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首页> 外文期刊>Electric power systems research >Optimized virtual inertia of wind turbine for rotor angle stability in interconnected power systems
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Optimized virtual inertia of wind turbine for rotor angle stability in interconnected power systems

机译：优化风力涡轮机的虚拟惯量，以实现互连电力系统中的转子角稳定性

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摘要

In the power system with virtual inertias, the current dynamic analysis of frequency stability is insufficient to ensure grid security because the virtual inertia control also has a significant effect on the first swing stability of the rotor angle. This paper investigates a novel virtual inertia control strategy for wind turbines to improve the first swing stability of the rotor angle in the interconnected power grid. The virtual energy provided by the virtual inertia control of the wind turbines is calculated. Considering that the rotor angle swings in the forward and backward directions, the effect of virtual energies in two different coherent generator groups on system transient energy conversion is evaluated. Moreover, a novel control method is proposed to provide more reliable inertia support. A typical two-area interconnected power system with a high wind penetration of 35%, which consists of four conventional power plants and two doubly fed induction generator (DFIG)-based wind farms, is simulated. The simulation results demonstrate that in the transient events, the rotor angle difference between the coherent generator groups can be reduced by regulating the variable inertias, significantly improving the reliability of the virtual inertia support of wind turbines.
机译：在具有虚拟惯性的电力系统中，当前的频率稳定性动态分析不足以确保电网安全，因为虚拟惯性控制还对转子角的第一摆动稳定性产生重大影响。本文研究了一种用于风力涡轮机的新型虚拟惯性控制策略，以提高互连电网中转子角的第一摆动稳定性。计算由风力涡轮机的虚拟惯性控制提供的虚拟能量。考虑到转子角向前和向后摆动，评估了两个不同相干发电机组中虚拟能量对系统瞬态能量转换的影响。此外，提出了一种新颖的控制方法以提供更可靠的惯性支持。模拟了一个典型的具有35％的高风速的两区域互连电力系统，该系统由四个常规电厂和两个基于双馈感应发电机（DFIG）的风电场组成。仿真结果表明，在瞬态事件中，通过调节可变惯性可以减小相干发电机组之间的转子角差，从而显着提高了风力发电机虚拟惯性支撑的可靠性。

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