联合运行水电站水力机械系统小波动稳定性研究

发布时间：2018-03-31 07:18

本文选题：水电站　切入点：水力机械系统　出处：《水利学报》2017年02期

【摘要】：推导了水电站联合运行条件下的系统等效惯性时间常数、总出力变化以及机组控制方程,结合水电站实际工程的水道布置及机械特性,分别建立了系统的小波动稳定理论分析模型和小波动过渡过程时域仿真模型。通过理论分析,给出联合运行条件下系统的稳定性特征,采用数值仿真,模拟了负荷扰动时系统参数的小波动过渡过程,并与孤网条件下单个水电站的稳定性及调节品质进行了比较。结论表明:相对于孤网运行,水电站联合运行可增加系统的稳定性,改善系统的调节品质,联合运行改变了机组的调节方式,系统总出力与负荷平衡,机组无需保持自身出力为常数;联合运行时,调速器参数可在系统稳定域内选取相对较小值,在保证系统稳定的前提下,可加快调节过程,改善调节品质。
[Abstract]:The system equivalent inertia time constant, total force variation and unit control equation under the condition of combined operation of hydropower station are derived, combined with the arrangement of waterway and mechanical characteristics of hydropower station. The theoretical analysis model of small wave stability and the time domain simulation model of small wave transition process are established respectively. Through theoretical analysis, the stability characteristics of the system under the condition of joint operation are given, and the numerical simulation is used. The small fluctuation transition process of system parameters under load disturbance is simulated and compared with the stability and regulation quality of a single hydropower station under isolated grid conditions. The combined operation of the hydropower station can increase the stability of the system and improve the regulating quality of the system. The combined operation changes the regulation mode of the unit, the total output of the system is balanced with the load, and the unit does not need to maintain its own output force as a constant. The governor parameters can select a relatively small value in the stability region of the system. On the premise of ensuring the stability of the system, the governor parameters can speed up the adjustment process and improve the regulating quality.
【作者单位】：河海大学水利水电学院;
【基金】：国家自然科学基金项目(51409087,51379064) 江苏省自然科学基金项目(BK20130839) 中央高校基本科研业务费(2016B04914)
【分类号】：TV734

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