Coordinated Control of a DG and Voltage Control Devices Using a Dynamic Programming Algorithm

Kim, Young‐Jin; Ahn, Seon-Ju; Hwang, Pyeong-Ik; Pyo, Gi-Chan; Moon, Seung-Il

doi:10.1109/tpwrs.2012.2188819

Cited by 112 publications

(72 citation statements)

References 36 publications

(41 reference statements)

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“…Due to the increasing penetration of DGs, it appears reasonable to suppose that some ancillary services, such as reserve and reactive power support, could be provided by DGs in an efficient and economical manner [3][4][5]. Consequently, DGs could incorporate the VVC problem.…”

Section: Background and Motivationmentioning

confidence: 99%

Coordinated Volt/Var Control in Distribution Systems with Distributed Generations Based on Joint Active and Reactive Powers Dispatch

Samimi

Kazemi

2016

Applied Sciences

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Abstract:One of the most significant control schemes in optimal operation of distribution networks is Volt/Var control (VVC). Owing to the radial structure of distribution systems and distribution lines with a small X/R ratio, the active power scheduling affects the VVC issue. A Distribution System Operator (DSO) procures its active and reactive power requirements from Distributed Generations (DGs) along with the wholesale electricity market. This paper proposes a new operational scheduling method based on a joint day-ahead active/reactive power market at the distribution level. To this end, based on the capability curve, a generic reactive power cost model for DGs is developed. The joint active/reactive power dispatch model presented in this paper motivates DGs to actively participate not only in the energy markets, but also in the VVC scheme through a competitive market. The proposed method which will be performed in an offline manner aims to optimally determine (i) the scheduled active and reactive power values of generation units; (ii) reactive power values of switched capacitor banks; and (iii) tap positions of transformers for the next day. The joint active/reactive power dispatch model for daily VVC is modeled in GAMS and solved with the DICOPT solver. Finally, the plausibility of the proposed scheduling framework is examined on a typical 22-bus distribution test network over a 24-h period.

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Section: Background and Motivationmentioning

confidence: 99%

Coordinated Volt/Var Control in Distribution Systems with Distributed Generations Based on Joint Active and Reactive Powers Dispatch

Samimi

Kazemi

2016

Applied Sciences

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“…The amount of operation by each voltage control device is determined using a genetic algorithm based solver. Similarly, a strategy is proposed for coordinated control of DG units and voltage regulating devices using a dynamic programming algorithm in [12]. However, there is no guarantee or mechanism to minimize the DG unit and voltage regulating device interactions after enacting the dispatched local control actions of voltage regulating devices and DG units at t=t until the next dispatch decision is enacted at t=t+1.…”

Section: Oltcmentioning

confidence: 99%

Online Coordinated Voltage Control in Distribution Systems Subjected to Structural Changes and DG Availability

Ranamuka

Agalgaonkar

Muttaqi

2015

IEEE Trans. Smart Grid

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The responses of multiple DG units and voltage regulating devices such as tap changers and capacitor banks for correcting the voltage may lead to operational conflicts and oscillatory transients, where distribution systems are subjected to network reconfiguration and changes in availability of the DG units. Therefore, coordinated voltage control is required to minimize control interactions while accounting for the impact of structural changes associated with the network. This paper proposes a strategy for coordinating the operation of multiple voltage regulating devices and DG units in medium voltage (MV) distribution systems, under structural changes and DG availability, for effective voltage control. The proposed strategy aids to minimize the operational conflicts by allowing the farthest voltage regulating device to operate first on a priority scheme designed based on the electrical-distance between voltage regulating devices and DG units, while maximizing the voltage support by the DG units. The proposed coordination scheme is designed to enact with an aid of a substation centered distribution management system (DMS) for online voltage control. The control actions of proposed coordination strategy are tested on a MV distribution system, derived from the state of New South Wales, Australia, through simulations, and results are reported. NOMENCLATURE OLTCOn-load tap changer SVRStep

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“…Generally, in traditional AC distribution networks, voltage profiles are maintained through controlling on-load-tap-change transformers [1], shunt capacitors [2] and circuit breakers [3]. In a hybrid AC/DC distribution network, coordinated regulations of converter-based controllable devices are highly demanded for voltage control.…”

Section: Introductionmentioning

confidence: 99%

Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

Chen

Shen

et al. 2017

J. Mod. Power Syst. Clean Energy

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In a hybrid AC/DC medium voltage distribution network, distributed generations (DGs), energy storage systems (ESSs), and the voltage source converters (VSCs) between AC and DC lines, have the ability to regulate node voltages in real-time. However, the voltage regulation abilities of above devices are limited by their ratings. And the voltage regulation efficiencies of these devices are also different. Besides, due to high r/x ratio, node voltages are influenced by both real and reactive power. In order to achieve the coordinated voltage regulation in a hybrid AC/ DC distribution network, a priority-based real-time control strategy is proposed based on the voltage control effect of real and reactive power adjustment. The equivalence of real and reactive power adjustment on voltage control is considered in control area partition optimization, in which regulation efficiency and capability are taken as objectives. In order to accommodate more DGs, the coordination of controllable devices is achieved according to voltage sensitivities. Simulations studies are performed to verify the proposed method.

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Coordinated Control of a DG and Voltage Control Devices Using a Dynamic Programming Algorithm

Cited by 112 publications

References 36 publications

Coordinated Volt/Var Control in Distribution Systems with Distributed Generations Based on Joint Active and Reactive Powers Dispatch

Coordinated Volt/Var Control in Distribution Systems with Distributed Generations Based on Joint Active and Reactive Powers Dispatch

Online Coordinated Voltage Control in Distribution Systems Subjected to Structural Changes and DG Availability

Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

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