The reverse power flow in a distribution feeder results in voltage reduction as well as conventional voltage rise. An advanced design consideration for distribution systems with a large-capacity PV system is required, and this will be explored in our future work. We would like to thank Editage () for English language editing.
The PV output power reverses in the daytime so that the active power at the substation flows in the reverse direction. Consequently, the voltage at the PV system is larger than the voltage at the substation during the daytime. Fig. 2. Time variation of active power and voltage in feeder A.
Because the phase angle φ decreases with the increase in the leading reactive power generation at the receiving-end, the power factor control of the PV system that regulates the voltage rise due to reverse power flow , may lead to an excessive receiving-end voltage reduction.
In addition, in , to prevent overvoltage problems in power distribution networks, the use of the battery has an important role and three various scenarios for grid conditions, are tested as the voltage control mode, mitigating reverse power flow mode, and scheduling mode.
PV inverter can positively contribute to feeder voltage control for high PV penetration and result in an improved voltage profile. PV inverter can displace all voltage control devices on a grid system at a very high penetration .
For distribution networks with increasing PV integration, a local voltage regulation approach is suggested in . A very short-term solar generation forecast, a medium intelligent PV inverter, and a reduction of the AP are reported as forecast techniques.