CN206892187U - A kind of AC harmonic source - Google Patents
A kind of AC harmonic source Download PDFInfo
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- CN206892187U CN206892187U CN201720823538.1U CN201720823538U CN206892187U CN 206892187 U CN206892187 U CN 206892187U CN 201720823538 U CN201720823538 U CN 201720823538U CN 206892187 U CN206892187 U CN 206892187U
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- pwm controller
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Abstract
The utility model provides a kind of AC harmonic source, including transformer, rectifier, inverter, wave filter and the power amplifier being sequentially connected electrically, the connection voltage follower circuit of output end all the way of power amplifier；Output end is connected with Power Quality Detection module to power amplifier all the way, Power Quality Detection module output end accesses PWM controller, PWM controller is the control centre of whole supply unit, the output end of PWM controller is connected with rectification mould and inverter, PWM controller is also associated with host computer and Power Quality Detection module, each harmonic amount and electric current, voltage distortion rate are detected by Power Quality Detection module, host computer is transferred data to by PWM controller.The utility model is tested each performance parameter of the test product in the presence of various harmonic waves by analog study, product to be tested is preferably applied in power system, so as to solve the harmonic pollution problems of power electronic equipment and other harmonic sources.
Description
Technical field
The utility model belongs to Power Quality Detection field, and in particular to a kind of AC harmonic source.
Background technology
With the fast development of Power Electronic Technique, various power electronic devices have been applied to the every of automation industry
One corner, the electrical equipment of nonlinear characteristic, the switch power supply equipment based on power electronic element etc. in power system
Increasing, the direct performance of its influence to electric device is electric current and voltage waveform produces cyclic distortion, in power network
Harmonic content is more and more, makes harmonic pollution in electric power net getting worse.The harm of Harmonic in Power System is great, and harmonic wave is not only
Make the production, transmission and the efficiency reduction utilized of electric energy, make device of overheating of electrical, produce vibration and noise, and make insulation ag(e)ing,
Service life shortens, and even equipment can be also damaged when serious；Harmonic wave can cause power system minor loop parallel resonance or series connection
Resonance, make the equipment burnouts such as the capacitor in minor loop, reactor；Harmonic wave can also cause relay protection and automatics malfunction
Make, electric energy metrical is caused confusion.
Therefore, harmonic wave control, which seems, becomes more and more important, and harmonic detecting is the basis for solving harmonic problem, because electric device
The type of middle harmonic source is more, distribution is wide, if before harmonic wave control, researches and develops a kind of equipment that can produce various harmonic waves, comes
Pollution of the harmonic wave to power network and electrical equipment caused by simulating grid or power electric component, so as to each harmonic
Distribution, content and its start/stop time occurred can be grasped clearly, harmonic wave administered with being distinguish between, will reduced
The difficulty of improvement.
Utility model content
The purpose of this utility model is in place of overcome the deficiencies in the prior art, there is provided a kind of AC harmonic source, for examining
Kernel analysis equipment under test power network adaptability.
To achieve the above object, concrete technical scheme of the present utility model is as follows：A kind of AC harmonic source, including transformation
Device, rectifier, inverter, wave filter, power amplifier, PWM controller and Power Quality Detection module；
The input of the transformer is connected with external electrical network, and transformer output end is connected with rectifier input, rectification
Alternating current input is converted to direct current by device, provides dc source for inverter, rectifier output end connection inverter input terminal is inverse
Become device output end to be connected with filter input end, wave filter is used to filter out the higher hamonic wave contained in inverter output, wave filter
Output end is connected with power amplifier input, and output end connects voltage follower circuit, power amplifier to power amplifier all the way
Output end is connected with Power Quality Detection module input all the way, Power Quality Detection module output end access PWM controller, institute
State the control centre that PWM controller is whole supply unit, the output end of PWM controller respectively with the rectifier and inverter
It is connected.
Described PWM controller is also connected with host computer by ethernet communication interface.
Described host computer is communicated by RS485 communication interfaces with Power Quality Detection module.
Described Power Quality Detection module includes data acquisition module, signal processing module, the data acquisition module
Detected in real time for a pair electric current for the load electrically connected with external electrical network, signal processing module is used for the load electricity to detection
Stream is handled and calculated, and calculates the harmonic components contained by load current, and the above-mentioned value detected is exported to PWM and controlled
Device processed；The input of the data acquisition module is connected with power amplifier output, the output end and letter of data acquisition module
The connection of number processing module input, signal processing module output end are connected with PWM controller input.
Described data acquisition module includes voltage sensor and current sensor.
Described PWM controller is connected by drive circuit with inverter.
Pass through above-mentioned technical proposal, the beneficial effects of the utility model are：
The utility model provides the test apparatus that can produce multiple harmonic, and test product is tested various by analog study
Each performance parameter in the presence of harmonic wave, makes product to be tested preferably apply in power system, so as to solve power electronics
The harmonic pollution problems of device and other harmonic sources.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Description of reference numerals
1st, transformer, 2, rectifier, 3, inverter, 4, wave filter, 5, power amplifier, 6, PWM controller, 7, electric energy matter
Measure detection module, 8, host computer, 9, voltage follower circuit.
Embodiment
Embodiment 1
As shown in figure 1, a kind of AC harmonic source, including transformer 1, rectifier 2, inverter 3, wave filter 4, power amplification
Device 5, PWM controller 6 and Power Quality Detection module 7；
The input of the transformer 1 is connected with external electrical network, and the output end of transformer 1 is connected with the input of rectifier 2, whole
Alternating current input is converted to direct current by stream device 2, provides dc source for inverter 3, the output end of rectifier 2 connection inverter 3 is defeated
Enter end, the output end of inverter 3 is connected with the input of wave filter 4, and wave filter 4 is used to filter out the high order contained during inverter 3 exports
Harmonic wave, the output end of wave filter 4 are connected with the input of power amplifier 5, the tunnel output end connection voltage output electricity of power amplifier 5 one
Road 9, it is that the road voltage of three-phase six is defeated that power amplifier 5, which mainly completes boosting or up-flow and power amplification, the voltage follower circuit,
Go out circuit；The tunnel output end of power amplifier 5 one is connected with the input of Power Quality Detection module 7, and Power Quality Detection module 7 is defeated
Go out to terminate into PWM controller 6, the PWM controller 6 is the control centre of whole supply unit, the output end of PWM controller 6
It is connected with the rectifier 2, while the output end of PWM controller 6 is connected by drive circuit with inverter, drive circuit is used for
Driving and control of the PWM controller 6 to inverter.PWM controller 6 sends control instruction signal and driven after drive circuit amplifies
IGBT in inverter 3, so as to the output of control system；The DSP control module is also associated with host computer 8 and the quality of power supply
Detection module 7, each harmonic amount and electric current, voltage distortion rate are detected by Power Quality Detection module 7, by PWM
Controller transfers data to host computer by ethernet communication interface, and host computer configuration interface being capable of showing real-time wave, electricity
Press the data such as aberration rate, current distortion rate and each harmonic amount.
Embodiment 2
On the basis of embodiment 1, external communication electricity is usually the 220V alternating currents from power network, and 220V AC powers are defeated
Enter transformer 1, enter rectifier 1 after the boosting of transformer 1, AC rectification is turned into direct current by rectifier 2, is inverter 3
Dc source is provided, is exported by inverter 3 and after filtered device 4 filters out useless medium-high frequency interference signal, is exported to power and put
Big device 5, power amplifier 5 mainly complete boosting or up-flow and power amplification, the output end of power amplifier 5 connection voltage output electricity
Road, the voltage follower circuit are the road voltage follower circuit of three-phase six, and the AC signal after power amplifier 5 amplifies is connected to voltage
Output circuit exports, while the electric signal of voltage output also is delivered into Power Quality Detection module 7 carries out voltage x current data and adopt
Collection, and handled by signal processing module, signal is then fed back into PWM controller 6.
PWM controller 6 is the control centre of whole supply unit, and PWM controller 6 connects the inversion by drive circuit
Device 3, PWM controller 6 send control instruction signal and IGBT in inverter 3 are driven after drive circuit amplifies, and are so as to control
The output of system；The DSP control module is also associated with host computer 8 and Power Quality Detection module 7, described PWM controller
It is connected by ethernet communication interface with host computer, the host computer passes through RS485 communication interfaces and Power Quality Detection module
Communicated, show the power quality parameter measured, and unusual condition is recorded.The Power Quality Detection module is used for
Electrical energy parameter is detected, wherein electrical energy parameter includes the fluctuation and flickering of the harmonic wave, voltage of electric current and voltage.Described electricity
Can quality detection module include data acquisition module, signal processing module, the data acquisition module include voltage sensor and
Current sensor, the electric current that data acquisition module is used for pair load electrically connected with external electrical network is detected in real time, at signal
Reason module is used to the load current of detection is handled and calculated, and calculates the harmonic components contained by load current, and will
The above-mentioned value detected is exported to PWM controller；The input of the data acquisition module is connected with power amplifier output,
The output end of data acquisition module is connected with signal processing module input, signal processing module output end access PWM controller.
PWM controller controls rectifier, and filtered device 4 is filtered out during inverter 3 exports after the higher hamonic wave that contains by power amplifier 5
Complete boosting or up-flow and power amplification, the direct-connected road voltage follower circuit output A phase voltages of three-phase six, B phase voltages, C phase voltages.
Wherein drive circuit, the road voltage follower circuit of three-phase six are known common circuit, are not described in detail herein.
Each harmonic amount and electric current, voltage distortion rate are detected by Power Quality Detection module 7, is controlled by PWM
Device processed transfers data to host computer by ethernet communication interface, and host computer configuration interface being capable of showing real-time wave, voltage
The data such as aberration rate, current distortion rate and each harmonic amount.
A kind of AC harmonic source provided by the utility model, work of the test product in various harmonic waves is tested by analog study
Each performance parameter under, makes product to be tested preferably apply in power system, so as to solve power electronic equipment and its
The harmonic pollution problems of his harmonic source.
In the present embodiment, PWM controller, signal processing module are prior art, and above example does not describe in detail
Part and the structure category industry well-known components and common structure or conventional means, do not describe one by one here.
Exemplified as above is only for example, not forming to the scope of protection of the utility model to of the present utility model
Limitation, it is every to be belonged to the same or analogous design of the utility model within protection scope of the present invention.
Claims (6)
- A kind of 1. AC harmonic source, it is characterised in that：Including transformer (1), rectifier (2), inverter (3), wave filter (4), Power amplifier (5), PWM controller (6) and Power Quality Detection module (7)；The input of the transformer (1) is connected with external electrical network, and transformer (1) output end is connected with rectifier (2) input, Rectifier (2) output end connects inverter (3) input, and inverter (3) output end is connected with wave filter (4) input, filters Device (4) output end is connected with power amplifier (5) input, and output end connects voltage follower circuit to power amplifier (5) all the way (9), output end is connected power amplifier (5) with Power Quality Detection module (7) input all the way, Power Quality Detection module (7) output end access PWM controller (6), the PWM controller (6) be whole supply unit control centre, PWM controller (6) output end is connected with the rectifier (2) and inverter (3) respectively.
- A kind of 2. AC harmonic source according to claim 1, it is characterised in that：Described PWM controller (6) also by with Too Netcom's communication interface is connected with host computer (8).
- A kind of 3. AC harmonic source according to claim 2, it is characterised in that：Described host computer (8) is led to by RS485 Communication interface is communicated with Power Quality Detection module (7).
- A kind of 4. AC harmonic source according to claim 3, it is characterised in that：Described Power Quality Detection module (7) Including data acquisition module, signal processing module, the data acquisition module is used for pair load electrically connected with external electrical network Electric current is detected in real time, and signal processing module is used to the load current of detection is handled and calculated, and calculates load electricity The contained harmonic components of stream, and the above-mentioned value detected is exported to PWM controller；The input of the data acquisition module It is connected with power amplifier (5) output end, the output end of data acquisition module is connected with signal processing module input, at signal Reason module output end is connected with PWM controller (6) input.
- A kind of 5. AC harmonic source according to claim 4, it is characterised in that：Described data acquisition module includes voltage Sensor and current sensor.
- A kind of 6. AC harmonic source according to claim 1, it is characterised in that：Described PWM controller (6) passes through driving Circuit is connected with inverter (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720823538.1U CN206892187U (en) | 2017-07-07 | 2017-07-07 | A kind of AC harmonic source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720823538.1U CN206892187U (en) | 2017-07-07 | 2017-07-07 | A kind of AC harmonic source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892187U true CN206892187U (en) | 2018-01-16 |
Family
ID=61296433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720823538.1U Expired - Fee Related CN206892187U (en) | 2017-07-07 | 2017-07-07 | A kind of AC harmonic source |
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| Country | Link |
|---|---|
| CN (1) | CN206892187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061502A (en) * | 2019-04-24 | 2019-07-26 | 千黎（苏州）电源科技有限公司 | Multiple-harmonic injection control system and method |
| CN112540272A (en) * | 2020-11-23 | 2021-03-23 | 重庆大学 | System and method for simulating mechanical vibration abnormal sound defect of GIS (gas insulated switchgear) |
-
2017
- 2017-07-07 CN CN201720823538.1U patent/CN206892187U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061502A (en) * | 2019-04-24 | 2019-07-26 | 千黎（苏州）电源科技有限公司 | Multiple-harmonic injection control system and method |
| CN112540272A (en) * | 2020-11-23 | 2021-03-23 | 重庆大学 | System and method for simulating mechanical vibration abnormal sound defect of GIS (gas insulated switchgear) |
| CN112540272B (en) * | 2020-11-23 | 2024-04-02 | 重庆大学 | GIS equipment mechanical vibration abnormal sound defect simulation system and method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 Termination date: 20200707 |