CN104184411A - Electricity larceny prevention monitoring apparatus and method of distributed photovoltaic power generation system - Google Patents
Electricity larceny prevention monitoring apparatus and method of distributed photovoltaic power generation system Download PDFInfo
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- CN104184411A CN104184411A CN201410384133.3A CN201410384133A CN104184411A CN 104184411 A CN104184411 A CN 104184411A CN 201410384133 A CN201410384133 A CN 201410384133A CN 104184411 A CN104184411 A CN 104184411A
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Abstract
The invention discloses an electricity larceny prevention monitoring apparatus and method of a distributed photovoltaic power generation system. The apparatus comprises a sunlight irradiation intensity monitoring unit, a core data processing unit and a feed network monitoring unit. The core data processing unit calculates convertible solar energy according to a time characteristic curve of sunlight irradiation intensity output by the sunlight irradiation intensity monitoring unit; the core data processing unit, according to time characteristic feed network currents, voltages, power and a time characteristic curve of electric energy, calculating to obtain the electric energy output from the photovoltaic power generation system; the core data processing unit makes a comparison between the time characteristics of parameters outputted by the two units in terms of consistency; if a deviation is smaller than a set value, it is determined that the electric energy output from the photovoltaic power generation system comes from the solar energy converted by a photovoltaic battery pack; and if the deviation of the consistency of the two is greater than the set value, electricity larceny alarm information is output. According to the invention, automatic monitoring, identification and early warning of potential electricity larceny behaviors of users of a distributed photovoltaic grid-connected power generation system can be realized at an early stage.
Description
Technical field
The present invention relates to the distributed photovoltaic anti-electric theft monitoring field that generates electricity by way of merging two or more grid systems, relate in particular to a kind of anti-electricity-theft recognition device and method that is applicable to distributed photovoltaic grid-connected system.
Background technology
Electricity filching behavior gratis obtains electric energy from public electric wire net, the long-standing a kind of phenomenons in countries in the world, country, enterprise and society are brought to great loss and negative effect, various types of stealing sides gimmick is variation day by day, and the system of opposing electricity-stealing accordingly and technological means be therefore and constantly upgrading also.
Due to the progressively application of distributed photovoltaic power generation system, there is obvious variation with respect to identity and the role of grid company in conventional electric power user.The relative grid company of terminal use such as original individual, family, industry, business are the simple electric energy buyeies, and the relative terminal use of grid company is the simple electric energy seller; When investing, terminal use installs after distributed photovoltaic grid-connected system becomes the owner of this type systematic, its relative grid company may be to buy electricity side, also may be to sell electricity side, this depends on the concrete conditions such as user's system installed capacity, personal power consumption and changes.
Current various countries, for helping and encourage the sustainable development of photovoltaic industry and the application of promotion distributed photovoltaic power generation system, all release the subsidy policy that intensity is different, comprise the rate for incorporation into the power network subsidy to photovoltaic generation.It is larger that the rate for incorporation into the power network of general photovoltaic generation is subsidized dynamics in earlier stage, successively decrease with the time of generating electricity by way of merging two or more grid systems, the great number rate for incorporation into the power network subsidy in early stage may cause sale of electricity electricity price and buy the price inversion phenomenon of electricity price, that is: the actual electricity price of selling of the user after subsidy is higher than buying electricity price, this situation also make part unprincipled fellow can walk around photovoltaic battery array from the direct power taking of electrical network through photovoltaic combining inverter again feed-in electrical network to obtain the illegal electricity price subsidy of great number income.
How to know whether distributed photovoltaic grid-connected system, after grid-connected, electricity filching behavior occurred, and the electric weight of stealing, do not have in the prior art corresponding technical solution scheme and method, therefore research and develop a kind of apparatus and method that the electricity filching behavior of distributed photovoltaic power generation system is monitored extremely urgent.
Patent of the present invention is according to terrestrial solar radiation intensity real time data, photovoltaic cell is installed total capacity, photovoltaic cell voltage, current data, actual power generation is calculated in successively classification, whether the deviation range of more every one-level calculated value and measured value transfinites, and can identify thus distributed photovoltaic grid-connected system user and whether have electricity filching behavior, if deviation transfinites, supervisory control system will be sent warning information, and prompting staff carries out factual survey evidence obtaining to user scene.
Explanation of nouns:
MCU: be the abbreviation of English " Micro Control Unit ", the Chinese meaning is " microcontroller ";
ADC: be the abbreviation of English " Analog to Digital Converter ", the Chinese meaning is " analog/digital converter ";
Vgrid: line voltage;
Io: feedback net electric current;
Peripheral Circuits: peripheral circuit;
Intensity of Solar Radiation: real-time terrestrial solar radiation intensity;
Tambient: ambient temperature;
Vbat: the voltage in accumulate pond;
Ibat: storage battery current.
Summary of the invention
The technical problem to be solved in the present invention is to avoid monitoring when generating electricity by way of merging two or more grid systems, whether stealing row to occur less than distributed photovoltaic power generation system and the weak point of the electric weight stolen and designed a kind of electricity stealing-prevention monitoring device and method of distributed photovoltaic power generation system, to identify distributed photovoltaic power generation system, whether there is electricity filching behavior and power-steeling quantity, to warning information can be sent to process in time after electricity filching behavior occurs.
A kind of electricity stealing-prevention monitoring device of distributed photovoltaic power generation system comprises terrestrial solar radiation intensity monitoring unit for monitoring of environmental intensity of solar radiation, for the core data processing unit controlling and calculate with for monitoring the feedback net monitoring means of photovoltaic combining inverter feedback net electric current, power, electric flux; Described terrestrial solar radiation intensity monitoring unit and described feedback net monitoring means are all electrically connected to described core data processing unit; Described feedback net monitoring means is electrically connected to distributed photovoltaic power generation system in Node B; The time response curve of described terrestrial solar radiation intensity monitoring unit output terrestrial solar radiation intensity; Described core data processing unit is according to the convertible solar energy of time response curve calculation of terrestrial solar radiation intensity; The time response curve of described feedback net monitoring means output feedback net electric current, voltage, power, electric flux; Described core data processing unit obtains from the electric flux of photovoltaic generating system output according to the time response curve calculation of feedback net electric current, voltage, power, electric flux; Described core data processing unit carries out comparison of coherence to the time response curve of terrestrial solar radiation intensity and the time response curve of feedback net electric current, voltage, power, electric flux; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at consistency deviation, export stealing warning message.
Described electricity stealing-prevention monitoring device also comprises that described photovoltaic cell group string monitoring means one end is electrically connected to core data processing unit for monitoring the photovoltaic cell group string monitoring means of photovoltaic cell group string output voltage, electric current; The output of the described photovoltaic cell group string monitoring means other end and photovoltaic cell group string, node C is electrically connected to; The output voltage of described photovoltaic cell group string monitoring means output photovoltaic cell group string, the time response curve of electric current; Described core data processing unit carries out comparison of coherence to voltage, the current time characteristic curve of the time response curve of terrestrial solar radiation intensity and photovoltaic cell group string; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of photovoltaic cell group string conversion performance or damage.
Described electricity stealing-prevention monitoring device also comprises the ambient temperature monitoring means for monitoring of environmental temperature, and described ambient temperature monitoring means is electrically connected to core data processing unit; The time response curve of described ambient temperature monitoring means output environment temperature; First described core data processing unit carries out comparison of coherence by the time response curve of the time response curve of ambient temperature and described terrestrial solar radiation intensity monitoring unit output terrestrial solar radiation intensity; Described core data processing unit also carries out comparison of coherence by the voltage of the time response curve of ambient temperature and photovoltaic cell group string, current time characteristic curve consistency; If the deviation of above-mentioned twice contrast is all less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If the deviation of above-mentioned twice contrast has any one to be greater than set point, export stealing warning message or be judged as the decline of photovoltaic cell group string conversion performance or damage.
Described electricity stealing-prevention monitoring device also comprises that one end of described Storage Battery Monitor Unit is electrically connected to core data processing unit for monitoring the Storage Battery Monitor Unit of battery-operated state; The output of the described Storage Battery Monitor Unit other end and storage battery, node D is electrically connected to; The time response curve of described Storage Battery Monitor Unit output battery tension and electric current; Described core data processing unit is according to the time response curve of battery tension and electric current, calculate the electric flux of exporting from storage battery in a period of time, and carry out comparing calculation with the electric flux consistency of exporting from photovoltaic generating system, if the electric flux of photovoltaic generating system output and the electric flux high conformity from storage battery output, be that both deviations are less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at deviation, export stealing warning message or be judged as the decline of storage battery conversion performance or damage.
Described electricity stealing-prevention monitoring device also comprises for the network element of same Surveillance center contact with for man-machine communication's man-machine interaction unit; Described network element and man-machine interaction unit are all electrically connected to core data processing unit; Described network element comprises serial communication interface or wireless communication module, realizes and communicating by letter with Surveillance center; Described man-machine interaction unit comprises for the button of manual parameter typing and setting and for equipment operational factor and running status demonstration LCD display module and LED light, realizes on-the-spot man-machine interaction.
An anti-electricity-theft monitoring method for distributed photovoltaic power generation system, comprises the following steps:
A. in the working region of photovoltaic cell group string, terrestrial solar radiation intensity monitoring unit is set, obtains intensity of solar radiation information, the time response curve of output terrestrial solar radiation intensity; For the core data processing unit controlling and calculate, according to the time response curve calculation of terrestrial solar radiation intensity, go out the convertible solar energy of photovoltaic generating system;
B. in photovoltaic combining inverter output, node A arranges feedback net monitoring means, the time response curve of the electric current of feedback net monitoring means monitoring photovoltaic combining inverter output, voltage, power, electric flux; The time response curve of described feedback net monitoring means output feedback net electric current, voltage, power, electric flux; Described core data processing unit obtains from the electric flux of photovoltaic generating system output according to the time response curve calculation of feedback net electric current, voltage, power, electric flux;
The time response curve of c, the electric current of the time response curve of the terrestrial solar radiation intensity obtaining from terrestrial solar radiation intensity monitoring unit and described photovoltaic combining inverter being exported for the core data processing unit controlling and calculate, voltage, power, electric flux carries out comparison of coherence; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at consistency deviation, export stealing warning message.
Described anti-electricity-theft monitoring method also comprises step after described step c:
D. in photovoltaic cell group string output, be the photovoltaic cell group string monitoring means that node C is provided for monitoring photovoltaic cell group string output voltage, current information, the output voltage of described photovoltaic cell group string monitoring means output photovoltaic cell group string, the time response curve of electric current;
E. described core data processing unit carries out comparison of coherence by voltage, the current time characteristic curve of the photovoltaic cell group string of the terrestrial solar radiation strength time characteristic curve of described terrestrial solar radiation intensity monitoring unit output and the output of described photovoltaic cell group string monitoring means; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of photovoltaic cell group string conversion performance or damage.
Described anti-electricity-theft monitoring method, also comprises step after described step c:
F. in the working region of photovoltaic cell group string, be provided for the ambient temperature monitoring means of monitoring of environmental temperature, the time response curve of described ambient temperature monitoring means output environment temperature;
G. first described core data processing unit carries out comparison of coherence by the time response curve of the time response curve of ambient temperature and described terrestrial solar radiation intensity monitoring unit output terrestrial solar radiation intensity; Described core data processing unit also carries out comparison of coherence by the voltage of the time response curve of ambient temperature and photovoltaic cell group string, current time characteristic curve consistency; If the deviation of above-mentioned twice contrast is all less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If the deviation of above-mentioned twice contrast has any one to be greater than set point, export stealing warning message or be judged as the decline of photovoltaic cell group string conversion performance or damage.
Described anti-electricity-theft monitoring method also comprises step after described step c:
H. in the output of storage battery, node D is provided for monitoring the Storage Battery Monitor Unit of battery-operated state, the time response curve of described Storage Battery Monitor Unit output battery tension and electric current;
I. described core data processing unit is according to the time response curve of battery tension and electric current, calculates in a period of time the electric flux from storage battery output, and with this period in from the electric flux consistency of photovoltaic generating system output, carry out comparing calculation; If the electric flux of photovoltaic generating system output and the electric flux high conformity from storage battery output, both deviations are less than set point, are judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of storage battery conversion performance or damage.
Described anti-electricity-theft monitoring method also comprises step after described step c:
J. by the man-machine interaction unit for man-machine communication, obtain operational factor and running state information, and accept monitoring parameter setting;
K. by the network element for the contact of same Surveillance center, result and the warning message of the contrast of the time response curve of the various physical quantitys that monitor, each physical quantity time response are sent to Surveillance center, and accept the control command sent from Surveillance center.
Compared with the existing technology, the invention has the beneficial effects as follows: 1. the terrestrial solar radiation intensity monitoring unit that the present invention arranges by the working region at photovoltaic cell group string obtains the time response curve of output terrestrial solar radiation intensity and calculates and obtain the convertible solar energy of distributed photovoltaic power generation system with this; Therefore can obtain relatively accurate convertible solar energy information; And contrast judgement according to the electric flux of convertible solar energy data and actual this distributed photovoltaic power generation system output, judge whether accurately to occur electricity filching behavior, and the electric weight reference data of stealing.2. the present invention is also by the time response curve of the energy output of other nodes in monitoring distributed photovoltaic power generation system, as the output node of photovoltaic cell group string and storage battery output node, the time response curve comparison of the electric flux of the energy time characteristic curve of exporting by these nodes and the output of distributed photovoltaic power generation system; With this, provide multiple spot and multi-level analysis basis for estimation, can judge whether more accurately to occur electricity filching behavior, and the electric weight reference data of stealing.Comprehensive, the present invention judges whether to occur electricity filching behavior by the relation of the output energy response curve of a plurality of nodes in distributed photovoltaic power generation system and the gross energy of distributed photovoltaic power generation system output, and calculates the reference data that obtains institute's power-steeling quantity.
Accompanying drawing explanation
Fig. 1 is the typical distributed photovoltaic power generation system schematic of prior art;
Fig. 2 is the typical distributed photovoltaic power generation system stealing conspectus of prior art;
Fig. 3 is the system connection layout of the first preferred embodiment of the present invention;
Fig. 4 is the system module block diagram of the second preferred embodiment of the present invention;
Fig. 5 is the system module block diagram of the present invention's the 3rd preferred embodiment;
Fig. 6 is the system module block diagram of the present invention's the 4th preferred embodiment;
Fig. 7 is the system module block diagram of the present invention's the 5th preferred embodiment.
Embodiment
Below in conjunction with each accompanying drawing, content of the present invention is described in further detail.
The typical distributed photovoltaic power generation system schematic of prior art as shown in Figure 1, typical distributed photovoltaic power generation system 200 generally includes: photovoltaic cell group string 210, photovoltaic combining inverter 220 and electric energy meter 240, photovoltaic cell group string 210 is converted into accepted solar energy the input that direct voltage output is connected to photovoltaic combining inverter 220, the peak power output point that photovoltaic combining inverter 220 is followed the tracks of photovoltaic cell group string 210 under internal controller is controlled is converted to direct current and low-voltage network 100 voltage same frequency synchronous sine wave AC electric current feed-in customer charge 230 and low-voltage network 100, conventionally the electric energy meter 240 in this type systematic is bidirectional power meter, the electric weight that the clean power consumption of metering user load 230 and distributed photovoltaic power generation system 200 output to low-voltage network 100 simultaneously.
The typical distributed photovoltaic power generation system stealing conspectus of prior art as shown in Figure 2; User only need output in the DC of photovoltaic combining inverter 220 input and distributed photovoltaic power generation system 200 output of low-voltage network 100, it is the rectifier 250 increasing between Node B, can realize from low-voltage network 100 stealings, the electric weight of stealing is owing to there is no gauge table, therefore cannot obtain power-steeling quantity exactly, if and node A and Node B place do not have other supervising devices, also cannot understand user whether electricity filching behavior occurred.And this rectifier 250 can also, with photovoltaic cell group string 210 together as the input of photovoltaic combining inverter 220, if do not increase supervising device, cannot know whether user electricity filching behavior occurred.
Fig. 3 is the system connection layout of the first preferred embodiment of the present invention; The electricity stealing-prevention monitoring device 300 of described distributed photovoltaic power generation system mainly consists of microcontroller and peripheral circuit, the input of microcontroller comprises: line voltage (Vgrid), feedback net electric current (Io), real-time terrestrial solar radiation intensity (Intensity of Solar Radiation), ambient temperature (Tambient), PV voltage (Vin), PV electric current (Iin), line voltage, feedback net electric current, for the distributed photovoltaic power generation system 200 that comprises accumulate pond, the input of microcontroller also comprises: the voltage Vbat in accumulate pond and accumulate pond current Ib at; Above-mentioned input signal is inputted the ADC input port of MCU after modulate circuit is processed; Signal after collection calculates in MCU, and exports correlated judgment information for Surveillance center's reference.
Fig. 4 is the system module block diagram of the second preferred embodiment of the present invention; Comprise terrestrial solar radiation intensity monitoring unit 320 for monitoring of environmental intensity of solar radiation, for the core data processing unit 310 controlling and calculate with for monitoring the feedback net monitoring means 330 of photovoltaic combining inverter feedback net electric current, power, electric flux; The feedback net monitoring means 330 of described terrestrial solar radiation intensity monitoring unit 320 and described electric flux is all electrically connected to described core data processing unit 310; Described feedback net monitoring means 330 is electrically connected to distributed photovoltaic power generation system 200 in Node B; The time response curve of described terrestrial solar radiation intensity monitoring unit 320 output terrestrial solar radiation intensity; Described core data processing unit 310 is according to the convertible solar energy of time response curve calculation of terrestrial solar radiation intensity; The time response curve of described feedback net monitoring means 330 output feedback net electric currents, voltage, power, electric flux; Described core data processing unit 310 obtains from the electric flux of photovoltaic generating system 200 outputs according to the time response curve calculation of feedback net electric current, voltage, power, electric flux; Time response curve for 310 pairs of terrestrial solar radiation intensity of core data processing unit of controlling and calculating carries out comparison of coherence with the time response curve of feedback net electric current, voltage, power, electric flux; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system 200 outputs; If both are greater than set point at consistency deviation, export stealing warning message.
The electricity stealing-prevention monitoring device that described the second preferred embodiment is the distributed photovoltaic power generation system of reducing the number of most.The consistency of the convertible solar energy that the time response curve calculation of the electric flux of only exporting from photovoltaic generating system 200 by 330 acquisitions of feedback net monitoring means and the terrestrial solar radiation intensity obtaining by terrestrial solar radiation intensity monitoring unit 320 obtains contrasts.
Fig. 5 is the system module block diagram of the present invention's the 3rd preferred embodiment; The 3rd preferred embodiment is also increasing for monitoring the photovoltaic cell group string monitoring means 340 of photovoltaic cell group string 210 output voltages, electric current on the basis of system described in the second preferred embodiment of the present invention; Described photovoltaic cell group string monitoring means 340 one end are electrically connected to core data processing unit 310; The output of described photovoltaic cell group string monitoring means 340 other ends and photovoltaic cell group string 210, node C is electrically connected to; The output voltage of described photovoltaic cell group string monitoring means 340 output photovoltaic cell group strings 210, the time response curve of electric current; Described core data processing unit 310 is by voltage, the current time characteristic curve comparison of coherence of the described terrestrial solar radiation intensity monitoring unit 320 time response curves of output terrestrial solar radiation intensity and the photovoltaic cell group string 210 of described photovoltaic cell group string monitoring means 340 outputs; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system 200 outputs; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the 210 conversion performances declines of photovoltaic cell group string or damage.
On the second preferred embodiment basis, increased control point, be the node C in distributed photovoltaic power generation system 200, at node C place, connect photovoltaic cell group string monitoring means 340 and obtain the output voltage of photovoltaic cell group string 210, the time response curve of electric current, and the energy of photovoltaic cell group string 210 outputs and the electric flux of exporting from photovoltaic generating system 200 Node B are compared.
Fig. 6 is the system module block diagram of the present invention's the 4th preferred embodiment; The 4th preferred embodiment is at the ambient temperature monitoring means 350 also having increased for monitoring of environmental temperature on the basis of system described in the present invention's the 3rd preferred embodiment, and described ambient temperature monitoring means 350 is electrically connected to core data processing unit 310; The time response curve of described ambient temperature monitoring means 350 output environment temperature; Described core data processing unit 310 first carries out the time response curve of ambient temperature and the time response curve of described terrestrial solar radiation intensity monitoring unit 320 output terrestrial solar radiation intensity carries out comparison of coherence; Described core data processing unit 310 also carries out the time response curve of ambient temperature and the voltage of photovoltaic cell group string 210, current time characteristic curve consistency are carried out comparison of coherence; If the deviation of above-mentioned twice contrast is all less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system 200 outputs; If the deviation of above-mentioned twice contrast has any one to be greater than set point, export stealing warning message or be judged as the 210 conversion performances declines of photovoltaic cell group string or damage.
On the 3rd preferred embodiment basis, increase ambient temperature monitoring means 350, thereby obtained the solar energy information that photovoltaic cell group string transforms more accurately.
Fig. 7 is the system module block diagram of the present invention's the 5th preferred embodiment; Described electricity stealing-prevention monitoring device 300 has also increased Storage Battery Monitor Unit 360, network element 370 and man-machine interaction unit 380 on the basis of the present invention's the 4th preferred embodiment; One end of described Storage Battery Monitor Unit 360 is electrically connected to core data processing unit 310; Described Storage Battery Monitor Unit 360 other ends are electrically connected to the output D of storage battery 260; The time response curve of described Storage Battery Monitor Unit 360 output battery tensions and electric current; Described core data processing unit 310 is according to the time response curve of battery tension and electric current, calculate the electric flux of exporting from storage battery in a period of time, and carry out comparing calculation with the electric flux consistency of exporting from photovoltaic generating system 200, if the electric flux of photovoltaic generating system 200 outputs and the electric flux high conformity from storage battery output, be that both deviations are less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system 200 outputs; If both are greater than set point at deviation, export stealing warning message or be judged as storage battery 260 conversion performances declines or damage.Storage Battery Monitor Unit 360, when described distributed photovoltaic power generation system 200 comprises storage battery 260, can obtain the energy of distributed photovoltaic power generation system 200 outputs more accurately, improves the accuracy of judgement.
Described network element 370 and man-machine interaction unit 380 are all electrically connected to core data processing unit 310; Described network element 370 comprises serial communication interface or wireless communication module, realizes and communicating by letter with Surveillance center; Described man-machine interaction unit 380 comprises for the button of manual parameter typing and setting and for equipment operational factor and running status demonstration LCD display module and LED light, realizes on-the-spot man-machine interaction.
Described network element 370 comprises serial communication interface or wireless communication module; For man-machine communication's man-machine interaction unit 380, described man-machine interaction unit 380 comprises for the button of manual parameter typing and setting and for equipment operational factor and running status demonstration LCD display module and LED light.
The present invention has not only realized early stage automatic monitoring, identification and the early warning to the potential electricity filching behavior of distributed photovoltaic grid-connected system user; And the core data processing unit 310 in above-mentioned each preferred embodiment has also comprised the memory cell of above-mentioned various data, can preserve the long history data of each electrical parameter, can transfer relevant historical record for investigation and evidence collection by man-machine interaction unit 380 where necessary.Because real of electrical production is practical, actual how many electric weight of stealing of user are difficult to evidence obtaining, and each electric weight historical data of native system also can be used as the reference frame that user's electricity filching behavior is confirmed rear grid company counting loss.
Each preferred embodiment of the present invention can, as the electricity stealing-prevention monitoring device of distributed photovoltaic power generation system independently, also can be used as an integrated distributed photovoltaic that is applied to of functional unit and generate electricity by way of merging two or more grid systems in device.
The above execution mode has only been expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention; It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention; Therefore, all equivalents and modifications of doing with the claims in the present invention scope, all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. the electricity stealing-prevention monitoring device of a distributed photovoltaic power generation system (300), is characterized in that:
Comprise terrestrial solar radiation intensity monitoring unit (320) for monitoring of environmental intensity of solar radiation, for the core data processing unit (310) controlling and calculate with for monitoring the feedback net monitoring means (330) of photovoltaic combining inverter feedback net electric current, power, electric flux;
Described terrestrial solar radiation intensity monitoring unit (320) and described feedback net monitoring means (330) are all electrically connected to described core data processing unit (310); Described feedback net monitoring means (330) is electrically connected to distributed photovoltaic power generation system (200) in Node B;
The time response curve of described terrestrial solar radiation intensity monitoring unit (320) output terrestrial solar radiation intensity; Described core data processing unit (310) is calculated convertible solar energy according to the time response opisometer of terrestrial solar radiation intensity;
The time response curve of described feedback net monitoring means (330) output feedback net electric current, voltage, power, electric flux; Described core data processing unit (310) obtains from the electric flux of photovoltaic generating system (200) output according to the time response curve calculation of feedback net electric current, voltage, power, electric flux;
Described core data processing unit (310) carries out comparison of coherence to the time response curve of terrestrial solar radiation intensity and the time response curve of feedback net electric current, voltage, power, electric flux; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at consistency deviation, export stealing warning message.
2. electricity stealing-prevention monitoring device according to claim 1 (300), is characterized in that:
Also comprise that described photovoltaic cell group string monitoring means (340) one end is electrically connected to core data processing unit (310) for monitoring the photovoltaic cell group string monitoring means (340) of photovoltaic cell group string (210) output voltage, electric current; Described photovoltaic cell group string monitoring means (340) other end is electrically connected to the output (C) of photovoltaic cell group string (210); The output voltage of described photovoltaic cell group string monitoring means (340) output photovoltaic cell group string (210), the time response curve of electric current;
Described core data processing unit (310) carries out comparison of coherence to voltage, the current time characteristic curve of the time response curve of terrestrial solar radiation intensity and photovoltaic cell group string (210); If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of photovoltaic cell group string (210) conversion performance or damage.
3. electricity stealing-prevention monitoring device according to claim 1 (300), is characterized in that:
Also comprise the ambient temperature monitoring means (350) for monitoring of environmental temperature, described ambient temperature monitoring means (350) is electrically connected to core data processing unit (310); The time response curve of described ambient temperature monitoring means (350) output environment temperature;
Described core data processing unit (310) first carries out comparison of coherence by the time response curve of the time response curve of ambient temperature and described terrestrial solar radiation intensity monitoring unit (320) output terrestrial solar radiation intensity; Described core data processing unit (310) also carries out comparison of coherence by the voltage of the time response curve of ambient temperature and photovoltaic cell group string (210), current time characteristic curve consistency; If the deviation of above-mentioned twice contrast is all less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If the deviation of above-mentioned twice contrast has any one to be greater than set point, export stealing warning message or be judged as the decline of photovoltaic cell group string (210) conversion performance or damage.
4. electricity stealing-prevention monitoring device according to claim 1 (300), is characterized in that:
Also comprise that one end of described Storage Battery Monitor Unit (360) is electrically connected to core data processing unit (310) for monitoring the Storage Battery Monitor Unit (360) of storage battery (260) operating state; The output of described Storage Battery Monitor Unit (360) other end and storage battery (260), node D is electrically connected to; The time response curve of described Storage Battery Monitor Unit (360) output battery tension and electric current;
Described core data processing unit (310) is according to the time response curve of battery tension and electric current, calculate the electric flux of exporting from storage battery in a period of time, and carry out comparing calculation with the electric flux consistency of exporting from photovoltaic generating system (200), if the electric flux of photovoltaic generating system (200) output and the electric flux high conformity from storage battery output, be that both deviations are less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at deviation, export stealing warning message or be judged as the decline of storage battery (260) conversion performance or damage.
5. electricity stealing-prevention monitoring device according to claim 1 (300), is characterized in that,
Also comprise for the network element (370) of same Surveillance center contact with for man-machine communication's man-machine interaction unit (380); Described network element (370) and man-machine interaction unit (380) are all electrically connected to core data processing unit (310);
Described network element (370) comprises serial communication interface or wireless communication module, realizes and communicating by letter with Surveillance center;
Described man-machine interaction unit (380) comprises for the button of manual parameter typing and setting and for equipment operational factor and running status demonstration LCD display module and LED light, realizes on-the-spot man-machine interaction.
6. an anti-electricity-theft monitoring method for distributed photovoltaic power generation system, is characterized in that, comprises the following steps:
A. in the working region of photovoltaic cell group string (210), terrestrial solar radiation intensity monitoring unit (320) is set, obtains intensity of solar radiation information, the time response curve of output terrestrial solar radiation intensity; For the core data processing unit (310) controlling and calculate, according to the time response curve calculation of terrestrial solar radiation intensity, go out the convertible solar energy of photovoltaic generating system (200);
B. in photovoltaic combining inverter output, node A arranges feedback net monitoring means (330), the time response curve of the electric current of feedback net monitoring means (330) monitoring photovoltaic combining inverter (220) output, voltage, power, electric flux; The time response curve of described feedback net monitoring means (330) output feedback net electric current, voltage, power, electric flux; Described core data processing unit (310) obtains from the electric flux of photovoltaic generating system (200) output according to the time response curve calculation of feedback net electric current, voltage, power, electric flux;
The time response curve of c, the electric current of the time response curve of the terrestrial solar radiation intensity obtaining from terrestrial solar radiation intensity monitoring unit (320) and described photovoltaic combining inverter (220) being exported for the core data processing unit (310) controlling and calculate, voltage, power, electric flux carries out comparison of coherence; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at consistency deviation, export stealing warning message.
7. anti-electricity-theft monitoring method according to claim 6, is characterized in that, also comprises step after described step c:
D. in photovoltaic cell group string (210) output, be the photovoltaic cell group string monitoring means (340) that node C is provided for monitoring photovoltaic cell group string (210) output voltage, current information, the output voltage of described photovoltaic cell group string monitoring means (340) output photovoltaic cell group string (210), the time response curve of electric current;
E. described core data processing unit (310) carries out comparison of coherence by voltage, the current time characteristic curve of the photovoltaic cell group string (210) of the terrestrial solar radiation strength time characteristic curve of described terrestrial solar radiation intensity monitoring unit (320) output and described photovoltaic cell group string monitoring means (340) output; If both are less than set point at deviation, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of photovoltaic cell group string (210) conversion performance or damage.
8. anti-electricity-theft monitoring method according to claim 6, is characterized in that, also comprises step after described step c:
F. in the working region of photovoltaic cell group string (210), be provided for the ambient temperature monitoring means (350) of monitoring of environmental temperature, the time response curve of described ambient temperature monitoring means (350) output environment temperature;
G. described core data processing unit (310) first carries out comparison of coherence by the time response curve of the time response curve of ambient temperature and described terrestrial solar radiation intensity monitoring unit (320) output terrestrial solar radiation intensity; Described core data processing unit (310) also carries out comparison of coherence by the voltage of the time response curve of ambient temperature and photovoltaic cell group string (210), current time characteristic curve consistency; If the deviation of above-mentioned twice contrast is all less than set point, be judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If the deviation of above-mentioned twice contrast has any one to be greater than set point, export stealing warning message or be judged as the decline of photovoltaic cell group string (210) conversion performance or damage.
9. anti-electricity-theft monitoring method according to claim 6, is characterized in that, also comprises step after described step c:
H. in the output of storage battery (260), node D is provided for monitoring the Storage Battery Monitor Unit (360) of battery-operated state, the time response curve of described Storage Battery Monitor Unit (360) output battery tension and electric current;
I. described core data processing unit (310) is according to the time response curve of battery tension and electric current, calculate in a period of time the electric flux from storage battery output, and with this period in from the electric flux consistency of photovoltaic generating system (200) output, carry out comparing calculation; If the electric flux of photovoltaic generating system (200) output and the electric flux high conformity from storage battery output, both deviations are less than set point, are judged as the solar energy transforming from photovoltaic cell group from the electric flux of photovoltaic generating system (200) output; If both are greater than set point at consistency deviation, export stealing warning message or be judged as the decline of storage battery (260) conversion performance or damage.
10. anti-electricity-theft monitoring method according to claim 6, is characterized in that, also comprises step after described step c:
J. by the man-machine interaction unit (380) for man-machine communication, obtain operational factor and running state information, and accept monitoring parameter setting;
K. by the network element (370) for the contact of same Surveillance center, result and the warning message of the contrast of the time response curve of the various physical quantitys that monitor, each physical quantity time response are sent to Surveillance center, and accept the control command send from Surveillance center.
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