| 引用本文: | 肖湘宁,陈萌.不平衡电压下虚拟同步发电机功率控制策略[J].电力自动化设备,2017,37(8): |
| XIAO Xiangning,CHEN Meng.Power control of virtual synchronous generator under unbalanced grid voltage[J].Electric Power Automation Equipment,2017,37(8): |
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| 摘要: |
| 通过对电网电压不平衡下虚拟同步发电机输出功率的分析，提出了基于静止坐标系的功率控制策略，在不需要锁相环的情况下，利用负序电压控制分别对有功、无功功率振荡或三相电流不平衡进行抑制，既保证了虚拟同步发电机电压控制的电压源性质和惯性特性，又能够使分布式电源根据不同需求输出恒定的有功、无功功率或三相平衡电流。利用PSCAD / EMTDC软件仿真及基于RTDS的实时数字物理闭环实验，验证了所提控制策略的有效性，并对各控制策略的特性进行了量化分析。 |
| 关键词: 分布式电源 虚拟同步发电机 不平衡电网电压 功率振荡 正序和负序分量 功率控制 |
| DOI：10.16081/j.issn.1006-6047.2017.08.026 |
| 分类号:TM761 |
| 基金项目:国家高技术研究发展计划(863计划)资助项目(2015AA-050603)；中央高校基本科研业务费专项基金资助项目(2016XS01) |
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| Power control of virtual synchronous generator under unbalanced grid voltage |
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XIAO Xiangning, CHEN Meng
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| The output power of virtual synchronous generator under unbalanced grid voltage is analyzed and a power control strategy based on the stationary frame is proposed, which, without the phase locked loop, applies the negative-sequence voltage control to suppress the active-power oscillation, reactive-power oscillation and unbalanced three-phase currents respectively for ensuring the voltage-source nature and inertia property of the virtual synchronous generators and for enabling the distributed generation to output constant active-power, constant reactive-power or balanced three-phase currents as required. The effectiveness of the proposed control strategy is verified by PSCAD/EMTDC simulations and RTDS-based real-time digital-physical closed-loop experiments, and the features of its different control modes are quantitatively analyzed. |
| Key words: distributed power generation virtual synchronous generator unbalanced grid voltage power oscillation positive and negative sequence components power control |
