220千伏输变电工程具有电压等级高、科技含量高、输送距离远、电量损耗小、响应速度快、可控性较好、运行方式灵活等特性，在我国电网建设中一直充当着绝对主力的角色，发挥了不可替代的巨大作用，成为国家电网公司全面打造坚强电网的重要支撑。
作者所在单位双鸭山电业局作为国家电网公司执行单元，肩负着在双鸭山2.24万平方公里供电区域内建设坚强电网的重任，仅“十五”末期、“十一五”、“十二五”期间，开竣工各电压等级输变电工程近40个，其中，220千伏输变电工程11个。在实施工程建设中发现，供电企业始终重电网建设、轻项目后评估的做法已无法满足现实发展需要，对电网建设项目后评估的要求变得越来越为迫切。因此，本文选择了在电网工程建设中具有代表性的骨干重点工程——TB220千伏输变电新建工程项目作为实证研究对象，该工程的后评估研究成果不仅为促进电网工程建设科学发展提供了对策和思路，而且具有非常重要的借鉴价值，对推动双鸭山市经济又好又快发展也具有重要意义。
该项目的实施实际收效明显，各项目标均达到预期，取得了良好经济效益和社会效益，区域电网主网结构得到有效改善，传输容量大幅增加，电力输送能力显著增强，供电可靠性和电网运行稳定性全面提高，供电卡脖子的问题得到彻底解决，为缓解当地电力供应输送压力起到了积极作用，为推动地方经济建设做出了巨大贡献。
关键词：
220KV，输变电工程，项目后评估研究
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Abstract
Post project evaluation is an important part of project management, the final part of project of infrastructure procedures and the realization and effective means of conventional methods of science degree evaluation project execution, object, purpose, effect,and efficiency. Mainly using the method of quantitative analysis and qualitative analysis, it is a kind of technical and economic activity aiming at the system life cycle which has been completed and put into operation the project objective, scientific analysis and evaluation. Through the project decision-making stage, the implementation stage and using stage activities of the entire process of inspection and summary, determine the main benefit index target investment project to be achieved, whether the implementation of the project decision to be made, project execution to be effective; through the analysis and evaluation to find success and failure causes, sum up the experience, lessons, and make continuous improvement; by collecting and consolidation project completed and put into operation each link information to be realistic effects, evaluation of actual operation project issues recommendations for improvement, in order to improve the operation of the project quality as well as to the future similar project decision-making, management, operation and maintenance and provide reference and practical methods on improving the decision level of management guidance, ensure project success and effective.
China electric power industry in the development speed, quality has created many of the world's first and China State Grid Corp which has been walking in the forefront of the line of duty provides plenty of power for the stable and rapid economic and social development. According to statistics by the end of 2011, it shows power generation in China reached 4.72 trillion million, for the first time China passed the United States, ranking first in the world; Transmission lines in China 220000 kV and above the loop length of 480000 km, substation equipment capacity reached 22 million KVA, grid scale ranked first in the world. With the UHV, inter-regional power grid, the regional and provincial power grid network, urban and rural distribution network construction as a whole, the grid structure in China has been significantly improved, power supply capacity of urban and rural power grid is enhanced significantly, the power universal service level improved significantly, greatly improving the residential electricity conditions. Although the construction of power grid in China has made brilliant achievements that attract worldwide attention, in accordance with the \development, the basic law of the development of electric power shall first\from meeting future objective situation and the reality of the rapid development of the economic society requirements analysis, with the development of the thermal power, hydropower, nuclear energy, wind power, solar energy, biomass and so on, the power distribution of speed, power grid backbone weak problem will become more prominent, long distance, large capacity power grid transmission capacity faces challenges,and
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strengthening the power grid structure, enhancing the transmission capacity, improving the reliability and stability of power grid operation and easing the power supply delivery pressure are still the current problems of power grid construction of universal and representative. Therefore, it is a pressing matter of the moment to speed up the construction of smart grid. Power transmission project which is an important part of power system plays an important role in power transmission, transformation, distribution, supply, with higher voltage levels, power supply range more widely, the influence degree of surface features and greater impact. 220000 power transmission project with high voltage, high technology content, long conveying distance, power consumption of small, fast response, good controllability, flexible operation and other characteristics, the construction of power grid in China has acted as the absolute main role, play a irreplaceable role, and has become an important support comprehensive China State Grid Corp to build a strong power grid.
The unit of Shuangyashan Electric Power Bureau is a China State Grid Corp execution unit, shouldering the strong power grid in Shuangyashan power supply region of 22400 square kilometers, in the period of \\Five-Year Plan\the completion of each voltage level transmission and substation project reached nearly 40, among which there are eleven projects of 220000 power transmission. Found in the implementation of the construction, power supply enterprises always pay more attention to power grid construction, rather than post project evaluation approach that has been unable to meet the practical needs. The power grid construction project post evaluation requirements become more and more urgent. Therefore, this paper chooses a representative in the power grid construction of key projects -- the backbone of TB220 kV power transmission construction project as the research object, research results not only provide the countermeasures and ideas to promote the scientific development of the power grid construction project, but also very important reference value, also important to promote sound and rapid economic development of Shuangyashan city.The implementation of the project actual effect is obvious, the targets are to achieve the desired, and achieved good economic benefit and social benefit, the structure of main regional power grid can be effectively improved, a substantial increase in transmission capacity, power transmission capacity significantly increased, the reliability of power supply and power grid stability improve, power card neck problems are completely solved, the positive to alleviate the local power supply delivery pressure, which has made great contribution to promoting the local economic construction.
Keywords:
220KV,Power transmission project, Post evaluation of project
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目 录
第1章 前言 ..................................................... 1 1.1 研究背景 ................................................... 1 1.2 研究内容 ................................................... 3 1.3 研究方法及思路 ............................................. 4 第2章 项目后评估相关理论综述 .................................... 5 2.1 经济理论在项目后评估中的应用 ............................... 5 2.1.1项目后评估中的微观经济理论 ............................. 5 2.1.2项目后评估中的成本效益理论 ............................. 7 2.1.3费用效益理论 ........................................... 9 2.2项目后评估中的具体方法 .................................... 11 2.3 项目后评估的发展趋势 ...................................... 13 第3章 输变电项目后评估评价体系 ................................ 19 3.1 项目实施过程中执行情况评估 ............................... 19 3.1.1 前期工作评价 .......................................... 19 3.1.2 工程建设评估 .......................................... 20 3.1.3 项目生产运行评估 ...................................... 21 3.2 经济效益评价 ............................................. 22 3.3 评价的影响与持续性 ....................................... 24 第4章 TB220千伏输变电工程项目的后评估 ......................... 27 4.1工程概况 .................................................. 27 4.2 该输变电项目执行情况分析 .................................. 29 4.3 该输变电项目经济效益分析 .................................. 33 4.4 该输变电项目影响与持续性分析 .............................. 35 4.5 该输变电项目综合评估及经验总结 ............................ 38 第5章 结论与建议 .............................................. 41 5.1 结论 ..................................................... 41 5.2 建议 ..................................................... 42 参考文献 ........................................................ 43 致谢 ............................................................ 45
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