Stability Control of Energy Storage Voltage Source Inverters in Isolated Power Systems

Jian Hu; Lijun Fu

Stability Control of Energy Storage Voltage Source Inverters in Isolated Power Systems

Jian Hu

Lijun Fu

Vol. 18, No. 6, pp. 1844-1854, Nov. 2018

10.6113/JPE.2018.18.6.1844

Active damping

Double closed-loop control

Energy-storage power sources

Stability

Voltage source inverter

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Abstract

Isolated power systems (IPS) are often characterized by a weak grid due to small power grids. The grid side voltage is no longer equivalent to an ideal voltage source of an infinitely big power grid. The conversion control of new energy sources, parameter perturbations as well as the load itself can easily cause the system voltage to oscillate or to become unstable. To solve this problem, increasing the energy-storage power sources is usually used to improve the reliability of a system. In order to provide support for the voltage, the energy-storage power source inverter needs an method to control the voltage source. Therefore, this paper has proposed the active damping control of a voltage source inverter (VSI) based on virtual compensation. By simplifying the VSI double closed-loop control, two feedback compensation channels have been constructed to reduce the VSI output impedance without changing the characteristics of the voltage gain of a system. This improvement allows systems to operate stably in a larger range. A frequency-domain analysis, and simulation and experimental results demonstrate the feasibility and effectiveness of the proposed method.

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Cite this article

[IEEE Style]

J. Hu and L. Fu, "Stability Control of Energy Storage Voltage Source Inverters in Isolated Power Systems," Journal of Power Electronics, vol. 18, no. 6, pp. 1844-1854, 2018. DOI: 10.6113/JPE.2018.18.6.1844.

[ACM Style]

Jian Hu and Lijun Fu. 2018. Stability Control of Energy Storage Voltage Source Inverters in Isolated Power Systems. Journal of Power Electronics, 18, 6, (2018), 1844-1854. DOI: 10.6113/JPE.2018.18.6.1844.