海南电网联网后的频率稳定与措施

海南电网与南方电网主网联网后，基本解决了海南电网存在多年的“大机小网”问题，但也可能面临新的频率稳定问题。对联络线送受电情况下发生故障时对海南电网的影响进行了分析，对联网后海南电网的低频减载和高周切机方案、联络线的稳控措施、联络线的功率控制和海南电网机组的带负荷方案等提出了相应措施。建议联网后应控制联络线功率，并在事故情况下采取迅速的调控措施；孤网情况下应按带负荷方案限制大机组出力；建议在联络线上装设两套安稳装置；建议海南联网后适当调整现有低频减载方案，保留目前的高频切机方案。

Frequency Stability and Control Measures of Hainan Power Grid after Interconnection with China Southern Power Grid

The problem of ＂small power network system containing large capacity generators＂ will be basically solved in Hainan Power Grid after the interconnection of Hainan Power Grid with China South Power Grid （CSG）. But Hainan Power Grid may be facing a new problem of frequency stability. The effects of faults on the tie line on Hainan Power Grid are analyzed, and the measures are proposed on the low frequency load shedding, high frequency generator tripping, stability control and power control of tie lines, the loading schemes of large capacity generators. It is suggested that the power on tie line should be regulated, fast dispaching measures should be taken under faults, large capacity generator output should be limited under islanding situation; it is also suggested that two safety and stability devices should be installed on the tie line, the low frequency load shedding schemes should be regulated but the high frequency generator tripping schemes may be remained unchanged.