CN117674391A - Modular system for low-voltage alternating-current multipath incoming line switching control - Google Patents
Modular system for low-voltage alternating-current multipath incoming line switching control Download PDFInfo
- Publication number
- CN117674391A CN117674391A CN202311650367.3A CN202311650367A CN117674391A CN 117674391 A CN117674391 A CN 117674391A CN 202311650367 A CN202311650367 A CN 202311650367A CN 117674391 A CN117674391 A CN 117674391A
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- wire
- wire inlet
- main
- 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.)
- Pending
Links
- 230000009471 action Effects 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims description 49
- 230000002159 abnormal effect Effects 0.000 claims description 43
- 230000005856 abnormality Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000012790 confirmation Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000007774 longterm Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000013480 data collection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a modularized system for low-voltage alternating-current multipath wire inlet switching control, and belongs to the technical field of low-voltage wire inlet switching. The invention solves the problems of difficult centralized control type acquisition and complicated wiring in the prior art, and performs centralized collection on the data of the main and standby power supply wire inlet ends and the multi-path wire inlet ends, and compares the collected multiple data with a fixed value; the PLC main controller issues a switching instruction to the distributed acquisition unit based on the comparison result, so as to control the distributed acquisition unit to execute switching action; the distributed acquisition unit controls the affiliated incoming line switching unit to execute switching action, so as to switch and control the multipath incoming lines; by means of the centralized and distributed data acquisition and the centralized control mode of the switching action by combining the PLC, the lead is not required to be connected to an external measurement and control cabinet for acquisition, and the accuracy of switching control is improved.
Description
Technical Field
The invention relates to the technical field of low-voltage incoming line switching, in particular to a modularized system for low-voltage alternating current multipath incoming line switching control.
Background
With the development of the modern power industry and the construction and transformation of a power grid, the electric young system is larger and larger in scale, the structure is more and more complex, the performance requirement is higher and higher, and the logic relationship of the automatic standby power input device is more and more complex; in a low-voltage distribution room, according to different power loads, the incoming line modes of a power supply can be diversified, and the method can be summarized as follows: a single-path incoming line and a multi-path incoming line; however, it is known that direct connection of different power supplies via wires can cause short circuits, and the hazard degree cannot be estimated.
However, the traditional centralized control needs to be collected by leading out to an external measurement and control cabinet according to the function of monitoring data, and the collected data are more in types, the collection process is complicated, the collection is difficult, the wiring is complicated, and the wiring is easy to make mistakes.
Therefore, the existing requirements are not met, and for this reason we propose a modular system for low-voltage ac multipath incoming line switching control.
Disclosure of Invention
The invention aims to provide a modularized system for switching control of low-voltage alternating current multipath incoming lines, which monitors main and standby power incoming line ends and multipath incoming line ends and compares the main and standby power incoming line ends and the multipath incoming line ends with fixed values; if any phase voltage value is smaller than a fixed value, judging that the current incoming line end has abnormal power supply; the method comprises the steps that a wire inlet switching module sends a switching-off command to a wire inlet end with abnormal power supply and sends a switching-on command to a wire inlet end of a standby power supply, so that power is supplied to the wire inlet end with abnormal power supply; if the wire inlet end with abnormal power supply is recovered to be normal, disconnecting the wire inlet end of the standby power supply, and recovering the original wire inlet end to supply power; the low-voltage alternating current multipath incoming line data acquisition is effectively realized, the incoming line is not required to be connected to an external measurement and control cabinet for acquisition, the accuracy of switching control is improved, and the problem in the background technology is solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: a modular system for low voltage ac multi-way line-in switching control, comprising:
the distributed acquisition unit is an integrated data acquisition terminal and is used for monitoring and switching real-time data of the main power supply wire inlet end, the standby power supply wire inlet end, the multipath wire inlet end and the standby power supply wire inlet end in real time;
the PLC main controller is connected with the distributed acquisition units based on the bus and is used for controlling the distributed acquisition units to execute switching actions;
and the incoming line switching unit is based on the switching action received by the distributed acquisition unit, so that the standby power supply incoming line end is automatically controlled to supply power to the main and standby power supply incoming line ends and the fault ends in the multipath incoming line ends.
Further, the distributed acquisition unit includes:
the main and standby voltage monitoring module monitors voltage signals of the main and standby power supply lead-in terminals in real time based on the voltage sensor, so that real-time voltage signals of the main and standby power supply lead-in terminals are obtained;
the multi-channel voltage monitoring module is used for monitoring voltage signals of the multi-channel wire inlet ends in real time based on the voltage sensors, so that real-time voltage signals of the multi-channel wire inlet ends are obtained;
the standby voltage monitoring module is used for monitoring the voltage signal of the standby power supply inlet wire end in real time based on the voltage sensor, so that the real-time voltage signal of the standby power supply inlet wire end is obtained;
the data conversion module is used for converting the main voltage signal and the standby voltage signal into numerical values through A/D based on the digital-to-analog converter, so that the converted bus voltage values and the multiple paths of voltage values are transmitted to the pre-judging unit to conduct line power supply state pre-judgment.
Further, the device also comprises a voltage pre-judging unit, which is used for comparing the real-time data of the main and standby power supply wire inlet ends and the multipath wire inlet ends with preset fixed values, so as to obtain the power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends, and transmitting the obtained power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends to a wire inlet switching unit for automatic switching control;
the voltage prejudging unit includes:
the fixed value preset module is used for presetting a fixed value which accords with the normal range of the voltage so as to be used as a reference for judging whether the main and standby voltages are in the normal range;
the constant value comparison module is used for comparing real-time voltage values of the main and standby power supply lead-in terminals and the multipath lead-in terminals with constant values respectively, so that a main and standby power supply lead-in terminal voltage comparison result and a multipath lead-in terminal voltage comparison result are obtained respectively;
the voltage pre-judging module is used for pre-judging the power supply states of the main and standby power supply wire ends and the multipath wire ends based on comparison results of the voltage values of the main and standby power supply wire ends and the multipath wire ends with fixed values respectively, and transmitting the pre-judging states to the wire inlet switching unit based on the wireless transmission module.
Further, the incoming line switching unit includes:
the state receiving module is used for receiving the power supply states of the main power supply inlet wire ends and the standby power supply inlet wire ends and the multipath inlet wire ends transmitted by the voltage prejudging unit and screening power supply lines which do not accord with the normal voltage range;
the wire inlet switching module is used for sending a switching-off instruction to a wire inlet end with abnormal power supply and sending a switching-on instruction to a wire inlet end of the standby power supply, so that normal power supply is provided for the wire inlet end with abnormal power supply.
Further, the main-standby voltage monitoring module includes:
the bus voltage monitoring module is used for monitoring bus voltage signals of the main and standby power supply wire inlet ends in real time, transmitting the bus voltage signals to the data conversion module for data conversion, and obtaining bus voltage values of the main and standby power supply wire inlet ends;
the three-phase voltage monitoring module is used for monitoring three-phase voltage signals of the main and standby power supply wire ends in real time, transmitting the three-phase voltage signals to the data conversion module for data conversion, and obtaining three-phase voltage values of the main and standby power supply wire ends.
Further, the fixed value preset module presets a fixed value which accords with a normal voltage range, and the fixed value preset range is as follows: -10% to +10% of the standard value of the phase voltage.
Further, the voltage prejudging module includes:
the delay confirming module is used for carrying out secondary voltage detection on the wire inlet end displaying the power supply abnormality in the comparison result and confirming whether the wire inlet end is in the power supply abnormality state for a long time;
and the state feedback module is used for feeding back the detection result of the delay confirmation module to the voltage pre-judging module and the cloud server, and pre-judging the power supply state of the phase inlet end through the voltage pre-judging module.
Further, the voltage pre-judging module pre-judges the power supply states of the main and standby power supply inlet terminals and the multipath inlet terminals, specifically:
based on the comparison result of the voltage value and the fixed value of the main and standby power supply inlet wire ends and the comparison result of the voltage value and the fixed value of the multipath inlet wire ends, if the voltage value of any one phase or multiple phases in the voltage value of the main and standby power supply inlet wire ends or the voltage value of the multipath inlet wire ends is smaller than the fixed value, the phase voltage is judged to be abnormal in power supply, the phase is controlled to be opened through the inlet wire switching unit, and then the standby power supply inlet wire ends are controlled to be closed, so that power is supplied to the phase voltage.
Further, after the delay confirmation module detects the secondary voltage of the wire inlet end with abnormal power supply, if the current wire inlet end is recovered to normal power supply, the current wire inlet end is judged to be a short-term fault, and the short-term fault is fed back to the cloud server for early warning; if the current lead-in terminal is still in abnormal power supply, judging that the current lead-in terminal is in long-term fault, and feeding back to the voltage pre-judging module and the cloud server for pre-judging and notifying.
Further, the standby power supply wire inlet end is controlled to supply power for the wire inlet end with abnormal power supply, and after the standby power supply wire inlet end is operated for a period of time, if the wire inlet end with abnormal power supply is recovered to be normal, the standby power supply wire inlet end is automatically disconnected, and the original wire inlet end is recovered to supply power, so that the system is recovered to the original operation mode.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the main and standby power supply wire inlet ends and the multipath wire inlet ends are monitored in real time, and the main and standby power supply wire inlet ends and the multipath wire inlet ends are respectively compared with fixed values; if the voltage value of any phase is smaller than a fixed value, judging that the current incoming line end has abnormal power supply; the method comprises the steps that a wire inlet switching module sends a switching-off command to a wire inlet end with abnormal power supply and sends a switching-on command to a wire inlet end of a standby power supply, so that normal power supply is provided for the wire inlet end with abnormal power supply; the wire inlet end of the standby power supply is monitored in real time so as to ensure that the power supply of the standby power supply is normal; after the standby power supply operates for a period of time, if the wire inlet end with abnormal power supply is recovered to be normal, the wire inlet end of the standby power supply is automatically disconnected, and the original wire inlet end is recovered to supply power, so that the system recovers the original operation mode; through the data collection and distribution type collection, the mode of centralized control of the switching action is combined with the PLC, the data collection and switching control of the low-voltage alternating current multipath incoming line are effectively achieved, the lead is not required to be connected to an external measurement and control cabinet for collection, the collection procedure is simplified, and the collection efficiency and the accuracy of the switching control are improved.
Drawings
FIG. 1 is a diagram of a modular system for low voltage AC multi-way line switching control in accordance with the present invention;
FIG. 2 is a flow chart of a low voltage AC multi-path incoming line switching control method of the invention;
FIG. 3 is a schematic diagram of a main operation state of a human-machine interface according to the present invention;
FIG. 4 is a three-way incoming core control topology of the present invention;
FIG. 5 is a diagram illustrating a user login status of a human-machine interface according to the present invention;
FIG. 6 is a schematic diagram of a human-machine interface mutual projection system according to the present invention;
FIG. 7 is a schematic diagram of a human-machine interface threshold setting according to the present invention;
FIG. 8 is a diagram illustrating a background communication setup of a human-machine interface according to the present invention;
FIG. 9 is a schematic diagram of a time setting of a human-machine interface system according to the present invention;
FIG. 10 is a diagram of a real-time alarm message for a human-machine interface according to the present invention;
FIG. 11 is a diagram of a human-machine interface history alert message according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the technical problems that the existing centralized control needs to be acquired by respectively leading out to an external measurement and control cabinet according to the function of monitoring data, the acquisition of data types is more, the acquisition process is complicated, the acquisition is difficult, the wiring is complicated, and the wiring is easy to make mistakes, please refer to fig. 1-11, the embodiment provides the following technical scheme:
a modular system for low voltage ac multi-way line-in switching control, comprising:
the distributed acquisition unit is an integrated data acquisition terminal and is used for monitoring and switching real-time data of the main power supply wire inlet end, the standby power supply wire inlet end, the multipath wire inlet end and the standby power supply wire inlet end in real time; specifically, the voltage signals of the main and standby power supply wire inlets and the multipath wire inlets are monitored in real time, so that the real-time voltage signals of the main and standby power supply wire inlets and the multipath wire inlets are obtained; and converting the monitored real-time voltage signal through a digital-to-analog converter, thereby obtaining a corresponding voltage value, and transmitting the converted voltage value to a voltage pre-judging unit for pre-judging.
The PLC main controller is connected with the distributed acquisition units based on the bus and is used for controlling the distributed acquisition units to execute switching actions;
the incoming line switching unit is based on the switching action received by the distributed acquisition unit, so that the standby power incoming line end is controlled to supply power to the main and standby power incoming line ends and the fault ends in the multipath incoming line ends; specifically, a closing instruction is sent to the wire inlet end of the standby power supply through the wire inlet switching unit, and a switching-on instruction is sent to the wire inlet end with abnormal power supply, so that power support is provided for the wire inlet end with abnormal power supply through the standby power supply, the normal operation of the phase voltage is ensured, the short circuit is prevented, and the defect that the modularized system with low-voltage alternating current multipath wire inlet switching control cannot normally operate is overcome.
The working principle of the above matters is as follows: the main and standby power supply wire inlet ends and the multipath wire inlet ends are monitored in real time, and the main and standby power supply wire inlet ends and the multipath wire inlet ends are respectively compared with fixed values; if the voltage value of any phase is smaller than a fixed value, judging that the current incoming line end has abnormal power supply; the method comprises the steps that a wire inlet switching module sends a switching-off command to a wire inlet end with abnormal power supply and sends a switching-on command to a wire inlet end of a standby power supply, so that normal power supply is provided for the wire inlet end with abnormal power supply; the wire inlet end of the standby power supply is monitored in real time so as to ensure that the power supply of the standby power supply is normal; after the standby power supply operates for a period of time, if the wire inlet end with abnormal power supply is recovered to be normal, the wire inlet end of the standby power supply is automatically disconnected, and the original wire inlet end is recovered to supply power, so that the system recovers the original operation mode; by the method, data acquisition and switching control of the low-voltage alternating current multipath incoming lines are effectively achieved, the incoming lines are not required to be connected to an external measurement and control cabinet for acquisition, the acquisition procedure is simplified, and the acquisition efficiency and the switching control accuracy are improved.
The distributed acquisition unit comprises:
the main and standby voltage monitoring module monitors voltage signals of the main and standby power supply lead-in terminals in real time based on the voltage sensor, so that real-time voltage signals of the main and standby power supply lead-in terminals are obtained; specifically, the voltage of the inlet end of the main power supply and the voltage of the inlet end of the standby power supply are monitored in real time through the main voltage monitoring module, so that the understanding of the power supply state of the main power supply and the standby power supply is enhanced; if the power supply abnormality is caused by the sudden fault of the main power supply and the standby power supply, switching control can be timely performed based on the monitored voltage signals, so that the power supply is performed to the main power supply and the standby power supply through the standby power supply, and the normal operation of the system is ensured.
The multi-channel voltage monitoring module is used for monitoring voltage signals of the multi-channel wire inlet ends in real time based on the voltage sensors, so that real-time voltage signals of the multi-channel wire inlet ends are obtained; specifically, the voltages of the multiple wire inlet ends are monitored in real time through the multiple voltage monitoring modules, so that the power supply state of the multiple wire inlet ends is better understood; if the power supply abnormality is caused by the sudden fault of the multipath wire inlet end, the switching control can be timely carried out based on the monitored voltage signals, so that power is supplied to the multipath wire inlet end through the standby power supply, and the normal operation of the system is ensured.
The standby voltage monitoring module is used for monitoring the voltage signal of the standby power supply inlet wire end in real time based on the voltage sensor, so that the real-time voltage signal of the standby power supply inlet wire end is obtained; specifically, the voltage of the standby power supply inlet wire end is monitored in real time through the standby voltage monitoring module, so that the understanding of the power supply state of the standby power supply is enhanced, and the standby power supply inlet wire end can be ensured to normally supply power for the main power supply or the standby power supply or the multipath power supplies.
The data conversion module is used for converting the main voltage signal and the standby voltage signal into numerical values through A/D based on the digital-to-analog converter, so that the converted bus voltage values and the multiple paths of voltage values are transmitted to the pre-judging unit to conduct line power supply state pre-judgment.
Further comprises: the voltage pre-judging unit is used for comparing the real-time data of the main and standby power supply wire inlet ends and the multipath wire inlet ends with preset fixed values, so as to obtain the power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends, and transmitting the obtained power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends to the wire inlet switching unit for switching control; specifically, the monitored voltage values of the main power supply wire inlet end and the standby power supply wire inlet end and the voltage values of the multipath wire inlet ends are compared with preset fixed values, and power supply pre-judgment is carried out on the relevant wire inlet ends based on the comparison result; if the voltage value of any one phase of the main and standby power supply lead-in end and the multipath lead-in end is smaller than a fixed value, judging a lead-in end with abnormal power supply, and carrying out switching treatment on a transmission lead-in switching unit of the abnormal lead-in end so as to ensure the normal operation of a modularized system for switching control of the low-voltage alternating current multipath lead-in.
The voltage prejudging unit includes:
the fixed value preset module is used for presetting a fixed value which accords with the normal range of the voltage so as to be used as a reference for judging whether the main and standby voltages are in the normal range; wherein, the preset range of the fixed value is: -10% to +10% of the phase voltage standard value; in one embodiment, such as: the phase voltage standard value is: 380V, a fixed value is preset by a fixed value preset module as follows: 342V-418V, thereby being used as a reference for judging whether the main and standby voltages and the multi-path voltages are in a normal state.
The constant value comparison module is used for comparing real-time voltage values of the main and standby power supply lead-in terminals and the multipath lead-in terminals with constant values respectively, so that a main and standby power supply lead-in terminal voltage comparison result and a multipath lead-in terminal voltage comparison result are obtained respectively;
the voltage pre-judging module is used for pre-judging the power supply states of the main and standby power supply wire ends and the multipath wire ends based on comparison results of the voltage values of the main and standby power supply wire ends and the multipath wire ends with fixed values respectively, and transmitting the pre-judging states to the wire inlet switching unit based on the wireless transmission module; the above embodiments are followed, for example: the preset value is: 342V-418V, if the main and standby voltage monitoring modules and the multi-path voltage monitoring module monitor that the real-time voltage value is not lower than 342V-418V, judging that the current system is normal in operation; if the main-standby voltage monitoring module and the multi-path voltage monitoring module monitor that the voltage value of any one phase of the main-standby voltage and the multi-path voltage is lower than 342V, judging that the voltage of the phase wire inlet end is in an abnormal state; such as: the main-standby voltage monitoring module monitors that the main-standby voltage value is: 340V,340V is lower than the fixed value 342V-418V, then judge that the current main and standby power is in the power supply abnormality, and upload this signal to the inlet wire switching unit and carry out the switching processing, in order to ensure that the system can normally operate.
The inlet wire switching unit includes:
the state receiving module is used for receiving the power supply states of the main power supply inlet wire ends and the standby power supply inlet wire ends and the multipath inlet wire ends transmitted by the voltage prejudging unit and screening power supply lines which do not accord with the normal voltage range; specifically, the received voltage data is stored and arranged, the voltages in the fixed value range are stored in sequence, and the voltages lower than the voltage in the fixed value range and the corresponding wire inlet ends are sent to the wire inlet switching module for switching, so that a standby power supply is provided for the fault wire inlet ends.
The wire inlet switching module is used for sending a switching-off instruction to a wire inlet end with abnormal power supply and sending a switching-on instruction to a wire inlet end of the standby power supply, so that normal power supply is provided for the wire inlet end with abnormal power supply; the above embodiments are followed, for example: the main-standby voltage monitoring module monitors that the main-standby voltage value is: 340V, if the current main and standby power supplies are in the power supply abnormality, the current main and standby power supplies are judged to be in the power supply abnormality; at the moment, the incoming line end of the main and standby power supply is switched off through the incoming line switching module, the standby power supply is controlled to switch on, and the standby power supply is used for replacing the main and standby power supply to supply power, so that the normal operation of the system is ensured; after the standby power supply operates for a period of time, the main and standby power supply lead-in ends are restored to be normal, the standby power supply lead-in ends are automatically disconnected, and the main and standby power supply lead-in ends are restored to supply power, so that the system is restored to the original operation mode.
The main and standby voltage monitoring module comprises:
the bus voltage monitoring module is used for monitoring bus voltage signals of the main and standby power supply wire inlet ends in real time, transmitting the bus voltage signals to the data conversion module for data conversion, and obtaining bus voltage values of the main and standby power supply wire inlet ends;
the three-phase voltage monitoring module is used for monitoring three-phase voltage signals of the main and standby power supply wire ends in real time, transmitting the three-phase voltage signals to the data conversion module for data conversion, and obtaining three-phase voltage values of the main and standby power supply wire ends.
The voltage prejudging module comprises:
the delay confirming module is used for carrying out secondary voltage detection on the wire inlet end displaying the power supply abnormality in the comparison result and confirming whether the wire inlet end is in the power supply abnormality state for a long time;
the state feedback module is used for feeding back the detection result of the delay confirmation module to the voltage pre-judging module and the cloud server, and pre-judging the power supply state of the phase inlet end through the voltage pre-judging module; the above embodiments are followed, for example: the main-standby voltage monitoring module monitors that the main-standby voltage value is: 340V, if the current main and standby power supplies are in the power supply abnormality, the current main and standby power supplies are judged to be in the power supply abnormality; and (3) carrying out secondary monitoring on the terminal voltage after 1 minute by using the delay confirmation module, and if the current monitored main and standby voltage values are as follows: 380V, judging that the current main and standby power supplies are in short-term fault and have potential fault risks when the current main and standby power supplies are restored to be normal, and transmitting the signal to a cloud server for early warning so as to pay attention to the power supply state of the main and standby power supplies at any time; if the secondary monitoring shows that the current monitored main and standby voltage values are still as follows: 340V, if the current main and standby power supplies are in the power supply abnormality, the current main and standby power supplies are judged to be in the power supply abnormality; and then improve the precision of voltage monitoring, prevent error.
The voltage prejudging module prejudges the power supply states of the main and standby power supply lead-in terminals and the multipath lead-in terminals, and specifically comprises the following steps:
based on the comparison result of the voltage value and the fixed value of the main and standby power supply inlet wire ends and the comparison result of the voltage value and the fixed value of the multipath inlet wire ends, if the voltage value of any one phase or multiple phases in the voltage value of the main and standby power supply inlet wire ends or the voltage value of the multipath inlet wire ends is smaller than the fixed value, the phase voltage is judged to be abnormal in power supply, the phase is controlled to be opened through the inlet wire switching unit, and then the standby power supply inlet wire ends are controlled to be closed, so that power is supplied to the phase voltage.
After the delay confirmation module detects the secondary voltage of the wire inlet end with abnormal power supply, if the current wire inlet end is recovered to normally supply power, judging that the current wire inlet end is in short-term fault; if the current wire inlet end is still in abnormal power supply, judging that the current wire inlet end is in long-term fault, and feeding back to a voltage pre-judging module for pre-judging and notifying; the standby power supply wire inlet is controlled to supply power for the wire inlet with abnormal power supply, and after the standby power supply wire inlet is operated for a period of time, if the wire inlet with abnormal power supply is recovered to be normal, the standby power supply wire inlet is automatically disconnected, and the original wire inlet is recovered to supply power, so that the system is recovered to the original operation mode.
In a preferred embodiment, such as: the embodiment is the field operation condition of five circuit breakers of three-way incoming line;
as can be seen in connection with fig. 3: the figure is a schematic diagram of a main interface of a three-way incoming line man-machine, and specifically comprises the following steps: the upper left corner of the main interface is a version number, date and running time display frame, and the upper right corner is a system running state display frame, so that system abnormality and system normal are displayed.
The middle part is a system simulation diagram, and displays the 1# incoming line, the 2# incoming line, the 0# incoming line, the bus voltage, the current data, five switch position states, an alternating current feeder cabinet and an expansion screen opening button.
The following display frames are provided with:
the "mute" button is: when the system is abnormal, the buzzer of the touch screen sounds, and the buzzer can be stopped by clicking the silencing button;
the alarm information button is: opening an alarm information interface;
the "home" button is: returning to the main interface;
the "system setup" button is: opening a system setting page;
the "user login" button is: after the user login password is input, the user is authorized to perform system setting.
| Name of the name | Description of the invention |
| 1L1,1L2,1L3 | Line incoming 1-way three-phase alternating current voltage |
| 2L1,2L2,2L3 | Line incoming 2-way three-phase alternating current voltage |
| 3L1,3L2,3L3 | Three-phase AC voltage of incoming line 3-way |
| 2TAa,2TAb,2TAc | Line incoming 1-way three-phase alternating current |
| 4TAa,4TAb,4TAc | Incoming line 2-way three-phase alternating current |
| 6TAa,6TAb,6TAc | Incoming line 3-way three-phase alternating current |
| L11,L12,L13 | Bus one-way three-phase voltage |
| L21,L22,L23 | Bus two-way three-phase voltage |
| L31,L32,L33 | Bus three-way three-phase voltage |
| 1QF,2QF,3QF,4QF,5QF | Current system switch operating state feedback |
TABLE 1
As can be seen in table 1, fig. 3 to fig. 4:
when the scheme is operating normally: station 1 supplies power to the bus of section I by changing a 1QF switch; station 2 supplies power to I I bus sections by changing 2QF switch-on; station 0 uses and becomes 3QF closing hot backup; the No. 1 contact switch 4QF is opened; no. 2 tie switch 5QF split gate.
Action conditions: (1) the change-over switches SA1-SA5 select 'automatic', and the incoming line power supplies 1, 2 and 3 are normal; (2) the monitoring screen displays a three-wire-in mode.
Self-casting function: when the variable incoming line for the station No. 1 is abnormal, the variable incoming line for the station No. 0 is normal, and the 1QF is combined and the 4QF is separated; the automatic switching device firstly breaks the 1QF station, and then closes the 1 contact switch 4QF;
when the variable incoming line for the station No. 2 is abnormal, the variable incoming line for the station No. 0 is normal, and the 2QF is combined and the 5QF is separated; the automatic switching device firstly breaks the gate of the station No. 2 to change 2QF, and then closes the gate of the station No. 2 to contact the switch 5QF;
when the station 1 and the station 2 are recovered to be normal by the variable incoming line, the automatic switching device does not act, and manual recovery or remote recovery is needed.
Remote soft control: when the No. 1 incoming line power supply is recovered to be normal and the No. 1QF is split, the remote soft control is effective.
When the No. 2 incoming line power supply is recovered to be normal and the No. 2QF is split, the remote soft control is effective.
When the automatic switching-on/off time is out, the remote soft control is effective.
The protection function: when the station No. 1 is changed into a non-closing position, the automatic switching device is locked when the station No. 1 is manually separated from the station No. 1 by 1QF and short-circuited to jump the station No. 1 by 1QF, and the automatic switching device can be reset after abnormality is relieved.
When the station No. 2 is changed into a non-closing position, the automatic switching device is locked when the station No. 2 is manually separated from the station to the non-closing position, namely the station No. 2 is manually separated from the station to the station No. 2, and the station can be reset after abnormal release.
When the bus switch and the feeder switch are in tripping protection, the automatic switching device is locked, and the automatic switching device can be reset after the abnormality is relieved.
When the alternating current detection unit is abnormal, the automatic switching device is locked, and the automatic switching device can be reset after the abnormality is relieved.
When the opening and closing actions are timed out, the automatic switching device is locked, and the automatic switching device needs to be manually reset at an alarm interface after maintenance is released.
As can be seen in connection with fig. 5: the figure is a user login operation interface, a user login is clicked to enter a login password interface, and a password 1 is input to obtain the system setting permission modification.
As can be seen in connection with fig. 6: the drawing is a system setting operation interface, and clicking the system setting to enter a mutual projection switching setting interface, so that a two-wire-inlet mode and a three-wire-inlet mode can be selected; wherein the two incoming line modes can select 6 incoming line control schemes; clicking the one-key setting can automatically set the opening and closing pulse time, and clicking the saving to save the setting information.
As can be seen in connection with fig. 7: the drawing is a threshold setting operation interface, and an alternating current overvoltage value, an alternating current undervoltage value, a transformer transformation ratio, the number of each section of bus cabinet body and the number of feeder line output paths in the cabinet body can be respectively set by clicking a threshold setting entering interface; clicking the "one-click setting" can automatically set the alternating current overvoltage and undervoltage threshold value, and clicking the "save" to save the above setting information.
As can be seen in connection with fig. 8: the drawing is a background communication operation interface, clicking a background communication entering interface can set equipment ground, baud rate, data bit, stop bit and check bit information of background communication, clicking a save mode to save the set information so as to ensure that the scheme communication is normal.
As can be seen in connection with fig. 9-11: the figure is a system time and alarm display interface, clicking a system time entering interface, setting system display time, and clicking a storage button to store the set information after setting; clicking a main interface 'alarm information' to enter a real-time alarm information interface, and displaying the current alarm information of the system; clicking the history alarm can switch to the history alarm information, and the occurrence time and the ending time of the history alarm information can be checked; clicking the "mute" button can stop the buzzer from buzzing.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A modular system for control of low voltage ac multipath inlet wire switching, characterized by comprising:
the distributed acquisition unit is an integrated data acquisition terminal and is used for monitoring and switching real-time data of the main power supply wire inlet end, the standby power supply wire inlet end, the multipath wire inlet end and the standby power supply wire inlet end in real time;
the PLC main controller is connected with the distributed acquisition units based on the bus and is used for controlling the distributed acquisition units to execute switching actions;
and the incoming line switching unit is based on the switching action received by the distributed acquisition unit, so that the standby power supply incoming line end is automatically controlled to supply power to the main and standby power supply incoming line ends and the fault ends in the multipath incoming line ends.
2. The modular system for low voltage ac multiple-line switching control of claim 1, wherein: the distributed acquisition unit comprises:
the main and standby voltage monitoring module monitors voltage signals of the main and standby power supply lead-in terminals in real time based on the voltage sensor, so that real-time voltage signals of the main and standby power supply lead-in terminals are obtained;
the multi-channel voltage monitoring module is used for monitoring voltage signals of the multi-channel wire inlet ends in real time based on the voltage sensors, so that real-time voltage signals of the multi-channel wire inlet ends are obtained;
the standby voltage monitoring module is used for monitoring the voltage signal of the standby power supply inlet wire end in real time based on the voltage sensor, so that the real-time voltage signal of the standby power supply inlet wire end is obtained;
the data conversion module is used for converting the main voltage signal and the standby voltage signal into numerical values through A/D based on the digital-to-analog converter, so that the converted bus voltage values and the multiple paths of voltage values are transmitted to the pre-judging unit to conduct line power supply state pre-judgment.
3. The modular system for low voltage ac multiple-line switching control of claim 1, wherein: further comprises: the voltage pre-judging unit is used for comparing the real-time data of the main and standby power supply wire inlet ends and the multipath wire inlet ends with preset fixed values, so as to obtain the power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends, and transmitting the obtained power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends to the wire inlet switching unit for automatic switching control;
the voltage prejudging unit includes:
the fixed value preset module is used for presetting a fixed value which accords with the normal range of the voltage so as to be used as a reference for judging whether the main and standby voltages are in the normal range;
the constant value comparison module is used for comparing real-time voltage values of the main and standby power supply lead-in terminals and the multipath lead-in terminals with constant values respectively, so that a main and standby power supply lead-in terminal voltage comparison result and a multipath lead-in terminal voltage comparison result are obtained respectively;
the voltage pre-judging module is used for pre-judging the power supply states of the main and standby power supply wire ends and the multipath wire ends based on comparison results of the voltage values of the main and standby power supply wire ends and the multipath wire ends with fixed values respectively, and transmitting the pre-judging states to the wire inlet switching unit based on the wireless transmission module.
4. The modular system for low voltage ac multiple-line switching control of claim 1, wherein: the inlet wire switching unit includes:
the state receiving module is used for receiving the power supply states of the main power supply inlet wire ends and the standby power supply inlet wire ends and the multipath inlet wire ends transmitted by the voltage prejudging unit and screening power supply lines which do not accord with the normal voltage range;
the wire inlet switching module is used for sending a switching-off instruction to a wire inlet end with abnormal power supply and sending a switching-on instruction to a wire inlet end of the standby power supply, so that normal power supply is provided for the wire inlet end with abnormal power supply.
5. The modular system for low voltage ac multiple-line switching control of claim 2, wherein: the main and standby voltage monitoring module comprises:
the bus voltage monitoring module is used for monitoring bus voltage signals of the main and standby power supply wire inlet ends in real time, transmitting the bus voltage signals to the data conversion module for data conversion, and obtaining bus voltage values of the main and standby power supply wire inlet ends;
the three-phase voltage monitoring module is used for monitoring three-phase voltage signals of the main and standby power supply wire ends in real time, transmitting the three-phase voltage signals to the data conversion module for data conversion, and obtaining three-phase voltage values of the main and standby power supply wire ends.
6. A modular system for low voltage ac multiple-line switching control as claimed in claim 3, wherein: the fixed value preset module is used for presetting a fixed value which accords with a normal voltage range, and the fixed value preset range is as follows: -10% to +10% of the standard value of the phase voltage.
7. A modular system for low voltage ac multiple-line switching control as claimed in claim 3, wherein: the voltage prejudging module comprises:
the delay confirming module is used for carrying out secondary voltage detection on the wire inlet end displaying the power supply abnormality in the comparison result and confirming whether the wire inlet end is in the power supply abnormality state for a long time;
and the state feedback module is used for feeding back the detection result of the delay confirmation module to the voltage pre-judging module and the cloud server, and pre-judging the power supply state of the phase inlet end through the voltage pre-judging module.
8. A modular system for low voltage ac multiple-line switching control as claimed in claim 3, wherein: the voltage prejudging module prejudges the power supply states of the main and standby power supply wire inlet ends and the multipath wire inlet ends, and specifically comprises the following steps:
based on the comparison result of the voltage value and the fixed value of the main and standby power supply inlet wire ends and the comparison result of the voltage value and the fixed value of the multipath inlet wire ends, if the voltage value of any one phase or multiple phases in the voltage value of the main and standby power supply inlet wire ends or the voltage value of the multipath inlet wire ends is smaller than the fixed value, the phase voltage is judged to be abnormal in power supply, the phase is controlled to be opened through the inlet wire switching unit, and then the standby power supply inlet wire ends are controlled to be closed, so that power is supplied to the phase voltage.
9. The modular system for low voltage ac multiple-line switching control of claim 7, wherein: after the delay confirmation module detects the secondary voltage of the wire inlet end with abnormal power supply, if the current wire inlet end is recovered to normally supply power, judging that the current wire inlet end is in short-term fault, and feeding back to the cloud server for early warning; if the current lead-in terminal is still in abnormal power supply, judging that the current lead-in terminal is in long-term fault, and feeding back to the voltage pre-judging module and the cloud server for pre-judging and notifying.
10. The modular system for low voltage ac multiple-line switching control of claim 8, wherein: the standby power supply wire inlet is controlled to supply power for the wire inlet with abnormal power supply, and after the standby power supply wire inlet is operated for a period of time, if the wire inlet with abnormal power supply is recovered to be normal, the standby power supply wire inlet is automatically disconnected, and the original wire inlet is recovered to supply power, so that the system is recovered to the original operation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311650367.3A CN117674391A (en) | 2023-12-04 | 2023-12-04 | Modular system for low-voltage alternating-current multipath incoming line switching control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311650367.3A CN117674391A (en) | 2023-12-04 | 2023-12-04 | Modular system for low-voltage alternating-current multipath incoming line switching control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117674391A true CN117674391A (en) | 2024-03-08 |
Family
ID=90085932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311650367.3A Pending CN117674391A (en) | 2023-12-04 | 2023-12-04 | Modular system for low-voltage alternating-current multipath incoming line switching control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117674391A (en) |
-
2023
- 2023-12-04 CN CN202311650367.3A patent/CN117674391A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102664465B (en) | Breaker controller with dual-power-source switching function, switching system and switching method | |
| CN104967220A (en) | Transformer substation monitoring system | |
| CN111049112B (en) | Automatic fault isolation and self-healing control system and method for 10kV looped network distribution line | |
| CN104993596A (en) | A distribution network automation remote terminal unit based on embedded multiple ARM processors | |
| CN110784017A (en) | Intelligent detection device and method for distribution transformer based on real-time data acquisition | |
| CN104242472B (en) | A kind of railway station low buckling distribution intelligent monitor system | |
| CN210780230U (en) | Switch device for switching high power from off-grid to grid-connected | |
| CN102868221A (en) | Intelligent drawer switch cabinet | |
| CN111431057A (en) | Integrated intelligent ring main unit system, intelligent power distribution network and fault positioning method | |
| CN107181321B (en) | Method for realizing rapid load pulling based on power grid topological structure | |
| CN115051333A (en) | Differential protection and self-healing system for intelligent distribution network | |
| CN111355235B (en) | Mobile power distribution automatic switching device based on visual operation | |
| CN210327143U (en) | Automatic field test device for multi-state feeder | |
| CN117674391A (en) | Modular system for low-voltage alternating-current multipath incoming line switching control | |
| CN203324792U (en) | Plant electric power line and equipment monitoring system based on PLC | |
| CN212258111U (en) | Integrated intelligent ring main unit system and intelligent power distribution network | |
| CN202696279U (en) | Circuit breaker controller with dual-power changeover function and dual-power switching system | |
| CN112332402A (en) | Dual-power measurement and control device | |
| CN207851205U (en) | Converter Station electricity consumption fault monitoring device | |
| CN212304865U (en) | Intelligent direct current automatic protection switching device | |
| CN101154829A (en) | Method for implementing automatic switching of ring main unit standby power by FTU | |
| CN220087006U (en) | Railway digital main transformer backup power automatic switching system | |
| CN204479698U (en) | Wireless networking formula high precision fast line selection device | |
| CN109946591A (en) | A kind of relay-protection tester automated detection system | |
| CN210629195U (en) | Intelligent power monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |