Optimal Reactive Power Dispatch Considering Costs of Adjusting the Control Devices

Zhang, Yongjun; Ren, Zhaoyu

doi:10.1109/tpwrs.2005.851920

Cited by 101 publications

(47 citation statements)

References 19 publications

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“…The prices, and , respectively, for the transformer tap change and shunt adjustment, can be estimated, e.g. convert to the cost/time considering the operational cost and the maximum allowable adjustment times over the life time [58].…”

Section: Objectivementioning

confidence: 99%

Voltage Control in the Future Power Transmission Systems

Qin

2018

Springer Theses

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Section: Objectivementioning

confidence: 99%

Voltage Control in the Future Power Transmission Systems

Qin

2018

Springer Theses

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“…Therefore, the average value of UAC for all compensators is adopted here. According to long-term operation experience, the average value corresponds to 4 kW/times [10]. Then, the objective function (3) can be transformed as follows:…”

Section: Normalization Of Unit Adjustment Costmentioning

confidence: 99%

“…Therefore, this problem is converted into several single Deterministic ORPD (DORPD) problems that can be solved by traditional optimization methods. Another approach considering costs of adjusting discrete control devices is proposed to avoid excessive operations [6,10]. However, in these articles, load uncertainty is not taken into account.…”

Section: Introductionmentioning

confidence: 99%

A Two-stage Stochastic Programming Model for Optimal Reactive Power Dispatch with High Penetration Level of Wind Generation

Chen

Yan

Lee³

et al. 2017

Journal of Electrical Engineering and Technology

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-The increasing of wind power penetration level presents challenges in classical optimal reactive power dispatch (ORPD) which is usually formulated as a deterministic optimization problem. This paper proposes a two-stage stochastic programming model for ORPD by considering the uncertainties of wind speed and load in a specified time interval. To avoid the excessive operation, the schedule of compensators will be determined in the first-stage while accounting for the costs of adjusting the compensators (CACs). Under uncertainty effects, on-load tap changer (OLTC) and generator in the second-stage will compensate the mismatch caused by the first-stage decision. The objective of the proposed model is to minimize the sum of CACs and the expected energy loss. The stochastic behavior is formulated by three-point estimate method (TPEM) to convert the stochastic programming into equivalent deterministic problem. A hybrid Genetic Algorithm-Interior Point Method is utilized to solve this large-scale mixed-integer nonlinear stochastic problem. Two case studies on IEEE 14-bus and IEEE 118-bus system are provided to illustrate the effectiveness of the proposed method.

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“…However, despite the complexity of the proposed models and results obtained, a precise definition of the cost of reactive power production and the methodology to obtain the cost curves are not very clear. Different objective functions are considered such as maximisation of reactive reserve margin [12], minimisation of deviations from contracted transactions [13], minimisation of the cost of adjusting reactive power control devices [14] and maximisation of system loadability to minimise the risk of voltage collapse [15] are more or less focused on the economical side of reactive production cost and often lack economic meaning. Pricing of reactive power under the deregulated power systems is presented [16].…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective fuzzy‐based procedure for enhancing reactive power management

El‐Sehiemy¹,

El‐Ela²,

Shaheen³

2013

IET Generation, Transmission & Distribution

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This study proposes a multi-objective fuzzy-based procedure for solving reactive power management in competitive environment. The proposed procedure incorporates both economical and technical aspects of reactive power support. The economical aspect aims to minimise the total costs of reactive power purchase from service providers as primary objective function, whereas the technical aspect is taken care of through the secondary objective function that minimises the total transmission losses. The proposed procedure achieves security constraints such as the bus voltage limits, reactive power capability limits and transmission line reactive transfer limits. The proposed procedure is applied to the west-delta region system as a part of the Egyptian Unified network. The numerical results show that the proposed procedure achieves a minimum real power loss with maximal reactive reserve for power systems for different operating conditions.

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Optimal Reactive Power Dispatch Considering Costs of Adjusting the Control Devices

Cited by 101 publications

References 19 publications

Voltage Control in the Future Power Transmission Systems

Voltage Control in the Future Power Transmission Systems

A Two-stage Stochastic Programming Model for Optimal Reactive Power Dispatch with High Penetration Level of Wind Generation

Multi‐objective fuzzy‐based procedure for enhancing reactive power management

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