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An Adaptive Wireless power Sharing control for Multiterminal HVDC

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Computer Systems Science & Engineering 2023年第4期45卷 117-129页

作者： Hasan Alrajhi Electrical Engineering Department College of Engineering and Islamic ArchitectureUmm Al-Qura UniversityMakkah21955Saudi Arabia

power sharing among multiterminal high voltage direct current terminals(MT-HVDC)is mainly developed based on a priority or sequential manners,which uses to prevent the problem of overloading due to a predefined controller ***,fixed power sharing control also suffers from an inability to identify power availability at a rectification *** is a need for a controller that ensures an efficient power sharing among the MT-HVDC terminals,prevents the possibility of overloading,and utilizes the available power sharing.A new adaptive wireless control for active power sharing among multiterminal(MT-HVDC)systems,including power availability and power management policy,is proposed in this *** proposed control strategy solves these issues and,this proposed controller strategy is a generic method that can be applied for unlimited number of converter *** rational of this proposed controller is to increase the system reliability by avoiding the necessity of fast communication *** test system in this paper consists of four converter stations based on three phase-two AC voltage *** proposed control strategy for a multiterminal HVDC system is conducted in the power systems computer aided design/electromagnetic transient design and control(PSCAD/EMTDC)simulation *** simulation results significantly show the flexibility and usefulness of the proposed power sharing control provided by the new adaptive wireless method.

关键词： active power control fixed power sharing current control HVDC transmission MTDC voltage source converter(VSC) power sharing control adaptive wireless control power conversion

A Possible Configuration with Motor-generator Pair for Renewable Energy Integration

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CSEE Journal of power and Energy Systems 2017年第1期3卷 93-100页

作者： Siming Wei Yingkun Zhou Song Li Yongzhang Huang State Key Laboratory of Alternate Electrical power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

High penetration rates of renewable energy will bring stability problems for the future power *** of the critical issues is lack of *** this paper,a synchronous motor-generator pair(MGP)system is proposed as a possible solution for renewable energy integration to enhance inertia and improve grid ***,feasibility studies of MGP on inertia,damping,efficiency,and cost are ***,an analytical model is established based on its rotor angle *** active power control scheme based on voltage phase difference between renewable energy source and grid is then proposed,and state equations of MGP are derived for small signal ***,two experiments are designed and implemented to verify stable operation and active power regulation of the MGP system.A single-machine infinite bus system is tested to investigate small signal stability and frequency response of *** results show that the MGP system has a solid base in physics and is a feasible solution for providing enough inertia and improving small signal performance in the power grid with high penetration of renewable *** paper concludes with a discussion on future research directions to gain a better understanding of MGP.

关键词： active power control high penetration of renewable energy inertia motor-generator pair(MGP) small signal stability

Wireless Sensor Networks Based control Strategies for the Enhancement of Reliability in Smart Grids

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Circuits and Systems 2016年第9期7卷 2499-2506页

作者： A. K. P. Kovendan D. Sridharan Department of Electronics and Communication Engineering College of Engineering Campus Guindy Anna University Chennai India

The rapid increase in the demand for electricity necessitates the power quality improvement for achieving better reliability in smart grids. Wireless Sensor Networks (WSN) is the proven technology for reliable monitoring. This paper proposes a system model for the development and implementation of WSN based communication system for the monitoring of distributed generation, loads and transmission lines in the electrical grid and a controller system for automated control on the electrical grid. This work also aims to reduce the carbon footprints by reducing the dependency of electrical grid through the enhancement of distributed generation and grid sharing for avoiding voltage rise problem. To achieve this, a smarter electrical grid has been developed for the validation of smart grid considering a generation substation, a transmission substation and a distributed generation with loads. The occurrence of power quality issue and voltage rise has been controlled by active power control strategy. The communication network and controller has been modeled and tested for the performance of monitoring system and data communication capability on smart grid.

关键词： WSN Communication System active power control Electrical Grid Smart Grid

Smart Boilers: Grid Support Services from Non-Critical Loads

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Journal of power and Energy Engineering 2020年第12期8卷 23-45页

作者： Panagis N. Vovos Konstantinos G. Georgakas Department of Electrical and Computer Engineering University of Patras University Campus Rio Greece Department of Electrical and Computer Engineering University of the Peloponnese Patras Greece

The aim of this paper is to present the concept of a simple and cheap upgrade for electric water boilers, allowing them to provide power quality services to the distribution grid. The upgrade requires only minimum additional hardware and it is easily installable. “Smart Boilers”, as the upgraded boilers are named, perform precise active and reactive power control, but most significantly mitigate line current harmonics. Αctive and reactive power control is implemented by appropriate regulation of the modulation sinewave amplitude and phase, respectively. This type of control is easily customizable in order to accommodate a variety of power quality targets, depending on the required level of services and available grid monitoring equipment. The method used for line current harmonic compensation is based on the injection of mirror harmonics created at the modulation stage of the converter. It is indifferent of harmonic source: it is equally successful at mitigating harmonics caused by the power electronic converter of the Smart Boiler, other sources of current harmonics or loads. The achieved grid services are clearly beyond the “on/off” operation of electric boilers, currently implemented by Demand Side Management (DSM) in order to shift load away from peak hours. It has been demonstrated through simulations, that Smart Boilers can assist voltage regulation at terminal buses, compensate reactive power and suppress harmonic currents at lines.

关键词： Electrical Grid Improvement High Harmonics Minimization Smart Boilers Smart power Grids active power control Reactive power Compensation