US 10,566,803 B2Granted

Virtual power plant

AssigneeSiemens Aktiengesellschaft

InventorsChristopher Betzin, Matthias Simon Lepiorz, Holger Wolfschmidt

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Abstract

The teachings of the present disclosure may be employed for buffering electric power in a virtual storage power plant. For example, a virtual power plant for buffering electric power may include: distributed electrical energy storage systems electrically interconnected by transmission lines of an electrical power plant network; a measuring device detecting a state of charge of each of the storage systems; and a control device adjusting the states of charge between a lower limit and an upper limit. The states of charge are adjusted as needed by means of a charge equalization including transmitting electrical equalization charges from energy storage systems having a relatively high state of charge to energy storage systems having a relatively low state of charge, via the electrical power plant network.

Claims20

Dependent claims

A virtual power plant for buffering electric power for electrical loads, the virtual power plant comprising:

a plurality of spatially distributed electrical energy storage systems electrically interconnected by transmission lines of an electrical power plant network;
a measuring device detecting a respective state of charge of each of the plurality of electrical energy storage systems, the state of charge of each respective electrical energy storage system representing a percentage charge of a maximum charge value of the respective electrical energy storage system;
and
a control device programmed to identify, from the plurality of electrical energy storage systems, individual electrical energy storage systems have a state of charge to be balanced;
the control device programmed to determine a measure of loading for each of the plurality of transmission lines;
the control device programmed to identify a subset of the plurality of transmission lines having a lower measure of loading relative to other ones of the transmission lines;
and
the control device programmed to adjust each state of charge of the identified individual electrical energy storage systems having a state of charge to be balanced by transmitting, via the identified subset of transmission lines having a lower measure of loading, electrical equalization charges from individual energy storage systems having a relatively high state of charge to individual energy storage systems having a relatively low state of charge.

5 more elements

A method for buffering of electric power for electrical loads, including a plurality of spatially distributed electrical energy storage systems electrically interconnected by a plurality of transmission lines of an electrical power plant network, the method comprising:

detecting the states of charge of each of the energy storage systems, the state of charge of each respective electrical energy storage system representing a percentage charge of a maximum charge value of the respective electrical energy storage system;
identifying, from the plurality of electrical energy storages, individual electrical energy storage systems having a state of charge to be balanced;
determining a measure of loading for each of the plurality of transmission lines;
identifying a subset of the plurality of transmission lines having a lower measure of loading relative to other ones of the transmission lines;
adjusting the individual states of charge of the identified individual electrical energy storage systems having a state of charge to be balanced by transmitting, via the identified subset of transmission lines having a lower measure of loading, electrical equalization charges from individual energy storage systems having a relatively high state of charge to individual energy storage systems having a relatively low state of charge.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/540,781Filed 9 Dec 2015
Priority: DE 10 2015 200 56915 Jan 2015
Published: US 2017/0373509 A128 Dec 2017
Granted: 18 Feb 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02J 3/32
Arrangements for balancing of the load in networks by storage of energy: using batteries or super capacitors with converting means
G05B 15/02
Systems controlled by a computer: electric
H02J 3/28
Circuit arrangements for AC mains or AC distribution networks: arrangements for balancing of the load in networks by storage of energy
H02J 7/52
Acting upon multiple batteries simultaneously or sequentially: for charge balancing, e.g. equalisation of charge between batteries