CN108461022A - A kind of power quality demo platform and its operation method - Google Patents
A kind of power quality demo platform and its operation method Download PDFInfo
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- CN108461022A CN108461022A CN201710091179.XA CN201710091179A CN108461022A CN 108461022 A CN108461022 A CN 108461022A CN 201710091179 A CN201710091179 A CN 201710091179A CN 108461022 A CN108461022 A CN 108461022A
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Abstract
The present invention proposes power quality demo platform and its operation method, including：Reactive-load compensation effect demo platform, reactive-load compensation effect demo platform include accessing the reactive load of power grid by breaker and accessing the reactive compensation module of power grid by breaker, and the output end of reactive compensation module is connected with display module；Harmonic wave control effect demo platform, harmonic wave control effect demo platform include accessing the harmonic source load of power grid by breaker and accessing the harmonic wave control module of power grid by breaker, and the output end of harmonic wave control module is connected with display module；Three-phase imbalance compensation effect demo platform, three-phase imbalance compensation effect demo platform includes accessing the three-phase imbalance load of power grid by breaker and accessing the three-phase imbalance abatement modules of power grid by breaker, and the output end of three-phase imbalance abatement modules is connect with display module.The low effect carried out before and after reactive-load compensation and three-phase imbalance compensation of harmonic current managing, power factor is more visually demonstrated.
Description
Technical field
The present invention relates to Power Quality Detection demonstration field more particularly to a kind of power quality demo platform and its operation sides
Method.
Background technology
With the development of power electronic technique, the power electronic equipments such as various rectifiers are in industry, communications and transportation and household
Application in electric appliance is increasingly extensive, and in power distribution network, due to each opposite sex of power load, electric harmonic, idle and three-phase are uneven
The various problems of the power qualities such as weighing apparatus are often and deposit, they can bring a variety of harm to power grid and power consumer.With height
The development of scientific and technological industry, requirement of the power consumer to power quality is higher and higher, while more advanced equipment is to power quality
It is required that also higher, this proposes prodigious challenge to supplier of electricity.But meanwhile power quality problem is mainly again in low-voltage network
Caused by electric load.As previously mentioned, the current qualities such as Load harmonic electric current, reactive current and three phase unbalance current are asked
Topic can cause the quality of voltage problem such as voltage distortion, under-voltage and imbalance of three-phase voltage simultaneously.It therefore will be from basic
Upper improvement power quality, other than requiring the electric energy that supplier of electricity provides high quality, it is often more important that those pollution power qualities
Load carry out local compensation and improvement.
At present most of demo platform cannot to export active, harmonic wave and the progress of unbalanced improvements compensation effect compared with
Intuitively to demonstrate.
Invention content
The purpose of the present invention is to provide a kind of power quality demo platform and its operation methods, more can intuitively drill
Show the effect administered before and after power quality, including harmonic wave control effect, reactive-load compensation effect and three-phase imbalance compensation effect.
To achieve the above object, power quality demo platform proposed by the present invention, including：
Reactive-load compensation effect demo platform, the reactive-load compensation effect demo platform include accessing power grid by breaker
Reactive load and the reactive compensation module that power grid is accessed by breaker, one display of output end connection of the reactive compensation module
Module；
Harmonic wave control effect demo platform, the harmonic wave control effect demo platform include accessing power grid by breaker
Harmonic source loads and is accessed by breaker the harmonic wave control module of power grid, and the output end connection one of the harmonic wave control module is aobvious
Show module；
Three-phase imbalance compensation effect demo platform, the three-phase imbalance compensation effect demo platform include passing through open circuit
Device accesses the three-phase imbalance load of power grid and accesses the three-phase imbalance abatement modules of power grid by breaker, and the three-phase is not
The output end for balancing abatement modules connects a display module.
Further, in the power quality demo platform, the reactive load is carried by reactor and wire resistor
It constitutes.
Further, in the power quality demo platform, the harmonic source load is filled by wire resistor and rectifier bridge
Carrying is set to constitute.
Further, in the power quality demo platform, the three-phase imbalance load builds structure by wire resistor
At.
Further, in the power quality demo platform, the display module include oscillograph and with the oscillography
The connected display screen of device.
Further, in the power quality demo platform, the oscillograph is clipped in by current clamp on power grid.
The invention also provides a kind of operation methods of power quality demo platform, using any one electricity described above
Effect is demonstrated before and after energy quality demo platform carries out power quality controlling, is included the following steps：
The first step：All breakers are in gate-dividing state；
Second step：Reactive-load compensation effect demo platform is run,
A) reactive load is accessed power grid by close circuit breaker, and the power factor of power grid is checked by oscillograph；
B) reclose breaker and reactive compensation module accessed into power grid, and run reactive compensation module, by oscillograph and
Display screen checks the power factor after compensation again；
C) breaker that reactive load is connected with reactive compensation module is in gate-dividing state；
Third walks：Harmonic wave control effect demo platform is run,
A) harmonic source is loaded access power grid by close circuit breaker, and the current wave of a large amount of harmonic waves is contained by oscilloscope
Shape；
B) it recloses breaker and harmonic wave control module is accessed into power grid, run harmonic wave control module, by oscillograph and show
Display screen checks the current waveform after administering；
C) breaker that harmonic source load is connected with harmonic wave abatement modules is in gate-dividing state；
4th step：Three-phase imbalance compensation effect demo platform is run,
A) three-phase imbalance load is accessed power grid by close circuit breaker, and the electricity of each phase is observed by oscillograph and display screen
Stream；
B) it recloses breaker and three-phase imbalance abatement modules is accessed into power grid, and run three-phase imbalance abatement modules,
Check the effect after administering three-phase imbalance again by oscillograph and display screen；
C) breaker of three-phase imbalance load and three-phase imbalance abatement modules is finally in gate-dividing state.
Compared with prior art, the beneficial effects of the invention are as follows：Harmonic current managing, power factor are more visually demonstrated
The low effect carried out before and after reactive-load compensation and three-phase imbalance compensation.
Description of the drawings
Fig. 1 is a kind of schematic diagram of power quality demo platform of the present invention.
Specific implementation mode
The power quality demo platform and its operation method of the present invention are retouched in more detail below in conjunction with schematic diagram
It states, which show the preferred embodiment of the present invention, it should be appreciated that those skilled in the art can change described here hair
It is bright, and still realize the advantageous effects of the present invention.Therefore, following description should be understood as the wide of those skilled in the art
It is general to know, and it is not intended as limitation of the present invention.
It can be reached by controlling the make and breaks of six circuit breakers respectively in power quality demo platform proposed by the present invention
The effect after harmonic wave control, reactive-load compensation and three-phase imbalance compensation is demonstrated, and the effect before and after entire improvement is by display module
Intuitive display.
Specifically, as shown in Figure 1, power quality demo platform includes mainly three mutually independent platforms：Reactive-load compensation
Effect demo platform, harmonic wave control effect demo platform and three-phase imbalance compensation effect demo platform.
In the present embodiment, reactive-load compensation effect demo platform include by breaker 2 access power grid reactive load and
The reactive compensation module (SVG) of power grid is accessed by breaker 1, the output end of reactive compensation module is connected with display module,
In, reactive load is made of reactor and wire resistor carrying.
Harmonic wave control effect demo platform includes by the harmonic source load of the access power grid of breaker 5 and by breaker 4
The harmonic wave control modules A PF of power grid is accessed, and the output end of harmonic wave control modules A PF is connected with display module, wherein harmonic source
Load is made of wire resistor and rectifier bridge device carrying.
Three-phase imbalance compensation effect demo platform is by the three-phase imbalance load of the access power grid of breaker 6 and by disconnected
Road device 3 accesses the three-phase imbalance abatement modules SPC of power grid, and the output end of three-phase imbalance abatement modules SPC and display mould
Block connects, wherein three-phase imbalance load is built by wire resistor and constituted.
Display module in above-mentioned power quality demo platform includes oscillograph and the display screen that is connected with oscillograph,
In, oscillograph is clipped in by current clamp in any one phase in power grid, being capable of the ginsengs such as display waveform, power factor and each phase current
Number, display screen more can intuitively show each design parameter.
After the completion of power quality demo platform is built, can be run in accordance with the following steps, successively demonstrate harmonic wave control,
Effect after reactive-load compensation and three-phase imbalance compensation, it is specific as follows：
The first step：1~breaker of breaker 6 is set to be in gate-dividing state；
Second step：Run reactive-load compensation effect demo platform；A) close circuit breaker 2 by reactive load i.e. by reactor and around
Line resistance load access power grid, the power factor of power grid is checked by the oscillograph of display module；B) breaker 1 is reclosed by nothing
Work(compensating module accesses power grid, and runs reactive compensation module SVG, reactive-load compensation is carried out to power grid, then again by display
The oscillograph and display screen of module check the power factor after compensation；C) open circuit for connecting reactive load with reactive compensation module
Device 1 and breaker 2 are in gate-dividing state；
Third walks：Run harmonic wave control effect demo platform；A) harmonic source is loaded access power grid by close circuit breaker 5, is led to
Cross the current waveform that oscilloscope contains a large amount of harmonic waves；B) it recloses breaker 4 and harmonic wave control modules A PF is accessed into power grid,
Harmonic wave control module is run, the current waveform after administering is checked by oscillograph and display screen；C) by harmonic source load and harmonic wave
The breaker 5 and breaker 4 of abatement modules connection are in gate-dividing state；
4th step：Run three-phase imbalance compensation effect demo platform；A) close circuit breaker 6 connects three-phase imbalance load
Enter power grid, the electric current of each phase is observed by the oscillograph and display screen of display module；B) breaker 3 is reclosed by three-phase imbalance
Abatement modules SPC accesses power grid, and runs three-phase imbalance abatement modules, and improvement three is checked again by oscillograph and display screen
The mutually effect after imbalance；C) breaker of three-phase imbalance load and three-phase imbalance abatement modules is finally in separating brake
State.
The operation of power quality platform through the above steps can be realized more intuitively by 6 circuit breakers to electric energy
Resultant effect after quality controlling is demonstrated.It utilizes wire resistor and rectifier bridge device to carry into harmonic source, uses oscillograph
Current waveform of the displaying containing a large amount of harmonic waves, runs module harmonic wave control modules A PF, observes display module and display screen, demonstration
Effect after improvement.Carried into reactive source using reactor and wire resistor, by display module and display screen observe power because
Number runs module reactive compensation module SVG, the power factor after observation improves again, the effect after demonstration compensation.Utilize coiling
Resistance is built into three-phase imbalance source, and the electric current of each phase is observed by display module and display screen, runs module three-phase imbalance
Abatement modules SPC observes the electric current of each phase again by display module and display screen, demonstrates the effect after three-phase equilibrium.
To sum up, in the power quality demo platform provided in embodiments of the present invention, harmonic current has more been visually demonstrated
It administers, the low effect carried out before and after reactive-load compensation and three-phase imbalance compensation of power factor.
The preferred embodiment of the present invention is above are only, does not play the role of any restrictions to the present invention.Belonging to any
Those skilled in the art, in the range of not departing from technical scheme of the present invention, to the invention discloses technical solution and
Technology contents make the variations such as any type of equivalent replacement or modification, belong to the content without departing from technical scheme of the present invention, still
Within belonging to the scope of protection of the present invention.
Claims (7)
1. a kind of power quality demo platform, which is characterized in that including：
Reactive-load compensation effect demo platform, the reactive-load compensation effect demo platform include accessing the idle of power grid by breaker
Load and the reactive compensation module that power grid is accessed by breaker, the one display mould of output end connection of the reactive compensation module
Block；
Harmonic wave control effect demo platform, the harmonic wave control effect demo platform include the harmonic wave that power grid is accessed by breaker
Source loads and is accessed by breaker the harmonic wave control module of power grid, the one display mould of output end connection of the harmonic wave control module
Block；
Three-phase imbalance compensation effect demo platform, the three-phase imbalance compensation effect demo platform includes being connect by breaker
Enter the three-phase imbalance load of power grid and accesses the three-phase imbalance abatement modules of power grid, the three-phase imbalance by breaker
The output end of abatement modules connects a display module.
2. power quality demo platform according to claim 1, which is characterized in that the reactive load by reactor and around
Line resistance, which carries, to be constituted.
3. power quality demo platform according to claim 1, which is characterized in that the harmonic source load is by wire resistor
It carries and constitutes with rectifier bridge device.
4. power quality demo platform according to claim 1, which is characterized in that the three-phase imbalance load is by coiling
Resistance builds composition.
5. power quality demo platform according to claim 1, which is characterized in that the display module include oscillograph and
The display screen being connected with the oscillograph.
6. power quality demo platform according to claim 5, which is characterized in that the oscillograph is clipped in by current clamp
On power grid.
7. a kind of operation method of power quality demo platform is demonstrated using the power quality of any one of claim 1 to 6
Platform carries out the demonstration before and after power quality controlling, which is characterized in that includes the following steps：
The first step：All breakers are in gate-dividing state；
Second step：Reactive-load compensation effect demo platform is run,
A) reactive load is accessed power grid by close circuit breaker, and the power factor of power grid is checked by oscillograph；
B) it recloses breaker and reactive compensation module is accessed into power grid, and run reactive compensation module, pass through oscillograph and display
Screen checks the power factor after compensation again；
C) breaker that reactive load is connected with reactive compensation module is in gate-dividing state；
Third walks：Harmonic wave control effect demo platform is run,
A) harmonic source is loaded access power grid by close circuit breaker, and the current waveform of a large amount of harmonic waves is contained by oscilloscope；
B) it recloses breaker and harmonic wave control module is accessed into power grid, run harmonic wave control module, pass through oscillograph and display screen
Check the current waveform after administering；
C) breaker that harmonic source load is connected with harmonic wave abatement modules is in gate-dividing state；
4th step：Three-phase imbalance compensation effect demo platform is run,
A) three-phase imbalance load is accessed power grid by close circuit breaker, and the electric current of each phase is observed by oscillograph and display screen；
B) it recloses breaker and three-phase imbalance abatement modules is accessed into power grid, and run three-phase imbalance abatement modules, pass through
Oscillograph and display screen check the effect after administering three-phase imbalance again；
C) breaker of three-phase imbalance load and three-phase imbalance abatement modules is finally in gate-dividing state.
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| CN201710091179.XA CN108461022A (en) | 2017-02-20 | 2017-02-20 | A kind of power quality demo platform and its operation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111193264A (en) * | 2019-11-08 | 2020-05-22 | 浙江晟泰电气有限公司 | Comprehensive control method for power quality control |
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| CN106229977A (en) * | 2016-09-14 | 2016-12-14 | 山东华天电气有限公司 | Circuit electric energy quality optimizing device based on WIFI communication, method and system |
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| CN111193264B (en) * | 2019-11-08 | 2021-10-08 | 浙江晟泰电气有限公司 | Comprehensive control method for power quality control |
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