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发明公开
CN108808698A 基于储能的分布式次同步振荡抑制装置及新能源输电系统 审中-实审

基于储能的分布式次同步振荡抑制装置及新能源输电系统
摘要：
本发明公开了一种基于储能的分布式次同步振荡抑制装置及新能源输电系统，其中，次同步振荡抑制装置安装在新能源电场与汇流母线之间的输电线路上，包括：信号采集设备，与输电线路连接，用于采集输电线路上次同步振荡信号；次同步振荡抑制设备，用于根据次同步振荡信号输出次同步振荡阻抗信号；变压器，串联安装输电线路上，用于根据次同步振荡阻抗信号向输电线路中注入次同步振荡阻抗电压；储能设备，用于平抑次同步振荡抑制设备中电容两端电压的波动。储能设备为电容提供有功电能，平抑电容两端的波动。从而可以提高分布式次同步振荡抑制装置的抑制能力，增加抑制次同步振荡的频率范围。
摘要（英）：

The invention discloses a distributed sub-synchronous oscillation suppression device based on energy storage and a new energy transmission system. The sub-synchronous oscillation suppression device isinstalled on a transmission line between a new energy electric field and a bus bar, and comprises signal acquisition equipment, sub-synchronous oscillation suppression equipment, a transformer and energy storage equipment, wherein the signal acquisition equipment is connected with the transmission line and used for acquiring a sub-synchronous oscillation signal on the transmission line; the sub-synchronous oscillation suppression equipment is used for outputting a sub-synchronous oscillation impedance signal according to the sub-synchronous oscillation signal; the transformer is installed onthe transmission line in series and used for injecting sub-synchronous oscillation impedance voltage into the transmission line according to the sub-synchronous oscillation impedance signal; and the energy storage equipment is used for suppressing voltage fluctuations at two ends of a capacitor in the sub-synchronous oscillation suppression equipment. The energy storage equipment provides active electric energy for the capacitor and suppresses the fluctuations at two ends of the capacitor. Therefore, the suppression ability of the distributed sub-synchronous oscillation suppression device canbe improved, and the frequency range of sub-synchronous oscillation suppression is expanded.

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