R 1 is connected with the coil of described relay J Q1.
Described input change-over circuit comprises rectification circuit DB1 and capacitor C 1, and described capacitor C 1 is connected with the output of described rectification circuit DB1.
Adopt the beneficial effect that the adapter circuit of a kind of electric power system measuring and controlling protective device provided by the invention brings to be: this circuit is by adopting time delay mode to protect operation circuit; when operation circuit turn-on time overtime by force disconnect operation circuit with protection adapter circuit; the volume of circuit is little, automatic protection functions, alternating current-direct current are compatible, can conveniently connect various complex protection devices.
Accompanying drawing explanation
Fig. 1 is the operation principle block diagram in prior art closing operation loop.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Referring to Fig. 2, the embodiment of the adapter circuit of a kind of electric power system measuring and controlling protective device providing in the present invention, comprise input change-over circuit 1, the current switching control circuit 2 being connected with described input change-over circuit 1, the timing control circuit 3 and the output interface circuit 4 that are connected with described current switching control circuit 2, described timing control circuit 3 is also connected with described output interface circuit 4, described timing control circuit 3 detects the output time of described output interface circuit 4, and control described current switching control circuit 2 break-makes according to output time, the structure that the present invention adopts is electronic variable support structures, by carrying out the operating characteristic of mould spring operating mechanism during resistance and field effect transistor, described current switching control circuit 2 comprises resistance R 2, resistance R 6, field effect transistor Q1, resistance R 3 and voltage stabilizing didoe D1, after described resistance R 6 is in parallel with described field effect transistor Q1, connect with described resistance R 2 again, described resistance R 3 is connected with the G utmost point with the D utmost point of described field effect transistor Q1, described voltage stabilizing didoe D1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1, this circuit is by adopting time delay mode to protect operation circuit, when operation circuit overtime by force disconnect operation circuit turn-on time, with protection adapter circuit.
Referring to Fig. 2, according to the adapter circuit of electric power system measuring and controlling protective device provided by the invention, described timing control circuit 3 comprises capacitor C 2, switching tube U1, resistance R 4, resistance R 5, resistance R 7 and capacitor C 3, described resistance R 5, resistance R 7 and described capacitor C 3 link together and form RC timing circuit 31, described RC timing circuit 31 is connected with described output interface circuit 4, described switching tube U1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1, the control end of described switching tube U1 is connected with described RC timing circuit, described capacitor C 2 is in parallel with described switching tube U1, described resistance R 4 is serially connected in described capacitor C 3, described output interface circuit 4 comprises resistance R 1 and relay J Q1, described resistance R 1 is connected with the coil of described relay J Q1, described input change-over circuit 1 comprises rectification circuit DB1 and capacitor C 1, described capacitor C 1 is connected with the output of described rectification circuit DB1.
Operation principle:
When protective device is normally worked, operation can produce the electric current of 10-15mA in refluxing; minute position state that closes for detection of switch; this signal is added in resistance R 2 through input switching current and above field effect transistor Q1; because the start voltage of field effect transistor Q1 is about 5V; so the D of field effect transistor Q1, S the two poles of the earth have the pressure drop of 5V left and right, can keep complex protection device to have normal loop current.
When protective device sends control signal, can export the voltage signal of 220V, this voltage is loaded into resistance R 2 and resistance R 6 after over commutation and filtering, on field effect transistor Q1, because the circuit of field effect transistor Q1 makes D, S only has at the two poles of the earth the pressure drop of 5V, all the other voltages are all added on power resistor R2, the resistance of resistance R 2 is less, produce and be applicable to the electric current that protective device requires, this voltage also can be loaded on relay J Q1 after resistance R 1 dividing potential drop, relay J Q1 must conduct inhale and, connect remote signalling on/off switch input signal and remote signalling power supply, for driver provides control signal.After switch complete operation, corresponding auxiliary contact can disconnect, and are that whole operation circuit disconnects, and the voltage that is loaded into adapter circuit also can disappear.
When the closing minute position auxiliary contact and break down of switch, even if switch completes corresponding on/off switch operation, in operation circuit, electric current continues always, due to relay adhesive always, can charge through 5 pairs of capacitor C 3 of resistance R, when condenser voltage surpasses the threshold voltage of switching tube U1, the G of U1 conducting short circuit field effect transistor Q1, S the two poles of the earth, make G, the voltage at S the two poles of the earth is close to zero, at this moment field effect transistor Q1 cut-off, electric current is via resistance R 6, at this moment the D of field effect transistor Q1, the voltage at S the two poles of the earth is about the more than 50% of operating voltage, this voltage can maintain the charging to capacitor C 3 through resistance R 4, thereby maintain the threshold voltage that voltage in capacitor C 3 reaches U1, make field effect transistor Q1 always in cut-off state.
Claims (4)
1. the adapter circuit of an electric power system measuring and controlling protective device, it is characterized in that: comprise input change-over circuit, the current switching control circuit being connected with described input change-over circuit, the timing control circuit and the output interface circuit that are connected with described current switching control circuit, described timing control circuit is also connected with described output interface circuit, described timing control circuit detects the output time of described output interface circuit, and control described current switching control circuit break-make according to output time, described current switching control circuit comprises resistance R 2, resistance R 6, field effect transistor Q1, resistance R 3 and voltage stabilizing didoe D1, after described resistance R 6 is in parallel with described field effect transistor Q1, connect with described resistance R 2 again, described resistance R 3 is connected with the G utmost point with the D utmost point of described field effect transistor Q1, described voltage stabilizing didoe D1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1.
2. the adapter circuit of a kind of electric power system measuring and controlling protective device as claimed in claim 1, it is characterized in that: described timing control circuit comprises capacitor C 2, switching tube U1, resistance R 4, resistance R 5, resistance R 7 and capacitor C 3, described resistance R 5, resistance R 7 and described capacitor C 3 link together and form RC timing circuit, described RC timing circuit is connected with described output interface circuit, described switching tube U1 is connected with the S utmost point with the G utmost point of described field effect transistor Q1, the control end of described switching tube U1 is connected with described RC timing circuit, described capacitor C 2 is in parallel with described switching tube U1, described resistance R 4 is connected in series with described capacitor C 3.
3. the adapter circuit of a kind of electric power system measuring and controlling protective device as claimed in claim 1, is characterized in that: described output interface circuit comprises resistance R 1 and relay J Q1, and described resistance R 1 is connected with the coil of described relay J Q1.
4. the adapter circuit of a kind of electric power system measuring and controlling protective device as claimed in claim 1, is characterized in that: described input change-over circuit comprises rectification circuit DB1 and capacitor C 1, and described capacitor C 1 is connected with the output of described rectification circuit DB1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059325.8A CN102545137B (en) | 2012-03-08 | 2012-03-08 | Adaptive circuit for monitoring and protecting device of electric power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059325.8A CN102545137B (en) | 2012-03-08 | 2012-03-08 | Adaptive circuit for monitoring and protecting device of electric power system |
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| Publication Number | Publication Date |
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| CN102545137A CN102545137A (en) | 2012-07-04 |
| CN102545137B true CN102545137B (en) | 2014-04-02 |
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| CN201210059325.8A Active CN102545137B (en) | 2012-03-08 | 2012-03-08 | Adaptive circuit for monitoring and protecting device of electric power system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941534A (en) * | 2006-09-15 | 2007-04-04 | 南京深科博业电力自动化有限公司 | Circuit-breaker operation interface module of relay protector for power system |
| CN201601482U (en) * | 2010-01-12 | 2010-10-06 | 中国石油化工集团公司 | High-voltage circuit breaker coil protective device |
| CN202455027U (en) * | 2012-03-08 | 2012-09-26 | 北京科锐配电自动化股份有限公司 | Adaptive circuit of electrical power system monitoring and controlling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005031833B4 (en) * | 2005-07-06 | 2017-01-05 | Phoenix Contact Gmbh & Co. Kg | Method and electronic power supply device for supplying power to a low-voltage load protected by a protective device |
-
2012
- 2012-03-08 CN CN201210059325.8A patent/CN102545137B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941534A (en) * | 2006-09-15 | 2007-04-04 | 南京深科博业电力自动化有限公司 | Circuit-breaker operation interface module of relay protector for power system |
| CN201601482U (en) * | 2010-01-12 | 2010-10-06 | 中国石油化工集团公司 | High-voltage circuit breaker coil protective device |
| CN202455027U (en) * | 2012-03-08 | 2012-09-26 | 北京科锐配电自动化股份有限公司 | Adaptive circuit of electrical power system monitoring and controlling device |
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| CN102545137A (en) | 2012-07-04 |
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Inventor after: Han Yuxi Inventor after: He Jianping Inventor after: Lin Zhongyi Inventor after: Gu Yinan Inventor after: Zhang Tao Inventor after: Ye Zubiao Inventor after: Zhang Bingsong Inventor before: Han Yuxi Inventor before: He Jianping Inventor before: Lin Zhongyi Inventor before: Gu Yinan Inventor before: Zhang Tao |
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Free format text: CORRECT: INVENTOR; FROM: HAN YUXI HE JIANPING LIN ZHONGYI GU YINAN ZHANG TAO TO: HAN YUXI HE JIANPING LIN ZHONGYI GU YINAN ZHANG TAO YE ZUBIAO ZHANG BINGSONG |
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