Dynamic event‐triggered H_∞ load frequency control for multi‐area power systems with communication delays

Abstract

This paper investigates dynamic event‐triggered H∞ load frequency control for multi‐area power systems with communication delays. A novel co‐design method of trigger parameters and H∞ controller based on output feedback is proposed. Unlike routine multiplication operations, this method eliminates rank constraints on the input and output matrices, and avoids the processing of nonlinear terms related to the trigger parameters. Furthermore, under the presented dynamic event‐triggered mechanism, the threshold parameters are dynamically regulated according to the dynamic variation of the system. Therefore, the average data releasing rate can be adjusted in real time to better coordinate the use of network bandwidth resources and requirements of system dynamic performance. Specially, the usage of the infinite‐series‐based inequality and reciprocally convex combination inequality effectively reduces conservatism of the criteria. Finally, some simulations and related comparisons are carried out to demonstrate superiorities of the proposed method.

Load frequency control under false data inject attacks based on multi-agent system method in multi-area power systems

“…The multi-area LFC power systems of the i th area are shown in Figure 1 and the parameters are listed in Table 1. 24 Area control error (ACE) is used to measure the tie-line switching power between control areas. AC E i signal is a linear combination of frequency deviation and tie-line power deviation of i th area, which can be defined as…”

“…The robust stability and stabilization of adaptive event-triggered LFC of multi-area power systems were investigated under a networked environment via sliding mode control in Lv et al 23 Li et.al. 24 investigated dynamic event-triggered H ∞ LFC for multi-area power systems with communication delays. Hu et al 25 proposed intermittent communication consensus control based on dynamic event triggering mechanism for leaderless directed MAS networks.…”

“…In order to avoid system failure caused by network congestion, event-triggered transmission scheme was often applied to NCS. [17][18][19][20][21][22][23][24][25] The LFC for power systems with communication delays was studied in Wen et al 20 where an event-triggered control method was used to reduce the amount of communications required. In Liu et al, 21 the LFC for multi-area power systems under DoS attacks and deception attacks was solved by introducing an event-triggered mechanism and a switched system model.…”

“…3. In addition, most of the literatures [20][21][22][23][24] mentioned above rarely take FDIAs into account. Therefore, the conditions for maintaining the system asymptotic stability under FDIAs are given to guarantee the safe and stability operation of the system.…”

Decentralized observer‐based integral sliding mode control design of large‐scale interconnected systems and its application to doubly fed induction generator‐based wind farm model

“…Briefly, the LSISs contain several subsystems which are interconnected to each other and their communications make the system exhibit complex dynamical behaviors. [1][2][3][4][5] In order to study those behaviors, various types of analysis such as stability analysis, bifurcation analysis, control algorithms (stabilization analysis), analysis of controllability and observability are performed to better understand the nature of LSISs and develop the further application process of LSISs. On the other hand, the state variables are often not available in real-world LSISs, in this regard, an observer-based system is designed under a decentralized control technique that has the ability to mimic the original structure or measure the original state, which relies on only the local measurement information and may reduce the computational complexity, and improve the consistency and robustness.…”