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CN101813729A 一种直流融冰装置空载加压试验及保护方法 无效 - 撤回 转让

一种直流融冰装置空载加压试验及保护方法
摘要：
本发明是一种直流融冰装置空载加压试验及保护方法。包括有如下步骤：1)将直流融冰装置与融冰母线连接；2)直流侧开路，合上给直流融冰装置供电开关；3)设定线路开路试验的直流电压参考值，发出开始空载加压试验命令，直流电压以预先设定的速度线性变化，保持一定时间；4)确认无异常发生，停止空载加压试验，闭锁换流阀。本发明能够在不接入直流线路情况下就能够检查换流阀、直流侧刀闸和融冰母线的直流电压耐受能力，检查换流阀的触发能力，检查控制保护系统的控制功能，保证直流融冰装置在需要融冰的时候能够可靠地投入运行。本发明是一种方便实用的直流融冰装置空载加压试验及保护方法。
摘要（英）：

The invention discloses a no-load applied voltage test and protection method for a DC ice-smelting device. The method comprises the following steps of: 1) connecting the DC ice-smelting device with an ice-smelting bus; 2) opening the circuit on the DC side, and turning on a power switch of the DC ice-smelting device; 3) setting a DC voltage reference value of the open circuit test of the circuit, sending a command for beginning the no-load applied voltage test out, performing linear change on the DC voltage at the preset speed, and maintaining a certain time; and 4) determining no abnormality, stopping the no-load applied voltage test, and locking a converter valve. Due to the adoption of the applied voltage test and protection method, the DC voltage endurance capacity of the converter valve, a DC side disconnecting link and the ice-smelting bus can be checked under the condition of not connecting the DC circuit, the triggering capacity of the converter valve is checked, the control function of the control and protection system is checked, and the DC ice-smelting device can be reliably operated when the ice needs to melt. The no-load applied voltage test and protection method for the DC ice-smelting device are convenient and practical.

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