Investigating delays in frequency-dependent load control

Amini, Mahraz; Almassalkhi, Mads

doi:10.1109/isgt-asia.2016.7796427

Cited by 26 publications

(12 citation statements)

References 16 publications

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“…In that model, T d,i is the time delay associated with communicating with the ith VB and τ i is the time constant of the first-order model (similar to [39] for example). Specifically, (6) was formed by taking note of the following facts: i) The DERs that compose a VB turn on/off (possibly) sequentially, and there are power electronic components present inside each VB, both of which contribute to a net lag τ i ; ii) There are communication delays (generally of the order of 200 ms) between the head node of the feeder and each VB [40], [41], and delays associated with disaggregating the control signal into device-level signals [37]. The delays we consider in the VB model are in fact both these types of delays lumped together.…”

Section: B Virtual Battery Modelmentioning

confidence: 99%

Optimal and Resilient Coordination of Virtual Batteries in Distribution Feeders

Brahma

Nazir

Ossareh

et al. 2021

IEEE Trans. Power Syst.

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Section: B Virtual Battery Modelmentioning

confidence: 99%

Optimal and Resilient Coordination of Virtual Batteries in Distribution Feeders

Brahma

Nazir

Ossareh

et al. 2021

IEEE Trans. Power Syst.

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“…The problem of detecting a fault, finding the location, and then taking appropriate action is the basis of fault-tolerant control. Fortunately, many fault detection methods have been proposed over the last few years [15][16][17]. However, the main challenge in this paper is limited to take appropriate action after fault diagnosis.…”

Section: Proposed Fault-tolerant Strategymentioning

confidence: 99%

Reduced number of auxiliary H‐bridge power cells for post‐fault operation of three phase cascaded H‐bridge inverter

Aleenejad

Jafarishiadeh

Mahmoudi

et al. 2019

IET Power Electronics

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This work offers a fault-tolerant strategy that uses a combination of a hardware-based and a control-based faulttolerant methods for multilevel (ML) cascaded H-bridge (CHB) converters. The possibility of a switch failure in an ML converter is higher than a conventional inverter due to the increased number of power electronics switches. Although the event of a single switch failure is more likely, nonetheless, the fault tolerant operation of a ML converter with two or more faulty switches needs to be addressed as well. This article first offers a hardware topology that can bypass the faulty H-bridge cell and replace it with an auxiliary cell, in the event of a single switch failure. Then, it enhances the hardware topology with a modulation-based faulttolerant method for the event of more than one defective switch. Using this strategy, the CHB converter will be able to operate with maximum achievable output voltage in the post-fault condition. Experimental results are presented for a seven-level CHB converter for the validation of the theoretical outcomes. 2 Seven-level CHB inverter and the conventional fault-tolerant strategy for CHB inverter The traditional circuit topology of a seven-level CHB inverter is comprised of three series connected H-bridge cells in each phase. Each of these H-bridge cells contains a DC link voltage and four power switches S 1-S 4. In each H-bridge cell, the output AC terminal voltage can be made equal to V dc , 0, and −V dc by IET Power Electron.

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“…The DR program refers to a set of measures aimed at encouraging a voluntary change in the consumers' electricity usage pattern in response to changes in electricity prices or grid reliability conditions. The increase in the demand-side capacity following the participation in such programs could effectively reduce the electricity costs [2] and improve the robust operation of energy systems [3], as well as enhance system reliability [4,5]. The US Department of Energy has defined DR as changes in electric usage by end-use customers from their normal consumption patterns in response to changes in the price of electricity over time (passive participation), or to incentive payments (active participation) designed to induce lower electricity use at times of high wholesale market prices or when system reliability is jeopardized [6].…”

Section: Introductionmentioning

confidence: 99%

A Flexible Responsive Load Economic Model for Industrial Demands

et al. 2019

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The best pricing method for any company in a perfectly competitive market is the pricing scheme with regards to the marginal cost. In contrast to this environment, there is a market with imperfect competition. In this market, the price can be affected by some players in the generation/demand side (i.e., suppliers and/or buyers). In the economic literature, “market power” refers to a company that has the power to affect prices. In fact, market power is often defined as the ability to divert prices from competitive levels. In the electricity market, especially because of the integration of intermittent renewable energy resources (RESs) along with the inflexibility of demand, there are levels of market power on the supply side. Hence, implementation of demand response (DR) programs is necessary to increase the flexibility of the demand side to deal with the intermittency of renewable generations and at the same time tackle the market power of the supply side. This paper uses economic theories and mathematical formulations to develop a flexible responsive load economic model (FRLEM) based on real-time pricing (RTP) to show modification of the load profile and mitigation of the energy costs for an industrial zone. This model was developed based on constant elasticity of the substitution utility function, known as one of the most popular utility functions in microeconomics.

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Investigating delays in frequency-dependent load control

Cited by 26 publications

References 16 publications

Optimal and Resilient Coordination of Virtual Batteries in Distribution Feeders

Optimal and Resilient Coordination of Virtual Batteries in Distribution Feeders

Reduced number of auxiliary H‐bridge power cells for post‐fault operation of three phase cascaded H‐bridge inverter

A Flexible Responsive Load Economic Model for Industrial Demands

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