Communication Network Constraints Research Articles

Event‐Triggered Fault‐Tolerant Control for Nonlinear Multilateral Teleoperation System With Unknown Environmental Forces

ABSTRACTIn this paper, an event‐triggered fuzzy adaptive fault‐tolerant control scheme is investigated to achieve displacement synchronization and force tracking for nonlinear multilateral teleoperation systems subject to actuator faults and communication network constraints. The time‐varying delays and network communication bandwidth limitations are incorporated into the communication network constraints, and the considered nonlinear systems are modeled by using T‐S fuzzy system theory. Then, a novel event‐triggered fuzzy adaptive fault‐tolerant control algorithm is designed to simultaneously estimate and compensate for possible actuator faults during system operation. Next, unlike many existing works, the unknown environmental forces are estimated by introducing radial basis function neural networks, and the estimated results are taken into account in the design of the event‐triggered mechanisms. Finally, a numerical simulation example is presented to illustrate the effectiveness of the designed algorithm.

Corrigendum: A distributed network‐based economic model predictive control for networked smart energy systems considering communication network constraints

Corrigendum: A distributed network‐based economic model predictive control for networked smart energy systems considering communication network constraints

A distributed network‐based economic model predictive control for networked smart energy systems considering communication network constraints

Generally, the modern networked energy systems are constructed from some coupled sub-systems interconnected via their states and share their information through a communication network featuring time delays. This article suggests an efficient multi-agent based cooperative-distributed networked economic model predictive control scheme for energy consumption optimisation and reducing the cost of consumed electricity in network-based smart energy systems considering communication network delays. In this regard, a buffer-based moving horizon strategy with estimator is suggested to estimate the own states of every sub-system and the coupled states, that is, the states in which their information exchange among sub-systems and their values are not accessible due to communication time delays. Moreover, the boundedness of the estimation error as well as the stability of the closed-loop system are established. The usability and proficiency of the suggested scheme are proved by applying the developed approach on two case studies.

A networked hierarchical control scheme for wide‐area systems: A power system application

AbstractThis paper presents a new networked hierarchical predictive sliding mode controller for the design of stabilizing signals to damp low frequency oscillations observed in geographically distributed networked power systems subject to communication network constraints. Firstly, through the generic framework of networked systems, a networked model is used for a distributed networked system in which network delays and data packet loss are considered in a wide area measurement system (WAMS). Then a hierarchical predictive sliding mode controller with robust reaching law is proposed to compensate the influence of WAMS communication latency and damp the inter‐area oscillations. For this, firstly, the overall system is decomposed into small subsystems with non‐sparse matrices and lower order; then a new suitable predictive sliding mode controller is designed to provide optimal performance. Furthermore, in order to coordinate the entire system, the gradient of interaction errors is used. The effectiveness of the proposed control framework is illustrated through numerical simulations on a 5‐area, 16‐machine power system with several interconnected areas. Simulation results show the capability of the proposed approach to enhance the networked power systems' damping in comparison with a conventional networked control method.

Research and Analysis of Business Systems for County Grid

Situation county business system construction is in-depth analyzed in this article. The communication network constraints,lack of standards and operational system is not unified planning are pointed, cannot achieve system integration and sharing of data between departments and efficient coordination office problems. Especially the construction of "Three-Five" new system breaks the pattern of the original business case of rural power management, resulting in multi-disciplinary system efficiency is not high, the accuracy and reliability of system data are reduced and other issues. This paper proposes a stable and efficient communication network in support of the construction of county power production business operations integration platform to achieve business integration applications. The system can provide support services for marketing, production, operations.