CN202085097U - Intelligent controller for photovoltaic confluence box - Google Patents

Intelligent controller for photovoltaic confluence box Download PDF

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Publication number
CN202085097U
CN202085097U CN201120040807XU CN201120040807U CN202085097U CN 202085097 U CN202085097 U CN 202085097U CN 201120040807X U CN201120040807X U CN 201120040807XU CN 201120040807 U CN201120040807 U CN 201120040807U CN 202085097 U CN202085097 U CN 202085097U
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CN
China
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signal
module
photoelectric isolating
links
input
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CN201120040807XU
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Chinese (zh)
Inventor
查赛彬
王正山
李思伟
单向东
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博耳(宜兴)电力成套有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

An intelligent controller for a photovoltaic confluence box comprises a current transformer (1), a voltage transformer (2), an analog quantity input module (3), a signal amplification circuit (4), a switch quantity input module (12), a first photoelectric isolating circuit (16), a second photoelectric isolating circuit (16), a relay output module (15) and a CPU (5), wherein the current transformer (1) and the voltage transformer (2) detect the input current and voltage of a photovoltaic cell, the signal amplification circuit (4) amplifies the input current and voltage and outputs to the CPU (5); and the signal output of the switch quantity input module (12) is connected to the CPU (5), the control signal output end of the CPU (5) is connected to the relay output module (15), and the relay output module (15) outputs a control signal to control the ON and OFF of the relay of the photovoltaic confluence box. The intelligent controller can realtimely monitor and detect in multiple paths, and the control system can satisfy the requirements for high precision and high stability.

Description

Photovoltaic header box intelligent controller
Technical field
The utility model relates to a kind of controller, especially is applied to the control of photovoltaic header box product, specifically a kind of photovoltaic intelligent controller that confluxes.
Background technology
Global ecological environment meets with severe challenge at present, and environment and sustainable economic development become the key problem of international community.Low-carbon economy will become the new engine that leads World Economics recovery and social development as the economic model of sustainable development.And China is accelerating transformation of the mode of economic development, actively build resource-conserving and friendly environment society, solar energy is more and more used widely as the representative of renewable, cleaning, high efficient energy sources, the solar energy industry of China is just in high-speed development period now, and its industry size and application strengthen gradually.
Solar energy large-sized photovoltaic grid-connected system maintains easily in order to reduce connecting line between photovoltaic module and the inverter, improves reliability, and generally need increase the direct current checkout gear that confluxes between photovoltaic module and inverter is the photovoltaic intelligent controller that confluxes.The photovoltaic array lightning protection equipment that confluxes, direct voltage scope according to the inverter input, the identical photovoltaic module of the specification of some is composed in series 1 photovoltaic module tandem, several tandems being inserted photovoltaic array lightning protection header box confluxes again, by exporting behind lightning protection device and the circuit breaker, made things convenient for the access of inverter, the efficient of inverter and the energy of solar cell have been done effective monitoring.But the existing direct current checkout gear that confluxes exists the problem that can not monitor in real time with the detection of multichannel, and control system can't satisfy the requirement of high accuracy and stability.
Summary of the invention
In the purpose of this utility model is low at the existing precision of present photovoltaic header box, framework is unreasonable, and the problem that processing speed waits slowly proposes a kind of photovoltaic header box intelligent controller, can monitor in real time with multichannel and detect, control system can satisfy the requirement of high accuracy and high stability.
The technical solution of the utility model is:
A kind of photovoltaic header box intelligent controller, it comprises current transformer, voltage transformer, analog quantity input module, signal amplification circuit, switching input module, first photoelectric isolating circuit, second photoelectric isolating circuit, relay output module and CPU; Described current transformer and voltage transformer detect input current, the voltage of photovoltaic cell respectively, the signal output part of current transformer, voltage transformer and analog quantity input module links to each other with the signal input part of signal amplification circuit respectively, and the signal output part of signal amplification circuit links to each other with the respective signal input of CPU; Switching input module is gathered the remote signalling amount of photovoltaic cell relay as the remote signalling amount detection signal end of intelligent controller, the signal output part of switching input module links to each other with the signal input part of first photoelectric isolating circuit, the signal output part of first photoelectric isolating circuit links to each other with the remote signalling amount signal input part of CPU, the CPU control signal output ends links to each other with the signal input part of second photoelectric isolating circuit, the signal output part of second photoelectric isolating circuit links to each other with the signal input part of relay output module, the break-make of relay output module output control signal control photovoltaic header box relay.
Photovoltaic header box of the present utility model also comprises jtag interface, light-emitting diode, toggle switch, clock module and power module with intelligent controller, and described power module and clock module provide working power and work clock for intelligent controller; The address signal input of CPU links to each other with the signal output part of toggle switch; The shows signal output of CPU links to each other with light-emitting diode, and CPU is connected with the jtag interface two-phase.
Photovoltaic header box of the present utility model also comprises RS485 communication interface, RS485-RS232 modular converter, the 3rd photoelectric isolating circuit and RS232 communication interface with intelligent controller, one signal end of described RS485 communication interface and host computer wireless connections, another signal end links to each other with a signal end of the 3rd photoelectric isolating circuit by RS485-RS232 modular converter, another signal end of the 3rd photoelectric isolating circuit links to each other with the 3rd cache module, and the 3rd cache module links to each other with the upper machine communication end of CPU; The observing and controlling machine communication terminal of CPU links to each other with the RS232 communication interface.
Current transformer of the present utility model is the Hall current instrument transformer, and this Hall current instrument transformer is 20 four the tunnel.
Voltage transformer of the present utility model is the Hall voltage instrument transformer, and this Hall voltage instrument transformer is one the tunnel.
Switching input module of the present utility model is ten the tunnel with first photoelectric isolating circuit that links to each other with switching input module.
Relay output module of the present utility model is four the tunnel with second photoelectric isolating circuit that links to each other with relay output module.
Be respectively equipped with first cache module and second cache module between first photoelectric isolating circuit of the present utility model, second photoelectric isolating circuit and the CPU.
Analog quantity input module of the present utility model is temperature sensor or humidity sensor.
The utility model also comprises jtag interface, and described jtag interface links to each other with CPU.
The beneficial effects of the utility model:
The utility model adopts the ARM 32bit microcontroller LPC1766 of the 2nd ARM Cortex-M3 kernel, be to use the high-performance that designs, the 32-bit microprocessor of low-power consumption, be applicable to fields such as instrument and meter, industrial communication, Electric Machine Control, light control, warning system for embedded system.Its frequency of operation is up to 100MHz, adopt 3 level production lines and Harvard structure, the three-bus of being with independently local instruction and data bus and being used for the low performance of peripheral hardware makes code execution speed up to 1.25MIPS/MHz, and comprises the finger unit of looking ahead, 1 inside of supporting redirect at random.LPC1766 has increased the Flash memory accelerating module of a special use, makes that operation code can reach comparatively ideal performance in Flash.And abundant Peripheral Interface is arranged, and the highest configuration comprises Flash program storage in the 512KB sheet, 96KB on-chip SRAM, the interior EEPROM of 4KB sheet, 8 passage GPDMA controllers, 4 32 general purpose timers, 12 ADC of 8 passages, 1 10 DAC, 1 tunnel Electric Machine Control PWM output (MCPWM), 1 orthogonal encoder interface, 6 road general PWM outputs, 1 WatchDog Timer and an independently-powered super low-power consumption RTC.LPC1766 is very suitable with its superior performance and abundant Peripheral Interface as the control core CPU of the measurement and control unit that confluxes.Through its stability of long use test and adaptive capacity to environment, ensured the stability of a system and the system monitoring precision of the measurement and control unit that confluxes.
What the current signal of the utility model collection photovoltaic cell group adopted is Hall direct current closed-loop sensors, and what gather the voltage signal employing is the detection means of Hall direct voltage closed-loop sensors as system, has guaranteed the accuracy and the stability of system monitoring.
The embedded microprocessor that this device adopts makes structure reduce, and processing speed is fast, and breakthrough is arranged on framework, makes ratio of precision generally high.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, a kind of photovoltaic header box intelligent controller, it comprises that current transformer 1, voltage transformer 2, analog quantity input module 3(model can be BR-AI001), signal amplification circuit 4, switching input module 12(model can be BR-DI001), first photoelectric isolating circuit 13, second photoelectric isolating circuit 16, relay output module 15(model can be BR-DO001) and the CPU5(model can be the ARM 32bit microcontroller LPC1766 of the 2nd ARM Cortex-M3 kernel); Described current transformer 1 and voltage transformer 2 detect input current, the voltage of photovoltaic cell respectively, the signal output part of current transformer 1, voltage transformer 2 and analog quantity input module 3 links to each other with the signal input part of signal amplification circuit 4 respectively, and the signal output part of signal amplification circuit 4 links to each other with the respective signal input of CPU5; Switching input module 12 is gathered the remote signalling amount of photovoltaic cell relay as the remote signalling amount detection signal end of intelligent controller, the signal output part of switching input module 12 links to each other with the signal input part of first photoelectric isolating circuit 13, the signal output part of first photoelectric isolating circuit 13 links to each other with the remote signalling amount signal input part of CPU5, the CPU5 control signal output ends links to each other with the signal input part of second photoelectric isolating circuit 16, the signal output part of second photoelectric isolating circuit 16 links to each other with the signal input part of relay output module 15, the break-make of relay output module 15 output control signal control photovoltaic header box relays.
The utility model also comprises jtag interface 8, light-emitting diode 9, toggle switch 10, clock module 11 and power module 6, and described power module 6 and clock module 11 provide working power and work clock for intelligent controller; The address signal input of CPU5 links to each other with the signal output part of toggle switch 10; The shows signal output of CPU5 links to each other with light-emitting diode 9, and CPU5 is connected with jtag interface 8 two-phases.
The utility model also comprises RS485 communication interface 18, RS485-RS232 modular converter 19, the 3rd photoelectric isolating circuit 20 and RS232 communication interface 7, one signal end of described RS485 communication interface 18 and host computer wireless connections, another signal end links to each other with a signal end of the 3rd photoelectric isolating circuit 20 by RS485-RS232 modular converter 19, another signal end of the 3rd photoelectric isolating circuit 20 links to each other with the 3rd cache module 21, and the 3rd cache module 21 links to each other with the upper machine communication end of CPU5; The observing and controlling machine communication terminal of CPU5 links to each other with RS232 communication interface 7.
A kind of photovoltaic header box intelligent controller, the electric current that collects the photovoltaic cell group are by 20 No. four current transformers 1, and signal is input to the CPU5 microprocessor by signal amplification circuit 4 and carries out the current signal processing; Collect the voltage of photovoltaic cell group: No. one voltage transformer 2 signals are input to the CPU5 microprocessor by signal amplification circuit 4 and carry out the voltage signal processing; And can be input to the CPU5 microprocessor by signal amplification circuit 4 to the two-way analog quantity input 3 of the input of photovoltaic cell group and carry out analog signals and handle; Input AC AC85~268VAC or direct current DC120~370VDC power supply convert 2~3.6V to through power module 6 and are input to the CPU5 microprocessor then and power, the device on be provided with two communication interfaces wherein RS232 communication interface 7 can carry out transfer of data by the CPU5 microprocessor, also can receive input and import the CPU5 microprocessor into, another RS485 communication interface 18 can the input and output data, and by RS485 communication interface 18 transmission and receive RS485-RS232 modular converter 19 with the RS485 conversion of signals to the RS232 signal, can isolate by 20 pairs of input and output circuit of RS485-RS232 modular converter 19 to the 3rd photoelectric isolating circuits again, thereby can suppress system noise effectively, eliminate the interference of grounded circuit, and signal is cushioned by the 3rd cache module 21 reserved memories; And then be input to the CPU5 microprocessor and carry out signal processing; This device can carry out on-the-spot online programming and internal node to be tested; From jtag interface 8 input and output to the CPU5 microprocessor internal node tested also and can carry out online programming; Whether the signal lamp that this device is provided with adopts the LED signal lamp, outputed to light-emitting diode 9 index signals can correct to the signal of transmission by the CPU5 microprocessor; 10 pairs of addresses of eight toggle switchs also are set in the system are provided with, by toggle switch 10 signal is transferred to the CPU5 microprocessor and carries out address setting;
Be input to the CPU5 microprocessor by clock module 11 setting and carry out predetermined system start-up time; This device is input to corresponding ten tunnel first photoelectric isolating circuits 13 by ten way switch amount input modules 12, is input to first cache module 14 again by ten tunnel first photoelectric isolating circuits 13 then, is input to the CPU5 microprocessor afterwards and carries out signal processing; Exporting four road signals by the CPU5 microprocessor cushions signal by second cache module, 17 reserved memories, by second cache module 17 signal is sent to four tunnel second photoelectric isolating circuits 16 again, and output to four-way switch amount relay output module 15 by four road photoelectric isolating circuits 16 through handling, reach and control.This device adopts Hall direct current closed-loop sensors that the input condition of photovoltaic cell is detected by 20 four tunnel current detecting, and adopt Hall direct voltage closed-loop sensors that the input condition of photovoltaic cell is detected to one road voltage of input, can also detect ten way switch amount signals.
This device is set two input and output interfaces, and light is set on circuit effectively suppresses system's noise sound and eliminate grounded circuit and disturb every circuit, guarantees the authenticity of signal, and this structure adopts Harvard structure and 3 streamlines.
Conflux measurement and control unit as the detection of the photovoltaic group equipment that confluxes, main man-machine interaction mode is by the RS485 interface relevant informations such as electric current, voltage, power and warning of photovoltaic group to be delivered to host computer, and to the configuration information transmission of measurement and control unit.Thereby to indicate accurately the state information of communication, in order accurately to indicate the communication state of measurement and control unit and host computer, when design with the data of communication send, received signal is as the indication control signal of external LED, can indicate the state of communication so the most accurately, simultaneously in order not influence the stability of data communication, we send between reception and the LED indication in data has increased the BUFFER buffer as Signal Spacing, has increased the signal driving force simultaneously.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.

Claims (9)

1. photovoltaic header box intelligent controller is characterized in that it comprises current transformer (1), voltage transformer (2), analog quantity input module (3), signal amplification circuit (4), switching input module (12), first photoelectric isolating circuit (13), second photoelectric isolating circuit (16), relay output module (15) and CPU(5); Described current transformer (1) and voltage transformer (2) detect input current, the voltage of photovoltaic cell respectively, the signal output part of current transformer (1), voltage transformer (2) and analog quantity input module (3) links to each other with the signal input part of signal amplification circuit (4) respectively, the signal output part and CPU(5 of signal amplification circuit (4)) the respective signal input link to each other; Switching input module (12) is gathered the remote signalling amount of photovoltaic cell relay as the remote signalling amount detection signal end of intelligent controller, the signal output part of switching input module (12) links to each other with the signal input part of first photoelectric isolating circuit (13), the signal output part and CPU(5 of first photoelectric isolating circuit (13)) remote signalling amount signal input part link to each other, CPU(5) control signal output ends links to each other with the signal input part of second photoelectric isolating circuit (16), the signal output part of second photoelectric isolating circuit (16) links to each other with the signal input part of relay output module (15), the break-make of relay output module (15) output control signal control photovoltaic header box relay.
2. photovoltaic header box intelligent controller according to claim 1, it is characterized in that it also comprises jtag interface (8), light-emitting diode (9), toggle switch (10), clock module (11) and power module (6), described power module (6) and clock module (11) provide working power and work clock for intelligent controller; CPU(5) address signal input links to each other with the signal output part of toggle switch (10); CPU(5) shows signal output links to each other with light-emitting diode (9), CPU(5) is connected with jtag interface (8) two-phase.
3. photovoltaic header box intelligent controller according to claim 1, it is characterized in that it also comprises RS485 communication interface (18), RS485-RS232 modular converter (19), the 3rd photoelectric isolating circuit (20) and RS232 communication interface (7), one signal end of described RS485 communication interface (18) and host computer wireless connections, another signal end links to each other with a signal end of the 3rd photoelectric isolating circuit (20) by RS485-RS232 modular converter (19), another signal end of the 3rd photoelectric isolating circuit (20) links to each other with the 3rd cache module (21), the 3rd cache module (21) and CPU(5) the upper machine communication end link to each other; CPU(5) observing and controlling machine communication terminal links to each other with RS232 communication interface (7).
4. photovoltaic header box intelligent controller according to claim 1 is characterized in that described current transformer (1) is the Hall current instrument transformer, and this Hall current instrument transformer is 20 four the tunnel.
5. photovoltaic header box intelligent controller according to claim 1 is characterized in that described voltage transformer (2) is the Hall voltage instrument transformer, and this Hall voltage instrument transformer is one the tunnel.
6. photovoltaic header box intelligent controller according to claim 1 is characterized in that described switching input module (12) is ten the tunnel with first photoelectric isolating circuit (13) that links to each other with switching input module (12).
7. photovoltaic header box intelligent controller according to claim 1 is characterized in that described relay output module (15) is four the tunnel with second photoelectric isolating circuit (13) that links to each other with relay output module (15).
8. photovoltaic header box intelligent controller according to claim 1, it is characterized in that described first photoelectric isolating circuit (13), second photoelectric isolating circuit (13) and CPU(5) between be respectively equipped with first cache module (14) and second cache module (17).
9. photovoltaic header box intelligent controller according to claim 1 is characterized in that described analog quantity input module (3) is temperature sensor or humidity sensor.
CN201120040807XU 2011-02-17 2011-02-17 Intelligent controller for photovoltaic confluence box CN202085097U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102820809A (en) * 2012-09-15 2012-12-12 无锡隆玛科技股份有限公司 Mini-type intelligent photovoltaic junction box
CN103149890A (en) * 2013-01-25 2013-06-12 上海友邦电气(集团)股份有限公司 Current convergence monitoring device
CN104345673A (en) * 2014-11-01 2015-02-11 李钦源 Digital type universal measuring and controlling device with communication function
CN104362690A (en) * 2014-10-29 2015-02-18 中国石油化工股份有限公司 Direct current screen with lithium battery and charging system thereof
CN104749985A (en) * 2013-12-25 2015-07-01 中国科学院沈阳自动化研究所 CPLD-based coding and decoding control unit and coding and decoding method thereof
CN104931769A (en) * 2015-05-15 2015-09-23 上海太阳能科技有限公司 16-path current detection system
CN110429913A (en) * 2019-07-31 2019-11-08 博耳(无锡)电力成套有限公司 Photovoltaic conflux boxes detecting device
CN111525886A (en) * 2020-04-29 2020-08-11 上海虑信电力科技有限公司 Communication collection processing controller

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102820809A (en) * 2012-09-15 2012-12-12 无锡隆玛科技股份有限公司 Mini-type intelligent photovoltaic junction box
CN102820809B (en) * 2012-09-15 2015-06-10 无锡隆玛科技股份有限公司 Mini-type intelligent photovoltaic junction box
CN103149890A (en) * 2013-01-25 2013-06-12 上海友邦电气(集团)股份有限公司 Current convergence monitoring device
CN104749985A (en) * 2013-12-25 2015-07-01 中国科学院沈阳自动化研究所 CPLD-based coding and decoding control unit and coding and decoding method thereof
CN104362690A (en) * 2014-10-29 2015-02-18 中国石油化工股份有限公司 Direct current screen with lithium battery and charging system thereof
CN104345673A (en) * 2014-11-01 2015-02-11 李钦源 Digital type universal measuring and controlling device with communication function
CN104931769A (en) * 2015-05-15 2015-09-23 上海太阳能科技有限公司 16-path current detection system
CN110429913A (en) * 2019-07-31 2019-11-08 博耳(无锡)电力成套有限公司 Photovoltaic conflux boxes detecting device
CN111525886A (en) * 2020-04-29 2020-08-11 上海虑信电力科技有限公司 Communication collection processing controller

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