CN114203483A - Method for realizing backup control of aviation contactor - Google Patents
Method for realizing backup control of aviation contactor Download PDFInfo
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- CN114203483A CN114203483A CN202111425194.6A CN202111425194A CN114203483A CN 114203483 A CN114203483 A CN 114203483A CN 202111425194 A CN202111425194 A CN 202111425194A CN 114203483 A CN114203483 A CN 114203483A
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- controller
- contactor
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- power supply
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The invention provides a method for realizing backup control of an aviation contactor, which adopts two controllers to respectively realize the monitoring and protection functions of a left power supply channel and a right power supply channel of an aviation alternating current power supply system, two alternating current connection contactors in the aviation alternating current power supply system adopt a backup control mode, the two controllers have the same software control function and hardware drive circuit, collect the same external voltage, current and contactor state signals, and output corresponding contactor control commands through set power supply logic and a fault protection algorithm; the first controller is a main controller, the second controller is an auxiliary controller, the first controller is used for controlling the on and off of the two alternating current connecting contactors under a normal condition, and the second controller is used as a backup control unit and is used for controlling the actions of the two alternating current connecting contactors under the condition that the first controller fails. The invention reduces the influence of the controller fault on the whole power distribution system and improves the safety and reliability of the system.
Description
Technical Field
The invention belongs to the technical field of aviation power distribution, and particularly relates to a backup control method for an alternating current contactor by a controller in an aviation power distribution system.
Background
In the field of aviation power supply systems, with the great increase of airborne electric equipment, the requirement on the quality of electric energy is higher and higher, and the status and the function of an aircraft power distribution system are more and more important. The power distribution system of an aircraft must not only provide sufficient capacity, but also ensure high reliability of the power supply, especially on civil aircraft.
In an aviation power distribution system, an alternating current contactor is an automatic control switch applied to remotely control the on-off of an alternating current main circuit, and the functions of connecting an alternating current power supply into a power grid, quitting the power grid or reconstructing the state of the power grid and the like are realized. At present, a control method for an alternating current contactor generally adopts a single controller for control, and is characterized by simplicity, but if a controller fails, the contactor cannot be effectively controlled, and even normal operation of the whole power distribution system is influenced, so that a backup control method is generally adopted for some key contactors in the power distribution system in order to improve the safety and reliability of the system.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for realizing backup control of an aviation contactor, which adopts two controllers to respectively realize the monitoring and protecting functions of a left power supply channel and a right power supply channel of an aviation alternating-current power supply system, and is characterized in that: for two alternating current connecting contactors in an aviation alternating current power supply system, two controllers adopt a backup control mode, have the same software control function and hardware drive circuits, acquire the same external voltage, current and contactor state signals, and output corresponding contactor control commands through set power supply logic and a fault protection algorithm; the first controller is a main controller, the second controller is an auxiliary controller, the first controller is used for controlling the on and off of the two alternating current connecting contactors under a normal condition, and the second controller is used as a backup control unit and is used for controlling the actions of the two alternating current connecting contactors under the condition that the first controller fails.
Furthermore, a prohibition module is added in the software of the second controller to realize backup control; under normal conditions, the control commands of the two alternating current connection contactors output by the first controller are valid and output to the contactors to execute corresponding actions, and the control commands of the second controller are forbidden by the forbidding module and are not allowed to be output to the contactors; under the condition that the first controller fails, the heartbeat signal sent by the first controller to the second controller disappears, the forbidding module of the second controller fails, the control commands of the two alternating current connecting contactors are effectively output, and the normal operation of the system is guaranteed.
Furthermore, the heartbeat signal is a high-level effective signal generated when the controllers work normally, and the two controllers send heartbeat signals to each other so that the two controllers know respective working states; when one controller fails, the heartbeat signal goes low, and the other controller knows that the controller fails by collecting the state.
Furthermore, the two controllers collect signals of a plus end of a contactor sent by a generator control device in the aviation alternating-current power supply system as control conditions, the two controllers adopt the same first pin to input the signals of the plus end of the contactor, the interface of the first controller is subjected to a branching design, the second pin of the first controller is short-circuited to the first pin of the first controller and is output to the first pin of the second controller from the second pin of the first controller, and the second pin of the second controller is suspended without any input.
Furthermore, a control command of the "-" end of the contactor is output by the controller and is connected to the "-" end of the coil of the contactor, the two controllers output the control command of the "-" end from the third pin and are connected to the coil of the contactor in parallel, and output ports of the two controllers are both short-circuit protected by diodes.
Furthermore, the two controllers acquire the output signals of the auxiliary contacts of the contactor through the fourth pin, wherein the two groups of auxiliary contacts of the contactor are used for being respectively input to the two controllers, if one controller outputs an instruction error due to the fault of one group of auxiliary contacts, the other controller can correctly output a control instruction when taking over, and the common-mode fault caused by the auxiliary contacts is prevented.
Furthermore, hardware and interfaces of the two controllers are identical, software is compatible with control functions of the left channel and the right channel, and the left power supply channel or the right power supply channel of the aviation alternating-current power supply system is identified through the 4 ID pins so as to execute functions of the first controller or the second controller.
Advantageous effects
The backup control of the contactor is designed aiming at the key contactor in the power supply system, because the control of the contactors is important in the system state conversion, by adopting the method provided by the invention, the backup control of the key contactor enables the backup controller to completely take over the control command output of the corresponding contactor under the condition that the main controller fails, the influence of the controller failure on the whole power distribution system is reduced, and the safety and the reliability of the system are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a contactor backup control;
FIG. 2 is a schematic diagram of a "+" input signal interface of the contactor;
FIG. 3 is a schematic diagram of a "-" terminal output interface of the contactor;
fig. 4 is a schematic diagram of an auxiliary contact acquisition interface of a contactor.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, and not to be construed as limiting the invention.
In the aviation distribution system, some key alternating current contactor power supply system state conversion and whether can take place that alternating current power supply connects in parallel and play crucial effect, if adopt single controller to control, the fault incidence is higher, can not accomplish normal power supply system state conversion, can take place the parallelly connected major failure of power supply system even, can not satisfy distribution system's security, the reliability requirement, the event adopts dual controller to carry out backup control, guarantee also not to influence the effective control of key contactor under the single controller trouble condition, improve whole distribution system's security, reliability.
The invention is based on the AC power system configuration of a certain civil aircraft, the system comprises two controllers which respectively realize the monitoring and protection functions of a left power supply channel and a right power supply channel, the hardware and the interfaces of the two controllers are completely the same, the software is compatible with the control functions of the left channel and the right channel, and the functions of the controller 1 or the controller 2 are executed by identifying whether the two controllers are positioned in the left power supply channel or the right power supply channel through 4 ID pins.
The system has 6 contactors in total, in order to realize the reliable control of the contactors, the two controllers are used for controlling the contactors, and respectively control the contactors of a left channel and a right channel in the power distribution system, but for two important alternating current connection contactors, the two controllers have the same software control function and hardware drive circuits, and the difference is that the controller 1 is a main controller, the controller 2 is an auxiliary controller, and a prohibition module is arranged in the software of the auxiliary controller for backup control.
Fig. 1 shows two ac connection contacts: the backup control schematic diagram of the contactor 1 and the contactor 2, wherein the controller 1 is used as a main control unit, the controller 1 controls the on and off of the two contactors under a normal condition, the controller 2 is used as a backup control unit, and the actions of the two contactors are controlled under the condition that the controller 1 has a fault, so that the fault of the main controller cannot have any influence on a power supply system.
The controller 1 and the controller 2 have the same contactor hardware driving circuit and are connected in parallel through 2 diodes.
The controller 1 and the controller 2 need to acquire the same external voltage, current and contactor state signals to realize backup control of the contactor, and output corresponding contactor control commands through set power supply logic and fault protection algorithms. Under normal conditions, the control commands of the contactor 1 and the contactor 2 output by the controller 1 are valid and output to the contactor to execute corresponding actions, and the control commands of the controller 2 are forbidden through the forbidding module and are not allowed to be output to the contactor. However, under the condition that the controller 1 fails, the heartbeat signal sent by the controller 1 to the controller 2 disappears, the prohibition module of the controller 2 fails, and the control commands of the two contactors are effectively output, so that the normal operation of the system is ensured.
The heartbeat signal is a high effective level signal when the controllers work normally, and the two controllers send the signal to each other so as to make the respective working states known to each other. When one controller fails, the heartbeat signal goes low, and the other controller knows that the controller fails by collecting the state. There are three kinds of fault conditions of the controller, processor program run-off, watchdog failure or output control logic error, etc. The design of the backup control of the key contactors enables one controller to take over the effective control of the two key contactors under the condition of a fault, so that the normal state conversion of a power distribution system is ensured, and the occurrence of the parallel fault of the alternating-current power supply is prevented.
In order to realize the interchangeability of the two controllers and ensure that the hardware interfaces are completely the same, the 3 types of input and output signal interfaces related to the backup control of the contactor are designed as follows:
the controller needs to acquire signals of a "+" terminal of a contactor sent by generator control equipment in the system as control conditions, and the signals are input by adopting the same first pin, as shown in fig. 2. Because the output interface of the generator control equipment is only one, in order to provide for two controllers, a branching design is carried out on the interface of the controller 1, a second pin of the controller 1 is short-circuited to a first pin of the controller 1 and is output to a first pin of the controller 2 from the second pin of the controller 1, and a second pin of the controller 2 is suspended without any input.
The control command of the "-" end of the contactor is output by the controller and is connected to the "-" end of the coil of the contactor, and the two controllers are output from the third pin and are connected to the coil of the contactor in parallel, but the output port needs to use a diode for short-circuit protection, as shown in figure 3.
The acquisition of the controller to the auxiliary contacts of the contactor is shown in fig. 4, the acquisition interfaces of the two bus bar power controllers are all fourth pins, but in order to ensure the accuracy of information acquisition, two groups of auxiliary contacts of the contactor are used to be respectively input to the two controllers, if one group of auxiliary contacts fails to cause the error of the output instruction of one controller, the other controller can correctly output the control instruction when taking over, and the common mode fault caused by the auxiliary contacts is prevented.
Tests prove that by adopting the method and the device, when the main controller fails, the backup controller can correctly output the control command of the key alternating current connecting contactor, so that the normal operation of a power distribution system is ensured, the occurrence rate of the parallel fault of the alternating current power supply is reduced, and the system safety is improved.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (7)
1. A method for realizing backup control of an aviation contactor adopts two controllers to respectively realize the monitoring and protection functions of a left power supply channel and a right power supply channel of an aviation alternating-current power supply system, and is characterized in that: for two alternating current connecting contactors in an aviation alternating current power supply system, two controllers adopt a backup control mode, have the same software control function and hardware drive circuits, acquire the same external voltage, current and contactor state signals, and output corresponding contactor control commands through set power supply logic and a fault protection algorithm; the first controller is a main controller, the second controller is an auxiliary controller, the first controller is used for controlling the on and off of the two alternating current connecting contactors under a normal condition, and the second controller is used as a backup control unit and is used for controlling the actions of the two alternating current connecting contactors under the condition that the first controller fails.
2. The method for realizing backup control of the aviation contactor as claimed in claim 1, wherein the method comprises the following steps: a prohibition module is additionally arranged in the software of the second controller to realize backup control; under normal conditions, the control commands of the two alternating current connection contactors output by the first controller are valid and output to the contactors to execute corresponding actions, and the control commands of the second controller are forbidden by the forbidding module and are not allowed to be output to the contactors; under the condition that the first controller fails, the heartbeat signal sent by the first controller to the second controller disappears, the forbidding module of the second controller fails, the control commands of the two alternating current connecting contactors are effectively output, and the normal operation of the system is guaranteed.
3. The method for realizing backup control of the aviation contactor as claimed in claim 2, wherein the method comprises the following steps: the heartbeat signal is a high-level effective signal generated when the controllers work normally, and the two controllers send heartbeat signals to each other so that the two controllers know respective working states; when one controller fails, the heartbeat signal goes low, and the other controller knows that the controller fails by collecting the state.
4. The method for realizing backup control of the aviation contactor as claimed in claim 1, wherein the method comprises the following steps: the two controllers collect signals of a plus end of a contactor sent by generator control equipment in an aviation alternating current power supply system as control conditions, the two controllers adopt the same first pin to input the signals of the plus end of the contactor, the interface of the first controller is designed in a branching mode, the second pin of the first controller is short-circuited to the first pin of the first controller and is output to the first pin of the second controller from the second pin of the first controller, and the second pin of the second controller is suspended and has no input.
5. The method for realizing backup control of the aviation contactor as claimed in claim 1, wherein the method comprises the following steps: and the output ports of the two controllers are connected in parallel to the contactor coil, and the output ports of the two controllers are both short-circuit protected by using diodes.
6. The method for realizing backup control of the aviation contactor as claimed in claim 1, wherein the method comprises the following steps: the two controllers acquire the output signals of the auxiliary contacts of the contactor through the fourth pin, wherein the two groups of auxiliary contacts of the contactor are used for being respectively input to the two controllers, if one of the controllers outputs wrong instructions due to the fault of one group of auxiliary contacts, the other controller can correctly output control instructions when taking over, and the common-mode fault caused by the auxiliary contacts is prevented.
7. The method for realizing backup control of the aviation contactor as claimed in claim 1, wherein the method comprises the following steps: hardware and interfaces of the two controllers are identical, software is compatible with control functions of the left channel and the right channel, and the left power supply channel or the right power supply channel of the aviation alternating-current power supply system is identified through the 4 ID pins so as to execute functions of the first controller or the second controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111425194.6A CN114203483A (en) | 2021-11-27 | 2021-11-27 | Method for realizing backup control of aviation contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111425194.6A CN114203483A (en) | 2021-11-27 | 2021-11-27 | Method for realizing backup control of aviation contactor |
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| CN114203483A true CN114203483A (en) | 2022-03-18 |
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| CN202111425194.6A Pending CN114203483A (en) | 2021-11-27 | 2021-11-27 | Method for realizing backup control of aviation contactor |
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| DE102007001576A1 (en) * | 2006-01-13 | 2007-09-20 | Emerson Process Management Power & Water Solutions, Inc. | Method of synchronizing redundant controllers for bumpless failover under normal conditions and mismatch |
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| CN111261458A (en) * | 2020-03-08 | 2020-06-09 | 陕西航空电气有限责任公司 | Contactor control method adopting non-similar dual processors in aviation power distribution system |
| CN212459878U (en) * | 2020-03-11 | 2021-02-02 | 厦门海润集装箱码头有限公司 | Current collection dolly carbon brush detection circuitry that falls based on level four contactor |
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2021
- 2021-11-27 CN CN202111425194.6A patent/CN114203483A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001576A1 (en) * | 2006-01-13 | 2007-09-20 | Emerson Process Management Power & Water Solutions, Inc. | Method of synchronizing redundant controllers for bumpless failover under normal conditions and mismatch |
| CN104678757A (en) * | 2013-12-02 | 2015-06-03 | 景德镇昌航航空高新技术有限责任公司 | Helicopter engine dual-redundancy fuel oil regulation controller |
| CN105278516A (en) * | 2014-06-24 | 2016-01-27 | 南京理工大学 | Double-redundancy switch value PLC control system reliable fault-tolerant controller realization method |
| CN105259863A (en) * | 2015-10-30 | 2016-01-20 | 北京航天自动控制研究所 | PLC warm backup redundancy method and system |
| CN105549424A (en) * | 2016-01-06 | 2016-05-04 | 南京航空航天大学 | Wide-body passenger plane busbar power controller simulation system and method |
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| CN111261458A (en) * | 2020-03-08 | 2020-06-09 | 陕西航空电气有限责任公司 | Contactor control method adopting non-similar dual processors in aviation power distribution system |
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