Abb Schweiz Ag

Abb Technology Ltd

Hitachi Energy Switzerland Ag

Michal Lazarczyk

Jyoti Sastry

RongRong Yu

Oscar Apeldoorn

James Ottewill

Michal Orkisz

Wojciech Piasecki

Mats Hyttinen

Roberto Alves

Sara Ahmed

Panagiotis Bakas

Antonis Marinopoulos

Kailash Srivastava

Hongbo Jiang

Marcin Szewczyk

Radoslaw Jez

Mohamed Eissa

Pawel Dawidowski

Dimitrios Doukas

Radoslaw Nalepa

Göran Brorsson

The invention relates to a method and apparatus for monitoring the condition of subsystems within a renewable generation plant or microgrid which are using Supervisory Control and Data Acquisition (SCADA) systems for allowing plant operators to monitor and interact with a plant via human machine interfaces.

Method and apparatus for monitoring the condition of subsystems within a renewable generation plant or microgrid

Embodiments are generally based on employing a power transmission line in a HVDC link to provide auxiliary power to one of the ends of the HVDC link for facilitating a black start thereof when the HVDC link is de-energized, i.e. when at least one of the HVDC converter stations is de-energized and there is no transmission of power between inverter and rectifier HVDC converter stations on each side of the HVDC link. A relatively small amount of power can be conveyed towards one of the HVDC converter stations via the power transmission line so as to provide power to any auxiliary system(s) of the converter station, for example prior to a black start of the converter station being carried out.

Power transmission arrangement and method for operating a power transmission arrangement

A solar power plant including a power conversion system and a method of controlling the power conversion system. Implemented in a DC/AC inverter, the plant includes photovoltaic modules (PV modules) arranged in arrays connected to a respective DC/DC converters. A power collecting grid interfaces between the DC/DC converters and the DC/AC inverter. The method includes monitoring the performance of each PV array by adjusting the voltage level of each interface between a PV array and the corresponding DC/DC converter, and includes monitoring the output power of each DC/DC converter as a feedback for the regulating.

Method of controlling a solar power plant, a power conversion system, a DC/AC inverter and a solar power plant

It is presented a DC/DC converter for converting power between a first DC connection comprising a first positive terminal and a first negative terminal, and a second DC connection comprising a second positive terminal and a second negative terminal. The DC/DC converter comprises: a first multilevel converter and a second multilevel converter connected serially between the first positive terminal and the first negative terminal, wherein the second positive terminal is connected to a point between the first multilevel converter and the second multilevel converter; and a first filter connected between an AC terminal of the first multilevel converter and an AC terminal of the second multilevel converter, wherein the first filter comprises a capacitor and an inductor.

DC/DC converter

Growing community of inventors

Cracow, Poland

Michal Lazarczyk