在电力的众特性之中，电力系统工程师主要关心的是保持恒定的工作频率。
Of the characteristics of electric power, the primary concern of the electric power system engineers is to maintain a constant operating frequency.
大电力系统可靠性是一项复杂的系统工程，要在设计、运行、管理和用电过程各个环节精心策划。
Bulk power system reliability is a complex system, and it needs to be thought much and be planed carefully during the period of design, operation, management and consumption phases.
大电力系统可靠性是一项复杂的系统工程，要在设计、运行、管理和用电过程各个环节精心策划。
Bulk power system reliability is a complex system, and it needs to be thought much and be planed carefully during the period of design, operation, management and consumption phases.
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