Abstract:
The invention relates to a photovoltaic system for generating an output voltage which is essentially uninfluenced by varying irradiation, the photovoltaic system comprising a photovoltaic source (1) having an input terminal (2) and an output terminal (3). The photovoltaic system is characterized in that the photovoltaic system comprises a voltage adding arrangement (4) comprising a first input terminal (5) and an output terminal (6), the voltage adding arrangement (4) is connected in series with the photovoltaic source (1), and in that a first route (7) comprising a voltage source (9) and a second route (8) constituting a voltage source bypass extend between said first input terminal (5) and said output terminal (6) of the voltage adding arrangement (4), said first and second routes being alternately activateable.
Abstract:
The present invention is concerned with electrical power distribution. A distributed energy source 32 is adapted to transmit its actual power generation to the power grid 14. Dependent on the load state and the power generation, the charging power of a battery 18 of an electrical vehicle 12b is constrained such that not more than the actual available power from the distributed energy source 32 is withdrawn from the power grid 14.
Abstract:
A modular energy storage device (1, 40) for a high voltage electrical power system is provided comprising at least two modules (3a-c, 4a-c) connected in series, each module (3a-c, 4a-c) including at least one dc power-source unit (5) enclosed in a container (7) and a positive (9a, 10a) and a negative (9b, 10b) terminal, and the device further comprising a positive (12) and a negative (11) pole, a first (14, 30) and a second (17) conductor arranged to form a current path between the positive (9a, 10a) and negative (9b, 10b) poles, the first conductor (14, 30) including a plurality of conductor parts (23) connected to the terminals (9a-b, 10a-b) of the modules (3a-c, 4a-c) to provide a series connection of the modules (3a-c, 4a-c), a first module (3a, 3c, 4a, 4c) of the series connection of the modules (3a-c, 4a-c) being connected to one of the poles (11-12), and the second conductor (17) is connected between a last module (3c, 3a, 4c, 4a) in the series connection of modules (3a-c, 4a-c) and the other pole (11-12), wherein the first (14, 30) and second (17) conductors are arranged to pass through the containers (7) in parallel such that a current flows through the first conductor (14, 30) in a first direction and through the second conductor (17) in a second direction opposite to the first direction.
Abstract:
A modular energy storage device (1, 40) for a high voltage electrical power system is provided comprising at least two modules (3a-c, 4a-c) connected in series, each module (3a-c, 4a-c) including at least one dc power-source unit (5) enclosed in a container (7) and a positive (9a, 10a) and a negative (9b, 10b) terminal, and the device further comprising a positive (12) and a negative (11) pole, a first (14, 30) and a second (17) conductor arranged to form a current path between the positive (9a, 10a) and negative (9b, 10b) poles, the first conductor (14, 30) including a plurality of conductor parts (23) connected to the terminals (9a-b, 10a-b) of the modules (3a-c, 4a-c) to provide a series connection of the modules (3a-c, 4a-c), a first module (3a, 3c, 4a, 4c) of the series connection of the modules (3a-c, 4a-c) being connected to one of the poles (11-12), and the second conductor (17) is connected between a last module (3c, 3a, 4c, 4a) in the series connection of modules (3a-c, 4a-c) and the other pole (11-12), wherein the first (14, 30) and second (17) conductors are arranged to pass through the containers (7) in parallel such that a current flows through the first conductor (14, 30) in a first direction and through the second conductor (17) in a second direction opposite to the first direction.
Abstract:
The invention relates to a photovoltaic system for generating an output voltage which is essentially uninfluenced by varying irradiation, the photovoltaic system comprising at least one photovoltaic unit (1) comprising two photovoltaic sources (2, 2'), each comprising an input terminal (3, 3') and an output terminal (4, 4'). The invention is characterized in that the photovoltaic unit (1) comprises two voltage adding arrangements (5, 5'), each having a first route (13) comprising a voltage source (15) and a second route (14) constituting a voltage source bypass, the first voltage adding arrangement (5) is connected in series with the first photovoltaic source (2) and the second voltage adding arrangement (5') is connected in series with the second photovoltaic source (2'), and a switch (12) is arranged between an input terminal (3) of the first photovoltaic source (2) and an output terminal (4') of the second photovoltaic source (2'), and in addition the input terminals (8, 10) of the photovoltaic unit (1) constituting the external interface of the photovoltaic system are interconnected and the output terminals (9, 11) of the photovoltaic unit (1) constituting the external interface of the photovoltaic system are interconnected.