H _∞ control of single‐machine infinite bus power systems with superconducting magnetic energy storage based on energy‐shaping and backstepping

Abstract

This article studies the H ∞ control problem for single-machine infinite bus power systems with superconducting magnetic energy storage (SMES) via simultaneous design of generator excitation control and SMES control. In the control system design, the exciter dynamics and unknown external disturbances are considered for practical implementation in power systems. A new synthesis framework is proposed to address the robust control problem of power systems with SMES. First, from the energy perspective, the interconnection and damping assignment (IDA) approach is applied to improve the transient performance of power systems. Second, by introducing the idea of virtual control in the design process, the authors obtain the solution of a partial differential equation that is a crucial point and cannot be obtained by using the traditional IDA method. Third, in order to enhance the robustness of the closedloop system, the authors study the H ∞ control design that is challenging and difficult for power systems considering the above mentioned practical considerations. In addition, the authors use a novel equivalent generator model to avoid using unmeasurable infinite bus voltage. Simulation results also show the effectiveness and advantage of the proposed controller.

Application of superconducting magnetic energy storage in electrical power and energy systems: a review

“…The basic design of 10‐kJ class SMES can be found in , high‐filed HTS SMES coil , 200‐kJ 2G HTS solenoidal SMES coil can be found in , and their thermal and cooling design can be found in . The SMES founds application in mitigating the wind energy system fluctuations , voltage harmonics and enhancing stability , and its modern prospectus applications are given in . Robust controller schemes such as fuzzy logic, hysteresis, H‐infinity and sliding mode control schemes have been applied to SMES in conjunction with voltage source converter in MG .…”

A novel integration of pd-type fuzzy logic controllers and smes devices to maintain the network frequency of a large-scale power system

“…In this paper, superconducting magnetic energy storage (SMES) devices, which have been considered to design power system stabilizers, are also investigated to solve the problem of LFC [17,18,19,20,21,22,23]. It was found that these SMES units using thyristor-converters and superconducting coil are able to compensate for the sudden large load disturbances, such as the start and/or stop of big industrial factories.…”

Transient stability enhancement control of power systems with time‐varying constraints

“…Unexpected system failures and external disturbances could also degrade the performance of a controller designed for a specific model. To overcome this problem, robust controllers are developed to deal with the uncertainties [2–5, 12–15]. The L 2 gain from the disturbance to the power system output can be maintained to a given level by the controllers designed in [4, 12].…”

“…To overcome this problem, robust controllers are developed to deal with the uncertainties [2–5, 12–15]. The L 2 gain from the disturbance to the power system output can be maintained to a given level by the controllers designed in [4, 12]. The H ∞ performance is achieved in [13] by solving a linear matrix inequality.…”