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On the Rotor Angle and Voltage Dynamics Decoupling in Synchronous Generators with Nonlinear AVR

机译：非线性AVR同步发电机转子角度和电压动力学

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摘要

In this paper, rotor angle and voltage dynamics decoupling in a synchronous generator connected to an infinite bus using a partial feedback linearization-based nonlinear voltage regulator (FBLAVR) is described. It is well known that the fast voltage regulation using static excitation system introduces negative damping in the system. If this coupling can be eliminated then one can simultaneously achieve fast voltage regulation and desired damping performance. This paper identifies such a decoupling behavior using an FBLAVR and shows that the damping with the FBLAVR only depends on the inherent damping of the machine. The necessity of a power system stabilizer (PSS) is identified even with the FBLAVR, if the natural damping is not sufficient. Thus motivated, an FBLAVR + PSS control scheme is proposed and compared with a linear automatic voltage regulator (AVR) + PSS control scheme. It is shown that the generator-exciter-power system [GEP(s)] characteristics with FBLAVR does not change with the system operating conditions. The superiority of the proposed control scheme is validated over a wide range of operating conditions on a single machine infinite bus (SMIB) power system.
机译：在本文中，描述了使用基于部分反馈线性化的非线性电压调节器（FBLAVR）连接到无限总线的同步发电机中的转子角度和电压动力学。众所周知，使用静电激励系统的快速电压调节引入了系统中的负阻尼。如果可以消除该耦合，则可以同时实现快速电压调节和期望的阻尼性能。本文使用FBLAVR识别出这样的解耦行为，并表明使用FBLAVR的阻尼仅取决于机器的固有阻尼。如果天然阻尼是不够的，即使使用FBLAVR，也识别了电力系统稳定剂（PSS）的必要性。因此，提出了FBLAVR + PSS控制方案并与线性自动电压调节器（AVR）+ PSS控制方案进行了比较。结果表明，具有FBLAVR的发电机 - 激励器电源系统[GEP（S）]不随系统操作条件而改变。所提出的控制方案的优越性在单机无限总线（SMIB）电力系统上的各种操作条件下验证了验证。

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