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中文摘要：
详细分析比较了2种不同结构微型燃气轮机的双模式运行特性和并网技术方案。首先从燃机结构、控制方法、双模式运行特性以及并网运行时对传统保护配置的影响等角度研究对比了2种微型燃气轮机的并网技术方案；然后通过算例仿真比较了不同10kV线路故障下微型燃气轮机的动态特性。研究表明：Ⅱ型微型燃气轮机在外部系统故障情况下，提供的短路电流明显，影响到上级保护的配置和选型；Ⅱ型微型燃气轮机可以实现模式间的无缝转换，但模式转换条件相对Ⅰ型微型燃气轮机严格；Ⅰ型微型燃气轮机无法实现模式的无缝转换，但提供的短路电流较小，且并网运行时受其他10kV线路故障冲击影响较小。
英文摘要：
Dual mode characteristics and grid-connection schemes with two different structure micro turbines are compared. Firstly, the system strueture, controller, dual mode operating schemes and the influence on the traditional system protection are compared. The dynamical characteristics are compared via simulating different 10 kV line faults. The results indicate that type Ⅱ micro turbine contributes larger short circuit currents, which has worse influence on the upper level protection scheme and equipment specifications. Furthermore, type Ⅱ turbine needs more rigid mode changeover conditions. Type Ⅰ turbine cannot change over seamlessly, but has less influences by other 11kV line faults when connected, and contributes less short circuit currents.
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