求翻译：当断面1传输功率提高397MW时可确保系统稳定，继续增加功率则会承担一定的失稳风险，当传输功率达到系统N-1热稳极限时，失稳概率接近1%，对于所研究的短时段风险较高。可根据预先制定的安全稳定导则，选取合适的概率用以确定失稳风险在可接受范围内的ATC，本系统取0.001，得到断面1可用输电能力为417MW。是什么意思？

When the cross-section of a 397MW transmission power can be increased to ensure system stability, power will continue to increase the instability to take some risks, when the transmission power of the system N-1 thermal stability limit, the instability probability close to 1%, for the study of short

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When the cross section 1 transmission power enhances 397MW may guarantee the system to be stable, continues to increase the power to be able to undertake certain jitter risk, when the transmission power achieved when system N-1 hot steady limit, jitter probability close 1%, regarding the short time

When section 1 transmit power to improve 397MW ensures system stability, continue to increase the risk of power will take a certain amount of instability when transmit power system N-1 thermal stable limit is reached, failure probability close to 1% or, for short periods in the study of higher risk.

When the cross-section of a 397MW transmission power can be increased to ensure system stability, power will continue to increase the instability to take some risks, when the transmission power of the system N-1 thermal stability limit, the instability probability close to 1%, for the study of short