Power management apparatus, power management system and power management method

A power management system comprising:

• a manager configured to manage at least a utilization state of an electric storage apparatus;
• and
• a controller configured to execute a balance control of the electric storage apparatus such that a power of one or more facilities becomes close to a target power, wherein
• the controller is configured
• to compare a first effect and a second effect, the first effect being produced by operating the electric storage apparatus, the second effect being produced by not operating the electric storage apparatus, and
• not to execute the balance control in a case where the second effect is higher than the first effect, and to execute the balance control in a case where the first effect is higher than the second effect wherein the first effect is an incentive obtained by operating the electric storage apparatus, and the second effect is a deterioration cost avoided by not operating the electric storage apparatus.

A power management method, comprising:

• managing at least a utilization state of an electric storage apparatus;
• comparing a first effect and a second effect, the first effect being produced by operating the electric storage apparatus, the second effect being produced by not operating the electric storage apparatus;
• and
• not executing a balance control of the electric storage apparatus such that a power of one or more facilities becomes close to a target power, in a case where the second effect is higher than the first effect, and executing the balance control in a case where the first effect is higher than the second effect wherein the first effect is an incentive obtained by operating the electric storage apparatus, and the second effect is a deterioration cost avoided by not operating the electric storage apparatus.