计及风电出力惩罚成本的电力系统经济调度

风电出力具有随机性和间歇性的特点,如何在经济调度模型中处理大型并网风电场模型是长期以来关注的热点.为此,引入高估出力期望、低估出力期望以及惩罚成本系数的概念,在此基础上,提出了计及风电出力惩罚成本的电力系统经济调度模型.通过在目标函数中引入惩罚成本,使优化结果兼顾了风能的利用率和总经济成本.算例结果验证了该方法的有效性.     

基于移动手持终端技术下的客户经理网格化服务模式应用分析

本文主要论述了基于网格化服务概念和背景,移动手持终端的建设,并探讨了移动手持终端的应用成果,以及建立基于手持终端技术下的"电力服务柜台"模式.     

大规模风电接入的电力系统低碳经济调度

以大规模风电并网为背景,以实现有效接纳风电和低碳经济调度这两大目标为目的,在考虑到风电所具有的波动性和随机性的基础上,通过引入穿透因子,并对风电概率特性进行分析,提出一种将风电作为约束的经济调度模型。在此模型中,通过引入排放价格因子这一权重系数将原有的双目标优化问题转化为单目标优化问题,并在此基础上建立了一种兼顾经济高效和低碳环保的目标函数。本文以一个含9台常规燃煤机组和1个大型并网风电场的电力系统为例进行仿真分析,其数值结果验证了所提模型的有效性。     

Effect of gas flow on the nanoparticles transport in dusty acetylene plasmas

This article presents simulation results on the effects of neutral gas flow for nanoparticle transport in atmospheric-pressure, radio-frequency, capacitively-coupled, and acetylene discharge. The acetylene gas is set to flow into the chamber from the upper showerhead electrode. The internal energy of the gas medium therein is transferred into kinetic energy so the gas advection can be triggered. This is represented by the pressure volume work term of the gas energy converse equation. The gas adv...     

新电改形势下地区供电公司服务模式与售电业务研究

自新一轮电力体制改革以来,各类对售电商业模式的研究层出不穷,本文的研究对象为电网企业经营的售电业务。本文在梳理国外售电公司商业模式的基础上,结合国内实际情况,从本地化营销服务、客户关系管理、售电账单管理与售后营销以及电力用户大数据分析这4个方面探索地区供电公司提升服务的电力营销创新模式,提出了增量配电网一体化、独立售电以及综合能源服务3种售电业务。     

The effects of dilution gas on nanoparticle growth in atmospheric-pressure acetylene microdischarges

A two-dimensional multi-fluid model is developed to investigate the effects of dilution gas on microplasma properties and nanoparticle behavior in atmospheric-pressure radio-frequency acetylene discharges. The percentage of dilution gases (argon and helium) percentage varied from 0% to 90%, with the pressure kept constant. Simulation results show that the dilution gas percentage has a significant influence on the spatial distributions of the electron density and temperature, as well as on the formation of nanoparticles in acetylene microplasmas. With increasing dilution gas percentage, the electron density profile changes continuously from being high at the edge to high in the center. A mode transition from a mixed discharge mode with both α regime and drift-ambipolar regime into α regime occurs, which is associated with a sudden decrease in the electron density of the presheaths and an increase in the electron temperature of the bulk plasma. The mode transition point corresponds to the lowest number density ratio of hydrocarbon ions to acetylene. The highest number density ratio is observed at a dilution percentage of 90%, and causes more effective nucleation and coagulation of nanoparticles. Furthermore, owing to the high ionization potential of helium, the transition point moves to a larger dilution gas percentage in ${{\rm{C}}}_{2}{{\rm{H}}}_{2}$/He microplasmas. Finally, the growth of nanoparticles via coagulation is studied.