CN105162409B - The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic - Google Patents
The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic Download PDFInfo
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- CN105162409B CN105162409B CN201510607355.1A CN201510607355A CN105162409B CN 105162409 B CN105162409 B CN 105162409B CN 201510607355 A CN201510607355 A CN 201510607355A CN 105162409 B CN105162409 B CN 105162409B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a kind of embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic.There is the defect using inconvenience and poor reliability in the anti-theft electricity technology for being currently based on microprocessor.The present invention includes that DC Module is anti-electricity-theft and calculates communication unit and the anti-electricity-theft calculating communication unit of AC module, is designed and installs according to the grid-connected modular electric power generation system of corresponding distributed photovoltaic；The anti-electricity-theft warning circuit for calculating communication unit of DC Module carries out display lamp and buzzing after any one stealing alarm signal of RS485 communication interfaces immediately and reports to the police receiving；After judging electricity filching behavior to occur or receives from any one stealing alarm signal of RS485 communication interfaces, the anti-electricity-theft communication unit that calculates of AC module carries out display lamp and buzzing warning immediately.The present invention can recognize the grid-connected modular electric power generation system of distributed photovoltaic with the presence or absence of electricity filching behavior, while can accurately calculate power-steeling quantity and carry out alert process when there is electricity filching behavior.
Description
Technical field
The invention belongs to distributed photovoltaic grid-connected system anti-theft electricity technology field, especially a kind of suitable for distributed
The embedded anti-electricity-theft device of grid-connected modular electric power generation system.
Background technology
It is the principal mode of current solar energy power generating that distributed photovoltaic generates electricity by way of merging two or more grid systems, and country is in order to promote distributed light
The application of photovoltaic grid-connected system, has put into effect the policy of photovoltaic generation rate for incorporation into the power network subsidy.But lawless person is subsidized in electricity price
Profit temptation under, taking carries out reconfiguration and increases photovoltaic generation gauge table with falseness showing
Value, the means such as electrical network are fed back to by the DC/AC changers of photovoltaic generating system from after the direct power taking of electrical network illegally obtain electricity price
Subsidy.
With the continuous expansion of distributed photovoltaic grid-connected system scale, the degree of scatter more and more higher of system component,
And stealing electricity method is varied, the difficulty that this causes distributed photovoltaic grid-connected system anti-electricity-theft is larger.Distributed photovoltaic is simultaneously
What net electricity generation system was anti-electricity-theft focuses on monitoring the gross generation and the one of grid-connected DC/AC changers output of photovoltaic module
Cause property.Stealing poor in timeliness is manually investigated, and the stealing information such as accurate stealing time, power-steeling quantity can not be provided.
Occur in that some anti-theft electricity technologies based on microprocessor at present, such as according to sunlight irradiation intensity real time data and
Photovoltaic module installation number calculates actual photovoltaic power generation quantity the skill with system grid connection generated energy measured value multilevel iudge stealing
Art, sets up the skill that thief-proof electric model judges stealing using history meteorological data and same period photovoltaic generation data and using intelligent algorithm
Art etc..There is the defect using inconvenience and poor reliability in these anti-theft electricity technologies.
The content of the invention
The technical problem to be solved is the defect for overcoming above-mentioned prior art to exist, there is provided a kind of being applied to is divided
The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of cloth, it can recognize the grid-connected module elelctrochemical power generation of distributed photovoltaic
System whether there is electricity filching behavior, while can accurately calculate power-steeling quantity and carry out alert process when there is electricity filching behavior.
For this purpose, the present invention is adopted the following technical scheme that：The grid-connected modular electric power generation system of distributed photovoltaic is embedded thief-proof
Electric installation, including Integer N identical DC Module it is anti-electricity-theft calculate communication unit and M identical AC module of integer it is thief-proof
Electricity calculates communication unit, and the embedded anti-electricity-theft device is set according to the grid-connected modular electric power generation system of corresponding distributed photovoltaic
Meter and installation；
The grid-connected modular electric power generation system of described distributed photovoltaic includes Integer N identical photovoltaic module, Integer N phase
With DC/DC changers, dc bus, M identical DC/AC changer of integer, ac bus, user load, electric energy meter and
Low-voltage network, the photovoltaic module of each group string data structure are connected with dc bus by a corresponding DC/DC changer,
The direct-flow input end of each DC/AC changer is connected with dc bus, the ac output end of each DC/AC changer with exchange mother
Line is connected, and user load is connected with ac bus, and electric energy meter is connected between ac bus and low-voltage network carries out two-way electricity
Can measure, ac bus voltage waveform is identical with low-voltage network voltage waveform；
The anti-electricity-theft communication unit that calculates of described DC Module includes current/voltage Acquisition Circuit, microprocessor, electricity of reporting to the police
Road and RS485 communication interfaces, its DC/DC changers design simultaneously with the grid-connected modular electric power generation system of distributed photovoltaic, each
DC Module is anti-electricity-theft to calculate one direct current mould being packaged together of communication unit and corresponding single DC/DC changers composition
Block, by measuring corresponding photovoltaic component DC output voltage and electric current, calculating should for the anti-electricity-theft communication unit that calculates of DC Module
The output of photovoltaic module, the output and DC Module serial number information of photovoltaic module are defeated by RS485 communication interfaces
Go out, warning circuit receive carried out after any one stealing alarm signal of RS485 communication interfaces immediately display lamp and
Buzzing is reported to the police；
The anti-electricity-theft communication unit that calculates of described AC module includes current/voltage Acquisition Circuit, microprocessor, electricity of reporting to the police
Road and RS485 communication interfaces, its DC/AC changers design simultaneously with the grid-connected modular electric power generation system of distributed photovoltaic, each
AC module is anti-electricity-theft to calculate communication unit and corresponding single DC/AC changers composition one is packaged together exchanges mould
Block, the anti-electricity-theft communication unit that calculates of AC module are calculated by measuring corresponding DC/AC changers ac output voltage and electric current
The output of the DC/AC changers of the output of the DC/AC changers, AC module serial number information and the AC module
Exported by RS485 communication interfaces, the anti-electricity-theft communication unit that calculates of each AC module is periodically collected by RS485 communication interfaces
All of DC Module sequence number and corresponding output power of photovoltaic module information and all of AC module serial number information and phase
The DC/AC changer output power informations answered, all of DC/AC changers output are added and obtain total AC power, will
All of output power of photovoltaic module is added and obtains total dc power, when the difference of total AC power and total dc power is beyond rule
When determining scope, judge electricity filching behavior, the difference is power-steeling quantity, stealing alarm signal, stealing are sent by RS485 now
Amount and AC module serial number information, when judging electricity filching behavior occurs or receives to steal from any one of RS485 communication interfaces
After electric alarm signal, the anti-electricity-theft communication unit that calculates of AC module carries out display lamp and buzzing warning immediately.
Modular construction being adopted currently advanced grid-connected photovoltaic system, the photovoltaic module of each group string data structure is equal more
There is a DC/DC changer that MPPT maximum power point tracking is carried out to which to improve efficiency, can be with using multiple DC/AC changers in parallel
Realize that only one of DC/AC changers are in undercapacity working condition, and other DC/AC changers be in it is fully loaded or
Unloaded operation state, therefore can guarantee that the high efficiency generated electricity by way of merging two or more grid systems.The present invention is directed to advanced grid-connected module elelctrochemical power generation system
System, the DC/DC changers and DC/AC changers of the system generally need the quantity of states such as detection current/voltage in control operation,
Therefore these internal detection limits are used directly for the power calculation of anti-electricity-theft device, particularly calculate photovoltaic module and produce too
Positive energy, therefore while grid-connected modular electric power generation system design is carried out, the design of embedded anti-electricity-theft device can be carried out,
The embedded anti-electricity-theft device together carries out installation and debugging as the auxiliary equipment of grid-connected modular electric power generation system.
Further, described DC Module is anti-electricity-theft calculates in communication unit, the VD and electricity of photovoltaic module
Stream is measured by divider and diverter respectively, or is directly gathered using DC/DC changers.
Further, described AC module it is anti-electricity-theft calculate communication unit in, the ac output voltage of DC/AC changers and
Electric current is measured by voltage transformer summation current transformer respectively, or is directly gathered using DC/AC changers.
Further, when M is more than 1, the grid-connected modular electric power generation system of the distributed photovoltaic is many AC module formula inverters
Electricity generation system；When M is 1, the grid-connected modular electric power generation system of the distributed photovoltaic is centralized inverter electricity generation system, exchanges female
Line is powered to user load, and when the electric energy that M DC/AC changer is produced is more than electric energy needed for user load, unnecessary electric energy send
Enter low-voltage network, when the electric energy that M DC/AC changer is produced is less than electric energy needed for user load, not enough electric energy is by low
Press-fitting electrical network input AC bus, M DC/AC changer provide all or part of reactive power harmonic needed for user load
Electric current.
Further, the instantaneous output of the photovoltaic module is P1=u1(t)i1(t), u in formula1(t) and i1(t) difference
For the VD and current instantaneous value of photovoltaic module, the output of photovoltaic module be by intervals (
For one minute) meansigma methodss of multiple instantaneous outputs that obtain.
Further, when low-voltage network voltage waveform is non-sinusoidal waveform, the output of DC/AC changers includes fundamental wave
Harmonic active power, the output of DC/AC changers according toCalculated, u in formula2(t) and
i2T () is respectively the ac output voltage and current instantaneous value of DC/AC changers, T is low-voltage network voltage cycle.That is DC/
The output of AC changers is the meansigma methodss of multiple output calculating values.
The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic of the present invention can be used for up to 1MW, 7≤N
≤ 168,2≤M≤50, dc bus ceiling voltage 600V, low-voltage network voltage are grid-connected for the distributed photovoltaic of 220V/50Hz
Modular electric power generation system, the anti-electricity-theft maximum photovoltaic component DC output that can measure of communication unit that calculates of DC Module is
70KW, the maximum DC/AC changers output AC power that the anti-electricity-theft calculating communication unit of AC module can be measured is 0.5MW,
The permission difference of total AC power and total dc power can set, the anti-electricity-theft photovoltaic module calculated in communication unit of DC Module
VD and current measurement accuracy be not less than 1%, the anti-electricity-theft DC/AC calculated in communication unit of AC module becomes
The ac output voltage and current measurement accuracy of parallel operation is not less than 1%, and the anti-electricity-theft communication unit that calculates of AC module is stolen every time
Shortest time between electricity judgement was at intervals of 1 minute.
The device have the advantages that as follows：(1) tied using modularity more than currently advanced grid-connected photovoltaic system
Structure is as its DC/DC changer and DC/AC changers need to detect the quantity of states such as current/voltage in control operation therefore first
These the internal detection limits for entering grid-connected photovoltaic system are used directly for the power calculation of anti-electricity-theft device, particularly calculate
The solar energy that photovoltaic module is produced, it is to avoid common grid-connected photovoltaic system anti-electricity-theft device using solar radiation intensity when
Between characteristic curve the facility such as solar radiation sensor that adopts is needed when calculating the solar energy of conversion；(2) due to grid-connected mould
Massing electricity generation system is designed by same manufacturer simultaneously with the anti-electricity-theft device, and anti-electricity-theft device is sent out as grid-connected modularity
The auxiliary device of electric system is packaged together with DC/DC changers and DC/AC changers, and the DC Module of anti-electricity-theft device is prevented
Stealing calculates the anti-electricity-theft calculating communication unit modularized design of communication unit, AC module, therefore has good reliability, is easy to mutual
Change, the characteristics of privacy degrees are high and easy for installation；(3) mutually communicated by RS485, each AC module is anti-electricity-theft to calculate communication
Unit can independently carry out anti-electricity-theft calculating and judgement, therefore the anti-theft electricity technology of the anti-electricity-theft device has reliability and redundancy
Property.
Description of the drawings
Fig. 1 be the present invention schematic diagram, a kind of grid-connected modular electric power generation system, anti-electricity-theft device are given in figure with
And typical grid-connected elelctrochemical power generation system stealing layout.
In figure：101 is that (in figure, abbreviation direct current is anti-electricity-theft for the anti-electricity-theft calculating communication unit of total N number of identical DC Module
Unit), 102 be the anti-electricity-theft calculating communication unit (thief-proof electric unit is referred to as exchanged in figure) of total M identical AC module,
103 it is RS485 connections, 201 be total N number of photovoltaic module, 202 is total N number of DC/DC changers (abbreviation DC/ in figure
DC), 203 be dc bus, 204 be total M DC/AC changers (abbreviation DC/AC in figure), 205 be ac bus, 206
It is user load, 207 be electric energy meter, 208 be low-voltage network, 301 is typical grid-connected elelctrochemical power generation system stealing circuit
The middle commutator by low-voltage network electrical energy transportation to dc bus.
Specific embodiment
The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic of the present invention, as shown in figure 1, it includes
The anti-electricity-theft calculating communication unit 101 of Integer N identical DC Module, M identical AC module of integer are anti-electricity-theft to calculate logical
News unit 102 and RS485 connections 103, the embedded anti-electricity-theft device are sent out according to the grid-connected modularity of corresponding distributed photovoltaic
Electric system is designed and installs.
The grid-connected modular electric power generation system of distributed photovoltaic includes that N number of identical photovoltaic module 201, N number of identical DC/DC become
Parallel operation 201, dc bus 203, M identical DC/AC changer 204, ac bus 205, user load 206, electric energy meter 207
With low-voltage network 208, each group string data structure photovoltaic module 201 by a corresponding DC/DC changer 202 with it is straight
Stream bus 203 is connected, and the direct-flow input end of each DC/AC changer 204 is connected with dc bus 203, each DC/AC changer
204 ac output end is connected with ac bus 205, and user load 206 is connected with ac bus 205, and electric energy meter 207 is connected to
Bidirectional electric energy metering, 205 voltage waveform of ac bus and low-voltage distribution are carried out between ac bus 205 and low-voltage network 208
208 voltage waveform of net is identical, and when M is more than 1, the distributed photovoltaic grid-connected system generates electricity for many AC module formula inverters
System, when M be 1 when, the distributed photovoltaic grid-connected system be centralized inverter electricity generation system, ac bus 205 to
Family load 206 is powered, when the electric energy that M DC/AC changer 204 is produced is more than electric energy needed for user load 206, unnecessary electric energy
Low-voltage network 208 is sent into, it is when the electric energy that M DC/AC changer 204 is produced is less than electric energy needed for user load 206, not enough
Electric energy by 208 input AC bus 205 of low-voltage network, M DC/AC changer 204 provides complete needed for user load 206
Portion or part reactive power harmonic electric current.
The anti-electricity-theft communication unit 101 that calculates of the DC Module of embedded anti-electricity-theft device mainly includes current/voltage collection electricity
Road, microprocessor, four part of warning circuit and RS485 communication interfaces, it is with the grid-connected modular electric power generation system of distributed photovoltaic
DC/DC changers 202 are designed simultaneously, and each DC Module is anti-electricity-theft to calculate communication unit 101 and corresponding single DC/DC conversion
Device 202 constitutes a DC Module being packaged together, and the anti-electricity-theft communication unit 101 that calculates of DC Module is by measuring accordingly
The VD and electric current of photovoltaic module 201, calculates the output of the photovoltaic module 201, the direct current of photovoltaic module 201
Output voltage and electric current can be measured by divider and diverter respectively, it is also possible to directly converted using DC/DC
The VD and current information of the photovoltaic module 201 that device 202 is collected, the output of photovoltaic module 201 and straight
Flow module serial number information is exported by RS485 communication interfaces, and warning circuit is receiving from RS485 communication interfaces any one
Carry out display lamp after individual stealing alarm signal immediately and buzzing is reported to the police.
The anti-electricity-theft communication unit 102 that calculates of the AC module of embedded anti-electricity-theft device mainly includes current/voltage collection electricity
Road, microprocessor, four part of warning circuit and RS485 communication interfaces, it is with the grid-connected modular electric power generation system of distributed photovoltaic
DC/AC changers 204 are designed simultaneously, and each AC module is anti-electricity-theft to calculate communication unit 102 and corresponding single DC/AC conversion
Device 204 constitutes an AC module being packaged together, and the anti-electricity-theft communication unit 102 that calculates of AC module is by measuring accordingly
The ac output voltage and electric current of DC/AC changers 204, calculates the output of DC/AC changers 204, DC/AC changers
204 ac output voltage and electric current can be measured by voltage transformer summation current transformer respectively, it is also possible to directly
The output AC voltage collected using DC/AC changers 204 and current information, AC module serial number information and the exchange mould
The output of the DC/AC changers 204 of block is exported by RS485 communication interfaces, and each AC module is anti-electricity-theft to calculate communication
Unit 102 periodically collects the output work of all of DC Module sequence number and corresponding photovoltaic module 201 by RS485 communication interfaces
The output power information of rate information and all of AC module sequence number and corresponding DC/AC changers 204, by all of DC/
The output of AC changers 204 is added and obtains total AC power, the output of all of photovoltaic module 201 is added and is obtained
Total dc power, when the difference of total AC power and total dc power exceeds prescribed limit, judges electricity filching behavior, the difference
Value is power-steeling quantity, now sends stealing alarm signal, power-steeling quantity and AC module serial number information by RS485, when judgement is sent out
Raw electricity filching behavior is received after any one stealing alarm signal of RS485 communication interfaces, the anti-electricity-theft meter of AC module
Calculating communication unit 102 carries out display lamp and buzzing warning immediately.
The specific design parameter of the present embodiment is：
The embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic of the present invention is used for 1MW, N=168, M=
2nd, the grid-connected module elelctrochemical power generation system of distributed photovoltaic of dc bus ceiling voltage 600V, low-voltage network voltage for 220V/50Hz
System, embedded anti-electricity-theft device DC Module is anti-electricity-theft to be calculated the photovoltaic component DC output that communication unit can measure and is
6KW, the DC/AC changers output AC power that the anti-electricity-theft calculating communication unit of AC module can be measured is 0.5MW, total to exchange
The permission difference of power and total dc power can set, the anti-electricity-theft direct current for calculating the photovoltaic module in communication unit of DC Module
Output voltage and current measurement accuracy are not less than 1%, the DC/AC changers in the anti-electricity-theft calculating communication unit of AC module
Ac output voltage and current measurement accuracy are not less than 1%, and AC module is anti-electricity-theft to calculate each stealing judgement of communication unit
Between time interval be 10 minutes.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
It is to be understood that：Above-described embodiment is the description of the invention, rather than limitation of the present invention, any
Without departing from the innovation and creation in the range of true spirit, each fall within protection scope of the present invention.
Claims (6)
1. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic, including Integer N identical DC Module
Anti-electricity-theft calculating communication unit and the anti-electricity-theft calculating communication unit of M identical AC module of integer, the embedded thief-proof Denso
Put and be designed and install according to the grid-connected modular electric power generation system of corresponding distributed photovoltaic；
The grid-connected modular electric power generation system of described distributed photovoltaic includes Integer N identical photovoltaic module, Integer N identical
DC/DC changers, dc bus, integer M identical DC/AC changer, ac bus, user load, electric energy meter and low pressure
Power distribution network, the photovoltaic module of each group string data structure are connected with dc bus by a corresponding DC/DC changer, each
The direct-flow input end of DC/AC changers is connected with dc bus, ac output end and the ac bus phase of each DC/AC changer
Even, user load is connected with ac bus, and electric energy meter is connected between ac bus and low-voltage network carries out bidirectional electric energy meter
Amount, ac bus voltage waveform are identical with low-voltage network voltage waveform；
Described DC Module it is anti-electricity-theft calculate communication unit include current/voltage Acquisition Circuit, microprocessor, warning circuit and
RS485 communication interfaces, its DC/DC changers design simultaneously with the grid-connected modular electric power generation system of distributed photovoltaic, each direct current
Module is anti-electricity-theft to calculate one DC Module being packaged together of communication unit and corresponding single DC/DC changers composition, directly
The anti-electricity-theft communication unit that calculates of flow module calculates the photovoltaic group by measuring corresponding photovoltaic component DC output voltage and electric current
The output of part, the output and DC Module serial number information of photovoltaic module are exported by RS485 communication interfaces, are reported to the police
Circuit carries out display lamp and buzzing report receiving after any one stealing alarm signal of RS485 communication interfaces immediately
It is alert；
Described AC module it is anti-electricity-theft calculate communication unit include current/voltage Acquisition Circuit, microprocessor, warning circuit and
RS485 communication interfaces, its DC/AC changers design simultaneously with the grid-connected modular electric power generation system of distributed photovoltaic, each exchange
Module is anti-electricity-theft to calculate one AC module being packaged together of communication unit and corresponding single DC/AC changers composition, hands over
The anti-electricity-theft communication unit that calculates of flow module calculates the DC/ by measuring corresponding DC/AC changers ac output voltage and electric current
The output of the DC/AC changers of the output of AC changers, AC module serial number information and the AC module passes through
RS485 communication interfaces are exported, and the anti-electricity-theft communication unit that calculates of each AC module periodically collects all by RS485 communication interfaces
DC Module sequence number and corresponding output power of photovoltaic module information and all of AC module serial number information and corresponding
DC/AC changer output power informations, all of DC/AC changers output are added and obtain total AC power, will be all
Output power of photovoltaic module be added obtain total dc power, when total AC power and total dc power difference beyond regulation model
When enclosing, judge electricity filching behavior, the difference is power-steeling quantity, now by RS485 send stealing alarm signal, power-steeling quantity and
AC module serial number information, when judging electricity filching behavior or receive any one stealing report from RS485 communication interfaces
After alert signal, the anti-electricity-theft communication unit that calculates of AC module carries out display lamp and buzzing warning immediately.
2. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic according to claim 1, its feature
It is,
Described DC Module is anti-electricity-theft to be calculated in communication unit, and the VD and electric current of photovoltaic module is respectively by straight
Flow point depressor and diverter are measured, or are directly gathered using DC/DC changers.
3. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic according to claim 1, its feature
It is,
Described AC module is anti-electricity-theft to be calculated in communication unit, and the ac output voltage and electric current of DC/AC changers lead to respectively
Overvoltage transformer summation current transformer is measured, or is directly gathered using DC/AC changers.
4. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic according to claim 1, its feature
It is,
When M is more than 1, the grid-connected modular electric power generation system of the distributed photovoltaic is many AC module formula inverter electricity generation systems；Work as M
For 1 when, the grid-connected modular electric power generation system of the distributed photovoltaic be centralized inverter electricity generation system, ac bus are to user load
Power supply, when the electric energy that M DC/AC changer is produced is more than electric energy needed for user load, unnecessary electric energy sends into low-voltage network,
When the electric energy that M DC/AC changer is produced is less than electric energy needed for user load, not enough electric energy is handed over by low-voltage network input
Stream bus, M DC/AC changer provide all or part of reactive power harmonic electric current needed for user load.
5. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic according to claim 1, its feature
It is,
The instantaneous output of the photovoltaic module is P1=u1(t)i1(t), u in formula1(t) and i1T () is respectively photovoltaic module
VD and current instantaneous value, the output of photovoltaic module are the multiple instantaneous output obtained by intervals
The meansigma methodss of power.
6. the embedded anti-electricity-theft device of the grid-connected modular electric power generation system of distributed photovoltaic according to claim 1, its feature
It is,
When low-voltage network voltage waveform is non-sinusoidal waveform, the output of DC/AC changers is active comprising fundamental wave harmonic
Power, the output of DC/AC changers according toCalculated, u in formula2(t) and i2T () is respectively
The ac output voltage and current instantaneous value of DC/AC changers, T are low-voltage network voltage cycle.
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| CN113341216A (en) * | 2021-06-10 | 2021-09-03 | 国网安徽省电力有限公司培训中心 | Anti-electricity-stealing method for distributed photovoltaic power generation system |
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| CN103364631A (en) * | 2013-07-26 | 2013-10-23 | 国家电网公司 | High-voltage user photovoltaic power generation electric energy metering system and method thereof |
| CN103558432A (en) * | 2013-11-05 | 2014-02-05 | 国家电网公司 | High-voltage direct connection type electricity stealing detection device |
| KR101419814B1 (en) * | 2014-04-04 | 2014-08-14 | (주)에이치에스쏠라에너지 | Smart connection board of solar energy generation system and measuring method of power generation efficiency of inverter using it |
| CN204906306U (en) * | 2015-09-22 | 2015-12-23 | 国网浙江省电力公司电力科学研究院 | Embedded anti -electricity -theft device of distributing type grid -connected PV modularization power generation system |
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Address after: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY LIMITED ELECTRIC POWER Research Institute Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID ZHEJIANG ELECTRIC POWER Co. Patentee before: State Grid Corporation of China Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER Co. |
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Effective date of registration: 20220317 Address after: 311100 Building 5, 138 Yunlian Road, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Marketing service center of State Grid Zhejiang Electric Power Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY LIMITED ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. |