Nonlinear Control Method of Superconducting Energy Storage considering Voltage Imbalance in Distribution Network

Abstract

A new nonlinear control approach of superconducting energy storage is devised under the condition of addressing the voltage imbalance of the distribution network in order to obtain more precise control of superconducting energy storage devices (SMEs). The model of the superconducting energy storage device is built on the basis of determining the voltage imbalance signal of the distribution network. Aiming at the situation that the voltage of the device will change at the same time when the structure of the device changes, a nonlinear controller is designed to estimate the discontinuous interference state of the nonlinear controller device and combined with the nonlinear control algorithm to realize the nonlinear control of superconducting energy storage. The simulation test results demonstrate that the design method can accomplish a more accurate signal tracking cut and that switching voltage generation estimation is performed well. It shows that the design method can meet the actual nonlinear control requirements of a superconducting energy storage device.

Stability Analysis of Two-Area LFC Power Systems With Two Additive Interval Time-Varying Delays

“…At the same time, the load disturbance is modeled as a bounded uncertainty parameter, and a new inequality technique is used to further reduce the conservatism of the stability criteria for the LFC power systems with time-varying delays [27]. In addition, in order to ensure the stability and anti-interference ability of time-delay LFC power system, researchers have designed many control strategies, such as PI control [28], network predictive control [29][30][31], nonlinear control [32,33], and so on. PI control has good robustness and independent on the exact model of the power system, which is widely used in the industrial field at present.…”

Retracted: Nonlinear Control Method of Superconducting Energy Storage considering Voltage Imbalance in Distribution Network

“…Tis article has been retracted by Hindawi, as publisher, following an investigation undertaken by the publisher [1]. Tis investigation has uncovered evidence of systematic manipulation of the publication and peer-review process.…”