| 引用本文: | 王立强,陶 军,阿敏夫,等.抑制新能源并网系统谐振的逆变器阻抗适配支路参数设计方法[J].电力系统保护与控制,2024,52(11):74-83.[点击复制] |
| WANG Liqiang,TAO Jun,A Minfu,et al.Parameter design method for the impedance adaptation branch of an inverter to suppressresonance in new energy grid-connected systems[J].Power System Protection and Control,2024,52(11):74-83[点击复制] |
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| 摘要: |
| 随着高比例新能源并网成为发展趋势，新能源并网系统谐振成为影响新型电力系统安全稳定的潜在因素。由于风光资源在时间尺度上存在互补特性，可以通过调整逆变器并网特性实现系统阻尼的分时互济。针对逆变器阻抗适配支路的参数设计问题，提出阻尼系数的优化设计方法。首先，推导了阻尼互济控制逆变器的输出阻抗表达式，结合阻抗的幅值和相位分析阻尼系数对输出阻抗的影响，提出阻尼系数的初选设计方法。随后，从系统稳定性角度分析电网阻抗与阻尼系数之间的关系，为阻尼系数的优化提供了依据。为解决固定阻尼给控制带来的限制问题，提出了一种阻尼系数自适应的阻尼互济控制，使得控制更加灵活有效。最后，通过仿真和实验验证了阻抗适配支路参数设计方法的准确性以及阻尼系数自适应算法的有效性。 |
| 关键词: 新能源并网系统 阻抗适配支路 阻尼互济控制 虚拟阻尼系数 自适应算法 |
| DOI：10.19783/j.cnki.pspc.231364 |
| 投稿时间：2023-10-22修订日期：2024-04-09 |
| 基金项目:四川省自然科学基金青年基金项目资助(2022NSFSC1904)；内蒙古电力公司2023年指令攻关计划项目资助(2023-4-4) |
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| Parameter design method for the impedance adaptation branch of an inverter to suppressresonance in new energy grid-connected systems |
| WANG Liqiang1,TAO Jun1,A Minfu1,FAN Hailong2,MA Junpeng3,YIN Qi3,WANG Shunliang3 |
| (1. Inner Mongolia Power Research Institute Branch, Inner Mongolia Power (Group) Co., Ltd., Hohhot 010020, China;
2. Inner Mongolia Power (Group) Co., Ltd., Hohhot 010020, China; 3. College of Electrical
Engineering, Sichuan University, Chengdu 610065, China) |
| Abstract: |
| With the development of a high proportion of new energy grid connection, the resonance of new energy grid connection systems has become a potential factor affecting the safety and stability of new power systems. Because of the complementary characteristics of wind and solar resources in the time scale, the time-sharing and mutual aid of system damping can be realized by adjusting the grid-connected characteristics of the inverter. Aiming at the parameter design problem of the inverter impedance adaptation branch, an optimal design method is proposed. First, the output impedance expression of the inverter with damping complementary control is derived, and the influence of the damping coefficient on the output impedance is analyzed by combining the amplitude and phase of impedance, and the primary design method of the damping coefficient is proposed. Subsequently, the relationship between the impedance of the power grid and the damping coefficient is analyzed from the perspective of system stability, providing a basis for optimizing the damping coefficient. To address the limitation of fixed damping on control, a damping coefficient adaptive damping complementary control is proposed, making the control more flexible and effective. Finally, the accuracy of the impedance adaptation branch parameter design method and the effectiveness of the damping coefficient adaptive algorithm are verified through simulation and experiments. |
| Key words: new energy grid connection system impedance adaptation branch damping mutual aid control virtual damping coefficient adaptive algorithm |
