CN103580066A - Seamless switching control system of distributed power generation system - Google Patents

Seamless switching control system of distributed power generation system Download PDF

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Publication number
CN103580066A
CN103580066A CN201210255797.0A CN201210255797A CN103580066A CN 103580066 A CN103580066 A CN 103580066A CN 201210255797 A CN201210255797 A CN 201210255797A CN 103580066 A CN103580066 A CN 103580066A
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China
Prior art keywords
unit
control
grid
seamless switching
signal output
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CN201210255797.0A
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Chinese (zh)
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杨忠芳
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杨忠芳
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Priority to CN201210255797.0A priority Critical patent/CN103580066A/en
Publication of CN103580066A publication Critical patent/CN103580066A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a seamless switching control system of a distributed power generation system, and belongs to the field of power generation systems. The seamless switching control system comprises a control mode switching unit and a working mode switching unit, the control mode switching unit is connected with the working mode switching unit through an inverter, the control mode switching unit comprises a voltage mode control unit and a current mode control unit, the working mode switching unit comprises a grid-connected operation unit and an independent operation unit, the signal input end of the control mode switching unit is connected with the signal output end of a DSP control unit, the signal output end of the DSP control unit is further connected with the signal input end of a grid-connected switch, and the signal output end of the grid-connected switch is connected with the signal input end of the working mode switching unit. According to the seamless switching control system, the mode seamless switching is achieved through the dual-mode inverter, grid-connected impact is removed, the power is accordingly saved, and the seamless switching control system can be used in the distributed power generation system.

Description

Distributed generation system seamless switching control system
Technical field
The present invention relates to a kind of electricity generation system, particularly a kind of distributed generation system.
Background technology
Along with comprising the development of the new-generation technology of the regenerative resources such as wind-powered electricity generation, photovoltaic, distributed generation system day by day becomes and meets load growth demand, reduces environmental pollution, improves a kind of effective way of comprehensive utilization rate of energy source and power supply reliability.Early stage grid-connected standard code is when electric power system fault, and distributed power generation must be out of service at once, and the operational mode that this has limited distributed power generation has weakened its advantage and potential.IEEE Std 1547-2003 has redefined isolated island, and isolated island is divided into expection isolated island and unexpected isolated island, shows that isolated island generator operation is that independent operation mode will become a new developing direction in distributed generation system research.For integrating the advantage of distributed power generation, reduce distributed power generation to the impact of electrical network and negative effect, give full play to its benefit and value, the proposition of especially micro-electrical network concept, the distributed generation system that makes to have independent and grid connected dual mode operated ability becomes critical problem and the research direction of micro-electrical network.In prior art there is the control mode switch being incorporated into the power networks with the switching of independent operating mode of operation and current-mode control and voltage-type control in the distributed generation system of working in double modes.Realizing the seamless switching of operational mode, reduce current/voltage and impact, is the key issue of double mode distributed generation technology.
Summary of the invention
The object of the invention is when in prior art, electric power system is broken down, distributed power generation must be out of service at once problem, a kind of distributed generation system seamless switching control system is provided, energy seamless switching while making electric power system be incorporated into the power networks with independent operating switching, thus the energy saved.
The object of the present invention is achieved like this: distributed generation system seamless switching control system, it is characterized in that, comprise through the connected control model converting unit of inverter and working mode change unit, described control model converting unit comprises voltage-type control unit and current-mode control unit, described working mode change unit comprises be incorporated into the power networks unit and stand-alone unit, the signal input part of described control model converting unit is connected with the signal output part of DSP control unit, the signal output part of the signal output part of described DSP control unit is also connected with the signal input part of grid-connected switch, the signal output part of described grid-connected switch is connected with the signal input part of working mode change unit.
Compared with prior art, beneficial effect of the present invention is: seamless switching theory points out that the voltage and the electric network voltage phase amplitude that need only in grid-connected front assurance system are consistent, grid-connected without impacting; But in actual applications, still there is rush of current in grid-connected (off-grid) process, even excessive owing to impacting, cannot realize grid-connected or cause the damage of system equipment.Traditional theory analysis and laboratory test are nearly all to carry out in the ideal case, cannot solve true operating problem, and the present invention has realized pattern seamless switching by double mode inverter, has eliminated grid-connected impact, thereby has saved electric energy.The present invention can be used for distributed generation system.
Accompanying drawing explanation
Fig. 1 is control principle block diagram of the present invention.
Embodiment
A kind of distributed generation system seamless switching control system as shown in Figure 1, comprise through the connected control model converting unit of inverter and working mode change unit, control model converting unit comprises voltage-type control unit and current-mode control unit, working mode change unit comprises be incorporated into the power networks unit and stand-alone unit, the signal input part of control model converting unit is connected with the signal output part of DSP control unit, the signal output part of the signal output part of DSP control unit is also connected with the signal input part of grid-connected switch, the signal output part of grid-connected switch is connected with the signal input part of working mode change unit.
Seamless switching theory points out that the voltage and the electric network voltage phase amplitude that need only in grid-connected front assurance system are consistent, grid-connected without impacting; But in actual applications, still there is rush of current in grid-connected (off-grid) process, even excessive owing to impacting, cannot realize grid-connected or cause the damage of system equipment.Traditional theory analysis and laboratory test are nearly all to carry out in the ideal case, cannot solve true operating problem, and the present invention has realized pattern seamless switching by double mode inverter, has eliminated grid-connected impact, thereby has saved electric energy.

Claims (1)

1. distributed generation system seamless switching control system, it is characterized in that, comprise through the connected control model converting unit of inverter and working mode change unit, described control model converting unit comprises voltage-type control unit and current-mode control unit, described working mode change unit comprises be incorporated into the power networks unit and stand-alone unit, the signal input part of described control model converting unit is connected with the signal output part of DSP control unit, the signal output part of the signal output part of described DSP control unit is also connected with the signal input part of grid-connected switch, the signal output part of described grid-connected switch is connected with the signal input part of working mode change unit.
CN201210255797.0A 2012-07-19 2012-07-19 Seamless switching control system of distributed power generation system Pending CN103580066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210255797.0A CN103580066A (en) 2012-07-19 2012-07-19 Seamless switching control system of distributed power generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210255797.0A CN103580066A (en) 2012-07-19 2012-07-19 Seamless switching control system of distributed power generation system

Publications (1)

Publication Number Publication Date
CN103580066A true CN103580066A (en) 2014-02-12

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CN201210255797.0A Pending CN103580066A (en) 2012-07-19 2012-07-19 Seamless switching control system of distributed power generation system

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CN (1) CN103580066A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058910A (en) * 2016-01-13 2016-10-26 万向钱潮股份有限公司 Energy storage inverter dual-mode seamless intelligent switching system and switching method
WO2017098366A1 (en) * 2015-12-09 2017-06-15 Thales Canada Inc. Seamless switchover system and method
EP3832831A4 (en) * 2018-07-27 2022-03-30 Nissin Electric Co Ltd Power supply system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017098366A1 (en) * 2015-12-09 2017-06-15 Thales Canada Inc. Seamless switchover system and method
CN106058910A (en) * 2016-01-13 2016-10-26 万向钱潮股份有限公司 Energy storage inverter dual-mode seamless intelligent switching system and switching method
EP3832831A4 (en) * 2018-07-27 2022-03-30 Nissin Electric Co Ltd Power supply system

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Application publication date: 20140212

C02 Deemed withdrawal of patent application after publication (patent law 2001)