Storage battery system
First Claim
1. A storage battery system for which N (N≥
- 2) power conditioning systems are connected to a power system and a storage battery module group formed by connecting one or more storage battery modules in parallel is connected to each of the N power conditioning systems, and which is operated on a basis of a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising;
battery management units that monitor a state of the storage battery module group; and
a controller that receives the charge/discharge request and storage battery information supplied from the battery management units, and controls the N power conditioning systems on the basis of the charge/discharge request and the storage battery information, wherein the power conditioning system has a function of converting AC power of the power system to DC power and charging the DC power to the storage battery module group, and a function of converting the DC power of the storage battery module group to the AC power and discharging the AC power to the power system,wherein a maximum power storage capacity of the storage battery modules configuring at least one storage battery module group is different from a maximum power storage capacity of the storage battery modules configuring the other storage battery module groups, andwherein the controller includes a charge/discharge command unit that determines a charge/discharge amount of each of the N power conditioning systems so as to satisfy a relational expression (1) below;
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Accused Products
Abstract
A storage battery system relating to the present invention includes N PCSes. Each of the N PCSes is connected to an individual storage battery module group. The storage battery module group is formed by connecting one or more storage battery modules in parallel. A maximum power storage capacity of the storage battery modules configuring at least one storage battery module group is different from a maximum power storage capacity of the storage battery modules configuring the other storage battery module groups. A controller determines charge/discharge amounts of the individual PCSes on the basis of a charge/discharge request from an EMS, the maximum power storage capacity of the storage battery module, the number of the storage battery modules and a storage battery capacity ratio.
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Citations
1 Claim
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1. A storage battery system for which N (N≥
- 2) power conditioning systems are connected to a power system and a storage battery module group formed by connecting one or more storage battery modules in parallel is connected to each of the N power conditioning systems, and which is operated on a basis of a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising;
battery management units that monitor a state of the storage battery module group; and a controller that receives the charge/discharge request and storage battery information supplied from the battery management units, and controls the N power conditioning systems on the basis of the charge/discharge request and the storage battery information, wherein the power conditioning system has a function of converting AC power of the power system to DC power and charging the DC power to the storage battery module group, and a function of converting the DC power of the storage battery module group to the AC power and discharging the AC power to the power system, wherein a maximum power storage capacity of the storage battery modules configuring at least one storage battery module group is different from a maximum power storage capacity of the storage battery modules configuring the other storage battery module groups, and wherein the controller includes a charge/discharge command unit that determines a charge/discharge amount of each of the N power conditioning systems so as to satisfy a relational expression (1) below;
- 2) power conditioning systems are connected to a power system and a storage battery module group formed by connecting one or more storage battery modules in parallel is connected to each of the N power conditioning systems, and which is operated on a basis of a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising;
Specification