抽水蓄能电站是水力发电站的一种形式,这种电站的建设要结合电动机的特点、电站的额定容量、发电机的功率、发电机的电压以及发电机的电压所在的范围和电动机本身的结构形式,另外在建设中还要和机器的结构类型和冷却方式等方面进行控制,对这些方面进行分析,能够很好的保证电站的建设。本文以江苏沙河抽水蓄能电站(简称沙河电站)应用实例分析,研究抽水蓄能电站发电电动机的特点与选型设计的相关内容。

Pumped storage power station is a form of hydro electric power station, the power plant construction should be combined with the characteristics of the motor rated capacity, power station, power of the generator, the voltage of the generator and the voltage of the generator''s scope and the motor itself structure, control in the construction and the structure of the machine type and cooling way, carries on the analysis to these aspects, to ensure the construction of power plants. Taking Jiangsu Shahe pumped storage power station application example analysis, research of pumped storage related content characteristics and type selection design of generator motor power.

在IGCC电站中，空气分离系统(空分系统)的能耗最高。如果能降低空分系统的能耗，将显著提高IGCC电站的供电效率。该文依托某IGCC示范电站，对IGCC电站独立空分系统空气压缩单元的2种驱动方式进行了分析比较，认为相比于电动机驱动方式，小型汽轮机驱动空气压缩单元的方式不仅有利于电站的启动，而且能使电站的供电效率提高0.47%，在低负荷工况下运行，提高的幅度会更加显著。为进一步提升电站经济效益，通过改造IGCC电站的余热锅炉，增加补燃装置，使其可以在空分系统启动时为小型汽轮机提供启动蒸汽，从而大大降低电站的初期投资。

ABSTRACT:The energy consumption of the air separation unit (ASU) in the integrated gasification combined cycle (IGCC) plant dominates the overall auxiliary power usage. Reducing the energy consumption of the ASU will greatly reduce the power consumption rate of the IGCC plant thus dramatically increasing the IGCC efficiency. Using a commercialized IGCC demonstration power plant as an example, a comprehensively comparative analysis was conducted for an isolated air separation unit. The results show that using a small steam turbine as the driving force for the air compressor unit of ASU has clear advantage over electric motor, since it is not only convenient for start-up but also more efficient in power generation. It may increase the power output efficiency by 0.47%. When operated at a lower load, the efficiency increase will be even higher. If the technology of supplementary fired heat recovery boiler is used in the heat recovery steam generator (HRSG) to provide the necessar

太阳辐照度和光伏电池工作温度等的随机性会对光伏电站并网后发输电系统的可靠性产生一定影响。为全面评估光伏电站并网后对电网可靠性的影响,根据光伏电站等值电路,推导了光伏电站的输出功率关系式。针对光伏电站发出的无功功率与接入点电压的密切联系以及光伏电站的故障特性,交替求解光伏电站的无功功率和电网潮流,并提出光伏电池组件的故障切除条件。对含光伏电站的发输电系统进行可靠性评估的算例表明,合理接入光伏电站能够改善系统可靠性,太阳辐照度和故障光伏电池组件切除方案也会对可靠性产生较大影响。

The randomness of the solar irradiance and the operation temperature of photovoltaic cells has certain influence on the reliability of the power generation and transmission system after the photovoltaic power station connected to the grid.In order to comprehensively evaluate the influence of the connection of the photovoltaic power station on the reliability of the power grid,the expression of the output power of the photovoltaic power station was derived based on the equivalent circuit of the photovoltaic power station.According to the close relationship between the reactive power and the access point voltage of the photovoltaic power station as well as the fault characteristic of the station,the reactive power of the station and power flow of the grid were solved alternately.The fault removal conditions of the photovoltaic cell components were also presented.The reliability of the power generation and transmission system of a photovoltaic power station was evaluated.The res

针对水库调度图常规制作方法的不足，按照梯级电站联合调度的要求，运用基于确定性优化调度模型的水库调度图改进和优化制作方法，结合水库调度函数进行梯级电站水库联合调度；以杂谷脑流域梯级电站水库联合调度为例，绘制了杂谷脑梯级电站中狮子坪电站的水库调度图，制定了薛城和古城电站水库运行策略，形成了杂谷脑流域梯级电站联合调度的决策方案。结果表明：用改进与优化制作方法绘制的水库调度图，满足了降低出力的要求，协调了不同的调度区域，提高了水库调度图的保证率、实用性和经济性；采用改进与优化调度图结合水库调度函数的调度方式，能形成有效的梯级电站联合调度决策方案，提高了梯级电站的联合调度发电量。

There are some deficiencies in the conventional methods of making reservoir operation chart. According to the requirements of joint dispatching of cascade hydropower station, joint dispatching of cascade hydropower station was proposed by means of improved and optimized reservoir operation chart, which was based on optimized deterministic dispatching model, combined with reservoir operation function. Taking the joint dispatching of cascade hydropower station in Zagunao River basin as an example, the reservoir operation chart of Shiziping hydropower station in Zagunao cascade hydropower station was made. Additionally, the reservoir operation strategies of Xuecheng and Gucheng hydropower station were developed, and the decision scheme of the joint dispatching of cascade hydropower station in Zagunao River Basin was formed. The results show that the improved and optimized reservoir operation chart can meet the requirements of lesser output, can coordinate the different scheduling region,

项目后评价对提高投资决策水平和保障项目综合效益意义重大。科学、客观地评价光伏电站项目成果,可使光伏电站项目管理更加规范化、程序化。随着光伏电站运营中可能出现问题的增多,对光伏电站项目后评价的需求也日益增长。本文选取具有代表性的射阳光伏电站项目,在构建光伏电站项目后评价指标体系基础上,运用层次分析法和模糊综合评价模型,从建设过程、运营效果、环境影响和可持续性等方面进行了后评价研究。最后,提出促进光伏电站建设与发展的对策建议。

Post project evaluation is an effective mean to improve investment decision -making and management level . With the rapid development of photovoltaic industry and the increase of the problems that may arise during photovoltaic power plants operation , the demand for post project evaluation is growing . How to evaluate photovoltaic power generations scientifically , is objectively essential . On the basis of building the post evaluation system , the paper uses fuzzy comprehensive evaluation model to conduct the post project evaluation of photovoltaic power generation . And the author takes CECEP Photovoltaic Substation for example . Finally , the paper puts forward some suggestions to the development of the photovoltaic industry .