利用DVR抑制电压暂降和相位跳变研究
投稿时间:2019-08-13  修订日期:2019-08-27  点此下载全文
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作者单位邮编
高强* 国网浙江省电力有限公司台州供电公司 318000
周洪青 国网浙江省电力有限公司台州供电公司 
高骞 S国网江苏省电力有限公司 
林芬 S国网福建省电力有限公司
S国网福建省电力有限公司 
中文摘要:本文介绍了一种利用动态电压恢复器(DVR)提高敏感负载电压质量的有效策略,在减轻负载侧电压的相位跳变同时提高整体暂降补偿时间。利用电能优化补偿策略完成瞬态过程的平滑过渡,确保电压补偿和恢复之间的有效联动。推导并比较两阶段的模态运行限制及激活新的注入参考电压的更新过程,防止系统超出其运行限制。给出了工作逻辑和总体控制方案,确保了该方法的良好可控性。最后结合实验仿真结果验证了该方法的有效性。
中文关键词:电压暂降  动态电压恢复器  相位跳变  恢复阶段  运行限制
 
Research on Suppressing Voltage Sag and Phase Jump by DVR
Abstract:This paper introduces an effective strategy to improve the voltage quality of sensitive load by using dynamic voltage restorer (DVR), which can reduce phase jump of load side voltage and improve the overall compensation time of sag. The power optimization compensation strategy is used to complete the smooth transition of the transient process and ensure the effective relationship between voltage compensation and recovery. The modal operation boundaries of the two stages are deduced and compared, and the renewal process of the new injection reference voltage is activated to prevent the system from exceeding its operating limit. The working logic and overall control scheme are given to ensure that the method keeps good controllability and provides flexible voltage support. Finally, the validity of the method is verified by the simulation results.
keywords:voltage sag  dynamic voltage restorer  phase jump  recovery phase  operation boundary
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