| 引用本文: | 王 倩,盛四清,田颢璟.逆变电源对风火/光火打捆送端电网低频振荡影响及其
惯量匹配方法[J].电力系统保护与控制,2022,50(11):112-120.[点击复制] |
| WANG Qian,SHENG Siqing,TIAN Haojing.Effect of an inverter on low frequency oscillation of wind-thermal/solar-thermal bundledsending-end power grid and inertia matching method[J].Power System Protection and Control,2022,50(11):112-120[点击复制] |
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| 摘要: |
| 为研究逆变电源(Inv)对“风火/光火”打捆送端电网稳定运行的影响，提出了一种计及系统参数的控制模型及不同类型电源的惯量匹配方法。首先，构建Inv所有控制环节的数学模型，进而形成整个研究系统的小信号模型，并通过Matlab仿真验证。其次，基于小信号模型利用根轨迹法，分析系统参数对送端电网内部低频振荡的影响。研究表明送端电网内部线路越短，阻感比越大，Inv出力越多，越有利于系统稳定。最后，利用等效电源原理，推导出送端电网中两种类型电源的惯量匹配方法。RT-LAB半实物仿真验证了所提惯量匹配公式能更好分配功率，提高送端电网稳定性。 |
| 关键词: 逆变电源 送端电网 小信号模型 低频振荡 惯量匹配 |
| DOI：DOI: 10.19783/j.cnki.pspc.210934 |
| 投稿时间：2021-07-20修订日期：2021-12-14 |
| 基金项目:国家电网公司科技项目资助“高比例电力电子型电源接入对电力系统稳定性影响机理及控制措施研究”(5100-201955014A-0-0-00) |
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| Effect of an inverter on low frequency oscillation of wind-thermal/solar-thermal bundledsending-end power grid and inertia matching method |
| WANG Qian,SHENG Siqing,TIAN Haojing |
| (School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China) |
| Abstract: |
| In order to study the influence of the inverter (Inv) on the stable operation of the "wind-thermal/solar-thermal" bundled sending-end power grid, a control model that takes into account the system parameters and the inertia matching method of different types of power sources are proposed. First, this paper constructs the mathematical model of all the control links of Inv, and then forms the small signal model of the entire research system, which is verified by Matlab simulation. Secondly, based on the small-signal model, the root locus method is used to analyze the influence of system parameters on the internal low-frequency oscillation of the sending-end power grid. The study shows that the shorter the internal line of the sending-end power grid, the larger the resistance-inductance ratio and the more the Inv output, which is more conducive to system stability. Finally, using the principle of equivalent power supply, the inertia matching method of the two types of power sources in the sending-end power grid is derived. The RT-LAB semi-physical simulation verifies that the proposed inertia matching formula can better distribute power and improve the stability of the sending-end power grid.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 5100-201955014A-0-0-00). |
| Key words: inverter sending-end power grid small signal model low-frequency oscillation inertia matching |
