CN107796986A - Power transmission network second-harmonic detection device - Google Patents

Power transmission network second-harmonic detection device Download PDF

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Publication number
CN107796986A
CN107796986A CN201711214694.9A CN201711214694A CN107796986A CN 107796986 A CN107796986 A CN 107796986A CN 201711214694 A CN201711214694 A CN 201711214694A CN 107796986 A CN107796986 A CN 107796986A
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CN
China
Prior art keywords
harmonic
circuit
cabinet
cavity
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711214694.9A
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Chinese (zh)
Inventor
高志明
李艳
田骐玮
王渌
王月
修世赫
徐金涛
崔莉
王嘉熠
王菁媛
马子涵
于子凯
高伟
高伟博
龚迂祥
张颢璇
田伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longkou Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
Longkou Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Longkou Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical Longkou Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority to CN201711214694.9A priority Critical patent/CN107796986A/en
Publication of CN107796986A publication Critical patent/CN107796986A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16Spectrum analysis; Fourier analysis
    • G01R23/165Spectrum analysis; Fourier analysis using filters

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  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention discloses a kind of power transmission network second-harmonic detection device, including the cabinet that can be moved, the bottom of described cabinet is provided with a cavity, and a movable plate is provided with cavity;Side wall of the cavity at left and right sides of it is provided with fixing groove;Rack is fixedly installed in described fixing groove;Movable plate is provided with open slot in the both sides relative with rack;Gear is provided with open slot, described gear is installed on by rotating shaft in described open slot;The motor of drive gear rotation is additionally provided with described movable plate;The lower surface of the movable plate is provided with some ball bodies;Harmonic signal Acquisition Circuit, harmonic detecting analysing integrated circuits and microcontroller system circuit are provided with cabinet;The signal of collection is sent to harmonic detecting analysing integrated circuits by described harmonic signal Acquisition Circuit.The structure of the detecting device of the present invention is simple, convenient with fixed and mobile, convenient to carry.

Description

Power transmission network second-harmonic detection device
Technical field
The present invention relates to electrical equipment technical field, and in particular to a kind of power transmission network second-harmonic detection device.
Background technology
With developing rapidly for power industry, the proposition of the new problem of intelligent power network, and distribution system automation control The further research of technology, the process that distribution system automation certainly will be accelerated to control.And abnormal mains by harmonics signal influences whether The normal operation of power distribution network.
Harmonic wave Producing reason is varied.Relatively common has two classes:The first kind is due to nonlinear-load and produced Harmonic wave, such as controllable silicon(IGCT)Rectifier, Switching Power Supply etc., harmonic frequency caused by this type load are work frequency Integral multiple.Such as mainly 5 times and 7 subharmonic caused by the Pulses Rectifier of three-phase six, and 3 12 Pulses Rectifiers are produced Raw mainly 11 times and 13 subharmonic.Second class is due to inversion load and produces harmonic wave, such as intermediate frequency furnace, frequency converter, This type load not only produces integral frequency harmonizing wave, also produces the fractional harmonic that frequency is 2 times of reverse frequency.Such as:Use three-phase The intermediate frequency furnace that six Pulses Rectifiers and working frequency are 820Hz then not only produces 5 times and 7 subharmonic, and also generation frequency is 1640Hz fractional harmonic.
Harmonic wave is exactly existing while power network is born, because generator and transformer can all produce a small amount of harmonic wave. Now due to the electrical equipment for producing a large amount of harmonic waves is continuously increased, and the shunt capacitor largely used in power network is non-to harmonic wave It is often sensitive even to produce Harmonics amplification, when the harmonic current in power network is larger, so that when voltage waveform also produces distortion, just Serious electric network pollution can be caused.
The content of the invention
It is an object of the invention to provide a kind of power transmission network second-harmonic detection device, detection means detection is sensitive.
In order to solve the above-mentioned technical problem, the present invention provides following technical scheme:Power transmission network second-harmonic detection device, bag The cabinet that can be moved is included, the bottom of described cabinet is provided with a cavity, a movable plate is provided with described cavity;Described Side wall of the cavity at left and right sides of it is provided with fixing groove;Rack is fixedly installed in described fixing groove;The cavity is at it The side wall of front and rear sides is provided with guide chute;The guide runner coordinated with the guide chute is provided with the movable plate; Described movable plate is provided with open slot in the both sides relative with rack;Gear, described gear are provided with the open slot It is installed on by rotating shaft in described open slot;The motor of drive gear rotation is additionally provided with described movable plate;Institute The lower surface for stating movable plate is provided with some ball bodies;
LCDs is provided with front side of described cabinet;Cabinet door is provided with rear side of the cabinet;Described switch Cabinet door is connected by bolt with cabinet;Harmonic signal Acquisition Circuit, the integrated electricity of harmonic detecting analysis are provided with described cabinet Road and microcontroller system circuit;The signal of collection is sent to the integrated electricity of harmonic detecting analysis by described harmonic signal Acquisition Circuit Road;Described harmonic detecting analysing integrated circuits are connected with described microcontroller system circuit.
Further, the harmonic signal Acquisition Circuit includes voltage signal acquisition circuit and current signal Acquisition Circuit, The output signal of voltage signal acquisition circuit and current signal Acquisition Circuit is connected to harmonic detecting analysing integrated circuits;It is described humorous Ripple detection and analysis integrated circuit uses AD converter ic chips, and the voltage sampled, current harmonics signal are divided Pressure, shaping, are then input to microcontroller system circuit;The microcontroller system circuit includes central processing unit and peripheral circuit, Voltage after shaped, current harmonics signal are calculated, overcurrent, undercurrent electrical parameter is drawn and is output to teletransmission list Member.
Further, the microcontroller system circuit includes bidirectional transmit-receive wireless communication module, and single-chip microcomputer is by serially leading to News port connects with bidirectional transmit-receive wireless communication module, and microcontroller system circuit passes through nothing after completing the detection and analysis of harmonic content Line communication module sends corresponding instruction or pre-warning signal.
Further, it is provided with three-decker in described cabinet;Include first layer cavity, second layer cavity from top to bottom With third layer cavity;Described harmonic signal Acquisition Circuit is arranged at first layer cavity;The described integrated electricity of harmonic detecting analysis Road is arranged at second layer cavity;Described microcontroller system circuit is arranged at third layer cavity.
Further, it is additionally provided with signal between described harmonic signal Acquisition Circuit, harmonic detecting analysing integrated circuits Modulate circuit;Described signal conditioning circuit includes signal conditioning circuit, voltage follower circuit and the filter circuit being sequentially connected with, The input of signal conditioning circuit is used to receive voltage, the current signal that harmonic signal Acquisition Circuit is gathered;Filter circuit Output end connects harmonic detecting analysing integrated circuits.
Further, the both sides of the cabinet are provided with around line chamber, and described coiling intracavitary is provided with roll;Described The fixing clamp for fixing wire is provided with roll;Described roll stretching is described to revolve on the outside of line chamber with coiling Button connects.
The beneficial effect that is reached of the present invention is:The power transmission network second-harmonic detection device of the present invention, including can move Cabinet, the bottom of described cabinet are provided with a cavity, and a movable plate is provided with cavity;Side wall of the cavity at left and right sides of it It is provided with fixing groove;Rack is fixedly installed in described fixing groove;Movable plate is provided with opening in the both sides relative with rack Groove;Gear is provided with open slot, described gear is installed on by rotating shaft in described open slot;On described movable plate also It is provided with the motor of drive gear rotation;The lower surface of the movable plate is provided with some ball bodies;It is provided with cabinet Harmonic signal Acquisition Circuit, harmonic detecting analysing integrated circuits and microcontroller system circuit;Described harmonic signal Acquisition Circuit The signal of collection is sent to harmonic detecting analysing integrated circuits;Described harmonic detecting analysing integrated circuits and described monolithic Machine circuit system connects.The structure of the detecting device of the present invention is simple, convenient with fixed and mobile, convenient to carry.
Brief description of the drawings
In order to more clearly illustrate the technical scheme in the embodiment of the present invention, will use below required in embodiment Accompanying drawing is simply introduced, it should be apparent that, drawings in the following description are only some embodiments described in the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.
Fig. 1 is the rearview of the present invention.
Fig. 2 is the rearview of cavity.
Fig. 3 is the side view of cavity.
Fig. 4 is the structural representation of movable plate.
Fig. 5 is coiling chamber internal structure schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes.
As Figure 1-5, power transmission network second-harmonic detection device, including the cabinet 1 that can be moved, the bottom of described cabinet 1 Portion is provided with a cavity 101, and a movable plate 7 is provided with described cavity 101;Described cavity 101 is at left and right sides of it Side wall is provided with fixing groove 102;Rack 103 is fixedly installed in described fixing groove 102;The cavity 101 its front and rear two The side wall of side is provided with guide chute 104;The guide runner coordinated with the guide chute 104 is provided with the movable plate 7 105;Described movable plate 7 is provided with open slot 106 in the both sides relative with rack 103;Set in the open slot 106 with teeth Wheel 107, described gear 107 are installed on by rotating shaft 108 in described open slot 106;It is additionally provided with described movable plate 7 The motor 109 that drive gear rotates;The lower surface of the movable plate 7 is provided with some ball bodies 110;
The front side of described cabinet 1 is provided with LCDs;The rear side of the cabinet 1 is provided with cabinet door 112;Described Cabinet door 112 is connected by bolt with cabinet 1;Harmonic signal Acquisition Circuit 2, harmonic detecting are provided with described cabinet 1 Analysing integrated circuits 3 and microcontroller system circuit 4;The signal of collection is sent to harmonic wave by described harmonic signal Acquisition Circuit 2 Test and analyze integrated circuit 3;Described harmonic detecting analysing integrated circuits 3 are connected with described microcontroller system circuit 4.
Further, the harmonic signal Acquisition Circuit 2 includes voltage signal acquisition circuit and current signal Acquisition Circuit, The output signal of voltage signal acquisition circuit and current signal Acquisition Circuit is connected to harmonic detecting analysing integrated circuits 3;It is described Harmonic detecting analysing integrated circuits use AD converter ic chips, and the voltage sampled, current harmonics signal are divided Pressure, shaping, are then input to microcontroller system circuit 4;The microcontroller system circuit 4 includes central processing unit and periphery electricity Road, the voltage after shaped, current harmonics signal are calculated, overcurrent, undercurrent electrical parameter is drawn and is output to teletransmission Unit.
Further, the microcontroller system circuit 4 includes bidirectional transmit-receive wireless communication module, and single-chip microcomputer is by serially leading to News port connects with bidirectional transmit-receive wireless communication module, and microcontroller system circuit passes through nothing after completing the detection and analysis of harmonic content Line communication module sends corresponding instruction or pre-warning signal.
Further, it is provided with three-decker in described cabinet 1;Include first layer cavity 11, the second layer from top to bottom Cavity 12 and third layer cavity 13;Described harmonic signal Acquisition Circuit 2 is arranged at first layer cavity 11;Described harmonic detecting Analysing integrated circuits 3 are arranged at second layer cavity 12;Described microcontroller system circuit 4 is arranged at third layer cavity 13.
Further, it is additionally provided with letter between described harmonic signal Acquisition Circuit 2, harmonic detecting analysing integrated circuits 3 Number modulate circuit;Described signal conditioning circuit includes signal conditioning circuit, voltage follower circuit and the filtered electrical being sequentially connected with Road, the input of signal conditioning circuit are used to receive voltage, the current signal that harmonic signal Acquisition Circuit 2 is gathered;Filtered electrical The output end connection harmonic detecting analysing integrated circuits 3 on road.
Further, the both sides of the cabinet 1 are provided with around line chamber 6, described that roll 61 is provided with line chamber 6; The fixing clamp 62 for fixing wire is provided with described roll 61;Described roll 61 stretches out described around line chamber 6 outsides are connected with coiling knob 63.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the design of the present invention It is defined with scope, on the premise of design concept of the present invention is not departed from, ordinary skill technical staff is to this hair in this area The all variations and modifications that bright technical scheme is made all should fall into protection scope of the present invention, claimed skill of the invention Art content, all it is documented in technical requirements book.

Claims (6)

1. power transmission network second-harmonic detection device, it is characterised in that:Including the cabinet that can be moved(1), described cabinet(1)Bottom Portion is provided with a cavity(101), described cavity(101)Inside it is provided with a movable plate(7);Described cavity(101)It is left at it The side wall of right both sides is provided with fixing groove(102);Described fixing groove(102)Inside it is fixedly installed rack(103);The cavity (101)Side wall in its front and rear sides is provided with guide chute(104);The movable plate(7)On be provided with and it is described be oriented to slide Groove(104)The guide runner of cooperation(105);Described movable plate(7)With rack(103)Relative both sides are provided with open slot (106);The open slot(106)Inside it is provided with gear(107), described gear(107)Pass through rotating shaft(108)It is installed on described Open slot(106)It is interior;Described movable plate(7)On be additionally provided with drive gear rotation motor(109);The movement Plate(7)Lower surface be provided with some ball bodies(110);
Described cabinet(1)Front side be provided with LCDs;The cabinet(1)Rear side be provided with cabinet door(112); Described cabinet door(112)Pass through bolt and cabinet(1)Connection;Described cabinet(1)Inside it is provided with harmonic signal collection electricity Road(2), harmonic detecting analysing integrated circuits(3)And microcontroller system circuit(4);Described harmonic signal Acquisition Circuit(2)Will The signal of collection is sent to harmonic detecting analysing integrated circuits(3);Described harmonic detecting analysing integrated circuits(3)With it is described Microcontroller system circuit(4)Connection.
2. power transmission network second-harmonic detection device according to claim 1, it is characterised in that:The harmonic signal collection electricity Road(2)Including voltage signal acquisition circuit and current signal Acquisition Circuit, voltage signal acquisition circuit and current signal collection electricity The output signal on road is connected to harmonic detecting analysing integrated circuits(3);The harmonic detecting analysing integrated circuits are changed using AD IC chip, the voltage sampled, current harmonics signal are subjected to partial pressure, shaping, are then input to SCM system electricity Road(4);The microcontroller system circuit(4)Including central processing unit and peripheral circuit, to the voltage after shaped, current harmonics Signal is calculated, and is drawn overcurrent, undercurrent electrical parameter and is output to remote transmission unit.
3. power transmission network second-harmonic detection device according to claim 2, it is characterised in that:The microcontroller system circuit (4)Including bidirectional transmit-receive wireless communication module, single-chip microcomputer is connected by COM with bidirectional transmit-receive wireless communication module, The detection that microcontroller system circuit completes harmonic content is believed with sending corresponding instruction or early warning by wireless communication module after analysis Number.
4. power transmission network second-harmonic detection device according to claim 3, it is characterised in that:Described cabinet(1)Inside set It is equipped with three-decker;Include first layer cavity from top to bottom(11), second layer cavity(12)With third layer cavity(13);Described Harmonic signal Acquisition Circuit(2)It is arranged at first layer cavity(11);Described harmonic detecting analysing integrated circuits(3)It is arranged at Two layers of cavity(12);Described microcontroller system circuit(4)It is arranged at third layer cavity(13).
5. power transmission network second-harmonic detection device according to claim 4, it is characterised in that:Described harmonic signal collection Circuit(2), harmonic detecting analysing integrated circuits(3)Between be additionally provided with signal conditioning circuit;Described signal conditioning circuit bag The signal conditioning circuit being sequentially connected with, voltage follower circuit and filter circuit are included, the input of signal conditioning circuit is used to receive Harmonic signal Acquisition Circuit(2)Voltage, the current signal gathered;The output end connection harmonic detecting analysis of filter circuit is integrated Circuit(3).
6. power transmission network second-harmonic detection device according to claim 5, it is characterised in that:The cabinet(1)Both sides It is provided with around line chamber(6), it is described around line chamber(6)Inside it is provided with roll(61);Described roll(61)On be provided with use In the fixing clamp of fixed wire(62);Described roll(61)Stretch out described around line chamber(6)Outside and coiling knob (63)Connection.
CN201711214694.9A 2017-11-28 2017-11-28 Power transmission network second-harmonic detection device Pending CN107796986A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711214694.9A CN107796986A (en) 2017-11-28 2017-11-28 Power transmission network second-harmonic detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711214694.9A CN107796986A (en) 2017-11-28 2017-11-28 Power transmission network second-harmonic detection device

Publications (1)

Publication Number Publication Date
CN107796986A true CN107796986A (en) 2018-03-13

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CN201711214694.9A Pending CN107796986A (en) 2017-11-28 2017-11-28 Power transmission network second-harmonic detection device

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0843459A (en) * 1994-08-04 1996-02-16 Mitsubishi Denki Bill Techno Service Kk High-harmonic content monitoring device
EP0826972A2 (en) * 1996-08-28 1998-03-04 Matsushita Electric Industrial Co., Ltd. Harmonic measurement system
CN101873010A (en) * 2010-07-14 2010-10-27 河南龙杰电气有限公司 Intelligent monitoring terminal of electric distribution system
CN103499740A (en) * 2013-09-30 2014-01-08 河南开启电力实业有限公司 Online detection device for power grid harmonic waves
CN103516052A (en) * 2013-10-12 2014-01-15 河南开启电力实业有限公司 Power distribution equipment on-line monitoring early-warning terminal
CN207472964U (en) * 2017-11-28 2018-06-08 国网山东省电力公司龙口市供电公司 Power transmission network second-harmonic detection device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0843459A (en) * 1994-08-04 1996-02-16 Mitsubishi Denki Bill Techno Service Kk High-harmonic content monitoring device
EP0826972A2 (en) * 1996-08-28 1998-03-04 Matsushita Electric Industrial Co., Ltd. Harmonic measurement system
CN101873010A (en) * 2010-07-14 2010-10-27 河南龙杰电气有限公司 Intelligent monitoring terminal of electric distribution system
CN103499740A (en) * 2013-09-30 2014-01-08 河南开启电力实业有限公司 Online detection device for power grid harmonic waves
CN103516052A (en) * 2013-10-12 2014-01-15 河南开启电力实业有限公司 Power distribution equipment on-line monitoring early-warning terminal
CN207472964U (en) * 2017-11-28 2018-06-08 国网山东省电力公司龙口市供电公司 Power transmission network second-harmonic detection device

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Application publication date: 20180313