静止变频启动器（SFC）在大型抽水蓄能电站中的应用研究

发布时间：2018-08-19 18:21

【摘要】：大型抽水蓄能电站运行灵活、反应迅速、是电力系统中具有调峰、填谷、调频、调相、备用和黑启动等多种功能的特殊电源，是目前最具有经济性的大规模储能设施。其中，大型抽水蓄能电站的静止变频器（SFC，Static Frequency Converter）是其特有的一种重要电气设备之一，它的功能是在可逆机组转子建立磁场以后，逐渐通过调整可逆机组定子绕组的电流频率，让产生的电磁力矩使发电机逐渐提升转速，直到可逆机组并上电网运行。作为同步驱动的一种新兴方式，静止变频启动具有诸多优点：效率高，控制性能好；启动平稳，不存在失步问题；可多台机组共用一套SFC，单机投资价格比低；对电机和电网冲击小、起动迅速可靠等。变频启动是大型抽水蓄能电站P工况启动的首选方式，推广变频启动不仅是当前推进蓄能电站可靠经济运行，提高启动成功率的重要手段，也是实现电网安全稳定运行的必然要求。本文主要研究静止变频器在大型抽水蓄能电站应用的关键技术以及在应用过程中存在的问题。通过研究静止变频启动器的基本工作原理，探讨SFC各部件的技术要求及应用功能，对SFC在抽水蓄能电厂应用的关键技术进行研究，包括SFC启动原理、转子位置的检测（静止变频起动过程的难点）、SFC启动控制程序和SFC的保护措施等，并分析广州蓄能水电厂转子位子测量的实现，广州蓄能水电厂SFC在启动全过程的控制，广州抽水蓄能水电的主要电气保护，总结SFC在抽水蓄能电厂应用中的运行与维护经验。通过收集研究SFC在大型抽水蓄能电站的应用中常出现故障问题，对出现各类问题进行分析总结其原因，研究常出现问题的一般处理原则，并以广州蓄能水电厂为例介绍了SFC应用中常见问题和解决措施，，着重研究了SFC在蓄能电站应用与谐波产生的问题，探索如何改善SFC谐波工作状态。
[Abstract]:Large pumped storage power station is a special power supply with many functions, such as peak shaving, valley filling, frequency modulation, phase modulation, standby and black start, which is the most economical energy storage facility at present. Among them, the static Frequency Converter) of a large pumped storage power station is one of its special important electrical equipments. Its function is to adjust the current frequency of the stator winding of the reversible unit gradually after the magnetic field of the rotor of the reversible unit has been established. The resulting electromagnetic torque causes the generator to gradually increase its speed until the reversible unit is put on the grid. As a new way of synchronous drive, static frequency conversion startup has many advantages: high efficiency, good control performance, steady start, no out-of-step problem, multiple units can share a set of SFCs, and the investment price ratio of single machine is low. Small impact on motor and power grid, quick and reliable start, etc. Frequency conversion startup is the first choice for the start-up of large pumped storage power station under P working condition. Popularizing frequency conversion startup is not only an important means to promote reliable and economic operation of the storage power station at present, but also to improve the success rate of startup. It is also the inevitable requirement to realize the safe and stable operation of power grid. In this paper, the key technology and problems in the application of static inverter in large pumped storage power station are studied. By studying the basic working principle of static variable frequency starter and discussing the technical requirements and application functions of SFC components, the key technology of SFC application in pumped storage power plant is studied, including the principle of SFC startup. The detection of rotor position (the difficulty of static frequency conversion starting process), the starting control program and the protection measures of SFC, etc. The realization of rotor position measurement in Guangzhou storage hydropower plant and the control of SFC in the whole start-up process of Guangzhou storage hydropower plant are analyzed. The main electrical protection of pumped storage hydropower in Guangzhou is summarized. The operation and maintenance experience of SFC in the application of pumped storage power plant is summarized. Through collecting and studying the common fault problem in the application of SFC in the large pumped storage power station, the causes of all kinds of problems are analyzed and summarized, and the general treatment principles of the common problems are studied. Taking Guangzhou storage hydropower plant as an example, this paper introduces the common problems and solving measures in the application of SFC, emphatically studies the application and harmonic generation of SFC in the storage power plant, and probes into how to improve the working state of SFC harmonics.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV743;TV734

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