220kV母线电量不平衡率异常的分析

分宜发电厂220kV升压站改造后母线电量不平衡率异常,分析其原因为改造后三相三线制计量方式在负荷不平衡情况下出现误差,提出了将三相三线制改造为三相四线制计量方式,以降低电量不平衡率,改造后电量计量与理论分析结果一致,不平衡率达标。     

“双碳”目标下北京市某既有建筑节能减碳潜力分析

为了探究“双碳”目标下既有建筑节能减碳实施路径及其减碳潜力，以北京市某公共建筑节能减碳改造为例，选取围护结构改造、冷热源机组能效提升、照明节能改造、节水器具改造、光伏设施改造等5种常见可量化节能减碳技术，进行节能减碳潜力评估。结果显示：5种节能减碳技术的平均减碳量为249 205.06 kg/a，屋面增设太阳能光伏设施的减碳效果比较显著，超过159 757.00 kg CO₂，占总减碳量的64%以上，其次是空调能效改造和围护结构改造，占比达到13.64%和12.53%，节水器具改造的减碳量相对较少，占比仅达到1.0%。5种减碳措施中，增设太阳能光伏设施的减碳效果最好，在经济适用、安全可靠的前提下，优先增设太阳能光伏系统。     

电量远传技术在宝鸡供电局的改造与发展

介绍了电量远传技术的发展、应用的主要作用。通过对宝鸡供电局电量远传技术以前 的应用和改造后新系统功能的完善进行比较和分析,从而说明对企业的发展和效益的增长有 着重要意义。     

火电厂环保设施能耗分析及节能降耗技术探讨

介绍了火电厂超低排放改造后环保设施的总体能耗情况,分析了环保设施能耗对增加厂用电率的总体影响。通过对三大环保专业(脱硝、除尘、脱硫)的能耗进行详细阐述,明确了超低排放改造以后环保设施的能耗关键点,最后结合当前环保设施运行管理经验和行业发展趋势,探讨和总结了超低排放改造后环保设施的具体节能降耗技术。通过系统性的分析和全面的总结,为火电厂环保专业节能降耗提供技术支撑,以确保环保设施的经济运行。     

整车开发过程中供电系统的设计与验证——针对汽车的电量耗用平衡的分析

对世界范围内的供电系统相关零部件以及整车进行电量耗用平衡分析，涉及到温度电耗的关系分析，CAD建模的空间需求与电量关系分析，电量平衡数学模型的建立，数据采集实现方式，用户路况行驶概率统计，发动机转速概率分布。     

单元制机组厂用电源受电方式的优化与改进

分析和研究单元制发电机组厂用电源的运行方式，提出厂用电源受电方式优化与改进方案，通过理论论证和现场实践证明：该改造方案是可行的，能够大幅降低购网电量，取得可观的经济效益，在同类型单元制机组中具有较好的借鉴意义。     

浅谈我国分布式发电

分布式发电是指在用户所在场地或附近建设安装,运行方式以用户端自发自用为主,多余电量上网,且以在配电网系统平衡调节为特征的发电设施或有电力输出的能量综合梯级利用多联供设施。     

水光互补系统对龙羊峡水电站综合运用影响分析

为了分析水光互补系统对龙羊峡水电站水量电量以及电网运行方式的影响，对光伏电站和龙羊峡水电站发电特性进行分析，并进行水光互补方式电力电量平衡计算和日运行方式模拟计算。结果表明，光伏电站对龙羊峡水电站备用容量、负荷率、水量电量等方面有一定影响，龙羊峡水电站需要同时满足补偿光伏和电网运行要求，运行调度复杂性及难度增加。     

T型双阀滤池改造成气水反冲洗滤池的探讨

为适应当前生产发展和环境的需求，适应蛇口工业区日益增长的需水要求，全面提高供水质量满足城市发展的需求，对现有水厂滤池等设施进行改造，节水节能，降低生产成本，经济效益显著。     

330 MW机组风机高压变频改造方案及节能潜力分析

为降低厂用电率、提高机组的节能效益,本文针对神华宁夏国华宁东发电有限公司330 MW机组锅炉风系统的一次风机和二次风机运行状况及存在问题进行了分析,提出了相应的变频改造方案,并对设备能耗与变频改造方案的节能潜力进行了分析。通过对两个机组的年预计节约电量计算,表明该改造方案具有较大节能潜力,对同类机组的改造有一定借鉴意义。     

基于电价波动率的现货电价风险度量研究

风险度量因子的选取是风险度量的核心工作之一,统计性质好的指标通常能降低建模复杂度,提高精度。根据电价序列的特征及电价风险度量模型的特点,提出以电价波动率替代电价作为风险度量因子,避开电价序列的非平稳性,建立GARCH-VaR模型用于现货电价风险度量,以北欧电力市场的电价风险度量为例,对模型的可行性和有效性进行检验,并将所提出的电价风险度量方法与电价波动率正态分布法、电价ARMA-GARCH模型度量的电价风险进行比较。结果表明,所提方法不仅能有效降低电价风险度量的模型复杂度,还可提高风险度量的准确性。     

中国电源结构的进一步探讨

中国电源结构长期煤电占极大比重,对此国内外专家看法不一。阐述了中国没有完成能源的几次大转换是导致中国以煤电为主的根本原因。2002年部分发达国家的电源结构表明,部分发达国家的煤炭主要用于发电,煤电在电源结构中的比重大大超过了煤炭在一次能源消费量中的比重。美国、欧洲、俄罗斯2005～2020年电力发展趋势的分析表明．在无温室气体减排规定的情况下,煤电的比重都呈上升趋势。国际能源署和国内专家的预测认为,中国未来的电源结构仍将以煤电为主。鉴于此,中国目前以煤电为主的电源结构是合理的。     

生物质能发电电价的敏感因素分析

通过设定电价敏感度和电价下降系数两个分析参数，对加工废弃物发电、秸秆发电、沼气发电和垃圾发电等4大类生物质能发电技术的电价敏感性因素进行了定量分析。分析结果显示．发电时间和固定资产为影响4类生物质能发电电价的主要敏感因素，其中固定资产通过规模化降低成本后会带来电价的减少。而原料成本仅对秸秆发电技术的影响较大。     

上海某高校研究生宿舍空调电耗特性研究

以上海某高校研究生宿舍空调电耗作为研究对象,统计分析了所有抽样房间(共12间,每间4人)全年空调电耗使用规律,并总结出典型日、典型月空调电耗指标以及与室外温度之间的关系.夏季空调电耗集中于7、8、9月,冬季空调电耗集中于12、1、3月(2月寒假放假).全年男、女生宿舍单位面积空调电耗差异不大,但与夏季相比,冬季单位面积...     

A data‐driven approach to study the role of interconnectors in a future low‐carbon electricity supply system

This paper investigates the potential role of the electricity interconnectors in improving the security of supply in Great Britain (GB) in 2030. Real electricity demand and price data for GB and France in 2016 were used to understand the relationship between power exchange between the two countries and their wholesale electricity prices. A linear programming optimisation model was developed to find the economic power dispatch. Two interconnection links were considered; two‐way trade interconnector with a capacity of 5.4 GW and a 12.3 GW import‐only interconnector between GB and other states. The GB–France link transmits electricity from cheaper system to the more expensive one. The total electricity demand in 2030 will be 406 TWh. Gas‐fired power plants w/wo CCS will provide 83 TWh of the total electricity demand, whereas nuclear power plants will produce 74 TWh. In addition, wind farms and solar PVs are expected to deliver ~120 TWh electricity. CHP units will provide 88 TWh electricity in 2030. The electricity traded between GB and France in 2030 was found to be 33 TWh, which is 160% larger compared with 2016. The power import from France is about 27 TWh and occurs in 59% of the time. For 64% of the time, the interconnector with France is fully loaded. The electricity imported via the 12.3 GW interconnector in 2030 is 1 TWh and mainly occurs during winter‐time when the demand in GB is high. De‐rated capacity margin was calculated based on instantaneous electricity demand and varies between ?2% and 139%. The impact of the price of the imported electricity via the 12.3 GW link was investigated. Increasing the price of the imported electricity via the 12.3 GW link results in a higher capacity factor for all the generation options except the 12.3 GW interconnector link.     

Market diffusion strategies for the PEM fuel cell-based micro-CHP systems in the residential sector: scenario analysis

At present, one of the most prominent support mechanisms for sustainable energy is implementing Feed-in Tariffs. This study analyzes Feed-in Tariffs for distributed electricity generation in Iran and Feed-in Tariffs for electricity generated by fuel cells in other countries. Based on reviews of the regulations and the support plans for renewable energy development, CHP generators, and fuel cells, four scenarios were designed for pricing the electricity generated from the fuel cells and how to support its market development. Based on these scenarios, the Feed-in Tariffs of electricity from fuel cells or the expected amount of support for each fuel cell unit was calculated. In the case of using a production tax credit (PTC) model, assuming the total export of the generated electricity to the grid, the cost per kilowatt-hour of electricity varied by 9.89–60.78 cent/kWh based on the utilization of different PEM fuel cell products of different companies. Using Iran's small-scale generator support guideline, the electricity generation cost was calculated between 7.032 and 57.921 cents/kWh.     

Psychological determinants of attitude towards and willingness to pay for green electricity

The results of a mail survey of 855 Swedish household consumers showed that willingness to pay for green electricity increased with a positive attitude towards green electricity and decreased with electricity costs. Attitude towards green electricity was in turn related to awareness of consequences of environmental problems for oneself, others, and the biosphere, concerns for these consequences, and self-transcedent value types.     

基于主客观赋权的电力市场风险综合评价研究

目的  随着国家对于电力市场体系建设的强调和推进,我国电力市场朝着更深入更统一的方向不断发展,为了促进电力市场建设,关于电力市场风险影响因素及其评价仍有待进一步研究。 方法  在考虑电力市场交易全周期的基础上,以事前风险、事中风险和事后风险为切入点,整合电力市场各阶段存在的风险,并建立电力市场风险评价指标体系。基于主客观赋权的思想,分别采用层次分析法（Analytic Hierarchy Process,AHP）和熵权法对指标体系进行赋权,采用模糊综合评价（Fuzzy Comprehensive Evaluation,FCE）对电力市场综合风险水平进行评价。 结果  通过不同电力市场的算例结果分析,证实了文章中所提模型的合理性、全面性和有效性。 结论  文章中所构建模型可对市场进行风险综合评价,为电力市场风险体系建设及未来发展方向提供理论参考。     

Integration of optimal combinations of renewable energy sources into the energy supply of Wang-An Island

This is a case study of Wang-An Island's energy demands and potential renewable energy sources (RESs). Optimal integration of RESs was simulated using the EnergyPLAN model. The RES evaluation indicated an annual production potential of 458.1 GWh, which substantially surpassed local energy requirements of 22.3 GWh. The potential of yearly electricity generation from RESs of 299.7 GWh apparently outnumbers local electricity demand of 6.4 GWh as well, indicating that 100% renewable electricity would be achievable if surplus electricity can be stored and then reused during an electricity deficit. Electricity production from fully exploited RESs is able to supply only 5.8 GWh of electricity mainly caused by mismatches in times of electricity demand and production. The integrated optimization can supply 3.7 GWh of electricity. A deficit of 2.68 GWh can be compensated for through electricity storage or biomass energy. Although the total amount of generated renewable electricity during the whole year cannot yet satisfy the total amount of yearly demand, electricity storage can help to satisfy most of the electricity needs for the year.     

Economic feasibility of electricity production from energy plantations present on community-managed forestlands in Madhya Pradesh,India

This paper assesses economic feasibility of utilizing community-managed degraded forest areas for raising energy crops and using the produced biomass for electricity production in the state of Madhya Pradesh, India through gasification technology. Three fast-growing species, three gasifiers of different capacities, three capital costs, and two scenarios of carbon payments were considered for analysis. Sensitivity and risk analyses were undertaken for determining the effects of variations in inputs on selected outputs. Results suggest that 5 million megawatt hour electricity can be generated annually which will prevent 4 million tons of carbon dioxide emissions per year. The production cost of a unit of electricity was found inversely related to the scale of production. The average cost of electricity at the consumer level produced using 100 kW gasifier was $0.15/kWh, which was greater than the price of electricity supplied from grid i.e. $0.08/kWh. The unit cost of producing electricity using Acacia nilotica was lowest among all the selected species. Technological advancements suitable government incentives are needed to promote electricity generation from forest biomass through gasification technology. This will help in spurring economic development and reducing overall ecological footprint of the state.