TY - JOUR
T1 - Bounded Universal Droop Control to Enable the Operation of Power Inverters Under Some Abnormal Conditions and Maintain Voltage and Frequency Within Predetermined Ranges
AU - Dong, Yiting
AU - Ren, Beibei
AU - Zhong, Qing Chang
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - The universal droop control (UDC) can be applied to power inverters having an impedance angle between -π/2 and π/2 rad to achieve voltage and frequency regulation and accurate proportional power sharing without the need of knowing the type or value of impedance. However, there is an increasing need for voltage and frequency regulation within predetermined ranges even under some abnormal conditions, such as overloading, sensor faults, and large set-point changes. In this article, a bounded nonlinear dynamics is introduced into the UDC to ensure that the voltage and frequency can always stay within predetermined ranges under normal and some abnormal conditions, up to hardware limits when current protection needs to be triggered. As a result, the proposed controller can extend the operational range of power inverters in terms of voltage and frequency regulation to cover different scenarios. More importantly, the ranges for both voltage and frequency can be chosen independently from each other. Since the original structure of the UDC is kept in the proposed controller, the properties of the UDC, such as without the need of knowing the type or value of impedance, are well maintained. The closed-loop stability of the system is established via the Lyapunov method. Extensive simulation and experimental results are presented to validate the effectiveness of the proposed controller.
AB - The universal droop control (UDC) can be applied to power inverters having an impedance angle between -π/2 and π/2 rad to achieve voltage and frequency regulation and accurate proportional power sharing without the need of knowing the type or value of impedance. However, there is an increasing need for voltage and frequency regulation within predetermined ranges even under some abnormal conditions, such as overloading, sensor faults, and large set-point changes. In this article, a bounded nonlinear dynamics is introduced into the UDC to ensure that the voltage and frequency can always stay within predetermined ranges under normal and some abnormal conditions, up to hardware limits when current protection needs to be triggered. As a result, the proposed controller can extend the operational range of power inverters in terms of voltage and frequency regulation to cover different scenarios. More importantly, the ranges for both voltage and frequency can be chosen independently from each other. Since the original structure of the UDC is kept in the proposed controller, the properties of the UDC, such as without the need of knowing the type or value of impedance, are well maintained. The closed-loop stability of the system is established via the Lyapunov method. Extensive simulation and experimental results are presented to validate the effectiveness of the proposed controller.
KW - Bounded control
KW - bounded universal droop control (BUDC)
KW - droop control
KW - universal droop control (UDC)
UR - http://www.scopus.com/inward/record.url?scp=85118983247&partnerID=8YFLogxK
U2 - 10.1109/TIE.2021.3125660
DO - 10.1109/TIE.2021.3125660
M3 - Article
AN - SCOPUS:85118983247
SN - 0278-0046
VL - 69
SP - 11633
EP - 11643
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 11
ER -