CN202854307U - Alternating current ingress into direct current power supply alarm device for transformer station - Google Patents
Alternating current ingress into direct current power supply alarm device for transformer station Download PDFInfo
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- CN202854307U CN202854307U CN201220534548.0U CN201220534548U CN202854307U CN 202854307 U CN202854307 U CN 202854307U CN 201220534548 U CN201220534548 U CN 201220534548U CN 202854307 U CN202854307 U CN 202854307U
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Abstract
The utility model relates to an alternating current ingress into direct current power supply alarm device for a transformer station. The alternating current ingress into direct current power supply alarm device for the transformer station comprises an acquisition circuit, a signal processing circuit, a display circuit, an alarm circuit, a clock circuit, a signal storage circuit and a button circuit and is characterized in that two input ends of the acquisition circuit are respectively connected with an anode and a cathode of a direct current system, an output end of the acquisition circuit is connected with a first input end of the signal processing circuit, the button circuit is connected with a second input end of the signal processing circuit, the clock circuit, the alarm circuit and the signal storage circuit are connected in parallel with a third input end of the signal processing circuit, and an output end of the signal processing circuit is connected with the display circuit. The alternating current ingress into direct current power supply alarm device for the transformer station is used for monitoring alternating current signals and direct power supply of the transformer station, when both are in electrical connection, an alarm signal is sent, and voltage waveform measurement and record of time when alternating current ingress happens are carried out for convenience in query and analysis of an accident.
Description
Technical field
The utility model relates to a kind of warning device, particularly relates to a kind of transformer station and scurries into the direct supply warning device with exchanging.
Background technology
Two kinds of power supplys of AC power and direct supply have been comprised in the power supply of Substation Station electricity consumption.AC power all is the power supply of ground connection, and direct supply is earth-free power supply.Because the existence of two kinds of power supplys, usually there is AC power that connection on electric has been connected with direct supply, AC power is not had considerable influence, and direct supply has just caused the state of ground connection, owing to construction and the misconnection of the hidden danger cause, circuit is installed, the apparatus insulated reason such as aging causes.AC signal has all power supplys, voltage transformer pt secondary side electric power loop, Current Transmit secondary side current loop usually in transformer station, the AC power after the DC/AC conversion output.Direct current is scurried in serious interchange, and voltage is scurried into greater than the AC signal more than the 100V, and direct-current grounding monitoring device can react usually for ground signalling reports to the police, and direct supply is scurried in not serious interchange does not have special warning device.And having serious interchange to scurry in the direct supply, the accident " Invest, Then Investigate " analysis that has is that the example that disturbed by power frequency is more.National grid was formulated " 18 counter arranging of safety of national grid " 5.1.1.18 and pointed out in March, 2012: the direct supply insulation monitoring and warning device of transformer station will have and exchanges the energy of scurrying into that direct supply is reported to the police and survey is cited sb. for meritorious service.
The utility model content
Technical problem to be solved in the utility model provides a kind of transformer station and scurries into the direct supply warning device with exchanging, comprise Acquisition Circuit, signal processing circuit, display circuit, warning circuit, clock circuit, signal is preserved circuit, key circuit, it is characterized in that, two input ends of described Acquisition Circuit join with the both positive and negative polarity of straight-flow system respectively, the output terminal of Acquisition Circuit and the first input end of signal processing circuit join, key circuit is connected on the second input end of signal processing circuit, clock circuit, warning circuit and signal are preserved circuit and are connected in the 3rd input end of signal processing circuit, and output terminal and the display circuit of signal processing circuit join.
Further, also comprise power circuit, be used for supplying above-mentioned each circuit as working power, the exportable 5V/2A of power circuit ,-5V/1A ,+12V/1A ,-four groups of power supplys of 12V/1A.
AC wave shape when further, described display circuit is scurried into direct supply for occuring to exchange shows.
For solving the problems of the technologies described above, the transformer station that the utility model provides scurries into the direct supply warning device and is used for monitoring substation AC signal and direct supply with exchanging, and just sends alerting signal and measuring voltage waveform and record is scurried into the time so that the accident query analysis when both are electrically connected.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 the utility model transformer station scurries into direct supply warning device synoptic diagram with exchanging;
Fig. 2 the utility model transformer station scurries into direct supply warning device sample circuit structural representation with exchanging.
The critical piece mark is as follows:
Acquisition Circuit 1 signal processing circuit 2
Straight-flow system 9
Embodiment
For the better utility model of expressing, now be described below by reference to the accompanying drawings:
As shown in Figure 1, scurry into direct supply warning device synoptic diagram for the utility model transformer station with exchanging.The utility model comprises Acquisition Circuit 1, signal processing circuit 2, display circuit 3, warning circuit 4, clock circuit 5, signal is preserved circuit 6, key circuit 7, power circuit 8, wherein two of Acquisition Circuit 1 input ends join with the both positive and negative polarity of straight-flow system 9 respectively, the input end a of the output terminal of Acquisition Circuit 1 and signal processing circuit 2 joins, output terminal y and the display circuit 3 of signal processing circuit 2 join, clock circuit 5, warning circuit 4 and signal are preserved circuit 6 and are connected in the c input end of signal processing circuit 2, key circuit 7 is connected on the b input end of signal processing circuit 2, wherein, when Acquisition Circuit 1 monitors the AC signal of cathode and anode directions of straight-flow system 9, this AC signal is delivered to signal processing circuit 2 carry out Treatment Analysis, signal processing circuit 2 is carried out according to the signal that sets by key circuit 7 with the user, when surpassing setting value, signal processing circuit 2 records according to the clock of clock circuit 5 and AC signal occurs scurries into the time of direct current and drive warning circuit 4 output alarm signals, it is for often opening, closed during warning when wherein warning circuit 4 is flat.The AC signal that display circuit 3 is sent here according to signal processing circuit 2 is carried out waveform and is shown.Power circuit 8 output AC/DC double-purpose electric sources, exportable 5V/2A ,-5V/1A ,+12V/1A ,-four groups of power supplys of 12V/1A, supply with respectively each circuit as working power.The user can read the contents such as the various information of scurrying into direct current, waveform, time occur to exchange for power grid accident is taken precautions against, crash analysis provides data by key circuit 7 operation.
Be illustrated in figure 2 as the utility model transformer station and scurry into direct current warning device sample circuit structural representation with exchanging.Formed by operational amplifier U1, coupling capacitance C1, input resistance R1, feedback resistance R2, resistance to earth R3, balance resistance R4, output resistance R5.Coupling capacitance C1 output terminal and operational amplifier U1 input end join; Coupling capacitance C1 is with feedback resistance R2 phase and connect; Coupling capacitance C1 is with resistance to earth R3 phase and connect, and another termination signal ground of resistance to earth R3, the other end of feedback resistance R2 and operational amplifier U1 output terminal are mutually and connect; Balance resistance R4 one end and operational amplifier U1 input end join, the other end and connect signal ground and join, and operational amplifier U1 output terminal and output resistance R5 input end join, and the described signal processing circuit 2 of the output terminal of output resistance R5 and Fig. 1 is joined.
Operational amplifier is designated as the master chip of sample circuit, coupling capacitance C1 and dc power anode or negative pole join, AC signal on the coupling capacitance C1 sampling dc power supply circuit, electric capacity has stopping direct current, logical AC characteristic, after the coupling of coupling capacitance C1 has been passed through in interchange, deliver to the input end of operational amplifier through input resistance R1, feedback resistance R2 guarantees the correctness of signal with the operational amplifier signal feedback.Balance resistance R4 is the compensating resistance of operational amplifier, delivers to output resistance R5 after operational amplifier U2 amplifies signal and carries out signal output.AC signal is delivered to signal processing resistance and is processed.
Above specific embodiment, the utility model is had been described in detail, whole utility model device is for providing the generation of transformer station's AC power and direct supply during electric joining, the survey record of on the direct supply interchange being reported to the police, realized exchanging the pre-alarm of signal of scurrying into direct current, be the crash analysis that direct supply is scurried in interchange, good foundation is provided.
More than by specific embodiment the utility model is had been described in detail, but these are not to consist of restriction of the present utility model.In the situation that does not break away from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection domain of the present utility model.
Claims (2)
1. a transformer station scurries into the direct supply warning device with exchanging, comprise Acquisition Circuit, signal processing circuit, display circuit, warning circuit, clock circuit, signal is preserved circuit, key circuit, it is characterized in that, two input ends of described Acquisition Circuit join with the both positive and negative polarity of straight-flow system respectively, the output terminal of Acquisition Circuit and the first input end of signal processing circuit join, key circuit is connected on the second input end of signal processing circuit, clock circuit, warning circuit and signal are preserved circuit and are connected in the 3rd input end of signal processing circuit, and output terminal and the display circuit of signal processing circuit join.
2. transformer station according to claim 1 scurries into the direct supply warning device with exchanging, and it is characterized in that, also comprises power circuit, is used for for above-mentioned each circuit as working power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220534548.0U CN202854307U (en) | 2012-09-24 | 2012-09-24 | Alternating current ingress into direct current power supply alarm device for transformer station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220534548.0U CN202854307U (en) | 2012-09-24 | 2012-09-24 | Alternating current ingress into direct current power supply alarm device for transformer station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854307U true CN202854307U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220534548.0U Expired - Lifetime CN202854307U (en) | 2012-09-24 | 2012-09-24 | Alternating current ingress into direct current power supply alarm device for transformer station |
Country Status (1)
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| CN (1) | CN202854307U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308866A (en) * | 2013-06-04 | 2013-09-18 | 安徽省电力公司阜阳供电公司 | Direct current insulation on-line monitoring device of transformer substation |
| CN103427485A (en) * | 2013-09-09 | 2013-12-04 | 国家电网公司 | Device used for detecting direct current power supply connected to alternating current power supply and direct current power supply ripples and used in transformer substation |
| CN103675710A (en) * | 2012-09-24 | 2014-03-26 | 温州市科星电子有限公司 | Alarm device for AC flowing into DC power supply for substation |
| CN103743988A (en) * | 2013-12-18 | 2014-04-23 | 国家电网公司 | AC fleeing early warning monitoring device of transformer station DC power supply system |
| CN104330681A (en) * | 2013-07-22 | 2015-02-04 | 艾默生网络能源有限公司 | Device for detecting AC entering DC bus in DC power system |
| CN105425068A (en) * | 2015-11-21 | 2016-03-23 | 国网宁夏电力公司宁东供电公司 | Substation direct-current bus alternating-current voltage serial-in monitoring device |
| CN106990306A (en) * | 2017-04-14 | 2017-07-28 | 国家电网公司 | A kind of transforming plant DC circuit test device |
| CN107741573A (en) * | 2017-10-24 | 2018-02-27 | 国网山西省电力公司电力科学研究院 | The bringing device and applying method of of ac are scurried into transforming plant DC power-supply system |
-
2012
- 2012-09-24 CN CN201220534548.0U patent/CN202854307U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675710A (en) * | 2012-09-24 | 2014-03-26 | 温州市科星电子有限公司 | Alarm device for AC flowing into DC power supply for substation |
| CN103308866A (en) * | 2013-06-04 | 2013-09-18 | 安徽省电力公司阜阳供电公司 | Direct current insulation on-line monitoring device of transformer substation |
| CN104330681A (en) * | 2013-07-22 | 2015-02-04 | 艾默生网络能源有限公司 | Device for detecting AC entering DC bus in DC power system |
| CN104330681B (en) * | 2013-07-22 | 2017-08-29 | 艾默生网络能源有限公司 | Dc bus scurries into the detection means of exchange in a kind of DC power system |
| CN103427485A (en) * | 2013-09-09 | 2013-12-04 | 国家电网公司 | Device used for detecting direct current power supply connected to alternating current power supply and direct current power supply ripples and used in transformer substation |
| CN103743988A (en) * | 2013-12-18 | 2014-04-23 | 国家电网公司 | AC fleeing early warning monitoring device of transformer station DC power supply system |
| CN105425068A (en) * | 2015-11-21 | 2016-03-23 | 国网宁夏电力公司宁东供电公司 | Substation direct-current bus alternating-current voltage serial-in monitoring device |
| CN106990306A (en) * | 2017-04-14 | 2017-07-28 | 国家电网公司 | A kind of transforming plant DC circuit test device |
| CN107741573A (en) * | 2017-10-24 | 2018-02-27 | 国网山西省电力公司电力科学研究院 | The bringing device and applying method of of ac are scurried into transforming plant DC power-supply system |
| CN107741573B (en) * | 2017-10-24 | 2019-12-13 | 国网山西省电力公司电力科学研究院 | Applying device and applying method for fleeing-in alternating current in direct-current power supply system of transformer substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |