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| 摘要: |
| 针对我国电网将出现特高压/超高压电磁环网,甚至是特高压/超高压/高压多级电磁环网的情况,从功率转移和短路电流水平两方面论述了高低压电磁环网的危害.计算分析了2010年华北-华中特高压同步电网的多级电磁环网运行方式,指出该运行方式的存在使系统网络结构复杂,潮流分布不合理,短路电流水平增高,运行调度管理不便,易造成系统稳定破坏.综合考虑系统静态安全性、暂态稳定性和运行经济性,引入线路或变压器过负荷指标、母线电压越限指标、最大发电机功角差指标、短路电流水平指标以及系统网损指标,应用模糊综合评价程序对高低压电磁环网开环方案作出定量的评价.评价结果表明,应当及时解开500 kV/220 kV电磁环网,避免形成多级电磁环网,并适时解开1 000 kV/500 kV电磁环网. |
| 关键词: 多级电磁环网 安全稳定性 短路电流 模糊综合评价 特高压 |
| DOI： |
| 分类号:TM711 |
| 基金项目: |
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| Influence of electromagnetic loop in early ultra-high voltage grid |
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YANG Dong LIU Yutian
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| Abstract: |
| The ultra-high / extra-high voltage electromagnetic loop,or the ultra-high / extra-high / high voltage electromagnetic loop,may appear in China power grid. Its hazards are discussed from the power transfer and short-circuit current level. The multi -level electromagnetic loop operating mode of North and Central China power grid in 2010 is analyzed and its drawbacks are pointed out:complex network structure,unreasonable power flow distribution,higher short-circuit current level,inconvenient dispatch manageme... |
| Key words: multi - level electromagnetic loop security and stability short -circuit current fuzzy compre- hensive evaluation ultra-high voltage |
