基于储能虚拟同步机多布点的HVDC换相失败抑制方法
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TM93

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国家电网有限公司总部科技项目(5419-201918206A-0-0-00)


HVDC commutation failure suppression method based on energy storage virtual synchronous machine with multiple points
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    摘要:

    随着高压直流输电系统规模的不断扩大,发生在换流站内的换相失败对直流输电工程的安全稳定运行的影响越来越大。本文提出了储能虚拟同步机的概念并完成了该模型的搭建,验证了储能虚拟同步机对HVDC系统的换相电压跌落具有较强的的支撑作用。充分利用储能虚拟同步机的无功补偿特性,提出了一种利用储能虚拟同步机应对多馈入直流换相失败的多布点方法。该方法首先从各节点与换流站间的电气距离入手,以此确定待补偿区域;然后对带补偿区域内的节点进行非故障点电压反应速率平均值计算,以此为指标确定最佳的储能虚拟同步机安装站点;最后在PSCAD中进行仿真,得到单一储能虚拟同步机接入对换相失败的抑制效果,通过与实际电网运行数据进行对比,验证了本布点方法确能有效发挥储能虚拟同步机的聚合作用、更好地抑制换相失败。

    Abstract:

    With the continuous expansion of the scale of the HVDC transmission system, the commutation failure in the converter station has an increasing impact on the safe and stable operation of the DC transmission project. This paper proposes the concept of an energy storage virtual synchronous machine, completes the construction of the model, and verifies that it has strong support for the commutation voltage drop of the HVDC system. Then,makingfull use of the reactive power compensation characteristics of the energy storage virtual synchronous machine.andthemulti-point deployment method using energy storage virtual synchronous machine is proposed to cope with multi-infeed DC commutation failure. The method firstly starts with the electrical distance between each node and the converter station to determine the area to be compensated.Then, calculates the average value of the non-fault point voltage response rate of the nodes in the compensation area is calculated.An indicator is used to determine the best The energy storage virtual synchronous machine installation site; finally, the simulation is performed in PSCAD to obtain the suppression effect of the single energy storage virtual synchronous machine access on the commutation failure.By comparing the actual grid operating data, it is verified that the proposedmethod couldeffectively exert the storage It can virtualize the aggregation effect of synchronous machines, and better suppress the failure of commutation.

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李强,吴盛军,易洋,等.基于储能虚拟同步机多布点的HVDC换相失败抑制方法[J].电力科学与技术学报,2022,37(3):77-84.
LI Qiang, WU Shengjun, YI Yang, et al. HVDC commutation failure suppression method based on energy storage virtual synchronous machine with multiple points[J]. Journal of Electric Power Science and Technology,2022,37(3):77-84.

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  • 在线发布日期: 2022-07-24
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