Design and analysis of an aging‐aware energy management system for islanded grids using mixed‐integer quadratic programming

The rapid increase of renewable energy sources made coordinated control of the distributed and intermittent generation units a more demanded task. Matching demand and supply is particularly challenging in islanded microgrids. In this study, we have demonstrated a mixed‐integer quadratic programming (MIQP) method to achieve efficient use of sources within an islanded microgrid. A unique objective function involving fuel consumption of diesel generator, degradation in a lithium‐ion battery energy storage system, carbon emissions, load shifting, and curtailment of the renewable sources is constructed, and an optimal operating point is pursued using the MIQP approach. A systematic and extensive methodology for building the objective function is given in a sequential and explicit manner with an emphasis on a novel model‐based battery aging formulation. Performance of the designed system and a sensitivity analysis of resulting battery dispatch, diesel generator usage, and storage aging against a range of optimization parameters are presented by considering real‐world specifications of the Semakau Island, an island in the vicinity of Singapore.     

Development of new energy management strategy for a household fuel cell/battery hybrid system

This work aims to construct an efficient and robust fuel cell/battery hybrid operating system for a household application. The ability to dispatch the power demands, sustain the state of charge (SOC) of battery, optimize the power consumption, and more importantly, ensure the durability as well as extend the lifetime of a fuel cell system is the basic requirements of the hybrid operating system. New power management strategy based on fuzzy logical combined state machine control is developed, and its effectiveness is compared with various strategies such as dynamic programming (DP), state machine control, and fuzzy logical control with simulation. Experimental results are also presented, except for DP because of difficulties in achieving real‐time implementation and much faster response to load variation. The given current from the energy management system (EMS) as a reference of the fuel cell output current is determined by filtering out various harmful signals. The new power management strategy is applied to a 1‐kW stationary fuel cell/battery hybrid system. Results show that the fuel cell hybrid system can run much smoothly with prolonged lifetime.     

90年代电网自动化的发展方向

根据３０年来电网自动化的发展历史及９０年代电网ＥＭＳ／ＤＭＳ的发展动向，结合当前在计算机技术和电力系统分析算法方面的发展，提出了９０年代电网的自动化将从传统的调度自动化向广义的调度功能一体化以至全电力公司的综合自动化方向发展。文中对９０年代电网自动化系统的构成平台及开放式分布式体系结构、特别是针对电网ＥＭＳ／ＤＭＳ的基础——分布式技术软件的构成问题进行了讨论。     

SD一6000EMS系统及其应用

ＳＤ一６０００是基于ＡＬＰＨＡ工作站的完全分布式的新一代ＥＭＳ系统。本文结合山东省淄博地区已投运的新调度自动化系统，从技术和应用两个方面简要介绍其硬件和软件结构，讨论其支持系统和软件功能，介绍ＳＤ一６０００的特点和先进技术。     

EMS系统在钢铁厂能源中心的应用

介绍了钢铁厂能源中心采用计算机网络构成的集中管理和远程遥控遥测的能源管理系统(简称EMS系统),分析了系统的软硬件结构、数据的采集和监控理念,并对该系统主要功能的实现进行了描述。     

数据挖掘技术在能量管理系统中的应用

长期运行的电力系统能量管理系统数据库积聚了大量的时态数据，有效地利用这些丰富的数据资源，并采用适当的数据挖掘技术进行处理，可以发现潜在的运行规律和知识，将有助于系统更高效更安全的运行。     

新型冶金连铸多流电磁搅拌装置计算机控制系统的研制

介绍一种冶金多流电磁搅拌装置计算机控制系统，该系统基于IBM－PC总线，具有开放式和多级分布式体系结构。文中概要讨论了系统的主要功能、组成原理和相关技术。     

EMS诱变甘蔗愈伤组织的初步研究

为了探索EMS对甘蔗愈伤组织进行化学诱变的合适浓度和时间组合,以ROC22和粤糖93-159甘蔗愈伤组织为材料,研究了不同浓度(8、24、40μmol/L)、不同时间(2、4、6 h)诱变处理对愈伤组织的每克鲜重相对增重量和相对分化率的影响。并通过分化试验选择适合诱变后愈伤组织分化的培养基。结果表明,适合诱变处理后愈伤组织分化的培养基为:MS基本培养基+2 mg/L KT+2 mg/L NAA+3.0%蔗糖(W/V)+0.8%琼脂(W/V)。适合EMS诱变甘蔗的处理为:24μmol/L诱变处理2 h或8μmol/L诱变处理6 h。     

采用GEPON技术改造湛江有线宽带数据网

本文主要探讨采用GEPON技术改造湛江有线宽带数据网解决当前发展面临的问题。     

The Application of the Theory of the Price Elasticity of Demand to the EMS Management

1　Introduction　ExpressMailService (EMS )wasopenedupbyChinaPostintheearly 80stomeettheneedsofeco nomicdevelopment.It sthemostcompetitiveoneofthepostservices.There recivilaviation ,Chinarail wayandotherprivateexpressdeliverycompaniesdomesticallyandUPS ,TNT ,DHLandTEDEXcompetingwithEMSintheinternationalmarket.OneofthemostpowerfulcompeteweaponofthesecompaniesisthelowerpricethanEMS[1 ] .BecauseofthefiercecompetitionEMSdeclinedfromthemo nopolistindomesticandinternationalmarketoftheear…