Precise control of power flow in multiterminal VSC-HVDCs using DC voltage droop control
Precise control of power flow in multiterminal VSC-HVDCs using DC voltage droop control
复制标题
使用直流电压下垂控制精确控制多端 VSC-HVDC 中的功率流
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
K. Uhlen
中科院分区：
文献类型：
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作者：
T. M. Haileselassie;K. Uhlen
直流线路电压降以及转换器功率损耗对使用直流电压降的多端 VSC-HVDC 中功率流的精确控制具有重大影响。当直流电压下垂控制用于多端VSC-HVDC时，由于直流母线电压不等，直流线路压降会导致直流网络中出现大量的潮流偏差。直流线路功率损耗和变流器功率损耗也会引起直流电网潮流偏差。为了实现直流网络中功率流的精确控制，必须消除由于这些因素而产生的功率偏差。通过在 PSCAD/EMTDC 中对五端 VSC-HVDC 系统进行仿真，演示了如何通过考虑这三个因素中的每一个来实现多端 VSC-HVDC 中功率流的精确控制。
DC line voltage drops as well as converter power losses have significant impacts on precise control of power flow in multiterminal VSC-HVDCs using DC voltage droop. When DC voltage droop controls are used in multiterminal VSC-HVDC, due to unequal DC bus voltages the DC line voltage drops causes large amount of power flow deviations in the DC network. DC line power losses and converter power losses also cause DC grid power flow deviations. To achieve precise control of power flow in the DC network, it is necessary that the power deviations occurring due to each of these factors be eliminated. With simulation of a five terminal VSC-HVDC system in PSCAD/EMTDC it is demonstrated how to achieve precise control of power flow in multiterminal VSC-HVDC by accounting for each of these three factors.