CN105203865B - The method of work of the Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity - Google Patents
The method of work of the Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity Download PDFInfo
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- CN105203865B CN105203865B CN201410479833.0A CN201410479833A CN105203865B CN 105203865 B CN105203865 B CN 105203865B CN 201410479833 A CN201410479833 A CN 201410479833A CN 105203865 B CN105203865 B CN 105203865B
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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
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Abstract
The present invention relates to the method for work of a kind of distributed electrical source grid-connected inverter and the Online Transaction Processing of electric capacity, wherein, the Online Transaction Processing, including：H bridge inverters, the H bridge inverters are controlled by a control unit；The method of work of the Online Transaction Processing, including：Described control unit sets up the input of the H bridge inverters, output voltage database, is inputted by gathering the inputs of the H bridge inverters, output voltage with the H bridge inverters in database, compared with output voltage, to judge whether H electrical bridge inverter damages.
Description
Technical field
The present invention relates to a kind of field of power electronics, more particularly to a kind of distributed electrical source grid-connected inverter and electric capacity
The method of work of line test system.
Background technology
As originally more distributed generation systems access power network, various countries' grid company is all carried to distributed generation system
New strict demand is gone out, that is, has required that distributed generation system can continue to be incorporated into the power networks and sent when power network breaks down
Work(idle supports power network.Therefore distributed generation system will carry out the test of power network adaptability before grid-connected, so
And because the target of power network is to provide the three phase sine voltage of standard, various forms of electric network faults are not common.Therefore right
When distributed generation system is tested, only by power network be difficult reproduction be out of order situation, it is necessary to special equipment or instrument come
Simulate above-mentioned failure.
The content of the invention
It is an object of the invention to provide the work of a kind of distributed electrical source grid-connected inverter and the Online Transaction Processing of electric capacity
Method, which solves the technical problem that on-line checking is carried out to H bridge inverters.
In order to solve the above-mentioned technical problem, the invention provides the online of a kind of distributed electrical source grid-connected inverter and electric capacity
The method of work of test system, wherein, the Online Transaction Processing includes：H bridge inverters, the H bridge inverters are single by a control
Member control；The method of work of the Online Transaction Processing includes：Described control unit sets up the inputting of the H bridge inverters, defeated
Go out voltage data storehouse, the input of the H bridge inverters in input, output voltage and the database by gathering the H bridge inverters,
Output voltage compares, to judge whether H electrical bridge inverter damages.
Further, the Online Transaction Processing also includes：Capacity measurement unit for carrying out electric capacity on-line checking, it is described
The method of work of capacity measurement unit comprises the following steps：
Step one：The voltage vector at measured capacitance two ends is gathered, and the voltage vector is decomposited into fundamental voltage u0(t) and
Nth harmonic component of voltage un(t), i.e. the superimposed voltage u (t) at the measured capacitance two ends, i.e. u (t)=u0(t)+un(t), count
Calculate the virtual value U of the superimposed voltage, the virtual value U of fundamental voltage0。
Step 2：Electric capacity sound pressure level database is set up, the database includes：All types of electric capacity are in only each fundamental voltage
Virtual value distinguish corresponding electric capacity sound pressure level.
Default measured capacitance type, rated capacitance C0, according to measured capacitance type and the virtual value U of current fundamental voltage0
Corresponding capacitance sound pressure level L is obtained from the electric capacity sound pressure level databasep0。
The voice signal that measured capacitance is produced is gathered, to obtain corresponding capacitance sound pressure level Lpx, pass through formulaCalculate the actual capacitance C of measured capacitancex。
Step 3：According to the actual capacitance C of measured capacitancexCapacitance, which is set up, with the virtual value U of superimposed voltage estimates public affairs
Formula, i.e. C=Cx-kUt；Wherein, C is extreme capacitance values when measured capacitance is damaged, and t is capacitance damage expeced time, and k is unit
Virtual value U of the measured capacitance in current fundamental voltage in time0Under corresponding electric capacitance change coefficient, i.e.
Wherein, Cx1And Cx2For the capacitance initial value and final value of measured capacitance in the unit time.
The extreme capacitance values C is set, capacitance damage t expeced time meter is derived by the capacitance predictor formula
Formula is calculated, i.e.,To calculate the expeced time that measured capacitance is damaged.
Further, the virtual value U of the superimposed voltage passes through fundamental voltage u0(t) with nth harmonic component of voltage un(t)
The square root of virtual value quadratic sum is obtained.
Further, the nth harmonic component of voltage un(t) n takes 5 in.
The above-mentioned technical proposal of the present invention has advantages below compared with prior art：(1) present invention is single by the control
Member sets up the input of the H bridge inverters, output voltage database, by the input, the output voltage that gather the H bridge inverters
Compared with the H bridge inverters input in database, output voltage, to judge whether H electrical bridge inverter damages, this method tool
Have simple in real time, the advantage of good reliability；(2) present invention combines ultrasonic sensor and High Frequency Current Sensor, real
The on-line checking of power supply need not be closed by having showed；(3) present invention gathers the electric capacity sound that measured capacitance is produced by ultrasonic sensor
Arbitrarily downgrade Lpx；The magnitude of voltage at High Frequency Current Sensor collection electric capacity two ends, sets up capacitance predictor formula, using the formula to tested
The life-span of electric capacity is predicted, before judging that the electric capacity life-span more has than traditional only detection capacitance present actual capacitance
Looking forward or upwards property.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, below according to specific embodiment and with reference to accompanying drawing,
The present invention is further detailed explanation, wherein
Fig. 1 is the structured flowchart of the Online Transaction Processing；
Fig. 2 is the theory diagram of the capacity measurement unit；
Fig. 3 is the flow chart of the method for work of the capacity measurement unit.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring this
The concept of invention.
Embodiment 1
As shown in figure 1, a kind of method of work of the Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity, its
In, the Online Transaction Processing includes：H bridge inverters, the H bridge inverters are controlled by a control unit；The on-line testing system
The method of work of system includes：Described control unit sets up the input of the H bridge inverters, output voltage database, passes through collection
The inputs of the H bridge inverters, output voltage are compared with the H bridge inverters input in database, output voltage, to judge
Whether H electrical bridge inverter damages.
The present invention builds three-phase H bridge inverters by using IGBT switching techniques, and control unit is accordingly controlled H electrical bridge
Technical scheme be disclosed in lot of documents, for example：EMS EMSs can realize above-mentioned control function.
The step of described control unit sets up the input of the H bridge inverters, output voltage database includes：By to each
The input of the H bridge inverters of type, output voltage are sampled to obtain standard value, that is, set up the input, output voltage number
According to storehouse, when control unit detects tested H bridge inverters under present input voltage, its output voltage and the output in database
Voltage is not inconsistent, that is, judges the H bridge inverter failures.
Input, output voltage are acquired, can be realized by step-down transformer, A/D module, processor unit, is belonged to
In prior art.
Embodiment 2
As shown in Fig. 2 the Online Transaction Processing on the basis of embodiment 1 also includes：Examined online for carrying out electric capacity
The capacity measurement unit of survey, the capacity measurement unit includes：
Ultrasonic sensor, the voice signal for gathering measured capacitance generation, to obtain corresponding capacitance sound pressure level Lpx。
High Frequency Current Sensor, the voltage vector for gathering electric capacity two ends.
The ultrasonic sensor, High Frequency Current Sensor pass through corresponding data conditioning unit and data processing and control respectively
Unit is connected；That is, ultrasonic sensor, High Frequency Current Sensor respectively by first, second data conditioning unit and numerical control at
Control unit is managed to be connected, and first, second data conditioning unit can be using the certain proportion being made up of integrated operational amplifier
Amplifier.
The data processing and control subelement, including：
Electric capacity superimposed voltage computing module, suitable for the voltage vector of acquisition is decomposited into fundamental voltage u0And nth harmonic (t)
Component of voltage un(t), i.e. the superimposed voltage u (t) at the measured capacitance two ends, i.e. u (t)=u0(t)+un(t) superposition, is calculated
The virtual value U of voltage, while calculating the virtual value U of fundamental voltage0；Wherein, obtaining harmonic wave and the method for fundamental wave is transported by FFT
Obtain, this method existing a large amount of descriptions in the prior art document, for example：Outstanding in the September, 2009 of Li Jiasheng, bavin generation is published in the phase
Periodical《Electric power system protection and control》On paper " electric energy quality harmonic m-Acetyl chlorophosphonazo on-line quick detection technique study " in it is existing
Associated description.
Capacitance computing module, suitable for according to default measured capacitance type, rated capacitance C0, pass through the electric capacity acoustic pressure
DBMS storehouse obtains measured capacitance electric capacity sound pressure level L corresponding with the virtual value of only each fundamental voltagep0；Produced by measured capacitance
Raw voice signal, to obtain corresponding capacitance sound pressure level Lpx, pass through formulaCalculate measured capacitance
Actual capacitance Cx；Wherein, the electric capacity sound pressure level Lp0Obtained by way of setting up electric capacity sound pressure level database, i.e. the data
The all types of electric capacity that are stored with storehouse electric capacity sound pressure level corresponding with the virtual value of each fundamental voltage, passes through default input measured capacitance
Type, and obtained by calculating current fundamental voltage virtual value, obtain the electric capacity pair from electric capacity sound pressure level database lookup
The electric capacity acoustic pressure DBMS answered；Calculate corresponding capacitance sound pressure level LpxMethod in paper document：In June, 2010 is published in《Electronics
Technology》The capacitor noise level calculation method based on vibration signal in be disclosed.
Measured capacitance life-span computing module, suitable for the actual capacitance C according to measured capacitancexWith the virtual value of superimposed voltage
U sets up capacitance predictor formula, i.e. C=Cx-kUt；Wherein, C is extreme capacitance values when measured capacitance is damaged, and t damages for electric capacity
Bad expeced time, k is virtual value U of the measured capacitance in current fundamental voltage in the unit time0Under corresponding electric capacitance change system
Number, i.e.Wherein Cx1And Cx2For in the virtual value U of current fundamental voltage0Under unit interval in measured capacitance
Capacitance initial value and final value；Electric capacitance change coefficient k can be passed through according to all types of electric capacity under the virtual value of each fundamental voltage
The electric capacitance change coefficient data storehouse for crossing actual measurement foundation is obtained, and the electric capacitance change coefficient data storehouse is according to electric capacity model and accordingly
The virtual value of fundamental voltage is searched and obtains the corresponding electric capacitance change coefficient k of the electric capacity, its specific acquisition methods：Various fundamental wave electricity
Capacitance initial value and final value of the measured all types of electric capacity within a period of time under the virtual value of pressure, then converse a unit
Corresponding capacitance initial value and final value in time, according to the type of default measured capacitance, and calculate resulting current fundamental wave electricity
The virtual value of pressure, what is searched from electric capacitance change coefficient data storehouse goes out the corresponding electric capacitance change coefficient k of the electric capacity, in order to just
In calculating, if variable quantity of the electric capacity within the unit interval is linear；And electric capacity is derived by the capacitance predictor formula
T expeced time calculation formula is damaged, i.e.,The extreme capacitance values C is set, is damaged with calculating measured capacitance
Bad expeced time.
The virtual value U computational methods of the superimposed voltage u (t) include：Fundamental voltage u0(t) with nth harmonic component of voltage un
(t) square root of virtual value quadratic sum.The nth harmonic component of voltage un(t) n takes 5 in.
The data processing and control subelement is realized by FPGA module, i.e. fpga chip XC6SLX9-TQG144.
Table 1 is experimental data and actual measurement comparing result one, and the electric capacitor of table 1 selects huge magnificent electric capacitor BSMJ-
0.415-15-3 15Kvar, set the extreme capacitance values C as the 40% of former capacity.
The experimental data of table 1 and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, i.e., under 525V fundamental wave virtual values, one
It capacitance change is 0.08uF through actual measurement.
Table 2 is experimental data and actual measurement comparing result two, and the electric capacitor of table 2 selects Shanghai Wei Sikang electric capacitors
BSMJ0.4-15-3 and electric capacity BSMJ 0.45-15-3, sets the extreme capacitance values C as the 40% of former capacity.
The experimental data of table 2 and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, i.e., under 450V fundamental wave virtual values, one
It capacitance change is 0.12uF through actual measurement；Or under 415V fundamental wave virtual values, the capacitance change of one day is by actual measurement
0.11uF。
Table 3 is experimental data and actual measurement comparing result three, and the electric capacitor of table 3 selects De Lixi self-healing low-voltage capacitors
The parallel power condenser BSMJS0.4 20-3BSMJ, set the extreme capacitance values C as the 40% of former capacity.
The experimental data of table 3 and the actual measurement table of comparisons
Wherein, when calculating electric capacitance change coefficient k, the unit interval is 24 hours, i.e., under 380V fundamental wave virtual values, one
It capacitance change is 0.063uF through actual measurement.
Fundamental wave virtual value in the present invention is it is also assumed that be voltage effective value ideally.
From table 1 to table 3 as can be seen that the present invention electric capacity on-line checking estimate electric capacity remaining time be it is effective,
With accuracy it is high the characteristics of, during extreme capacitance values C when close to electric capacity actual capacitance close to capacitance damage, settled accounts
As a result closer to measured result.Therefore, the Online Transaction Processing can complete necessary electric capacity on-line checking, and it detects that data are
It is sufficiently close to real data, can be completely used for estimating electric capacity service life.
Embodiment 3
As shown in figure 3, there is provided the method for work of the Online Transaction Processing on the basis of embodiment 2, wherein, it is described
Online Transaction Processing also includes：Capacity measurement unit for carrying out electric capacity on-line checking, the work of the capacity measurement unit
Method comprises the following steps：
Step S100, obtains superimposed voltage, the virtual value of fundamental voltage at measured capacitance two ends.
The voltage vector at measured capacitance two ends is gathered, and the voltage vector is decomposited into fundamental voltage u0And nth harmonic (t)
Component of voltage un(t), i.e. the superimposed voltage u (t) at the measured capacitance two ends, i.e. u (t)=u0(t)+un(t) superposition, is calculated
The virtual value U of voltage, while calculating the virtual value U of fundamental voltage0；Wherein, obtaining harmonic wave and the method for fundamental wave is transported by FFT
Obtain, this method existing a large amount of descriptions in the prior art document, for example：Outstanding in the September, 2009 of Li Jiasheng, bavin generation is published in the phase
Periodical《Electric power system protection and control》On paper " electric energy quality harmonic m-Acetyl chlorophosphonazo on-line quick detection technique study " in it is existing
Associated description.Electric capacity is electric capacitor in the present invention.
Step S200, obtains the actual capacitance of measured capacitance.
Electric capacity sound pressure level database is set up, the database includes：All types of electric capacity are effective only each fundamental voltage
Value distinguishes corresponding electric capacity sound pressure level.
Default measured capacitance type, rated capacitance C0, measured capacitance is obtained by the electric capacity sound pressure level database and existed
The virtual value U of current fundamental voltage0Under corresponding electric capacity sound pressure level Lp0；The voice signal that measured capacitance is produced is gathered, to obtain
Corresponding capacitance sound pressure level Lpx, pass through formulaCalculate the actual capacitance C of measured capacitancex；Wherein,
The electric capacity sound pressure level Lp0Obtained by way of setting up electric capacity sound pressure level database, i.e., be stored with all types of electricity in the database
Hold electric capacity sound pressure level corresponding with the virtual value of only each fundamental voltage, pass through the type of default input measured capacitance, Yi Jiji
The virtual value of current fundamental voltage, the corresponding electric capacity sound pressure level of the electric capacity is obtained from electric capacity sound pressure level database lookup obtained by calculating
Data；Wherein, only each fundamental voltage refers to no harmonic voltage；Calculate corresponding capacitance sound pressure level LpxMethod paper text
Offer：In June, 2010 is published in《Electronic technology journal》The capacitor noise level calculation method based on vibration signal in it is public
Open.
Step S300, by setting up capacitance predictor formula, calculates the expeced time that measured capacitance is damaged.
Step S310, sets up capacitance predictor formula and electric capacitance change coefficient k calculation formula.
According to the actual capacitance C of measured capacitancexCapacitance predictor formula, i.e. C=are set up with the virtual value U of superimposed voltage
Cx-kUt；Wherein, C is extreme capacitance values when measured capacitance is damaged, and t is capacitance damage expeced time, and k is quilt in the unit time
Survey virtual value U of the electric capacity in current fundamental voltage0Under corresponding electric capacitance change coefficient, i.e.Cx1And Cx2For
In the virtual value U of current fundamental voltage0Under unit interval in measured capacitance capacitance initial value and final value；Electric capacitance change system
Number k can be according to the virtual value of all types of electric capacity and only each fundamental voltage by surveying the electric capacitance change coefficient data set up
Storehouse is obtained, and the electric capacitance change coefficient data storehouse is searched according to the virtual value of electric capacity model and corresponding fundamental voltage and obtains the electric capacity
Corresponding electric capacitance change coefficient k, its specific acquisition methods：Measured all types of electric capacity under the virtual value of various fundamental voltages
Capacitance initial value and final value within a period of time, then converse corresponding capacitance initial value and final value in a unit interval,
According to the type of default measured capacitance, and the virtual value of resulting current fundamental voltage is calculated, from electric capacitance change coefficient number
Go out the corresponding electric capacitance change coefficient k of the electric capacity according to what is searched in storehouse, for the ease of calculating, if change of the electric capacity within the unit interval
Change amount is linear.
Step S320, calculates the expeced time that measured capacitance is damaged.
Capacitance damage t expeced time calculation formula is derived by the capacitance predictor formula, i.e.,If
The fixed extreme capacitance values C, to calculate the service life of the expeced time that measured capacitance is damaged, i.e. measured capacitance；Its
In, extreme capacitance values C is by being manually set, the threshold value also given a warning for capacitance, is easy to carry out online evaluation to electric capacity.
Further, the virtual value U of the superimposed voltage passes through fundamental voltage u0(t) with nth harmonic component of voltage un(t)
The square root of virtual value quadratic sum is obtained.
Further, it is contemplated that harmonic energy is distributed, the nth harmonic component of voltage un(t) n takes 5 in.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Principle, without being construed as limiting the invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent substitution, improvement etc., should be included in the scope of the protection.In addition, appended claims purport of the present invention
Scope and border or this scope and border are fallen into covering.
Claims (3)
1. the method for work of the Online Transaction Processing of a kind of distributed electrical source grid-connected inverter and electric capacity, it is characterised in that described
Online Transaction Processing includes：H bridge inverters, the H bridge inverters are controlled by a control unit；
The method of work of the Online Transaction Processing includes：Described control unit sets up the input of the H bridge inverters, output electricity
Press H bridge inverters input, the output in database, input, output voltage and the database by gathering the H bridge inverters
Voltage compares, to judge whether H electrical bridge inverter damages；
The method of work of the Online Transaction Processing also includes：Capacity measurement unit for carrying out electric capacity on-line checking, it is described
The method of work of capacity measurement unit comprises the following steps：
Step one：The voltage vector at measured capacitance two ends is gathered, and the voltage vector is decomposited into fundamental voltage u0(t) it is humorous with n times
Wave voltage component un(t), you can draw the superimposed voltage u (t) at the measured capacitance two ends, i.e. u (t)=u0(t)+un(t), so
The virtual value U of the superimposed voltage, the virtual value U of fundamental voltage are calculated afterwards0；
Step 2：Electric capacity sound pressure level database is set up, the database includes：All types of electric capacity with only each fundamental voltage
Virtual value distinguishes corresponding electric capacity sound pressure level；
Default measured capacitance type, rated capacitance C0, according to measured capacitance type and the virtual value U of current fundamental voltage0From institute
State electric capacity sound pressure level database and obtain corresponding capacitance sound pressure level Lp0；
The voice signal that measured capacitance is produced is gathered, to obtain corresponding capacitance sound pressure level Lpx, pass through formula
Calculate the actual capacitance C of measured capacitancex；
Step 3：According to the actual capacitance C of measured capacitancexCapacitance predictor formula, i.e. C are set up with the virtual value U of superimposed voltage
=Cx-kUt；Wherein, C is extreme capacitance values when measured capacitance is damaged, and t is capacitance damage expeced time, and k is in the unit time
Virtual value U of the measured capacitance in current fundamental voltage0Under corresponding electric capacitance change coefficient, i.e.Wherein,
Cx1And Cx2For the capacitance initial value and final value of measured capacitance in the unit time；
The extreme capacitance values C is set, derives that capacitance damage t expeced time calculating is public by the capacitance predictor formula
Formula, i.e.,To calculate the expeced time that measured capacitance is damaged.
2. the method for work of Online Transaction Processing according to claim 1, it is characterised in that the superimposed voltage it is effective
Value U passes through fundamental voltage u0(t) with nth harmonic component of voltage un(t) square root of virtual value quadratic sum is obtained.
3. the method for work of Online Transaction Processing according to claim 2, it is characterised in that the nth harmonic voltage point
Measure un(t) n takes 5 in.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410479833.0A CN105203865B (en) | 2014-06-11 | 2014-09-18 | The method of work of the Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity |
| CN201710794762.7A CN107436415B (en) | 2014-06-11 | 2014-09-18 | Working method of online testing system for distributed power grid-connected inverter and capacitor |
| CN201710794765.0A CN107561410B (en) | 2014-06-11 | 2014-09-18 | Online testing system for distributed power supply grid-connected inverter and capacitor |
| CN201710819231.9A CN107621582B (en) | 2014-06-11 | 2014-09-18 | Online testing system for grid-connected inverter and capacitor and working method thereof |
| CN201710794720.3A CN107589324B (en) | 2014-06-11 | 2014-09-18 | Online testing system for grid-connected inverter and capacitor |
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| CN201710794762.7A Division CN107436415B (en) | 2014-06-11 | 2014-09-18 | Working method of online testing system for distributed power grid-connected inverter and capacitor |
| CN201710819231.9A Division CN107621582B (en) | 2014-06-11 | 2014-09-18 | Online testing system for grid-connected inverter and capacitor and working method thereof |
| CN201710794765.0A Division CN107561410B (en) | 2014-06-11 | 2014-09-18 | Online testing system for distributed power supply grid-connected inverter and capacitor |
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| CN201710794720.3A Expired - Fee Related CN107589324B (en) | 2014-06-11 | 2014-09-18 | Online testing system for grid-connected inverter and capacitor |
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| CN109596875B (en) * | 2018-12-04 | 2023-08-18 | 国网湖北省电力有限公司电力科学研究院 | Method and device for detecting waveform abnormality of output voltage of H-bridge power unit |
| CN109596894A (en) * | 2019-01-02 | 2019-04-09 | 厦门科华恒盛股份有限公司 | Ac capacitor on-line monitoring method and device |
| CN112564287A (en) * | 2020-12-12 | 2021-03-26 | 国网新源控股有限公司回龙分公司 | Simple system for monitoring running state of power equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436415A (en) * | 2014-06-11 | 2017-12-05 | 钱珺佳 | The method of work of the Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity |
| CN107561410A (en) * | 2014-06-11 | 2018-01-09 | 钱珺佳 | A kind of Online Transaction Processing of distributed electrical source grid-connected inverter and electric capacity |
| CN107436415B (en) * | 2014-06-11 | 2020-12-08 | 合肥布诺太阳能科技有限公司 | Working method of online testing system for distributed power grid-connected inverter and capacitor |
| CN107561410B (en) * | 2014-06-11 | 2021-04-27 | 武汉益仁教育培训咨询合伙企业(有限合伙) | Online testing system for distributed power supply grid-connected inverter and capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107561410A (en) | 2018-01-09 |
| CN107436415B (en) | 2020-12-08 |
| CN107561410B (en) | 2021-04-27 |
| CN105203865A (en) | 2015-12-30 |
| CN107436415A (en) | 2017-12-05 |
| CN107621582A (en) | 2018-01-23 |
| CN107589324B (en) | 2019-12-27 |
| CN107589324A (en) | 2018-01-16 |
| CN107621582B (en) | 2019-12-24 |
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