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ZHU Yonggang
Wuhan University

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Application of Designing Economic Mechanisms to Power Market - Part 1 Generation Side Power Market Design XIE Qingyang; ZHU Yonggang; YING Liming
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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The paper studies on the core philosophy and algorithm of the designing economic mechanisms theory, a new algorithm of designing incentive compatible power market mechanisms is proposed, a generation side power market mechanism model which has features of inventive compatibility, informationally efficient and decentralized decision is constructed. The power market based on the designing economic mechanisms theory can lead to the Pareto Optimality of the resource allocation; meanwhile GENCOs are permitted to pursue profits maximization. The paper is in two parts. Part 1 focuses on the process of constructing a generation side power market competitive mechanism model based on the designing economic mechanisms theory. Part 2 presents the characteristic analysis of the generation side power market competitive mechanism. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2369
Application of Designing Economic Mechanisms to Power Market - Part 2 Characteristic Analysis of Generation Side Power Market ZHU Yonggang; XIE Qingyang; YING Liming
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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The incentive power market may lead to a high information cost if it is not informationally efficient. The paper analyzes the characteristic of the generation side power market mechanism model based on the designing economic mechanisms theory by the three GENCOs (Generation Companies) case. The result of analysis is that the mechanism model has four main features: the informationally efficient which means that the mechanism meets requirements of the observational efficiency, the communication efficiency and the low complexity of computing; the incentive compatibility which indicates that the resource allocation of the power market is Pareto Optimality and the social benefit achieves the maximization when GENCOs also achieve profit maximization; the decentralized decision which refers to preserving the privacy information of GENCOs; encouragement of competition which suggests that the mechanism encourages GENCOs to compete with each other healthily. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2370
Impact of Distributed Generation on Relay Protections of Distribution Grid Zhou Bin; Ying Liming; Zhu Yonggang; Huang Chao
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 6: June 2013
Publisher : Institute of Advanced Engineering and Science

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Distributed Generation (DG) generates electricity from many small distributed energy sources or even customer’s small power plants. It always comes up with the terminal customer power quality management and the technology of energy cascade utilization. DG has lots of characteristics such as one single point of access, being power and being load, two operating mode in a grid or as an island, a great deal of application of power electronic devices, easily influenced by natural environmental factors etc. DG has impacts to the original grid in terms of the grid structure, the direction of power flow, the fault current level when a fault happens, etc and subsequently the relay protection mechanism must be looked into. This paper analyses the impact of accessing the DG on the distributed grid in three cases which are the DG accessing to the end of the distributed feeders, to the middle, and the DG accessing to lines, on relay protections. At the end of the paper it also comes up with improvements in detail. DOI: http://dx.doi.org/10.11591/telkomnika.v11i6.2674
Differential Protection for Distributed Micro-Grid Based on Agent ZHOU Bin; YING Li-ming; ZHU Yonggang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 5: May 2013
Publisher : Institute of Advanced Engineering and Science

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The Micro-grid, even though not a replacement of the conventional centralized power transmission grid, plays a very important role in the success of rapid development of renewable energy resources technologies. Due to the facts of decentralization, independence and dynamic of sources within a Micro-grid, a high level automation of protection is a must. Multi-Agent system as a approach to handle distributed system issues has been developed. This paper presents an MAS based differential protection method for distributed micro-grid. The nodes within a micro-grid are divided into primary and backup protection zones. The agents follow predefined rules to take actions to protect the system and isolate the fault when it happens. Furthermore, an algorithm is proposed to achieve high availability in case of Agent itself malfunction. The method is using Matlab for simulation and shows it satisfies relay protection in terms of the selectivity, sensitivity, rapidity and reliability requirements. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2497
Co-Authors Huang Chao XIE Qingyang YING Li-ming YING Liming YING Liming Zhou Bin