超高压电磁环网的特点与案例分析

发布时间：2019-01-30 19:14

【摘要】：针对仍普遍存在的超、特高压电磁环网,结合省级电网的实例总结了电磁环网的不同发展形态和结构,认为电磁环网的主要风险在于潮流转移和控制,并提出了衡量电磁环网强弱和风险的耦合度指标。在网络结构优化和加强方面,认为强耦合的弱电磁环应优先加强上级电网,弱耦合的强电磁环应优先考虑短路控制和简化结构,多级电磁环应尽快解耦等,分析了电磁环网的典型分片方案。鉴于超、特高压电磁环网将长期存在,阐述了电磁环网单一和连锁跳闸后实用化的潮流转移控制方法,特别是针对大功率、强耦合型电磁环网提出了一种严重故障后快速切除联络元件的非常规稳定控制措施,以实现解耦控制、均衡潮流,有效提升过渡期电网的稳定水平和输电能力。在实际电网中的多个应用实例表明其效果良好。
[Abstract]:In view of the existing ultra-high voltage electromagnetic loop network, combined with the examples of provincial power grid, the paper summarizes the different development forms and structures of the electromagnetic loop network, and considers that the main risk of electromagnetic loop network lies in the power flow transfer and control. The coupling index to measure the strength and risk of electromagnetic loop network is proposed. In the aspect of network structure optimization and strengthening, it is considered that the strong coupling weak current magnetic ring should give priority to strengthening the superior power network, the weak coupling strong electric magnetic ring should give priority to short circuit control and the simplified structure, and the multistage electromagnetic ring should be decoupled as soon as possible. The typical slice scheme of electromagnetic ring network is analyzed. In view of the ultra-high voltage electromagnetic loop network will exist for a long time, this paper expounds the practical power flow transfer control method after the single and interlocking tripping of the electromagnetic loop network, especially for the high power. In order to realize decoupling control, equalize power flow, and effectively enhance the stability level and transmission capacity of transitional power network, a new unconventional stability control measure is proposed for the strong coupling electromagnetic loop network. A number of examples in practical power grid show that the effect is good.
【作者单位】：国网湖北省电力公司;中南电力设计院;

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