CN2932397Y - Electric harmonic and interharmonic monitoring device - Google Patents

Electric harmonic and interharmonic monitoring device Download PDF

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Publication number
CN2932397Y
CN2932397Y CN 200620051198 CN200620051198U CN2932397Y CN 2932397 Y CN2932397 Y CN 2932397Y CN 200620051198 CN200620051198 CN 200620051198 CN 200620051198 U CN200620051198 U CN 200620051198U CN 2932397 Y CN2932397 Y CN 2932397Y
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CN
China
Prior art keywords
harmonic
mcu
dsp
instrument
monitoring
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CN 200620051198
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Chinese (zh)
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粟时平
刘桂英
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粟时平
刘桂英
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Priority to CN 200620051198 priority Critical patent/CN2932397Y/en
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Publication of CN2932397Y publication Critical patent/CN2932397Y/en

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Abstract

A novel monitoring device for the electric power harmonic and inter-harmonic, comprising an instrument voltage transformer set, an instrument current transformer set, an Analog to Digital converter, a Digital Signal Processing, a Microprogrammed Control Unit, two program memories, an Input/Output controller, a data memory, a communication control unit, a display, a keyboard, a touch screen and a mouse. The utility model is characterized in that the instrument voltage transformer set and the instrument current transformer set form a three-phase voltage current sample circuit, and the Analog to Digital converter is connected in between the sample circuit and the Digital Signal Processing. The High Power Inhibit data bus is used to communicate between the Digital Signal Processing and the Microprogrammed Control Unit, and two program memories are connected with the Digital Signal Processing and the Microprogrammed Control Unit through buses respectively. The data memory is connected with the Microprogrammed Control Unit, and the display, the keyboard, the touch screen and the mouse are connected with the corresponding ports of the Input/Output controller of the Microprogrammed Control Unit respectively. The utility model achieves the real-time monitoring and analysis for the harmonic and inter-harmonic of the electric power system and the user power distribution network.

Description

An electric harmonic and a harmonic monitoring device

Technical field

The utility model relates to an electric harmonic and a harmonic monitoring technology, especially for an electric harmonic and a harmonic monitoring device of electric system and power consumer power distribution network.

Background technology

Existing harmonic monitoring product major part is integer harmonics monitoring device (instrument) for harmonic wave, and lacking a harmonic wave is the instrument (device) that non-integral multiple harmonic wave is monitored.

In addition, existing harmonic monitoring device (instrument) the mimic channel modes that adopt more, or adopt the industrial computer mode, or low speed signal processor (DSP) mode, in the consideration of doing aspect three-phase real-time collection, the analyzing and processing simultaneously seldom, functional reliability is undesirable, and the harmonic monitoring number of times is low.

In view of existing harmonic monitoring technology above shortcomings, the utility model proposes an a kind of new harmonic and a harmonic device, not only can monitor a harmonic wave and a harmonic wave on the spot, and can pass through telephone wire or optical fiber and master server simultaneously and form the real time and on line monitoring network.

An electric harmonic of the present utility model and a harmonic monitoring device, its composition comprises the instrument voltage transformer group, the instrument current transformer group, A/D converter, a digital signal processor (DSP), a microcontroller (MCU), 2 program storage (program storages 1, program storage 2), the I/O controller, data-carrier store, communication control unit, display and keyboard, touch-screen and mouse, it is characterized in that instrument voltage transformer group and instrument current transformer group constitute the three-phase voltage current sampling circuit, A/D converter is connected between sample circuit and the DSP, communicating by letter between DSP and the MCU adopted the HPI data bus, 2 program storages by bus respectively with DSP, MCU connects, data-carrier store is connected with MCU by bus, display and keyboard, touch-screen and mouse all are connected in the corresponding port of the I/O controller of MCU.It adopts advanced technologies such as high-speed floating point DSP, embedded MCU, HPI bus, high-capacity FLASH, embedded OS, in the electric harmonic supervisory system, adopt DSP to finish windowing FFT computing first, and then a harmonic wave and a harmonic wave are carried out high precision, detect in real time, analyze and control.Technology constitutes the thought novelty, compact conformation, reliable, powerful, intelligent behaviour is good, information processing rate and detection control accuracy improve a lot than prior art, realize a harmonic wave and a harmonic wave state of bus rod, feeder line are monitored in real time and analyzed, control.

The utility model can show three-phase voltage, electric current, frequency in real time, three-phase 2~100 subharmonic voltages, electric current, power, harmonic voltage, electric current between three-phase 0~2500Hz frequency range, between the resolution of harmonic monitoring less than 50/8Hz, voltage, electric current real-time waveform, harmonic wave and a harmonic spectrum.

The utility model is equipped with Ethernet, serial ports and USU Communications Control Interface, adopt electric harmonic can form a harmonic wave and a harmonic monitoring net, realize the comprehensive analysis processing and the multiple users share of harmonic wave and a harmonic parameters and parameters of electric power with a harmonic monitoring device group and server.

Description of drawings

Fig. 1 is the theory diagram of this electric harmonic and a harmonic monitoring device;

Fig. 2 is that an electric harmonic and the harmonic monitoring device of Fig. 1 implemented circuit diagram.

Embodiment

This electric harmonic and a harmonic monitoring device such as theory diagram 1 and enforcement circuit are shown in Figure 2, and it comprises: instrument voltage transformer group, instrument current transformer group, A/D converter, a digital signal processor (DSP), a microcontroller (MCU), 2 program storages (program storage 1, program storage 2), I/O controller, data-carrier store, communication control unit, display and keyboard, touch-screen and mouse.Instrument voltage transformer group and instrument current transformer group constitute the three-phase voltage current sampling circuit, A/D converter is connected between sample circuit and the DSP, communicating by letter between DSP and the MCU adopted the HPI data bus, 2 program storages are connected with DSP, MCU respectively by bus, data-carrier store is connected with MCU by bus, and display and keyboard, touch-screen and mouse all are connected in the corresponding port of the I/O controller of MCU.

The current signal (1) of the voltage signal of three-phase instrument voltage transformer group and three-phase instrument current transformer group obtains from voltage transformer (VT) (PT) and the current transformer (CT) that is provided to electric system (or power consumer) transformer station respectively.The three-phase voltage current sampling circuit is made up of instrument voltage transformer group and instrument current transformer group (2) and front end signal filtering circuit, to be to be fit to the weak electric signal that subsequent conditioning circuit uses from the high-voltage large current conversion of signals of CT, PT, and the spike on the filtered signal line disturb.

A/D transducer (3) adopts high-precision 16 6 road A/D transducers of sampling simultaneously, A/D converter adopts the ADS8364 chip, sampling rate can be up to 250K, each analog signals is converted to digital quantity signal, and send it to DSP, 6 road selecting for use of characteristic of sampling have simultaneously guaranteed the real simultaneity of voltage, current signal, and the actual employing speed of using is 25.6K.

DSP (4) adopts the high performance float-point DSP (TMS320C6711DGDPA chip) of latest digital signal processing technology, this technology is different from common science and calculates and analyze, and is applicable to towards the real-time processing of high-performance, repeatability, numerical operation intensity.

Program storage 1 (5) is mainly used in to solidify deposits the DSP operation program.DSP is in when beginning operation, at first will be solidificated in DSP operation program in the program storage 1 and call among the inner and RAM that extends out of DSP, and then digital signal is carried out computing and processing.

MCU (6) will directly visit the internal memory RAM of DSP by the HPI bus interface of DSP, the data of DSP behind windowing FFT are carried out further data analysis and processing, finish large-screen lc demonstration on the spot, large capacity data memory storage on the spot, finish the functions such as distant place transmission control of data simultaneously.The MCU chip adopts built-in PC 104 main frames.

Program storage 2 (7) is mainly used in to solidify deposits the MCU operation program.MCU is in when beginning operation, at first will be solidificated in MCU operation program in the program storage 2 and call among the inner and RAM that extends out of MCU, and then to data carry out computing, processing with to demonstration, communicate by letter, operation etc. controls.

Program storage 1 and program storage 2 all adopt the FLASH storer.

Display (8) adopts big screen LCD, can finish on the spot on the instrument to above-mentioned harmonic wave, a harmonic wave and various parameters of electric power to show.

Ethernet interface and serial interface (9) are provided convenience for data telecommunications and composition monitoring network.

Touch-screen (10) is provided convenience for the man-machine interface intellectualized operation.

USB interface (11) is the plug and play interface, can insert keyboard, mouse, USB flash disk, should move PnP devices such as hard disk.

Pilot lamp (12) can provide the light warning that transfinites with fault.

The course of work below in conjunction with theory diagram 1 and enforcement circuit diagram 2 these devices of detailed description.

Sample circuit disturbs high voltage, big current signal through the spike that transducer is converted on weak electric signal and the filtered signal line, be coupled to the A/D change-over circuit through the signal coupling circuit of forming by difference channel and filtering electric power then, the main filtering high-frequency signal of coupled circuit, owing to adopted difference modes, improved the conjugated analoging systeming ratio of coupled circuit effectively.

High performance float-point DSP mainly receives the data of A/D conversion, and real-time signal calculated frequency, utilization windowing fft algorithm calculates three-phase voltage, (ripple 514 points of sampling weekly of the amplitude of harmonic component and phase place between the amplitude of 2~100 order harmonic components of current signal and phase place and 0~2500Hz frequency, sample frequency 25600HZ), and further calculate three-phase 2~100 subharmonic power, this signal is transferred to the further analyzing and processing of MCU by the HPI interface, the employing of HPI interface, both guaranteed that signal at a high speed, in real time, accurately, errorless transmission, also saved components and parts, and then reduced cost and improve reliability; MCU mainly finishes the further computational analysis (calculating each harmonic voltage, electric current containing ratio, the resultant distortion rate) of data, be responsible for simultaneously data storage on the spot, comparison, communication, show in real time, systematic parameter function is set etc.

The high capacity CF card of 1Gbit is mainly finished the storage on the spot of real time record, alert data; Utilize touch-screen or mouse, can realize various display operations easily; Utilize keyboard, can finish the setting of systematic parameter (parameters such as warning limit value that comprise voltage PT parameter, electric current CT parameter, system short circuit capacity, each harmonic parameter) easily and adjust.

Monitoring interface of the present utility model comprises: the real-time waveform demonstration of main interface, harmonic wave and a harmonic synthesis data presentation, harmonic synthesis data presentation, a harmonic synthesis data presentation, voltage harmonic and a harmonic spectrum demonstration, current harmonics and a harmonic spectrum demonstration, the demonstration of harmonic wave active power frequency spectrum, the demonstration of harmonic wave reactive power frequency spectrum, other parameters of electric power demonstration and pilot lamp etc.

Serial ports and Ethernet are used to the real-time Transmission of data that passage is provided.The serial communication interface has RS485 and two interfaces of RS232, ethernet interface then can make full use of existing bandwidth and realize high-speed transfer, USB interface is provided convenience for utilizing the direct data download of storer such as USB flash disk, portable hard drive, in addition, USB interface is provided convenience for inserting plug and play mouse and keyboard.

The utility model has been broken traditional harmonic monitoring notion, and harmonic monitoring is expanded to the non-integer harmonic wave from integer harmonics, has realized the overall monitor of harmonic wave.

Claims (4)

1, an a kind of novel electric power harmonic wave and a harmonic monitoring device, its composition comprises the instrument voltage transformer group, the instrument current transformer group, A/D converter, a digital signal processor (DSP), a microcontroller (MCU), 2 program storage (program storages 1, program storage 2), the I/O controller, data-carrier store, communication control unit, display and keyboard, touch-screen and mouse, it is characterized in that instrument voltage transformer group and instrument current transformer group constitute the three-phase voltage current sampling circuit, A/D converter is connected between sample circuit and the DSP, communicating by letter between DSP and the MCU adopted the HPI data bus, 2 program storages by bus respectively with DSP, MCU connects, data-carrier store is connected with MCU by bus, display and keyboard, touch-screen and mouse all are connected in the corresponding port of the I/O controller of MCU.
2,, it is characterized in that described digital signal processor (DSP) adopts the TMS320C6711DGDPA chip according to a described electric harmonic of claim 1 and a harmonic monitoring device.
3,, it is characterized in that described A/D converter adopts the ADS8364 chip according to a described electric harmonic of claim 1 and a harmonic monitoring device.
4,, it is characterized in that described microcontroller (MCU) adopts built-in PC 104 main frames according to a described electric harmonic of claim 1 and a harmonic monitoring device.
CN 200620051198 2006-06-02 2006-06-02 Electric harmonic and interharmonic monitoring device CN2932397Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620051198 CN2932397Y (en) 2006-06-02 2006-06-02 Electric harmonic and interharmonic monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620051198 CN2932397Y (en) 2006-06-02 2006-06-02 Electric harmonic and interharmonic monitoring device

Publications (1)

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CN2932397Y true CN2932397Y (en) 2007-08-08

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100518120C (en) * 2007-10-30 2009-07-22 中国西电电气股份有限公司 An electronic mutual inductor data transmission method based on CAN bus
CN102435889A (en) * 2011-10-18 2012-05-02 中国电力科学研究院 Harmonic electric quantity type energy efficiency acquisition terminal
WO2012059061A1 (en) * 2010-11-04 2012-05-10 武汉国测恒通智能仪器有限公司 Method and device for quality-monitoring of high-voltage electrical energy
WO2013056609A1 (en) * 2011-10-18 2013-04-25 中国电力科学研究院 Electric energy quality type energy efficiency data acquisition terminal
CN103197111A (en) * 2013-01-06 2013-07-10 浙江中碳科技有限公司 Three-phase alternating current comprehensive electric quantity detecting method and detection circuit
CN103235180A (en) * 2013-04-08 2013-08-07 国家电网公司 Inter-harmonics measuring method for power grid
CN103257271A (en) * 2013-05-16 2013-08-21 南京工程学院 Device and method for detecting micro grid harmonic wave and inter-harmonics based on STM32F107VCT6
CN103424622A (en) * 2013-06-21 2013-12-04 国家电网公司 Detecting and determining method of fractional harmonic source
CN103995181A (en) * 2014-05-13 2014-08-20 武汉中元华电科技股份有限公司 Method for analyzing electric energy quality harmonic waves of digital substation
CN104330626A (en) * 2014-10-08 2015-02-04 国家电网公司 Power grid harmonic wave monitor
CN105866543A (en) * 2016-03-31 2016-08-17 济南大学 Interharmonic detection method for eliminating interference caused by fundamental waves and harmonic waves to interharmonic detection
CN109061301A (en) * 2018-10-25 2018-12-21 程海明 A kind of novel electric power system m-Acetyl chlorophosphonazo detection device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100518120C (en) * 2007-10-30 2009-07-22 中国西电电气股份有限公司 An electronic mutual inductor data transmission method based on CAN bus
WO2012059061A1 (en) * 2010-11-04 2012-05-10 武汉国测恒通智能仪器有限公司 Method and device for quality-monitoring of high-voltage electrical energy
CN102435889A (en) * 2011-10-18 2012-05-02 中国电力科学研究院 Harmonic electric quantity type energy efficiency acquisition terminal
WO2013056609A1 (en) * 2011-10-18 2013-04-25 中国电力科学研究院 Electric energy quality type energy efficiency data acquisition terminal
CN103197111A (en) * 2013-01-06 2013-07-10 浙江中碳科技有限公司 Three-phase alternating current comprehensive electric quantity detecting method and detection circuit
CN103235180B (en) * 2013-04-08 2016-02-10 国家电网公司 A kind of electrical network inter-harmonic wave measuring method
CN103235180A (en) * 2013-04-08 2013-08-07 国家电网公司 Inter-harmonics measuring method for power grid
CN103257271A (en) * 2013-05-16 2013-08-21 南京工程学院 Device and method for detecting micro grid harmonic wave and inter-harmonics based on STM32F107VCT6
CN103257271B (en) * 2013-05-16 2016-04-06 南京工程学院 A kind of micro-capacitance sensor harmonic wave based on STM32F107VCT6 and m-Acetyl chlorophosphonazo pick-up unit and detection method
CN103424622A (en) * 2013-06-21 2013-12-04 国家电网公司 Detecting and determining method of fractional harmonic source
CN103995181A (en) * 2014-05-13 2014-08-20 武汉中元华电科技股份有限公司 Method for analyzing electric energy quality harmonic waves of digital substation
CN103995181B (en) * 2014-05-13 2017-01-18 武汉中元华电科技股份有限公司 Method for analyzing electric energy quality harmonic waves of digital substation
CN104330626A (en) * 2014-10-08 2015-02-04 国家电网公司 Power grid harmonic wave monitor
CN105866543A (en) * 2016-03-31 2016-08-17 济南大学 Interharmonic detection method for eliminating interference caused by fundamental waves and harmonic waves to interharmonic detection
CN105866543B (en) * 2016-03-31 2018-08-10 济南大学 It is a kind of eliminate fundamental wave, harmonic wave to m-Acetyl chlorophosphonazo detection interference harmonic detection method
CN109061301A (en) * 2018-10-25 2018-12-21 程海明 A kind of novel electric power system m-Acetyl chlorophosphonazo detection device

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