| 引用本文: | 曾江,冯健磊,陈书樑,熊陶君,陈伟国,刘淇伟.具有谐波治理功能的虚拟谐波电阻型储能逆变器控制策略[J].电力自动化设备,2022,42(11): |
| ZENG Jiang,FENG Jianlei,CHEN Shuliang,XIONG Taojun,CHEN Weiguo,LIU Qiwei.Control strategy of virtual harmonic resistance-type energy storage inverter with harmonic governance function[J].Electric Power Automation Equipment,2022,42(11): |
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| 摘要: |
| 传统的储能逆变器在进行谐波治理时只能补偿指定的非线性负载产生的谐波电流，无法降低电网中原有的谐波含量。为此，分析了并联电阻对并网点处谐波电压以及系统谐振的抑制作用，提出了虚拟谐波电阻型储能逆变器的控制策略。对于基波而言，储能逆变器仍能实现正常充放电功能；对于谐波而言，控制储能逆变器输出与谐波电压幅值成比例、相位相反的谐波电流，此时逆变器相当于一个虚拟谐波电阻，可以吸收谐波功率并抑制并网点处谐波电压。在考虑谐振的情况下采用扰动观察法自动调节虚拟谐波电导值，使得储能逆变器最大化吸收谐波功率。仿真和实验结果表明，虚拟谐波电阻型储能逆变器能在正常充放电的同时实现良好的谐波治理功能。 |
| 关键词: 储能逆变器 虚拟谐波电阻 谐波治理 谐振抑制 控制策略 |
| DOI：10.16081/j.epae.202205007 |
| 分类号:TM761;TM464 |
| 基金项目:广东省基础与应用基础研究基金资助项目 (2021A1515012616) |
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| Control strategy of virtual harmonic resistance-type energy storage inverter with harmonic governance function |
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ZENG Jiang, FENG Jianlei, CHEN Shuliang, XIONG Taojun, CHEN Weiguo, LIU Qiwei
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School of Electric Power, South China University of Technology, Guangzhou 510640, China
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| Abstract: |
| The traditional energy storage inverter can only compensate the harmonic current generated by the specified nonlinear load, but cannot reduce the original harmonic content of the power grid. Therefore, the suppression effect of parallel resistance on harmonic voltage at the PCC(Point of Common Coupling) and system resonance is analyzed, and the control strategy of virtual harmonic resistance-type energy storage inverter is proposed. For fundamental wave, the energy storage inverter can still achieve normal charging and discharging function. For harmonics, the energy storage inverter is controlled to output harmonic current, whose magnitude is proportional to the magnitude of harmonic voltage and whose phase is opposite to that of harmonic voltage. In this case, the inverter is equivalent to a virtual harmonic resistance, which can absorb harmonic power and suppress harmonic voltage at the PCC. Considering the resonance, the perturbation and observation method is used to adjust the virtual harmonic conductance automatically so that the energy storage inverter can absorb the maximum harmonic power. The simulative and experimental results show that the virtual harmonic resistance-type energy storage inverter can realize good harmonic governance function while charging and discharging normally. |
| Key words: energy storage inverter virtual harmonic resistance harmonic governance harmonic suppression control strategy |
