Decentralized Reactive Power Control for Advanced Distribution Automation Systems

Elkhatib, Mohamed; Shatshat, Ramadan El; Salama, M.M.A.

doi:10.1109/tsg.2012.2197833

Cited by 71 publications

(38 citation statements)

References 10 publications

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“…Therefore, for a group with DG plants ranked from 1 to according to their curtailment priorities, the values for and ℎ for a DG plant with rank of are calculated using (11) and (12), respectively, where is the time considered acceptable between two control actions. Fig.…”

Section: Time Delays -Multiple Dg Plantsmentioning

confidence: 99%

“…The seven wind farms (DG1 to DG7) are connected to bus- es 16,15,14,11,12,10, and 7 with capacities of 8, 10, 12, 2.5, 2.5, 2, and 12 MW, respectively. Three different wind profiles, WP1, WP2 and WP3, are adopted: WP1 is the same wind profile shown in Fig.…”

Section: Full Case Study ─ Multiple Dg Plantsmentioning

confidence: 99%

“…To specify the required adjustment, the voltage drop formula is applied in [12]. However, this is done considering the voltage at the other end of the corridor a constant value making this method not accurate enough for control purposes.…”

mentioning

confidence: 99%

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A Novel Voltage Sensitivity Approach for the Decentralized Control of DG Plants

Zhang

Ochoa

Valverde

2018

IEEE Trans. Power Syst.

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Abstract-Renewable distributed generation (DG) is likely to be actively controlled in future distribution networks to mitigate voltage issues resulting from high penetrations. This requires understanding the corresponding dependencies between voltage magnitudes and DG active/reactive power outputs. One approach to compute these dependencies is to use classical sensitivity methods such as those based on the Jacobian matrix inverse. However, updating the latter involves extensive remote monitoring. This paper presents a novel approach to produce voltage sensitivities applying the Surface Fitting technique on data based solely on the knowledge of network characteristics; making it suitable for decentralized DG control. To assess the benefits, comparisons with classical methods are carried out using the 16-bus UK GDS test network (1-min resolution simulations) considering a decentralized voltage control algorithm that simultaneously caters for the active and reactive power outputs of a single DG plant. The robustness of the proposed approach is also investigated considering changes in network parameters. Finally, the use of coordinated time delays is proposed to cater for multiple DG plants. Comparisons with a centralized optimization demonstrate that the combined use of the proposed voltage sensitivity approach and decentralized control algorithm is an effective and implementable candidate to actively manage renewable DG plants.

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Section: Time Delays -Multiple Dg Plantsmentioning

confidence: 99%

Section: Full Case Study ─ Multiple Dg Plantsmentioning

confidence: 99%

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A Novel Voltage Sensitivity Approach for the Decentralized Control of DG Plants

Zhang

Ochoa

Valverde

2018

IEEE Trans. Power Syst.

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“…Generally, VVC in a distribution system can be implemented in a centralized or decentralized manner. Centralized offline control have been implemented to determine dispatching schedules for switched Sh.Cs, OLTC settings at substations and the active/reactive power of DGs for the day ahead, according to an optimization problem based on load demand forecasts [7][8][9][10][11][12], while research on decentralized real-time control have aimed to control the VVC devices based on real-time and local measurements [13][14][15].…”

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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“…Furthermore, it is very difficult for a real-time controller to take into account the overall load change as well as the constraints of the maximum allowable daily operating times of switchable equipment. Based on SCADA capabilities and communication infrastructure, in [16,17], a real-time reactive power control has been implemented to optimally control the switched capacitors in distribution systems in order to minimize system losses and maintain admissible voltage profile. In [18], a new real-time voltage control method has been discussed, using load curtailment as a part of demand response programs to regulate voltage of the distribution feeders within their allowable ranges.…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Optimal Allocation of Reactive Power Ancillary Service in Distribution Systems in the Presence of Distributed Energy Resources

Samimi

Kazemi

2015

Applied Sciences

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Abstract:One of the most important Distribution System Operators (DSO) schemes addresses the Volt/Var control (VVC) problem. Developing a cost-based reactive power dispatch model for distribution systems, in which the reactive powers are appropriately priced, can motivate Distributed Energy Resources (DERs) to participate actively in VVC. In this paper, new reactive power cost models for DERs, including synchronous machine-based DGs and wind turbines (WTs), are formulated based on their capability curves. To address VVC in the context of competitive electricity markets in distribution systems, first, in a day-ahead active power market, the initial active power dispatch of generation units is estimated considering environmental and economic aspects. Based on the results of the initial active power dispatch, the proposed VVC model is executed to optimally allocate reactive power support among all providers. Another novelty of this paper lies in the pricing scheme that rewards transformers and capacitors for tap and step changing, respectively, while incorporating the reactive power dispatch model. A Benders decomposition algorithm is employed as a solution method to solve the proposed reactive power dispatch, which is a mixed integer non-linear programming (MINLP) problem. Finally, a typical 22-bus distribution network is used to verify the efficiency of the proposed method.

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Decentralized Reactive Power Control for Advanced Distribution Automation Systems

Cited by 71 publications

References 10 publications

A Novel Voltage Sensitivity Approach for the Decentralized Control of DG Plants

A Novel Voltage Sensitivity Approach for the Decentralized Control of DG Plants

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

A New Approach to Optimal Allocation of Reactive Power Ancillary Service in Distribution Systems in the Presence of Distributed Energy Resources

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