抽蓄机组调相运行对宾金直流无功电压支撑的仿真研究

特高压直流馈入电网的无功电压支撑能力对降低直流换相失败及闭锁概率、提升直流运行的稳定可靠性有重要作用。在论证抽水蓄能机组调相运行模式的关键技术和可行性的基础上，提出采用临近抽蓄机组调相运行为特高压直流提供无功电压支撑的运行方式。以浙江电网宾金直流和邻近的抽蓄机组为例，仿真分析了抽蓄机组采用调相运行方式后在交流系统短路等典型故障下对宾金直流的支撑作用，验证了特定工况下可以采用抽蓄机组调相运行来提升直流运行的可靠性进而提升多馈入直流的浙江电网安全、可靠运行水平。

Simulation Analysis of Voltage Support to Binjin HVDC Provided by Pumped Storage Unit's Synchronous Condenser Operation

Voltage support provided by infeed ultra HVDC transmission system is of great significance for reducing the probability of HVDC's blocking or commutation failure and improving operation stability and reliability. This paper demonstrates key technologies and feasibility of pumped storage unit's (PSU's) synchronous condenser operation (SCO) mode. Moreover, a new operation mode which utilizes nearby PSU's SCO to provide voltage support to infeed ultra HVDC transmission system is proposed. The Binjin HVDC in Zhejiang grid and nearby abuilding PSU are considered in simulation analysis, which analyze impact of voltage support provided by PSU in SCO mode on Binjin HVDC system under some typical fault including AC system short circuit. Simulating result verifies that under specific conditions, the PSU's SCO can be utilized to improve HVDC operation reliability, which further improves security and reliability of HVDC multi-infeed Zhejiang power grid.