CN103915816A - Dual-redundancy protective device and protection method - Google Patents

Dual-redundancy protective device and protection method Download PDF

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Publication number
CN103915816A
CN103915816A CN201410162436.0A CN201410162436A CN103915816A CN 103915816 A CN103915816 A CN 103915816A CN 201410162436 A CN201410162436 A CN 201410162436A CN 103915816 A CN103915816 A CN 103915816A
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China
Prior art keywords
dsp processor
dual
dsp
cpld chip
signal
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Pending
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CN201410162436.0A
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Chinese (zh)
Inventor
包涌泉
王小进
李世学
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712th Research Institute of CSIC
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712th Research Institute of CSIC
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Priority to CN201410162436.0A priority Critical patent/CN103915816A/en
Publication of CN103915816A publication Critical patent/CN103915816A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to the electric field and relates to a microcomputer protection device of a marine DC electric system, in particular to a dual-redundancy protective device and protection method. The dual-redundancy protective device comprises a kernel microcomputer unit, a CPLD chip, a relay and an optically coupled isolator, wherein the kernel microcomputer unit is used for processing main circuit current signals sampled from a shunt, carrying out calculation and outputting actuating signals obtained through calculation when a main circuit meets fault actuating conditions; the CPLD chip is used for receiving the actuating signals output by the kernel microcomputer unit and sending out control signals according to the actuating signals; the relay and the optically coupled isolator are connected in sequence; the optically coupled isolator is connected with the CPLD chip, the control signals sent by the CPLD chip drive the relay to switch on a coil of a tripping device after optically coupled isolation so as to enable a breaker to act, and then the main circuit is disconnected. The dual-redundancy protective device is good in anti-electromagnetic interference capacity, high in reliability and especially applicable to the marine DC electric system requiring high reliability.

Description

Dual-computer redundancy protective device and guard method
Technical field
The invention belongs to electric field, is a kind of direct current power system microcomputer protecting device peculiar to vessel, especially relates to dual-computer redundancy protective device and guard method.
Background technology
DC circuit breaker is a kind of important appliance switch in direct current power system.In the time that the fault such as overcurrent, short circuit appears in loop, it is cutoff circuit automatically, and loop and equipment are played a protective role.
Conventionally in direct current power system, controlling circuit breaker protective device is mainly that single CPU is the scheme of core.Along with power system reliability requires more and more highlyer, particularly in the very severe important events again of this environment for use of electric power system peculiar to vessel, reliability index is required just very high, conventional DC circuit breaker protective device cannot be satisfied the demand.Hardware redundancy is mainly used in high reliability occasion, is divided into passive hardware redundancy and active hardware redundancy.Passive hardware redundancy is called again static hardware redundancy.It has applied the concept of fault masking, refers to the redundant form that redundancy structure does not change with failure condition.Conventionally the structure adopting is triplication redundancy and two mould redundancy structures.Initiatively hardware redundancy is called again dynamic hardware redundancy, mainly adopts recombinant technique.It reaches fault-tolerant a kind of technology by fault detect, fault location and fault recovery.Initiatively the form of hardware redundancy has two-shipper comparison, replacement for subsequent use and for subsequent use in pairs.
Summary of the invention
The object of the invention is, dual-computer redundancy protective device and guard method are provided, described device is bright, and to have good anti-electromagnetic interference performance, reliability high, is particularly suitable for being applied in the direct current power system peculiar to vessel that reliability requirement is high.Guard method reliability is high.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of dual-computer redundancy protective device, comprising:
Core microcomputer unit: process from the row operation of going forward side by side of the main circuit current signal of shunt sampling, and in the time that major loop meets fault actions condition by the actuating signal output obtaining after calculating;
A CPLD chip: receive the actuating signal of core microcomputer unit output, and send control signal according to actuating signal;
The relay and optical coupling isolator that connect successively: described optical coupling isolator is connected with CPLD chip, the control signal that CPLD chip sends is connected trip coil through light lotus root isolation rear drive relay and is made circuit breaker action, disjunction major loop.
As preferably, described core microcomputer unit comprises two dsp processors, i.e. dsp processor one and dsp processor two is all connected with AD sampling module and for depositing the eeprom memory of parameter of circuit breaker on each dsp processor; Described dsp processor one is connected with CPLD chip with dsp processor two; AD sampling module on two dsp processors is all connected with shunt; Dsp processor all uses SPI Interface Expanding serial EEPROM memory.
As preferably, described CPLD chip comprises an arbitration modules, tri-state switch K1 and tri-state switch K2, the self-test signal that this arbitration modules sent to arbitration modules according to the dsp processor cycle judges the situation of the operation of two dsp processors in core microcomputer unit, and controls the signal of tri-state switch K1 and tri-state switch K2 switching output or give the alarm.
A kind of dual-computer redundancy guard method, comprises the following steps:
Step 1, the main circuit current signal of shunt sampling after two AD sampling modules, delivers to dsp processor one respectively and dsp processor two carries out computing, processing;
Step 2, dsp processor one, dsp processor two output action signals in the time that major loop meets fault actions condition, export to optical coupling isolator through CPLD chip and drive relay connection trip coil to make circuit breaker action, disjunction major loop.
As preferably, also comprise a communication step display:, by the CAN controller in dsp processor one and dsp processor two, communicate by letter with the miscellaneous equipment in system through CAN interface circuit; And by CAN bus, the parameters such as the electric current of the state of circuit breaker itself and system being real-time transmitted to host computer, host computer can be adjusted to the parameter of circuit breaker simultaneously; By the RS485 controller of dsp processor one and dsp processor two, through RS485 interface circuit and touch panel communication, the parameter of circuit breaker is set and shows by touch-screen.
As preferably, also comprise a judgement selection step, before step 2, complete, that is: described dsp processor one and dsp processor two are in the time of work, acquiescence is using dsp processor one as output, dsp processor two uses as hot standby machine, arbitration modules in CPLD chip judges the situation of active and standby machine operation to the self-test signal of its transmission according to dsp processor one and dsp processor two cycles, and control the signal that switches output, and select according to the situation of the operation of dsp processor one and dsp processor two:
Judgement selects one: if all normally operation of dsp processor one and dsp processor two, using the operation result of dsp processor one as device output;
Judgement selects two: if dsp processor one fault, dsp processor two is normal, the operation result of dsp processor two is exported as system;
Judgement selects three: if dsp processor one and the equal fault of dsp processor two are sent alarm signal by arbitration modules, show that device is unavailable.
Therefore, tool of the present invention has the following advantages that to have good anti-electromagnetic interference performance, reliability high, is particularly suitable for being applied in direct current power system peculiar to vessel.
Brief description of the drawings
Accompanying drawing 1 is circuit theory schematic diagram of the present invention.
Accompanying drawing 2 two-node cluster hot backup principle schematic.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
embodiment:
As shown in Figure of description 1: device is made up of, dsp processor 1, dsp processor 22, AD sampling module 1, AD sampling module 24, eeprom chip 1, eeprom chip 26, CAN interface 8, RS485 interface 9, the isolation 10 of light lotus root and relay 11.
As shown in Figure of description 2: device has the core microcomputer unit of two DSP redundancies, a dsp processor one is main frame, and another dsp processor two is hot standby machine, two-shipper synchronous operation.Two machine configurations are identical, respectively have AD sampling module and dsp system alone.When device starts, acquiescence is using dsp processor one as output, and dsp processor two uses as hot standby machine, and tri-state switch K1 closure, tri-state switch K2 disconnect.The self-test signal that arbitration circuit sends to it according to dsp processor one and dsp processor two cycles judges the situation of active and standby machine operation, and controls the signal that switches output.If dsp processor one and all normally operations of dsp processor two, using the operation result of dsp processor one as device output; If dsp processor one fault, dsp processor two is normal, the operation result of dsp processor two is exported as system, if dsp processor one and the equal fault of dsp processor two send alarm signal by arbitration circuit, shows that device is unavailable.Arbitration circuit and tri-state switch K1, K2 are realized by field programmable gate array CPLD7, can simplify like this circuit and improve device reliability.
The main circuit current signal that device is sampled from shunt is delivered to dsp processor 1 respectively after AD sampling module 1, AD sampling module 24, dsp processor 22 carries out computing, processing, dsp processor 1, dsp processor 22 output action signals in the time that major loop meets fault actions condition, exporting to light lotus root isolation 10 through CPLD7 drives relays 11 to connect trip coil to make circuit breaker action, disjunction major loop.Device uses the memory in DSP sheet to deposit program, uses SPI Interface Expanding a slice serial EEPROM chip for depositing the relevant parameter of circuit breaker.Device uses the CAN controller in DSP sheet, communicates by letter with the miscellaneous equipment in system by CAN interface circuit 8.The parameters such as the electric current of the state of circuit breaker itself and system can be real-time transmitted to host computer by CAN bus; Host computer can be adjusted to circuit breaker relevant parameter simultaneously.Device uses the RS485 controller in DSP sheet, by RS485 interface circuit 8 and touch panel communication, is arranged and is shown circuit breaker relevant parameter by touch-screen.The state of device itself can show by indicator light, can detect device by button, and this device has self-diagnostic function simultaneously.
Protective device runs in this very complicated electromagnetic environment of direct current network, ensure its energy high stability and high reliability operation, must carry out EMC Design to it, in design process, considers from following several respects:
The first, the high isolated amplifier isolation of common-mode rejection ratio for unit simulation signal, is used low-pass filter circuit to carry out filtering; The switching value signal of device adopts photoelectric coupling quarantine measures, uses low-pass filter circuit to carry out filtering simultaneously.
The second,, for to make device avoid the invasion and attack of surge, at power input and connect surge absorber-Transient Voltage Suppressor, power line adopts the passive filter of high-quality simultaneously, to greatest extent interference signal is intercepted to the outside at device.Installation's power source adopts isolating switch power module.
Three, the signal-transmitting cable of device is selected the twisted-pair feeder of shielding, and by screen single-end earthed, synchronous signal line will lay separately; Power delivery cable also should be selected shielding conductor; CAN telecommunication cable should be selected the twisted-pair feeder of shielding, and by screen single-end earthed.
Four, the shell of protective device adopts quality steel plate integral solder to form, and conduction continuity and the sealing of energy assurance device entirety, have good capability of electromagnetic shielding.External connection is drawn by round electric connector, and seal with electromagnetic sealing liner.
Five, in the Software for Design of device, fully use digital filtering, instruction redundancy, software trap, " house dog " technology, input port signal duplicate detection, output port to repeat the measures such as output and improve device antijamming capability.
Six, printed circuit board, in the time of layout, by functional unit arrangement, reasonably separates weak current part and strong power part.VDD-to-VSS line is drawn separately, and between the power and ground of each integrated device, lotus root electric capacity is removed in access respectively.When PCB layout, holding wire short-term, separation strengthens as far as possible.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims (6)

1. a dual-computer redundancy protective device, is characterized in that, comprising:
Core microcomputer unit: process from the row operation of going forward side by side of the main circuit current signal of shunt sampling, and in the time that major loop meets fault actions condition by the actuating signal output obtaining after calculating;
A CPLD chip: receive the actuating signal of core microcomputer unit output, and send control signal according to actuating signal;
The relay and optical coupling isolator that connect successively: described optical coupling isolator is connected with CPLD chip, the control signal that CPLD chip sends is connected trip coil through light lotus root isolation rear drive relay and is made circuit breaker action, disjunction major loop.
2. dual-computer redundancy protective device according to claim 1, it is characterized in that, described core microcomputer unit comprises two dsp processors, be dsp processor one and dsp processor two, on each dsp processor, be all connected with AD sampling module and for depositing the eeprom memory of parameter of circuit breaker; Described dsp processor one is connected with CPLD chip with dsp processor two; AD sampling module on two dsp processors is all connected with shunt; Dsp processor all uses SPI Interface Expanding serial EEPROM memory.
3. dual-computer redundancy protective device according to claim 1; it is characterized in that; described CPLD chip comprises an arbitration modules, tri-state switch K1 and tri-state switch K2; the self-test signal that arbitration modules sent to arbitration modules according to the dsp processor cycle judges the situation of the operation of two dsp processors in core microcomputer unit, and controls the signal of tri-state switch K1 and tri-state switch K2 switching output or give the alarm.
4. carry out a dual-computer redundancy guard method with claim 1 protective device, it is characterized in that, comprise the following steps:
Step 1, the main circuit current signal of shunt sampling after two AD sampling modules, delivers to dsp processor one respectively and dsp processor two carries out computing, processing;
Step 2, dsp processor one, dsp processor two output action signals in the time that major loop meets fault actions condition, export to optical coupling isolator through CPLD chip and drive relay connection trip coil to make circuit breaker action, disjunction major loop.
5. dual-computer redundancy guard method according to claim 4, is characterized in that, also comprises a communication step display:, by the CAN controller in dsp processor one and dsp processor two, communicate by letter with the miscellaneous equipment in system through CAN interface circuit; And by CAN bus, the parameters such as the electric current of the state of circuit breaker itself and system being real-time transmitted to host computer, host computer can be adjusted to the parameter of circuit breaker simultaneously; By the RS485 controller of dsp processor one and dsp processor two, through RS485 interface circuit and touch panel communication, the parameter of circuit breaker is set and shows by touch-screen.
6. dual-computer redundancy guard method according to claim 4, it is characterized in that, also comprise a judgement selection step, before step 2, complete, that is: described dsp processor one and dsp processor two are in the time of work, acquiescence is using dsp processor one as output, dsp processor two uses as hot standby machine, arbitration modules in CPLD chip judges master according to dsp processor one and dsp processor two cycles to the self-test signal of its transmission, the situation of standby host operation, and the signal of output is switched in control, and select according to the situation of the operation of dsp processor one and dsp processor two:
Judgement selects one: if all normally operation of dsp processor one and dsp processor two, using the operation result of dsp processor one as device output;
Judgement selects two: if dsp processor one fault, dsp processor two is normal, the operation result of dsp processor two is exported as system;
Judgement selects three: if dsp processor one and the equal fault of dsp processor two are sent alarm signal by arbitration modules, show that device is unavailable.
CN201410162436.0A 2014-04-22 2014-04-22 Dual-redundancy protective device and protection method Pending CN103915816A (en)

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Cited By (7)

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CN106099837A (en) * 2016-07-25 2016-11-09 贝兹维仪器(苏州)有限公司 There is the oil well logging instrument protection device of stand-by circuit
CN106655504A (en) * 2016-11-29 2017-05-10 国网河南省电力公司安阳供电公司 Safe and reliable data acquisition system
CN108009047A (en) * 2017-11-24 2018-05-08 武汉船用电力推进装置研究所(中国船舶重工集团公司第七二研究所) A kind of two-node cluster hot backup model and implementation method
CN108767807A (en) * 2018-07-25 2018-11-06 佛山科学技术学院 A kind of 10kV breaker dual control trip circuits for distribution automation
CN108832661A (en) * 2018-07-13 2018-11-16 华南师范大学 A kind of grid-connected photovoltaic system of more redundancy-types
CN110165643A (en) * 2019-06-26 2019-08-23 国网山东省电力公司临朐县供电公司 A kind of interconnection Microcomputer Protection method and system
CN114217224A (en) * 2021-11-29 2022-03-22 中国三峡建工(集团)有限公司 Generator rotor current measuring system and method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106099837A (en) * 2016-07-25 2016-11-09 贝兹维仪器(苏州)有限公司 There is the oil well logging instrument protection device of stand-by circuit
CN106655504A (en) * 2016-11-29 2017-05-10 国网河南省电力公司安阳供电公司 Safe and reliable data acquisition system
CN108009047A (en) * 2017-11-24 2018-05-08 武汉船用电力推进装置研究所(中国船舶重工集团公司第七二研究所) A kind of two-node cluster hot backup model and implementation method
CN108832661A (en) * 2018-07-13 2018-11-16 华南师范大学 A kind of grid-connected photovoltaic system of more redundancy-types
CN108767807A (en) * 2018-07-25 2018-11-06 佛山科学技术学院 A kind of 10kV breaker dual control trip circuits for distribution automation
CN108767807B (en) * 2018-07-25 2023-10-31 佛山科学技术学院 Dual-control tripping circuit for 10kV circuit breaker for distribution network automation
CN110165643A (en) * 2019-06-26 2019-08-23 国网山东省电力公司临朐县供电公司 A kind of interconnection Microcomputer Protection method and system
CN114217224A (en) * 2021-11-29 2022-03-22 中国三峡建工(集团)有限公司 Generator rotor current measuring system and method

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