CN113629873B - Contact net isolator monitoring unit based on IGBT is realized - Google Patents
Contact net isolator monitoring unit based on IGBT is realized Download PDFInfo
- Publication number
- CN113629873B CN113629873B CN202110935232.6A CN202110935232A CN113629873B CN 113629873 B CN113629873 B CN 113629873B CN 202110935232 A CN202110935232 A CN 202110935232A CN 113629873 B CN113629873 B CN 113629873B
- Authority
- CN
- China
- Prior art keywords
- igbt
- isolating switch
- output
- main cpu
- monitoring unit
- 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.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 41
- 230000011664 signaling Effects 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 30
- 230000001960 triggered effect Effects 0.000 claims description 29
- 238000002955 isolation Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 8
- 238000007726 management method Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Abstract
The invention belongs to the field of traction power supply of overhead contact systems, and particularly provides an overhead contact system isolating switch monitoring unit based on IGBT, which comprises the following components: the remote control system comprises a main CPU, a communication processing circuit, a remote signaling acquisition circuit, a remote control processing circuit, an auxiliary CPU and an IGBT driving circuit; the main CPU is communicated with the communication management unit through the communication processing circuit, controls the remote signaling acquisition circuit to periodically acquire a state signal of the switching equipment, and remotely controls the external equipment through the remote control processing circuit; the auxiliary CPU is used for receiving a control signal output by the main CPU so as to control the IGBT driving circuit to drive the isolating switch to realize power transmission or power failure of the contact network. By eliminating peripheral consumables, peripheral electric circuits are thoroughly simplified, the number of connecting nodes is reduced, signal transmission links are reduced, and the safety and success rate of isolating switch driving are improved; and the switch position signals transmitted by the isolating switch are directly collected, the previous signal conversion links are reduced, the failure rate of signal collection is reduced, and the state acquisition and the switching-on and switching-off control of the isolating switch are completed.
Description
Technical Field
The invention relates to the field of traction power supply of overhead contact systems, in particular to an overhead contact system isolating switch monitoring unit based on IGBT.
Background
The current implementation schemes of the contact network isolating switch monitoring unit can be generally divided into two types: 1. optical fiber type; 2. direct control type. The optical fiber implementation scheme refers to communication management equipment placed in a traction station, an AT station or a zoning station, and the monitoring units in the isolating switch mechanism boxes along the contact network interact with each other through optical fibers to complete the state acquisition and the switching-on and switching-off control of the isolating switch; the direct control implementation scheme is that communication management equipment and monitoring unit equipment are arranged in a traction station, an AT station or a partition station, and control wires and state wires of the isolating switch mechanism are connected into related equipment in the traction station through cables to complete isolating switch state acquisition and switching-on and switching-off control.
The direct control type implementation scheme is a current mainstream implementation scheme, a contact net only keeps a purely mechanical isolating switch operating mechanism with strong anti-interference capability and extremely low fault rate along the line, a monitoring unit related to data communication and logic judgment is arranged in a place with a relatively high working environment and an electromagnetic environment, the operating mechanism is directly driven by direct current and the state of the operating mechanism is read back, and in this way, the current state of the contact net isolating switch can be directly obtained in the place, and corresponding control is performed.
Direct control formula uses direct current to carry out direct control to operating device, because the electric current is great, and ordinary relay can't satisfy the application requirement, and previous implementation scheme generally adopts the contactor to carry out indirect control and signal reading, and the external supplementary consumptive material of monitor unit is more, and electric circuit is complicated, and has increased implementation cost.
Disclosure of Invention
The invention aims at the technical problems of more external consumables, complex electric circuit and higher cost of the direct control type contact net isolating switch monitoring unit in the prior art.
According to a first aspect of the present invention, there is provided an IGBT-based implementation of a contact net disconnector monitoring unit, comprising: the remote control system comprises a main CPU, a communication processing circuit, a remote signaling acquisition circuit, a remote control processing circuit, an auxiliary CPU and an IGBT driving circuit;
the main CPU is communicated with the communication management unit through the communication processing circuit, controls the remote signaling acquisition circuit to periodically acquire a state signal of the switching equipment, and remotely controls the external equipment through the remote control processing circuit;
the auxiliary CPU is used for receiving the control signal output by the main CPU so as to control the IGBT driving circuit to drive the isolating switch to act, and the contact net isolation control is realized.
Optionally, all communication interfaces of the monitoring unit adopt isolation communication chips or isolation devices to realize signal electrical isolation.
Optionally, the remote signaling acquisition circuit inputs the remote signaling signal to the main CPU through the optocoupler isolation after passing through the zener diode, the main CPU periodically scans the corresponding remote signaling input port, and performs software jitter elimination on the remote signaling signal generating the deflection, thereby completing the acquisition of the remote signaling signal.
Optionally, the monitoring unit further includes a mode selection switch, when the mode selection switch is in a tele-motion state, a control signal triggered by the main CPU is valid to trigger the auxiliary CPU to drive the isolating switch to output, and at the moment, the control signal triggered by the button is invalid; when the mode selection switch is in an on-site state, a control signal triggered by the button is effective to trigger the auxiliary CPU to drive the isolating switch to output, and a control signal triggered by the main CPU is ineffective; when the mode selection switch is in the disabled state, the control signal triggered by the main CPU and the control signal triggered by the button are both disabled.
Optionally, the state signal of the isolating switch is subjected to voltage dependent resistor, self-recovery insurance and TVS protection, is subjected to current limiting, voltage division by a voltage dividing resistor and optical coupling isolation, is buffered by a Schmidt trigger input inverter, and is input to a main CPU to complete state acquisition.
Optionally, in the two-wire control mode, the state signal of the isolating switch and the control signal output by the main CPU are transmitted in a time-sharing multiplexing mode.
Optionally, in the two-wire control mode, the main CPU reads the status signal of the isolating switch specifically includes: firstly, outputting a high level subjected to current limiting on a positive electrode line driven by an isolating switch, checking a related remote signaling state of the isolating switch, and canceling the high level output; then, outputting the high level subjected to current limiting on a drive negative line of the isolating switch, checking the related remote signaling state of the isolating switch, and canceling the high level output; wherein the high level is insufficient to drive the disconnector into operation.
Optionally, the auxiliary CPU periodically reads the overcurrent threshold and the on-off output time limit of the panel configuration, controls the output of the IGBT circuit after receiving the control signal triggered by the main CPU or the button, and collects the output current in real time, and when the output current is greater than the configuration current of the panel, immediately turns off the output of the IGBT, thereby preventing the motor of the isolating switch from being damaged; if the output current is normal, continuing to output until the output time limit of the panel configuration is reached, closing the IGBT output, and finishing the drive control of the isolating switch.
Optionally, the remote control processing circuit adopts a relay scheme, the contact capacity is AC220V 5A/DC30V 5A, and the remote control processing circuit outputs in a dry contact mode.
Optionally, an external blocking signal is connected to the IGBT driving circuit to control gating of the IGBT driver; when the blocking signal is valid, +3.3VB in the IGBT driving circuit is unpowered, and the IGBT driver does not output; when the blocking signal is invalid, +3.3VB in the IGBT driving circuit is electrified, and when the auxiliary CPU control signal is valid, the IGBT driver is gated, and the IGBT driver drives output.
The beneficial effects are that: the invention provides a contact net isolating switch monitoring unit based on IGBT, comprising: the remote control system comprises a main CPU, a communication processing circuit, a remote signaling acquisition circuit, a remote control processing circuit, an auxiliary CPU and an IGBT driving circuit; the main CPU is communicated with the communication management unit through the communication processing circuit, controls the remote signaling acquisition circuit to periodically acquire a state signal of the switching equipment, and remotely controls the external equipment through the remote control processing circuit; the auxiliary CPU is used for receiving a control signal output by the main CPU so as to control the IGBT driving circuit to drive the isolating switch to realize power transmission or power failure of the contact network. By eliminating peripheral consumables, peripheral electric circuits are thoroughly simplified, the number of connecting nodes is reduced, signal transmission links are reduced, and the safety and success rate of isolating switch driving are improved; and the switch position signals transmitted by the isolating switch are directly collected, the previous signal conversion links are reduced, the failure rate of signal collection is reduced, and the state acquisition and the switching-on and switching-off control of the isolating switch are completed.
Drawings
Fig. 1 is a structural block diagram of a contact net isolating switch monitoring unit based on an IGBT;
fig. 2 is a schematic wiring diagram of a contact net isolating switch monitoring unit based on an IGBT implementation provided by the invention;
fig. 3 is a schematic diagram of a signal flow chart of a driving isolating switch of a contact net isolating switch monitoring unit based on an IGBT implementation provided by the invention;
fig. 4 is a schematic diagram of a main CPU circuit of a contact net isolating switch monitoring unit based on an IGBT implementation provided by the present invention;
fig. 5 is a schematic diagram of remote signaling processing of a contact network isolating switch monitoring unit based on an IGBT implementation provided by the invention;
fig. 6 is a schematic diagram of an auxiliary CPU circuit of a contact net isolating switch monitoring unit based on an IGBT implementation according to the present invention;
fig. 7 is an IGBT driving schematic diagram of the overhead line system isolating switch monitoring unit based on the IGBT implementation according to the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to 7, an embodiment of the present invention provides a contact net isolating switch monitoring unit implemented based on an IGBT, including: the remote control system comprises a main CPU, a communication processing circuit, a remote signaling acquisition circuit, a remote control processing circuit, an auxiliary CPU and an IGBT driving circuit; the main CPU is communicated with the communication management unit through the communication processing circuit, controls the remote signaling acquisition circuit to periodically acquire a state signal of the switching equipment, and remotely controls the external equipment through the remote control processing circuit; the auxiliary CPU is used for receiving control signals output by the main CPU to control the IGBT driving circuit to drive the isolating switch to realize power transmission and power failure of the contact network, namely, the IGBT driving circuit is controlled to drive the isolating switch to act, and the contact network isolation control is realized. By eliminating peripheral consumables, peripheral electric circuits are thoroughly simplified, the number of connecting nodes is reduced, signal transmission links are reduced, and the safety and success rate of isolating switch driving are improved; and the switch position signals transmitted by the isolating switch are directly collected, the previous signal conversion links are reduced, the failure rate of signal collection is reduced, and the state acquisition and the switching-on and switching-off control of the isolating switch are completed.
Optionally, the monitoring unit further includes a mode selection switch, when the mode selection switch is in a tele-motion state, a control signal triggered by the main CPU is valid to trigger the auxiliary CPU to drive the isolating switch to output, and at this time, the control signal triggered by the button is invalid; when the mode selection switch is in an on-site state, a control signal triggered by the button is effective to trigger the auxiliary CPU to drive the isolating switch to output, and a control signal triggered by the main CPU is ineffective; when the mode selection switch is in the disabled state, the control signal triggered by the main CPU and the control signal triggered by the button are both disabled.
The mode selection switch is controlled to select a corresponding state through a local trigger signal: remote, prohibited, or local. Then an external locking signal is accessed, and if the locking signal is valid, the action cancellation is finished. If the locking signal is invalid, the auxiliary CPU controls and drives the IGBT circuit to output so as to realize contact net isolation. Meanwhile, through the output overcurrent self-test, if overcurrent occurs, the action is canceled, so that the safety of the circuit is ensured; alternatively, if the operation time is up, the same operation is ended.
Specifically, the working mode of the current equipment can be determined through the mode selection switch, and when the equipment is in the remote working mode, the remote request action signal is valid; when the device is in an in-situ mode of operation, the local button trigger signal is active; when the device is in the disabled state, both other signals are inactive. When the latch signal is active, the operation request signal is inactive. After receiving the action request signal, the CPU reads the driving action time and the overcurrent threshold from the panel, controls the IGBT to be conducted and starts to drive the isolating switch to act; in the process, the CPU reads the driving current in real time, and when the driving current exceeds a set threshold value, the driving output is immediately cut off, so that the motor of the isolating switch is prevented from being damaged; when the driving time reaches the action time set by the panel, the CPU controls the IGBT to stop driving output, and the control operation is completed.
In the direct control scheme, the isolating switch needs to be driven by using DC220V, the maximum current can reach about 8A, the traditional relay contact capacity is generally AC220V 5A/DC30V 5A, and the direct current driving voltage and current can not meet the driving requirement of the isolating switch. In the present invention, an IGBT is used as a driving device of the isolation switch. As shown in fig. 7.
The igbt_hz is a closing control signal, and after the switching-on control signal is inverted by the three-stage transistors CQ3 and CQ4, the IGBT drivers U29 and U32 are controlled to act, and then the IGBT modules U28 and U31 are controlled to be turned on; after the U28 is conducted, the DC220V positive electrode can be directly output to the positive electrode of the isolating switch motor, and the output circuit is connected with the current sensor U30 in series, so that the CPU can collect output current in real time, and when the isolating switch motor is blocked or fails, the driving output is immediately cut off, and further damage of the isolating switch motor is avoided; after U31 switches on, DC220V negative pole switches on with isolator motor negative pole, accomplishes the drive backward flow, realizes the isolator drive closed loop.
The above is the implementation principle of the switching-on action of the driving isolating switch, and the implementation principle of the switching-off action of the driving isolating switch is similar to that of the previous figure and is not repeated.
Besides the isolating switch driving circuit, the invention combines the remote control with the on-site control, not only supports the communication manager to remotely control the action of the isolating switch driving circuit through a communication message, but also can be switched to the on-site working state through a mode knob on the equipment panel, and the on-off switch button on the device panel is used for locally controlling the action of the isolating switch driving circuit, thereby being convenient for daily maintenance and overhaul.
Alternatively, the external blocking signal is connected to the IGBT driving circuit to control the gating of the IGBT driver; when the blocking signal is valid, +3.3VB in the IGBT driving circuit is unpowered, and the IGBT driver does not output; when the blocking signal is invalid, +3.3VB in the IGBT driving circuit is electrified, and when the auxiliary CPU control signal is valid, the IGBT driver is gated, and the IGBT driver normally drives and outputs. The locking signal input is supported, and when the locking signal is effective, any driving action of the isolating switch cannot be effective.
Alternatively, the monitoring unit supports driving the disconnector using a two-wire mode and reading the disconnector state. The realization of the direct control scheme requires that a driving cable and a signal cable of the isolating switch are led into the house from the contact network along the line, the distance is far, and the cable cost is increased. To solve this problem, a common solution is to transmit the isolating switch signal through the driving cable, and use one of the on-off driving cables as a common line, and use three cables in total to realize the action driving and signal reading of the isolating switch. The isolating switch is driven by using a two-wire mode, and the isolating switch state is read, so that the functions are realized in a time-sharing multiplexing mode: when the isolating switch is driven to act, the state of the isolating switch is not collected; and after the action of the isolating switch is finished, judging the current state of the isolating switch by loading positive and negative signals on the driving circuit.
In a specific implementation scenario, the monitoring unit comprises: the remote control system comprises a main CPU circuit, a communication circuit, a remote signaling acquisition circuit, a universal remote control output circuit, an auxiliary CPU circuit, an isolating switch driving circuit and an isolating switch state acquisition circuit. The main CPU circuit is responsible for realizing the main body functions of the monitoring unit, including data communication with communication management equipment (communication management unit, english full name Intelligent Communication Gateway, chinese full name communication manager), remote signaling state acquisition, remote control output, other logic control and the like. Supporting various communication modes, including an ETH network interface, a CAN bus interface, an RS485 bus interface and a CONSOLE maintenance interface, and matching various communication manager interface types; the CPU is externally provided with an SPI serial FLASH and is used for storing information such as equipment operation parameters, log records and the like; and an external I2C interface RTC (real-time clock) ensures the accuracy of the system clock.
In an alternative scheme, all communication interfaces adopt isolation communication chips or isolation devices to realize signal electrical isolation; the TVS device and the self-recovery insurance are added between the communication bus and the ground, so that the anti-interference and anti-surge capabilities of the communication interface are improved, and the stability of communication and the correctness of communication messages are ensured.
In an alternative scheme, the remote signaling acquisition circuit adopts DC24V remote signaling as a general remote signaling acquisition point to complete signal acquisition and state monitoring of some switch equipment; after the signal is input, EMC protection of the signal input is finished through self-recovery insurance and TVS; after passing through the voltage stabilizing diode, remote signaling signals are input to a main CPU through optical coupling isolation; the main CPU periodically scans the corresponding remote signaling input ports, and performs software jitter elimination on the remote signaling signals generating the displacement to complete the acquisition of the remote signaling signals.
Alternatively, the remote control processing circuit, namely the universal remote control output, adopts a common relay scheme, and the contact capacity AC220V 5A/DC30V 5A is output in a dry contact mode, so that the universal remote control output function is completed. The main CPU receives a remote control operation instruction through the communication processing circuit and performs the remote control operation in a mode of selecting before executing, and after receiving the selection instruction sent by the communication management machine, the monitoring unit gates a passage from the relay coil to the ground, reads back a control output state and ensures correct output, and at the moment, the relay is not powered and cannot act; after receiving an execution instruction sent by the communication manager, powering the relay by gating the power relay, and sucking the relay; and after the relay suction time reaches the configured time limit, the CPU controls the power relay and the output relay to stop outputting, and the remote control output is completed.
In an alternative scheme, the auxiliary CPU circuit mainly completes the drive output control of the isolating switch. The auxiliary CPU periodically reads the overcurrent threshold and the switching-on/off output time limit of panel configuration, controls the output of the IGBT circuit after receiving a control signal triggered by the main CPU or a button, acquires output current in real time, and immediately turns off the output of the IGBT when the output current is greater than the configuration current of the panel, so as to prevent the motor of the isolating switch from being damaged; if the output current is normal, continuing to output until the output time limit of the panel configuration is reached, closing the IGBT output, and finishing the drive control of the isolating switch.
The input configuration can be carried out through a panel by manually presetting an overcurrent threshold and an on-off output time limit.
The tele-trigger or button-trigger control signal may be enabled or disabled by a mode selection switch on the panel. When the mode selection switch is in a tele-motion state, a control signal triggered by the main CPU is effective, the auxiliary CPU can be triggered to drive the isolating switch to output, and a control signal triggered by the button is ineffective; when the mode selection switch is in an on-site state, a control signal triggered by the button is effective, so that the auxiliary CPU can be triggered to drive the isolating switch to output, and the control signal triggered by the main CPU is ineffective; when the mode selection switch is in the disabled state, the control signal triggered by the main CPU and the control signal triggered by the button are both disabled.
The latch signal is used to control the IGBT driver gating. As shown in fig. 7, when the latch signal is valid, +3.3vb in the IGBT driving circuit is not powered, the IGBT driver is not output, and the IGBT cannot work normally; when the blocking signal is invalid, +3.3VB in the IGBT driving circuit is electrified, and when the auxiliary CPU control signal is valid, the IGBT driver is gated, and the IGBT driver normally drives and outputs.
When the auxiliary CPU outputs a control signal effectively, the IGBT drivers (U29 and U32) are simultaneously gated, and the IGBT chips (U28 and U31) are simultaneously turned on, so that the positive electrode (DC 220V) and the negative electrode (DC 220 VG) of the isolating switch are driven to be output to the output contact of the monitoring unit, and the isolating switch is driven to act.
In an alternative scheme, the position signal of the isolating switch is subjected to voltage dependent resistor, self-recovery insurance and TVS protection, is subjected to current limiting, voltage division by a voltage dividing resistor and optical coupling isolation, is buffered by a Schmitt trigger input inverter, and is input to a main CPU to complete state acquisition; the remote signaling collection software flow is the same as the DC24V remote signaling collection flow.
The monitoring unit supports driving the isolating switch through two cables and reads back the state of the isolating switch. At this time, the two functions of driving the isolating switch to act and reading the isolating switch state signal are mutually exclusive and time-sharing multiplexing is performed; when the isolated switch state signal is read, two operations are needed, firstly, the high level (insufficient to drive the isolating switch to act) which is subjected to current limiting is output on the positive electrode line driven by the isolating switch, the related remote signaling state of the isolating switch is checked, and the high level output is cancelled; and then outputting the high level which is subjected to current limiting on a negative line driven by the isolating switch, checking the related remote signaling state of the isolating switch, and canceling the high level output. As can be seen from fig. 3, when the isolating switch is in the closing position, the loop direction of the opening passage is conducted, and the loop direction of the closing passage is not conducted; conversely, when the isolating switch is at the opening position, the loop direction of the closing passage is conducted, and the loop direction of the opening passage is not conducted; when the isolating switch is in an out-of-place state, the loop directions of the switching-on path and the switching-off path are conducted. Therefore, the high level which is subjected to current limiting is respectively applied in the positive and negative loop directions, and corresponding signals can be received at the isolating switch state acquisition end, so that the current position state of the isolating switch is judged. The reading of the disconnector state must be performed when the disconnector is not driven, and the operation of the reading of the disconnector state will be suspended when the monitoring unit starts to drive the disconnector.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. Contact net isolator monitoring unit based on IGBT realization, its characterized in that includes: the remote control system comprises a main CPU, a communication processing circuit, a remote signaling acquisition circuit, a remote control processing circuit, an auxiliary CPU and an IGBT driving circuit;
the main CPU is communicated with the communication management unit through the communication processing circuit, controls the remote signaling acquisition circuit to periodically acquire a state signal of the switching equipment, and remotely controls the external equipment through the remote control processing circuit;
the auxiliary CPU is used for receiving a control signal output by the main CPU so as to control the IGBT driving circuit to drive the isolating switch to act, so that the contact net isolation control is realized;
the state signal of the isolating switch is subjected to voltage dependent resistor, self-recovery insurance and TVS protection, is subjected to current limiting, voltage division by a voltage dividing resistor and optical coupling isolation, is buffered by a Schmidt trigger input inverter, and is input to a main CPU to complete state acquisition; in the two-wire control mode, the main CPU reads the state signal of the isolating switch specifically comprises: firstly, outputting a high level subjected to current limiting on a positive electrode line driven by an isolating switch, checking a related remote signaling state of the isolating switch, and canceling the high level output; then, outputting the high level subjected to current limiting on a drive negative line of the isolating switch, checking the related remote signaling state of the isolating switch, and canceling the high level output; wherein the high level is insufficient to drive the disconnector into operation.
2. The contact network isolating switch monitoring unit based on the IGBT of claim 1, wherein all communication interfaces of the monitoring unit adopt isolating communication chips or isolating devices to realize signal electrical isolation.
3. The monitoring unit of the contact network isolating switch based on the IGBT of claim 1, wherein the remote signaling acquisition circuit inputs the remote signaling signals to the main CPU through the optocoupler isolation after passing through the voltage-stabilizing diode, the main CPU periodically scans the corresponding remote signaling input ports, and performs software jitter elimination on the remote signaling signals generating deflection to complete the acquisition of the remote signaling signals.
4. The IGBT-based overhead line system disconnector monitoring unit according to claim 1, characterized in that the monitoring unit further comprises a mode selection switch, when the mode selection switch is in a tele-motion state, the control signal triggered by the main CPU is valid to trigger the auxiliary CPU to drive the disconnector to output, and the control signal triggered by the button is invalid; when the mode selection switch is in an on-site state, a control signal triggered by the button is effective to trigger the auxiliary CPU to drive the isolating switch to output, and a control signal triggered by the main CPU is ineffective; when the mode selection switch is in the disabled state, the control signal triggered by the main CPU and the control signal triggered by the button are both disabled.
5. The overhead line disconnecting switch monitoring unit based on the IGBT of claim 1, wherein in the two-wire control mode, the state signal of the disconnecting switch and the control signal output by the main CPU are transmitted in a time-sharing multiplexing mode.
6. The monitoring unit of the contact network isolating switch based on the IGBT of claim 1, wherein the auxiliary CPU periodically reads the overcurrent threshold and the on-off output time limit of the panel configuration, controls the output of the IGBT circuit after receiving a control signal triggered by the main CPU or the button, and acquires the output current in real time, and when the output current is larger than the configuration current of the panel, the IGBT output is turned off immediately to prevent the isolating switch motor from being damaged; if the output current is normal, continuing to output until the output time limit of the panel configuration is reached, closing the IGBT output, and finishing the drive control of the isolating switch.
7. The contact network isolating switch monitoring unit based on the IGBT of claim 1, wherein the remote control processing circuit adopts a relay scheme, the contact capacity is AC220V 5A/DC30V 5A, and the contact network isolating switch monitoring unit is output in a dry contact mode.
8. The IGBT-based overhead line isolated switch monitoring unit of claim 1 wherein an external latch signal is coupled to the IGBT drive circuit to control IGBT driver gating; when the blocking signal is valid, +3.3VB in the IGBT driving circuit is unpowered, and the IGBT driver does not output; when the blocking signal is invalid, +3.3VB in the IGBT driving circuit is electrified, and when the auxiliary CPU control signal is valid, the IGBT driver is gated, and the IGBT driver drives output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935232.6A CN113629873B (en) | 2021-08-16 | 2021-08-16 | Contact net isolator monitoring unit based on IGBT is realized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110935232.6A CN113629873B (en) | 2021-08-16 | 2021-08-16 | Contact net isolator monitoring unit based on IGBT is realized |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113629873A CN113629873A (en) | 2021-11-09 |
| CN113629873B true CN113629873B (en) | 2024-03-26 |
Family
ID=78385522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110935232.6A Active CN113629873B (en) | 2021-08-16 | 2021-08-16 | Contact net isolator monitoring unit based on IGBT is realized |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113629873B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117040108B (en) * | 2023-07-03 | 2024-04-05 | 北京太格时代电气股份有限公司 | Software and hardware locking integrated direct control contact net isolating switch 4U monitoring unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1838826C (en) * | 1989-12-20 | 1993-08-30 | Борис Евгеньевич Дынькин | Telecontrol unit |
| CN2290136Y (en) * | 1997-03-17 | 1998-09-02 | 罗昌林 | On-off coil protector for circuit braker |
| CN101937204A (en) * | 2010-08-12 | 2011-01-05 | 四川汇友电气有限公司 | Contact gateway switch action monitoring device with microwave radar |
| GB201315469D0 (en) * | 2013-08-30 | 2013-10-16 | Eaton Ind Netherlands Bv | Circuit breaker with hybrid switch |
| CN104345660A (en) * | 2013-08-08 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Remote control starting circuit |
| CN106933135A (en) * | 2015-12-31 | 2017-07-07 | 北京煜能电气有限公司 | A kind of ocs isolating switch power remote monitor terminal |
| CN108336828A (en) * | 2018-05-11 | 2018-07-27 | 四川汇友电气有限公司 | A kind of novel ocs isolating switch and its control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8384363B2 (en) * | 2005-11-11 | 2013-02-26 | L&L Engineering, Llc | Buck DC-to-DC converter and method |
| US9064660B2 (en) * | 2012-03-22 | 2015-06-23 | Technology Logic International Limited | Remote controlled interactive power switch |
-
2021
- 2021-08-16 CN CN202110935232.6A patent/CN113629873B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1838826C (en) * | 1989-12-20 | 1993-08-30 | Борис Евгеньевич Дынькин | Telecontrol unit |
| CN2290136Y (en) * | 1997-03-17 | 1998-09-02 | 罗昌林 | On-off coil protector for circuit braker |
| CN101937204A (en) * | 2010-08-12 | 2011-01-05 | 四川汇友电气有限公司 | Contact gateway switch action monitoring device with microwave radar |
| CN104345660A (en) * | 2013-08-08 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Remote control starting circuit |
| GB201315469D0 (en) * | 2013-08-30 | 2013-10-16 | Eaton Ind Netherlands Bv | Circuit breaker with hybrid switch |
| CN106933135A (en) * | 2015-12-31 | 2017-07-07 | 北京煜能电气有限公司 | A kind of ocs isolating switch power remote monitor terminal |
| CN108336828A (en) * | 2018-05-11 | 2018-07-27 | 四川汇友电气有限公司 | A kind of novel ocs isolating switch and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113629873A (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113629873B (en) | Contact net isolator monitoring unit based on IGBT is realized | |
| CN201805421U (en) | Communication device between direct current (DC) protection systems and DC control systems | |
| CN101662154B (en) | Link control panel of IGBT valve of chain static synchronous compensator | |
| CN203086246U (en) | CAN bus-based ring main unit control system and power grid monitoring system | |
| CN211030355U (en) | Electric tool | |
| CN205375083U (en) | Contact net isolator telemechanical monitor terminal | |
| CN106300665B (en) | A kind of long-distance operating device visualizing distributor breaker trolley | |
| CN216721015U (en) | Device for powering on, starting, stopping and powering off of one-key remote control power station | |
| CN113791563B (en) | Flywheel energy control system, main system and method | |
| CN203025639U (en) | Micro server and power supply system thereof | |
| CN109541933A (en) | Diesel locomotive status monitoring and emergency flight control system and method | |
| CN202587018U (en) | Device for settling problem of signal abnormity of router | |
| CN109301821A (en) | A kind of redundancy switching system of flexible HVDC transmission system | |
| CN212473483U (en) | Input/output device, manual unlocking disc and interval monitoring system | |
| CN110798390B (en) | Communication system and communication method for power supply and distribution system of submarine observation network | |
| CN106160429A (en) | Emergency power supply information transmission system based on fiber-optic signal | |
| CN202103475U (en) | Dual power supply automatic changeover switch control system | |
| CN208477378U (en) | A kind of lithium electricity lawn machine multifunctional control device | |
| CN201619554U (en) | Control device of electrodynamic windscreen wiper | |
| CN207700944U (en) | A kind of intelligentized cabinet protective door | |
| CN207382221U (en) | Impulse generator group electric braking power supply | |
| CN218316264U (en) | Electric vehicle controller circuit system | |
| CN2800624Y (en) | Electronic transformer mutual-input control device | |
| CN217335607U (en) | Remote restarting system for network router of unattended substation | |
| CN212536196U (en) | Fan system and uninterrupted power source |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |