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An Approach to the Ultimate Goal of Power Grid Development—Constant Voltage Operation

CSEE Journal of Power and energy Systems 2017年第4期3卷 380-389页

作者： Zheng Xu Zhipeng Bian Binjie Cheng Department of Electrical Engineering Zhejiang UniversityHangzhou 310027China

The concept of constant voltage operation is proposed in this paper and it is demonstrated that the ultimate goal of power grid development is constant voltage *** topic is expanded into three aspects:the benefits of constant voltage operation,the technology and equipment to realize constant voltage operation,and the reactive power compensation capacity needed for constant voltage *** benefits of constant voltage operation have four aspects:1)Constant voltage operation is the ultimate presentation of the strong smart grid;2)Constant voltage operation can resist grid disturbances in the most powerful manner and greatly improve the power system stability;3)Constant voltage operation can effectively eliminate the voltage fluctuation problem involved with the integration of large scale renewable energy;4)Constant voltage operation can minimize the grid power *** means to realize constant voltage operation is primarily the modular multilevel converter based STATCOM(MMC-STATCOM),which has encountered great acceptance during recent *** verifications are run in a modified IEEE 300-bus system and the Pearl River Delta grid in PSS/*** results indicate that constant voltage operation can greatly improve the stability of power systems and the capacity of installed MMC-STATCOMs is within an acceptable range.

关键词： Constant voltage operation DC multi-infeed MMC-STATCOM reactive power balance receiving system renewable energy integration voltage fluctuation

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A Chance-Constrained Wind Range Quantification Approach to Robust SCUC by Determining Dynamic Uncertainty Intervals

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CSEE Journal of Power and energy Systems 2016年第1期2卷 54-64页

作者： Aditi Upadhyay Bingqian Hu Jie Li Lei Wu ECE Department Clarkson UniversityPotsdamNYUSA

With increasing penetration of wind energy,the variability and uncertainty of wind resources have become important factors for power systems *** particular,an effective method is required for identifying the stochastic range of wind power output,in order to better guide the operational security of power *** paper proposes a metric to determine accurate wind power output ranges so that the probability of actual wind power outputs being out of the range would be less than a small pre-defined value.A mixed-integer linear programming(MILP)based chance-constrained optimization model is proposed for efficiently determining optimal wind power output ranges,which are quantified via maximum and the minimum wind generation levels with respect to a certain time *** derived wind power range is then used to construct dynamic uncertainty intervals for the robust securityconstrained unit commitment(SCUC)model.A comparison with the deterministic SCUC model and the traditional robust SCUC model with presumed static uncertainty interval demonstrates that the proposed approach can offer more accurate wind power variabilities(i.e.,different variability degrees with respect to different wind power output levels at different time periods).The proposed approach is also shown to offer more effective and robust SCUC solutions,guaranteeing operational security and economics of power *** case studies on a 6-bus system and the modified IEEE 118-bus system with realworld wind power data illustrate the effectiveness of the proposed approach.

关键词： Chance-constrained optimization MILP renewable energy integration SCUC wind power ranges

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Electronictization-A Foundation for Grid Modernization

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Chinese Journal of Electrical Engineering 2015年第1期1卷 1-8页

作者： Don Tan IEEE Power Electronics Society New JerseyUSA

Smart grid is the flag under which the US DoE has been mobilizing efforts to modernize the *** is the first step towards a smart modern *** is a process that transforms the grid from electrical and electromechanical(EE)to electronic,electrical and electromechanical(EEE),laying down the very basic foundation for the modern *** things grid connected(ATGC)has five groups of essential hardware:1)Grid interface(smart)inverters;2)Hardware for flexible AC transmissions;3)Intelligent electronic power transformers(grid scale);4)Solid-state circuit breaker,current limiters,smart fuses and sensors;and 5)Multi-port bidirectional power&control *** and deployment of ATGC will be a grassroots drive to transform the grid from an old passive technology to a new active technology based on electronic power transmission,distribution,processing and *** modernization represents a win-win-win situation for the environment(Government),consumers,and grid owners/operators.

关键词： Grid modernization electronictization fractal grid structure energy system resiliency fault management fault isolation renewable energy integration all things grid connected

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