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In this work, we propose a distributed cooperative control approach to enable autonomous load control for ancillary services. Controllable loads (CL) (which include heating ventilating and air conditioning (HVAC) units and electric vehicles (EV)) may have heterogeneous dynamics and different operational constraints, but they can be controlled through a local network to provide for fast and efficient...
Primary frequency control using smart loads with reactive only compensation (SLQ) has been shown in the past. In this paper, further improvement in frequency regulation is shown using smart loads with a back-to-back converter (SLBC) arrangement. This introduces additional flexibility and thereby, allows independent and wider control over active and reactive power consumption of the smart load. The...
In a demand dispatch regime, the error between the load demand and supply is reduced continually to zero such that the frequency is maintained close to its rated value. In the demand dispatch (DD) paradigm, loads follow generation to keep the balance between demand and supply for frequency stabilization. This is in contrast to the conventional demand response in which generation comply with the load...
The well-known active power-frequency and reactive power-voltage amplitude droop control is widely used in the coordinative control of parallel inverters in microgrids. However, this conventional droop method may cause frequency and voltage deviation, which affects the accuracy of power supply. This paper proposes a novel secondary control strategy to compensate this deviation. This strategy mimics...
This paper presents an LPV/H∞ control strategy applied to power source coordination on board of average-power electric vehicles. The proposed approach concerns frequency separation of responses between three power sources in order to satisfy power demand of vehicle's electrical motor, taking into account that sources are expected to work within distinct frequency ranges. The three sources - fuel cell,...
This paper aims to develop a hierarchical framework for demand-side frequency control. The framework involves two decision layers. The top layer determines a control gain for the aggregated load response on each bus using robust decentralized control theory. The second layer involves a large number of devices, which switch probabilistically during contingencies so that the aggregated power change...
Demand Response has been conventionally used as a resource to support the grid under steady state operating conditions by peak shifting or leveling the electrical load. The characteristics of responsive demand resources can also be used to support the grid during emergency and contingency conditions. Demand resources can respond very fast to provide ancillary services such as frequency regulation...
In this paper we present a distributed supervisory strategy for load/frequency control problems in networked multi-area power systems. Coordination between the control center and the areas is accomplished via data networks subject to communication latency which is modelled by time-varying time-delay. The aim here is at finding strategies able of reconfiguring, whenever necessary in response to unexpected...
A novel compact coupled planar resonator (CCPR) based VCO (voltage controlled oscillator) using mode-coupling technique was developed in response to expensive high Ceramic and SAW resonators based signal source for wireless communications. One of the problems related to the conventional Ceramic/SAW based resonators (with high Q and low phase noise) is the challenge for integration in IC form. Instead...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
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