CN117040108B - Software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit - Google Patents
Software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit Download PDFInfo
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- CN117040108B CN117040108B CN202310804575.8A CN202310804575A CN117040108B CN 117040108 B CN117040108 B CN 117040108B CN 202310804575 A CN202310804575 A CN 202310804575A CN 117040108 B CN117040108 B CN 117040108B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 230000003750 conditioning effect Effects 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 9
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention belongs to the technical field of computers and information, and discloses a software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit, which comprises: the electronic circuit drives the power electric circuit, the insulated gate bipolar transistor and the peripheral driving circuit are adopted for control, and the switching-off control is driven reliably by two groups of IGBTs; the isolating switch opening and closing stoping circuit; the digital circuit extraction circuit adopts a two-way optocoupler isolation method and a piezoresistor to carry out EMC surge and pulse group protection on a conditioning circuit acquired at the front end. The invention realizes the control of the electric equipment with power by adopting the weak-current electronic circuit; the integrated miniaturization realizes a plurality of deployments of a standard screen cabinet, realizes the control of a plurality of isolating switches, replaces a large-scale electric circuit by an electronic circuit, reduces the cost and reduces the size; the dual locking of software and hardware locking realizes reliable control of the isolating switch and prevents the isolating switch from being operated by mistake due to the conditions of electromagnetic compatibility and the like.
Description
Technical Field
The invention belongs to the technical field of computers and information, and particularly relates to a software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit.
Background
The overhead line isolating switch is an important device for electric traction power supply of an electrified railway, and has the main functions of isolating faults, sectionalizing operation, changing operation modes and the like, and the overhead line isolating switch with a large number and wide distribution range exists in a hub station, and is generally operated in a remote mode and monitored in a remote mode, and at present, in the electrified railway, the control mode and the feedback mode of signals are divided into two main flow control modes;
the first is to arrange the monitoring units of the substation along the railway, the monitoring units of the substation remotely control the instruction issued by the dispatching center in a communication mode of the optical fiber, control the operating mechanism and drive the disconnecting switch to switch on or off in a mechanical motion mode, and the second is to reduce the arrangement of the monitoring units of the substation along the railway, control the direct lead connection of the switch cabinet through the contact net in or near the railway, control the operating mechanism through the voltage of DC220V and drive the disconnecting switch to switch on or off in a mechanical motion mode; through 220V voltage stoping signals, a large number of electrical devices (time relays, alternating current contactors, intermediate relays and the like) are needed in the mode, a large number of electrical wires are routed in the mode, one control mode is used in a place with low temperature and long communication distance, optical fiber modules and optical fiber wires are easy to light failure, phenomena of refusal operation and false alarm communication often occur in the mode, the other mode is inconvenient to maintain and high in cost, 8-12 isolating switches cannot be controlled in a centralized manner by a contact network control switch screen, and therefore a stable and reliable control mode needs to be designed.
Disclosure of Invention
The invention aims to provide a software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit so as to solve the problems in the background technology.
In order to achieve the above object, the present invention provides the following technical solutions: a software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit comprises:
the electronic circuit drives the power electric circuit, the insulated gate bipolar transistor and the peripheral driving circuit are adopted for control, and the switching-off control is driven reliably by two groups of IGBTs;
the isolating switch opening and closing stoping circuit;
the digital circuit extraction circuit adopts a bidirectional optocoupler isolation mode and a piezoresistor to carry out EMC surge and pulse group protection mode on a conditioning circuit acquired at the front end;
the analog signal is recovered, and a linear circuit sensor chip is adopted in a circuit of a loop where the disconnecting contact and the closing contact of the isolating switch are positioned;
the communication PCB circuit board-mother PCB circuit board-control PCB circuit board 4U two-slot mode adopts a mode of multiplexing a plurality of groups of signal lines, multiplexing a plurality of groups of external circuit interfaces for miniaturization, and integrating the monitoring units;
software locking, namely configuring the address and the state of remote signaling by the high 8 bits and configuring the address and the executed action of a remote control signal by the low 8 bits in a mode that a configuration file is powered off and is not lost;
the local control hardware is locked, the hardware is locked in the mode of interlocking an exclusive-or gate and an AND gate realization button, the priority is the same as that of the software locking, and the isolation switch can be switched on and off only when the hardware locking condition and the software locking condition are met;
the remote control hardware is locked, and the aim of controlling by using MCU or using a mechanical button is fulfilled by gating different CMOS chips;
the hardware locking delay local control and the remote control require that the disconnecting delay locking logic of the isolating switch meets certain conditions;
the disconnecting delay locking logic of the isolating switch needs to meet 4 conditions: (1) the mechanical button conditioning circuit outputs low level of a switching-on button IGBT1/IGBT 2; (2) the change-over switch is switched to the change-over switch to output a low level; (3) the externally latched signal outputs a low level; (4) the mechanical button of the screen cabinet or the mechanical button of the monitoring unit outputs high level, and the opening button outputs low level after passing through the inverter; which satisfies the following logic formula: output y= (1) + (2) + (3) + (4).
Preferably, the composite power semiconductor device consists of BJT and MOSFET, the grid driving is controlled by a driving power supply and an input control signal, and finally contacts of switching on and switching off output are controlled.
Preferably, if and only if both are driven, the output is DC220V, completing the control of the electric motor; by setting different differential mode and common mode circuits, electromagnetic compatibility is enhanced, and electromagnetic and strong current interference on site is reduced.
Preferably, the digital circuit extraction circuit adopts 74LVC245 and adopts a time division multiplexing mode, so that the circuit scale is reduced.
Preferably, a conditioning circuit collected at the front end adopts bidirectional optocoupler isolation, and adopts piezoresistors to carry out EMC surge and pulse group protection;
preferably, the analog signal is mined; the circuit of the loop where the disconnecting contact and the closing contact of the isolating switch are positioned adopts a linear circuit sensor chip and is characterized in that the circuit is formed by a formula V ADC_1 ＝3.3/2+0.066*I 220V The loop pushes out the current of the 220V loop by combining the acquired voltage of the ADC 1; when I>I Motor limit When the software is subjected to overcurrent speed breaking, the isolating switch is disconnected to switch on and off, and the power supply voltage DC220 of the motor is cut off; the limit current of the motor can be configured according to different actual motor models.
Preferably, the logic of the drivable output of the closing of the isolating switch has four cases in total; if and only if V Button switch-on ＝H，V Button switch-on When=l, the contact of the switch can be driven.
Preferably, a dial processing mode is adopted, different resistor combinations are adopted to replace the effect of a large time relay, and meanwhile, the cost is reduced.
The beneficial effects of the invention are as follows:
the invention realizes the control of the electric equipment with power by adopting the weak-current electronic circuit; reliably replacing the sampling loop in the electrical circuit by using the electronic circuit; the structure adopts a mode of 4U two grooves of a communication PCB circuit board, a mother PCB circuit board and a control PCB circuit board, and the functions required by the intensification (remote communication, remote control signal control, remote signal acquisition, local button operation, auxiliary local auxiliary signal acquisition, distributed centralized control and the like) are realized; the space utilization rate of the contact net control screen cabinet is improved, so that 8-12 contact net isolating switch 4U monitoring units can be integrated in the screen cabinet; the security and reliability of control are ensured by adopting a strategy of software locking and hardware locking; the integrated miniaturization realizes a plurality of deployments of a standard screen cabinet, realizes the control of a plurality of isolating switches, replaces a large-scale electric circuit by an electronic circuit, reduces the cost and reduces the size; the dual locking of software and hardware locking realizes reliable control of the isolating switch and prevents the isolating switch from being operated by mistake due to the conditions of electromagnetic compatibility and the like.
Drawings
FIG. 1 is a schematic flow diagram of a system of the present invention;
FIG. 2 is a graph of the electrical drive of the present invention;
FIG. 3 is a circuit diagram of the driving power of the electronic circuit of the present invention;
FIG. 4 is a schematic diagram of the driving principle of the present invention;
FIG. 5 is a schematic diagram of an EMC circuit of the present invention;
FIG. 6 is a circuit diagram of the disconnecting switch of the invention;
FIG. 7 is a schematic diagram of a digital circuit mining circuit according to the present invention;
FIG. 8 is a conditioning circuit diagram of front end acquisition in accordance with the present invention;
FIG. 9 is a schematic representation of an analog signal recovery of the present invention;
FIG. 10 is a latching logic diagram of the drive closing contact of the present invention;
FIG. 11 is a logic diagram of the actuation break contact latch of the present invention;
FIG. 12 is a schematic diagram of the latching logic of the drive contact of the present invention;
FIG. 13 is a circuit diagram of a remote control hardware latch according to the present invention;
FIG. 14 is a logic diagram of the closing hardware of the present invention;
FIG. 15 is a logic diagram of a split gate hardware latch according to the present invention;
FIG. 16 is a schematic diagram of the latching logic of the contacts of the present invention;
FIG. 17 is a diagram of the opening and closing lockout logic of the present invention;
FIG. 18 is a circuit diagram of an opening and closing latching system of the present invention;
FIG. 19 is a block diagram of the hardware and software of the present invention;
FIG. 20 is a circuit diagram of a dialing circuit according to the present invention;
fig. 21 is a diagram of an interface definition of 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.
As shown in fig. 1 to 21, the embodiment of the present invention provides a software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit, which includes:
the electronic circuit drives the power electric circuit, the insulated gate bipolar transistor and the peripheral driving circuit are adopted for control, and the switching-off control is driven reliably by two groups of IGBTs;
the isolating switch opening and closing stoping circuit;
the digital circuit extraction circuit adopts a bidirectional optocoupler isolation mode and a piezoresistor to carry out EMC surge and pulse group protection mode on a conditioning circuit acquired at the front end;
the analog signal is recovered, and a linear circuit sensor chip is adopted in a circuit of a loop where the disconnecting contact and the closing contact of the isolating switch are positioned;
the communication PCB circuit board-mother PCB circuit board-control PCB circuit board 4U two-slot mode adopts a mode of multiplexing a plurality of groups of signal lines, multiplexing a plurality of groups of external circuit interfaces for miniaturization, and integrating the monitoring units;
software locking, namely configuring the address and the state of remote signaling by the high 8 bits and configuring the address and the executed action of a remote control signal by the low 8 bits in a mode that a configuration file is powered off and is not lost;
the local control hardware is locked, the hardware is locked in the mode of interlocking an exclusive-or gate and an AND gate realization button, the priority is the same as that of the software locking, and the isolation switch can be switched on and off only when the hardware locking condition and the software locking condition are met;
the remote control hardware is locked, two groups of 74LVC245 APWs are adopted for gating, the mechanical characteristics of a small-sized change-over switch are selected to be that one group of loops are conducted for each gear, and the aim of controlling by using an MCU or a mechanical button is achieved by gating different CMOS chips;
wherein PC2, PD0, PC9, PD15 are the corresponding pins of the chip (PC 8 → IGBT_1, PD0 → IGBT_2, PC9 → IGBT_3, PD15 → IGBT_4) are conducted when the YF_EN remote transfer switch is turned on. When JD_EN gates, the mechanical signal gates and outputs to the corresponding pins (button_CLOSE_OUT→IGBT_1, button_CLOSE_OUT→IGBT_2, button_OPEN_OUT→IGBT_3, button_OPEN_OUT→I GBT_4).
The hardware locking delay local control and the remote control require that the disconnecting delay locking logic of the isolating switch meets certain conditions;
the disconnecting delay locking logic of the isolating switch needs to meet 4 conditions: (1) the mechanical button conditioning circuit outputs a low level of a closing button IGBT1/I GBT2 (a breaking button is pressed down); (2) the change-over switch is switched to the change-over switch to output a low level; (3) the externally latched signal outputs a low level; (4) the mechanical button of the screen cabinet or the mechanical button of the monitoring unit outputs high level, and the opening button outputs low level after passing through the inverter; after the 4 conditions are passed, the switching-off button is driven to trigger and output a low level, and after the 555 chip delays, the switching-off IGBT3/I GBT4 of the output button is low level. After the 4 conditions are passed, the switching-off button is driven to trigger and output a low level, and after the 555 chip delays, the switching-off IGBT3/IGBT4 of the output button is at the low level.
Which satisfies the following logic formula: output y= (1) + (2) + (3) + (4). The locking logic is a closing locking logic diagram and an opening locking logic diagram, which satisfy the following logic formula: output y= (1) + (2) + (3) + (4). The latching logic is as follows in fig. 7 and 8.
The composite power semiconductor device consists of BJT and MOSFET, and controls the gate drive (IGBT_ 1_G, I GBT_2_G, IGBT_3_G, I GBT_ 4_G) through the driving power supply (CLOSE_DRVPPWR, OPEN_DRVPWER) and the input control signals (IGBT_1_H, IGBT_2_H, I GBT_3_H, IGBT_ 4_H), and finally controls the contacts (CLOSE+, CLOSE-, OPEN+ and OPEN-) of the switching-on and switching-off output. When the driving power supply is at a high level of 3.3V and the input control signal is at a high level of 3.3V, the grid electrode drives and outputs a high level of 15V, and the triode corresponding to the I KW25N120T2 is driven to be conducted, and finally the CLOSE+ outputs a positive DC220V. The same principle is applied to the other 4 parts. Circuit fig. 3, driving principle schematic diagram is as fig. 4.
Wherein, if and only if both are driven, the output is DC220V, and the control of the electric motor is completed; by setting different differential mode and common mode circuits, electromagnetic compatibility is enhanced, and electromagnetic and strong current interference on site is reduced.
The digital circuit extraction circuit adopts 74LVC245 and adopts a time division multiplexing mode, so that the scale of the circuit is reduced. By enabling the working states of U36 and U37 respectively by YX3_CRTL1 and YX3_CTRL2, when YX3_CRTL1 is enabled and YX3_CRTL2 is closed, YX3_L_1, YX3_L_2, YX3_L_3, YX3_L_4, YX3_L_5, YX3_L_6 and YX3_L_7 acquire signals I GBT_1_Q, I GBT_2_Q of a driving grid, YX3_LVN_1, YX3_LVN_2, YX3_LVN_3 of DC220V, a closing locking signal and a remote control power supply signal; when yx3_crtl2 is enabled, yx3_crtl1 is turned off, yx3_l_1, yx3_l_2, yx3_l_3, yx3_l_4, yx3_l_5, yx3_l_6, yx3_l_7 will acquire signals I gbt_3_Q, I gbt_2_q of the driving gate, yx3_lvn_4, yx3_lvn_5, yx3_lvn_6 of dc220v, split-gate latch signals for acquiring digital signals: remote communication, remote control signal control, remote signal acquisition, local button operation, and auxiliary local auxiliary signal acquisition.
The conditioning circuit collected at the front end adopts bidirectional optocoupler isolation, and adopts piezoresistors to carry out EMC surge and pulse group protection;
wherein the analog signal is recovered; the circuit of the loop where the disconnecting contact and the closing contact of the isolating switch are positioned adopts a linear circuit sensor chip and is characterized in that the circuit is formed by a formula V ADC_1 ＝3.3/2+0.066*I 220V The loop pushes out the current of the 220V loop by combining the acquired voltage of the ADC 1; when I>I Motor limit When the software is subjected to overcurrent speed breaking, the isolating switch is disconnected to switch on and off, and the power supply voltage DC220 of the motor is cut off; the limit current of the motor can be configured according to different actual motor models.
The logic of the isolating switch switching-on drivable output has four situations in total; if and only if V Button switch-on ＝H，V Button switch-on When=l, the contact of the switch can be driven.
The dial-up processing mode is adopted, different resistors are combined to replace the effect of a large time relay, and meanwhile cost is reduced. The 6-bit dial switch is divided into two groups, the two groups are respectively provided for the switching-off logic and the switching-on logic, the two 555 chips are connected through a feedback circuit conditioning circuit, when switching-on and switching-off are triggered, after H is output to drive, the time T=1.1RC of delay output is automatically closed. Where r=15k, 10K, 4.7k, c=1000 uF. The decibels were calculated to be 5 seconds, 10 seconds and 15 seconds. The travel time of the actual operating mechanism can be satisfied.
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 (8)
1. A software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit is characterized by comprising:
the electronic circuit drives the power electric circuit, the insulated gate bipolar transistor and the peripheral driving circuit are adopted for control, and the switching-off control is driven reliably by two groups of IGBTs;
the isolating switch opening and closing stoping circuit;
the digital circuit extraction circuit adopts a bidirectional optocoupler isolation mode and a piezoresistor to carry out EMC surge and pulse group protection mode on a conditioning circuit acquired at the front end;
the analog signal is recovered, and a linear circuit sensor chip is adopted in a circuit of a loop where the disconnecting contact and the closing contact of the isolating switch are positioned;
the communication PCB circuit board-mother PCB circuit board-control PCB circuit board 4U two-slot mode adopts a mode of multiplexing a plurality of groups of signal lines, multiplexing a plurality of groups of external circuit interfaces for miniaturization, and integrating the monitoring units;
software locking, namely configuring the address and the state of remote signaling by the high 8 bits and configuring the address and the executed action of a remote control signal by the low 8 bits in a mode that a configuration file is powered off and is not lost;
the local control hardware is locked, the hardware is locked in the mode of interlocking an exclusive-or gate and an AND gate realization button, the priority is the same as that of the software locking, and the isolation switch can be switched on and off only when the hardware locking condition and the software locking condition are met;
the remote control hardware is locked, and the aim of controlling by using MCU or using a mechanical button is fulfilled by gating different CMOS chips;
the hardware locking delay local control and the remote control require that the disconnecting delay locking logic of the isolating switch meets certain conditions;
the disconnecting delay locking logic of the isolating switch needs to meet 4 conditions: (1) the mechanical button conditioning circuit outputs low level of a switching-on button IGBT1/IGBT 2; (2) the change-over switch is switched to the change-over switch to output a low level; (3) the externally latched signal outputs a low level; (4) the mechanical button of the screen cabinet or the mechanical button of the monitoring unit outputs high level, and the opening button outputs low level after passing through the inverter; which satisfies the following logic formula: output y= (1) + (2) + (3) + (4).
2. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the composite power semiconductor device consists of BJT and MOSFET, and the gate driving is controlled by the driving power supply and the input control signal, and finally the contacts of the switching-on and switching-off output are controlled.
3. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: if and only if both are driven, the output is DC220V, and the control of the electric motor is completed; by setting different differential mode and common mode circuits, electromagnetic compatibility is enhanced, and electromagnetic and strong current interference on site is reduced.
4. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the digital circuit extraction circuit adopts 74LVC245 and adopts a time division multiplexing mode, so that the scale of the circuit is reduced.
5. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the conditioning circuit collected at the front end adopts bidirectional optocoupler isolation and adopts piezoresistors to carry out the protection of EMC surge and pulse groups.
6. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the analog signal is extracted; the circuit of the loop where the disconnecting contact and the closing contact of the isolating switch are positioned adopts a linear circuit sensor chip and is characterized in that the circuit is formed by a formula V ADC_1 ＝3.3/2+0.066*I 220V The loop pushes out the current of the 220V loop by combining the acquired voltage of the ADC 1; when I>I Motor limit When the software is subjected to overcurrent speed breaking, the isolating switch is disconnected to switch on and off, and the power supply voltage DC220 of the motor is cut off; the limit current of the motor can be configured according to different actual motor models.
7. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the logic of the isolating switch switching-on drivable output has four cases in total; if and only if V Button switch-on ＝H，V Button switch-on When=l, the contact of the switch can be driven.
8. The software and hardware locking integrated direct control overhead line system isolating switch 4U monitoring unit according to claim 1, wherein: the dial-up processing mode is adopted, different resistors are combined to replace the effect of a large time relay, and meanwhile, the cost is reduced.
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