会议名称：IEEE ICPES 2018
全称：2018第八届IEEE电力与能源系统国际会议 （2018 8thIEEE International Conference on Power and Energy Systems）
报告题目：Bi-objective Mixed Optimal Planning for Distributed Energy Storage System of Active Distribution System（陈维伟）
报告摘要：In this paper, a novel bi-objective mixed optimal planning method for distributed energy storage system in active distribution network is designed to take account of both feasibility and comprehensiveness planning. The direct and indirect objects of optimal planning are respectively designed to represent the effect and cost of distributed energy storage system. Above two optimal objects are integrated through dimensionless processing. The weights of two optimal objects are determined through the combination of relative comparison method and entropy method. Based on historical data, simulation on IEEE-33 nodes radial distribution network is set up and analyzed by using LINGO and MATPOWER. The simulation results demonstrate the effectiveness of the proposed method.
报告题目：Cascaded Three-phase Quasi-Z Source Photovoltaic Inverter（黄国航）
报告摘要：A multiplexed inverter topology cascaded by line voltage is proposed, which composes three modules: PV panel, quasi-z source network and three-phase inverter. Through an analysis of the function feature of established mathematical model, an improved dual-loop control system is proposed. Voltage boost is added in the improved dc side, where 180V PV input voltage of each module can realize 380V direct grid-connection without transformer. Costs and switch frequency are decreased. The proposed control methodology is fit in three-phase grid-connection generation system with new energy.
报告题目：Mechanism Analysis of Sympathetic Inrush in Traction Network Cascaded Transformer based on Flux Linkage-Current Circuit Model（席凯龙）
报告摘要：There may be sympathetic inrush in traction substation transformer when electric multiple unit passing neutral section devices, which may result in the misoperation of different protection and back-up protection. This paper proposes a new mechanism analysis method of sympathetic inrush in traction network cascaded transformer based on flux linkage-current circuit model. This paper firstly build the equivalent circuit of the traction network and electric multiple unit (EMU) coupling system through analyzing its structure, and then build flux linkage-electrical current model for each unit of the equivalent circuit, all of which make up the flux linkage-current circuit model. Based on the flux linkage-current circuit model, this paper analyses the reason why the sympathetic inrush of the traction substation transformer produces and the influence of remanence, over-phase closing phase angle, line impedance and transformer saturation on the sympathetic inrush. A simulation is carried out in this paper, and the sympathetic inrush of the traction substation is resulted from the superposition of the DC flux linkage and AC flux linkage over the critical saturation flux linkage which goes into the flux saturation area.
报告题目：Cascaded Z-source Inverter Control Based on Bidirectional Positive and Negative Sequence Decoupling（陈维伟）
报告摘要：Cascading technology attracts attention for its advantages of adapting to high-power, high-voltage power electronic converters. Various cascaded topologies and related control techniques have been proposed. This paper focuses on the cascaded three-phase Quasi-Z source photovoltaic (PV) inverter, which consists of a ZSI module and a line voltage cascade mode. The ZSI module includes a photovoltaic panel, a Quasi-Z source network and a three-phase inverter. When the transmission power is unbalanced, the characteristics of the inverter are analyzed, and the corresponding mathematical model is established. According to the characteristics of bidirectional energy transfer between ZSI modules, a bidirectional positive and negative sequence decoupling control algorithm is proposed, which can realize DC side voltage sharing and suppress negative sequence component. The effectiveness of the control algorithms is verified by simulation results.