CN114578163A - Low-voltage loop measurement and control terminal - Google Patents
Low-voltage loop measurement and control terminal Download PDFInfo
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- 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
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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
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
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- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
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Abstract
The application relates to a low-voltage loop measurement and control terminal, which comprises a detection unit, a communication unit, a control module and an output module; the detection unit is used for acquiring the power utilization state information of the low-voltage loop and sending the power utilization state information to the control module; the communication unit is used for receiving a remote protection instruction and sending the remote protection instruction to the control module; the control module is used for receiving the power utilization state information and carrying out operation analysis to generate an analysis result, and a protection mechanism is preset in the control module; and under the condition that the analysis result meets the protection mechanism and/or a remote protection instruction is received, the control module controls the output module to output a switch control instruction. The state of the low-voltage loop is monitored in real time, remote inquiry and control are realized, and the monitoring intellectualization of the low-voltage loop is realized.
Description
Technical Field
The application relates to the field of power grid monitoring, in particular to a low-voltage loop measurement and control terminal.
Background
The rising of wisdom power demand is because of traditional circuit breaker only is responsible for simple switch, and the function is also simple. With the upgrading of the power grid, the state of the circuit breaker and the power utilization state need to be monitored more intelligently. Under the huge market condition of present traditional low voltage circuit breaker holding capacity, newly-built and the return circuit monitoring demand of reforming transform is huge, so research and development a section can realize to current circuit breaker running state monitoring simultaneously to current power consumption return circuit electric parameter monitoring to satisfy the product of the thing networking demand of current wisdom electric power, have very actual realistic value.
Disclosure of Invention
In order to realize the intelligent monitoring to low pressure return circuit, this application provides a low pressure return circuit measurement and control terminal.
The application provides a low pressure return circuit measurement and control terminal adopts following technical scheme:
a low-voltage loop measurement and control terminal comprises a detection unit, a communication unit, a control module and an output module;
the detection unit is used for acquiring power utilization state information of the low-voltage loop and sending the power utilization state information to the control module, wherein the power utilization state information comprises electrical parameter information, switching value information, temperature information, power failure information and leakage current information;
the communication unit is used for receiving a remote protection instruction and sending the remote protection instruction to the control module;
the control module is used for receiving the power utilization state information and carrying out operation analysis to generate an analysis result, and a protection mechanism is preset in the control module;
and under the condition that the analysis result meets the protection mechanism and/or a remote protection instruction is received, the control module controls the output module to output a switch control instruction.
By adopting the technical scheme, on one hand, the local real-time monitoring of the state of the low-voltage loop is realized, so that when the current state of the low-voltage loop meets a protection mechanism (does not meet the power utilization requirement), a switch control instruction is output in time to cut off the low-voltage loop; on the other hand, personnel can realize controlling the output module to output a switch control instruction in a remote control mode so as to realize remotely cutting off the low-voltage loop.
Preferably, the device further comprises a storage module, wherein the storage module is used for storing data; a recording mechanism is preset in the control module;
and under the condition that the analysis result meets the recording mechanism, the control module controls the storage module to record the current analysis result.
Through adopting above-mentioned technical scheme, when the low pressure return circuit state appears unusually, in time take notes to supply the maintainer to look over.
Preferably, the system further comprises a clock module, wherein the clock module is used for acquiring the current time;
and under the condition that the analysis result meets the recording mechanism, the control module controls the storage module to record the current analysis result and the current moment.
By adopting the technical scheme, the abnormal time of the state of the low-voltage loop is recorded so as to be checked by maintenance personnel.
Preferably, the communication unit is used for receiving a remote query instruction, and the communication unit sends the remote query instruction to the control module;
the control module responds to the received remote query instruction to send power utilization state data to the communication unit, wherein the power utilization state data comprise one or more of power utilization state information, analysis results and data recorded by the storage module;
the communication unit outputs power consumption state data.
By adopting the technical scheme, remote query is realized.
Preferably, the system also comprises an operation module and a display module;
the operation module is used for responding to the operation of a user to send an operation signal to the control module;
the control module responds to the operation signal to send an information text to the display module, wherein the information text comprises power utilization state information;
and the display module receives and displays the information text.
By adopting the technical scheme, the power utilization state information is locally displayed for field personnel to check.
Preferably, the communication unit includes a wireless communication module and/or a wired communication module.
Preferably, in the case that the communication unit includes a wireless communication module, the wireless communication module includes an NB-IoT communication module and/or a Lora communication module;
in a case where the communication unit includes a wired communication module, the wired communication module includes a 485 communication module.
By adopting the technical scheme, RS485, Lora wireless networking, NB-IoT (Internet of things) and various communication interface selections are provided.
Preferably, the detection unit comprises an electrical parameter detection module, a temperature detection module, a power failure detection module and a leakage current detection module;
the electric parameter detection module is used for acquiring electric parameter information of the low-voltage loop;
the temperature detection module is used for acquiring temperature information of the low-voltage loop;
the power failure detection module is used for acquiring power failure information of the low-voltage loop;
the leakage current detection module is used for acquiring leakage current information of the low-voltage loop.
By adopting the technical scheme, the power utilization state information of the low-voltage loop can be acquired.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the monitoring of the running state of the existing circuit breaker and the electric parameters of the current power utilization loop are realized;
2. and remote inquiry and control are realized so as to meet the requirement of the Internet of things of intelligent power.
Drawings
Fig. 1 is a structural block diagram of a low-voltage loop measurement and control terminal.
Fig. 2 is a block diagram of the structure of the detection unit.
Fig. 3 is a wiring diagram of the electromagnetic relay.
Fig. 4 is a block diagram of a communication unit.
Fig. 5 is a schematic diagram of the over-limit process.
FIG. 6 is a schematic diagram of the lower bound process
Fig. 7 is a wiring diagram of an input module.
Fig. 8 is a schematic structural diagram of a low-voltage loop measurement and control terminal.
FIG. 9 is an interface of the "U/I" menu.
FIG. 10 is an interface for an "event" menu.
Description of the reference numerals: 1. a detection unit; 11. an electrical parameter detection module; 12. a temperature detection module; 13. a power failure detection module; 14. a leakage current detection module; 15. an input module; 2. a control module; 3. an output module; 4. a communication unit; 41. a wireless communication module; 42. a wired communication module; 5. a storage module; 6. a clock module; 7. an operation module; 8. and a display module.
Detailed Description
The present application is described in further detail below with reference to figures 1-10.
The embodiment of the application discloses a low-voltage loop measurement and control terminal.
Example 1
Referring to fig. 1, the low-voltage loop measurement and control terminal includes a detection unit 1, a control module 2 and an output module 3.
Referring to fig. 1 and 2, the detection unit 1 is configured to obtain power consumption state information of the low-voltage circuit, where the power consumption state information includes electrical parameter information, temperature information, power failure information, and leakage current information. The detection unit 1 comprises an electrical parameter detection module 11, a temperature detection module 12, a power failure detection module 13 and a leakage current detection module 14.
The electrical parameter detection module 11 is used for acquiring electrical parameter information of the low-voltage loop. In one embodiment, for three-phase ac power, the electrical parameter detection module 11 may adopt an RN7302 three-phase electrical parameter detection module 11, and the electrical parameter information includes phase voltage, line voltage, current, zero sequence current, frequency, voltage angle, current angle, fundamental voltage, fundamental current, harmonic voltage, harmonic current, power summation, active power, reactive power, apparent power, power factor, electric energy, and other parameters.
The temperature detection module 12 is used for acquiring temperature information of the low-pressure loop. The temperature detection module 12 may employ an NTC sensor or a PT100 sensor, and the temperature information includes a temperature value. The power failure detection module 13 is configured to obtain power failure information of the low-voltage circuit. The leakage current detection module 14 is configured to obtain leakage current information of the low-voltage loop.
Referring to fig. 1, a sensing unit 1 transmits power usage state information to a control module 2. The control module 2 receives the power utilization state information and carries out operation analysis to generate an analysis result; meanwhile, a protection mechanism is preset in the control module 2, and the control module 2 controls the output module 3 to output a switch control instruction under the condition that an analysis result meets the protection mechanism. The control module 2 can adopt an embedded single chip microcomputer.
In one embodiment, the protection mechanism is configured to determine that the temperature value is greater than an upper temperature protection preset value, the temperature value is less than a lower temperature protection preset value, the phase voltage value is greater than an upper phase voltage protection preset value, the phase voltage value is less than a lower phase voltage protection preset value, the current value is greater than an upper current protection preset value, and the like goes out of limit (goes out of upper limit or lower limit).
In one embodiment, referring to fig. 1 and 3, two electromagnetic relays are connected to the output module 3, and the terminal blocks are labeled DO1 (49, 50), DO2 (47, 48). Specifically, the output module 3 is connected with a coil of an electromagnetic relay, and a normally closed switch of the electromagnetic relay is connected with a low-voltage loop. When the output module 3 outputs a switch control instruction, the coil of the electromagnetic relay is electrified, and the normally closed switch of the electromagnetic relay is disconnected so as to cut off the current of the low-voltage loop; and, when the load current is large, an intermediate relay may be added.
Referring to fig. 1 and 4, the low-voltage loop measurement and control terminal further includes a communication unit 4. The communication unit 4 includes a wireless communication module 41 and/or a wired communication module 42. In the case where the communication unit 4 includes the wireless communication module 41, the wireless communication module 41 includes an NB-IoT communication module and/or a Lora communication module; in the case where the communication unit 4 includes the wired communication module 42, the wired communication module 42 includes a 485 communication module.
The communication unit 4 is used for receiving a remote protection instruction sent by a remote device, and the communication unit 4 sends the remote protection instruction to the control module 2. The remote device may be a server, a computer, or a mobile phone. The control module 2 responds to the remote protection command to control the output module 3 to output a switch control command.
The communication unit 4 is also used for receiving a remote control instruction sent by a remote device, and the communication unit 4 sends the remote control instruction to the control module 2. The control module 2 responds to the remote control command to control the output module 3 to output an engagement control command. Specifically, the output module 3 is connected with a coil of an electromagnetic relay, and a normally closed switch of the electromagnetic relay is connected with a low-voltage loop. When the output module 3 outputs the engagement control command, the coil of the electromagnetic relay is powered off, and the normally closed switch of the electromagnetic relay is closed to connect the low-voltage circuit.
In one embodiment, the communication unit 4 includes an NB-IoT communication module, a Lora communication module, and a 485 communication module.
And under the condition that the host is configured, all the low-voltage loop measurement and control terminals are used as slaves and are communicated with the host, and the host is communicated with the remote equipment.
Under the condition that no Lora host computer is configured, the current low-voltage loop measurement and control terminal can be used as a relay and is communicated with remote equipment, and other low-voltage loop measurement and control terminals can be communicated with the current low-voltage loop measurement and control terminal.
Under the condition that the NB-IoT host is not configured, the current low-voltage loop measurement and control terminal can be used as the host and can communicate with the remote equipment, and other low-voltage loop measurement and control terminals can communicate with the current low-voltage loop measurement and control terminal.
Meanwhile, the current low-voltage loop measurement and control terminal can be set as a slave machine, a relay machine or a master machine through panel control or through communication and control of upper computer software.
Referring to fig. 1, the low-voltage loop measurement and control terminal further includes a storage module 5 and a clock module 6. The storage module 5 is used for storing data. The clock module 6 is used for acquiring the current time.
The control module 2 is also preset with a recording mechanism. And, in case that the analysis result satisfies the recording mechanism, the control module 2 controls the storage module 5 to record the current analysis result and the current time as the event record.
In one embodiment, the recording mechanism is configured to determine an out-of-limit (upper or lower limit).
Specifically, the out-of-limit parameters can be set through a panel or through communication by upper computer software, and each group of parameters comprises the following contents:
1) the triggering mode is as follows: the higher/lower limit.
2) A monitoring subject, comprising: phase voltage, line voltage, phase current, frequency, total active power, total power factor, total active power real-time demand, voltage total harmonic distortion rate, current total harmonic distortion rate, voltage unbalance and current unbalance.
3) Upper/lower action limits: an action value and a return value of the out-of-limit trigger.
When the upper limit is exceeded, the monitoring object measured value exceeds the action upper limit value and exceeds the action, and when the measured value is smaller than the action lower limit value, the exceeding is returned;
and when the lower limit is exceeded, the monitoring object measurement value exceeds the action lower limit value, the action is out-of-limit, and when the measurement value is greater than the action upper limit value, the action is out-of-limit returned.
4) Action delay: the time of the out-of-limit delay action is detected.
The setting range of the action delay time is 0-9999 s.
5) And (4) returning and delaying: and delaying the return time after the out-of-limit return.
The setting range of the return delay time is 0-9999 s.
6) Triggering action: the result of the out-of-limit trigger.
All out-of-limit actions or returns will generate event records and may be set to trigger two outputs, the output action being the DO egress.
The trigger mode for the fixed value exceeding the limit can be set to an upper limit and a lower limit, and the logic for judging the upper limit and the lower limit is described as follows:
referring to fig. 5, the case of exceeding the upper limit is described, taking the triggering of the relay action beyond the limit as an example. Under the condition that the measured parameter exceeds the action upper limit and the duration time exceeds the action delay time, the relay is triggered to act in an out-of-limit mode; and when the measured parameter is smaller than the action lower limit and the duration time exceeds the return delay time, the relay returns.
Referring to fig. 6, the lower limit is exceeded, taking the triggering of the relay action as an example. When the measured parameter is lower than the action lower limit and the duration time exceeds the action delay time, the relay is triggered to act in an out-of-limit manner; and in the case that the measured parameter is higher than the action upper limit and the duration time exceeds the return delay time, returning the relay.
The upper limit of the operation in the process of going beyond the upper limit and the upper limit of the operation in the process of going beyond the lower limit are independent of each other, that is, the values of the upper limit and the lower limit are not equal; the lower limit of the motion in the process of going to the upper limit and the lower limit of the motion in the process of going to the lower limit are independent of each other, that is, the values of the two are not equal.
The power consumption state information further includes switching value information. Referring to fig. 2, the detection unit 1 further includes an input module 15, and the input module 15 is configured to obtain switching amount information of the low voltage circuit. In one embodiment, referring to fig. 7, the input module 15 is configured with four switching value inputs, terminals labeled DI1, DI2, DI3, DI4, COM, for detecting the state of the external contacts. Wherein, COM is a public end.
Meanwhile, the recording mechanism further comprises switching value information updating, such as: with DI1 switched from closed to open, record "DI 1 open"; in the case where DI1 switched from open to closed, "DI 1 closed" is recorded.
Referring to fig. 1, the low-voltage loop measurement and control terminal further includes an operation module 7 and a display module 8. The operation module 7 is used for responding to the operation of a user to send an operation signal to the control module 2. The control module 2 responds to the operation signal to send the information text to the display module 8. The display module 8 receives and displays the information text. The information text comprises power utilization state information, event records, a setting menu and the like.
In one embodiment, referring to fig. 8, the operation module 7 is a key and the display module 8 is a liquid crystal display.
For example, referring to fig. 8 and 9, after the low-voltage loop measurement and control terminal enters the "U/I" menu in response to the operation of the user on the key, the display module 8 may display electrical parameter information such as phase voltage, line voltage, current, etc. in a page mode.
Referring to fig. 8 and 10, after the low-voltage loop measurement and control terminal enters an "event" menu in response to a user's operation on a key, the display module 8 may display an event record.
Meanwhile, referring to fig. 1, the communication unit 4 is further configured to receive a remote query instruction sent by a remote device, and the communication unit 4 sends the remote query instruction to the control module 2. The control module 2 is responsive to the remote query instruction to transmit power usage status data to the communication unit 4, wherein the power usage status data includes one or more of power usage status information, analysis results and event records. The communication unit 4 transmits the power usage status data to the remote device.
Example 2
The difference between this embodiment and embodiment 1 is that an alarm mechanism is also preset in the control module 2.
The alarm mechanism comprises the following steps:
s10, in case the analysis result satisfies the protection mechanism, the control module 2 sends alarm data to the communication unit 4, and the communication unit 4 is configured to send the alarm data to the remote device. The alarm data includes one or more parameters in the power usage status information that trigger an out-of-limit determination.
Specifically, the out-of-limit judgment includes a lower limit judgment and an upper limit judgment.
And under the condition that the parameter is lower than the action lower limit and the duration time exceeds the action delay time, judging that the current parameter triggers lower limit judgment. And under the condition that the parameter is higher than the action upper limit and the duration time exceeds the action delay time, judging that the current parameter triggers the judgment of exceeding the upper limit.
And S20, recording a first numerical value of any parameter triggering the same out-of-limit judgment within a first preset time, wherein the alarm data further comprises the first numerical value.
Specifically, the first preset time may be set to 1H, 2H, 6H, or the like. After any parameter triggers out-of-limit judgment, the current moment is taken as the cut-off time, and the times of triggering the same out-of-limit judgment by the parameter within the first preset time before the cut-off time are recorded.
The definition of "trigger the same violation determination" will be described by taking the trigger violation determination as an example. If any parameter triggers the lower limit judgment at the current moment, the parameter is determined as triggering the same lower limit judgment when the parameter triggers the lower limit judgment once or for multiple times in a first preset time before the current moment. Triggering the lower limit-exceeding judgment of any parameter at the current moment, and determining that the parameter does not trigger the same out-of-limit judgment when one or more trigger upper limit-exceeding judgments exist but the trigger lower limit-exceeding judgments do not exist in the parameter within a first preset time before the current moment.
S30, if the first value corresponding to any parameter is greater than 1, the alarm data sent by the control module 2 further includes an update instruction, where the update instruction is used to control the remote device to delete the last alarm data corresponding to the current parameter.
And S40, recording a second numerical value of any parameter triggering different out-of-limit judgment within a second preset time, wherein the alarm data further comprises the second numerical value.
Specifically, the second preset time may be set to 1H, 2H, 6H, or the like. It should be noted that the second preset time may be different from or equal to the first preset time. And after any parameter triggers out-of-limit judgment, taking the current moment as the cut-off time, and recording a second numerical value of different out-of-limit judgment triggered by the parameter within a second preset time before the cut-off time.
The definition of "trigger different out-of-limit determination" will be described by taking the trigger out-of-limit determination as an example. And if any parameter triggers the lower limit judgment at the current moment, determining that the parameter triggers different out-of-limit judgments when the parameter triggers the upper limit judgment for one or more times in a second preset time before the current moment. And triggering lower limit exceeding judgment on any parameter at the current moment, and determining that the parameter does not trigger different limit exceeding judgment when the parameter has one or more times of triggering lower limit exceeding judgment and does not have triggering upper limit exceeding judgment in a first preset time before the current moment.
S50, if the second numerical value corresponding to any parameter is greater than 2, the alarm data sent by the control module 2 further includes a priority instruction, where the priority instruction is used to control the remote device to preferentially display the alarm data corresponding to the current parameter.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A low pressure return circuit measurement and control terminal which characterized in that: comprises a detection unit (1), a communication unit (4), a control module (2) and an output module (3);
the detection unit (1) is used for acquiring power utilization state information of the low-voltage loop, and the detection unit (1) sends the power utilization state information to the control module (2), wherein the power utilization state information comprises electric parameter information, switching value information, temperature information, power failure information and leakage current information;
the communication unit (4) is used for receiving a remote protection instruction, and the communication unit (4) sends the remote protection instruction to the control module (2);
the control module (2) is used for receiving the power utilization state information and performing operation analysis to generate an analysis result, and a protection mechanism is preset in the control module (2);
and under the condition that the analysis result meets a protection mechanism and/or a remote protection instruction is received, the control module (2) controls the output module (3) to output a switch control instruction.
2. The low-voltage loop measurement and control terminal of claim 1, wherein: the device also comprises a storage module (5), wherein the storage module (5) is used for storing data; a recording mechanism is preset in the control module (2);
and under the condition that the analysis result meets the recording mechanism, the control module (2) controls the storage module (5) to record the current analysis result.
3. The low-voltage loop measurement and control terminal of claim 2, wherein: the device also comprises a clock module (6), wherein the clock module (6) is used for acquiring the current moment;
and under the condition that the analysis result meets the recording mechanism, the control module (2) controls the storage module (5) to record the current analysis result and the current moment.
4. The low-voltage loop measurement and control terminal of claim 2 or 3, wherein: the communication unit (4) is used for receiving a remote query instruction, and the communication unit (4) sends the remote query instruction to the control module (2);
the control module (2) is used for responding to the received remote inquiry instruction to send power utilization state data to the communication unit (4), wherein the power utilization state data comprise one or more of power utilization state information, analysis results and data recorded by the storage module (5);
the communication unit (4) outputs power consumption state data.
5. The low-voltage loop measurement and control terminal of claim 1, wherein: the device also comprises an operation module (7) and a display module (8);
the operation module (7) is used for responding to the operation of a user to send an operation signal to the control module (2);
the control module (2) responds to the operation signal to send an information text to the display module (8), wherein the information text comprises power utilization state information;
the display module (8) receives and displays the information text.
6. The low-voltage loop measurement and control terminal of claim 1, wherein: the communication unit (4) comprises a wireless communication module (41) and/or a wired communication module (42).
7. The low-voltage loop measurement and control terminal of claim 6, wherein: in case the communication unit (4) comprises a wireless communication module (41), the wireless communication module (41) comprises an NB-IoT communication module and/or a Lora communication module;
in case the communication unit (4) comprises a wired communication module (42), the wired communication module (42) comprises a 485 communication module.
8. The low-voltage loop measurement and control terminal of claim 1, wherein: the detection unit (1) comprises an electrical parameter detection module (11), a temperature detection module (12), a power failure detection module (13) and a leakage current detection module (14);
the electrical parameter detection module (11) is used for acquiring electrical parameter information of the low-voltage loop;
the temperature detection module (12) is used for acquiring temperature information of the low-voltage loop;
the power failure detection module (13) is used for acquiring power failure information of the low-voltage loop;
the leakage current detection module (14) is used for acquiring leakage current information of the low-voltage loop.
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| CN202210213484.2A CN114578163A (en) | 2022-03-04 | 2022-03-04 | Low-voltage loop measurement and control terminal |
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