CN202649334U - Alternating current collector based on information system of photovoltaic power station - Google Patents
Alternating current collector based on information system of photovoltaic power station Download PDFInfo
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- CN202649334U CN202649334U CN 201220154917 CN201220154917U CN202649334U CN 202649334 U CN202649334 U CN 202649334U CN 201220154917 CN201220154917 CN 201220154917 CN 201220154917 U CN201220154917 U CN 201220154917U CN 202649334 U CN202649334 U CN 202649334U
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Abstract
The utility model discloses an alternating current collector based on an information system of a photovoltaic power station. The alternating current collector comprises an MCU, a power module, an electrical quantity collecting module, an RS232 interface and an RS485 interface. The power module supplies power to the MCU. The electrical quantity collecting module comprises a voltage transformer and a current transformer. Measured voltage signals and current signals are transmitted to the MCU by the electrical quantity collecting module. A PC machine is communicated with the MCU via the RS232 interface to set address and preset parameters. The MCU is connected with an integrated electricity information collector via the RS485 interface. The MCU transmits data which is measured in real time to the integrated electricity information collector, and meanwhile receives and executes an instruction which is issued by the integrated electricity information collector via the RS485 interface. The alternating current collector of the utility model, which is convenient to mount and reliable to operate, realizes measurement of multiple solar inverters with low cost. No more than three alternating current collectors can be cascaded via RS485 ports.
Description
Technical field
The utility model relates to a kind of photovoltaic plant infosystem, specifically, is a kind of interchange collector based on the photovoltaic plant infosystem.
Background technology
Along with the development of world economy, the supply day of electric power energy is becoming tight.Tradition is faced with the reserves threat less and less of coal, oil on the one hand, and on the other hand, when utilizing fuel production electric power, environment has been caused serious pollution with the electric power resource of fuel production.Be becoming tight in energy resources supply day, when ecological deterioration increasingly sharpens, the dynamics that energy-saving and emission-reduction are carried out by country continues to increase, the consciousness that people pay attention to environmental protection is also improving constantly.Because sun power is the cleanest energy, it is seen everywhere, and forever exists.Thereby increasing people turns to notice and utilizes solar electrical energy generation, particularly based on the photovoltaic plant of opto-electronic conversion.
Interchange collector based on photovoltaic plant, be used for measuring output voltage, output current, output power, the accumulative total of generating electricity, the accumulated running time of solar inverter, and these data communication devices are crossed RS485 send in real time the comprehensive electric energy information acquisition device, and send to network data center by the comprehensive electric energy information acquisition device.Because the comprehensive electric energy information acquisition device can only be measured the data of a solar inverter, the solar inverter of installing more than one situation under, need to use and exchange collector and expand, so just can realize DATA REASONING and the transmission of many inverters.Comprehensive electric energy collector at the most can three interchange collectors of cascade, and a comprehensive electric energy collector can connect a photovoltaic DC-to-AC converter.Exchange collector and can receive and carry out the instruction that the comprehensive electric energy information acquisition device sends by RS485.
The utility model content
The utility model purpose is to provide a kind of interchange collector based on the photovoltaic plant infosystem, exchanges collector and can realize low-cost measurement to many solar inverters.
The utility model is achieved through the following technical solutions:
Interchange collector based on the photovoltaic plant infosystem, comprise MCU, power module, electric quantity acquisition module, the RS232 interface, the RS485 interface, PC, electric power source pair of module MCU power supply, electric quantity acquisition module comprises voltage transformer (VT), current transformer, electric quantity acquisition module is with the voltage signal of measuring, current signal sends MCU to, PC is communicated by letter with MCU by the RS232 interface, carry out the address, preset parameter is set, MCU connects with a comprehensive electric energy information acquisition device by the RS485 interface, MCU transmits the data of measuring in real time to the comprehensive electric energy information acquisition device, MCU can receive simultaneously, carry out the instruction that the comprehensive electric energy information acquisition device sends by the RS485 interface, exchange collector and can realize cascade by the RS485 port, at the most can three interchange collectors of cascade.
Further, described power module adopts isolation type switching power supply, has guaranteed stability and the reliability of power supply.
Further, MCU adopts the single-chip microcomputer ST32F103VET6 of 32 Cortex-M3 framework.
Further, described voltage transformer (VT) adopts the current mode voltage transformer (VT), has realized the isolation measurement of voltage signal.
Further, described current transformer adopts open-close type current transformer, and convenient the installation realized the isolation measurement of current signal, by adopting the current transformer of different size, can realize the current measurement of large scale and high accuracy.
The principle of work of interchange collector of the present utility model comprises two parts: alternating-current parameter is measured, is communicated by letter with extraneous.
The alternating-current parameter measure portion is specifically: voltage transformer (VT) is current signal with voltage transitions, is converted to voltage signal through resistance, sends into monolithic Bigpian AD mouth.Current transformer is converted to voltage signal with the scaled current signal for isolation of current signal through resistance, sends into the Chip Microcomputer A/D mouth.Convert all voltage signals to digital signal in single-chip microcomputer inside take 0.5ms as the cycle, inner at single-chip microcomputer, the digital signal after the conversion is carried out the high-pass filtering computing, remove DC component, then calculate according to corresponding formula.
Voltage effective value:
F wherein
UBe correction index, u
nBe n voltage sample point value, N is the number of the sampled point that calculates, and N need to count greater than 1/4 cycle, and it is more to count, and it is more accurate to calculate, and N is 200 in exchanging collector, and when mains frequency was 50Hz, N was counting of 4 voltage cycles.
Current effective value:
F wherein
IBe current correction coefficient, i
nBe n current sample point value.
Active power:
The accumulative total electric weight:
F wherein
EBe the electric weight correction coefficient, P is the active power that calculates, and t is the time between twice P value calculated.
With extraneous communications portion:
The communication interface that exchanges collector and the external world has a RS232 mouth and a RS485 interface, and the RS232 interface adopts the MAX3232 chip to carry out level conversion, is used for single-chip microcomputer and PC and communicates, and comprises that program is downloaded and the configuration of correlation parameter.The RS485 interface has adopted the magnetic of ADI company to isolate 485 chip ADM2483, because ADM2483 is the high-speed isolated chip, both guaranteed the reliability of communication, guaranteed again to exchange the safety of collector, simultaneously increase PTC, voltage dependent resistor (VDR), ceramic discharge tube at 485 interfaces, effectively guaranteed to exchange the safety of collector.
Beneficial effect: the utility model has been realized low-cost measurement to many solar inverters, and it is easy for installation, and is reliable.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the modular structure synoptic diagram of an embodiment of the utility model.
Fig. 2 is an embodiment system architecture of the utility model synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated: present embodiment is implemented under take technical solutions of the utility model as prerequisite; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment:
As shown in Figure 1, comprise MCU among the figure, power module, electric quantity acquisition module, the RS232 interface, the RS485 interface, electric power source pair of module MCU power supply, electric quantity acquisition module comprises voltage transformer (VT), current transformer, electric quantity acquisition module is with the voltage signal of measuring, current signal sends MCU to, PC is communicated by letter with MCU by the RS232 interface, carry out the address, preset parameter is set, MCU connects with a comprehensive electric energy information acquisition device by the RS485 interface, exchange collector and transmit the data of measuring in real time to the comprehensive electric energy information acquisition device, MCU can receive simultaneously, carry out the instruction that the comprehensive electric energy information acquisition device sends by the RS485 interface.Exchange collector and can realize cascade by the RS485 port, at the most can three interchange collectors of cascade.
As shown in Figure 2, solar components connects four inverters among the figure, three interchange collectors are used for measuring output voltage, output current, output power, the accumulative total of generating electricity, the accumulated running time of solar inverter, and these data communication devices are crossed RS485 send in real time comprehensive electric energy information acquisition device (comprehensive electric energy information acquisition device itself also gathers one road solar inverter data), and send to network data center by the comprehensive electric energy information acquisition device.The photovoltaic integrated information is adopted the control device and is sent the photovoltaic plant DC operation data of measuring to the comprehensive electric energy information acquisition device by RS485, and sends to network data center by the comprehensive electric energy information acquisition device, checks the service data of photovoltaic plant for the user.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. based on the interchange collector of photovoltaic plant infosystem, comprise MCU, power module, electric quantity acquisition module, the RS232 interface, the RS485 interface, PC, electric power source pair of module MCU power supply, electric quantity acquisition module comprises voltage transformer (VT), current transformer, electric quantity acquisition module is with the voltage signal of measuring, current signal sends MCU to, PC is communicated by letter with MCU by the RS232 interface, carry out the address, preset parameter is set, MCU connects with a comprehensive electric energy information acquisition device by the RS485 interface, MCU transmits the data of measuring in real time to the comprehensive electric energy information acquisition device, MCU can receive simultaneously, carry out the instruction that the comprehensive electric energy information acquisition device sends by the RS485 interface, exchange collector and can realize cascade by the RS485 port, at the most can three interchange collectors of cascade.
2. the interchange collector based on the photovoltaic plant infosystem according to claim 1 is characterized in that, described power module adopts isolation type switching power supply.
3. the interchange collector based on the photovoltaic plant infosystem according to claim 1 is characterized in that, MCU adopts the single-chip microcomputer ST32F103VET6 of 32 Cortex-M3 framework.
4. the interchange collector based on the photovoltaic plant infosystem according to claim 1 is characterized in that, described voltage transformer (VT) adopts the current mode voltage transformer (VT).
5. the interchange collector based on the photovoltaic plant infosystem according to claim 1 is characterized in that, described current transformer adopts open-close type current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154917 CN202649334U (en) | 2012-04-13 | 2012-04-13 | Alternating current collector based on information system of photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154917 CN202649334U (en) | 2012-04-13 | 2012-04-13 | Alternating current collector based on information system of photovoltaic power station |
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| Publication Number | Publication Date |
|---|---|
| CN202649334U true CN202649334U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220154917 Expired - Lifetime CN202649334U (en) | 2012-04-13 | 2012-04-13 | Alternating current collector based on information system of photovoltaic power station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931769A (en) * | 2015-05-15 | 2015-09-23 | 上海太阳能科技有限公司 | 16-path current detection system |
| CN105488991A (en) * | 2016-02-23 | 2016-04-13 | 国网上海市电力公司 | Data collector |
| CN108761193A (en) * | 2018-06-04 | 2018-11-06 | 江苏师范大学 | Quick self-adapted electric parameter metering without phase difference sensor and computational methods |
| CN110940851A (en) * | 2019-11-18 | 2020-03-31 | 中电科仪器仪表(安徽)有限公司 | Power detection device and method for modular programmable photovoltaic system |
| CN113655273A (en) * | 2021-08-20 | 2021-11-16 | 万安裕高电子科技有限公司 | Electricity stealing prevention intelligent ammeter system and method |
-
2012
- 2012-04-13 CN CN 201220154917 patent/CN202649334U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931769A (en) * | 2015-05-15 | 2015-09-23 | 上海太阳能科技有限公司 | 16-path current detection system |
| CN105488991A (en) * | 2016-02-23 | 2016-04-13 | 国网上海市电力公司 | Data collector |
| CN108761193A (en) * | 2018-06-04 | 2018-11-06 | 江苏师范大学 | Quick self-adapted electric parameter metering without phase difference sensor and computational methods |
| CN110940851A (en) * | 2019-11-18 | 2020-03-31 | 中电科仪器仪表(安徽)有限公司 | Power detection device and method for modular programmable photovoltaic system |
| CN113655273A (en) * | 2021-08-20 | 2021-11-16 | 万安裕高电子科技有限公司 | Electricity stealing prevention intelligent ammeter system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
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| CX01 | Expiry of patent term |