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1. (WO2018058351) CONTROL SYSTEM AND PHOTOVOLTAIC SYSTEM AND MICRO-GRID USING THE SAME AND METHOD THEREOF

Pub. No.:    WO/2018/058351    International Application No.:    PCT/CN2016/100510
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Thu Sep 29 01:59:59 CEST 2016
IPC: H02J 3/38
G05F 1/67
Applicants: ABB SCHWEIZ AG
GE, Junjie
HUANG, Xing
XIE, Hailian
Inventors: GE, Junjie
HUANG, Xing
XIE, Hailian
Title: CONTROL SYSTEM AND PHOTOVOLTAIC SYSTEM AND MICRO-GRID USING THE SAME AND METHOD THEREOF
Abstract:
It provides control system and photovoltaic system and micro-grid using the same and method thereof. The control system for controlling a photovoltaic converter includes: a first input, for receiving first signals indicating first sampling values of an input current of the photovoltaic converter provided by a solar panel; a second input, for receiving second signals indicating second sampling values of an input voltage of the photovoltaic converter provided by the solar panel; a third input, for receiving third signals indicating third sampling values of an output voltage of the photovoltaic converter; and a controller, for first regulating the output voltage of the photovoltaic converter in a direction towards a reference voltage based on the third sampling value by regulating the input voltage by first voltage change of a first predetermined level; wherein: the controller is further adapted for monitoring a trend of the input voltage and power provided by the solar panel based on the first sampling values and the second sampling values for the previous sampling time points and the current sampling time point, and suspending the first regulation in case that the trend changes. This allows for an improvement of transient response of the control system and preventing possible overshooting of a lower input voltage even when the solar panel operating point is relatively far away from the MPP.