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基于改进G1-CRITIC的直流多馈入受端系统故障筛选与排序 被引量:6
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作者 王源 姜懿郎 +1 位作者 王长江 韩奕 《电力系统及其自动化学报》 CSCD 北大核心 2021年第12期43-52,共10页
为了快速、准确地实现直流多馈入受端系统交流故障筛选与排序,本文提出一种基于改进序关系分析-基于指标相关性的指标权重确定的直流多馈入受端系统故障筛选与排序方法。首先,为多层次、多角度表征直流多馈入受端系统的故障特性,构建了... 为了快速、准确地实现直流多馈入受端系统交流故障筛选与排序,本文提出一种基于改进序关系分析-基于指标相关性的指标权重确定的直流多馈入受端系统故障筛选与排序方法。首先,为多层次、多角度表征直流多馈入受端系统的故障特性,构建了暂态电压稳定、功角稳定、极限切除时间、平均三相短路电流过流率、潮流转移熵和多馈入有效短路比6个维度的综合评价指标;其次,为合理量化主观因素与客观因素所占权重,综合考虑电网运行人员的经验和指标数据的客观信息,借助改进序关系分析法和基于指标相关性的指标权重确定方法计算主观及客观权重,通过逼近理想解排序法计算各故障线路与理想解的相对贴进度,依据相对贴近度的大小实现故障筛选与排序;最后,通过华东电网实际系统的仿真分析,验证所提方法的有效性和实用性。 展开更多
关键词 改进序关系分析 基于指标相关性的指标权重确定 故障筛选与排序 高压直流输电
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抽水蓄能电站技术经济效益指标体系综合评价研究 被引量:18
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作者 高瑾瑾 郑源 李涧鸣 《水利水电技术》 CSCD 北大核心 2018年第7期152-158,共7页
为更科学合理地对抽水蓄能电站的技术经济效益进行综合评价,依据其技术经济效益特性选取了由运行效果、功能效益、财务效益和环境效益组成的指标体系。将改进型序关系分析法与熵权法结合,采用改进型序关系分析法确定主观权重、熵权法确... 为更科学合理地对抽水蓄能电站的技术经济效益进行综合评价,依据其技术经济效益特性选取了由运行效果、功能效益、财务效益和环境效益组成的指标体系。将改进型序关系分析法与熵权法结合,采用改进型序关系分析法确定主观权重、熵权法确定客观权重,并运用物元分析法建立综合评价模型,计算抽水蓄能电站技术经济效益的评价等级。根据某抽水蓄能电站的相关资料,采用定性和定量结合的方法来量化处理评价指标,建立相关评判标准,最终得到其技术经济效益综合评价等级。结果表明该电站技术经济效益大部分指标达到了预期,验证了该评价模型的适用性和有效性。通过研究结果分析得出该电站有待加强指标和已经达到标准的指标,便于有针对性采取相应措施提高电站技术经济效益,对今后电站的技术经济发展具有借鉴意义。 展开更多
关键词 抽水蓄能电站 技术经济效益 改进型熵权-序关系分析法 物元分析法 综合评价
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基于改进序关系分析法的抽水蓄能电站经济效益综合评价 被引量:11
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作者 高瑾瑾 郑源 李涧鸣 《长江科学院院报》 CSCD 北大核心 2018年第4期137-142,共6页
针对抽水蓄能电站的功能特点,提出了"辅助服务效益"的概念,建立了由财务评价、国民经济评价及辅助服务效益组成的经济效益指标体系。首先应用改进的序关系分析法确定各指标的权重值,将点赋值推广为区间赋值,从整体上提升了评... 针对抽水蓄能电站的功能特点,提出了"辅助服务效益"的概念,建立了由财务评价、国民经济评价及辅助服务效益组成的经济效益指标体系。首先应用改进的序关系分析法确定各指标的权重值,将点赋值推广为区间赋值,从整体上提升了评价效果。然后选取非线性方法无量纲处理定量指标,三角模糊数法量化处理定性指标,最终线性加权得到各指标的综合评价值。根据某抽水蓄能电站的部分实际参数计算相关评价指标,对算法的适用性及评价的逻辑性进行了验证。研究结果可为全面评判某抽水蓄能电站的经济效益提供参考。 展开更多
关键词 抽水蓄能电站 经济效益 辅助服务效益 改进的序关系分析法 综合评价
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考虑后效性的柔性直流输电黑启动方案评估方法 被引量:8
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作者 刘旭斐 吴琛 +2 位作者 张丹 黄伟 李鹏飞 《电力科学与技术学报》 CAS 北大核心 2020年第6期110-116,共7页
柔性直流输电黑启动能很好地维持换流母线的电压稳定,并有效抑制可能出现的过电压问题,在此背景下,提出一种考虑后效性的柔性直流输电黑启动方案评估方法。首先,介绍柔性直流输电的运行特性;其次,综合考虑表征方案优劣的初期恢复评价指... 柔性直流输电黑启动能很好地维持换流母线的电压稳定,并有效抑制可能出现的过电压问题,在此背景下,提出一种考虑后效性的柔性直流输电黑启动方案评估方法。首先,介绍柔性直流输电的运行特性;其次,综合考虑表征方案优劣的初期恢复评价指标和后效性评价指标,构建全面反映方案优劣的综合评价体系;然后,分别采用序关系分析法和改进CRITIC法确定主客观权重,在此基础上利用基于博弈论的组合赋权法求得各待评价指标的组合权重,并采用逼近理想解排序法对满足各类约束条件的柔性直流输电黑启动方案进行综合评价以确定其优劣程度。最后,以鲁西背靠背柔性直流通道对云南电网大停电后的供电恢复为研究背景,验证所提评估方法的有效性。 展开更多
关键词 柔性直流输电 黑启动 评估 序关系分析法 改进CRITIC法 逼近理想解排序法
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Appraisal of the Production-Oriented Approach: An Introduction 被引量:4
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作者 濮实 《Chinese Journal of Applied Linguistics》 SCIE 2017年第4期452-453,共2页
The production-oriented approach (POA) has been developed over a decade. It is driven by the need to improve English classroom instruction for university students in China (Wen, 2016). It is also motivated by the ... The production-oriented approach (POA) has been developed over a decade. It is driven by the need to improve English classroom instruction for university students in China (Wen, 2016). It is also motivated by the aspiration to enhance the quality of foreign language education in other similar pedagogical contexts outside China. A volume of research has been done by Wen Qiufang and her research team, to formulate the theory of POA and to test its effectiveness in classroom pedagogy (e.g. Wen, 2016, 2015; Yang, 2015; Zhang, 2015). At the moment, the POA is still at an early stage of theory building and almost all empirical research is done in the Chinese context. In order to improve the quality of this theory and to make it intelligible to the international academic community, a one-day symposium was held in Beijing Foreign Studies University on May 15, 2017. The symposium was entitled 'The first international forum on innovative foreign language education in China: Appraisal of the POA'. In the forum, leading experts in applied linguistics were invited to discuss the strengths and weaknesses of the POA and the directions for its future development. The symposium was the first attempt for the POA research team to discuss its latest work with international scholars. This Viewpoint section collects the responses of four experts who participated in the symposium, listed in alphabetical order. The collection of articles covers three topics related to the POA: its pedagogical application, its use for teacher training, and its research. Alister Cumming is Professor Emeritus and the former Head of the Centre for Educational Research on Languages and Literacies, University of Toronto, Canada. His article focuses primarily on POA research as an exemplary case of design-based research. Rod Ellis is Research Professor in the School of Education at Curtin University, Australia. He discusses POA in terms of pedagogy, teacher training and research, with both critiques and constructive suggestions. Paul Kei Matsuda is Professor of English and Director of Second Language Writing at Arizona State University, the writed states. He responds to POA from the perspective of an expert researcher and teacher of L2 writing. Charlene Polio is Professor and Associate Chair in the Department of Linguistics & Germanic, Slavic, Asian & African Languages atMichigan State University, the writed states. She conceptualises POA as a useful method to address some issues in pre-service teacher development. Overall, the articles in this section are insightful and reader-friendly. They are not only useful for the development of POA in particular, but may also be valuable to a broad range of researchers as they touch upon pertaining issues, as well as emerging topics, in the field of applied linguistics. We therefore find it necessary to make them accessible to a wide readership. 展开更多
关键词 The production-oriented approach (POA) has been developed over a decade. It is driven by the need to improve English classroom instruction for university students in China (Wen 2016). It is also motivated by the aspiration to enhance the quality of foreign language education in other similar pedagogical contexts outside China. A volume of research has been done by Wen Qiufang and her research team to formulate the theory of POA and to test its effectiveness in classroom pedagogy (e.g. Wen 2016 2015 Yang 2015 Zhang 2015). At the moment the POA is still at an early stage of theory building and almost all empirical research is done in the Chinese context. In order to improve the quality of this theory and to make it intelligible to the international academic community a one-day symposium was held in Beijing Foreign Studies University on May 15 2017. The symposium was entitled 'The first international forum on innovative foreign language education in China: Appraisal of the POA'. In the forum leading experts in applied linguistics were invited to discuss the strengths and weaknesses of the POA and the directions for its future development. The symposium was the first attempt for the POA research team to discuss its latest work with international scholars. This Viewpoint section collects the responses of four experts who participated in the symposium listed in alphabetical order. The collection of articles covers three topics related to the POA: its pedagogical application its use for teacher training and its research. Alister Cumming is Professor Emeritus and the former Head of the Centre for Educational Research on Languages and Literacies University of Toronto Canada. His article focuses primarily on POA research as an exemplary case of design-based research. Rod Ellis is Research Professor in the School of Education at Curtin University Australia. He discusses POA in terms of pedagogy teacher training and research with both critiques and constructive suggestions. Paul Kei Matsuda is Professor of English and Director of Second Language Writing at Arizona State University the writed states. He responds to POA from the perspective of an expert researcher and teacher of L2 writing. Charlene Polio is Professor and Associate Chair in the Department of Linguistics Germanic Slavic Asian African Languages atMichigan State University the writed states. She conceptualises POA as a useful method to address some issues in pre-service teacher development. Overall the articles in this section are insightful and reader-friendly. They are not only useful for the development of POA in particular but may also be valuable to a broad range of researchers as they touch upon pertaining issues as well as emerging topics in the field of applied linguistics. We therefore find it necessary to make them accessible to a wide readership.
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