| 引用本文: | 许国瑞,王珍珍,李伟力.双轴励磁发电机功率跟踪励磁控制系统研究[J].电力自动化设备,2022,42(6): |
| XU Guorui,WANG Zhenzhen,LI Weili.Research on power tracking excitation control system of dual-excited synchronous generator[J].Electric Power Automation Equipment,2022,42(6): |
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| 摘要: |
| 采用传统双通道励磁控制系统的双轴励磁发电机(简称为双励机)动态过程时间长，振荡幅值大，不利于电力系统的稳定运行。为此，在双励机的功率反馈环节增加不完全微分控制，提出了一种具有功率跟踪功能的励磁控制系统。对双励机动态过程中的有功功率、无功功率和励磁电流差值进行不完全微分，进而判断功率的变化趋势，调节d、q轴励磁电流的比例以改变励磁磁动势的方向，进而抑制功率的振荡，最终达到增加系统阻尼的作用。以转矩扰动和无功扰动为例，对比研究了功率跟踪励磁控制系统与双通道励磁控制系统对双励机动态过程振荡幅值和振荡时间的影响，结果表明，采用功率跟踪励磁控制系统可大幅减小系统的振荡幅值和振荡时间，有效提高系统的阻尼，为电力系统的稳定运行提供有力支撑。 |
| 关键词: 双轴励磁发电机 双通道控制 功率跟踪控制 不完全微分控制 励磁控制 |
| DOI：10.16081/j.epae.202203013 |
| 分类号:TM301.2 |
| 基金项目:国家自然科学基金资助项目(51977077) |
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| Research on power tracking excitation control system of dual-excited synchronous generator |
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XU Guorui1, WANG Zhenzhen1, LI Weili2
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1.School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;2.School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
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| Abstract: |
| The DESG(Dual-Excited Synchronous Generator) adopting the traditional dual-channel excitation control system has long dynamic process time and large oscillation amplitude, which is not conducive to the stable operation of the power system. So the incomplete differential control is added to the power feedback loop of DESG, and an excitation control system with power tracking function is proposed. The incomplete differentiation is performed for the active power, reactive power and excitation current difference in the dynamic process of DESG, so as to judge the power change trend, and then adjust the ratio of d-and q-axis excitation current to change the direction of the excitation motive force, suppress the power oscillation and finally achieve the effect of increasing system damping. Taking the torque disturbance and reactive power disturbance as examples, the influences of the power tracking excitation control system and the dual-channel excitation control system on the oscillation amplitude and oscillation time in the dynamic process of DESG are compared. The results show that, the power tracking excitation control system can greatly reduce the oscillation amplitude and oscillation time of the system, effectively improve the system damping and provide strong support for the stable operation of the power system. |
| Key words: dual-excited synchronous generator dual-channel control power tracking control incomplete differential control excitation control |
