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1. WO2020115284 - METHODS OF STARTING AN INVERTER SYSTEM, AND INVERTER SYSTEMS

Publication Number WO/2020/115284
Publication Date 11.06.2020
International Application No. PCT/EP2019/084002
International Filing Date 06.12.2019
IPC
H02M 7/537 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
53using devices of a triode or transistor type requiring continuous application of a control signal
537using semiconductor devices only, e.g. single switched pulse inverters
H02M 7/5387 2007.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
53using devices of a triode or transistor type requiring continuous application of a control signal
537using semiconductor devices only, e.g. single switched pulse inverters
5387in a bridge configuration
H02M 7/487 2007.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
483Converters with outputs that each can have more than two voltage levels
487Neutral point clamped inverters
H02M 1/32 2007.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
32Means for protecting converters other than by automatic disconnection
H02M 1/36 2007.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
36Means for starting or stopping converters
H02J 3/38 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
3Circuit arrangements for ac mains or ac distribution networks
38Arrangements for parallelly feeding a single network by two or more generators, converters, or transformers
CPC
H02J 2300/24
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
2300Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
20The dispersed energy generation being of renewable origin
22The renewable source being solar energy
24of photovoltaic origin
H02J 3/381
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
3Circuit arrangements for ac mains or ac distribution networks
38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
381Dispersed generators
H02J 3/40
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
3Circuit arrangements for ac mains or ac distribution networks
38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
40Synchronising a generator for connection to a network or to another generator
H02M 1/32
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
32Means for protecting converters other than automatic disconnection
H02M 1/36
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
36Means for starting or stopping converters
H02M 7/487
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42Conversion of dc power input into ac power output without possibility of reversal
44by static converters
48using discharge tubes with control electrode or semiconductor devices with control electrode
483Converters with outputs that each can have more than two voltages levels
487Neutral point clamped inverters
Applicants
  • GE ENERGY POWER CONVERSION TECHNOLOGY LTD [GB]/[GB]
Inventors
  • GLOES, Hendrik
  • GESKE, Martin
  • BRÜCKNER, Thomas
Agents
  • SERJEANTS LLP
Priority Data
18211113.807.12.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS OF STARTING AN INVERTER SYSTEM, AND INVERTER SYSTEMS
(FR) PROCÉDÉ DESTINÉ À DÉMARRER UN SYSTÈME D’ONDULEUR, ET SYSTÈMES D’ONDULEURS
Abstract
(EN)
An inverter system (1) is described. The inverter system (1) includes a DC power source such as a plurality of photovoltaic (PV) panels (8), an inverter (2) and a controller (32). The inverter (2) includes a plurality of semiconductor devices (e.g., controllable semiconductor switches such as IGBTs and anti-parallel connected diodes) arranged in a suitable inverter topology. The inverter (2) includes DC input terminals (4) connected to the PV panels (8) by means of a DC link (10) and at least one AC output terminal (6). When starting the inverter (2), the controller (32) is configured to enable a short circuit state of the inverter (2) by controlling the semiconductor switches to create a short circuit between the DC input terminals (4) such that the inverter (2) carries a current substantially equal to the short circuit current of the PV panels (8). This short circuit current may be used to pre-heat the semiconductor devices of the inverter (2) to reduce failure rates caused by cosmic radiation when the semiconductor devices subsequently experience high blocking voltages during normal operation of the inverter.
(FR)
L’invention concerne un système d’onduleur (1). Le système d’onduleur (1) inclut une source d’énergie en CC telle qu’une pluralité de panneaux photovoltaïques (PV) (8), un onduleur (2) et un contrôleur (32). L’onduleur (2) inclut une pluralité de dispositifs semi-conducteurs (par ex., des commutateurs semi-conducteurs commandables tels que des IGBT et des diodes connectées de manière antiparallèle) agencés dans une topologie d’onduleur convenable. L’onduleur (2) inclut des bornes d’entrée en CC (4) connectées aux panneaux PV (8) au moyen d’une liaison en CC (10) et au moins une borne de sortie en CA (6). Lorsqu’on démarre l’onduleur (2), le contrôleur (32) est configuré pour activer un état de court-circuit de l’onduleur (2) en commandant les commutateurs semi-conducteurs pour créer un court-circuit entre les bornes d’entrée en CC (4) de sorte que l’onduleur (2) porte un courant sensiblement égal au courant de court-circuit des panneaux PV (8). Ce courant de court-circuit peut servir à préchauffer les dispositifs semi-conducteurs de l’onduleur (2) pour réduire le taux de pannes causé par le rayonnement cosmique lorsque les dispositifs semi-conducteurs sont ensuite soumis à de hautes tensions de blocage durant le fonctionnement normal de l’onduleur.
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