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中文摘要：
相似律是开展模型试验的首要条件。本文从水电站的水机电系统数学模型出发，利用方程式法推导建立了完整的过渡过程模型试验相似律，推导的过程中对调速器、采用三阶发电机模型并考虑励磁系统、负载与网络的电气系统进行了重点研究。然后结合水机电相似律提出了满足模型发电机同步转速要求的变频控制方法和满足电气设备标准电压要求的变压控制方法，并从理论上揭示了模型调速器与原型调速器具有相同的内回路稳定条件。
英文摘要：
Similarity law is the first condition of the model test. In this paper, the study was started from the mathematical model of hydraulic, mechanical and power system in hydropower station, and the complete similarity law of model test for the united transient process was established by the method of equation. In the process of derivation, the key researches were carried on governor and electrical system that considered the third-order model of generator, excitation system and load and network. Then combining with similarity law, the frequency conversion control method and voltage conversion control method were put forward to meet the requirements of synchronous speed and standard voltage. In the last, this paper revealed that the model governor and the prototype governor have the same inner loop stable condition.
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