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在电力系统中,并联运行着的各发电机的转子以相同的电角速度ω旋转着,转子间的相对位移角δ是在允许的极限值以内的。发电机的这种运行状态称为同步(同期)运转。发电机在未投入电力系统以前,与其它发电机一般是不同步的。把发电机投入电力系统并联运行,需进行一系列操作,这一操作过程称为发电机的同期并列(常称并车)。习惯的并列方法为灯光旋转法和灯光熄灭法、但这些传统的并网方法在发电机投入并联的瞬间,往往伴随着电流冲击和功率冲击。如果操作错误将引起系统电压瞬时下降,甚至可能对机组造成机械损环或引起发电机绕组的电气损坏。林区和农村的小电站具有分散性,我国南方山区水利资源丰富,近年来多数林场建立了小型水电站。但因设备或管理问题未充分发挥其潜在能量。为了提
In the power system, the rotors of the generators running in parallel are rotated at the same electrical angular velocity ω, and the relative displacement δ between the rotors is within the allowable limit. This operating condition of the generator is called synchronous (synchronous) operation. Generators are generally out of sync with other generators before they are put into power systems. The generator into the power system parallel operation, the need for a series of operations, this operation is called generators simultaneously (often called and car). Habits of the parallel method for the light rotation method and the light extinguishment method, but these traditional methods of grid-connected generators in the moment, often accompanied by current impact and power shock. If the operation error will cause the system voltage instantaneous decline, and may even cause mechanical damage to the unit or cause electrical damage to the generator winding. Small power plants in the forest and rural areas are dispersive. There are abundant water conservancy resources in mountainous areas in southern China. In recent years, most of the forest farms have established small-scale hydropower stations. However, the potential energy is not fully exploited due to equipment or management issues. To mention