CN105720600A - Novel multifunctional micro power grid inverter and control method thereof - Google Patents
Novel multifunctional micro power grid inverter and control method thereof Download PDFInfo
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- CN105720600A CN105720600A CN201510676913.XA CN201510676913A CN105720600A CN 105720600 A CN105720600 A CN 105720600A CN 201510676913 A CN201510676913 A CN 201510676913A CN 105720600 A CN105720600 A CN 105720600A
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- inverter
- photovoltaic
- battery
- grid
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a novel multifunctional micro power grid inverter and a control method thereof. The inverter is composed of two boost circuits (DC/DC), a DC/AC circuit, two power switch elements and a DSP (digital signal processor) controller and a sampling circuit. A grid-connected inversion function of photovoltaic input and a grid-connected inversion function of battery pack input can be completed. The inverter provided by the invention can select photovoltaic access or no photovoltaic access, power of the inverter realizes unidirectional flow, i.e., from inversion input to a power grid, and the inverter also has the function of intelligently selecting and identifying whether input is the photovoltaic input or the battery pack input and the function of input battery protection. The multifunctional inverter provided by the invention can realize a currently widely applied photovoltaic grid-connected generating strategy, can also be compatible with grid-connected inversion of an energy storage battery, has an automatic switching function and realizes an optimal strategy of economical power consumption. During high peaks of power consumption in the night, energy support is provided for the load of the power grid and a micro power grid, and electricity bills of users are decreased.
Description
Technical field
Patent of the present invention relates to a kind of multi-functional intelligent multifunctional microgrid inverter, belongs to electrical engineering field.
Background technology
The intermittence of photovoltaic generation and randomness, cause that power network safety operation can be brought impact by new forms of energy large-scale development, and the micro-capacitance sensor inversion transformation technique with energy storage link be the key solving this problem.And the application of micro-capacitance sensor inversion can not only alleviate the impact that new energy power generation grid-connection is brought, and for solving owing to user power utilization is accustomed to the peak valley problem of the power system brought.At present, adopt in conjunction with the two-way inversion such as photovoltaic, set of cells highly integrated mixing inversion system for energy storage inverter application more, when a certain link is damaged, can cause that whole system is paralysed.
Summary of the invention
The present invention is a kind of intelligent multifunctional microgrid inverter, and input can be photovoltaic generation widely used at present, also can for be configured with the energy-storage battery group that peak load shifting energy-storage system is used.This inverter can have two-way to input, respectively accessible photovoltaic and set of cells, by Intelligent Measurement, Selection utilization photovoltaic generation or energy storing and electricity generating.Patent inversion of the present invention is by two groups of booster circuits (DC/DC), one group of DC/AC circuit, two power switch components and DSP(digital signal processor) controller and sample circuit composition.The parallel network reverse function of photovoltaic input and the parallel network reverse function of set of cells input can be completed.DSP(digital signal processor) controller is for setting operation time of energy storage inversion.Controller is by obtaining the voltage signal of input energy-storage battery, and controller possesses the under-voltage protection of battery, when battery is without electricity, stops the parallel network reverse of energy-storage battery.
User is selectable as photovoltaic combining inverter or energy storage combining inverter.And possess automatic switching function, it is achieved the optimal strategy of electricity consumption.In the peak of power consumption at night, provide energy to support for electrical network, reduce the electricity charge for user.Peak load shifting system and photovoltaic generation for promoting user side are significant, and improve the economic well-being of workers and staff of user.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, patent of the present invention is further illustrated.
Fig. 1 is the main circuit principle assumption diagram of patent of the present invention.1.IGBT, MOS switch pipe or power relay, 2. DC boosting module, 3. inverter circuit, 4. electrical network, 5. dc-link capacitance in figure.
Fig. 2 is the circuit theory control block diagram of patent of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific implementation process, patent of the present invention is described in further detail:
As shown in Figure 1: the multi-functional microgrid inverter input of patent of the present invention is divided into two-way, photovoltaic input and battery input, input connects switch element (1) respectively, switch element (1) terminates (2) DC/DC booster circuit afterwards, can be isolation design or non-isolated design, two-way boost module (2) is parallel to dc-link capacitance (5), after dc-link capacitance (5) voltage stabilizing, rear termination (3) DC/AC inverter circuit, this inverter circuit can monophase system or three-phase system, and inverter circuit is grid type.
As shown in Figure 2, control circuit is dsp controller and sampling section completes, wherein DSP(digital signal processor for the control part of patent of the present invention) controller is made up of dsp chip and clock circuit.Sample circuit obtains input power and the voltage of inverter side, current signal, through the process of dsp controller, detects when photovoltaic module generates electricity, with grid-connected preferentially.Peak Elapsed Time section is set by the clock chip of controller, automatically when electricity price is higher, carries out the parallel network reverse of energy-storage battery.It addition, detecting that voltage on line side is relatively low, intelligent decision current state is peak of power consumption, starts the parallel network reverse of energy-storage battery.Controller obtains the voltage signal of input energy-storage battery by sample circuit, possesses the under-voltage protection of battery, when battery is without electricity, stops the parallel network reverse of energy-storage battery.Controller detection input and the voltage of output, current signal, control switch to input and be controlled, and the input selecting parallel network reverse is energy-storage battery or photovoltaic.
Claims (5)
1. a Multifunction microgrid inverter, by two groups of booster circuits (DC/DC), one group of DC/AC circuit, two power switch components and DSP(digital signal processor) controller and sample circuit composition, can complete photovoltaic input parallel network reverse function and set of cells input parallel network reverse function.
2. sample circuit according to claim 1, is characterized in that: the signal of sampling is the voltage and current signal of two-way input, to identify that input source is for set of cells or photovoltaic module.
3. dsp controller is made up of DSP and clock circuit according to claim 1; for setting the operation time of battery energy storage inversion, controller is by obtaining the voltage signal of input energy-storage battery, and controller possesses the under-voltage protection of battery; when battery is without electricity, stop the parallel network reverse of energy-storage battery.
4. DC/AC circuit according to claim 1, can be single-phase or three-phase inversion system；For single-phase inversion system, the input range of Multifunctional inverter: battery input range is (24V ~ 400V), photovoltaic input range is 100V ~ 550V；For three-phase system, input range: battery input range is (1500V ~ 800V), photovoltaic input range is 150V ~ 900V.
5. Multifunction microgrid inverter according to claim 1, it is possible to selecting access photovoltaic or do not access photovoltaic, inverter power direction is one-way flow, it may be assumed that be input to electrical network from inversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676913.XA CN105720600A (en) | 2015-10-20 | 2015-10-20 | Novel multifunctional micro power grid inverter and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676913.XA CN105720600A (en) | 2015-10-20 | 2015-10-20 | Novel multifunctional micro power grid inverter and control method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN105720600A true CN105720600A (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676913.XA Pending CN105720600A (en) | 2015-10-20 | 2015-10-20 | Novel multifunctional micro power grid inverter and control method thereof |
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| CN (1) | CN105720600A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112777A (en) * | 2019-05-13 | 2019-08-09 | 无锡清盛电力电子有限公司 | Adaptive approach, device and the electric energy router of photovoltaic and energy storage input |
| CN110856309A (en) * | 2019-11-22 | 2020-02-28 | 安徽乐图电子科技有限公司 | Multi-path LED driving circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202495775U (en) * | 2012-03-13 | 2012-10-17 | 毛振刚 | Solar energy photovoltaic grid-connected power generation system |
| CN104734326A (en) * | 2013-12-19 | 2015-06-24 | 湖北歌润新能源有限责任公司 | Solar power supply and mains supply complementary usage regulation and control device |
| CN104810858A (en) * | 2015-05-27 | 2015-07-29 | 广西大学 | Control method for grid-connected power generation system of optical storage microgrid |
| WO2015157600A1 (en) * | 2014-04-11 | 2015-10-15 | Primus Power Corporation | Series-connected storage interface and power converter |
-
2015
- 2015-10-20 CN CN201510676913.XA patent/CN105720600A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202495775U (en) * | 2012-03-13 | 2012-10-17 | 毛振刚 | Solar energy photovoltaic grid-connected power generation system |
| CN104734326A (en) * | 2013-12-19 | 2015-06-24 | 湖北歌润新能源有限责任公司 | Solar power supply and mains supply complementary usage regulation and control device |
| WO2015157600A1 (en) * | 2014-04-11 | 2015-10-15 | Primus Power Corporation | Series-connected storage interface and power converter |
| CN104810858A (en) * | 2015-05-27 | 2015-07-29 | 广西大学 | Control method for grid-connected power generation system of optical storage microgrid |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112777A (en) * | 2019-05-13 | 2019-08-09 | 无锡清盛电力电子有限公司 | Adaptive approach, device and the electric energy router of photovoltaic and energy storage input |
| CN110856309A (en) * | 2019-11-22 | 2020-02-28 | 安徽乐图电子科技有限公司 | Multi-path LED driving circuit |
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Application publication date: 20160629 |
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