CN205720433U - A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network - Google Patents

A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network Download PDF

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Publication number
CN205720433U
CN205720433U CN201620578926.3U CN201620578926U CN205720433U CN 205720433 U CN205720433 U CN 205720433U CN 201620578926 U CN201620578926 U CN 201620578926U CN 205720433 U CN205720433 U CN 205720433U
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China
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module
distribution network
gps
harmonics
radio sensing
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Expired - Fee Related
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CN201620578926.3U
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Chinese (zh)
Inventor
黄悦华
聂德宇
李振华
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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Abstract

A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, including current transformer, voltage transformer, described current transformer, voltage transformer connect Signal-regulated kinase respectively, Signal-regulated kinase connects frequency analysis module, frequency analysis module connects wireless transmitter module, wireless transmitter module is connected by wireless network with wireless receiving module, wireless receiving module link control module, and control module connects display module, GPS time service module.A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network of this utility model, Data Detection is accurate, easy to use, detection in real time, simple in construction, with low cost;And can be in conjunction with GPS time service module to harmonic wave on-line monitoring.

Description

A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network
Technical field
This utility model relates to field of power, and a kind of Distribution Network Harmonics based on radio sensing network is online Monitoring device.
Background technology
Along with the continuous expansion of electrical network scale, network load structure has a very large change, various non-linear, asymmetric Property, impact and uneven electrical equipment be widely used, make electrical network produces the interference of substantial amounts of harmonic wave, the electric energy matter in electrical network Amount causes serious pollution, and power factor (PF) is deteriorated, and other equipment and device are produced disturbance, the electric energy matter of serious threat electrical network Amount and the safe operation of power equipment.After impact power load puts into power distribution network operation, distribution network voltage generation ripple can be made Dynamic, thus seriously disturb the normal operation of the sensitive load such as illumination, computer, precision electronic device etc. that fluctuates in electrical network. Power quality problem once occur, the most then cause equipment fault, heavy then cause the damage of whole system, the loss thus brought is Difficult to the appraisal.Therefore, effectively in real time Distribution Network Harmonics is monitored, to guaranteeing power system security, stable operation tool It is of great significance.Due to popularity and the universality of harmonic source of distribution line distribution, existing Distribution Network Harmonics is supervised Examining system uses off-line type method Monitoring Data, the harmonic data that off-line type is unilateral during can only obtaining test, although have mostly Certain reference, directive significance, but the real-time harmonic data of the most detailed distribution line cannot be obtained for a long time.
Summary of the invention
Off-line type method Monitoring Data is mostly used, during test can only being obtained for current Harmonic Monitoring Device of Distribution Network Unilateral harmonic data, it is impossible to obtain the real-time harmonic data of the most detailed distribution line for a long time, and cannot harmonic wave cannot The problem such as it is accurately positioned.This utility model provides a kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, number , detection accurate, easy to use according to detection in real time, simple in construction, with low cost;And in conjunction with GPS time service module, harmonic wave can be existed Line is monitored.
This utility model be the technical scheme is that
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, including current transformer, mutual induction of voltage Device, described current transformer, voltage transformer connect Signal-regulated kinase, Signal-regulated kinase connection frequency analysis mould respectively Block, frequency analysis module connects wireless transmitter module, and wireless transmitter module is connected by wireless network with wireless receiving module, nothing Line receiver module link control module, control module connects display module, GPS time service module.
Described current transformer, voltage transformer are for gathering the electric current of power circuit, information of voltage, and are adjusted by signal Reason module exports to frequency analysis module.
Described frequency analysis module includes DSP, A/D modular converter, and DSP is used In reading A/D transformation result, and carry out the analysis of associated harmonic parameter, computing and process;Result passes through wireless transmit mould Block, wireless receiving module deliver to control module, and control module is used for carrying out data and processes and storage;Display module is joined for realization The real time on-line monitoring of mains by harmonics parameter;
Described GPS time service module, for the A/D transformation result that DSP is read, real by GPS time service Existing synchronous acquisition, the data that GPS time service module will gather, shown in control module by the time service passage of remote communication module On.Realize clock signal precise synchronization and data acquisition, improve the clock synchronization accuracy of accuracy and whole monitoring system.
Described DSP is TMS320F2812 type dsp chip.This processor is a by Samsung half The high-performance of conductor company release, low-power consumption, high integration microprocessor, greatly simplifie the design of peripheral circuit.The highest Operating frequency, up to 150MHz, is changed data for control in real time and reading in the short period of time, is completed the algorithm offer of complexity Sufficient condition.
Described wireless transmitter module, wireless receiving module use nRF2401 type wireless receiving and dispatching pattern block.
Described control module is made up of external memory storage, ARM chip processor and peripheral circuit, wherein at ARM chip Reason device uses S3C2440B microprocessor.
This utility model provides a kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, with existing public affairs Know that technology is compared, have the advantages that
1), compared with traditional off-line type method Monitoring Data, off-line type monitoring is unilateral humorous during can only obtaining test Wave datum, it is impossible to obtain the real-time harmonic data of the most detailed distribution line for a long time, and cannot cannot be accurately positioned by harmonic wave Etc. problem.And utilizing nRF2401 type wireless receiving and dispatching pattern block, it is possible to achieve between DSP and ARM chip, data are wirelessly transferred, energy Enough accomplish on-line monitoring.This system structure is compact, easy to realization, dependable performance, it is possible to distribution harmonic wave is carried out real-time online prison Survey, there is higher application and popularization value.
2), GPS time service module is installed, whole Harmonics Monitoring System is realized the synchronous acquisition of control signal, improve system The accuracy of the time synchronized of on-line monitoring.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
Detailed description of the invention
As it is shown in figure 1, a kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, including Current Mutual Inductance Device, voltage transformer, described current transformer, voltage transformer connect Signal-regulated kinase, Signal-regulated kinase connection respectively Frequency analysis module, frequency analysis module connects wireless transmitter module, and wireless transmitter module and wireless receiving module are by wireless Network connects, wireless receiving module link control module, and control module connects display module, GPS time service module.
Described current transformer, voltage transformer are all connected with power distribution network, the output of voltage transformer summation current transformer End is connected with Signal-regulated kinase, and tested high voltage is become by described voltage transformer summation current transformer with big current signal Being changed to the small-signal needed for A/D modular converter, voltage transformer secondary side voltage becomes 100V, and Current Transformer Secondary side becomes 5A, then after low-pass filtered device filters the High-frequency Interference in signal, send into A/D modular converter and carry out analog digital conversion.A/D modulus of conversion Block selects high-performance analog-digital converter ADS8364, utilizes 6 passages of ADS8364 to synchronize three-phase alternating voltage, electric current Sampling, the digital quantity of 16 ensure that sampling precision.
Described DSP, DSP reads A/D transformation result and carries out the analysis of associated harmonic parameter, fortune Calculate and process.DSP uses TMS320F2812 chip, and maximum operating frequency is up to 150MHz, for control in real time The algorithm making and being completed in a relatively short time complexity provides sufficient condition, and the instruction of DSP response ARM control module controls ADS8364 completes A/D conversion, reads conversion data, carries out fast Fourier transform (FFT) and relevant parameter calculates, to front end After A/D conversion, the digital signal that obtains processes, and uses fast fourier algorithm (FFT), can measure three-phase voltage UA, The subharmonic voltage of UB, UC, by several times voltage harmonic content and total voltage harmonic content;Can also measure three-phase current IA, The subharmonic electric current of IB, IC, by several times current harmonic content and total current harmonic content.
Described radio sensing network uses nRF2401 wireless transport module, selects new single chip radio-frequency receiving-transmitting device NRF2401, this device works in 2.4GHz~2.5 GHz ISM bands, output and communication channel can be carried out by programming Configuration.Meanwhile, nRF2401 is low in energy consumption, when with the power emission of-6dBm, and operating current only 9mA, when receiving signal, work electricity Stream the most only 12.3mA, is particularly suitable for single chip application occasion.Controlling nRF2401 and work in reception pattern, starting to adopt until receiving Just start after the order of collection gather and send data.After receiving the packet that DSP signal processor sends, control NRF2401 works in emission mode, is read and by sending instruction downwards, nRF2401 wireless transport module is that harmonic wave divides Analysis module DSP transmits the electric power signal collected, and once receives instruction, controls nRF2401 and works in reception pattern, receives data Bag, it is achieved be connected with Control architecture, finally data be transferred on Control architecture.
Described control module is made up of external memory storage, ARM chip processor and peripheral circuit.ARM chip uses S3C2440B microprocessor, this processor is a high-performance, low-power consumption, highly integrated released by Samsung semiconductor company Degree microprocessor, has abundant hardware resource, greatly simplifies the design of peripheral circuit.Use 4.3 cun of TFT liquid crystal simultaneously Screen is used as display, uses 2GSD card storage harmonic parameters.
Described GPS time service module includes GPS module, remote communication module.GPS time service module accepts by DSP Yu ARM chip The data of upper reaction gather gps data, send current state etc., and data acquisition module is through being connected with serial ports GPS module obtains current GPS information.GPS module model is BR-355, and remote communication module uses UT4432 wireless module. The data communication of GPS module uses serial ports to communicate, and GPS module sends out a PPS pulse per second (PPS) and a string fixed each second The information such as position, clock.GPS module receives satellite-signal, and the time synchronized being realized whole system by time service passage (RS232) is supervised Survey, realized synchronous acquisition, GPS by reading A/D transformation result by the DSP of frequency analysis by GPS time service The data gathered are shown in the control module equipped with ARM chip by the time service passage of remote communication module by time dissemination system, Realize clock signal of system precise synchronization and data acquisition.

Claims (7)

1. a Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, including current transformer, voltage transformer, It is characterized in that: described current transformer, voltage transformer connect Signal-regulated kinase respectively, Signal-regulated kinase connects harmonic wave Analyzing module, frequency analysis module connects wireless transmitter module, and wireless transmitter module and wireless receiving module pass through wireless network Connecting, wireless receiving module link control module, control module connects display module, GPS time service module.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: described current transformer, voltage transformer are for gathering the electric current of power circuit, information of voltage, and pass through signal condition mould Block exports to frequency analysis module;Described frequency analysis module includes DSP, A/D modular converter, DSP number Word signal processor is used for reading A/D transformation result, and carries out the analysis of associated harmonic parameter, computing and process;Result Delivering to control module by wireless transmitter module, wireless receiving module, control module is used for carrying out data and processes and storage;Display Module is for realizing the real time on-line monitoring of Distribution Network Harmonics parameter;Described GPS time service module, for by DSP digital signal The A/D transformation result that reason device reads, is realized synchronous acquisition by GPS time service, and the data that GPS time service module will gather, by remotely The time service passage of communication module shows in control module.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: described DSP is TMS320F2812 type dsp chip.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: described wireless transmitter module, wireless receiving module use nRF2401 type wireless receiving and dispatching pattern block.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: described control module is made up of external memory storage, ARM chip processor and peripheral circuit, wherein ARM chip processor Use S3C2440B microprocessor.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: described GPS time service module includes GPS module, remote communication module, and GPS time service module accepts by anti-on DSP Yu ARM chip The data answered, to gather gps data, send current state;Obtain current GPS by the GPS module being connected with serial ports to believe Breath.
A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network, its feature exists In: GPS module model is BR-355, and remote communication module uses UT4432 wireless module.
CN201620578926.3U 2016-06-15 2016-06-15 A kind of Distribution Network Harmonics on-Line Monitor Device based on radio sensing network Expired - Fee Related CN205720433U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107478959A (en) * 2017-09-08 2017-12-15 苏州鹿鸣智能科技有限公司 A kind of Monitoring System for Power Distribution Network and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107478959A (en) * 2017-09-08 2017-12-15 苏州鹿鸣智能科技有限公司 A kind of Monitoring System for Power Distribution Network and method

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