CN208723528U - A kind of low-voltage circuit breaker intelligent controller - Google Patents

Abstract

The utility model discloses a kind of low-voltage circuit breaker intelligent controllers, including data acquisition unit, from processor, primary processor, data acquisition unit includes magnitude of current acquisition module, voltage acquisition module, switching value acquisition module, magnitude of current acquisition module, voltage acquisition module, the input terminal of switching value acquisition module acquires electric current respectively, voltage, on-off model, magnitude of current acquisition module, voltage acquisition module, the output end of switching value acquisition module is separately connected from processor, it is connected from processor with primary processor, primary processor connects breaker by driving circuit, primary processor is connected by Ethernet with PC machine.The utility model uses dual-core architecture, PowerPC including fpga chip and primary processor from processor, the algorithm that processor needs to complete is reduced, the advantage of two processors can be preferably played, so that low-voltage circuit breaker smart controller system has many advantages, such as that processing capacity is strong, stability is high, real-time is good.

Description

A kind of low-voltage circuit breaker intelligent controller

Technical field

The utility model relates to field of circuit breakers, in particular to a kind of low-voltage circuit breaker intelligent controller.

Background technique

Low-voltage circuit breaker is low voltage electric network, very important switch control electric appliance in electric system.In transmission & distribution electric control, hold It carries and closes running current, protection power grid and ensure that electrical equipment safe operation aspect low-voltage circuit breaker is responsible for important duty.

As electric network composition is increasingly sophisticated, capacity constantly expands, real time information conveying capacity increases at double, to low-voltage circuit breaker More stringent requirements are proposed with the data communication of substation automation system.In order to reach monitoring and control to entire network system System, it is necessary to use network and means of communication, collect and be distributed very wide information, monitored and controlled.There is a situation where accidents Under, the status information of accident should be collected in time, handle rapidly and ex-post analysis is carried out to accident, to guarantee the safety of power generation Economic stability operation.

Utility model patent 201420314725.3 discloses a kind of intelligent controller for intelligent low voltage circuit breaker, should Intelligent controller uses dual-core architecture, the i.e. form of ARM+DSP, is communicated between double-core by I2C.Firstly, human-computer interaction Part processes device using ARM, and for ARM is with respect to PowerPC, system stability is poor, is not suitable for environment complexity and data are huge Power grid environment.In addition, DSP is good at data operation, but the characteristics of serially executed instruction due to it, acquisition data capability cannot The requirement of enough real-time multiple protectives for sufficiently meeting breaker.

Utility model patent 201420317218.5 discloses a kind of intelligent controller on intelligent low voltage circuit breaker, The intelligent breaker uses mononuclear structure, and using FPGA processor as CPU, the data of collection in worksite are transmitted to open circuit by bus Data processing is carried out in device.The strong point of FPGA is data processing, but its peripheral interface is abundant not as good as PowerPC, to entire system The control ability of system is also strong not as good as PowerPC.

Utility model patent 201621094173.5 discloses a kind of high-voltage circuitbreaker on-line monitoring system, the breaker Intelligent monitoring terminal uses mononuclear structure, and using STM32 single-chip microcontroller as microcontroller, voltage, the current signal of breaker pass through Bus, which is transmitted in CPU, carries out data processing.The interface of STM32 single-chip microcontroller is very rich, and control ability is strong, is very suitable to conduct oneself Machine interaction, but its data-handling capacity is not strong, it is difficult to meet system processing requirement of the breaker in complex electric network.

The case where substation automation system communication specification is at present: the circuit breaker that substation uses may be from not Same equipment manufacturer；The communication protocol and interface of such bay device are established one's own system, and are caused between devices from different manufacturers mutually The problem of operation and poor compatibility；The different network communication technology of wall is also one of problem, and there are CAN buses, Lon Works bus, ethernet technology, universal serial bus etc..Design, integrated, test, later maintenance, upgrading of the these problems to system Very big difficulty is brought, the development of the automation of transformation substations is hindered.

Summary of the invention

In order to solve the above-mentioned technical problem, the utility model provides that a kind of structure is simple, processing capacity is strong, stability is good Low-voltage circuit breaker intelligent controller.

The technical solution that the utility model solves the above problems is: a kind of low-voltage circuit breaker intelligent controller, including including Data acquisition unit, from processor, primary processor, the data acquisition unit include magnitude of current acquisition module, voltage acquisition Module, switching value acquisition module, the magnitude of current acquisition module, voltage acquisition module, switching value acquisition module input terminal Respectively acquire electric current, voltage, on-off model, magnitude of current acquisition module, voltage acquisition module, switching value acquisition module it is defeated Outlet is separately connected from processor, is connected from processor with primary processor, and primary processor connects breaker by driving circuit, real Existing breaker cut-offs and is closed, and primary processor is connected by Ethernet with PC machine.

Above-mentioned low-voltage circuit breaker intelligent controller, the magnitude of current acquisition module include current transformer, variable connector and Amplifying circuit, A/D converter I, current transformer acquire magnitude of current signal, the output end of current transformer and variable connector and put The input terminal of big circuit is connected, and the output end of variable connector and amplifying circuit is connected with the input terminal of A/D converter I, A/D conversion The output end of device I is connected with from processor.

Above-mentioned low-voltage circuit breaker intelligent controller, the voltage acquisition module include voltage transformer, voltage signal tune Circuit, A/D converter II, voltage transformer collection voltages amount signal are managed, the output end and voltage signal of voltage transformer improve The input terminal of circuit is connected, and the output end of voltage signal conditioning circuit is connected with the input terminal of A/D converter II, A/D converter II output end is connected with from processor.

Above-mentioned low-voltage circuit breaker intelligent controller, the voltage signal conditioning circuit include difference operational amplifying circuit, filtered electrical Road and pressure limiting circuit, difference operational amplifying circuit, filter circuit and pressure limiting circuit are sequentially connected in series.

Above-mentioned low-voltage circuit breaker intelligent controller, the switching value acquisition module include receiving circuit, optocoupler, trigger, It receives circuit and receives on-off model, receive circuit, optocoupler, trigger and be connected to again after being sequentially connected from processor.

Above-mentioned low-voltage circuit breaker intelligent controller, further includes LCD screen, keyboard and timer, LCD screen, keyboard, timer and Primary processor is connected.

Above-mentioned low-voltage circuit breaker intelligent controller, further includes RS232 interface and USB interface, and RS232 interface, USB interface are equal It is connected with primary processor.

Above-mentioned low-voltage circuit breaker intelligent controller, further includes memory module, memory module include DDR3, NAND FLASH, NOR FLASH and SRAM.

Above-mentioned low-voltage circuit breaker intelligent controller, it is described to use fpga chip, model EP3C40F324, institute from processor Primary processor is stated using PowerPC, model MPC8313.

Above-mentioned low-voltage circuit breaker intelligent controller, the current transformer use Rogowski coil.

The utility model has the beneficial effects that:

1, the utility model uses dual-core architecture, the PowerPC including fpga chip and primary processor from processor, place The algorithm that reason device needs to complete is reduced, and saves memory, so as to preferably play the advantage of two processors, so that low pressure is disconnected Road device smart controller system has many advantages, such as that processing capacity is strong, stability is high, real-time is good.

2, the primary processor of the utility model uses PowerPC, its advantage is that degree of integration is high and technical advance, and thousand Million network interface controllers, there are also many common interfaces all to integrate for CAN controller, without the peripheral circuit that design is complicated, subtracts Complexity is designed less and material uses, and the optional range of chip is big, and performance is high, and upgrading is easy.

3, the utility model uses dual core processor, utilizes PowerPC interface abundant and superior transaction management ability It allows it as main core, is responsible for the whole control of system.It avoids carrying out data acquisition with directly controlling A/D chip；Utilize FPGA Data sampling ability outstanding completes the data acquisition of analog quantity and switching value；It is double relative to the breaker based on mononuclear structure Core processor can effectively the data acquisition of sharing system and operation control task monitor so that breaker operation is more smooth It is more accurate.

4, the utility model supports ECC function, can carry out forward error correction to the read and write access of DDR3 SDRAM, reduce In memory use process the case where soft failure, the system stability and reliability of breaker are effectively increased.

5, the utility model is supported to receive GPS clock synchronization, to meet the requirement of real time of IEC61850 communication；With ether Netcom Casually, the specifications such as IEC61850, IEC61970-103, Modbus are supported, the intelligence of IEC61850 specification substation is complied fully with Equipment requirement.

6, the utility model carries out the monitoring of power network current using Rogowski coil as current transformer. Rogowski coil is a kind of air core coil of special construction, it is characterized in that tested current range is wide, reflection speed is fast, can To measure electric current of the rising edge ascending time as nanosecond, Rogowski coil is combined with integrated circuit, overcomes tradition Iron core electromagnetic transformer, by electronics amplifying element, improves measurement spirit because core sataration makes the increased defect of measurement error Sensitivity expands current measuring range.

Detailed description of the invention

Fig. 1 is the overall structure block diagram of the utility model.

Fig. 2 is the specific block diagram of the utility model.

Fig. 3 is the working principle block diagram of the utility model magnitude of current acquisition module.

Fig. 4 is the Power Supply Monitoring of the utility model and the circuit diagram of reseting module.

Fig. 5 is the circuit diagram of the clock module of the utility model.

Fig. 6 is the circuit diagram of the plug-in memory modules of the utility model.

Fig. 7 is the circuit diagram of the memory module of the utility model.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and examples.

As shown in Figure 1 and Figure 2, a kind of low-voltage circuit breaker intelligent controller, including including data acquisition unit, from processor, Primary processor, LCD screen, keyboard, timer, RS232 interface, USB interface, memory module, B code clock synchronization mouth, the data acquisition Unit includes magnitude of current acquisition module, voltage acquisition module, switching value acquisition module, the magnitude of current acquisition module, voltage Amount acquisition module, switching value acquisition module input terminal acquire electric current, voltage, on-off model respectively, magnitude of current acquisition module, Voltage acquisition module, switching value acquisition module output end be separately connected from processor, from processor and B code clock synchronization mouth, master Processor is connected, and LCD screen, keyboard, timer, RS232 interface, USB interface are connected with primary processor, and memory module includes DDR3, NAND FLASH, NOR FLASH and SRAM, DDR3, NAND FLASH, NOR FLASH and SRAM respectively with primary processor It is connected.Primary processor connects breaker by driving circuit, realizes cut-offfing and being closed for breaker, primary processor passes through Ethernet It is connected with PC machine.

The magnitude of current acquisition module includes current transformer, variable connector and amplifying circuit, A/D converter I, and electric current is mutual Sensor acquires magnitude of current signal, and the output end of current transformer is connected with the input terminal of variable connector and amplifying circuit, and multichannel is opened Close and the output end of amplifying circuit be connected with the input terminal of A/D converter I, the output end of A/D converter I with from processor phase Even.

As shown in figure 3, selecting Rogowski coil as the monitoring of current transformer progress power network current.When tested exchange When electric current passes through Rogowski coil, coil generates induced electromotive force output signal, which passes through integrator ring again The voltage value of section, output is directly proportional to tested electric current, and integrator input voltage signal is then passed through programmable automation controller Device LH0084 is amplified, and amplification factor is controlled by FPGA processor, and realizes automatic measuring range.Finally, turning through A/D Parallel operation I carries out inter-process, is converted into corresponding current value digital quantity, and PowerPC is transferred to carry out data diagnosis.

Rogowski coil is a kind of air core coil of special construction, it is characterized in that tested current range is wide, reflection speed Degree is fast, can measure the electric current that rising edge ascending time is nanosecond, Rogowski coil is combined with integrated circuit, is overcome Traditional iron core electromagnetic transformer improves the increased defect of measurement error by electronics amplifying element because of core sataration Measurement sensitivity expands current measuring range.

Rogowski coil and FPGA are implemented in combination with current detecting, and by external keyboard circuit module, user of service can To set different current settings, the three section protection curve of different range is selected.Display apparatus module can be by the detection of electric current As a result real-time display.When there are the abnormal conditions such as wink streaming current excessive, short-circuit or overload, PowerPC single-chip microcontroller will The signal for issuing fault detection output determines that executing corresponding breaker takes off according to the range intervals that current value is in three section protection Pull work.Under normal circumstances, user of service can be issued by keyboard and be instructed, and issue tripping signal instruction by PowerPC Execute trip action.

The voltage acquisition module includes voltage transformer, voltage signal conditioning circuit, A/D converter II, and voltage is mutual Sensor collection voltages amount signal, the output end of voltage transformer are connected with the input terminal of voltage signal conditioning circuit, voltage signal The output end of conditioning circuit is connected with the input terminal of A/D converter II, and the output end of A/D converter II is connected with from processor. Hall voltage mutual inductor is selected to carry out the monitoring of network voltage, monitoring data are first passed through in voltage signal conditioning circuit, passed through after A/D converter II carries out inter-process, is converted into corresponding voltage value digital quantity, and PowerPC is transferred to carry out data diagnosis.It is described Voltage signal conditioning circuit includes difference operational amplifying circuit, filter circuit and pressure limiting circuit, difference operational amplifying circuit, filter circuit and limit Volt circuit is sequentially connected in series.

The switching value acquisition module includes receiving circuit, optocoupler, trigger, receives circuit and receives on-off model, connects Circuit, optocoupler, trigger is received to be connected to again after being sequentially connected from processor.Receiving circuit includes current-limiting resistance and absorbing circuit, institute The current-limiting resistance stated is used to receive the switching value of acquisition, and on-off model is filtered via filter circuit, filtered Signal is connected with optocoupler TLV847, carries out isolation processing, and the on-off model after isolation is connected with Schmidt trigger, finally will Signal inputs to FPGA and carries out data diagnosis.

The fpga chip EP3C40F324 that Altera is used from processor, is mainly responsible for feeder line data in substation Acquisition conditioning.FPGA controls the data sampling of A/D converter, switching value acquisition module, and data are sent with treated by analysis Enter PowerPC.The data acquisition of the analog quantitys such as the magnitude of current, the voltage is by fpga chip control A/D chip with 10 kHz Sample frequency carry out the sampling of electric current and voltage signal, FPGA chooses A/D chip by chip selection signal, by channel In 16 data deposit data registers.After reading 8 times, data are sent to FPGA by data parallel bus, FPGA pairs Data are pre-processed, and First Input First Output (First Input First Output, FIFO) caching is then fed into.Institute The A/D chip stated uses the ADS8586 modulus conversion chip of TI company.

The primary processor use Freescale company PowerPC, model MPC8313, for realizing all power, The Digital Signal Processing such as energy, virtual value, power factor (PF) and human-computer interactive control.

Working principle between FPGA the and PowerPC double-core are as follows: passed through between FPGA and PowerPC first UPP interface is attached, and is communicated by the way of data/address bus, i.e. PowerPC is used during reading data, writing data Corresponding state flag bit is set to indicate that the state of FIFO, by the counting for calculating data write-in and reading, to judge Data volume in FIFO, PowerPC continue to read data from FIFO until FIFO is empty.Secondly, PowerPC pairs Data transmitted by FPGA are handled, and are on the one hand presented signal waveform and troubleshooting result on LCD screen.On the other hand Pwm signal can be issued for fault data Power PC Processor, driving circuit carries out the amplification of output power first, then disconnected The mechanical part of road device executes movement, to realize cut-offfing and being closed for breaker.

Using PowerPC as host CPU, chip uses the MPC8313 processor of Freescale company, examines the utility model It is larger more with processing data to consider program, extender memory DDR3, NAND FLASH, NOR FLASH and SRAM is needed to come Store program and data；Ethernet interface is extended, fiber optic Ethernet mouth (Gb Ethernet 1) supports IEC61850 specification, is used for group Net and receive control information, can complete a breaker cut-off or closed procedure, electrical Ethernet interface (Gb Ethernet 2) It is used for device to test；GPS receiver clock synchronization is supported, to meet the requirement of real time of IEC61850 communication；RS-232 interface is for embedding Enter the browsing and erasing of formula platform program；USBTAP interface is used for the debugging of program；By clock synchronizing chip, can complete 1588 clock synchronizations；The interface of the I2C of extension, the driving for alarm indicator；Light serial ports, I/O mouthfuls and B code clock synchronization, pass through FPGA and CPU carry out seamless bus and connect, for receive power grid analog quantity information and some on-off state information.

The utility model mainly realizes the monitoring of three kinds of magnitude of current, voltage and switching value quantity of states.Analog signal is adopted During collection, the circuit-breaker status amount that signal transformer monitors is sent into system in the form of analog electrical signal first, by A/D It is dealt into Power PC Processor again after conversion, the acquisition of digital signal is the data monitoring of switching value, passes sequentially through signal reception Digital signal is sent directly into PowerPC and handled by circuit, isolation optocoupler and trigger.Failure diagnostic process is mainly Power PC Processor handles collected data, and completes complete machine control and human-computer interaction.In data handling procedure, Processor is compared and analyzes with historical data again according to the data in database, obtains the waveform and accident analysis knot of signal Fruit.In complete machine control process, the working condition of breaker is shown in man-machine interface and is sent to backstage by Power PC Processor PC machine.

As shown in figure 4, Power Supply Monitoring and reseting module use two panels power monitoring chip, a piece of hardware watchdog and FPGA To realize jointly.The course of work is as follows: Power Supply Monitoring 1 and Power Supply Monitoring 2 by marking signal be sent into FPGA " CPU house dog is patrolled Volume " in；CPU feeding-dog signal is sent into " the CPU house dog logic " of FPGA；External hardware house dog generates answering for entire controller Position signal, and be sent into " CPU house dog logic "；Hardware watchdog is powered and is monitored using 3.3V, always when 3.3V is powered on In reset state, when voltage is normal, hardware watchdog delay 100ms solution resets；After hardware watchdog solution resets, CPU is seen Door dog default value 10 minutes, " the CPU house dog logic " of FPGA periodically can send clear dog signal to hardware watchdog at this time；When The house dog time can be set after CPU starting, when the unclear dog of CPU in setting time, " CPU house dog logic " can stop seeing hardware Door dog sends clear dog signal, then module resets after postponing the hardware watchdog time.

As shown in figure 5, clock module needs the outer clock for supplying 3 kinds of different frequencies, frequency be respectively 33.333MHz, 25MHz,10MHz.System clock SYSCLK and DDR clock have source crystal oscillator to obtain two-way through PLL chip frequency multiplication by 33.333MHz's 66.67MHz clock is supplied to Power PC core piece later, is used as system clock all the way, is used as DDR clock all the way；Differential clocks There is source crystal oscillator to separate two-way 100MHz differential clocks supply PowerPC's after clock generator frequency multiplication by 25MHz all the way The PCI-E module of SerDes module and FPGA；Monitoring and house dog clock have source crystal oscillator generation by 10MHz, are sent directly into FPGA。

As shown in fig. 6, the plug-in 2 DDR3 chips of PowerPC in memory modules, A chip for storing data, use by B chip In 8 ECC datas of storage.Data interaction is carried out by MDQ [15:0] between A chip and PowerPC, B chip and PowerPC it Between least-significant byte data line connected by MECC [7:0], most-significant byte then pulls down to ground.Data are built-in using DDR3 with data strobe bus ODT realizes matching.Address and control bus use terminal parallel connection matching way.

As shown in fig. 7, NAND FLASH is visited for storing project data using parallel bus Bank0 in memory module It asks, most-significant byte data line and the dedicated NAND FLAS interface of PowerPC are connected with NAND FLASH；NOR FLASH draws for storing Lead code, operating system and RTS, using parallel bus Bank1 access, when module powers on need from the chip by program designation to It is run in memory；SRAM saves data for storing power down, selects parallel bus Bank2 access.

Claims (10)

1. a kind of low-voltage circuit breaker intelligent controller, it is characterised in that: including data acquisition unit, from processor, primary processor, The data acquisition unit includes magnitude of current acquisition module, voltage acquisition module, switching value acquisition module, and the magnitude of current is adopted Collection module, voltage acquisition module, switching value acquisition module input terminal acquire electric current, voltage, on-off model, electric current respectively Amount acquisition module, voltage acquisition module, switching value acquisition module output end be separately connected from processor, from processor and master Processor is connected, and primary processor realizes cut-offfing and being closed for breaker, primary processor passes through by driving circuit connection breaker Ethernet is connected with PC machine.

2. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: the magnitude of current acquisition module packet Current transformer, variable connector and amplifying circuit, A/D converter I are included, current transformer acquires magnitude of current signal, Current Mutual Inductance The output end of device is connected with the input terminal of variable connector and amplifying circuit, and the output end and A/D of variable connector and amplifying circuit turn The input terminal of parallel operation I is connected, and the output end of A/D converter I is connected with from processor.

3. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: the voltage acquisition module packet Include voltage transformer, voltage signal conditioning circuit, A/D converter II, voltage transformer collection voltages amount signal, voltage transformer Output end be connected with the input terminal of voltage signal conditioning circuit, the output end of voltage signal conditioning circuit and A/D converter II Input terminal be connected, the output end of A/D converter II is connected with from processor.

4. low-voltage circuit breaker intelligent controller according to claim 3, it is characterised in that: the voltage signal conditioning circuit Including difference operational amplifying circuit, filter circuit and pressure limiting circuit, difference operational amplifying circuit, filter circuit and pressure limiting circuit are sequentially connected in series.

5. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: the switching value acquisition module packet It includes and receives circuit, optocoupler, trigger, receive circuit and receive on-off model, after reception circuit, optocoupler, trigger are sequentially connected It is connected to again from processor.

6. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: further include LCD screen, keyboard and fixed When device, LCD screen, keyboard, timer are connected with primary processor.

7. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: further include RS232 interface and USB Interface, RS232 interface, USB interface are connected with primary processor.

8. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: it further include memory module, storage Module includes DDR3, NAND FLASH, NOR FLASH and SRAM, DDR3, NAND FLASH, NOR FLASH and SRAM with master Processor is connected.

9. low-voltage circuit breaker intelligent controller according to claim 1, it is characterised in that: described to use FPGA from processor Chip, model EP3C40F324, the primary processor use PowerPC, model MPC8313.

10. low-voltage circuit breaker intelligent controller according to claim 2, it is characterised in that: the current transformer uses Rogowski coil.