电力电子接口电源的准功率特性降阶建模体系
发布时间：2019-01-08 16:51
【摘要】：系统级仿真中如何对电力电子接口电源降阶建模并分析其暂态稳定性成为新能源并网研究中亟待解决的难题。该文以蓄电池储能系统BESS为研究对象,根据电力电子接口特有的机电解耦原理解释这一类电源的准功率特性,并基于奇异摄动理论分析电源内部的精细时间尺度结构。据此,该文建立适应不同复杂度、精度要求的微分代数方程DAE降阶模型体系。在不同网侧外部扰动及电源内部参数配置的条件下验证降阶模型体系的有效性。模型可揭示具有准功率特性电源的暂态失稳模式,并保持电源外特性的模拟精度,计算出的暂态失稳临界指标满足实际需求。
[Abstract]:How to model power electronic interface power supply and analyze its transient stability in system-level simulation has become a difficult problem to be solved in the research of new energy grid connection. In this paper, the quasi-power characteristic of the battery energy storage system (BESS) is explained according to the electromechanical decoupling principle of the power electronic interface, and the fine time scale structure of the power supply is analyzed based on the singular perturbation theory. Based on this, a DAE reduced order model system for differential algebraic equations with different complexity and accuracy is established. The effectiveness of the reduced order model is verified under the conditions of different external disturbances on the grid side and the configuration of the internal parameters of the power supply. The model can reveal the transient instability mode of the power supply with quasi-power characteristics and maintain the simulation accuracy of the external characteristics of the power supply. The calculated critical index of transient instability can meet the actual needs.
【作者单位】： 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);中国电力科学研究院;ABB(中国)有限公司;
【基金】：国家电网公司科技项目(XTB17201500037)~~
【分类号】：TM743;TM912
本文编号：2404869
[Abstract]:How to model power electronic interface power supply and analyze its transient stability in system-level simulation has become a difficult problem to be solved in the research of new energy grid connection. In this paper, the quasi-power characteristic of the battery energy storage system (BESS) is explained according to the electromechanical decoupling principle of the power electronic interface, and the fine time scale structure of the power supply is analyzed based on the singular perturbation theory. Based on this, a DAE reduced order model system for differential algebraic equations with different complexity and accuracy is established. The effectiveness of the reduced order model is verified under the conditions of different external disturbances on the grid side and the configuration of the internal parameters of the power supply. The model can reveal the transient instability mode of the power supply with quasi-power characteristics and maintain the simulation accuracy of the external characteristics of the power supply. The calculated critical index of transient instability can meet the actual needs.
【作者单位】： 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);中国电力科学研究院;ABB(中国)有限公司;
【基金】：国家电网公司科技项目(XTB17201500037)~~
【分类号】：TM743;TM912
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