More electric aircrafts (MEAs) comprise a vast amount of power electronic loads, which usually behave as constant loads (CPLs). The incremental negative impedance CPLs threatens system stability. To ensure an effective control flow in MEAs, eliminating the undesired behavior is necessity. This aim requires spontaneous estimation time-varying uncertain loads. In this paper, adaptive backstepping controller, interconnected to third-degree cubature Kalman filter, developed for dc microgrid (MG)...

The performance of dc shipboard power systems (SPSs) may degrade due to the negative impedance constant loads (CPLs) connected microgrids (MGs). To control dcSPS effectively, estimation instantaneous flow time-varying uncertain CPLs is necessary. Furthermore, fast adaptive needed deal with changes in CPL and quick stabilization MGs. Such a controller typically uses injection current from an energy storage system for actuation. Since measuring CPLs' powers require installing sensors that are...

The performance of a DC microgrid (MG) might degrade because the dynamics constant power loads (CPLs). In this paper, novel adaptive controller is proposed to mitigate destructive effect time-varying uncertain CPLs. A nonlinear disturbance observer developed estimate instantaneous estimated CPLs powers are then employed in Takagi-Sugeno fuzzy-based model predictive control strategy, aiming adaptively modify injecting current energy storage system. approach applied dc MG testbed that feeds...

In this paper, an improved dc-link voltage regulation strategy is proposed for grid-connected converters applied in dc microgrids.For the inner loop of gridconnected converter, a modulated direct power control employed to obtain two second-order linear timeinvariant systems, which guarantees that closed-loop system globally exponentially stable.For outer loop, sliding mode with load current sensor maintain constant even presence loads at dc-side, adversely affect stability.Furthermore,...

The word flexibility is central to Smart Grid literature, but this day a formal definition of still pending. This paper present taxonomy for modeling in Grids, denoted Buckets, Batteries and Bakeries. We consider direct control Virtual Power Plant (VPP), which given the task servicing portfolio flexible consumers by use fluctuating power supply. Based on developed we first prove that no causal optimal dispatch strategies exist considered problem. then two heuristic algorithms solving...

Large solar photovoltaic (PV) penetration using inverters in low-voltage (LV) distribution networks may pose several challenges, such as reverse power flow and voltage rise situations. These challenges will eventually force grid operators to carry out reinforcement ensure continued safe reliable operations. However, smart with reactive control capability enable PV systems support quality the network better. This article gives an overview of current state-of-the-art strategies for handling...

This paper presents the result of modelling and verification a generic slung load system using small-scale helicopter. The model is intended for use in simulation, pilot training, estimation, control. derived redundant coordinate formulation based on Gauss’ Principle Least Constraint Udwadia-Kalaba equation can be used to all body suspension types. gives an intuitive easy-to-use way simulating dierent types it includes detection response wire slacking tightening, aerodynamical coupling...

Often, when new sensor or actuator hardware becomes available for use in a control system, it is desirable to retain the existing system and apply capabilities gradual fashion rather than decommissioning entire replacing with an altogether system. However, this requires that controller remains action, law component added This paper formally introduces concept of Plug-and-Play proposes two different methods introducing components smooth manner, providing stability guarantees during transition...

The continuous introduction of renewable electricity and increased consumption through electrification the transport heating sector challenges grid stability. This study investigates load shifting demand side management as a solution. We present four-month experimental low-complexity, hierarchical Model Predictive Control approach for in near-zero emission occupied single-family house Denmark. control algorithm uses price signal, weather forecast, single-zone building model, non-linear heat...

We consider a virtual power plant, which is given the task of dispatching fluctuating supply to portfolio flexible consumers. The consumers are modeled as discrete batch processes, and associated optimization problem denoted plant dispatch (DVPPDP). First, nondeterministic polynomial time (NP)-completeness proved formally. then proceed develop tailored versions meta-heuristic algorithms hill climber greedy randomized adaptive search procedure (GRASP). tuned tested on portfolios varying...

Smart control in water systems aims to reduce the cost of infrastructure expansion by better utilizing available capacity through real-time control. The recent availability sensors and advanced data processing is expected transform view system operators, increasing need for deploying a new generation data-driven solutions. To that end, this paper proposes framework combined wastewater stormwater networks. We propose learn effect wet- dry-weather flows variation levels number level network....

This paper presents the design of a state estimator system for generic helicopter based slung load system.The is designed to deliver full rigid body information both and on unscented Kalman filter.Two different approaches are investigated: One parameter free kinematic model one aerodynamic model.The approach uses acceleration rate from two Inertial Measurement Units, load, drive simple model.A effective virtual sensor method developed maintain constraints imposed by wires in complex...

This paper develops methods for state estimation of aggregated thermostatically controlled loads (TCLs) in smart grids, via partial differential equation (PDE) techniques. TCLs include on/off devices, such as heat pumps, HVAC systems, and deep freezers. Control provides a promising opportunity to mitigate the mismatch between power generation demand, thus enhancing grid reliability enabling renewable energy penetration. However, persistent communication thousands central server can be...

Exploitation of flexible consumption in the future smart grid requires new actors and infrastructure. In this paper, we propose a hierarchical setup which central controller, so-called "aggregator," is responsible for managing flexibilities industrial thermal loads via contract-based direct control policy. The aggregator manipulates profile an optimal robust manner order to provide upward downward regulating power services. To end, consider model predictive design at aggregator. performance...

This paper deals with bumpless transfer between a number of observer-based controllers in gain scheduling architecture. Linear are designed for linear approximations non-linear system set operating points, and control can subsequently be achieved by interpolating each controller. The Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization is used to achieve smooth the controllers. approach produces scheduled controller as fractional transformation fixed parameter. tested on simple, but highly...