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中文摘要：
励磁控制系统的强励功能能够在电力系统发生扰动后的短时间内，提供大量的无功功率，迅速恢复电压水平，提高系统的稳定性。电压调节器参数设置直接影响励磁机的强励效果和系统的暂态稳定性。针对2010年南方电网交直流混合输电系统，研究了励磁控制系统电压调节器的最大输出和调压器增益对电力系统暂态稳定裕度的影响。仿真结果表明，当电压调节器的输出电压为最大值时，系统电压暂态稳定裕度没有达到最大；当系统的功角暂态稳定裕度达到最大时，系统电压安全裕度也没有达到最大。
英文摘要：
Forced excitation of excitation control system can supply a large amount of reactive power, restore voltage level quickly and enhance power system stability in a short time period after power system is disturbed. The parameter setting of voltage regulator directly impacts the forced excitation effect and transient stability of power system. For hybrid AC/DC power transmission system in South China power grid in the year 2010, the impact of maximum output of voltage regulator in excitation control system and regulator gain on power system transient stability margin is researched. Research results show that when the output of voltage regulator is the maximum value, the voltage transient stability margin of power system does not achieve its maximum; when angle transient stability margin reach maximum gain, it does not make voltage security margin achieving maximum also.
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