A Two-step Reactive Power optimization Method of OffShore Wind Farms with Discrete Devices Considered

2018 ◽  
Author(s):  
Zhisheng Wang ◽  
Xuemin Zhang ◽  
Bin Liu ◽  
Zhankui Zhang
Keyword(s):  
Reactive Power ◽  
Power Optimization ◽  
Wind Farms ◽  
Optimization Method ◽  
Offshore Wind ◽  
Reactive Power Optimization ◽  
Offshore Wind Farms

scholarly journals Energisation Method for Offshore Wind Farms Connected to HVdc via Diode Rectifiers

2019 ◽  
Author(s):  
Oscar Saborío-Romano ◽  
Ali Bidadfar ◽  
Jayachandra Naidu Sakamuri ◽  
Ömer Göksu ◽  
Nicolaos Antonio Cutululis
Keyword(s):  
Reactive Power ◽  
Wind Farms ◽  
Power Delivery ◽  
Offshore Wind ◽  
Proof Of Concept ◽  
Offshore Wind Farms ◽  
Suitable Alternative ◽  
Active And Reactive Power ◽  
Auxiliary Power ◽  
Run Up

Diode rectifiers (DRs) have been recently suggested as a viable alternative for connecting offshore wind farms (OWFs) to HVdc, eliciting growing interest from both industry and academia. However, energisation of DR-connected OWFs is not straightforward. The present study constitutes a proof of concept of a novel energisation method for DR-connected OWFs, in which auxiliary power is provided from the shore through the HVdc link and the dc bus bar of one or more WTs. The proposed method provides an alternative with minimal additional hardware, which can be easily extended to more WTs in the OWF, increasing reliability by providing redundancy. The study includes coinciding auxiliary loads with active and reactive power components and a semi-aggregated OWF model, in which every WT is individually represented in the string containing the energising WT. Two additional sequences of simulation events are considered following the initial energisation sequence. Such sequences comprise wind power taking over the provision of the auxiliary power and the run-up to maximum (available) power production. The simulation results indicate that the proposed method is a suitable alternative for energising OWFs connected to HVdc via DRs.<br><br>The manuscript has been submitted to IEEE Transactions on Power Delivery.

scholarly journals Energisation Method for Offshore Wind Farms Connected to HVdc via Diode Rectifiers

2021 ◽  
Author(s):  
Oscar Saborío-Romano ◽  
Ali Bidadfar ◽  
Jayachandra Naidu Sakamuri ◽  
Ömer Göksu ◽  
Nicolaos Antonio Cutululis
Keyword(s):  
Reactive Power ◽  
Wind Farms ◽  
Offshore Wind ◽  
Proof Of Concept ◽  
Offshore Wind Farms ◽  
Suitable Alternative ◽  
Active And Reactive Power ◽  
Auxiliary Power ◽  
Additional Sequence ◽  
Additional Hardware

Diode rectifiers (DRs) have been recently suggested as a viable alternative for connecting offshore wind farms (OWFs) to HVdc, eliciting growing interest from both industry and academia. However, energisation of DR-connected OWFs is not straightforward. The present study constitutes a proof of concept of a novel energisation method for DR-connected OWFs, in which auxiliary power is provided from the shore through the HVdc link and the dc bus bar of one or more WTs. The proposed method provides an alternative with minimal additional hardware, which can be easily extended to more WTs in the OWF, increasing reliability by providing redundancy. The study includes coinciding auxiliary loads with active and reactive power components and a semi-aggregated OWF model, in which every WT is individually represented in the string containing the energising WT. An additional sequence of simulation events is considered following the initial energisation sequence. Such sequence comprises wind power taking over the provision of the auxiliary power. The simulation results indicate that the proposed method is a suitable alternative for energising OWFs connected to HVdc via DRs.<br><br>The manuscript has been submitted to the CIGRÉ Symposium 2021.

scholarly journals Fundamentals of the C-DEEPSO algorithm and its application to the reactive power optimization of wind farms

2016 ◽  
Author(s):  
Carolina G. Marcelino ◽  
Paulo E. M. Almeida ◽  
Elizabeth F. Wanner ◽  
Leonel M. Carvalho ◽  
Vladimiro Miranda
Keyword(s):  
Reactive Power ◽  
Power Optimization ◽  
Wind Farms ◽  
Reactive Power Optimization

Interval Reactive Power Optimization for Distribution System with DGs

2014 ◽  
Vol 1008-1009 ◽  
pp. 421-425
Author(s):  
Yong Jin Chen ◽  
Jie He Su ◽  
Yong Jun Zhang ◽  
Ying Qi Yi
Keyword(s):  
Interval Arithmetic ◽  
Distribution System ◽  
Power Flow ◽  
Reactive Power ◽  
Power Optimization ◽  
Pso Algorithm ◽  
Optimization Method ◽  
Reactive Power Optimization ◽  
Load Fluctuation ◽  
Proposed Model

A reactive power optimization method based on interval arithmetic is presented to solve the uncertainty of the output of distributed generation (DG) and the effects of load fluctuation. The concept of interval number and interval arithmetic is introduced to model the interval power flow of distribution system, which is iterated by using the Krawczyk-Moore operator. The objective function is to minimize the interval midpoint value of system’s power loss, with taking the interval voltage constraints into consideration for the interval reactive power optimization model. A modified IEEE 14-bus system is used to validate the proposed model and its Particle Swarm Optimization (PSO) algorithm. The simulation results show that the proposed method is effective.

Application of Reactive Power Optimization in Power Grid in AVC

2014 ◽  
Vol 971-973 ◽  
pp. 979-982
Author(s):  
Yan Hong Li ◽  
Zhi Rong Zhang
Keyword(s):  
Optimization Model ◽  
Reactive Power ◽  
Power Optimization ◽  
Power Grid ◽  
Optimization Method ◽  
Reactive Power Optimization ◽  
Synchronous Generators ◽  
Hierarchical Partition ◽  
Operating Limits ◽  
External Conditions

Automatic voltage control(AVC) is the highest form of current power grid voltage and reactive power control,during the implementation of AVC, the whole network reactive power optimization isthe core and foundation. Thispaper researches and discuses the application of reactive power optimization inpower grid AVC. In the traditional reactive power optimization, the reactivepower limits of synchronous generators are fixed. In this paper, thesynchronous generator PQ operating limits change with external conditions,thus establishes reactive power optimization model in accordance with therequirements of AVC. Thispaper presents reactive power optimization method based on the principle ofpartition. The method decomposes the system to several partitions. Eachpartition separately optimized, thus reduces the system scale.And the convergence of the algorithm, the calculation speed and the discretevariable processing etc. improve. At the same time, this method reflects theclassification, hierarchical, partition, characteristics of coordinated controlof AVC.

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