CN108132634B - Intelligent control device and control method for load switch of ring main unit - Google Patents
Intelligent control device and control method for load switch of ring main unit Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
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Abstract
An intelligent control device and a control method for a ring main unit load switch can solve the technical problems of low safety of the ring main unit and high equipment management cost in the current situation. The intelligent control device comprises a microcontroller, a key switch, an LED state indicator, a power module, a photoelectric isolation module, an opening quantity channel and an opening quantity channel, wherein the key switch, the LED state indicator, the power module and the photoelectric isolation module are respectively connected with the microcontroller, the opening quantity channel and the opening quantity channel are respectively in communication connection with the photoelectric isolation module, the power module is further connected with the photoelectric isolation module, and the intelligent control device further comprises a debugging interface, and the debugging interface is connected with the microcontroller. The intelligent control device of the ring main unit load switch is an intelligent operation control mechanism, technology upgrading and reconstruction are carried out on traditional equipment, and an embedded intelligent control unit of an industrial automation technology is integrated, so that the electrical performance of ring main unit equipment is improved.
Description
Technical Field
The invention relates to the field of intelligent control of load switches, in particular to an intelligent control device and control method for a ring main unit load switch.
Background
At present, with rapid development of power grids, in smart power grid construction, various kinds of switch devices are required to be automatic complete equipment with a remote operation function. Early ring main unit designs do not have remote operation function, and with manual operation as the main part, the security is not high, and equipment management cost is big, and reaction processing time is long. Therefore, aiming at the current situation, the intelligent control device of the ring main unit is developed to meet the development requirement of the power grid.
Disclosure of Invention
The intelligent control device and the control method for the ring main unit load switch can solve the technical problems of low safety of the ring main unit and high equipment management cost in the current situation.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a looped netowrk cabinet load switch intelligence controlling means, includes microcontroller, key switch, LED status indicator lamp, power module, photoelectric isolation module, volume passageway that opens, key switch, LED status indicator lamp, power module and photoelectric isolation module are connected with microcontroller respectively, volume passageway and volume passageway that opens are connected with photoelectric isolation module communication respectively, power module still is connected with photoelectric isolation module, power module inserts 220V alternating current from the outside, and parallelly connected a piezo-resistor inserts AC/DC conversion module FAD6-0524-WFCI chip and converts two way direct current voltage, and one way is converted into 24V direct current, as photoelectric coupler and relay driving source, and another way is converted into 5V direct current, is being converted into 3.3V output through DC/DC conversion module AMS1117, supplies power to the treater.
Further, the microcontroller employs STM32F103C8T6 as a core processor.
Furthermore, the opening amount channel uses 5 channels for opening amount, the opening amount channel is connected with a signal through a terminal of a bottom plate J5, is connected with a terminal of a substrate J3, is isolated through photoelectric couplers U4, U5, U8, U9 and U10, and is input into the processor.
Further, the opening quantity of the opening quantity channel is provided with a plurality of output channels of switching-on output, switching-off output, remote signal output and hand signal output, the opening quantity outputs control signals from a processor, and the control signals are isolated and connected to a substrate J2 terminal through photoelectric couplers U11, U12, U13 and U14, and are connected with a substrate J1 terminal, and the control signals are output through a relay.
After the platform is initialized by the system, input signals of keys and an input channel are queried in real time, so that system logic control analysis is realized, and switching-off output and switching-on output are processed in an interrupt service subroutine;
the method comprises the following steps:
1.1 Initializing a system platform; the system configures a system clock, an I/O, a watchdog and a timer interrupt module; initializing logic control output and LEDs; enabling a timer, a watchdog;
2.1 Zero clearing the watchdog; after the system initialization is completed, entering a cycle, feeding dogs once every 12000 times, and resetting the watchdog;
3.2 A) scanning keyboard; the system scans and monitors the opening, closing, opening and closing control switch and then correspondingly sets effective key operation;
4.1 Logic overall control; the logic total control sets the opening quantity zone bit after judging the state of a plurality of opening quantity of the closing position, the controlling position, the grounding position and the low air pressure position and the switch zone bit;
5.2 Executing LED logic control; the system lights or turns off the LED indicator lamp according to a plurality of input signals of opening, closing and grounding.
Further, the step 4.1) includes:
4.11 Determining a closing and opening state; after the program enters the logic overall control, firstly, judging whether the intelligent control device of the ring main unit is currently in the combined position or the split position according to the switching-in amount combined position input signal, and placing corresponding flag bits;
4.12 Determining a remote/in-situ status; judging whether the current position is a remote position or a local position, and positioning a bit zone bit; judging whether the low air pressure position is closed or not and whether the grounding is opened or not; only if the conditions of closing the low-pressure position and opening the grounding position are met, opening and closing and opening and closing stopping control output operation can be carried out, if the conditions are not met, the operation is finished after the relevant zone bits of opening and closing operation are cleared;
4.13 Executing the switching logic control; judging whether the current state is in the close position or not, if so, judging that the current state is far away and in situ; detecting a corresponding opening command, and outputting opening if the corresponding opening command is received;
4.14 Executing switching-on logic control; judging whether the current state is in a split position or not, if so, judging whether the current state is in a remote or in-situ state, detecting whether a corresponding closing command exists or not, detecting the closing command, and closing and outputting;
4.15 Executing the opening and closing stop control; detecting whether the opening and closing start zone bit is set, if yes, detecting whether the opening of the corresponding opening action zone bit is in place, and if yes, stopping corresponding control output.
Further, the method also comprises an interrupt service subroutine 5.2), specifically comprising the following steps:
5.21 After the interrupt is entered, resetting the watchdog;
5.22 Judging whether the closing flag bit is true, if so, judging the closing output time, otherwise, not entering closing operation;
5.23 Judging whether the switching-on output time exceeds 1s; if the switching-on output time exceeds 1s, switching-on output is closed;
5.24 Closing the closing output and the flag bit;
5.25 Judging whether the brake-off flag bit is true, if so, judging the brake-off output time, otherwise, not entering brake-off closing operation;
5.28 Judging whether the opening output time exceeds 1s; if the opening output time exceeds 1s, closing the opening output;
5.27 Closing the opening output and the flag bit;
5.28 Clearing the interrupt flag bit;
5.29 Exit the interrupt.
According to the technical scheme, the intelligent control device of the ring main unit load switch is an intelligent operation control mechanism, technical upgrading and transformation are carried out on traditional equipment, and an embedded intelligent control unit of an industrial automation technology is integrated, so that the electrical performance of ring main unit equipment is improved. The load switch of the intelligent control device of the ring main unit has the functions of controlling opening and closing operations, and has opening and closing indication and grounding switch position indication.
Compared with the traditional control ring main unit opening and closing equipment, the intelligent operation device has the advantages that the system adopts the microcontroller with excellent performance, the intelligent function is increased, remote/on-site operation can be selected for opening and closing, and the system has opening and closing state indication, grounding switch position judgment and low air pressure state judgment. The anti-interference technology is adopted in the signal input and output channels and the power supply of the system, so that the anti-interference capability of the system is improved. In addition, the industrial electronic element is adopted, a protection circuit is added, and the device has the characteristics of high reliability, long service life, strong anti-interference capability and the like, and is small in appearance and simple to operate.
Drawings
FIG. 1 is a circuit block diagram of the present invention;
FIG. 2 is a circuit diagram of a microcontroller of the present invention;
FIG. 3 is a circuit diagram of a power module of the present invention;
FIG. 4 is a circuit diagram of a key switch of the present invention;
FIG. 5 is a circuit diagram of an LED status indicator lamp of the present invention;
FIG. 6 is a circuit diagram of a photo-isolation module of the present invention;
FIG. 7 is a circuit diagram of an open dose channel of the present invention;
FIG. 8 is a circuit diagram of an open-ended channel of the present invention;
FIG. 9 is a circuit diagram of a debug interface of the present invention;
FIG. 10 is a main program flow chart of the present invention;
FIG. 11 is a flow chart of the overall control logic of the present invention;
FIG. 12 is a flow chart of a timer interrupt service routine of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-9, the intelligent control device for the ring main unit load switch in the embodiment comprises a microcontroller, a photoelectric isolation module, a power module, an opening and closing quantity channel, a key switch, an LED state indicator light and a debugging interface, wherein the intelligent control device for the ring main unit load switch has the functions of controlling the ring main unit to open and close, and has the functions of opening and closing indication, grounding switch position indication and detecting the low air pressure state.
The system power supply of the embodiment converts the externally accessed AC220V and provides power for the micro controller and the photoelectric isolation device; the microcontroller uses the adjustable interface to debug or download the software; the microcontroller performs corresponding logic processing according to the received input channel and the key input signal, and outputs control through the input channel.
Wherein:
processor and method for controlling the same
The microcontroller STM32F103C8T6, as the system core processor, clocks the system using an internal 8M clock. The microcontroller outputs corresponding logic control signals from the opening quantity channel and outputs operation indication signals along with the LED module after processing according to the received commands input by the keys and the opening quantity channel or the detected equipment state.
The microcontroller mainly receives a brake-off command through a brake-off button SW1, receives a brake-on command through a brake-on button SW2, and detects the on-off position input by a PB10 on-off channel and the input signal of a dial switch S2, and judges whether to execute brake-off or brake-on operation by detecting a low-pressure input channel signal and a ground input channel signal of the on-off quantity; if the system detects that the current state is in the split position and a split command is received, executing a split operation; if the system detects that the current state is in the closing position and a closing command is received, closing operation is executed.
Opening an access channel
The system uses 5 channels to open into the volume, the volume of opening channel is connected with the signal through the terminal of the base plate J5, is connected with the terminal of the base plate J3, is isolated through U4, U5, U8, U9 and U10 photoelectric couplers, and is input into the processor.
Opening a metering channel
The opening amount is provided with output channels such as closing output, opening output, remote signal output, hand-opening signal output and the like, the opening amount outputs control signals from a processor, and the control signals are isolated and connected to a substrate J2 terminal through photoelectric couplers U11, U12, U13 and U14 and are connected with a substrate J1 terminal, and the control signals are output through a relay.
Power supply module
The power supply module is connected with 220V alternating current from the outside, connected with an AC/DC conversion module FAD6-0524-WFCI chip in parallel to convert the alternating current into two paths of direct current voltages, one path of direct current voltage is converted into 24V direct current to serve as a photoelectric coupler and relay driving source, the other path of direct current voltage is converted into 5V direct current voltage, and the direct current voltage is converted into 3.3V output through a DC/DC conversion module AMS1117 to supply power to the processor and is used as an LED, key and photoelectric coupler driving source.
Signal connection correspondence relationship between the integrated circuit chip and other devices in this embodiment:
(1) The pin of the microcontroller STM32F103C8T6 chip is connected with 48 pins of the STM32F103C8T6 chip, and the external connection of the pins is as follows:
the power supply is connected with the GND pin:
pin 9 VCC-VCC;
24 th pin VCC-VCC;
36 th pin VCC-VCC;
48 th pin VCC-VCC;
pin 8 GND-GND;
23 rd pin gnd—gnd;
35 th pin GND-GND;
48 th pin GND-GND.
The pin connection of the operation signal indicator lamp:
and the 3 rd pin PC 14-R10 resistor is connected in series with the D4 device LED lamp.
And the pins of the crystal oscillator circuit are connected with each other:
pin 5 PD 0-OSCIN-pin 1 of crystal oscillator Y1;
pin 6 PD1-OSCOUT—Pin 3 of Crystal Oscillator Y3.
The pin connection of the reset circuit:
pin 7 nrst—reset circuit.
LED pilot lamp pin connection:
25 th pin FEN-LED-FEN-LED pin of the switching signal lamp LED 4;
the 26 th pin HE-LED, namely an HE-LED pin of the switching-on signal lamp LED 3;
pin 28 JIEDI-LED-the JIEDI-LED pin of ground signal LED 1;
key input pin connection:
pin 30 Yuan/JIU —Yuan/JIU pin of remote/local switch S2;
45 th pin hezha—the HEZHA pin of the closing switch SW 2;
46 th pin FENZHA-FENZHA pin of the opening switch SW 1.
And (3) connecting pins of the opening quantity channel:
32 th pin HE-OUT—HE-OUT pin of the optocoupler U14;
42 th pin FENZHA-XH-FENZHA-XH pin of the photoelectric coupler U11;
pin 43 Yuan/JIU-XH-Yuan/JIU-XH pin of the optocoupler U12.
And (3) connecting the pins of the opening quantity channel:
21 pin HW/FW-HW/FW pin of photo coupler U4;
19 pin JDW — JDW pin of the optocoupler U5;
16-pin dqyw—the DQYW pin of the optocoupler U8;
15 pins KFW-the KFW pins of the photoelectric coupler U9;
14 pin khw—khw pin of the optocoupler U10;
debug interface JTAG pin connection:
pin 7 nrst—jtag interface RES pin;
pin 34 TMS-JTAG interface TMS pin;
37 th pin TCK-JTAG interface TCK pin;
pin 38 tdi—jtag interface TDI pin;
39 th pin tdo—jtag interface TDO pin;
pin 40 PB 4-JTAG interface pin 3 PB4.
(2) The power module chip AC/DC FAD6-0524-WFCI pin connection:
pin 1 FG—ground;
pin 2 VIN 1-external AC220V fire wire (L);
pin 3 VIN 2-external AC220V fire wire (N);
pin 4 GND-J1 terminal pins 1 and 3;
pin 5+5V—J1 terminal pins 5 and 7;
pin 7, pin 24VGND—J1 terminal pins 27 and 29;
pin 8+24v—j1 terminals 23 and 25 pins.
(3) Power module chip DC/DC AMS1117 pin connection:
1 st pin GND-GND;
pin 2, vout—VCC;
pin 3+5V—J2 terminal pins 5 and 7.
The flow of the program of the present embodiment
As shown in fig. 10, the load switch main program steps are as follows:
1) And initializing a system platform. The system configures a system clock, I/O, watchdog, timer interrupt and the like; initializing logic control output and LEDs; enabling a timer, a watchdog;
2) And (5) resetting the watchdog. After the system initialization is completed, entering a cycle, feeding dogs once every 12000 times, and resetting the watchdog;
3) The keyboard is scanned. The system scans and monitors the opening, closing, opening and closing control switch and then correspondingly sets effective key operation;
4) Logic overall control. The logic total control sets the opening quantity zone bit after judging the state of the opening quantity of the closing position, the control position, the grounding position, the low air pressure position, and the like and the switch zone bit;
5) LED logic control is performed. The system lights or turns off the LED indicator lamp according to a plurality of input signals of opening, closing and grounding.
As shown in fig. 11, the logic overall control procedure of the present embodiment includes the steps of:
1. and determining the combination and separation state. After the program enters the logic overall control, firstly, judging whether the intelligent control device of the ring main unit is currently in the closed position or the open position according to the open-close position input, and placing corresponding flag bits;
2. a remote/in-place status is determined. Judging whether the current position is a remote position or a local position, and positioning a bit zone bit; judging whether the low air pressure level is closed or not and whether the grounding is opened or not. Only if the conditions of closing the low-pressure position and opening the grounding position are met, opening and closing and opening and closing stopping control output operation can be carried out, if the conditions are not met, the operation is finished after the relevant zone bits of opening and closing operation are cleared;
3. and executing the logic control of the opening gate. Judging whether the current state is in the close position or not, if so, judging that the current state is far away and in situ; detecting a corresponding opening command, and outputting opening if the corresponding opening command is received;
4. and executing switching-on logic control. Judging whether the current state is in a split position or not, if so, judging whether the current state is in a remote or in-situ state, detecting whether a corresponding closing command exists or not, detecting the closing command, and closing and outputting;
5. and executing the switching-on and switching-off stopping control. Detecting whether the opening and closing start zone bit is set, if yes, detecting whether the opening of the corresponding opening action zone bit is in place, and if yes, stopping corresponding control output.
The execution flow of the interrupt service routine of this embodiment:
as shown in fig. 12, the system uses a timer 2 as an interrupt source, generates an interrupt every 10ms, detects the status of the flag bits such as opening and closing, and makes corresponding operations, and the following is the execution flow of the interrupt service subroutine:
1. after the system is interrupted, resetting the watchdog;
2. judging whether the closing flag bit is true, if true, judging the closing output time, otherwise, not entering closing operation;
3. judging whether the switching-on output time exceeds 1s. If the switching-on output time exceeds 1s, switching-on output is closed;
4. closing the closing output and the flag bit.
5. Judging whether the brake-off flag bit is true, if so, judging the brake-off output time, otherwise, not entering brake-off closing operation;
6. judging whether the opening output time exceeds 1s. If the opening output time exceeds 1s, closing the opening output;
7. and closing the opening output and the flag bit.
8. Clearing an interrupt flag bit;
9. the interrupt is exited.
The load switch of the intelligent control device of the ring main unit has the functions of controlling the opening and closing of the ring main unit, and has the opening and closing indication, the grounding switch position indication and the detection of the low air pressure state.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (1)
1. Control method based on looped netowrk cabinet load switch intelligent control device, characterized in that, looped netowrk cabinet load switch intelligent control device includes: the device comprises a microcontroller, a key switch, an LED state indicator, a power module, a photoelectric isolation module, an input channel and an output channel, wherein the key switch, the LED state indicator, the power module and the photoelectric isolation module are respectively connected with the microcontroller, the input channel and the output channel are respectively in communication connection with the photoelectric isolation module, the power module is also connected with the photoelectric isolation module, 220V alternating current is externally connected into the power module, a piezoresistor is connected into an AC/DC conversion module FAD6-0524-WFCI chip in parallel to be converted into two paths of direct current voltages, one path of direct current is converted into 24V direct current to be used as a driving source of a photoelectric coupler and a relay, the other path of direct current is converted into 5V direct current, and the direct current is converted into 3.3V output through a DC/DC conversion module AMS1117 to supply power to a processor; the microcontroller adopts STM32F103C8T6 as a core processor; the opening amount channel uses 5 channels for opening amount, the opening amount channel is connected with a signal through a terminal of a base plate J5, is connected with a terminal of a base plate J3, is isolated through photoelectric couplers U4, U5, U8, U9 and U10, and is input into the processor; the opening quantity of the opening quantity channel is provided with a plurality of output channels of closing output, opening output, remote signal output and hand-separated signal output, the opening quantity outputs control signals from a processor, and the control signals are isolated and connected to a substrate J2 terminal through photoelectric couplers U11, U12, U13 and U14, are connected to a substrate J1 terminal and output through a relay;
the control method comprises the following steps:
after the system initializes the platform, input signals of keys and input channels are queried in real time to realize logic control analysis of the system, and break-off output and switch-on output are processed in an interrupt service subroutine;
the method comprises the following steps:
1.1 Initializing a system platform; the system configures a system clock, an I/O, a watchdog and a timer interrupt module; initializing logic control output and LEDs; enabling a timer, a watchdog;
2.1 Zero clearing the watchdog; after the system initialization is completed, entering a cycle, feeding dogs once every 12000 times, and resetting the watchdog;
3.1 A) scanning keyboard; the system scans and monitors the opening, closing, opening and closing control switch and then correspondingly sets effective key operation;
4.1 Logic overall control; the logic total control sets the opening quantity zone bit after judging the state of a plurality of opening quantity of the closing position, the controlling position, the grounding position and the low air pressure position and the switch zone bit;
5.1 Executing LED logic control; the system turns on or off the LED indicator lamp according to a plurality of input signals of opening, closing and grounding;
the step 4.1) comprises:
4.11 Determining a closing and opening state; after the program enters the logic overall control, firstly, judging whether the intelligent control device of the ring main unit is currently in the combined position or the split position according to the switching-in amount combined position input signal, and placing corresponding flag bits;
4.12 Determining a remote/in-situ status; judging whether the current position is a remote position or a local position, and positioning a bit zone bit; judging whether the low air pressure position is closed or not and whether the grounding is opened or not; only if the conditions of closing the low-pressure position and opening the grounding position are met, opening and closing and opening and closing stopping control output operation can be carried out, if the conditions are not met, the operation is finished after the relevant zone bits of opening and closing operation are cleared;
4.13 Executing the switching logic control; judging whether the current state is in the close position or not, if so, judging that the current state is far away and in situ; detecting a corresponding opening command, and outputting opening if the corresponding opening command is received;
4.14 Executing switching-on logic control; judging whether the current state is in a split position or not, if so, judging whether the current state is in a remote or in-situ state, detecting whether a corresponding closing command exists or not, detecting the closing command, and closing and outputting;
4.15 Executing the opening and closing stop control; detecting whether a switching-on and switching-off start zone bit is set, if so, detecting whether the switching-on zone bit corresponding to the switching-off action zone bit is in place or not, and if so, stopping corresponding control output;
also comprising an interrupt service subroutine 5.2), comprising in particular the following steps:
5.21 After the interrupt is entered, resetting the watchdog;
5.22 Judging whether the closing flag bit is true, if so, judging the closing output time, otherwise, not entering closing operation;
5.23 Judging whether the switching-on output time exceeds 1s; if the switching-on output time exceeds 1s, switching-on output is closed;
5.24 Closing the closing output and the flag bit;
5.25 Judging whether the brake-off flag bit is true, if so, judging the brake-off output time, otherwise, not entering brake-off closing operation;
5.27 Judging whether the opening output time exceeds 1s; if the opening output time exceeds 1s, closing the opening output;
5.27 Closing the opening output and the flag bit;
5.28 Clearing the interrupt flag bit;
5.29 Exit the interrupt.
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| CN201667535U (en) * | 2010-07-16 | 2010-12-08 | 重庆迅驰电气有限公司 | Electric power system line protection observe and control apparatus |
| RU126157U1 (en) * | 2012-08-03 | 2013-03-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Волгоградский государственный университет" | DEVICE FOR AUTOMATIC TEMPERATURE REGULATION WITH WIRELESS TRANSFER OF MEASURING INFORMATION |
| CN103972807A (en) * | 2014-05-21 | 2014-08-06 | 纳图（常州）电气有限公司 | Ring main unit distribution automation reconstruction device |
| CN204290071U (en) * | 2014-12-16 | 2015-04-22 | 深圳市双盈电气有限公司 | Looped network cabinet switch mechanism intelligent controlling device |
| CN104485645A (en) * | 2014-12-31 | 2015-04-01 | 南宏电力科技有限公司 | Microcomputer relay protection method and device adopted on switch cabinet with load switch |
| CN205139272U (en) * | 2015-11-04 | 2016-04-06 | 国家电网公司 | Join in marriage power -grid switch analog switch unit for equipment |
| CN206480975U (en) * | 2016-11-30 | 2017-09-08 | 北京合锐赛尔电力科技股份有限公司 | A kind of digital integrated intelligent ring main unit |
| CN207557730U (en) * | 2018-02-14 | 2018-06-29 | 北京清畅电力技术股份有限公司 | A kind of ring main unit load switch Intelligent control device |
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| CN108132634A (en) | 2018-06-08 |
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