CN107991563B - Wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiment and working method - Google Patents
Wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiment and working method Download PDFInfo
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Abstract
The invention relates to a wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiments and a working method, wherein the wind-solar complementary simulation experiment device comprises the following steps: the system comprises a photovoltaic power generation experimental unit, a wind power generation experimental unit and an off-grid inversion module connected with a storage battery; the photovoltaic power generation experimental unit comprises: the photovoltaic grid-connected inverter module, the direct current switch module and the photovoltaic module; the wind power generation experiment unit comprises: the system comprises a wind driven generator module, a main transformer module and a filtering compensation device module; the modules are connected through plug-in test wires respectively; the photovoltaic and wind energy grid-connected experiment is completed through the contained photovoltaic power generation experiment unit and the wind power generation experiment unit.
Description
Technical Field
The invention relates to a power supply and distribution experimental system, in particular to a working method of a wind-solar hybrid simulation experimental device for power supply and distribution and grid-connected experiments, which is used for establishing a working method of a power supply and distribution experimental system with certain capacity and represented by new energy.
Background
There are two types of electricity generation using solar energy: one is solar power generation (also referred to as solar photovoltaic power generation), and the other is solar thermal power generation (also referred to as solar thermal power generation). The solar photovoltaic power generation has high utilization rate, is economical and practical, and is widely popularized and used. Solar photovoltaic power generation is a power generation method for directly converting solar energy into electric energy. The photovoltaic power generation system comprises four forms of photovoltaic power generation, photochemical power generation, photoinduction power generation and photobiological power generation, wherein the technology is relatively mature at the present stage, and solar photovoltaic power generation is mostly utilized. The principle of wind power generation is that wind power drives windmill blades to rotate, and then the rotating speed is increased through a speed increaser, so that a generator is promoted to generate electricity. The essence of the method is to convert the kinetic energy of wind into mechanical kinetic energy and then convert the mechanical kinetic energy into electric energy.
However, despite the many advantages of wind energy, solar energy, we still cannot ignore their own disadvantages. They are not only energy sources with low energy density, but also energy sources with poor energy stability, which change with the change of weather and climate. These drawbacks bring difficulties to their popularization and application. Therefore, in order to establish a more stable, reliable, economic and reasonable energy system, the complementarity of wind energy and solar energy in various aspects needs to be fully utilized, and the wind energy and the solar energy are comprehensively utilized.
Disclosure of Invention
The invention aims to provide a working method of a wind-solar hybrid simulation experiment device, which meets the requirements of a solar and wind grid-connected experiment.
In order to solve the above technical problem, the present invention provides a working method of a wind-solar hybrid simulation experiment apparatus, wherein the wind-solar hybrid simulation experiment apparatus comprises: the system comprises a photovoltaic power generation experimental unit, a wind power generation experimental unit and an off-grid inversion module connected with a storage battery; the photovoltaic power generation experimental unit comprises: the photovoltaic grid-connected inverter module, the direct current switch module and the photovoltaic module; the wind power generation experiment unit comprises: the system comprises a wind driven generator module, a main transformer module and a filtering compensation device module; the working method comprises the following steps: during the experiment, each wire is respectively inserted into the input and output holes near each module so as to connect the input end and the output end of the corresponding module.
Further, the wind-solar hybrid simulation experiment device further comprises: the capacitance testing unit is used for carrying out capacitance online detection experiments, and the working method of the capacitance testing unit comprises the following steps:
the method comprises the following steps: collecting voltage vectors at two ends of the capacitor to be measured, and decomposing the voltage vectors into fundamental wave voltage
Andnsub-harmonic voltage component
I.e. the superimposed voltage across the capacitor under test
I.e. by
Calculating the effective value of the superimposed voltageUEffective value of fundamental voltageU 0。
Step two: establishing a capacitance sound pressure level database, wherein the database comprises: each type of capacitor has a capacitor sound pressure level corresponding to the effective value of the fundamental voltage.
Presetting the type and rated capacitance of the capacitor to be measuredC 0According to the type of the measured capacitor and the current effective value of the fundamental voltageU 0Obtaining a corresponding capacitance sound pressure level from the database of capacitance sound pressure levels
。
Collecting sound signals generated by the tested capacitor to obtain the corresponding capacitor sound pressure level
By the formula
Calculating the actual capacitance of the measured capacitorC x 。
Step three: according to the actual capacitance of the measured capacitorC x And effective value of the superimposed voltageUEstablishing a capacitance estimation equation, i.e.
(ii) a Wherein the content of the first and second substances,Cthe ultimate capacitance value when the tested capacitor is damaged,tin order to allow the capacitor to be damaged for the expected time,kis the effective value U of the measured capacitance at the current fundamental voltage in unit time0The lower corresponding coefficient of change in capacitance, i.e.,
wherein, in the step (A),C x1andC x2the initial value and the final value of the capacitance of the measured capacitor in unit time are shown.
Setting the limit capacitance valueCDeriving a calculation formula of the expected time t of the capacitor damage from the capacitance estimation formula, i.e.
So as to calculate the expected time of the tested capacitor being damaged.
Further, the effective value U of the superposed voltage passes through the fundamental voltage
And nth harmonic voltage component
The square root value of the sum of the squares of the effective values of (a) is obtained.
Further, the nth harmonic voltage component
Wherein n is 5.
Compared with the prior art, the technical scheme of the invention has the following advantages: (1) the photovoltaic and wind energy grid-connected experiment is completed through the contained photovoltaic power generation experiment unit and the wind power generation experiment unit; (2) the invention combines the ultrasonic sensor and the high-frequency current sensor, and realizes the on-line detection without turning off the power supply; (3) The invention collects the capacitance sound pressure level generated by the capacitance to be measured through the ultrasonic sensor
(ii) a The high-frequency current sensor collects voltage values at two ends of the capacitor, a capacitance estimation formula is established, the life of the capacitor to be measured is predicted by the formula, the method is more prospective than the conventional method of judging the life of the capacitor by only detecting the actual capacitance of the current capacitor, and a power electronic technology course can be set through the experimental device, so that the method has reference value for evaluating the power capacitor.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments taken in conjunction with the accompanying drawings, in which
FIG. 1 is a block diagram of a wind-solar hybrid simulation experiment apparatus;
FIG. 2 is a functional block diagram of a capacitance test unit;
FIG. 3 is a flow chart of a method of operating a capacitance test unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
As shown in fig. 1, a working method of a wind-solar hybrid simulation experiment device, wherein the wind-solar hybrid simulation experiment device includes: the system comprises a photovoltaic power generation experimental unit, a wind power generation experimental unit and an off-grid inversion module connected with a storage battery; the photovoltaic power generation experimental unit comprises: the photovoltaic grid-connected inverter module, the direct current switch module and the photovoltaic module; the wind power generation experiment unit comprises: the system comprises a wind driven generator module, a main transformer module and a filtering compensation device module; the working method comprises the following steps: during the experiment, each wire is respectively inserted into the input and output holes near each module so as to connect the input end and the output end of the corresponding module.
The corresponding modules refer to that the modules in one experimental unit are connected according to experimental requirements, namely, an output hole of the photovoltaic module is connected with an input hole of the direct current switch module, and an output hole of the direct current switch module is connected with an input hole of the photovoltaic grid-connected inverter module.
The photovoltaic grid-connected inversion module, the direct current switch module, the main transformer module, the filtering compensation device module and the off-grid inversion module are respectively located on the experiment substrate, input and output holes are respectively formed in two sides of each module, and the interface is suitable for being plugged with an experiment wire to construct an experiment circuit.
The modules are circuit modules disclosed in the prior art and used for enabling students to complete experimental wiring and measuring necessary data. Students can carry out corresponding connection according to the requirements of courses, and the practical ability of the students is improved.
Example 2
As shown in fig. 2, the wind-solar hybrid simulation experiment apparatus based on embodiment 1 further includes: a capacitance test unit for carrying out a capacitance in-line detection experiment, the capacitance test unit comprising:
the ultrasonic sensor is used for collecting sound signals generated by the measured capacitor to obtain the corresponding capacitor sound pressure level
。
And the high-frequency current sensor is used for acquiring voltage vectors at two ends of the capacitor.
The ultrasonic sensor and the high-frequency current sensor are respectively connected with the data processing control unit through the corresponding data conditioning unit; namely, the ultrasonic sensor and the high-frequency current sensor are respectively connected with the numerical control processing control unit through the first data conditioning unit and the second data conditioning unit, and the first data conditioning unit and the second data conditioning unit can adopt amplifiers with a certain proportion formed by integrated operational amplifiers.
The data processing control unit includes:
a capacitance superposition voltage calculation module suitable for decomposing the obtained voltage vector into fundamental voltage
Andnsub-harmonic voltage component
I.e. the superimposed voltage across the capacitor under test
I.e. by
Calculating the effective value of the superimposed voltageUWhile calculating the effective value of the fundamental voltageU 0(ii) a Among them, the method for obtaining harmonics and fundamental waves is obtained by FFT operation, and the method is described in a large amount in the prior art documents, for example: li Jia liter and Chaihejie, 9 months 2009, have been described in the paper "research on-line fast detection method of harmonic between harmonic waves of electric energy quality" in the journal "protection and control of electric power system".
A capacitance calculating module suitable for calculating the rated capacitance according to the preset type of the capacitor to be measuredC 0And obtaining the capacitance sound pressure level of the measured capacitance corresponding to the effective value of each fundamental voltage through the capacitance sound pressure level database
(ii) a Obtaining the corresponding capacitance sound pressure level by the sound signal generated by the measured capacitance
By the formula
Calculating the actual capacitance of the measured capacitorC x (ii) a Wherein the capacitance sound pressure level
The method comprises the steps that the method is obtained by establishing a capacitor sound pressure level database, namely, capacitor sound pressure levels corresponding to various types of capacitors and effective values of various fundamental wave voltages are stored in the database, and capacitor sound pressure level data corresponding to the capacitors are searched and obtained from the capacitor sound pressure level database through presetting the types of the input capacitors to be detected and calculating the obtained effective values of the current fundamental wave voltages; calculating corresponding capacitance sound pressure level
In the paper literature: a capacitance noise level calculation method based on a vibration signal, published in the journal of the electronics and technology in 2010 at 6 months, is disclosed.
The module for calculating the life of the measured capacitor is suitable for calculating the actual capacitance of the measured capacitorC x And effective value of the superimposed voltageUEstablishing a capacitance estimation equation, i.e.
(ii) a Wherein the content of the first and second substances,Cthe ultimate capacitance value when the tested capacitor is damaged,tin order to allow the capacitor to be damaged for the expected time,kis the effective value of the measured capacitance at the current fundamental voltage in unit timeU 0The lower corresponding coefficient of change in capacitance, i.e.,
whereinC x1AndC x2is at the effective value of the current fundamental voltageU 0The initial value and the final value of the capacitance of the capacitor to be measured in unit time; coefficient of variation of capacitancekThe method can be obtained by a capacitance change coefficient database established by actual measurement of various types of capacitors under effective values of various fundamental wave voltages, and the capacitance change coefficient database searches for a capacitance change coefficient k corresponding to the capacitor according to the type of the capacitor and the effective value of the corresponding fundamental wave voltage, and the specific acquisition method comprises the following steps: the initial and final values of capacitance of each type of capacitor measured at effective values of fundamental voltage over a period of time are converted to a unit timeAccording to the type of preset tested capacitor and the effective value of current fundamental wave voltage obtained by calculation, the capacitance change coefficient corresponding to the capacitor is searched from the capacitance change coefficient databasekFor convenience of calculation, the variation of the capacitance in unit time is linear; and deducing a calculation formula of the expected time t of the capacitor damage through the capacitance estimation formula, namely
Setting the limit capacitance valueCSo as to calculate the expected time of the tested capacitor being damaged.
The superimposed voltage
The effective value U calculating method of (1) includes: fundamental voltage
Andnsub-harmonic voltage component
The square root of the sum of the squares of the effective values of (a). The above-mentionednSub-harmonic voltage component
InnAnd 5, taking.
The data processing control unit is realized by an FPGA module, namely an FPGA chip XC6SLX9-TQG 144.
Table 1 shows the comparison result between the experimental data and the actual measurement, wherein the power capacitor in table 1 is the gigahua power capacitor BSMJ-0.415-15-315 Kvar, and the limit capacitance C is set to 40% of the original capacity.
TABLE 1 comparison table of experimental data and actual measurement
In the calculation of the capacitance change coefficient k, the capacitance change amount per unit time is 24 hours, that is, the capacitance change amount per day is actually measured to be 0.08uF at 525V fundamental wave effective value.
And the table 2 shows the comparison result between the experimental data and the actual measurement, the Shanghai Weiscon power capacitor BSMJ0.4-15-3 and the capacitor BSMJ 0.45-15-3 are selected as the power capacitor in the table 2, and the limit capacitance value C is set to be 40% of the original capacity.
TABLE 2 comparison table of experimental data and actual measurement
When the capacitance change coefficient k is calculated, the unit time is 24 hours, namely under the 450V fundamental wave effective value, the capacitance change amount of one day is actually measured to be 0.12 uF; or the capacitance change amount of one day is actually measured to be 0.11uF under the 415V fundamental wave effective value.
And table 3 shows the comparison result between the experimental data and the actual measurement, wherein the power capacitor in table 3 is a delaxi self-healing low-voltage capacitor connected in parallel with the power capacitor BSMJS 0.420-3 BSMJ, and the limit capacitance value C is set to be 40% of the original capacity.
TABLE 3 comparison table of experimental data and actual measurement
When the capacitance change coefficient k is calculated, the capacitance change amount per day is actually measured to be 0.063uF in 24 hours, namely under 380V fundamental wave effective value.
The effective value of the fundamental wave in the present invention can be considered as an effective value of the voltage in an ideal state.
As can be seen from tables 1 to 3, the on-line detection of the capacitor of the invention for estimating the residual time of the capacitor is practical and effective, and has the characteristic of high accuracy, and when the actual capacitance of the capacitor is close to the limit capacitance value C when the capacitor is damaged, the settlement result is closer to the actual measurement result. Therefore, the experimental device can complete necessary capacitance online detection experiments, and the data of the experimental device has high reference value; students can deeply understand the use of the power capacitor through the capacitor testing unit, and the subjects of the wind-solar complementary simulation experiment are enriched.
Example 3
As shown in fig. 3, on the basis of embodiment 2, there is provided a working method of a wind-solar hybrid simulation experiment device, wherein the wind-solar hybrid simulation experiment device further includes: the capacitance testing unit is used for carrying out capacitance online detection experiments, and the working method of the capacitance testing unit comprises the following steps:
and S100, obtaining effective values of superposed voltage and fundamental voltage at two ends of the capacitor to be measured.
Collecting voltage vectors at two ends of the capacitor to be measured, and decomposing the voltage vectors into fundamental wave voltage
Andnsub-harmonic voltage component
I.e. the superimposed voltage across the capacitor under test
I.e. by
Calculating the effective value of the superimposed voltageUSimultaneously calculating the effective value U of the fundamental voltage0(ii) a Among them, the method for obtaining harmonics and fundamental waves is obtained by FFT operation, and the method is described in a large amount in the prior art documents, for example: li Jia liter and Chaihejie, 9 months 2009, have been described in the paper "research on-line fast detection method of harmonic between harmonic waves of electric energy quality" in the journal "protection and control of electric power system". The capacitor in the invention is a power capacitor.
Step S200, obtaining the actual capacitance of the measured capacitor.
Establishing a capacitance sound pressure level database, wherein the database comprises: each type of capacitor has a capacitor sound pressure level corresponding to the effective value of each fundamental voltage.
Presetting the type and rated capacitance of the capacitor to be measuredC 0Obtaining the effective value of the measured capacitor at the current fundamental voltage through the capacitor sound pressure level databaseU 0Lower corresponding capacitance sound pressure level
(ii) a Collecting sound signals generated by the tested capacitor to obtain the corresponding capacitor sound pressure level
By the formula
Calculating the actual capacitance of the measured capacitorC x (ii) a Wherein the capacitance sound pressure level
The method comprises the steps that the method is obtained by establishing a capacitor sound pressure level database, namely, capacitor sound pressure levels of various types of capacitors corresponding to effective values of fundamental wave voltages are stored in the database, and capacitor sound pressure level data corresponding to the capacitors are searched and obtained from the capacitor sound pressure level database through presetting the types of the input capacitors to be detected and calculating the obtained effective values of the current fundamental wave voltages; wherein only each fundamental voltage refers to a non-harmonic voltage; calculating corresponding capacitance sound pressure level
In the paper literature: a capacitance noise level calculation method based on a vibration signal, published in the journal of the electronics and technology in 2010 at 6 months, is disclosed.
Step S300, calculating the expected time of the damage of the capacitor to be measured by establishing a capacitance estimation formula.
In step S310, a capacitance estimation formula and a capacitance variation coefficient k calculation formula are established.
According to the actual capacitance of the measured capacitorC x And effective value of the superimposed voltageUEstablishing a capacitance estimation equation, i.e.
(ii) a Wherein the content of the first and second substances,Cthe ultimate capacitance value when the tested capacitor is damaged,tin order to allow the capacitor to be damaged for the expected time,kis the effective value of the measured capacitance at the current fundamental voltage in unit timeU 0The lower corresponding coefficient of change in capacitance, i.e.,
，C x1andC x2is at the effective value of the current fundamental voltageU 0The initial value and the final value of the capacitance of the capacitor to be measured in unit time; coefficient of variation of capacitancekThe capacitance change coefficient database is obtained by actually measuring effective values of various types of capacitors and only various fundamental wave voltages and searching the capacitance change coefficient database according to the type of the capacitor and the effective value of the corresponding fundamental wave voltage to obtain the capacitance change coefficient corresponding to the capacitorkThe specific acquisition method comprises the following steps: the initial and final capacitance values of each type of capacitance measured under the effective values of various fundamental wave voltages in a period of time are converted to corresponding initial and final capacitance values in a unit time, and the effective value of the current fundamental wave voltage is obtained by calculation according to the type of the preset capacitance to be measured and the capacitance variation coefficient corresponding to the capacitance is searched from the capacitance variation coefficient databasekFor convenience of calculation, it is assumed that the change amount of the capacitance per unit time is linear.
Step S320, calculating an expected time of the detected capacitor being damaged.
Deducing the expected time of capacitor damage through the capacitance estimation formulatIs calculated by the formula (i)
Setting the limit capacitance valueCCalculating the expected time of the damage of the measured capacitor, namely the service life of the measured capacitor; wherein the ultimate capacitance valueCThe threshold value which is set manually and also gives out warning for the capacitance is convenient for carrying out online evaluation on the capacitanceAnd (6) estimating.
Further, the effective value of the superimposed voltageUBy a fundamental voltage
Andnsub-harmonic voltage component
The square root value of the sum of the squares of the effective values of (a) is obtained.
Further, in consideration of harmonic energy distribution, thenSub-harmonic voltage component
InnAnd 5, taking.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (1)
1. A working method of a wind-solar hybrid simulation experiment device is characterized in that the wind-solar hybrid simulation experiment device comprises the following steps:
the system comprises a photovoltaic power generation experimental unit, a wind power generation experimental unit and an off-grid inversion module connected with a storage battery;
the photovoltaic power generation experimental unit comprises: the photovoltaic grid-connected inverter module, the direct current switch module and the photovoltaic module;
the wind power generation experiment unit comprises: the system comprises a wind driven generator module, a main transformer module and a filtering compensation device module;
the working method comprises the following steps: during the experiment, each lead is respectively inserted into the input and output holes near each module so as to connect the input end and the output end of the corresponding module;
the wind-solar hybrid simulation experiment device further comprises: a capacitance testing unit for carrying out capacitance on-line detection experiments,
the capacitance test unit includes:
the ultrasonic sensor is used for collecting the sound signal generated by the measured capacitor to obtain the corresponding capacitor sound pressure level Lpx；
The high-frequency current sensor is used for collecting voltage vectors at two ends of the capacitor;
the ultrasonic sensor and the high-frequency current sensor are respectively connected with the data processing control unit through the corresponding data conditioning unit;
the working method of the capacitance testing unit comprises the following steps:
the method comprises the following steps: collecting voltage vectors at two ends of the measured capacitor, and decomposing the voltage vectors into fundamental wave voltage u0(t) and nth harmonic voltage components
The superposed voltage u (t) at the two ends of the capacitor to be measured can be obtained, namely
Then, the effective value U of the superimposed voltage and the effective value U of the fundamental voltage are calculated0；
Step two: establishing a capacitance sound pressure level database, wherein the database comprises: the sound pressure level of each type of capacitor corresponding to the effective value of only the fundamental voltage;
presetting the type of the capacitor to be measured and the rated capacitance C0According to the type of the measured capacitor and the current effective value U of the fundamental voltage0Obtaining a corresponding capacitance sound pressure level from the database of capacitance sound pressure levels
Collecting sound signals generated by the tested capacitor to obtain the corresponding capacitor sound pressure level
By the formula
Calculating the actual capacitance C of the measured capacitorx；
Step three: according to the actual capacitance C of the measured capacitorxEstablishing a capacitance estimation formula with the effective value U of the superposed voltage, namely C ═ Cx-kUt; wherein, C is the limit capacitance value when the measured capacitor is damaged, t is the expected time of the capacitor damage, and k is the effective value U of the measured capacitor at the current fundamental voltage in unit time0The lower corresponding coefficient of change in capacitance, i.e.,
wherein, Cx1And Cx2The initial value and the final value of the capacitance of the measured capacitor in unit time are shown;
setting the limit capacitance value C, and deducing a calculation formula of the expected time t of the capacitor damage through the capacitance estimation formula, namely
To calculate the expected time of the damage of the tested capacitor; the effective value U of the superimposed voltage is obtained by the fundamental voltage U0(t) and nth harmonic voltage components
Obtaining a square root value of the sum of squares of the effective values;
the nth harmonic voltage component
Wherein n is 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259015 | 2014-06-11 | ||
| CN201410259015X | 2014-06-11 | ||
| CN201410480111.7A CN105319459B (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
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| CN201711077612.0A Withdrawn CN107861003A (en) | 2014-06-11 | 2014-09-18 | Wind light mutual complementing nature imitation experiment device |
| CN201711075357.6A Withdrawn CN107607823A (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN201711245009.9A Active CN107991563B (en) | 2014-06-11 | 2014-09-18 | Wind-solar complementary simulation experiment device for power supply and distribution and grid-connected experiment and working method |
| CN201711077613.5A Withdrawn CN107843790A (en) | 2014-06-11 | 2014-09-18 | For the method for work for distribution, the wind light mutual complementing nature imitation experiment device of grid-connected experiment |
| CN201711242401.8A Withdrawn CN108008219A (en) | 2014-06-11 | 2014-09-18 | Wind light mutual complementing nature imitation experiment device |
| CN201711242404.1A Withdrawn CN107782999A (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN201711077611.6A Withdrawn CN107807291A (en) | 2014-06-11 | 2014-09-18 | For the wind light mutual complementing nature imitation experiment device for distribution, grid-connected experiment |
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| CN201711077612.0A Withdrawn CN107861003A (en) | 2014-06-11 | 2014-09-18 | Wind light mutual complementing nature imitation experiment device |
| CN201711075357.6A Withdrawn CN107607823A (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
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| CN201711242401.8A Withdrawn CN108008219A (en) | 2014-06-11 | 2014-09-18 | Wind light mutual complementing nature imitation experiment device |
| CN201711242404.1A Withdrawn CN107782999A (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
| CN201711077611.6A Withdrawn CN107807291A (en) | 2014-06-11 | 2014-09-18 | For the wind light mutual complementing nature imitation experiment device for distribution, grid-connected experiment |
| CN201410480111.7A Active CN105319459B (en) | 2014-06-11 | 2014-09-18 | A kind of method of work of wind light mutual complementing nature imitation experiment device |
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| 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 |
| CN110649656B (en) * | 2019-10-14 | 2023-03-24 | 国网山东省电力公司莱芜供电公司 | Grid-connected system of photovoltaic power station |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108037386B (en) | 2020-11-06 |
| CN107843790A (en) | 2018-03-27 |
| CN107991563A (en) | 2018-05-04 |
| CN107807291A (en) | 2018-03-16 |
| CN105319459A (en) | 2016-02-10 |
| CN107861003A (en) | 2018-03-30 |
| CN105319459B (en) | 2018-02-06 |
| CN107607823A (en) | 2018-01-19 |
| CN107782999A (en) | 2018-03-09 |
| CN108008219A (en) | 2018-05-08 |
| CN108037386A (en) | 2018-05-15 |
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