This invention discloses a load balancing control method and
system for photovoltaic
energy storage charging stations, comprising: determining the average load power, load deviation value, and
station power deficit value based on the
branch load power of each charging
branch; determining the lifetime
loss weight based on the
state of charge, cluster temperature, cluster
internal resistance, and cumulative flux of each
energy storage cluster; determining the power allocation interval corresponding to each
energy storage cluster based on the lifetime
loss weight and instantaneous power adjustment margin, and forming a
branch compensation sequence; subsequently performing
power compensation on each charging branch in sequence to obtain the target
power sharing result for each energy storage cluster corresponding to each charging branch; and finally, performing coordinated control on each energy storage cluster and each charging branch based on the target
power sharing result. This invention can balance both the
station load balance and the lifetime balance of energy storage clusters.