基于解耦安全域的多馈入交直流系统无功补偿装置落点研究

对于弱受端系统的多馈入交直流混联系统,直流子系统输电能力弱,功率调整范围小,快速功率调制时容易使换流母线的电压越限。在提升系统输电能力的措施中,安装无功补偿装置是一种十分有效的手段。为了确定无功补偿装置的最优落点位置,以STATCOM作为无功补偿装置,提出了基于解耦安全域的综合评价因子。该评价因子同时计及了在不同运行状态下,系统的输电能力以及解耦安全域内解的数量留存率等因素及其影响权重。算例分析表明,根据该综合评价因子的大小来确定多馈入交直流混联系统最佳的无功补偿装置落点方案,能够全面评价最优的无功补偿落点方案的优劣。

Research on the Location of Reactive Power Compensation Devices for Multi-Infeed AC/DC Systems Based on Decoupling Security Region

For a multi-infeed AC/DC hybrid system with a weak receiving end system,as the DC subsystem power transmission capacity is weak and the power adjustment range is small,so it is very easy to exceed the voltage limit of the converter bus when fast power modulation is performed.Among the measures to improve the transmission capacity of the system,installing reactive power compensation devices is a very effective means.In order to determine the optimal location of the reactive power compensation equipment,STATCOM is used in this paper as the reactive power compensation equipment,and a comprehensive evaluation factor based on the decoupling security region is proposed.The evaluation factor also takes into account the system's power transmission capacity,the quantity retention rate of solutions in the decoupling security region,and their impact weights under different network typologies.Finally,an example is given to show that the optimal location scheme of the device can be determined according to the comprehensive evaluation factor,which can evaluate the merits of the optimal location scheme.