首钢京唐供电系统孤网运行的可行性研究

Feasibility Study of Isolated Power Grid Operation of Power Supply System of Shougang Jingtang Co.

首钢京唐电力系统的特点是虽为用电负荷中心但与主电网联系薄弱,一旦形成孤网后,自备发电机组成为唯一电源。在失去外部电源的情况下,维持发电机组孤网运行对钢铁厂的安全至关重要。由于钢铁厂冲击性用电负荷比重较大,机组孤网运行有一定困难,从发电机一次调频、负荷平衡、低周减载方面探讨维持机组孤网运行的可能并给出相关建议。

The character of the power grid in Jingtang Co. is that although it is the power load center yet it has weak linkage with the main power grid. Once it becomes an isolated power grid, it＇s generator set becomes the only power supply. Maintaining isolated grid operation of the generator set is very important for safety of iron and steel plants in the case of a loss of external power supply. The isolated grid operation of the generator set has certain difficulty due to large impact load proportion of the iron and steel plants. The feasibility to maintain the isolated grid operation of the generator set is discussed from generator＇s primary frequency, load balancing and under frequency load shedding, and some suggestions are of- fered.