摘要
半波长输电技术是一项具有前瞻性和竞争力的新型输电技术。特高压半波长输电线路稳态工频过电压问题严重,须制定相关的故障后安全稳定控制措施。该文提出了通过切除送端配套机组、线路末端投并联无功补偿设备、快速直流调制等控制措施抑制半波长输电线路稳态工频过电压,同时给出了相关理论分析,并通过大电网仿真算例验证了控制措施的有效性。该文研究成果进一步丰富和完善了对特高压半波长输电线路接入系统后控制特性的认识,将为大电网新型输电技术提供理论储备和技术保障。
Half wavelength AC transmission technology is a forward-looking and competitive newtransmission technology. The steady-state overvoltage of ultra-high-voltage (UHV) half wavelength transmission lines is serious. It is necessary to focus on the stability control measures after fault. In this paper,the control measures is put forward,such as reducing power generation at the sending terminal,applying shunt reactive power compensation at the end of the line,and fast modulating direct current power. The relevant theoretical analysis is given,and the effectiveness of the control measures is verified by the large power grid simulation. The characteristic of UHV half wavelength transmission system is enriched and the theoretical and technical support is provided for the future newtransmission technology by the paper research.
引文
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