CN106291363A - The new forms of energy grid-connected test device of integration - Google Patents
The new forms of energy grid-connected test device of integration Download PDFInfo
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- CN106291363A CN106291363A CN201610852811.3A CN201610852811A CN106291363A CN 106291363 A CN106291363 A CN 106291363A CN 201610852811 A CN201610852811 A CN 201610852811A CN 106291363 A CN106291363 A CN 106291363A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The present invention relates to the new forms of energy grid-connected test device of integration, including input chopper, input tranformer, two way convertor, voltage regulator, output transformator, output chopper, by-pass switch, external electrical network, test system.New forms of energy of the present invention integration grid-connected test device superior effect be: a set of test device can meet wind-powered electricity generation simultaneously, high-low voltage is passed through test by all devices that generates electricity by way of merging two or more grid systems of photovoltaic, grid adaptability test and the requirement of electric energy quality test, have highly integrated, volume is little, the advantage of low cost；Simple to operate, time saving and energy saving, improve testing efficiency, applied range.
Description
Technical field
The present invention relates to new energy field, be specifically related to the grid-connected detection technique of photovoltaic plant and Wind turbines, particularly
The new forms of energy grid-connected test device of integration.
Background technology
In recent years, China Wind Power Generate, Generation, Generator volt power generating industry quickly grows, and installed capacity the most quickly increases.Such as,
2010, Wind turbines increased 12904 newly, installed capacity 18.93GW, increased by 73.3% on a year-on-year basis, and accumulative installed capacity reaches
44.733GW, exceedes the U.S. and ranks first in the world, and has three wind power equipment manufacturing enterprises to enter top ten of the world.2011, China
Photovoltaic products production capacity 30GW, accounts for whole world production capacity 60%, and big photovoltaic enterprise of the You Shuojia world ten both is from China.At present, state of China
Bureau of Energy of family discloses " 12 " object of planning of China's Renewable Energy Development, by 2015, wind-electricity integration installed capacity
It is up to 100GW, produces energy 190,000,000,000 kilowatt hour per year；Photovoltaic generation installed capacity is up to 21GW, produces energy 25,000,000,000 kilowatts per year
Time.
While developing rapidly along with Wind Power In China and photovoltaic industry, problem is also again and again to occur, China is existing at present
Multiple wind energy turbine set repeatedly there occurs extensive blower fan off-grid event, runs to power system safety and stability and brings grave danger.With
Energy density is low, it is poor to stablize owing to solar energy power generating belongs to for sample, and the energy of regulating power difference, generated energy is by weather and region
Impact relatively big, can be stable to power grid security after generating electricity by way of merging two or more grid systems, the power supply quality of economical operation and electrical network causes one fixing
Ring.Returning its reason, generating equipment, in addition to not possessing high-low voltage ride-through capability, is also that it is heavy to grid adaptability ability
Want reason.Therefore, grid-connection device is only provided simultaneously with low voltage crossing, high voltage crossing and grid adaptability ability, ability
With bulk power grid harmonious coexistence, large-scale wind power, grid-connected problem could be solved the most technically.
At present, China has paid attention to this problem, in succession promulgates in 2011 for photovoltaic industry State Grid Corporation of China
" photovoltaic plant accesses electrical network test rule to Q/GDW617-2011 " photovoltaic plant accesses electric power network technique regulation " and Q/GDW618-2011
Journey " two company standards, country has also promulgated that " photo-voltaic power generation station accesses power system technology to GB GB/T19964-2012 simultaneously
Regulation ", specify that photovoltaic plant carries out low voltage crossing test, voltage adaptation and the requirement of frequency adaptability test；For
Wind-powered electricity generation industry country has also promulgated GB GB/T19963-2011 " wind energy turbine set accesses power system technology regulation ", simultaneously can source row
Industry standard " power grid adaptability of wind generator set test procedure " linked network the most consults on, it is desirable to grid-connected system is carried out low electricity
Pressure ride-through capability, grid adaptability (include that voltage adaptation, frequency adaptability, imbalance of three-phase voltage adaptability, flickering adapt to
Property and harmonic voltage adaptability) aptitude tests, be also satisfied the quality of power supply simultaneously and require and grid-connected technology requirement.Just need for this
To carry out the practical situation of simulating grid by special equipment and to test grid-connected system.
Such as, the patent documentation of application number 201210177538.0 discloses a kind of portable wind turbine generator system high-low voltage and wears
More testing device, can be simultaneously suitable for high-pressure system and low-pressure system test, described test device is connected on Wind turbines and electricity
Between net, mainly include inputting chopper, voltage regulation unit, bypass breaker and output chopper, use transformer secondary
Multi-tap pressure regulation form, IGCT high speed switching control and vehicle-mounted container structure, change by controlling IGCT break-make
Transformer output voltage, it is achieved the simulation test to tested Wind turbines difference electric pressure fault.This invention can be the completeest
Becoming high-low voltage to pass through testing experiment, device integrated level is high, and reliability is high, and economic and technical norms are the highest；Can be applicable to various
Type fan test, meets China and European and American countries high-low voltage passes through test standard, applied widely；Use vehicle-mounted packaging
Box structure, modularized design, convenient transportation, test is flexibly.
The patent documentation of application number 201010206913.0 discloses a kind of power grid adaptability of wind generator set test dress
Putting, including the current transformer built based on power semiconductor switch, this current transformer input connects three phase mains, outfan even
Connect wind power generating set.The device for testing power grid adaptability of wind generator set of this invention uses based on power semiconductor switch device
The current transformer that part builds, power density is big, and volume is little, low cost, and can bear wind-power electricity generation during electric network fault experiment
Most of dynamic impulsion that unit causes, thus alleviate the experimental system requirement to net capacity；It is capable of voltage, frequency
Step-less adjustment, thus all kinds of electric network fault can be simulated easily and flexibly, extend test scope, abundant test data, reduction experiment
Cycle；In the various original states of electric network fault test front simulation line voltage, thus complete test wind-force can also be realized and sends out
Data when group of motors breaks down under the various state of electrical network.
Test device disclosed in above-mentioned patent one document simply passes through test individually for wind turbine generator system high-low voltage, and
Test device disclosed in patent two document is also simply tested individually for Wind turbines grid adaptability, also has disclosed in other
Grid-connected test device patent is both for testing in a certain respect entirely, and high-low voltage is not only passed through test and grid adaptability
Test is separated into two covering devices, and also does for application (wind-power electricity generation, photovoltaic plant or other devices that generates electricity by way of merging two or more grid systems)
Distinguishing, its application is single, such as, existing wind-powered electricity generation is had again to the user of photovoltaic, it is necessary to buy four covering devices and just can complete
All of test, its cost of investment is high, floor space is big, causes the waste of resource simultaneously.
Summary of the invention
It is an object of the invention to propose the new forms of energy grid-connected test device of integration, described test device uses intensive setting
Meter, can complete high-low voltage simultaneously and pass through test, and include voltage, frequency, imbalance of three-phase voltage, voltage pulsation and sudden strain of a muscle
Become, the grid adaptability of harmonic voltage is tested, functional diversities, and described test device can meet wind-powered electricity generation simultaneously, photovoltaic owns
High-low voltage is passed through test, grid adaptability test and the requirement of electric energy quality test by the device that generates electricity by way of merging two or more grid systems.
The new forms of energy of the present invention grid-connected test device of integration, including input chopper, input tranformer, Bidirectional variable-flow
Device, voltage regulator, output transformator, output chopper, by-pass switch, external electrical network, test system, described input chopper
Connecting input tranformer, described input tranformer connects two way convertor and voltage regulator side by side, at described two way convertor
Connecting output transformator with the outfan of voltage regulator, described output transformator is connected, in described output with output chopper
Being provided with by-pass switch between chopper and input chopper, described input chopper connects external electrical network, described output chopper
It is connected with test system.
Being preferably, described voltage regulator is transformer type actuator.
Being preferably, described test system is wind power generating set, photo-voltaic power generation station or other devices that generates electricity by way of merging two or more grid systems.
Being preferably, described input tranformer is multi-tap input tranformer.
Being preferably, described output transformator is that multi-tap exports transformator.
The various characteristics of the described new forms of energy grid-connected test device energy simulating grid of integration, test including high voltage crossing,
Low voltage crossing test and voltage deviation, frequency departure, imbalance of three-phase voltage, voltage fluctuation and flicker, harmonic voltage
Grid adaptability is tested, and meets the test request of all devices that generates electricity by way of merging two or more grid systems simultaneously.
The described new forms of energy grid-connected test device of integration shares input chopper, output open circuit to all of test system
Device, by-pass switch, input tranformer and output transformator.
Realize grid adaptability by described two way convertor to test, it may be assumed that regulate the output voltage of described two way convertor
Realize voltage adaptation test；The output frequency regulating described two way convertor realizes frequency adaptability test；By changing institute
State two way convertor and export a phase or biphase voltage magnitude or phase place, or directly export negative sequence voltage, produce three-phase imbalance
Voltage, it is achieved imbalance of three-phase voltage adaptability；Regulate output voltage fluctuation amplitude and the voltage pulsation of described two way convertor
Frequency realizes flickering adaptability；The output frequency and the voltage magnitude that regulate described two way convertor realize harmonic voltage adaptability.
Realizing high-low voltage by described voltage regulator and pass through test, described voltage regulator uses transformer type to adjust
Joint device, i.e. transformer secondary use multi-tap design to draw, and draw tap voltage scope and include below rated voltage, rated voltage
And more than rated voltage, and each extraction tap of transformer secondary is connected one group of antiparallel thyristor controlled series compensation.By control
The break-make of thyristor controlled series compensation processed changes transformer output voltage, it is achieved voltage-regulation completes high-low voltage and passes through test.
Described by-pass switch is used for controlling actual electric network and accesses and simulating grid access, when Guan Bi by-pass switch, dress to be measured
Put and powered by external electrical network；Disconnecting by-pass switch, test system is powered by the described new forms of energy grid-connected test device of integration.
Described input tranformer and output transformator use multi-tap mode to design, and are used for controlling described external electrical network and treating
Surveying the coupling between device voltage, described input tranformer is connected to the input side of two way convertor and voltage regulator, will outward
Portion's line voltage is converted into the voltage mated with two way convertor and voltage regulator；Output transformator is connected to two way convertor
With the outlet side of voltage regulator, the output voltage of two way convertor and voltage regulator is converted into and mates with test system
Voltage.
Compared with prior art, the superior effect of the grid-connected test device of new forms of energy of the present invention integration is:
1., for traditional grid-connected test device, high-low voltage to be completed passes through test and grid adaptability is tested,
Typically requiring two equipment to be implemented separately, the most existing traditional grid-connected test device is single in application, such as same test
Function needs also exist for two complete equipments at wind-powered electricity generation and photovoltaic and is implemented separately, and new forms of energy of the present invention integration grid-connected test dress
Putting, use Intensive Design, a set of test device meets high-low voltage simultaneously and passes through test, grid adaptability test and electric energy
Quality test requirement, have highly integrated, volume is little, the advantage of low cost；Meanwhile, intensive design so that for be measured
For device, input side has only to primary connection, just completes two kinds of tests, simple to operate, time saving and energy saving, improves test effect
Rate.
The new forms of energy the most of the present invention grid-connected test device of integration, carries out electricity by input tranformer and output transformator simultaneously
Pressure coupling, it is possible to realize the test of multiple voltage grade, applied range, cost-effective.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the new forms of energy of the present invention grid-connected test device fundamental diagrams of integration；
Fig. 2 is the new forms of energy of the present invention grid-connected test device voltage modulator circuit schematic diagrams of integration；
Fig. 3 is new forms of energy of the present invention grid-connected test device embodiment 2 fundamental diagrams of integration；
Fig. 4 is new forms of energy of the present invention grid-connected test device embodiment 3 fundamental diagrams of integration；
Fig. 5 is the new forms of energy of the present invention grid-connected test device embodiment 4 operation principle block diagrams of integration；
Fig. 6 is the new forms of energy of the present invention grid-connected test device embodiment 4 grid adaptability test philosophy block diagrams of integration；
Fig. 7 is that grid-connected test device embodiment 4 high-low voltage of new forms of energy of the present invention integration passes through test philosophy block diagram.
Detailed description of the invention
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
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
It is illustrated in figure 1 the new forms of energy of the present invention grid-connected test device fundamental diagram of integration, the integration of described new forms of energy
Grid-connected test device, including input chopper 1, input tranformer 2, two way convertor 3, voltage regulator 4, output transformator 5,
Output chopper 6, by-pass switch 7, described input chopper 1 connects input tranformer 2, and described input tranformer 2 connects side by side
Two way convertor 3 and voltage regulator 4, the outfan at described two way convertor 3 and voltage regulator 4 connects output transformator
5, described output transformator 5 is connected with output chopper 6, is provided with bypass between described output chopper 6 and input chopper 1
Switch 7, described input chopper 1 connects external electrical network 8, and described output chopper 5 is connected with test system 9.Described voltage is adjusted
Joint device 4 is transformer type actuator, and described test system 9 is wind power generating set, photo-voltaic power generation station or other dresses that generates electricity by way of merging two or more grid systems
Putting, described input tranformer 2 is multi-tap input tranformer, and described output transformator 5 is that multi-tap exports transformator.
The described new forms of energy grid-connected test device of integration utilizes common input chopper 1, input tranformer 2, output to become
Depressor 5, output chopper 6 and by-pass switch 7 complete high voltage crossing test, voltage deviation is tested and included to low voltage crossing,
Frequency departure, imbalance of three-phase voltage, voltage fluctuation and flicker, the grid adaptability test of harmonic voltage, and meet simultaneously
Wind power generating set and the grid-connected test request of photo-voltaic power generation station.
Described by-pass switch 7 is used for controlling actual electric network and accesses or simulating grid access, closes by-pass switch 7, to be measured
Device 9 is powered by actual external electrical network 8；Disconnecting by-pass switch 7, enter test process, test system 9 is by described grid-connected test dress
Put power supply.
1, high-low voltage passes through test
High-low voltage passes through test and is realized by voltage regulator 4, first has to Guan Bi input chopper 1, output chopper 6,
Test ingredient is external electrical network 8, input tranformer 2, voltage regulator 4, output transformator 5 and test system 9.
Being illustrated in figure 2 the new forms of energy of the present invention grid-connected test device voltage modulator circuit schematic diagram of integration, voltage is adjusted
Joint device 4 uses transformer type voltage regulator, is made up of multi-tap transformator 41 and thyristor controlled series compensation 42, transformer secondary tap
Being designed as minimum voltage is 0, and (Un is rated voltage, and x is the percent higher than rated voltage, and wherein x can basis to be up to Un+x
Need flexible design), i.e. at test point, voltage is capable of between 0-Un+x with 5% or 10% change.Transformer secondary
Each tap correspondence one thyristor controlled series compensation of series connection, corresponds to TS0 TSUn+x with 0-Un+x.Come by controlling IGCT break-make
Change the transformer secondary tap of access system, it is achieved the simulation test to tested device difference electric pressure fault, simultaneously
Meet low voltage crossing testing experiment and high voltage crossing testing experiment.
2, grid adaptability test
Grid adaptability test is realized by two way convertor 3, first has to Guan Bi input chopper 1, output chopper 6, surveys
Examination ingredient is external electrical network 8, input tranformer 2, two way convertor 3, output transformator 5 and test system 9.
Voltage adaptation testing experiment is carried out by the output voltage amplitude of regulation two way convertor 3；Regulation output frequency
Carry out frequency adaptability testing experiment；Wherein, voltage-regulation step-length is the 1% of rated voltage, and frequency regulation step-length is 0.01Hz.
Export a phase or biphase voltage magnitude or phase place by changing two way convertor 3, or directly export negative sequence voltage,
Produce three-phase imbalance voltage, it is achieved imbalance of three-phase voltage adaptive testing is tested；Regulation output voltage fluctuation amplitude and electricity
Pressure fluctuation frequency carries out flickering adaptive testing test；Regulation output frequency and voltage magnitude realize harmonic voltage adaptive testing
Test.
Embodiment 2
As it is shown on figure 3, on the basis of embodiment 1, by realize high-low voltage pass through the multi-tap transformator 41 of test with
Input tranformer 1 is merged into the former secondary of a transformator, i.e. transformator and is designed to multi-tap extraction, and two way convertor 3 is even
Receive transformer secondary specified shelves tap, the most both provided cost savings, and reduced again volume.
When high-low voltage passes through test, do not start two way convertor 3, by controlling IGCT in each tap of transformator
Break-make change the transformer secondary tap of access system, it is achieved the simulation of electric pressure faults different to test system 9
Test；
During grid adaptability test, disconnect all of thyristor controlled series compensation 42, start two way convertor 3, two-way by controlling
The output voltage of current transformer 3 and frequency realize grid adaptability test.
Embodiment 3
As shown in Figure 4, on the basis of embodiment 2, increase by one group of anti-parallel thyristor valve group 43, be connected on described two-way
After current transformer 3.When doing high-low voltage and passing through test, for the restriction of compensator transformer output voltage, pass through thyristor valve
Group 43 is switched to two way convertor 3, it is achieved the step-less adjustment of test voltage.
Embodiment 4
As shown in Fig. 5～7, the described new forms of energy grid-connected test device of integration uses modularized design and vehicle-mounted container knot
Structure, by input equipment 10, output device 20, grid adaptability device 30, high and low pressure traversing device 40 and control, detection device
50 compositions.
For the scheme of embodiment 1, input equipment 10 includes inputting chopper 1, input tranformer 2 and by-pass switch 7；
Output device 20 includes exporting chopper 6 and output transformator 5；Grid adaptability device 30 includes two way convertor 3；High and low
Voltage ride-through device 40 includes voltage regulator 4；Control, detection device 50 includes host computer and main control unit；Wherein, bypass is opened
Close 7 to be arranged in input equipment 10, also can be arranged in output device 20.
Test site, carries out grid adaptability successively by device 10,20,30,40,50 assembling and high-low voltage passes through survey
Examination, when needing to test for different test system 9, increases a set of input equipment 10, a set of output device 20 and a set of control simultaneously
Making detection device 50, grid adaptability device 30 and high-low voltage traversing device 40 are separated, combination is flexible, it is simple, square to dismount
Just, testing efficiency is improved.Owing to input tranformer 2, output transformator 5 use multi-tap to design, described new forms of energy integration is also
Net test device uses same set of input equipment 10, output device 20 not only to carry out the different test system 9 of same electric pressure
Test simultaneously, the different test system 9 of different electric pressures are tested simultaneously.
For the scheme of embodiment 2, input equipment 10 includes inputting chopper 1, transformator and by-pass switch 7；Output dress
Put 20 to include exporting chopper 6 and output transformator 5；Grid adaptability device 30 includes two way convertor 3；High-low voltage is worn
More device 40 includes thyristor controlled series compensation 42；Control, detection device 50 includes host computer and main control unit；Equally, by-pass switch 7 was both
Can be arranged in input equipment 10, also can be arranged in output device 20.
For the scheme of embodiment 3, input equipment 10 includes inputting chopper 1, transformator and by-pass switch 7；Output dress
Put 20 to include exporting chopper 6 and output transformator 5；Grid adaptability device 30 includes two way convertor 3 and thyristor controlled series compensation
43；High-low voltage traversing device 40 includes thyristor controlled series compensation 42；Control, detection device 50 includes host computer and main control unit；With
Sample, by-pass switch 7 can be arranged in input equipment 10, moreover it is possible to arranges in output device 20.
Described host computer is computation terminal, and described main control unit is digital control chip.
The new forms of energy of the present invention grid-connected test device of integration determines input chopper 1, output according to practical situation
Chopper 6 and the type of test system 9.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (6)
1. new forms of energy integration grid-connected test device, including input chopper (1), input tranformer (2), two way convertor (3),
Voltage regulator (4), output transformator (5), output chopper (6), by-pass switch (7), external power source (8), test system
(9), it is characterised in that described input chopper (1) connects input tranformer (2), described input tranformer (2) connects double side by side
To current transformer (3) and voltage regulator (4), the outfan at described two way convertor (3) and voltage regulator (4) connects output
Transformator (5), described output transformator (5) is connected with output chopper (6), in described output chopper (6) and input open circuit
Being provided with by-pass switch (7) between device (1), described input chopper (1) connects external electrical network (8), described output chopper (5) with
Test system (9) is connected.
The new forms of energy the most according to claim 1 grid-connected test device of integration, it is characterised in that described voltage regulator
(4) it is transformer type actuator.
The new forms of energy the most according to claim 1 grid-connected test device of integration, it is characterised in that described test system (9)
It it is wind power generating set.
The new forms of energy the most according to claim 1 grid-connected test device of integration, it is characterised in that described test system (9)
It it is photo-voltaic power generation station.
The new forms of energy the most according to claim 1 grid-connected test device of integration, it is characterised in that described input tranformer
(2) it is multi-tap input tranformer.
The new forms of energy the most according to claim 1 grid-connected test device of integration, it is characterised in that described output transformator
(5) it is that multi-tap exports transformator.
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| CN107994865A (en) * | 2017-11-30 | 2018-05-04 | 深圳市华力特电气有限公司 | A kind of dynamic reactive test device |
| CN109061473A (en) * | 2018-09-26 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of Wind turbines master control system grid adaptability filed detection system and method |
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Application publication date: 20170104 |