CN212514772U - Relay protection outlet relay coil on-line monitoring alarm device - Google Patents
Relay protection outlet relay coil on-line monitoring alarm device Download PDFInfo
- Publication number
- CN212514772U CN212514772U CN202020944548.2U CN202020944548U CN212514772U CN 212514772 U CN212514772 U CN 212514772U CN 202020944548 U CN202020944548 U CN 202020944548U CN 212514772 U CN212514772 U CN 212514772U
- Authority
- CN
- China
- Prior art keywords
- relay coil
- current
- current signal
- detection circuit
- outlet relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000004891 communication Methods 0.000 claims abstract description 32
- 230000003750 conditioning effect Effects 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses an on-line monitoring and alarming device for relay protection outlet relay coil, which comprises a voltage detection circuit, a current sensor, a current signal conditioning circuit, a current signal A/D conversion module, a microprocessor, an audible and visual alarm, a first wireless communication module, a server, a second wireless communication module and a terminal; the voltage detection circuit is connected in parallel with two ends of the outlet relay coil, and the current sensor is connected with the voltage detection circuit; the current sensor is connected with the current signal conditioning circuit, the current signal A/D conversion module and the microprocessor, and the microprocessor is connected with the audible and visual alarm; the microprocessor is connected with the server through the first wireless communication module, and the server is in communication connection with the terminal through the second wireless communication module. The utility model discloses can long-term on-line monitoring outlet relay coil state to report to the police in the discovery abnormity, in time remind the staff to overhaul the processing.
Description
Technical Field
The utility model relates to an electric power system relay protection technical field especially relates to a relay protection outlet relay coil on-line monitoring alarm device.
Background
Currently, in many power plants and substations, relay protection devices composed of conventional electromagnetic relays are still used. Generally, each protection system is provided with 1-2 intermediate relays as an outlet relay of relay protection. The method is a very important ring for ensuring that the corresponding main circuit can normally trip when a fault occurs. In this intermediate relay, the starting voltage coil generally has a large number of turns and a small wire diameter, and thus abnormality such as disconnection, high resistance state, short circuit, or the like of the outlet relay coil is likely to occur. This problem is particularly prominent for such an intermediate relay having an operating voltage of DC 220V, which is prone to the phenomenon of the voltage coil being broken. The failure of the coil of the outlet relay, the failure of the relay protection device due to high resistance state or short circuit and other abnormalities can cause accidents, so that the abnormality of the coil of the relay protection outlet relay must be found in time and eliminated in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a relay protection outlet relay coil on-line monitoring alarm device can long-term on-line monitoring outlet relay coil state to report to the police in discovery abnormity, in time remind the staff to overhaul the processing.
The utility model adopts the technical proposal that:
an on-line monitoring and alarming device for a relay protection outlet relay coil comprises a voltage detection circuit, a current sensor, a current signal conditioning circuit, a current signal A/D conversion module, a microprocessor, an audible and visual alarm, a first wireless communication module, a server, a second wireless communication module and a terminal, wherein the voltage detection circuit is used for detecting voltages at two ends of the outlet relay coil;
the voltage detection circuit is connected in parallel with two ends of the outlet relay coil, and the current signal input end of the current sensor is connected with the current signal output end of the voltage detection circuit; the current signal output end of the current sensor is connected with the input end of the current signal conditioning circuit, the output end of the current signal conditioning circuit is connected with the input end of the current signal A/D conversion module, the output end of the current signal A/D conversion module is connected with the input end of the microprocessor, and the first output end of the microprocessor is connected with the control input end of the audible and visual alarm; the second output end of the microprocessor is connected with the input end of the server through the first wireless communication module, and the server is in communication connection with the terminal through the second wireless communication module.
The voltage detection circuit comprises a rheostat, a first current limiting resistor and a microammeter; the first end of the rheostat is connected with the first end of the outlet relay coil, the second end of the rheostat is connected with the first end of the first current limiting resistor, the second end of the first current limiting resistor is connected with the first end of the microampere meter, and the second end of the microampere meter is connected with the second end of the outlet relay coil.
And a first diode and a second diode are connected in series between the first end of the rheostat and the first end of the outlet relay coil.
And the first end of the rheostat and the second end of the microampere meter are reversely connected with a voltage stabilizing diode.
And a second current-limiting resistor and a third current-limiting resistor are connected in series in a power supply loop of the voltage detection circuit.
And the power supply loop of the voltage detection circuit is also connected with an indicator lamp in series.
The indicator light is a light emitting diode.
The terminal is a mobile phone or a tablet.
The utility model discloses set up the voltage at voltage detection circuit monitoring outlet relay coil both ends, according to the resistance of voltage monitoring outlet relay coil, set up microprocessor, judge automatically whether the detection current in the voltage detection circuit is normal to judge whether there is the abnormality in outlet relay coil, when judging that outlet relay coil exists unusually, microprocessor control audible-visual annunciator reports to the police, reminds on-the-spot staff to look over, overhaul, avoid the staff can not discover the abnormal condition of outlet relay coil in time; and through microprocessor and server wireless communication, server and terminal wireless communication, send the unusual alarm information of outlet relay coil to the terminal to long-range warning staff realizes long-range warning, can guarantee timely effectual warning and warning, the staff of being convenient for in time discovers the abnormal state of outlet relay coil, carries out timely maintenance, guarantees power plant and transformer substation relay protection device's normal, is favorable to guaranteeing the safety in production of power plant and transformer substation.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a circuit diagram of the voltage detection circuit of the present invention;
RW, rheostat; r1, a first current limiting resistor; r2 and a second current limiting resistor; r3 and a third current limiting resistor; r4 and a fourth current limiting resistor; μ A, microammeter; d1, a first diode; d2, a second diode; d3, zener diode; d4, light emitting diode; BCJ, outlet relay coil.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the utility model discloses a relay protection outlet relay coil BCJ on-line monitoring alarm device, including the voltage detection circuit that is arranged in detecting outlet relay coil BCJ both ends voltage, the current sensor that is arranged in gathering the current in the voltage detection circuit, current signal conditioning circuit, current signal a/D conversion module, microprocessor, audible-visual annunciator, first wireless communication module, server, second wireless communication module and terminal; in specific implementation, the current in the voltage detection circuit needs to be strictly controlled below 0.6mA to ensure the normal and safe operation of the outlet relay, so the current signal A/D conversion module adopts a current signal high-precision A/D conversion module.
The voltage detection circuit is connected in parallel with two ends of the outlet relay coil BCJ, and the current signal input end of the current sensor is connected with the current signal output end of the voltage detection circuit; the current signal output end of the current sensor is connected with the input end of the current signal conditioning circuit, the output end of the current signal conditioning circuit is connected with the input end of the current signal A/D conversion module, the output end of the current signal A/D conversion module is connected with the input end of the microprocessor, and the first output end of the microprocessor is connected with the control input end of the audible and visual alarm; the second output end of the microprocessor is connected with the input end of the server through the first wireless communication module, and the server is in communication connection with the terminal through the second wireless communication module.
Preferably, the terminal is a mobile phone or a tablet.
The microprocessor can adopt 51 series single-chip microcomputer. The first wireless communication module and the second wireless communication module can adopt a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module or a WiFi module.
The wireless communication between the microprocessor and the server and the wireless communication between the server and the mobile phone are mature technologies in reality, and are widely applied to various monitoring systems or things, such as shared bicycles, and the like, so that the specific circuit connection relationship is not repeated.
The microprocessor controls the audible and visual alarm, which is a conventional technology for monitoring alarm systems and is not described herein.
As shown in fig. 2, a new circuit is added in the dashed line frame, and the voltage detection circuit includes a rheostat RW, a first current limiting resistor R1 and a microampere meter μ a; the first end of the rheostat RW is connected with the first end of the outlet relay coil BCJ, the second end of the rheostat RW is connected with the first end of the first current limiting resistor R1, the second end of the first current limiting resistor R1 is connected with the first end of the microampere meter mu A, and the second end of the microampere meter mu A is connected with the second end of the outlet relay coil BCJ.
A first diode D1 and a second diode D2 are connected in series between the first end of the varistor RW and the first end of the outlet relay coil BCJ. A fourth current limiting resistor R4 is connected in series between the second diode D2 and the outlet relay coil BCJ.
The combination of the varistor RW, the first current limiting resistor R1 and the microammeter mua serves to detect the dc resistance of the outlet relay coil BCJ. The voltage between the first terminal of the varistor RW and the second terminal of the microammeter mua is equal to the voltage between the positive pole of the first diode D1 and the second terminal of the outlet relay coil BCJ.
The voltage drop across the first diode D1, the second diode D2, and the fourth current limiting resistor R4 generally does not vary, and therefore the variation in the voltage between the first terminal of the varistor RW and the second terminal of the microampere μ a substantially reflects the variation in the outlet relay coil BCJ.
The rheostat RW is provided in order to adjust the precision of the microammeter μ a. When the rheostat RW is adjusted, the rheostat RW, the first current limiting resistor R1 and the resistance of the microammeter μ a do not change any more, and then the change of the outlet relay coil BCJ is basically reflected by the change of the current in the voltage detection circuit.
The first end of the rheostat RW and the second end of the microampere muA are reversely connected with a voltage stabilizing diode D3, so that the microampere muA is protected, and when the outlet relay coil BCJ is broken or in a high-resistance state, the reading of the microampere muA is guaranteed not to exceed a full scale value.
A second current-limiting resistor R2 and a third current-limiting resistor R3 are connected in series in a power supply loop of the voltage detection circuit, so that on one hand, detection current is provided for the voltage detection circuit, and on the other hand, the detection current is conveniently controlled below 0.6mA so as to ensure the normal and safe operation of the outlet relay.
And the power supply loop of the voltage detection circuit is also connected with an indicator lamp in series and used for monitoring whether the second current-limiting resistor R2 and the third current-limiting resistor R3 are disconnected or not. When the indicator light is on, the power supply loop of the voltage detection circuit is normal, otherwise, if the indicator light is off, the power supply loop of the voltage detection circuit is open-circuited, and a worker is reminded to overhaul.
In this embodiment, the indicator light is a light emitting diode D4.
The working principle of the utility model is as follows: the voltage detection circuit monitors the voltage between the outlet relay coils BCJ, so that whether the outlet relay coils BCJ are in open circuit, high resistance state, short circuit and other abnormalities is monitored. When the voltage detection circuit is adjusted, the detection current in the voltage detection circuit is basically fixed. And setting the normal detection current value as a normal current value and upper and lower threshold values of the normal current value.
The microammeter muA indicates the detection current in the voltage detection circuit, and when the reading of the microammeter muA is a normal current value and the value is between the upper threshold and the lower threshold of the current value, the state of the outlet relay coil BCJ is normal. When the reading of the microammeter mu A is smaller than the lower threshold of the current value, the voltage at two ends of the outlet relay coil BCJ is reduced, and the outlet relay coil BCJ is short-circuited. When the reading of the microammeter mu A is larger than the upper threshold value of the current value, the voltage of the two ends of the outlet relay coil BCJ is increased, and the outlet relay coil BCJ is in an open circuit or high-resistance state. The field worker can judge the BCJ state of the outlet relay coil by reading the reading of the microammeter mu A.
Meanwhile, the current sensor collects a detection current signal in the voltage detection circuit, transmits the collected detection current signal to the current signal conditioning circuit for conditioning, transmits the detection current signal to the current signal high-precision A/D converter through the current signal conditioning circuit, and converts a received current analog signal into a digital signal and transmits the digital signal to the microprocessor.
The microprocessor is preset with upper and lower thresholds of a normal current value, compares the received digital signal with the upper and lower thresholds of the set normal current value, controls the audible and visual alarm to give an alarm when the digital signal is greater than the upper threshold or smaller than the lower threshold, reminds field workers to check and overhaul, and avoids the situation that the workers cannot find the abnormal state of the outlet relay coil BCJ in time.
When the microprocessor processes and judges that the BCJ of the outlet relay coil is abnormal, the microprocessor sends the detection current value to the server through the first wireless communication module, and the server stores the detection current value through the second wireless communication module and sends alarm information and the detection current value to a terminal of a worker such as a mobile phone.
In the transformer substations in mountainous areas and unmanned areas, no worker stays in the site for a long time, and both the audible and visual alarm and the microampere meter muA are insufficient in timely alarming and reminding the worker. Present cell-phone does not leave the hand, will detect current value and alarm information and send to staff's cell-phone in, can guarantee in time to inform staff's hand, carry out timely effectual warning and warning, the staff of being convenient for in time discovers the abnormal condition of outlet relay coil BCJ, carries out timely maintenance, guarantees power plant and transformer substation relay protection device's normal, is favorable to guaranteeing the safety in production of power plant and transformer substation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a relay protection outlet relay coil on-line monitoring alarm device which characterized in that: the intelligent monitoring system comprises a voltage detection circuit for detecting the voltage at two ends of an outlet relay coil, a current sensor for collecting the current in the voltage detection circuit, a current signal conditioning circuit, a current signal A/D conversion module, a microprocessor, an audible and visual alarm, a first wireless communication module, a server, a second wireless communication module and a terminal;
the voltage detection circuit is connected in parallel with two ends of the outlet relay coil, and the current signal input end of the current sensor is connected with the current signal output end of the voltage detection circuit; the current signal output end of the current sensor is connected with the input end of the current signal conditioning circuit, the output end of the current signal conditioning circuit is connected with the input end of the current signal A/D conversion module, the output end of the current signal A/D conversion module is connected with the input end of the microprocessor, and the first output end of the microprocessor is connected with the control input end of the audible and visual alarm; the second output end of the microprocessor is connected with the input end of the server through the first wireless communication module, and the server is in communication connection with the terminal through the second wireless communication module.
2. The relay protection outlet relay coil on-line monitoring alarm device of claim 1, wherein: the voltage detection circuit comprises a rheostat, a first current limiting resistor and a microammeter; the first end of the rheostat is connected with the first end of the outlet relay coil, the second end of the rheostat is connected with the first end of the first current limiting resistor, the second end of the first current limiting resistor is connected with the first end of the microampere meter, and the second end of the microampere meter is connected with the second end of the outlet relay coil.
3. The relay protection outlet relay coil on-line monitoring alarm device of claim 2, wherein: and a first diode and a second diode are connected in series between the first end of the rheostat and the first end of the outlet relay coil.
4. The relay protection outlet relay coil on-line monitoring alarm device of claim 3, wherein: and the first end of the rheostat and the second end of the microampere meter are reversely connected with a voltage stabilizing diode.
5. The relay protection outlet relay coil online monitoring and alarming device of claim 4, wherein: and a second current-limiting resistor and a third current-limiting resistor are connected in series in a power supply loop of the voltage detection circuit.
6. The on-line monitoring and alarming device for relay protection outlet relay coil of claim 5, wherein: and the power supply loop of the voltage detection circuit is also connected with an indicator lamp in series.
7. The relay protection outlet relay coil on-line monitoring alarm device of claim 6, wherein: the indicator light is a light emitting diode.
8. The relay protection outlet relay coil on-line monitoring alarm device of claim 1, wherein: the terminal is a mobile phone or a tablet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944548.2U CN212514772U (en) | 2020-05-29 | 2020-05-29 | Relay protection outlet relay coil on-line monitoring alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944548.2U CN212514772U (en) | 2020-05-29 | 2020-05-29 | Relay protection outlet relay coil on-line monitoring alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212514772U true CN212514772U (en) | 2021-02-09 |
Family
ID=74391660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020944548.2U Active CN212514772U (en) | 2020-05-29 | 2020-05-29 | Relay protection outlet relay coil on-line monitoring alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212514772U (en) |
-
2020
- 2020-05-29 CN CN202020944548.2U patent/CN212514772U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204330025U (en) | Overground cable security of operation online monitoring system | |
| CN104658163A (en) | Electric energy metering terminal and electrical fire monitoring method | |
| CN204927711U (en) | Intelligent socket | |
| CN209676004U (en) | A kind of the wireless monitor detector and system of electric line safe operation | |
| CN107390054A (en) | A kind of surge protector intelligent online monitoring system | |
| CN117496680A (en) | Electric fire monitoring detector circuit | |
| CN212514772U (en) | Relay protection outlet relay coil on-line monitoring alarm device | |
| CN208059944U (en) | Substation's remote intelligent monitoring system based on PLC | |
| CN109980782A (en) | A kind of the wireless monitor detector and system of electric line safe operation | |
| CN201138365Y (en) | CVT on-line monitoring terminal | |
| CN218158290U (en) | Power cable leakage detection system | |
| CN210923930U (en) | SPD leakage current online intelligent monitoring device | |
| KR101856312B1 (en) | Artificial Intelligence Type Distribution Panel Board | |
| CN2758789Y (en) | Fault monitoring circuit for Hall current sensor | |
| CN111142059A (en) | Intelligent detection device and method for PT unit of outdoor ring main unit | |
| CN215870723U (en) | Power-off alarm device of intelligent power consumption protector | |
| CN210376499U (en) | High-voltage live display device capable of indicating induction voltage | |
| CN205911829U (en) | Miniature circuit breaker who possesses temperature measurement function | |
| WO2001024345A1 (en) | Supervision system | |
| CN211428985U (en) | Electricity isolation intelligent power-off standby power supply device | |
| CN210222971U (en) | Intelligent combined type electrical fire monitoring detector based on wireless communication | |
| CN107500069A (en) | Detection means, method and elevator warning system | |
| CN203119626U (en) | Portable direct-current system charger remote monitor | |
| CN112379303A (en) | Intelligent sensing system for grounding state of power transmission line | |
| CN210863991U (en) | Sensor for monitoring power supply of single-phase fire-fighting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |