CN103487646A - Regional photovoltaic generated energy monitoring device and method - Google Patents
Regional photovoltaic generated energy monitoring device and method Download PDFInfo
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Abstract
The invention discloses a regional photovoltaic generated energy monitoring device and method. Data of the temperature and the illumination intensity inside regions with similar weather geographical environments and output voltages and currents of battery panels of all photovoltaic grid connection points are sampled through the GPRS wireless transmission technology. The daily generated energy limiting value of each photovoltaic grid connection point is calculated according to the sampled data and the data of photovoltaic inverters. The daily generated energy limiting values obtained through analysis and calculation are compared with data of practical strategic pass meters. Information of the grid connection points with large deviation is provided for a photovoltaic supervision department. According to the regional photovoltaic generate energy monitoring device and method, the output power of photovoltaic power stations inside the regions with the similar geographical environments can be accurately estimated, bases are provided for verifying true generated energy, photovoltaic electricity stealing behaviors are fundamentally prevented, and economic losses of the country and the power supply department are avoided.
Description
Technical field
The present invention relates to power equipment and power supply technique field, refer more particularly to a kind of zonal photovoltaic generation quantity monitoring method and device thereof.
Background technology
In recent years, in order to accelerate, photovoltaic industry makes the transition, the superfluous production capacity of dissolving, and country puts into effect in succession to the distributed photovoltaic power generation support policy.Subsidy and self generating amount that distributed photovoltaic power generation is enjoyed are closely related, at present, adopt the distributed photovoltaic power generation of 380 volts of accesses only to need to upload information about power to grid company, lack effective subsidiary information, to stay leak for the subsidy of distributed power generation, make part lack sincere user and take illegal means to obtain more subsidy, upset the normal development of distributed photovoltaic power generation.
Different from traditional generation mode, photovoltaic generation is based on the new-generation mode of Power Electronic Technique, and special generation mode and the subsidy policy based on it, also expedite the emergence of the poly-talented electricity filching means that some illegally obtain subsidy.How scientificlly and effectively containing the negative issue that the new forms of energy development brings, avoid national economic loss, is that current electric power enterprise has one of problem to be solved.
Summary of the invention
The monitoring device and the method thereof that the purpose of this invention is to provide a kind of regional photovoltaic power generation quantity, can accurately estimate photovoltaic plant output power in zone like geographical environmental facies, the scientific evidence of user's electricity filching behavior is provided to power grid enterprises, solves the difficult problem of evidence obtaining in stealing inspection process.
Purpose of the present invention is achieved through the following technical solutions:
The monitoring device of regional photovoltaic power generation quantity, it comprises and being arranged on the photovoltaic array series arm, and for the wireless current collector of measuring photovoltaic cell outlet size of current, be arranged on the photovoltaic DC-to-AC converter direct-flow input end and for the wireless voltage collector of measuring photovoltaic cell terminal voltage size, wireless temperature acquisition machine, wireless intensity of illumination collector with to signal analysis terminal that in zone, all wireless collection signals carry out statistical study; On each grid-connected point, wireless current collector and wireless voltage collector all are installed, described wireless temperature acquisition machine and wireless intensity of illumination collector are arranged near the monitoring point on grid-connected, and described wireless current collector, wireless voltage collector, wireless temperature acquisition machine and wireless intensity of illumination collector all communicate by GPRS passage and signal analysis terminal.
Further, it is benchmark that described wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless irradiation intensity collector and wireless signal collection terminal be take the time that GPRS provides, and under unified clock, is sampled.
Further, the daily generation W of the photovoltaic cell on described grid-connected point
ccomputing formula be:
W
c=∑N·U·I·T
s；
Actual and daily generation W site on grid-connected point is:
W=W
c·η；
Wherein, the parallel branch number that N is photovoltaic battery array, U is the photovoltaic DC-to-AC converter DC bus-bar voltage, the electric current of the series arm that I is photovoltaic array, T
sfor the sampling period of clock, the efficiency that η is photovoltaic DC-to-AC converter are provided based on GPRS.
As preferably, described wireless current collector comprises current Hall element, AD modular converter and GPRS sending module, described current Hall element is connected with the GPRS sending module by the AD modular converter, and the sampled value of described current Hall element collection transfers to the signal analysis terminal by the GPRS sending module.
As preferably, described wireless voltage collector comprises voltage Hall element, AD modular converter and GPRS sending module structure, described voltage Hall element is connected with the GPRS sending module by the AD modular converter, and the sampled value of described voltage Hall element collection transfers to the signal analysis terminal by the GPRS sending module.
As preferably, described wireless temperature acquisition machine comprises temperature sensor, AD modular converter and GPRS sending module, described temperature sensor is connected with the GPRS sending module by the AD modular converter, and the sampled value of described temperature sensor collection is also to the signal analysis terminal by the GPRS channel transfer;
As preferably, described wireless intensity of illumination collector comprises photoresistance, AD modular converter and GPRS sending module, described photoresistance is connected with the GPRS sending module by the AD modular converter, and the sampled value of described photoresistance collection is also to the signal analysis terminal by the GPRS channel transfer.
A kind of monitoring method of utilizing said apparatus to carry out regional photovoltaic power generation quantity, its method step is as follows:
(1) wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless intensity of illumination collector are installed on grid-connected point; Wireless current collector is arranged in series arm exit at each grid-connected some photovoltaic array, and carries out unified numbering, for measuring the size of current of photovoltaic cell outlet; Arrange wireless voltage collector on each photovoltaic DC-to-AC converter direct-flow input end mouth, and carry out unified numbering, to measure the size of photovoltaic cell terminal voltage; Wireless temperature acquisition machine, wireless intensity of illumination collector are installed near grid-connected monitoring point, and are carried out Unified number;
(2) collection of wireless signal; It is benchmark that wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless intensity of illumination collector be take the time that GPRS provides, under unified clock, sampled, sampled value and by the GPRS channel transfer to the signal analysis terminal;
(3) calculate each grid-connected some daily generation; The signal analysis terminal is carried out statistical study to all wireless collection signals in zone, according to the sampled data of each and site, goes out the limit value of the daily generation of photovoltaic cell in conjunction with temperature, intensity of illumination information comprehensive analysis; The limit value W of the daily generation of photovoltaic cell
ccomputing formula is:
W
c=∑N·U·I·T
s
Wherein, the parallel branch number that N is photovoltaic battery array, U is the photovoltaic DC-to-AC converter DC bus-bar voltage, the electric current of the series arm that I is photovoltaic array, T
sfor the sampling period of clock is provided based on GPRS;
(4) each grid-connected some operating condition assessment and the output of early warning result; The signal analysis terminal, according to the restriction of the daily generation of the grid-connected point of step (3) gained, is contrasted with actual critical point meter data, for abnormal higher data output alarm information.
Further, in described step (4), the daily generation W of actual grid-connected point is:
W=W
c·η；
Wherein, the efficiency that η is photovoltaic DC-to-AC converter.
The present invention only needs to configure a wireless electric current by the grid-connected point general and adopts device and a wireless voltage to adopt device, there is cost low, the simple advantage of constructing, only need to configure monitoring analysis and the early warning work that a signal analysis terminal can complete all grid-connected points at meteorological geographical environment in identical zone, easy to maintenance, can accurately estimate photovoltaic plant output power in zone like geographical environmental facies, provide foundation for examining true generated energy, the scientific evidence of user's electricity filching behavior is provided to power grid enterprises, fundamentally prevented the photovoltaic electricity filching behavior, avoided the economic loss of country and power supply department.
The accompanying drawing explanation
Fig. 1 is that photovoltaic power generation quantity monitoring device of the present invention forms structural drawing;
Fig. 2 is that the wireless current collector of the present invention is placed schematic diagram;
Fig. 3 is that the wireless voltage collector of the present invention is placed schematic diagram;
The algorithm flow chart that Fig. 4 is signal analysis terminal of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Referring to Fig. 1 to Fig. 4, the present embodiment provides a kind of zonal photovoltaic power generation quantity monitoring device and detection method thereof, it utilizes temperature, intensity of illumination data in the GPRS Radio Transmission Technology zone similar to meteorological geographical environment, and cell panel output voltage, the electric current of all grid-connected points sampled, the daily generation limit value according to the efficiency data of sampled data and photovoltaic DC-to-AC converter to each grid-connected point is calculated.The data of the daily generation limit value that analytical calculation is obtained and actual critical point gauging table are contrasted, and will depart from more grid-connected dot information and offer photovoltaic supervision department.
In the present embodiment, utilize current Hall element, AD modular converter, GPRS sending module to be configured to wireless current collector, sampled value is passed through the GPRS channel transfer to the signal analysis terminal; Utilize voltage Hall element, AD modular converter, GPRS sending module to be configured to wireless voltage collector, sampled value is passed through the GPRS channel transfer equally to the signal analysis terminal; Utilize temperature sensor, AD modular converter, GPRS sending module to be configured to wireless temperature acquisition machine, sampled value is also to the signal analysis terminal by the GPRS channel transfer; Utilize photoresistance, AD modular converter, GPRS sending module to be configured to wireless intensity of illumination collector, sampled value is also to the signal analysis terminal by the GPRS channel transfer.
The concrete detection method of the present embodiment is: (1) all installs wireless current collector and wireless voltage collector at each grid-connected point.Arrange that in the series arm outlet of photovoltaic array the wireless current collector of wireless current collector is installed on the series arm of each grid-connected some photovoltaic array, and carry out unified numbering, its modes of emplacement as shown in Figure 2, to measure the size of current of photovoltaic cell outlet.Wireless voltage collector is installed on the direct-flow input end of photovoltaic DC-to-AC converter, and carries out unified numbering, its modes of emplacement as shown in Figure 3, to measure the size of photovoltaic cell terminal voltage.Wireless temperature acquisition machine, wireless intensity of illumination collector additionally are installed in representative monitoring point, are also carried out Unified number.
(2) collection of wireless signal; It is benchmark that wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless irradiation intensity collector and wireless signal collection terminal be take the time that GPRS provides, and under unified clock, is sampled;
(3) calculate each grid-connected some daily generation; The signal analysis terminal is carried out statistical study to all wireless collection signals in zone, according to the sampled data of each and site, goes out the limit value of the daily generation of photovoltaic cell in conjunction with temperature, intensity of illumination information comprehensive analysis; The limit value W of the daily generation of photovoltaic cell
ccomputing formula is:
W
c=∑N·U·I·T
s
Wherein, the parallel branch number that N is photovoltaic battery array, U is the photovoltaic DC-to-AC converter DC bus-bar voltage, the electric current of the series arm that I is photovoltaic array, T
sfor the sampling period of clock is provided based on GPRS.
(4) each grid-connected some operating condition assessment and the output of early warning result; The efficiency calculation of the voltage that each grid-connected some operating condition assessment signal analysis terminal obtains according to sampling, electric current, photovoltaic DC-to-AC converter goes out the daily generation limit value of all grid-connected points in zone, with actual critical point meter data, contrasted, the also site higher for the daily generation data exception sends warning message to photovoltaic administrative authority.
And the actual electromotive power output of site is also relevant with the efficiency eta of photovoltaic DC-to-AC converter, therefore, daily generation W actual and site is:
W=W
c·η。
Signal analysis terminal of the present invention is carried out statistical study to all wireless collection signals in zone, according to the sampled data of each and site, in conjunction with information comprehensive analysis such as temperature, intensities of illumination, goes out and the limit value of the daily generation of site.On this basis, the data of analysis result and each critical point, site gauging table are contrasted, for the daily generation data exception, higher and site sends warning message to photovoltaic administrative authority.
The present invention only needs to configure a wireless electric current at general grid-connected point and adopts device and a wireless voltage to adopt device, has a cost low, the simple advantage of constructing.Only need to configure monitoring analysis and the early warning work that a signal analysis terminal can complete all grid-connected points at meteorological geographical environment in identical zone, easy to maintenance, it provides foundation for examining true generated energy, fundamentally prevent the photovoltaic electricity filching behavior, avoided the economic loss of country and power supply department.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (9)
1. the monitoring device of a regional photovoltaic power generation quantity, it is characterized in that, it comprises and being arranged on the photovoltaic array series arm, and for the wireless current collector of measuring photovoltaic cell outlet size of current, be arranged on the photovoltaic DC-to-AC converter direct-flow input end and for the wireless voltage collector of measuring photovoltaic cell terminal voltage size, wireless temperature acquisition machine, wireless intensity of illumination collector with to signal analysis terminal that in zone, all wireless collection signals carry out statistical study; On each grid-connected point, wireless current collector and wireless voltage collector all are installed, described wireless temperature acquisition machine and wireless intensity of illumination collector are arranged near the monitoring point on grid-connected, and described wireless current collector, wireless voltage collector, wireless temperature acquisition machine and wireless intensity of illumination collector all communicate by GPRS passage and signal analysis terminal.
2. the monitoring device of regional photovoltaic power generation quantity according to claim 1, it is characterized in that, it is benchmark that described wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless irradiation intensity collector and wireless signal collection terminal be take the time that GPRS provides, and under unified clock, is sampled.
3. the monitoring device of regional photovoltaic power generation quantity according to claim 1, is characterized in that, the daily generation W of the photovoltaic cell on described grid-connected point
ccomputing formula be:
W
c=∑N·U·I·T
s；
Actual and daily generation W site on grid-connected point is:
W=W
c·η；
Wherein, the parallel branch number that N is photovoltaic battery array, U is the photovoltaic DC-to-AC converter DC bus-bar voltage, the electric current of the series arm that I is photovoltaic array, T
sfor the sampling period of clock, the efficiency that η is photovoltaic DC-to-AC converter are provided based on GPRS.
4. the monitoring device of regional photovoltaic power generation quantity according to claim 1, it is characterized in that, described wireless current collector comprises current Hall element, AD modular converter and GPRS sending module, described current Hall element is connected with the GPRS sending module by the AD modular converter, and the sampled value of described current Hall element collection transfers to the signal analysis terminal by the GPRS sending module.
5. the monitoring device of regional photovoltaic power generation quantity according to claim 1, it is characterized in that, described wireless voltage collector comprises voltage Hall element, AD modular converter and GPRS sending module structure, described voltage Hall element is connected with the GPRS sending module by the AD modular converter, and the sampled value of described voltage Hall element collection transfers to the signal analysis terminal by the GPRS sending module.
6. the monitoring device of regional photovoltaic power generation quantity according to claim 1, it is characterized in that, described wireless temperature acquisition machine comprises temperature sensor, AD modular converter and GPRS sending module, described temperature sensor is connected with the GPRS sending module by the AD modular converter, and the sampled value of described temperature sensor collection is also to the signal analysis terminal by the GPRS channel transfer.
7. the monitoring device of regional photovoltaic power generation quantity according to claim 1, it is characterized in that, described wireless intensity of illumination collector comprises photoresistance, AD modular converter and GPRS sending module, described photoresistance is connected with the GPRS sending module by the AD modular converter, and the sampled value of described photoresistance collection is also to the signal analysis terminal by the GPRS channel transfer.
8. the monitoring method of a regional photovoltaic power generation quantity, is characterized in that, its method step is as follows:
(1) wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless intensity of illumination collector are installed on grid-connected point; Wireless current collector is arranged in series arm exit at each grid-connected some photovoltaic array, and carries out unified numbering, for measuring the size of current of photovoltaic cell outlet; Arrange wireless voltage collector on each photovoltaic DC-to-AC converter direct-flow input end mouth, and carry out unified numbering, to measure the size of photovoltaic cell terminal voltage; Wireless temperature acquisition machine, wireless intensity of illumination collector are installed near grid-connected monitoring point, and are carried out Unified number;
(2) collection of wireless signal; It is benchmark that wireless current collector, wireless voltage collector, wireless temperature acquisition machine, wireless intensity of illumination collector be take the time that GPRS provides, under unified clock, sampled, sampled value and by the GPRS channel transfer to the signal analysis terminal;
(3) calculate each grid-connected some daily generation; The signal analysis terminal is carried out statistical study to all wireless collection signals in zone, according to the sampled data of each and site, goes out the limit value of the daily generation of photovoltaic cell in conjunction with temperature, intensity of illumination information comprehensive analysis; The limit value W of the daily generation of photovoltaic cell
ccomputing formula is:
W
c=∑N·U·I·T
s
Wherein, the parallel branch number that N is photovoltaic battery array, U is the photovoltaic DC-to-AC converter DC bus-bar voltage, the electric current of the series arm that I is photovoltaic array, T
sfor the sampling period of clock is provided based on GPRS;
(4) each grid-connected some operating condition assessment and the output of early warning result; The signal analysis terminal, according to the restriction of the daily generation of the grid-connected point of step (3) gained, is contrasted with actual critical point meter data, for abnormal higher data output alarm information.
9. the monitoring method of regional photovoltaic power generation quantity according to claim 8, is characterized in that, in described step (4), the daily generation W of actual grid-connected point is:
W=W
c·η；
Wherein, the efficiency that η is photovoltaic DC-to-AC converter.
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| CN104348413A (en) * | 2014-10-13 | 2015-02-11 | 东南大学 | Data-analysis-based adaptive photovoltaic electricity stealing prevention method |
| CN104979898A (en) * | 2014-04-04 | 2015-10-14 | 国家电网公司 | Electricity larceny prevention monitoring method, electricity larceny prevention monitoring terminal, electricity larceny prevention monitoring master station and electricity larceny prevention monitoring system |
| CN105139275A (en) * | 2015-08-17 | 2015-12-09 | 国家电网公司 | Method for establishing distributed photovoltaic power stealing cost benefit evaluation model |
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| CN111371899A (en) * | 2020-03-13 | 2020-07-03 | 山东三电新能源技术有限公司 | Data acquisition method and system suitable for large-scale distributed photovoltaic |
| CN111505408A (en) * | 2020-03-19 | 2020-08-07 | 尚特杰电力科技有限公司 | Detection system and method for photovoltaic inverter |
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| CN104300874A (en) * | 2014-09-09 | 2015-01-21 | 欧贝黎新能源科技股份有限公司 | Grid-connected solar photovoltaic power generation system |
| CN104348413A (en) * | 2014-10-13 | 2015-02-11 | 东南大学 | Data-analysis-based adaptive photovoltaic electricity stealing prevention method |
| CN105139275B (en) * | 2015-08-17 | 2018-09-11 | 国家电网公司 | A method of establishing distributed photovoltaic stealing Cost benefit assessment model |
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| CN106033910A (en) * | 2016-08-04 | 2016-10-19 | 珠海市金锐电力科技有限公司 | Outdoor-device solar-power-supply power management device and method |
| CN107544049B (en) * | 2017-08-01 | 2020-05-19 | 中国科学院电工研究所 | Method for correcting power station data deviation according to hand-reading data of grid-connected point gateway meter |
| CN107544049A (en) * | 2017-08-01 | 2018-01-05 | 中国科学院电工研究所 | Method according to grid entry point Source of Gateway Meter write by hand data correction power station data deviation |
| CN108089509A (en) * | 2017-12-22 | 2018-05-29 | 苏州正易鑫新能源科技有限公司 | A kind of photo-voltaic power generation station long-distance management device and system |
| CN108039773A (en) * | 2017-12-22 | 2018-05-15 | 苏州正易鑫新能源科技有限公司 | A kind of long-range efficiency calculation apparatus and system of photo-voltaic power generation station |
| CN108039773B (en) * | 2017-12-22 | 2022-01-14 | 苏州易助能源管理有限公司 | Photovoltaic power station remote efficiency calculation device and system |
| CN109391231A (en) * | 2018-12-05 | 2019-02-26 | 应硕檬 | A kind of resident's roof photovoltaic power station exception checking method |
| CN111245096A (en) * | 2020-01-20 | 2020-06-05 | 山东三电新能源技术有限公司 | Distributed photovoltaic data acquisition terminal, system and data processing method |
| CN111371899A (en) * | 2020-03-13 | 2020-07-03 | 山东三电新能源技术有限公司 | Data acquisition method and system suitable for large-scale distributed photovoltaic |
| CN111371899B (en) * | 2020-03-13 | 2022-07-12 | 山东三电新能源技术有限公司 | Data acquisition method and system suitable for large-scale distributed photovoltaic |
| CN111505408A (en) * | 2020-03-19 | 2020-08-07 | 尚特杰电力科技有限公司 | Detection system and method for photovoltaic inverter |
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Application publication date: 20140101 |