CN113848472A - State monitoring device - Google Patents
State monitoring device Download PDFInfo
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- CN113848472A CN113848472A CN202111225864.XA CN202111225864A CN113848472A CN 113848472 A CN113848472 A CN 113848472A CN 202111225864 A CN202111225864 A CN 202111225864A CN 113848472 A CN113848472 A CN 113848472A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The embodiment of the invention discloses a state monitoring device, which is used for monitoring the states of an air switch and a pressure plate in a secondary circuit of a power system and comprises the following components: the device comprises a power module, an acquisition module and a processing module; the power supply module is electrically connected with the acquisition module and the processing module respectively; the acquisition module comprises an acquisition port and a switching value output end; the collecting ports comprise at least one first collecting port and at least one second collecting port, the at least one first collecting port is electrically connected with the pressing plate port of the at least one pressing plate in a one-to-one corresponding mode, and the at least one second collecting port is electrically connected with the switch port of the at least one air switch in a one-to-one corresponding mode; the signal input end of the processing module is electrically connected with the switching value output end; the processing module is used for determining the states of the pressing plates and the air switches according to the switching values of the pressing plates and the air switches, which are acquired by the acquisition module. The embodiment of the invention improves the accuracy of state monitoring and the working efficiency of operation and maintenance personnel by monitoring the states of the air switch and the pressing plate in time.
Description
Technical Field
The embodiment of the invention relates to the field of power systems, in particular to a state monitoring device.
Background
In a substation power system, a secondary device can generally monitor, regulate and protect a primary device, and a loop formed by the secondary device is called a key loop. The air switch state and the pressing plate state in the key loop of the power screen cabinet are monitored in time, so that secondary equipment can be protected better.
At present, collection of the air switch state and the pressure plate state in a key loop can only be carried out in a manual recording mode, the collection process is more complicated in the mode, and the time spent on collection is increased. Manual recording also has the possibility of recording errors, and the frequent occurrence of safety accidents is easily caused by the mistaken input and exit of the pressing plate caused by human factors. In addition, there is a lack of intelligent condition monitoring devices for the air switch and platen states in the critical circuits, so that circuits and systems that rely on the air switch and platen states cannot operate properly.
Disclosure of Invention
The embodiment of the invention provides a state monitoring device, which can normally operate a key loop and a system depending on the state of an air switch and the state of a pressure plate, and improves the monitoring accuracy and the working efficiency of operation and maintenance personnel.
The embodiment of the invention provides a state monitoring device, which is used for monitoring the states of an air switch and a pressure plate in a secondary circuit of an electric power system and comprises the following components: the device comprises a power module, an acquisition module and a processing module;
the power supply module is electrically connected with the acquisition module and the processing module respectively; the power supply module is used for respectively providing power supply voltage for the acquisition module and the processing module;
the acquisition module comprises an acquisition port and a switching value output end; the collecting ports comprise at least one first collecting port and at least one second collecting port, the at least one first collecting port is electrically connected with the pressing plate port of the at least one pressing plate in a one-to-one corresponding mode, and the at least one second collecting port is electrically connected with the switch port of the at least one air switch in a one-to-one corresponding mode; the acquisition module is used for acquiring the switching values of the pressing plates and the air switches;
the processing module comprises a signal input end; the signal input end is electrically connected with the switching value output end; the processing module is used for determining the states of the pressing plates and the air switches according to the switching values of the pressing plates and the air switches, which are acquired by the acquisition module.
According to the state monitoring device provided by the embodiment of the invention, the switching values of the pressing plate and the air switch are acquired through the acquisition module, and the switching values of the pressing plate and the air switch are processed and analyzed by the processing module to determine the states of the pressing plate and the air switch, so that the states of the pressing plate and the air switch can be known in time, the states of the air switch and the pressing plate in a key loop can be monitored in real time, compared with the condition that the states of the air switch and the pressing plate are recorded manually, the probability of misjudgment is reduced, manpower and time are saved, meanwhile, the occurrence of power grid safety accidents caused by human factors can be avoided, and the working efficiency and the personal safety of operation and maintenance personnel are further improved.
Drawings
Fig. 1 is a schematic structural diagram of a condition monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a state monitoring device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a condition monitoring device according to an embodiment of the present invention. Referring to fig. 1, a state monitoring device according to an embodiment of the present invention is adapted to monitor states of an air switch and a pressure plate in a secondary circuit of an electric power system, and includes: the device comprises a power module 10, an acquisition module 20 and a processing module 30; the power module 10 is electrically connected with the acquisition module 20 and the processing module 30 respectively; the power module 10 is used for respectively providing power supply voltage for the acquisition module 20 and the processing module 30; the acquisition module 20 comprises an acquisition port and a switching value output end; the collecting ports comprise at least one first collecting port and at least one second collecting port, the at least one first collecting port is electrically connected with the pressing plate port 8 of the at least one pressing plate in a one-to-one corresponding mode, and the at least one second collecting port is electrically connected with the switch port 9 of the at least one air switch in a one-to-one corresponding mode; the acquisition module 20 is used for acquiring the switching values of the pressure plates and the air switches; the processing module 30 comprises a signal input; the signal input end is electrically connected with the switching value output end; the processing module 30 is configured to determine states of the pressing plates and the air switches according to the switching values of the pressing plates and the air switches acquired by the acquisition module 20.
The secondary circuit of the power system is a circuit which is connected with the secondary equipment to monitor, control, regulate and protect the primary equipment. The air switch in the secondary circuit can be an air circuit breaker, and the air switch can be automatically switched off when the current in the secondary circuit exceeds the rated current so as to prevent the secondary circuit from being damaged due to overcurrent; the platen in the secondary loop is typically a protection platen, also referred to as a trip platen, which is a bridge for the protection device to connect to external wiring. And the operation condition of the secondary circuit can be further obtained by monitoring the states of the hollow open switch and the pressure plate in the secondary circuit.
Specifically, the power module 10 is adopted to respectively supply power to the acquisition module 20 and the processing module 30, so as to ensure that the acquisition module 20 and the processing module 30 can work normally; the switching values of the air switch and the pressure plate of the secondary circuit can be collected through the collection module 20; the processing module 30 processes and analyzes the switching values collected by the collecting module 20, so as to determine the states of the air switch and the pressure plate in the secondary circuit. The state of the pressure plate comprises an input state and an exit state, and the state of the air switch comprises a conducting state and a disconnecting state.
It is understood that the switching value refers to the acquisition and output of discontinuous signals, and the switching value in the secondary loop of the power system refers to the opening or closing of the loop, which is usually in the form of a high level or a low level. For example, when the pressing plate is in a switching-in state, the branch where the pressing plate is located can form a corresponding loop, the collected switching value of the pressing plate end can be a high level, and when the pressing plate is in a withdrawing state, the branch where the pressing plate is located is in a breaking state, and the collected switching value of the pressing plate end can be a high level; therefore, the current state of the pressing plate can be obtained according to the collected switching value of the pressing plate end. Similarly, when the air switch is in a conducting state, the branch where the air switch is located can form a corresponding loop, the collected switching value of the air switch end can be a high level, and when the air switch is in a disconnecting state, the branch where the air switch is located is in a disconnecting state, and the collected switching value of the air switch end can be a high level; therefore, the current state of the air switch can be obtained according to the collected switching value of the air switch end.
It should be noted that, in the embodiment of the present invention, the number of the first collecting port and the second collecting port in the collecting module 20 may be multiple, at this time, the collecting module 20 may collect the switching values of the multiple pressure plates and the multiple air switches, where the number of the first collecting port, the second collecting port, the pressure plate, and the air switch is not limited.
Optionally, fig. 2 is a schematic structural diagram of a state monitoring device according to an embodiment of the present invention. Referring to fig. 2, the power module 10 includes a power manager 11; the power supply manager 11 is electrically connected with the power supply 12, the acquisition module 20 and the processing module 30 respectively; the power manager 11 is configured to step down a power signal of the power supply 12 and convert the power signal into power supply voltages for the acquisition module 20 and the processing module 30, respectively. The power manager comprises a voltage reduction circuit, and the voltage reduction circuit can reduce the voltage of the power signal, so that the reduced voltage power signal conforms to the power supply voltage required by the acquisition module 20 and the processing module 30. The power signal provided by the power supply 12 may be a dc signal, which may have a voltage of 12V.
Optionally, a filtering unit 111 is disposed inside the power manager; the filtering unit 11 is configured to perform filtering processing on a power signal of the power supply 12.
Specifically, by arranging the filtering unit inside the power manager 11, the power signal provided by the power supply 12 can be filtered to prevent noise in the power signal from affecting the function of the power manager, so that the accuracy of the power supply voltage converted by the power manager can be improved.
Optionally, with reference to fig. 2, the collecting module outputs the switching values of the pressure plates and the air switches collected by the collecting port of the collecting module to the processing module 30, and the processing module 30 processes and analyzes the states of the pressure plates and the air switches collected by the collecting module 20; in addition, the processing module 30 is further configured to output status signals of the platens and the air switches according to the status of the platens and the air switches.
The state of the pressure plate comprises input and exit, and the state of the air switch comprises on and off. When the switching value of the pressing plate acquired by the acquisition module 20 is at a high level, the pressing plate is in an on state, and when the switching value of the pressing plate acquired by the acquisition module 20 is at a low level, the pressing plate is in an off state; correspondingly, when the switching value of the air switch collected by the collection module 20 is a high voltage, it indicates that the air switch is in a conducting state, and when the switching value of the air switch collected by the collection module 20 is a low level, it indicates that the air switch is in a disconnecting state, that is, the states of the pressure plate and the air switch are in a one-to-one correspondence relationship according to the high and low levels of the switching values of the pressure plate and the air switch.
Optionally, the acquisition port in the acquisition module 20 may acquire the switching value of the pressing plate and the air switch, and may also acquire the switching state of a door cabinet in the power cabinet or the state of the wiring electronics in the secondary circuit. Here, the specific type of the collected switching value is not limited.
With continued reference to fig. 2, optionally, the monitoring device further comprises a display module 50; the display module 50 is electrically connected with the status signal output end; and the display module is used for displaying according to the state signals of the pressure plates and the air switches.
It can be understood that the display module 50 is electrically connected to the status signal output terminal of the processing module 30, and a display screen is disposed in the display module 50, and the display screen can clearly display the status of each pressing plate and each air switch. The type of the display screen may be an LCD display screen or an OLED display screen, and the type of the display screen is not particularly limited herein.
Based on the above embodiment, optionally, with reference to fig. 2, the state monitoring device further includes an isolation module 40, where the isolation module 40 is electrically connected between the switching value output terminal and the signal input terminal, and the isolation module 40 is configured to prevent the high-voltage signal at the acquisition port of the acquisition module 20 from being transmitted to the processing module 30.
In particular, the isolation module 40 electrically connected between the acquisition module 20 and the processing module 30 can effectively prevent the transmission of high-voltage signals at the acquisition port of the acquisition module 20 into the processing module 30. After the high-voltage signal at the collection port of the collection module 20 is directly transmitted to the processing module 30 without passing through the isolation module 40, the processing module 30 may be damaged to different degrees, and the damage degree may be classified into mild degree, moderate degree and severe degree. No matter what degree of damage exists, the condition monitoring device can not work normally. The isolation module 30 can effectively prevent the transmission of high voltage signals, and better protect the processing module 30, so that the processing module 30 can stably and normally complete work. In the power system, voltages in the range of over 10KV but not over 220KV are divided into high voltage signals.
With continued reference to fig. 2, optionally, the isolation module 40 includes an opto-isolator 41; the optocoupler isolator 41 includes a light emitting diode and a phototransistor; the switching value output port comprises a first switching value output end and a second switching value output end; the signal input end comprises a first signal input end and a second signal input end; the anode of the light-emitting diode is electrically connected with the first switching value output end, and the cathode of the light-emitting diode is electrically connected with the second switching value output end; the first pole of the phototriode is electrically connected with the first signal input end, and the second pole of the phototriode is electrically connected with the second signal input end.
Specifically, the optical coupler isolator 41 transmits an electrical signal by using light as a transmission medium, and has a good isolation effect on the input and output electrical signals. The first switching value output end of the switching value output port in the collection module 20 is electrically connected to the anode of the light emitting diode, and the second switching value output end is electrically connected to the cathode of the light emitting diode, so that the electrical signal transmitted by the collection module 20 can be converted into an optical signal through the light emitting diode. The light signal is converted into the electrical signal again after passing through the phototriode, so that the process that the electrical signal is converted into the light signal and the light signal is converted into the electrical signal again is realized. The input and the output of the optical coupler isolator 41 are isolated from each other, and the electrical signal transmission has unidirectionality, so that the optical coupler isolator 41 has good electrical insulation capacity and anti-interference capacity.
Optionally, with continued reference to fig. 2, the processing module 30 further includes a single chip 31 and a communication circuit 32; the input end of the singlechip 31 is electrically connected with the signal input end; the output end of the singlechip 31 is in communication connection with the communication circuit 32; the single chip microcomputer 31 is configured to determine states of the pressure plates and the air switches according to the switching values of the pressure plates and the air switches acquired by the acquisition module 20, and output state signals of the pressure plates and the air switches through the communication circuit 32.
It can be understood that the signal input end of the processing module 30 is electrically connected to the input end of the single chip 31, and the output end of the single chip 31 is communicatively connected to the communication circuit 32. The type of the single chip microcomputer 31 can be STM32F103C8T6, the single chip microcomputer 31 can be added with a ucos-II system, the program runs stably, real-time acquisition and real-time data signal sending are achieved, and the acquisition and sending processes are free of jamming and time errors. Further, the single chip microcomputer 31 can acquire the switching values of the pressure plates and the air switches according to the acquisition module 20, determine the states of the pressure plates and the air switches in time, and transmit signals to the communication circuit 32 through a communication protocol. The communication protocol used by the communication circuit 32 may be any one of RS485, RS232, RS422, and TTL, and the type of the communication protocol is not limited herein.
According to the technical scheme of the embodiment of the invention, the power supply module is used for providing the required power supply voltage for the acquisition module and the processing module, so that the acquisition module and the processing module can be ensured to stably operate under the condition of sufficient voltage supply. The acquisition port in the acquisition module can respectively acquire the switching values of the pressure plate port and the air switch port in the secondary circuit; the collected switching values of the pressure plate and the air switch enter the isolation module, and the electric signals of the collection module are converted through the isolation module, so that the process of converting the electric signals into optical signals and then converting the optical signals into the electric signals is realized, and the high-voltage signals transmitted by the collection module are effectively prevented; the electric signal passing through the isolation module is transmitted to the processing module, collected by the singlechip and then sent to the communication circuit through a communication protocol; furthermore, the display module is connected with the state signal output end of the processing module, and the display module can display the state signals of the pressing plates and the air switches. According to the technical scheme of the embodiment of the invention, the air switch state and the pressure plate state in the key loop are monitored in real time through the power supply module, the acquisition module, the isolation module, the processing module and the display module, so that the probability of misjudgment caused by manually recording the air switch state and the pressure plate state is reduced, further the occurrence of power grid safety accidents caused by human factors is avoided, and the working efficiency of operation and maintenance personnel is further improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A condition monitoring device for monitoring the condition of an air switch and a pressure plate in a secondary circuit of an electrical power system, comprising: the device comprises a power module, an acquisition module and a processing module;
the power supply module is electrically connected with the acquisition module and the processing module respectively; the power supply module is used for respectively providing power supply voltage for the acquisition module and the processing module;
the acquisition module comprises an acquisition port and a switching value output end; the collecting ports comprise at least one first collecting port and at least one second collecting port, the at least one first collecting port is electrically connected with the pressing plate port of the at least one pressing plate in a one-to-one corresponding mode, and the at least one second collecting port is electrically connected with the switch port of the at least one air switch in a one-to-one corresponding mode; the acquisition module is used for acquiring the switching values of the pressing plates and the air switches;
the processing module comprises a signal input end; the signal input end is electrically connected with the switching value output end; the processing module is used for determining the states of the pressing plates and the air switches according to the switching values of the pressing plates and the air switches, which are acquired by the acquisition module.
2. The monitoring device of claim 1, further comprising: an isolation module;
the isolation module is electrically connected between the switching value output end and the signal input end and is used for preventing a high-voltage signal at the acquisition port of the acquisition module from being transmitted to the processing module.
3. The monitoring device of claim 2, wherein the isolation module comprises an opto-coupler isolator; the optical coupling isolator comprises a light emitting diode and a phototriode;
the switching value output port comprises a first switching value output end and a second switching value output end;
the signal input terminals comprise a first signal input terminal and a second signal input terminal;
the anode of the light-emitting diode is electrically connected with the first switching value output end, and the cathode of the light-emitting diode is electrically connected with the second switching value output end; and a first pole of the phototriode is electrically connected with the first signal input end, and a second pole of the phototriode is electrically connected with the second signal input end.
4. The monitoring device of claim 1, wherein the processing module further comprises a single chip microcomputer and a communication circuit;
the input end of the singlechip is electrically connected with the signal input end; the output end of the singlechip is in communication connection with the communication circuit; the single chip microcomputer is used for determining the states of the pressing plates and the air switches according to the switching values of the pressing plates and the air switches acquired by the acquisition module, and outputting state signals of the pressing plates and the air switches through the communication circuit.
5. The monitoring device of claim 4, wherein the single chip microcomputer is of the model STM32F103C8T 6.
6. The monitoring device of claim 4, wherein the communication protocol used by the communication circuit includes any one of RS485, RS232, RS422, TTL.
7. The monitoring device of claim 1, wherein the power module comprises a power manager;
the power supply manager is electrically connected with a power supply, the acquisition module and the processing module respectively; the power supply manager is used for converting the power supply signal of the power supply into the power supply voltage of the acquisition module and the processing module respectively after the voltage of the power supply signal is reduced.
8. The monitoring device of claim 7, wherein a filtering unit is disposed inside the power manager;
the filtering unit is used for filtering the power supply signal of the power supply.
9. The monitoring device of claim 7, wherein the power signal is a direct current signal; the voltage of the power supply signal is 12V.
10. The monitoring device of claim 1, further comprising: a display module;
the processing module also comprises a state signal output end; the processing module is further used for outputting state signals of the pressing plates and the air switches according to the states of the pressing plates and the air switches;
the display module is electrically connected with the state signal output end; the display module is used for displaying according to the state signals of the pressing plates and the air switches.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111225864.XA CN113848472A (en) | 2021-10-21 | 2021-10-21 | State monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111225864.XA CN113848472A (en) | 2021-10-21 | 2021-10-21 | State monitoring device |
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| CN113848472A true CN113848472A (en) | 2021-12-28 |
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