Abstract This paper proposes a fractional‐order sliding mode control (FOSMC) based on feedback linearization (FL) technique to mitigate subsynchronous interaction (SSCI) in doubly fed induction generator (DFIG)–based wind farms connected series‐compensated transmission lines. A linearized form of the studied system is obtained with use FL, which leads reduced order and small computational burden. Then FOSMC designed for grid‐side converter (GSC) stabilize SSCI provide considerable robustness...

Recently, many distributed fault-tolerant (Di-FT) secondary controls have been designed to improve the robustness of islanded AC microgrids (MGs) actuator faults/attacks. However, some problems still exist among existing research: (a) convergence speed faulty MG's states has not discussed, which is important for reducing inter-harmonic component around fundamental frequency thereby improving power quality; (b) large computing and sampling resources are required by relatively high control...

In AC microgrids (MGs), the required high control gain for dealing with faults would reduce robustness of secondary to communication constraints. To tackle this problem, subarea physical infrastructure MGs and two-layer framework are designed. For infrastructure, whole MG is divided into several areas, where each area composed a distributed generator (DG) geographical-close loads. Furthermore, by utilizing advanced metering (AMI), loads transmit local load change information DG in same area....

As an effective method to improve the reliability, advanced communication infrastructure also exposes islanded AC microgrid (MG) potential privacy threats. Although existing differential-privacy based secondary controls provide protection through adding noise, noise would bring about large harmonic components thereby degrading power quality. To tackle with this problem, a novel integrated privacy-preserving distributed fixed-time (PDF) control of MG is proposed for accurate frequency...

Domain adaptation can handle data distribution in different domains and has been successfully applied to bearing fault diagnosis under variable working conditions. However, most of these methods ignore the influences noise discrepancy on marking pseudo labels. Additionally, domain adaptive require a large amount training time. To overcome aforementioned challenges, firstly, sample rejection label correction using K-means (SRPLC-K-means) were developed explored filter noisy samples correct...

With the increasing integration of renewable energy sources into modern power grids, dynamic and operational complexity systems has grown significantly, rendering traditional control modeling approaches insufficient. Virtual Synchronous Generator (VSG) technology emerged as a critical solution, replicating dynamics synchronous generators to enhance stability inverter-based systems. Aggregation VSG units is essential for efficient analysis large-scale systems, especially in addressing...

Bulk power grid interconnection and the access of various smart devices make current highly complex. Timely accurately identifying operation state is crucial for monitoring stability grid. For this purpose, an evaluation method based on random matrix theory qualitative trend analysis proposed. This constructs two indicators data grid, which cannot only find out whether stable but can also there a bad in Compared with traditional method, analyzes grid’s from big perspective. It does not need...

Disruptive technologies have been employed in various fields with a strategic priority several countries as the core driving force of fourth industrial revolution, significantly impacting development new power systems. It is kernel to effectively identify future potential disruptive technologies. To overcome subjectivity and limitations existing technology identification methods, we propose method based on patent evolution analysis. Firstly, matrix data calculated. Afterward, dig into...

In this paper, a novel qualitative method is proposed to analyze the transient stability of power systems. Unlike traditional methods, can illustrate structural characteristics region and display boundary on global phase plane intuitively. Particularly, portraits are investigated in three-dimensional space. Global including singularity at infinity (SAI) show beginning ending points portraits, indicate whole situation an attractor's basin. To properly use clarify dynamic behavior infinity,...

With the continuous integration of new energy sources, power system gradually begins to present characteristics a weak grid. The system’s inertia decreases, leading problems in stability In this paper, virtual synchronous generator model with supercapacitor is analyzed. provides additional and suppresses frequency disturbances more quickly. Bifurcation theory used analyze nonlinear dynamics model. bifurcation diagram input active given phase portraits sequence diagrams angle are presented...

Due to the inherent property of Chua’s circuit, it is difficult obtain three state variables directly from and general control method hard apply circuit. For these chaotic circuits which have energy storage elements, a simple circuit designed get variables. In addition, an injected feedback realize synchronization proposed, can with unknown differential Two systems different motions are investigated using symbolic function. All results obtained verified by effectiveness feasibility above method.

This paper presents a method for determining the global basin boundary of power systems. To show general outline basin, system is shrink to projective space. First, new vector field induced according Poincare's method. After transformation, structural stability remains same. The singularities at infinity are obtained by proposed shrinking-projection which extended complemented in then evaluated based on distribution infinity. Finally, applied with perturbations study characteristic...

This paper presents a method for determining the global basin boundary of power systems. To show general outline basin, system is shrink to projective space. First, new vector field induced according Poincare's method. After transformation, structural stability remains same. The singularities at infinity are obtained by proposed shrinking-projection which extended complemented in then evaluated based on distribution infinity. Finally, applied with perturbations study characteristic...

To obtain the best interval of virtual inertia and damping synchronous generator (VSG), bifurcation theory is employed in this paper to overcome conservative traditional root locus method. In addition, optimal value real time, applies adaptive radial basis function neural network parameter control VSG. Finally, correctness range selection based on analysis excellent characteristics strategy, such as small frequency overshoot short response are verified by simulation experiments.