储能型SNOP电压支撑控制策略研究与仿真  

Research and Simulation of Voltage Support Strategy for SNOP with Energy Storage

作　　者：陆旭 郭家虎[1] 吴冬晖 纪泽宇 LU Xu;GUO Jia-hu;WU Dong-hui;JI Ze-yu(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《计算机仿真》2022年第6期108-112,237,共6页Computer Simulation

基　　金：电力传输与功率变换控制教育部重点实验室开放课题(2020AC01);安徽理工大学2019年创新基金(2019CX2046)。

摘　　要：柔性互联系统中由于发生故障可能会导致重要负荷失电,需要从非故障侧转移部分能量恢复负荷供电,进而影响非故障侧的电能质量,在柔性互联设备SNOP的直流侧接入储能可有效解决上述问题。首先分析了储能型SNOP的数学模型并讨论了储能的充放电工作原理,随后提出了储能型SNOP故障情况下的电压支撑控制策略。控制策略通过协调两侧变流器的功率输出,控制储能放电为故障侧提供相应的功率补偿来维持稳定的电压支撑,从而恢复负荷供电。最后,利用DigSILENT建立仿真模型,实现了储能的充放电控制,并通过切断负荷供电的方式验证控制策略的有效性。结果表明,上述控制策略能够在保持非故障侧正常运行的同时利用储能为失电负荷提供稳定的电压支撑。In the flexible interconnection system, due to the failure of a certain side, it is necessary to transfer part of the energy from the non fault side to restore the load power supply, which will affect the power quality of the non fault side. This problem can be effectively solved by connecting energy storage in the DC side of the flexible interconnection device SNOP. Firstly, the mathematical model of SNOP with energy storage was analyzed, and the control of charge and discharge of energy storage device was discussed. Then, the voltage support control strategy under the fault condition of SNOP with energy storage was proposed. The control strategy coordinated the power output of converters on both sides, controled the energy storage discharge, and provided corresponding power compensation for the fault side to maintain stable voltage support, so as to restore the load power supply. Finally, the simulation model was established on DigSILENT to realize the charge and discharge control of energy storage, and the effectiveness of the control strategy was verified by cutting off the load power supply. The results show that the control strategy can utilize the energy storage to provide stable voltage support for loss load while maintaining the normal power transmission on the non-fault side.

关 键 词：柔性互联 电压支撑 供电恢复 

分 类 号：TM743[电气工程—电力系统及自动化]