CN201527448U

CN201527448U - Embedded power quality monitoring system

Info

Publication number: CN201527448U
Application number: CN2009202377539U
Authority: CN
Inventors: 刘长树; 何永祥; 吴蓉; 杨波; 阮强; 夏祚青
Original assignee: Xichang Electric Power Bureau; ZHUHAI TITANS ENERGY TECHNOLOGY GROUP Co Ltd
Current assignee: Xichang Electric Power Bureau; ZHUHAI TITANS ENERGY TECHNOLOGY GROUP Co Ltd
Priority date: 2009-10-23
Filing date: 2009-10-23
Publication date: 2010-07-14
Anticipated expiration: 2019-10-23

Abstract

The utility model discloses an embedded power quality monitoring system and aims at providing an embedded power quality monitoring system with high regulation means, sensitive and rapid real-time response and strong adaptability to severe environment. The monitoring system comprises an analog signal exchange sampling part (1), a high speed analog signal processor (2), a man-machine interface processor (3), a system interface (4), a sampling unit (11), an analog signal conditioning circuit (12), an A/D signal conversion circuit (13), a DI/DO circuit (21), a DSP processor (22), an SDRAM memorizer (23), a debugging interface (31), an ARM chip (32), an extended RAM (33), an LCD interface (41), an SD card interface (42), an Ethernet interface (43) and a USB interface (44), and the circuits are correspondingly and adaptively connected. The embedded design is well verified in the fields of data processing and detective control and can be widely applied to the field of power system monitoring.

Description

A kind of embedded power quality monitoring system

Technical field

The utility model relates to a kind of embedded power quality monitoring system.

Background technology

Equipment for monitoring power quality is as the special monitoring device of modern power network power supply, power consumption parameter, the rapidity requirement of existing sampling, processing, analysis to real time data, there are transmission, demonstration, storage, the communication of pair system data to have higher requirement again, in this case, the task of system handles is of a great variety, periodic tasks such as existing data sampling, various calculating have randomness incidents such as communication, man-machine interaction again, and this just improves constantly the requirement that Real time signal is handled.Electric power supply is the mainstay that modern society depends on for existence, and the utility network of perfect condition should be powered to the user with constant frequency, normal voltage and sinusoidal waveform.But equipment such as the generator in the electric system, transformer and circuit are non-linear or asymmetric, the randomness of load character is changeable, control measures imperfection in addition, operation, extraneous interference and various failure and other reasons have produced the variety of issue in operation of power networks, power equipment and the power supply link.More and more urgent requirement has a kind of high performance design proposal to adapt with it.ARM technology and DSP technology combined be applied in the embedded system, will give full play to both advantages to reach in the intelligence control system to the real-time of data, the communicating requirement of high efficiency.Therefore on hardware design, adopt the ARM+DSP framework can satisfy system's real-time response, have strict sequential.Its working environment possibility very severe is as high temperature, low temperature, humidity etc., so system also requires very high stability and adaptability.

In sum, electric energy quality monitoring system of the prior art still can not satisfy the needs of present technical progress, has also that this that control measures are not high, real-time response is insensitive rapidly, to the not enough defective of rugged surroundings adaptability.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of control measures height, real-time response sensitive rapidly, to the adaptable embedded power quality monitoring system of rugged surroundings.

The technical scheme that the utility model adopted is: the utility model comprises simulating signal AC sampling part, the high speed analog signal processor, the man-machine interface processor, system interface, the simulating signal AC sampling partly comprises sampling unit, the analog signal conditioner circuit, the A/D signaling conversion circuit, the signal that described sampling unit is gathered is imported the A/D signaling conversion circuit after described analog signal conditioner processing of circuit, described high speed analog signal processor comprises the DI/DO circuit, dsp processor, the SDRAM storer, described dsp processor and described DI/DO circuit, the SDRAM storer is electrically connected, described man-machine interface processor comprises debugging interface, the ARM chip, expansion RAM, described ARM chip and described debugging interface, expansion RAM is electrically connected, described system interface comprises the LCD interface, the SD card, Ethernet interface, USB interface, described A/D signaling conversion circuit connects described dsp processor, described dsp processor is connected with described ARM chip, described ARM chip and described LCD interface, the SD card, Ethernet interface, the corresponding adaptive connection of USB interface.

Described sampling unit device is gathered in real time to various power supply parameters on the required monitoring point of supply network.

The beneficial effects of the utility model are: the utility model adopts the design of above embedded power quality monitoring device, provide good solution for the embedded instrumentation instrument realizes multitask, easily and effectively access network based on ethernet, realized the data transmission of Long-distance Control and real-time.Because the parallel multi-tasking of employing is handled the external event of this embedded system complexity, and the complicacy of Control Software System, guaranteed the real-time performance of system.The software and hardware configuration of this embedded system is simplified, and antijamming capability meets environmental requirement; The assembly structure easy access.The realization of this Embedded Intelligent Instrument System makes embedded design in data processing and detect in the control field and obtained good application, thus be a kind of control measures height, real-time response sensitive rapidly, to the adaptable embedded power quality monitoring system of rugged surroundings.

Description of drawings

Fig. 1 is the utility model circuit structure block scheme.

Embodiment

As shown in Figure 1, the utility model comprises simulating signal AC sampling part 1, high speed analog signal processor 2, man-machine interface processor 3, system interface 4, simulating signal AC sampling part 1 comprises sampling unit 11, analog signal conditioner circuit 12, A/D signaling conversion circuit 13, the signal that described sampling unit 11 is gathered is input A/D signaling conversion circuit 13 after described analog signal conditioner circuit 12 is handled, described high speed analog signal processor 2 comprises DI/DO circuit 21, dsp processor 22, SDRAM storer 23, described dsp processor 22 and described DI/DO circuit 21, SDRAM storer 23 is electrically connected, described man-machine interface processor 3 comprises debugging interface 31, ARM chip 32, expansion RAM 33, described ARM chip 32 and described debugging interface 31, expansion RAM 33 is electrically connected, described system interface 4 comprises LCD interface 41, SD card 42, Ethernet interface 43, USB interface 44, described A/D signaling conversion circuit 13 connects described dsp processor 22, described dsp processor 22 is connected with described ARM chip 32, described ARM chip 32 and described LCD interface 41, SD card 42, Ethernet interface 43, USB interface 44 corresponding adaptive connections.

Described sampling unit 11 devices are gathered in real time to various power supply parameters on the required monitoring point of supply network.

Adopt components and parts and design concept as follows in the present embodiment:

1, simulating signal AC sampling part (ADS8364);

2, high speed analog signal processor (DSP F2812+SDRAM);

3, man-machine interface processor (ARM 2214);

4, system interface (LCD+SD+ Ethernet+USB);

The Interface design of ARM and DSP:

System adopts the master-slave mode parallel processing system (PPS) of ARM+DSP, the function of man-machine interaction and data communication is concentrated in the subsystem of ARM, is finished the control of all peripheral hardwares by main frame.And dsp chip is mainly finished seizure, sampling, conversion to input signal, realizes multiple signal processing algorithm, and the digital signal after will handling is then passed to ARM.Again by ARM by ethernet controller with data transmission to network, realized Long-distance Control and monitoring.

The Interface design of ARM and LCD:

The 2214th, 16/32 risc processor that Samsung company releases, CPU frequency 206MHz, standard configuration is the 256K of a Sharp look 240x320/3.5 inch TFT liquid crystal display, the band touch-screen is supported Linux, WINCE and EPOC32.The smart card driver module that meets ISO7816 and EMV2000 under the linux kernel is provided and meets ISO14443A/B and Mifare series contactless smart card driver module.Its small size, low-power consumption, high performance characteristics provide convenience for the design of electrical network equipment for monitoring power quality.The ARM system mainly realizes the scheduling and the control of basic control unit herein, with data add up, function such as storage, communication and man-machine conversation.

The design of communicating by letter between ARM and the ethernet controller:

The ethernet communication function realizes that by 1 RTL8019AS it does not have specific (special) requirements to flush bonding processor, highly versatile.Use the default configuration and the initial method of some pins of RTL8019AS among the design, can save config memory like this, reduce the volume of embedded hardware platform as network interface card.

The Interface design of DSP and data sampling:

ADS8364 is the sixteen bit analog to digital converter of a kind of high speed, low-power consumption, six passage synchronized samplings and conversion, employing+5V operating voltage.The fully differential input channel of 80dB common mode inhibition.The analog to digital converter that also comprises six 4 μ s continuous approximation, six difference sampling amplifiers, the inside+2.5V reference voltage of band REFIN and REFOUT pin, and high speed parallel interface.Six analog inputs are divided into three groups (A, B and C), and each input end has an ADCs and holding signal to be used for guaranteeing that several passages can sample and change simultaneously.The difference input range can change to the+VREF from-VREF.Adopt ADS8364 that the three-phase voltage electric current of electrical network is sampled, and give DSP with sampled data and carry out the real-time analysis processing, the sample frequency of ADS8364 is 6.4KHz, weekly 256 points of ripple sampling.

The utility model can be widely used in the electric energy quality monitoring field.

Claims

1. embedded power quality monitoring system, it is characterized in that: it comprises simulating signal AC sampling part (1), high speed analog signal processor (2), man-machine interface processor (3), system interface (4), described simulating signal AC sampling part (1) comprises sampling unit (11), analog signal conditioner circuit (12), A/D signaling conversion circuit (13), the signal that described sampling unit (11) is gathered is input A/D signaling conversion circuit (13) after described analog signal conditioner circuit (12) is handled, described high speed analog signal processor (2) comprises DI/DO circuit (21), dsp processor (22), SDRAM storer (23), described dsp processor (22) and described DI/DO circuit (21), described SDRAM storer (23) is electrically connected, described man-machine interface processor (3) comprises debugging interface (31), ARM chip (32), expansion RAM (33), described ARM chip (32) and described debugging interface (31), described expansion RAM (33) is electrically connected, described system interface (4) comprises LCD interface (41), SD card (42), Ethernet interface (43), USB interface (44), described A/D signaling conversion circuit (13) connects described dsp processor (22), described dsp processor (22) is connected with described ARM chip (32), described ARM chip (32) and described LCD interface (41), SD card (42), Ethernet interface (43), the corresponding adaptive connection of USB interface (44).