Optimal Configuration Method for the Installed Capacity of the Solar-Thermal Power Stations

Because of the randomness of wind power and photovoltaic(PV)output of new energy bases,the problem of peak regulation capability and voltage stability of ultra-high voltage direct current(UHVDC)transmission lines,we proposed an optimum allocation method of installed capacity of the solar-thermal power station based on chance constrained programming in this work.Firstly,we established the uncertainty model of wind power and PV based on the chance constrained planning theory.Then we used the K-medoids clusteringmethod to cluster the scenarios considering the actual operation scenarios throughout the year.Secondly,we established the optimal configuration model based on the objective function of the strongest transient voltage stability and the lowest overall cost of operation.Finally,by quantitative analysis of actual wind power and photovoltaic new energy base,this work verified the feasibility of the proposed method.As a result of the simulations,we found that using the optimal configuration method of solar-thermal power stations could ensure an accurate allocation of installed capacity.When the installed capacity of the solar-thermal power station is 1×106 kW,the transient voltage recovery index(TVRI)is 0.359,which has a strong voltage support capacity for the system.Based on the results of this work,the optimal configuration of the installed capacity of the solar-thermal power plant can improve peak shaving performance,transient voltage support capability,and new energy consumption while satisfying the Direct Current(DC)outgoing transmission premise.

Equivalent Substitution Based Method for Calculation of Best Installed Capacity of Pumped Storage Power Station

This paper proposes a novel method to calculate the best installed capacity of pumped storage power station. First, we choose the day with maximum load as the typical day for every month and simulate the system running in two cases of whether the pumped storage power station is put into operation. The difference of the total coal consumption between the two cases is the peak load shifting benefit. Furthermore, we build load model and power generation model to calculate the benefit of emergency use and frequency modulation, which are the major projects of dynamic benefits. At last, on the premise of ensuring the system requirements, the developed method employs the maximum benefit of the unit capacity as the objective function to get the best installed capacity of pumped storage power station by simulations. Tests on a provincial power grid have shown that the developed method which combines of load characteristics, electric structure and other factors can get the best installed capacity of pumped storage power station easily and has a certain guiding significance for the planning and construction of the pumped storage power station.

China's installed renewable power capacity exceeded 1 billion kW

According to the statistics of energy industry,China's installed capacity of renewable energy power reached 1.002 billion kW in 2021,accounting for 43.5%of the country's total installed capacity,which was 10.2 percentage higher than that of 2015.In the total renewable energy power,the installed capacities of hydropower,wind power,solar power and biomass power reached 385 million kW,299 million kW,282 million kW and 35.34 million kW,respectively,continuing to be the number one in the world.

Installed capacity of coal seam gas power generation exceeds 480 MW under SGCC's coverage

The journalist learned from the "National Gas Security Working Conference" held recently that the coal seam gas power generation has been rapidly developed in recent years.As of July 2009,within the SGCC's business area,the power generation

基于系统动力学模型的光伏发电装机容量推演分析方法

针对政策、市场、技术等不同因素对光伏发电装机容量增长的影响,提出基于系统动力学模型的光伏发电装机容量推演分析方法。首先,计及电力系统消纳能力对光伏发电装机容量的影响,建立光伏发电装机容量推演分析模型;然后,利用系统动力学刻画关键影响因素的因果反馈关系,建立了系统动力学因果回路图;最后,给出系统动力学模块的建模方法。算例分析表明,所提模型能够定量分析不同因素对光伏发电装机容量的动态调控作用,准确反映未来光伏发电装机容量发展趋势。

分布式光伏发电在某水泥厂的应用

水泥制造企业在其厂区内构筑分布式光伏电站及智慧型微电网可增加生产流程中的可再生能源利用效率。在介绍项目分布式光伏发电系统概况基础上,本文对广东塔牌集团某分公司分布式光伏项目实际运行进行分析测算,根据该年度光伏电站所发电量,按照煤耗为301.5 g/kWh计,可为电网节约标煤约1541 t,综合节能减排效益显著。

基于电源优化规划的河南省抽蓄电站规模分析

河南电网目前调峰电源所占比重少,主要依靠火电机组深度调节来满足调峰需要,影响电网的安全经济运行。抽水蓄能电站具有削峰填谷双倍调峰作用,是电网中经济可行的调峰电源。采用电源优化扩展规划模型,对规划水平年不同电源方案进行优化比选,分析满足电网电力电量和调峰需求的抽蓄装机规模。结果表明:建设抽水蓄能电站能够有效减小火电机组调峰深度,减少系统煤炭消耗,保障电网安全经济运行。

利用已建水库建设抽水蓄能电站装机容量选择研究——以泸西抽水蓄能电站开发为例

利用已建水库建设抽水蓄能,在电力系统空间充足且项目技术经济可行的情况下,充分利用已有水库有利条件选择较大的装机容量,可减少电力系统整体投资,节约国土资源和生态空间,但也面临一些关键技术和利益协调问题需重点关注。以泸西抽水蓄能电站为研究对象,提出了利用已建水库、库盆地形地质条件好的抽水蓄能电站装机容量论证思路及关键影响因素,总结形成了相关设计要点及建议。该研究成果可供其他类似工程设计借鉴。

基于PVsyst的单面与双面光伏组件最佳安装倾角对比

随着光伏发电技术不断进步,单面光伏组件与双面光伏组件的价差不断缩小。得益于发电量增益大,双面光伏组件在实际项目中受到愈来愈多的青睐。当光伏发电项目采用单面或双面光伏组件时,光伏组件的最佳安装倾角成为一个重要的考虑因素。选取了3个太阳能资源等级地区,利用PVsyst对在这3个地区建设的光伏电站分别采用单面和双面光伏组件时的安装倾角与光伏电站首年发电量及光伏组件正面接收的太阳辐照量之间的关系进行了仿真模拟。得到以下结论:1)以光伏电站首年发电量最大为衡量标准时,双面光伏组件的最佳安装倾角大于或等于有阴影遮挡的单面光伏组件的最佳安装倾角,但小于无阴影遮挡的单面光伏组件的最佳安装倾角。2)就单面光伏组件而言,无阴影遮挡条件下增加光伏组件安装倾角带来的发电量增益高于有阴影遮挡安装条件时。3)在无阴影遮挡情况下,在一定范围内增大单面光伏组件的安装倾角可以相应提升其发电量;相对于双面光伏组件,无阴影遮挡的单面光伏组件通过适当提高其安装倾角所获得的发电量增益较小,且增大安装倾角,光伏阵列之间的间距也需要相应增加,这会增大用地量,从而增加项目总成本。因此,在实际项目中,尽可能采用双面光伏组件是一个较为理想的选择。

有限空间屋面分布式光伏系统安装倾角选择策略

研究有限空间屋面考虑阵列阴影遮挡的分布式光伏系统太阳辐照计算模型,并选取我国有代表意义的8个城市,研究不同安装倾角对项目装机量、发电量和资本金收益率的影响。结果表明:对于有限空间屋面上的分布式光伏项目,不必采用年总辐照量最佳倾角作为安装倾角,适当降低安装倾角,可在基本不影响资本金收益率的前提下,显著增加装机量和发电量,此现象对于高纬度地区项目更加明显。

平价时代江苏海上风电的应对之策

国家发改委要求2022年新增海上风电不再纳入中央财政补贴,海上风电进入平价阶段,产业增速有所放缓。广东、浙江、山东和上海先后出台海上风电省补政策,帮助企业平稳度过平价阶段。江苏作为海上风电的先行地区,2022年海上风电新增装机降幅高达80%。究其原因,一方面是受国补退出的政策影响,另一方面是由于海上装机达到一定规模后出现的资源瓶颈限制。文章在分析全球和我国海上风电发展现状的基础上,总结了江苏海上风电面临的瓶颈问题,提出了推动江苏海上风电产业发展的几点政策建议。

三星选煤厂降低用电成本的探索与实践

选煤生产过程中大型设备使用较多,加强选煤厂用电管理对稳定电力输送、提高能源利用、降低洗选加工成本等均具有重要意义。针对三星选煤厂因用电单耗高、电费单价高等原因造成的电费成本较高的问题,在分析电费组成及电费影响因素的基础上,结合当前电力体制改革政策,通过提高生产效率、缩短生产故障停时、细化生产组织管理、避高峰组织生产、降低力调电费等措施,来降低三星选煤厂用电成本。改进措施实施后,三星选煤厂装机总功率由原来的2794kW降低至2778kW;原煤处理量由280t/h提高至380t/h;生产故障停时由每生产100h停3 h缩短至1 h;总的生产时间中“谷时段”生产的比例由45%提高至60%左右。通过改进,吨原煤用电成本由4.25元降低至2.79元,每年可为企业节约电费175.2万元,10个月可收回成本。

海上风电自升式安装船能力及趋势分析

海上风电是新能源产业的重要组成部分,其建设和运营受到了政府和社会的广泛关注。作为海上风电的重要施工工具之一,自升式安装船的发展趋势也备受瞩目。通过分析未来几年我国海上风电发展趋势,详细论述自升式安装船的市场存量和施工能力,并从船舶尺度、吊高能力、吊重能力、桩腿长度、甲板载荷、可变载荷等方面展开研究,可为自升式安装船的进一步发展提供参考。

庆元抽水蓄能电站装机容量选择研究

为研究浙江省庆元抽水蓄能电站技术经济合理的装机容量指标,着重分析了浙江省抽水蓄能电站需求空间及本工程的建设条件等主要影响因素,拟定了3个装机容量方案,重点针对工程布置方案、电力系统作用及经济指标等方面开展技术经济综合比较,以技术经济优、电力系统贡献大为原则,提出了推荐方案。研究思路可为同类型抽水蓄能电站装机容量选择提供参考。

Study of future power interconnection scheme in ASEAN

The current energy supply trajectory in the Association of Southeast Asian Nations(ASEAN)region is not sustainable.Factors such as rising standards of living and demographic patterns,including population growth,lead to continuous increase in power demand,which is difficult to meet using limited fossil fuel resources.Thus,a transition toward clean energy sources is needed in the region.While ASEAN member countries are rich in clean energy resources,such resources are located far from demand centers;thus,allocation of clean energy is necessary to increase its utilization.In this study,power demand is forecasted using a combination of prediction methods.A model to evaluate the installed capacity and power exchange potential is proposed to deal with mismatch between the location of the clean energy base and the load center.Furthermore,the concept of cross-regional allocation of clean energy between the ASEAN region,China,and South Asia is presented.A power interconnection scheme among the ASEAN member countries as well as neighboring countries is proposed based on the power exchange potential.The proposed grid interconnection scheme contributes to the utilization of clean energy in the ASEAN region,increasing the proportion of clean energy in the generation mix,which ensures that the region becomes a sustainable and resilient society with a clean and low carbon development route.Furthermore,the proposed power interconnection scheme will generate valuable economic,social,environmental,and resource allocation benefits.

Northeast china Power System Striding to the 21st Century

Northeast China is one of the mostcentralized industrial areas in China. in whichthere are abundant natural resource.convenient transportation of railway andhighway, solid industrial basc. large-sized undmedium-sized state-owned enterprises as theleading role in national economy.higherindustrial level than domestic average level. Itprovides a good chance to develop the e1ectricDOwer industrv. Northeast China electricpower network was formed in theearliest time of the five domesticelectric power networks serving formore than one proxince. It hasranked first in installed capacity andfixed capital for past many yearscontinuously. Following theprogress of reform and opening to outside world. rapid development ofnational economic construction andrise of people’s living standard inurban and rural regions, the power system is ata new vigorous stage of development.Beforethe coming of new century. We are sure thatmore and more development potential of thepower system wi1l be brought into play and thepower system will stand at first rank of powersystems.

Current Situation of Power Development in the World and Its Enlightenment to China's Power Industry

Based on a detailed analysis of China's current power installed capacity,power generation,power structure,as well as the world's power installed capacity,power generation,power structure,and power regional distribution,some policy suggestions have been put forward through objective analysis and comparison.Firstly,power sectors in China should develop from high-speed growth to high-quality development,digest power excessive production capacity,control newly-added production capacity absolutely,and control the construction of power points orderly according to power planning.Secondly,non-fossil energy power generation needs to develop energetically,and should attach great importance to biomass power generation,in addition to gas power generation,wind power,and solar power.Lastly,on the basis of building a moderately prosperous society in all respects,electricity consumption per capita should be improved in the high-quality development stage in China,and the development of energy conservation and emission reduction,renewable energy,and distributed energy and so on should be considered collaboratively.

APRICING METHOD of SURPLUS THERMAL POWER EXCHANGE BETWEEN GRIDS

This paper presents a case study on surplus thermal power being exchange between power grids and associate prices. The analysis shows the potential value of surplus thermal power exchange between grids under the condition whatever a grid is excessive or short in capacity.

Problems of Planning for Power Industry in China

On the basis of summing up the development of electric power industry in the 10th Five-Year Plan period, the idea of electric power development planning from 2006 to 2020 is presented. The authors analyzed ten main problems that existed in electric development during the 10th Five-Year Plan period, forecasted the electricity generation from 2006 to 2020, put forward the development strategy of power industry, discussed the component and development program of hydropower, thermal power, nuclear power, natural gas power and renewable power, outlined the present situations of six regional power grids, power transmission from western to eastern regions, UHV AC/DC power transmission and nationwide power grid interconnections, and finally gave out seven suggestions about electric power development in the future.

我国典型5省煤电发展现状与转型优化潜力研究

地方省份是我国电力系统中长期规划和运行控制的主体,选择山东、山西、福建、湖南和海南这5个典型省份进行了煤电转型优化潜力和路径的分析研究。基于近期和中期上述各省电力的供需形势,在考虑省政府的电力发展规划、电力电量平衡和各省非煤资源发展潜力的约束下,依托于煤电机组装机大小、服役年龄、供电煤耗等要素的评估分析,为不同省份煤电机组提供了转型优化发展路径,并量化了相关结果。由于5省电力行业发展现状、清洁能源禀赋条件、经济发展水平、地理位置等各不相同,煤电合理装机规模和转型优化路径存在巨大差异,因此对5省煤电转型优化提出了不同的、有针对性的政策建议。