The East China Power Grid, which has multi-infeed HVDC systems and EHV AC systems, is facing security and stability risks due to its operational complexity and difficulties. 摘要含多饋入直流輸電系統和特高壓交流聯(lián)網(wǎng)的華東電網(wǎng),其運行復雜性和難度使電網(wǎng)安全穩定面臨風(fēng)險。