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文章摘要
考虑系统阻尼和频率特性的机组参数优化策略
Parameter optimization strategy for units considering system damping and frequency characteristics
Received:February 25, 2019  Revised:February 25, 2019
DOI:10.19753/j.issn1001-1390.2020.12.004
中文关键词: 高渗透率  动态稳定性  调频能力  层次分析模型  惯性时间常数
英文关键词: high  penetration, dynamic  stability characteristic, frequency  modulation characteristic, analytic  hierarchy model, inertia  time constant
基金项目:
Author NameAffiliationE-mail
Sheng Siqing School of Electrical and Electronic Engineering,North China Electric Power University sqsheng@ncepu.edu.cn 
Li Pengwang* School of Electrical and Electronic Engineering,North China Electric Power University LPW5806@163.com 
Fan Maosen School of Electrical and Electronic Engineering,North China Electric Power University 744757525@qq.com 
Zhang Liwei School of Electrical and Electronic Engineering,North China Electric Power University 15803318552@163.com 
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中文摘要:
      波动性、随机性风电的大规模接入降低了系统的阻尼水平和频率响应性能,制约了风电渗透率的进一步提升。高风电渗透率场景下,火电机组的惯性时间常数对系统动态稳定特性和调频特性有相矛盾的作用。为了实现系统的综合特性最佳,文中提出了一种通过需求层次分析模型确定协调优化目标函数中各指标的权重系数,进而对机组参数进行优化选择的策略。该策略能够实现对系统不同性能进行侧重性优化,可以在不降低系统动态稳定水平的前提下提高系统的调频能力。仿真结果表明该策略能不同程度的提高系统的阻尼和调频能力,并且在不同渗透率水平下优化效果稳固可靠,增强了电网的外送能力和消纳风电的能力。
英文摘要:
      Large-scale access of volatile and stochastic wind power reduces the damping level and frequency response performance of the system, which also restricts the further improvement of wind power penetration. The impact of the inertia time constant of the thermal unit on the dynamic stability characteristics and frequency modulation characteristics is contradictory under the high wind power permeability. A strategy for determining the weighting coefficients of each index in the coordinated optimization objective function through the demand hierarchy analysis model and then the unit parameters are optimized and selected is proposed in order to achieve the best comprehensive characteristics of the system. This strategy can achieve the focus optimization of different performances, and can improve the frequency modulation capability of without reducing the dynamic stability level of the system. The simulation results show that the strategy can improve the damping and frequency modulation ability to different degrees, and the optimization effect is stable and reliable under different permeability levels, which enhanced the ability of the grid to deliver and dissipate wind power.
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