CN203261257U - Solar photovoltaic power generation single-phase grid-connected inverter - Google Patents

Solar photovoltaic power generation single-phase grid-connected inverter Download PDF

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Publication number
CN203261257U
CN203261257U CN2013202938262U CN201320293826U CN203261257U CN 203261257 U CN203261257 U CN 203261257U CN 2013202938262 U CN2013202938262 U CN 2013202938262U CN 201320293826 U CN201320293826 U CN 201320293826U CN 203261257 U CN203261257 U CN 203261257U
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CN
China
Prior art keywords
circuit
inverter
module
phase grid
power generation
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2013202938262U
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Chinese (zh)
Inventor
王长华
冯光佩
高家富
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ANHUI POWERSOLAR NEW ENERGY Co Ltd
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ANHUI POWERSOLAR NEW ENERGY Co Ltd
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Priority to CN2013202938262U priority Critical patent/CN203261257U/en
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Publication of CN203261257U publication Critical patent/CN203261257U/en
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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
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The utility model discloses a solar photovoltaic power generation single-phase grid-connected inverter. The solar photovoltaic power generation single-phase grid-connected inverter comprises a direct current-side filtering circuit, a sampling circuit, a boost circuit, an inverting circuit, a relay protection and leakage current detection circuit and an alternating current-side filtering circuit. The solar photovoltaic power generation single-phase grid-connected inverter further comprises a dual-MCU redundant controller as well as a PV voltage sampling module, an MPPT module, an inversion drive module and a detection module which are connected with the dual-MCU redundant controller, wherein the PV voltage sampling module is connected with the output end of the sampling circuit, the MPPT module is connected with the input end of the boost circuit, the inversion drive module is connected with the input end of the inverting circuit, and the detection module is connected with the output end of the relay protection and leakage current detection circuit. The solar photovoltaic power generation single-phase grid-connected inverter of the utility model can perform power grid detection, islanding protection, over-voltage/under-voltage protection, and over-frequency /under-frequency protection in a real-time mode when the solar photovoltaic power generation single-phase grid-connected inverter works. The solar photovoltaic power generation single-phase grid-connected inverter has the advantages of simple structure, high efficiency, safety, stably improved conversion efficiency and heat loss reduction.

Description

The solar energy power generating single-phase grid-connected inverter
Technical field
The utility model relates to a kind of solar energy power generating single-phase grid-connected inverter.
Background technology
Solar energy is a kind of clean reproducible energy, and the development solar energy power generating has important effect for shortage, the environmental contamination reduction of alleviating conventional energy resource.The direct current that inverter is used for solar cell is sent is converted into alternating current for load, has vital effect aspect the development and utilization of new forms of energy.The Key Performance Indicator of photovoltaic combining inverter comprises: conversion efficiency, harmonic content, electromagnetic compatibility, idle adjusting, island protect, mistake under voltage, mistake underfrequency protection etc.Along with the development of combining inverter, people are to the quality of power supply of combining inverter, and the each side such as security performance require more and more higher.At present the topology of the photovoltaic combining inverter of photovoltaic application mainly is single-phase semi-bridge, full bridge structure, the transformation efficiency of inverter is not high, circuit is complicated, job insecurity, thermal losses too much, be unfavorable for miniaturization and the cost degradation of photovoltaic combining inverter.
The utility model content
The purpose of this utility model be solve that the photovoltaic combining inverter transformation efficiency of photovoltaic application is not high, circuit is complicated, job insecurity, thermal losses too much, be unfavorable for the miniaturization of photovoltaic combining inverter and the problem of cost degradation.
The technical solution adopted in the utility model is: the solar energy power generating single-phase grid-connected inverter; it comprises the DC side filter circuit that is electrically connected successively; sample circuit; the BOOST booster circuit; inverter circuit; relaying protection and leakage current detection circuit and AC filter circuit; it also comprises two MCU redundant manipulators and the PV voltage sample module that links to each other with two MCU redundant manipulators; the MPPT module; inversion driver module and detection module; PV voltage sample module links to each other with the output of sample circuit; the MPPT module links to each other with the input of BOOST booster circuit; inversion starts module and links to each other with the input of inverter circuit, and the output of detection module and relaying protection and leakage current detection circuit connects.
As further improvement of the utility model, this solar energy power generating single-phase grid-connected inverter also comprises LCD and the communication module that links to each other with two MCU redundant manipulators respectively.
The beneficial effect that the utility model adopts is: after having adopted this structure; the utility model in the course of the work; for electrical network detection, island protect, overvoltage/undervoltage protection, cross underfrequency protection etc. and all carry out in real time, this inverter structure is simple, efficient, safety, stablely improved transformation efficiency, reduced thermal losses.
Description of drawings
Fig. 1 is the utility model schematic diagram.
Shown in the figure: 1 DC side filter circuit, 2 sample circuits, 3 BOOST booster circuits, 4 inverter circuits, 5 relaying protections and leakage current detection circuit, 6 AC filter circuits.
Embodiment
Below in conjunction with Fig. 1, the utility model is described further.
As shown in Figure 1; the utility model embodiment: solar energy power generating single-phase grid-connected inverter; it comprises the DC side filter circuit 1 that is electrically connected successively; sample circuit 2; BOOST booster circuit 3; inverter circuit 4; relaying protection and leakage current detection circuit 5 and AC filter circuit 6; this solar energy power generating single-phase grid-connected inverter also comprises two MCU redundant manipulators and the PV voltage sample module that links to each other with two MCU redundant manipulators; the MPPT module; inversion starts module and detection module; PV voltage sample module links to each other with the output of sample circuit; the MPPT module links to each other with the input of BOOST booster circuit; the inversion driver module links to each other with the input of inverter circuit; the output of detection module and relaying protection and leakage current detection circuit connects, and it also comprises LCD and the communication module that links to each other with two MCU redundant manipulators respectively.
In the utility model, DC side filter circuit 1 is used for the clutter of filtering photovoltaic array input dc power; Sample circuit 2 is used for DC input voitage detection, DC bus-bar voltage detection, alternating voltage detection, alternating current detection, network voltage detection, frequency detecting and phase-detection; BOOST booster circuit 3 is used for the photovoltaic array input voltage is brought up to the needed voltage of inversion; Direct current signal after inverter circuit 4 is used for boosting converts AC signal to; Relaying protection and leakage current detection circuit 5 is used for cutting off being connected with electrical network and is connected, detects leakage current; AC filter circuit 6 is used for giving electrical network after the alternating current filtering after the inversion output; PV voltage sample module: be used for the sampling of front end PV side voltage, judge whether the cell panel input voltage satisfies the machine service conditions; The MPPT module can dynamically be regulated output voltage, the current value of solar array, keeps the solar array power output to remain on maximum; The inversion driver module is used for the control signal of controller MCU is converted into the switching signal that can drive the inverter power pipe; Detection module is for detection of the current/voltage value that exchanges output, detection of grid voltage, mains frequency, phase place; Two MCU redundant manipulators are key control units of inverter, and it receives each input signal that detects sampling section, through after the calculation process, exports corresponding control signal, the normal operation of control each several part; LCD is used for showing in real time the state of runtime machine data that spread out of from control centre; Communication module is realized and the ancillary equipment communication, the RS485 of standard, 232, TCP/IP communication interface and communications protocol, and optional Wifi module can be monitored state of runtime machine in kinds of platform.
When the utility model uses, gather the photovoltaic array input voltage signal by the dc voltage sample circuit, PV voltage sample module is sent voltage signal into two MCU redundant manipulators, two MCU redundant manipulators judge relatively that by the MPPT module whether current input voltage is in machine normal working voltage scope, then two MCU redundant manipulators are controlled the BOOST booster circuit of inversion driver modules and then driving rear end, simultaneously two MCU redundant manipulator detection modules check BOOST booster circuits rear end busbar voltage as closed loop to the BOOST booster circuit conversion do feedback regulation, inverter circuit is converted to AC signal with direct current signal, corresponding testing circuit is to inverter output voltage simultaneously, the electric current comparison of sampling detects data and sends into two MCU redundant manipulators and follow the tracks of as current closed-loop.The utility model in the course of the work, for electrical network detection, island protect, overvoltage/undervoltage protection, cross underfrequency protection etc. and all carry out in real time, this inverter structure is simple, efficient, safety, stablely improved transformation efficiency, reduced thermal losses.

Claims (2)

1. solar energy power generating single-phase grid-connected inverter; it is characterized in that: it comprises the DC side filter circuit (1) that is electrically connected successively; sample circuit (2); BOOST booster circuit (3); inverter circuit (4); relaying protection and leakage current detection circuit (5) and AC filter circuit (6); it also comprises two MCU redundant manipulators and the PV voltage sample module that links to each other with two MCU redundant manipulators; the MPPT module; inversion driver module and detection module; PV voltage sample module links to each other with the output of sample circuit; the MPPT module links to each other with the input of BOOST booster circuit; inversion starts module and links to each other with the input of inverter circuit, and the output of detection module and relaying protection and leakage current detection circuit connects.
2. solar energy power generating single-phase grid-connected inverter according to claim 1, it is characterized in that: it also comprises LCD and the communication module that links to each other with two MCU redundant manipulators respectively.
CN2013202938262U 2013-05-27 2013-05-27 Solar photovoltaic power generation single-phase grid-connected inverter Expired - Fee Related CN203261257U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013202938262U CN203261257U (en) 2013-05-27 2013-05-27 Solar photovoltaic power generation single-phase grid-connected inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013202938262U CN203261257U (en) 2013-05-27 2013-05-27 Solar photovoltaic power generation single-phase grid-connected inverter

Publications (1)

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CN203261257U true CN203261257U (en) 2013-10-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375521A (en) * 2015-11-30 2016-03-02 苏州高创特新能源发展股份有限公司 Novel alternating current solar energy assembly capable of preventing hot spot
CN109980978A (en) * 2019-04-01 2019-07-05 安徽工业大学 A kind of converter and its modulator approach

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375521A (en) * 2015-11-30 2016-03-02 苏州高创特新能源发展股份有限公司 Novel alternating current solar energy assembly capable of preventing hot spot
CN109980978A (en) * 2019-04-01 2019-07-05 安徽工业大学 A kind of converter and its modulator approach
CN109980978B (en) * 2019-04-01 2020-05-05 安徽工业大学 Converter and modulation method thereof

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131030

Termination date: 20160527