CN205051433U - Resistance cabinet intelligent control device - Google Patents
Resistance cabinet intelligent control device Download PDFInfo
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- CN205051433U CN205051433U CN201520511300.6U CN201520511300U CN205051433U CN 205051433 U CN205051433 U CN 205051433U CN 201520511300 U CN201520511300 U CN 201520511300U CN 205051433 U CN205051433 U CN 205051433U
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- measuring circuit
- resistor
- circuit
- controlling device
- information processing
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Abstract
The utility model relates to a resistance cabinet controlling means, in particular to resistance cabinet intelligent control device. Include: information monitoring mechanism, information processing mechanism, actuating mechanism, information feedback mechanism and power supply circuit, information monitoring mechanism includes CT current measurement circuit, resistance card temperature measuring circuit, environment humiture measuring circuit, information monitoring mechanism with information processing mechanism connects, actuating mechanism with control mechanism connects, information feedback mechanism with information processing mechanism connects. This resistance cabinet intelligent control device is that a section observes and controls the precision height, receives ambient temperature and electromagnetic interference to influence little, the stable resistance cabinet intelligent control device of observing and controlling.
Description
Technical field
The present invention relates to resistor box control device, particularly a kind of resistor box intelligent controlling device.
Background technology
In AC network, particularly adopt grounding through resistance increasingly extensive with the network of cable power supply.Transformer neutral point earthing resistance cabinet is the complete grounding apparatus comprising grounding transformer, can be installed in power plant auxiliary system, electric substation's electric power system, industrial and mining enterprises' distribution system, realize the system operation mode that these electrical networks adopt Neutral Grounding through Resistance in Electrical.
A phase ground connection in three-phase line, will have capacitance current to flow through short dot, when this electric current is less, does not generally do a lot of damage, allow a period of time that operates with failure for electric power system, to ensure the reliability of powering.But when electric power system is very large, when capacitance current is also large, when there is one-phase short-circuit current, due to reasons such as central point variations, system overvoltage can be caused.So after transformer central point connects resistance, fixed center point voltage can be forced, simultaneously because resistance is for superpotential damping action, fault overvoltage level can be reduced.So, when the capacitance current of electric power system is greater than 10A time, just should consider to arrange central point resistance.
Transformer neutral point earthing resistance cabinet is applicable to the occasion that system neutral adopts small resistor or middle grounding through resistance.Now, need trip when single phase ground fault appears in electrical network excision faulty line immediately.When single-phase earthing appears in electrical network, earth resistance provides additional current in resistance property to earth point, makes earth current be capacitance-resistance character, thus ensures that the overvoltage produced is no more than the phase voltage of 2.6 times.
In China 3 ~ 35kV electric power system, major part is isolated neutral system, and the supply power mode of this system easily produces arc grounding over-voltage and phase fault when single-phase-to-ground current is larger, causes great harm to power supply unit.Resistor box, in running, because the change of fault immediate current and temperature is very large, is necessary to monitor.Along with the quickening of Chinese Urbanization progress, the application of low resistance grounding mode is more and more extensive.A kind of trend that intelligent controller has become neutral-point grounding resistance cabinet now is installed, increasing user requires to install intelligent monitoring and controlling device additional in resistor box now, because if its temperature of neutral-point grounding resistance cabinet long-time running can raise, now preferably need fan and blower fan and carry out automatic temperature-control and monitor temperature humidity size of current etc. is detailed at any time information, thus the safe and stable operation of the system of guarantee.
Summary of the invention
The object of this invention is to provide a kind of Measure Precision high, by ambient temperature and the resistor box intelligent controlling device that electromagnetic interference influence is little, observing and controlling is stable.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of resistor box intelligent controlling device, comprise: information monitoring mechanism, information processing mechanism, actuator, information feed back mechanism and power circuit, described information monitoring mechanism comprises CT current measurement circuit, resistor disc temperature measuring circuit, ambient temperature and humidity measuring circuit, described information monitoring mechanism is connected with described information processing mechanism, described actuator is connected with described controlling organization, and described information feed back mechanism is connected with described information processing mechanism.
Further, described information treatment part divides and comprises LCD display, microcontroller and button.
Further, described actuator comprises heater relay, blower fan relay, grounding alarm relay, electrical resistance overheats alarm relay, resistance interruption alarm relay.
Further, described information feedback system is by RS485 communicating circuit.
Further, described ambient temperature and humidity measuring circuit adopts high-precision digital transducer as input signal.
Further, described resistor disc temperature measuring circuit can connect two kinds of temperature sensors: thermocouple sensor or infrared sensor or both use simultaneously, wherein infrared sensor converts 4-20mA signal to and is input to resistor disc temperature measuring circuit.
Further, described CT current measurement circuit, resistor disc temperature measuring circuit, ambient temperature and humidity measuring circuit are all connected with described information processing mechanism by signal selector.
Further, described CT current measurement circuit comprises four diodes, three resistance, three electric capacity, and wherein said three electric capacity, one of them resistance are arranged on ground path.
Further, described resistor disc temperature measuring equipment comprises two signal amplifiers, and described two signal amplifiers are connected to two different signal selectors.
The invention has the beneficial effects as follows: this resistor box intelligent controlling device be a Measure Precision high, by ambient temperature and the resistor box intelligent controlling device that electromagnetic interference influence is little, observing and controlling is stable.It take microcontroller as core, by measuring by the electric current of resistor disc and the temperature of resistor disc, according to preset alarm value, starting corresponding load and output of reporting to the police, thus can ensure that earth resistance cabinet system runs normally.
Accompanying drawing explanation
Fig. 1 is the structural representation of resistor box intelligent controlling device;
Wherein: 1-CT current measurement circuit, 2-resistor disc temperature measuring circuit, 3-ambient temperature and humidity measuring circuit, 4-LCD display, 5-microcontroller, 6-button, 7-RS485 communicating circuit, 8-heater relay, 9-blower fan relay, 10-grounding alarm relay, 11-temperature alarm relay, 12-breaking alarming relay
Embodiment
Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is done more specifically bright.
As shown in Figure 1, a kind of resistor box intelligent controlling device, comprise: information monitoring mechanism, information processing mechanism, actuator, information feed back mechanism and power circuit, described information monitoring mechanism comprises CT current measurement circuit 1, resistor disc temperature measuring circuit 2, ambient temperature and humidity measuring circuit 3, described information monitoring mechanism is connected with described information processing mechanism, described actuator is connected with described controlling organization, and described information feed back mechanism is connected with described information processing mechanism.
Further, described information treatment part divides and comprises LCD display 4, microcontroller 5 and button 6.
Further, described actuator comprises heater relay 8, blower fan relay 9, grounding alarm relay 10, electrical resistance overheats alarm relay 11, resistance interruption alarm relay 12.
Further, described information feedback system is by RS485 communicating circuit 7.
Further, described ambient temperature and humidity measuring circuit 3 adopts high-precision digital transducer as input signal.
Further, described resistor disc temperature measuring circuit 2 can connect two kinds of temperature sensors: thermocouple sensor or infrared sensor or both use simultaneously, wherein infrared sensor converts 4-20mA signal to and is input to resistor disc temperature measuring circuit.
Further, described CT current measurement circuit 1, resistor disc temperature measuring circuit 2, ambient temperature and humidity measuring circuit 3 are all connected with described information processing mechanism by signal selector.
Further, described CT current measurement circuit 1 comprises four diodes, three resistance, three electric capacity, and wherein said three electric capacity, one of them resistance are arranged on ground path.
Further, described resistor disc temperature measuring equipment 2 comprises two signal amplifiers, and described two signal amplifiers are connected to two different signal selectors.
The invention has the beneficial effects as follows: this resistor box intelligent controlling device be a Measure Precision high, by ambient temperature and the resistor box intelligent controlling device that electromagnetic interference influence is little, observing and controlling is stable.It take microcontroller as core, by measuring by the electric current of resistor disc and the temperature of resistor disc, according to preset alarm value, starting corresponding load and output of reporting to the police, thus can ensure that earth resistance cabinet system runs normally.
To one skilled in the art, by illustrating above and can being expressly understood specific embodiment very much.The present invention does not limit therewith, all according to technological thought of the present invention, and the difference change that technical scheme basis is done, all falls within protection scope of the present invention.
Claims (6)
1. a resistor box intelligent controlling device, it is characterized in that, comprise: information monitoring mechanism, information processing mechanism, actuator, information feed back mechanism and power circuit, described information monitoring mechanism comprises CT current measurement circuit (1), resistor disc temperature measuring circuit (2), ambient temperature and humidity measuring circuit (3), described information monitoring mechanism is connected with described information processing mechanism, described actuator is connected with controlling organization, and described information feed back mechanism is connected with described information processing mechanism.
2. resistor box intelligent controlling device according to claim 1, is characterized in that, described information feedback system is by RS485 communicating circuit (7).
3. resistor box intelligent controlling device according to claim 1, is characterized in that, described ambient temperature and humidity measuring circuit (3) adopts digital transducer as input signal.
4. resistor box intelligent controlling device according to claim 1, it is characterized in that, described resistor disc temperature measuring circuit (2) can connect two kinds of temperature sensors: thermocouple sensor or infrared sensor or both use simultaneously, wherein infrared sensor converts 4-20mA signal to and is input to resistor disc temperature measuring circuit.
5. resistor box intelligent controlling device according to claim 1, it is characterized in that, described CT current measurement circuit (1), resistor disc temperature measuring circuit (2), ambient temperature and humidity measuring circuit (3) are all connected with described information processing mechanism by signal selector.
6. resistor box intelligent controlling device according to claim 5, is characterized in that, described resistor disc temperature measuring equipment (2) comprises two signal amplifiers, and described two signal amplifiers are connected to two different signal selectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520511300.6U CN205051433U (en) | 2015-07-15 | 2015-07-15 | Resistance cabinet intelligent control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520511300.6U CN205051433U (en) | 2015-07-15 | 2015-07-15 | Resistance cabinet intelligent control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205051433U true CN205051433U (en) | 2016-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520511300.6U Expired - Fee Related CN205051433U (en) | 2015-07-15 | 2015-07-15 | Resistance cabinet intelligent control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205051433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817387A (en) * | 2017-11-29 | 2018-03-20 | 国网上海市电力公司 | A kind of resistor box intellectual monitoring protection device and its method |
-
2015
- 2015-07-15 CN CN201520511300.6U patent/CN205051433U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817387A (en) * | 2017-11-29 | 2018-03-20 | 国网上海市电力公司 | A kind of resistor box intellectual monitoring protection device and its method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210414 Address after: Room 801 and 802, no.6, East Suyuan Road, Suxian District, Chenzhou City, Hunan Province Patentee after: Guodian power Hunan Chenzhou Wind Power Development Co.,Ltd. Address before: 310012 2 / F, block B, unit 3, No. 16, xiyuanwu Road, Xihu District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU HONCEN TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20210715 |