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Circuit-theory-based method for transmission fixed cost allocation based on game-theory rationalized sharing of mutual-terms

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1507-1522页

作者： Saeid POUYAFAR mehrdad tarafdar hagh Kazem ZARE Department of Electrical and Computer Engineering University of TabrizTabrizIran Engineering Faculty Near East UniversityMersin 1099138 NicosiaNorth CyprusTurkey

This paper proposes a new method to allocate the transmission fixed costs among the network participants in a pool-based electricity *** allocation process relies on the circuit laws,utilizes the modified impedance matrix and is performed in two individual steps for the generators and *** determine the partial branch power flows due to the participants,the equal sharing principle is used and validated by the Shapley and Aumann-Shapley values as two preferred game-theoretic *** proposed approach is also applied to determine the generators’contributions into the loads,and a new concept,named circuit-theory-based equivalent bilateral exchange(EBE),is *** the proposed method,fairly stable tariffs are provided for the ***-subsidies are reduced and a fair competition is made by the proposed method due to the counter-flows being alleviated compared with the well-known Z-bus *** results are reported and discussed to validate the proposed cost allocation *** analysis reveals that the method satisfies all conditions desired in a fair and efficient cost allocation ***,the developed technique has been implemented successfully on the 2383-bus Polish power system to emphasize that the method is applicable to very large systems.

关键词： Transmission fixed cost allocation Circuit theory Equal sharing principle Game theory

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Hybrid intelligent water drop bundled wavelet neural network to solve the islanding detection by inverter-based DG

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Frontiers in Energy 2015年第1期9卷 75-90页

作者： mehrdad tarafdar hagh Homayoun EBRAHIMIAN Noradin GHADIMI Faculty of Electrical and Computer Engineering University of TabrizTabriz 0411 Iran Department of Electrical Engineering Ardabil Branch Islamic AzadUniversity Ardabil 045 Iran

In this paper, a passive neuro-wavelet based islanding detection technique for grid-connected inverter- based distributed generation was developed. The weight parameters of the neural network were optimized by intelligent water drop （IWD） to improve the capability of the proposed technique in the proposed problem. The proposed method utilizes and combines wavelet analysis and artificial neural network （ANN） to detect islanding. Connecting distributed generator to the distribution net- work has many benefits such as increasing the capacity of the grid and enhancing the power quality. However, it gives rise to many problems. This is mainly due to the fact that distribution networks are designed without any generation units at that level. Hence, integrating distributed generators into the existing distribution network is not problem-free. Unintentional islanding is one of the encountered problems. Discrete wavelet transform （DWT） is capable of decomposing the signals into different frequency bands. It can be utilized in extracting discrimi- native features from the acquired voltage signals. In passive schemes with a large non-detection zone （NDZ）, concern has been raised on active method due to its degrading power quality effect. The main emphasis of the proposed scheme is to reduce the NDZ to as close as possible and to keep the output power quality unchanged. The simulation results from Matlab/Simulink shows that the proposed method has a small non-detection zone, and is capable of detecting islanding accurately within the minimum standard time.

关键词： islanding detection neuro-wavelet intelligent

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Development of a Circuit-theory Based Transmission Cost Allocation Method by Orthogonal Projection and Equal-sharing Principle

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CSEE Journal of Power and Energy Systems 2019年第2期5卷 159-170页

作者： Saeid Pouyafar mehrdad tarafdar hagh Kazem Zare Department of Electrical and Computer Engineering University of TabrizTabrizIran.M.T.Hagh is also with Engineering FacultyNear East University99138 NicosiaNorth CyprusMersin 10Turkey

This paper presents a new solution to the problem of transmission cost allocation to its *** proposed technique utilizes modified Z-bus theory,equivalent current injection and impedance of the generators and loads,and is developed by the equal-sharing as well as the orthogonal projection *** procedure is performed in three ***,the modified Z-bus theory is used to calculate the contribution of the users into the network bus voltages as well as the branch ***,the equal sharing principle is confirmed by the game theory solutions and is subsequently applied to identify the users’contributions into the branch power *** that,the orthogonal projections of the contributions are calculated and the concept of effective contributions is *** proposed methodology provides the percentage shares of the users on the network complex variables,which help to better assess the contributions.A 2-bus and the IEEE 30-bus test system are used to validate the proposed ***,the proposed methodology is applied to the polish 2383-bus system to emphasize its applicability to large practical systems.

关键词： Effective contribution equal sharing of interaction-terms modified impedance matrix orthogonal projection concept transmission cost allocation

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