西山煤电集团公司前山矿区煤质特征及其应用

介绍了西山煤电集团公司前山矿区现开采煤层的煤质特征及其变化规律,并结合煤质特征进行了应用分析。     

铝制沐浴水热回收器的初步设计

对一种新型的铝制沐浴水热回收器进行初步设计。该沐浴水热回收器具有成本低,回收效率高等优点。介绍其工作原理,并以某三口之家为例,计算该热回收器的节能效益。结合沐浴水余热使用情况不合理的现状,讨论其发展前景。     

浅析阶梯电价应用中的问题及发展前景

阶梯电价作为电价改革的重要举措提出来以后,受到社会广泛的争议,究竟是让用户合理承担用电成本,还是供电企业变相涨价,一时间众说纷纭,文章将从阶梯电价应用的必要性入手,分析阶梯电价在应用过程中将遇到的问题,并对发展前景进行了论述。     

用电信息采集系统上线率低问题浅析

结合固原电网用电信息采集系统改造过程出现的各类问题，从集中器与主站召测数据有误和集中器与采集终端召测有误两方面，分析了系统改造后上线率偏低的原因，并提出具体解决措施，为今后的用电信息采集系统改造提供参考。     

模/ 数混合集成电路中的数字开关噪声分析

本文分析了静态CMOS逻辑开关在模 数混合集成电路中的开关特性、噪声特性、功耗及功耗延迟积等对其性能的影响 ,并提出用电流控制逻辑结构代替静态CMOS逻辑 ,实现低电压工作性能和峰值噪声电流下降     

对电现象的一些思考

探讨了有关电的几个概念的起源，讨论了电荷具有哪些性质，电现象遵从什么规律，进而回答了什么是“电”的问题。     

钢铁企业电力负荷预测建模研究

针对钢铁企业负荷波动特点,用分解及分类建模的思想,构造负荷预测模型。综合考虑各用电环节的用电特点、工况和工艺信息,分类建立模型,通过各用电环节预测结果叠加获取总负荷预测值。该模型运用静态预测和动态预测相结合的方法,在动态预测过程中充分考虑到实时工艺节奏和动态工况信息,使模型具有更好的适应性。实例表明,该预测模型能获得良好的预测效果。     

Modelling peak electricity demand

This paper estimates a forecasting equation for the hourly peak electricity demand one day in the future. The models incorporate deterministic influences such as holidays, stochastic influences such as average loads by building bivariate models, and exogenous influences such as the weather which is given a careful non-linear formulation. Out-of-sample comparisons are made using an additional year of data.     

Forecasting system energy demand

This paper presents the results of the Electric Power Research Institute Short Range Forecasting Project (EPRI-SRF) performed by the Load Forecasts Department, Economics and Forecasts Division of Ontario Hydro, Ontario, Canada. In this study a variety of short-range forecasting techniques are applied to Ontario Hydro monthly data on total system energy demand. These techniques are available in a software package (FORECAST MASTER) developed for EPRI by two consultants—Scientific Systems, Inc. (SSI) and Quantitativ Economic Research, Inc. (QUERI). The methods used for this study were the univariate Box-Jenkins method, the multivariate state-space method, Bayesian vector autoregression and autoregress ve econometric regression. A comparison of the models developed show that the econometric models perform the best overall. The state-space models are more suitable for very short-term (one-step ahead) forecasts. Although the Box-Jenkins method has the advantage of simplicity in terms of estimation and data requirement, its performance was not as good as that of the others. Bayesian vector autoregresson results indicate that this program needs some modification for monthly data.     

水泵自动化控制系统在矿井节能减排的应用

目前国家对于煤矿单位的安全生产比较重视,对于煤炭生产单位来讲,不仅仅对其要求矿井水泵控制系统自动化具备良好的安全性和可靠性,还要求排水系统具备良好的节能减排效果。笔者在下文中主要是针对荫营煤矿在生产中如何实现矿井大型设备节能减排做分析,从分级水库水位差的利用,PLC技术编程的使用和嵌入避峰填谷等相关方面进行简要的探讨。