Method, device and system for model direct power predictive control

A power prediction and direct technology, applied in the direction of output power conversion device, circuit device, AC power input conversion to DC power output, etc., can solve the problem that the common mode current of photovoltaic grid-connected inverter cannot be effectively suppressed, and achieve low Common mode current, flexible control, and the effect of suppressing common mode current
CN105897029BActive Publication Date: 2018-06-08GOODWE TECHNOLOGIES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GOODWE TECHNOLOGIES CO LTD
Publication Date
2018-06-08

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Abstract

The invention discloses a model direct power prediction control method, device and system, which belong to the technical field of photovoltaic power generation conversion control. The method includes: obtaining the output voltage uout, common-mode voltage ucm and each Correspondence between a group of switch state combinations; calculate the value of the objective function g(k+1) of the model direct power predictive control corresponding to each group of switch state combinations; calculate the value of the objective function g(k+1) The minimum value gop(k+1) of the minimum value gop(k+1); obtain the switch state combination corresponding to the minimum value gop(k+1), and realize the low common mode current model direct power predictive control of the single-phase photovoltaic grid-connected inverter. The invention can flexibly control the active power and reactive power of the inverter, has good static and dynamic performance, and can effectively suppress the common-mode current of the single-phase photovoltaic grid-connected inverter.
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Description

technical field

[0001] The invention relates to the technical field of photovoltaic power generation conversion control technology, in particular to a model direct power predictive control method, device and system. Background technique

[0002] In recent years, renewable energy sources such as solar energy, wind energy, and bioenergy have been paid more and more attention by governments of various countries and developed rapidly. As a renewable energy source with great potential, solar energy has been widely used in recent years.

[0003] Photovoltaic grid-connected inverter, as the bridge connecting the distributed generation system and the grid, is the core of the distributed generation system. The performance of photovoltaic grid-connected inverter directly affects the performance of the entire distributed generation system. For the control of single-phase photovoltaic grid-connected inverters, there are currently quasi-resonant control in the stationary coordinate sys...

Claims

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