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Performance improvement of complementary feeders using static transfer switch system

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 189-200页

作者： Tahir MAHMOOD Mohammad Ahmad CHOUDHRY Department of Electrical Engineering University of Engineering and Technology

The performance of complementary feeders, running in parallel, can be significantly improved by installing static transfer switches （STSs） at critical locations. We develop the STS control logic, which transfers the critical load from the preferred feeder to the alternate feeder when a voltage sag or a fault occurs on the preferred feeder. A forced commutation technique is proposed and implemented to turn off the preferred feeders＇ thyristor, thus avoiding cross current to flow and minimizing the transfer time. Simulation results show that the forced commutation technique is more effective as compared to the recently proposed time delay technique for STS operation. Two different feeders, namely New Exchange, the preferred feeder, and Sector 1-10/2, the alternate feeder of Islamabad Electric Supply COmpany （IESCO）, Pakistan, have been selected for case studies. The software PSCAD/EMTDC professional package has been used for simulation.

关键词： Complementary feeder Cross current Static transfer switch (STS) sensitive load Voltage sag PSCAD/EMTDC

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Coordinated Active and Reactive Power Optimization Considering load Characteristics for Active Distribution Network

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Chinese Journal of Electrical Engineering 2020年第4期6卷 97-105页

作者： Chenchen Yong Yong Li Zilong Zeng Zhiwen Zhang Zhenyu Zhang Yanlun Liu College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Zhuhai Powint Electric Co. Ltd.Zhuhai 519085China

Voltage sensitive loads are extremely susceptible to voltage fluctuations,resulting in power system safety issues and economic *** to the load component of voltage sensitive loads being changed at different times,a voltage sensitive load model including the time characteristics is *** improve the voltage distribution in the active distribution network(ADN),the linearized active and reactive power coordinated optimization model for minimizing the operational cost(including the fluctuating cost of sensitive loads)is ***,the simulation on the IEEE 33-bus system demonstrates that the proposed control strategy can effectively stabilize the bus voltage of the sensitive load and reduce the operational costs of the ADN.

关键词： sensitive load time-varying characteristics active distribution network

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Mathematical Morphology-Based Artificial Technique for Renewable Power Application

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Computers, Materials & Continua 2021年第11期69卷 1851-1875页

作者： Buddhadeva Sahoo Sangram Keshari Routray Pravat Kumar Rout Mohammed M.Alhaider Department of Electrical Engineering Siksha‘O’Anusandhan UniversityOdisha751030India Department of Electrical Electronics Engineering Siksha‘O’Anusandhan UniversityOdisha751030India College of Engineering at Wadi Addawaser Prince Sattam bin Abdulaziz University11991Saudi Arabia

This paper suggests a combined novel control strategy for DFIG based wind power systems(WPS)under both nonlinear and unbalanced load *** combined control approach is designed by coordinating the machine side converter(MSC)and the load side converter(LSC)control *** proposed MSC control approach is designed by using a model predictive control(MPC)approach to generate appropriate real and reactive *** MSC controller selects an appropriate rotor voltage vector by using a minimized optimization cost function for the converter *** shows its superiority by eliminating the requirement of transformation,switching table,and the PWM *** proposed MSC reduces the cost,complexity,and computational burden of the *** the other hand,the LSC control approach is designed by using a mathematical morphological technique(MMT)for appropriate DC component *** to the appropriate DC-component extraction,the WPS can compensate the harmonics during both steady and dynamic ***,the LSC controller also provides active power filter operation even under the shutdown of WPS *** verify the applicability of coordinated control operation,the WPS-based microgrid system is tested under various test *** proposed WPS is designed by using a MATLAB/Simulink software.

关键词： Model predictive control mathematical morphological technique power quality power reliability wind power system sensitive load

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