CN203037823U - Wind power and photovoltaic grid-connected test device - Google Patents
Wind power and photovoltaic grid-connected test device Download PDFInfo
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- CN203037823U CN203037823U CN 201220729571 CN201220729571U CN203037823U CN 203037823 U CN203037823 U CN 203037823U CN 201220729571 CN201220729571 CN 201220729571 CN 201220729571 U CN201220729571 U CN 201220729571U CN 203037823 U CN203037823 U CN 203037823U
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Abstract
The utility model provides a wind power and photovoltaic grid-connected test device which comprises a power converter, a series transformer, a series transformer, an input circuit breaker, an output circuit breaker, a protection circuit breaker, first, second, third and fourth function switches, a bypass switch and a DSP control detection unit. The input end of the grid-connected test device is connected with a power grid, and the output end is connected with a wind turbine power generating set or a photovoltaic power generating station, wherein the wind turbine power generating set or the photovoltaic power generating station is taken as a device to be tested. According to the utility model, deviation voltage or harmonic voltage and power grid rated voltage or fundamental wave voltage are superimposed to reach a power grid adaptability test requirement, wherein the deviation voltage or the harmonic voltage is output by the power converter; the capacity of the power converter is less than the rated capacity of the device to be tested; and due to the reduction of the capacity of the converter, the system has the advantages of low cost, small volume, light weight, small heating value and high reliability.
Description
Technical field
The utility model belongs to the proving installation of grid-connected system in the new energy field, and a kind of proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic is provided especially, can satisfy the grid adaptability functional test of wind-powered electricity generation unit and photovoltaic plant.
Background technology
In recent years, the development of Chinese wind-force Generate, Generation, Generator volt power generating industry is rapid, and installed capacity increases year after year fast.For example, 2010, newly-increased 12904 of wind-powered electricity generation unit, installed capacity 18.93GW increases by 73.3% on a year-on-year basis, and the accumulative total installed capacity reaches 44.733GW, surpasses the U.S. and ranks first in the world, and has three tame wind-powered electricity generation device fabrication enterprises to enter world top ten.2011, Chinese photovoltaic product production capacity 30GW accounted for global production capacity 60%, the man world of number ten big photovoltaic enterprises was arranged all from China.At present, China national Bureau of Energy has announced " 12 " object of planning of Chinese regenerative resource development, and by 2015, the wind-electricity integration installed capacity will reach 100GW, produce energy 1,900 hundred million kilowatt hours per year; The photovoltaic generation installed capacity will reach 21GW, produce energy 25,000,000,000 kilowatt hours per year.
Meanwhile, a lot of problems have also appearred in China's wind-powered electricity generation and photovoltaic operation: extensive blower fan off-grid event has repeatedly taken place in China at present, as on February 24th, 2011, in electric Jiuquan wind-powered electricity generation company bridge west first wind energy turbine set cable fault appears, cause three-phase shortcircuit, cause 16 wind energy turbine set, 598 typhoon group of motors off-grids.April 17, Guazhou County, Gansu synergism wind-powered electricity generation company dry river mouth west second wind energy turbine set fault causes 702 unit off-grids of 15 wind energy turbine set, and on the same day, state Hua Jiaxin wind energy turbine set also has an accident in Zhangjiakou, Hebei, 644 typhoon group of motors off-grids, etc.Trace it to its cause, at first, it is one of the main reasons that blower fan does not possess that low-voltage passes through, and this has been the common recognition that industry forms.But blower fan is one of them major reason to the grid adaptability difference equally, and because the blower fan off-grid accident that the grid adaptability scarce capacity is caused also presents situation occurred frequently gradually.Aspect photovoltaic generation, because the solar energy power generating energy density is low, it is poor to stablize, regulating power is poor equally, generated energy is subjected to the influence of weather and region bigger, also can be to power grid security after generating electricity by way of merging two or more grid systems, stable, the power supply quality of economical operation and electrical network causes certain influence.For this reason, large-scale wind-power electricity generation or photovoltaic power generation grid-connecting move the sound development that the immense pressure of bringing to electricity net safety stable is restricting China's wind-powered electricity generation and photovoltaic industry.
In order to prevent, or even stop wind-powered electricity generation and the grid-connected safety and stability problem of bringing to electrical network, guarantee the safety of system's setter and the reliability service of electrical network, at present, China has taked measure and has formulated standard, associated " power grid adaptability of wind generator set test procedure " and " photo-voltaic power generation station inserts the power system technology regulation " linked network consult on, requirement is carried out grid adaptability to grid-connected system and (is comprised voltage adaptation, frequency adaptability, imbalance of three-phase voltage adaptability, flickering adaptability and harmonic voltage adaptability) aptitude tests, also to satisfy the technical requirement that the quality of power supply requires and is incorporated into the power networks simultaneously.The adaptability that just need test wind-powered electricity generation and photovoltaic parallel in system by special equipment simulating electric network fault situation for this reason.
For example, the patent documentation of application number 201120134815.0 discloses big capacity flexible grid-connected photovoltaic inverter detection platform, and this test platform comprises isolating transformer, and controllable direct current power supply is used to the input of inverter to be measured; The grid disturbance generating means; Many tap transformers; RLC load centralized control system; Wherein, inlet wire connects isolating transformer, and isolating transformer is output as the test bus, test bus branch by behind the isolating transformer as the input of controllable direct current power supply, transformer is surveyed in controllable direct current power supply output reception; Another branch disturbing generating device that gets access to grid after by the isolating transformer step-down, the output of grid disturbance generating means connects many tap transformers, and the interchange side of inverter is surveyed in the output reception of many tap transformers.
The patent documentation of application number 201010206913.0 discloses a kind of device for testing power grid adaptability of wind generator set, this device comprises the current transformer that makes up based on power semiconductor device, this current transformer input end connects three-phase supply, and output terminal connects wind power generating set.
The disclosed relevant grid adaptability proving installation of above-mentioned these patent documentations or be at the wind-powered electricity generation unit, or be at photovoltaic DC-to-AC converter, use single; And second patent adopts power converter to finish the total power test, and its volume is big, cost is high, also strengthens the manufacture difficulty of system, the dilatation of power-limiting current transformer.
The utility model content
The utility model is in view of described problem, a kind of proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic is provided, and this device can satisfy the power grid adaptability of wind generator set test request, can satisfy photo-voltaic power generation station grid adaptability test request again, it is simple in structure, has very strong practicality.Simultaneity factor provides rated voltage and fundamental voltage etc. as reference voltage by inserting electrical network, the deviation voltage △ U and the each harmonic voltage U n that utilize the power converter device to provide to satisfy test request.Therefore, the proving installation capacity that the utility model provides is far smaller than system's rated capacity, makes that its volume is little, cost is low, easy to manufacture.
The utility model is a kind of proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic; the described proving installation that is incorporated into the power networks comprises: power converter; series transformer; shunt transformer; the input isolating switch; the output isolating switch; protective breaker; first to fourth function change-over switch and by-pass switch and DSP(digital signal processing: control detecting unit Digital Signal Processing); the input end of proving installation of being incorporated into the power networks connects electrical network; output terminal connects wind power generating set or the photo-voltaic power generation station as device to be measured; the input end of input isolating switch is connected to electrical network; the output terminal of input isolating switch connects the former limit of series transformer winding one end; the input end that connects protective breaker simultaneously; the other end of the former limit of series transformer winding connects the input end of the second function change-over switch; the output terminal of the second function change-over switch connects the input end of output isolating switch; the output terminal of output isolating switch is connected to device to be measured; the output terminal of protective breaker connects the input end of power converter; the output terminal of power converter connects the input end of the first function change-over switch and the 3rd function change-over switch respectively; the output terminal of the first function change-over switch connects series transformer secondary winding; the output terminal of the 3rd function change-over switch connects the input end of shunt transformer; the output terminal of shunt transformer connects the input end of the 4th function change-over switch; the output terminal of the 4th function change-over switch is connected to the input end of output isolating switch, and by-pass switch is connected across the output terminal of input isolating switch and exports between the input end of isolating switch.
Wherein, described input isolating switch and output isolating switch are mainly used in the protection of grid side and device to be measured, and described protective breaker is the protection that is mainly used in the power converter side.
Be preferably, described power converter is the converter topologies with energy two-way flow.
Be preferably, in the utility model proving installation, first to fourth function change-over switch and by-pass switch are mechanical switch or electronic switch.Electronic switch is with the solid-state switch of semiconductor switch devices such as thyristor, GTO, IGBT, IGCT as on-off element.
Described series transformer is used for the deviation voltage of power converter output and harmonic voltage are arrived the former limit of transformer by the secondary winding coupled, and described shunt transformer is used for sending the power converter output frequency to device to be measured, realizes voltage matches simultaneously.
First to fourth function change-over switch is used for control test voltage adaptability, imbalance of three-phase voltage adaptability, flickering adaptability, harmonic wave adaptability or test frequency adaptability; The control actual electric network that is used for by-pass switch inserts or the simulation electrical network inserts.
Described DSP control detecting unit is used for control power converter switching device, input isolating switch, output isolating switch, protective breaker and first to fourth function change-over switch and by-pass switch; While detection power current transformer input voltage, electric current, phase place, the input voltage of the dc voltage of power converter, electric current and device to be measured, electric current, phase place.According to detected value control power converter switching device, output meets the voltage, frequency, harmonic wave of test request etc.
According to the proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic provided by the utility model, described device input end gets access to grid, device is surveyed in output terminal reception, device to be measured can be wind power generating set, it also can be photo-voltaic power generation station, this proving installation can be simulated the various characteristics of electrical network, comprises voltage, frequency, three-phase imbalance, voltage fluctuation and electrical network characteristics such as flickering, harmonic voltage, satisfies wind-powered electricity generation and grid-connected grid adaptability test request.
Test job principle of the present utility model
According to the proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic provided by the utility model, can satisfy wind-powered electricity generation unit and photovoltaic plant simultaneously and relate to gateway key index-grid adaptability functional test, wherein, for voltage adaptation, three-phase imbalance adaptability, the adaptive test of flickering adaptability and harmonic wave, provide rated voltage or fundamental voltage etc. as reference voltage by inserting electrical network, control power converter device provides deviation voltage △ U or the each harmonic voltage U n that satisfies test request, realize voltage adaptation by series transformer stack rated voltage and deviation voltage △ U, three-phase imbalance adaptability and flickering adaptive testing requirement, stack fundamental voltage and each harmonic voltage U n realize harmonic wave adaptive testing requirement; For the frequency adaptation property testing, by the output frequency of control power converter, thus and the test request of shunt transformer energy transmission realization frequency adaptability.
Proving installation described in the utility model had both comprised common three-phase system, also comprised the three-phase system of band ground wire or band center line or band ground wire and center line.
At present, grid adaptability test relevant criterion requires: require when voltage adaptation, frequency adaptability, imbalance of three-phase voltage adaptability, flickering adaptability, harmonic wave adaptive testing device average active power output to be measured respectively rated power 10%, 10%, 50%, 30%, more than 50%.
The utility model proving installation voltage adaptation, imbalance of three-phase voltage adaptability, flickering adaptability and harmonic wave adaptability all are to provide rated voltage or fundamental voltage by electrical network, power converter only provides deviation voltage or each harmonic voltage, as long as all capacity for power converter satisfy deviation voltage and each harmonic voltage needs capacity.
The utility model proving installation frequency adaptability is the total power that test request is provided by power converter fully, and all power converters must satisfy the power requirement of frequency adaptation property testing, i.e. rated power more than 10%.
Comprehensive above grid adaptability measuring technology scheme is as long as design power current transformer capacity satisfies in voltage adaptation, imbalance of three-phase voltage adaptability, flickering adaptability and the harmonic wave adaptive testing deviation voltage or the required capacity of each harmonic voltage and satisfies and reaches more than 10% of rated power in the frequency adaptation property testing in the utility model proving installation.Therefore, Capacity design for power converter can be far smaller than device rated capacity to be measured, be accompanied by the reduction of current transformer capacity, can bring a series of benefits thus, low such as cost, volume is little, in light weight, thermal value is little, reliability is high, this is for the Mobile Test Unit that is integrated in the container the inside, and the advantage of bringing is very huge.
For the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment, if grid adaptability dependence test standard has improved test rated power later on, especially the rated power that will reach during the frequency adaptation property testing, the utility model proving installation only need improve the rated power that the power converter design capacity reaches the frequency adaptability test request and get final product; Since in the technical solutions of the utility model for the adaptive testing beyond the frequency adaptability, power converter only provides deviation voltage and each harmonic, so still do not lose the less advantage of power converter capacity, the utility model proving installation is used for the wind-powered electricity generation unit of test or the restriction that photo-voltaic power generation station can not be subjected to capacity simultaneously, alleviate power converter dilatation difficulty greatly, enlarged its range of application.
The beneficial effects of the utility model are as follows:
1, the utility model can be simulated the various characteristics of electrical network for the proving installation that is incorporated into the power networks of wind-powered electricity generation and photovoltaic, comprise voltage, frequency, three-phase imbalance, voltage fluctuation and electrical network characteristics such as flickering, harmonic voltage, can satisfy wind-powered electricity generation and grid-connected grid adaptability test request.
2, the utility model is used for the proving installation that is incorporated into the power networks of wind-powered electricity generation and photovoltaic, reaches more than 10% of rated power in the frequency adaptation property testing as long as the Capacity design of its power converter satisfies in voltage adaptation, imbalance of three-phase voltage adaptability, flickering adaptability and the harmonic wave adaptive testing deviation voltage and the required capacity of each harmonic voltage and satisfies.So the Capacity design of power converter can be far smaller than device rated capacity to be measured, be accompanied by the reduction of current transformer capacity, can bring a series of benefits thus, low such as cost, volume is little, in light weight, thermal value is little, reliability is high, this is for the Mobile Test Unit that is integrated in the container the inside, and the advantage of bringing is very huge.
3, the proving installation that is incorporated into the power networks that is used for wind-powered electricity generation and photovoltaic for the utility model, if grid adaptability dependence test standard has improved test rated power later on, especially the rated power that will reach during the frequency adaptation property testing, the utility model proving installation only need improve the rated power that the power converter design capacity reaches the frequency adaptability test request and get final product; Since in the technical solutions of the utility model for the adaptive testing beyond the frequency adaptability, power converter only provides deviation voltage and each harmonic, so still do not lose the less advantage of power converter capacity, the utility model proving installation is used for the wind-powered electricity generation unit of test or the limit value that photo-voltaic power generation station can not be subjected to capacity simultaneously, alleviate power converter dilatation difficulty, enlarged its range of application.
Description of drawings
Fig. 1 is the structural drawing of the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment;
Fig. 2 is the formation block diagram that the DSP of the novel grid-connected proving installation of the described wind-powered electricity generation/photovoltaic of the utility model one embodiment controls detecting unit;
Fig. 3 is the wiring circuit diagram of the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment.
Embodiment
Below, by reference to the accompanying drawings, embodiment of the present utility model is further specified.
Be illustrated in figure 1 as the structural drawing of the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment, described proving installation comprises power converter, series transformer, shunt transformer, input circuit breaker Q
I, output circuit breaker Q
O, protective breaker Q
PAnd first to fourth function change-over switch S1, S2, S3, S4 and by-pass switch S
BPIts input end gets access to grid, and device is surveyed in output terminal reception, and device to be measured can be wind power generating set or photo-voltaic power generation station.This proving installation can be simulated the various characteristics of electrical network, comprises voltage, frequency, three-phase imbalance, voltage fluctuation and electrical network characteristics such as flickering, harmonic voltage, satisfies wind-powered electricity generation and grid-connected grid adaptability test request.
Power converter comprises all three-phases with energy two-way flow or single-phase high voltage or low pressure converter topologies, three-phase system of forming as three-phase four-quadrant current transformer, the many level current transformers of three-phase and by single-phase converter etc.Adopt any converter topologies to consider according to combined factors such as device electric pressure to be measured, installed capacities.
The former limit windings in series of series transformer is between electrical network and device to be measured, and the secondary winding is by the closed power converter output terminal that connects of the first function change-over switch S1.Series transformer is used for the deviation voltage of power converter output or each harmonic voltage are arrived former limit stack electrical network rated voltage through the secondary winding coupled, thereby change the operation of power networks parameter, simulation electrical network voltage deviation, imbalance of three-phase voltage, voltage fluctuation and flicker, harmonic voltage etc. are finished voltage adaptation in wind-powered electricity generation unit and the photo-voltaic power generation station grid adaptability, imbalance of three-phase voltage adaptability, flickering adaptability and harmonic voltage adaptive testing requirement.
The former limit of shunt transformer is connected on the power converter outgoing side by the 3rd function change-over switch S3, and secondary is connected on the output circuit breaker Q by the 4th function change-over switch S4
OInput side.Shunt transformer provides path and matching voltage grade for grid adaptability medium frequency adaptability.
By-pass switch S
BPBe used for the control actual electric network and insert or simulate electrical network access, closes bypass switch S
BP, device to be measured is powered by actual electric network, is generally used for waiting for test condition; When satisfying test condition, bypass switch opens S
BP, entering test process, device to be measured is by the simulation mains supply.
It is frequency adaptation property testing or other adaptive testings except frequency adapts to that first to fourth function change-over switch S1, S2, S3, S4 are used for control.The closed first function change-over switch S1 and the second function change-over switch S2, disconnect the 3rd function change-over switch S3 and the 4th function change-over switch S4, finish voltage adaptation, imbalance of three-phase voltage adaptability, flickering adaptability and harmonic voltage adaptive testing by series transformer coupled power current transformer output bias voltage or each harmonic voltage stack electrical network rated voltage or fundamental voltage; Closed the 3rd function change-over switch S3 and the 4th function change-over switch S4, disconnect the first function change-over switch S1 and the second function change-over switch S2, finish the frequency adaptation property testing separately by current transformer transmitted power current transformer output frequency in parallel and self matching voltage.
In the utility model proving installation, first to fourth function change-over switch S1, S2, S3, S4 and by-pass switch S
BPBe made of mechanical switch or electronic switch, electronic switch is with the solid-state switch of semiconductor switch devices such as thyristor, GTO, IGBT, IGCT as its on-off element.
Be illustrated in figure 2 as the formation block diagram of the DSP control detecting unit of the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment, control module is as the core of control system hardware circuit, adopt high speed digital signal processor DSP TMS320F28335, utilize its high speed processing ability, High-Accuracy PWM output to realize that system is quick, accurate, the high precision operation, and utilize the exploitation of processor floating point processing unit accelerated procedure, reduce cost of development.
DSP control detecting unit is used for control power converter switching device, input circuit breaker Q
I, output circuit breaker Q
O, protective breaker Q
PAnd first to fourth function change-over switch S1, S2, S3, S4 and by-pass switch S
BPSimultaneously detection power current transformer input voltage, electric current, phase place, power converter dc voltage, electric current, and device input voltage to be measured, electric current, phase place etc.According to detected value control power converter switching device, output meets the voltage, frequency, harmonic wave of test request etc.
The utility model is a kind of proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic, can satisfy wind-powered electricity generation unit and photovoltaic plant simultaneously and relate to gateway key index-grid adaptability functional test, wherein for voltage adaptation, three-phase imbalance adaptability and the adaptive test of flickering, provide rated voltage Ue as reference voltage by inserting electrical network, the deviation voltage △ U of test request is satisfied in the output of control power converter device, realizes voltage adaptation, three-phase imbalance adaptability and flickering adaptive testing requirement by series transformer stack rated voltage Ue and deviation voltage △ U.
The proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic described in the utility model, can satisfy wind-powered electricity generation unit and photovoltaic plant simultaneously and relate to gateway key index-grid adaptability functional test, wherein for the adaptive test of harmonic voltage, provide fundamental voltage U1 as reference voltage by inserting electrical network, the each harmonic voltage U n of test request is satisfied in the output of control power converter device, realizes harmonic wave adaptive testing requirement by series transformer stack fundamental voltage U1 and each harmonic voltage U n.
The utility model is a kind of proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic, can satisfy wind-powered electricity generation unit and photovoltaic plant simultaneously and relate to gateway key index---grid adaptability functional test, wherein for the frequency adaptation property testing, by control power converter output frequency, thus and shunt transformer energy transmission realization frequency adaptability test request.
Be illustrated in figure 3 as the wiring circuit diagram of the described proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic of the utility model one embodiment, show a kind of common three-phase three-wire system system.The utility model proving installation has also comprised the three-phase system of band ground wire or band center line or band ground wire and center line.
Followingly specify various grid adaptability test processs according to Fig. 3:
1, voltage adaptation:
According to the grid adaptability relevant criterion, during the voltage adaptation property testing, line voltage is regulated in 0.9p.u. ~ 1.4p.u, and the step-length of voltage adjustment is 1% of rated voltage.Voltage adaptation of the present utility model is to provide under the prerequisite of rated voltage at electrical network, and the deviation voltage △ U by stack power converter output reaches device input voltage to be measured and regulate the requirement of realization voltage adaptation property testing 0.9p.u. ~ 1.4p.u scope in.
The utility model voltage adaptation is implemented as follows:
Before the test, closed input circuit breaker Q
I, output circuit breaker Q
OWith by-pass switch S
BP, all the other all switches all are in off-state, and device to be measured is powered by actual electric network, waits to be tested.
After satisfying test condition, the closed first function change-over switch S1 and the second function change-over switch S2, bypass switch opens S
BP, device to be measured begins test by the simulation mains supply.Provide rated voltage U1 by the former limit of series transformer to device to be measured by electrical network, again by control power converter output bias voltage △ U, deviation voltage △ U is coupled to former limit through the series transformer secondary, electrical network rated voltage U1 stack series transformer coupling deviation voltage △ U, thereby reach the requirement of regulating device input terminal voltage to be measured (U1 ± △ U), afterwards, test according to the voltage adaptation property testing step of stipulating in the standard.Wherein Δ U=0 ~ ± 0.4p.u., the step-length of △ U is 1% of rated voltage.
After test is finished, closes bypass switch S
BP, disconnect the first function change-over switch S1 and the second function change-over switch S2.
2, imbalance of three-phase voltage adaptability:
According to the grid adaptability relevant criterion, it is that three-phase negative/positive Voltage unbalance degree is 2.0% and 4.0% that the imbalance of three-phase voltage adaptive testing requires.Imbalance of three-phase voltage adaptability of the present utility model also is to provide under the prerequisite of rated voltage at electrical network, and the deviation voltage △ U that exports by the stack power converter realizes imbalance of three-phase voltage adaptive testing requirement.
The concrete enforcement of the utility model imbalance of three-phase voltage adaptability is as follows:
Before the test, closed input circuit breaker Q
I, output circuit breaker Q
OWith by-pass switch S
BP, all the other all switches all are in off-state, and device to be measured is powered by actual electric network, waits to be tested.
After satisfying test condition, the closed first function change-over switch S1 and second function are switched S2, bypass switch opens S
BP, device to be measured begins test by the simulation mains supply.Provide rated voltage U1 by the former limit of series transformer to device to be measured by electrical network, again by controlling wherein phase or a two-phase output voltage deviation-△ U of power converter
A/-△ U
B/-△ U
COr-△ U
AWith-△ U
B/-△ U
BWith-△ U
C/-△ U
CWith-△ U
ADeviation voltage is coupled to former limit through the series transformer secondary, electrical network rated voltage U1 stack series transformer coupling deviation voltage value is met tri-phase unbalance factor and is 2.0% and 4.0% test request, tests according to the three-phase imbalance adaptive testing step of stipulating in the standard afterwards.
After test is finished, closes bypass switch S
BP, disconnect the first function change-over switch S1 and the second function change-over switch S2.
3, flickering adaptability:
According to the grid adaptability relevant criterion, the flickering adaptive testing requires the flickering value more than or equal to 1.Flickering adaptability of the present utility model also is to provide under the prerequisite of rated voltage at electrical network, and deviation voltage and the change voltage fluctuation frequency exported by the stack power converter realize flickering adaptive testing requirement.
The utility model flickering adaptability is implemented as follows:
Before the test, closed input circuit breaker Q
I, output circuit breaker Q
oWith by-pass switch S
BP, all the other all switches all are in off-state, and device to be measured is powered by actual electric network, waits to be tested.
After satisfying test condition, the closed first functional switch S1 and the second function change-over switch S2, bypass switch opens S
BP, device to be measured begins test by the simulation mains supply.Provide rated voltage U1 by the former limit of series transformer to device to be measured by electrical network, again by control power converter output voltage deviate ± △ U and voltage fluctuation frequency f, voltage deviation value ± △ U and voltage fluctuation frequency f are coupled to former limit through the series transformer secondary, electrical network rated voltage U1 stack series transformer coupled voltages deviate ± △ U and voltage fluctuation frequency f, satisfying device input terminal voltage to be measured (U1 ± △ U) is the test request that f changes with the vibration frequency, tests according to the flickering adaptive testing step of stipulating in the standard afterwards.
After test is finished, closes bypass switch S
BP, disconnect the first functional switch S1 and the second function change-over switch S2.
4, harmonic voltage adaptability:
According to the grid adaptability relevant criterion, the harmonic voltage adaptive testing require to arrange the total percent harmonic distortion of voltage and arrange each harmonic (2 ~ 25 times, but wherein 3 doubly for several times except) the voltage containing ratio is designated value.Harmonic voltage adaptability of the present utility model is to provide under the prerequisite of fundamental voltage at electrical network, satisfies the harmonic voltage adaptive testing requirement of total percent harmonic distortion or each harmonic containing ratio by stack power converter output each harmonic voltage.
The utility model harmonic voltage adaptability is implemented as follows:
Before the test, closes bypass switch S
BP, the input circuit breaker Q
IWith the output circuit breaker Q
o, all the other all switches all are in off-state, and device to be measured is powered by actual electric network, waits to be tested.
After satisfying test condition, the closed first functional switch S1 and the second function change-over switch S2, bypass switch opens S
BP, device to be measured begins test by the simulation mains supply.Provide fundamental voltage U1 by the former limit of series transformer to device to be measured by electrical network, again by control power converter output each harmonic voltage U n (n=2 ~ 25, but wherein except 3 the doubly several), each harmonic voltage U n is coupled to former limit through the series transformer secondary, electrical network fundamental voltage U1 stack series transformer coupling each harmonic voltage U n, make device input terminal voltage to be measured satisfy total percent harmonic distortion or each harmonic containing ratio, test according to the harmonic voltage adaptive testing step of stipulating in the standard afterwards.
After test is finished, closes bypass switch S
BP, disconnect the first functional switch S1 and the second function change-over switch S2.
5, frequency adaptability
According to the grid adaptability relevant criterion, during the frequency adaptation property testing, mains frequency allows the low-limit frequency of operation to regulate to the 50.5Hz scope at unit, and the step-length of frequency adjustment is 0.1Hz.Frequency adaptability of the present utility model is to pass through control power converter output unit fully to allow the low-limit frequency of operation to the frequency realization frequency adaptability test request of 50.5Hz.
The utility model frequency adaptability is implemented as follows:
Before the test, closes bypass switch S
BP, the input circuit breaker Q
IWith the output circuit breaker Q
o, all the other all switches all are in off-state, and device to be measured is powered by actual electric network, waits to be tested
After satisfying test condition, closed the 3rd function change-over switch S3 and the 4th function change-over switch S4, bypass switch opens S
BP, device to be measured begins test by the simulation mains supply.The frequency adaptation property testing is to be realized by power converter fully, change in requiring the test frequency scope by control power converter output frequency, obtain frequency and the matching voltage of test request again through shunt transformer, test according to the frequency adaptability testing procedure of stipulating in the standard afterwards.
After test is finished, closes bypass switch S
BP, disconnect the 3rd function change-over switch S3 and the 4th function change-over switch S4.
The utility model is not limited to above-mentioned embodiment, and under the situation that does not deviate from flesh and blood of the present utility model, any distortion that those skilled in the art can expect, improvement, replacement all fall into scope of the present utility model.
Claims (4)
1. proving installation that is incorporated into the power networks that is used for wind-powered electricity generation and photovoltaic; it is characterized in that; the described proving installation that is incorporated into the power networks comprises: power converter; series transformer; shunt transformer; the input isolating switch; the output isolating switch; protective breaker; first to fourth function change-over switch and by-pass switch and DSP control detecting unit; the input end of the described proving installation that is incorporated into the power networks connects electrical network; output terminal connects wind power generating set or the photo-voltaic power generation station as device to be measured; the input end of described input isolating switch is connected to electrical network; the output terminal of described input isolating switch connects the former limit of series transformer winding one end; and connect the input end of described protective breaker; the other end of the former limit of described series transformer winding connects the input end of the second function change-over switch; the output terminal of the described second function change-over switch connects the input end of output isolating switch; the output terminal of described output isolating switch is connected to device to be measured; the output terminal of described protective breaker connects the input end of power converter; the output terminal of described power converter connects the input end of the described first function change-over switch and the 3rd function change-over switch respectively; the output terminal of the described first function change-over switch connects the secondary winding of described series transformer; the output terminal of described the 3rd function change-over switch connects the input end of described shunt transformer; the output terminal of described shunt transformer connects the input end of the 4th function change-over switch; the output terminal of described the 4th function change-over switch is connected to the input end of described output isolating switch, and described by-pass switch is connected across the output terminal of input isolating switch and exports between the input end of isolating switch.
2. the proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic according to claim 1 is characterized in that, described power converter is the converter topologies with energy two-way flow.
3. the proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic according to claim 1 is characterized in that, described first to fourth function change-over switch and by-pass switch are mechanical switch or electronic switch.
4. the proving installation that is incorporated into the power networks for wind-powered electricity generation and photovoltaic according to claim 1, it is characterized in that, described series transformer arrives the former limit of transformer with deviation voltage and the harmonic voltage of described power converter output by the secondary winding coupled, described shunt transformer sends the power converter output frequency to device to be measured, simultaneously the matching voltage grade.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729571 CN203037823U (en) | 2012-12-26 | 2012-12-26 | Wind power and photovoltaic grid-connected test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729571 CN203037823U (en) | 2012-12-26 | 2012-12-26 | Wind power and photovoltaic grid-connected test device |
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| CN203037823U true CN203037823U (en) | 2013-07-03 |
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| CN 201220729571 Withdrawn - After Issue CN203037823U (en) | 2012-12-26 | 2012-12-26 | Wind power and photovoltaic grid-connected test device |
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| CN (1) | CN203037823U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064023A (en) * | 2012-12-26 | 2013-04-24 | 北京荣华恒信开关技术有限公司 | Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof |
| CN107782999A (en) * | 2014-06-11 | 2018-03-09 | 钱珺佳 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
-
2012
- 2012-12-26 CN CN 201220729571 patent/CN203037823U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064023A (en) * | 2012-12-26 | 2013-04-24 | 北京荣华恒信开关技术有限公司 | Grid-tied testing device for wind electricity and photovoltaic energy and testing method thereof |
| CN103064023B (en) * | 2012-12-26 | 2015-10-14 | 北京荣华恒信开关技术有限公司 | For grid-connected proving installation and the method for testing thereof of wind-powered electricity generation and photovoltaic |
| CN107782999A (en) * | 2014-06-11 | 2018-03-09 | 钱珺佳 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN107991563A (en) * | 2014-06-11 | 2018-05-04 | 陈国栋 | Power supply and distribution, the wind light mutual complementing nature imitation experiment device of grid-connected experiment and method of work |
| CN108008219A (en) * | 2014-06-11 | 2018-05-08 | 钱珺佳 | Wind light mutual complementing nature imitation experiment device |
| CN108037386A (en) * | 2014-06-11 | 2018-05-15 | 陈国栋 | For power supply and distribution, the wind light mutual complementing nature imitation experiment device of grid-connected experiment |
| CN108037386B (en) * | 2014-06-11 | 2020-11-06 | 广东广能电力设计院有限公司 | Wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiment |
| CN107991563B (en) * | 2014-06-11 | 2021-01-15 | 国网浙江省电力有限公司绍兴供电公司 | Wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiment and working method |
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