| 引用本文: | 杜金鹏,王 康,汪光森,等.基于零极点匹配技术的电力电子开关恒导纳模型[J].电力系统保护与控制,2025,53(05):93-103.[点击复制] |
| DU Jinpeng,WANG Kang,WANG Guangsen,et al.A power electronic switch constant admittance model based on pole-zero matching technique[J].Power System Protection and Control,2025,53(05):93-103[点击复制] |
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| 摘要: |
| L/C恒导纳开关模型具备导纳矩阵恒定、实时仿真效率高的优势，是电磁暂态仿真中主要的开关模型之一，但虚拟功率损耗问题严重影响仿真精度。为消除虚拟功率损耗，提出一种基于零极点匹配技术的L/C恒导纳开关模型。首先，根据Z变换下极点分布规律比较结构稳定性，选择最优开关结构。其次，以零极点匹配技术离散开关模型，同时根据稳态特性与暂态特性确定模型参数。最后，通过分析虚拟损耗产生机理，提出一种恒定初始化技术，计算不同开关状态下的历史电流源。以两电平电压源型换流器为实验对象，搭建实时仿真硬件平台验证所提模型的可行性。仿真结果表明，与传统L/C恒导纳模型相比，所提开关模型的虚拟功率损耗减小92%，模型振荡时间减少20%~30%，恒定初始化技术可彻底消除虚拟功率损耗。 |
| 关键词: 电力电子开关 恒导纳模型 虚拟功率损耗 零极点匹配技术 恒定初始化 |
| DOI：10.19783/j.cnki.pspc.240794 |
| 投稿时间：2024-06-24修订日期：2024-09-11 |
| 基金项目:国家自然科学基金面上项目资助(51477179) |
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| A power electronic switch constant admittance model based on pole-zero matching technique |
| DU Jinpeng,WANG Kang,WANG Guangsen,LIU Zhu |
| (National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China) |
| Abstract: |
| An L/C constant admittance switch model has the advantages of a constant admittance matrix and high real-time simulation efficiency. This is one of the main switch models in electromagnetic transient simulation. However, virtual power loss significantly affects the simulation accuracy. To eliminate the virtual power loss, a L/C constant admittance switch model based on pole-zero matching technique is proposed. First, the switch structure is selected according to the Z-transform pole distribution law on the basis of stability. Then, the switch model is discretized with a pole-zero matching technique, while the model parameters are determined based on the steady-state and transient characteristics. Finally, by analyzing the mechanism of virtual power loss, a constant initialization technique is proposed to calculate the historical current sources in different switching states. Taking a two-level voltage source converter as the experimental object, a real-time simulation hardware platform is built to verify the feasibility of the proposed model. Simulation results show that, compared with the traditional L/C constant admittance switch model, the virtual power loss of the proposed switch model is reduced by 92%, the oscillation time of the model is reduced by 20%~30%, and the constant initialization technique can completely eliminate the virtual power loss. |
| Key words: power electronic switch constant admittance model virtual power loss pole-zero matching technique constant initialization |
