电力系统Electric power system

电力系统Electric power system(中文5200字,英文3500字)
1 电力的技术特点
电力具有独特的技术特点，这使得电力工业具有独特的行业特点。
1.无形性。用户不能用人体感官直接察觉千瓦时的用电量。
2.质量。供电质量可由供电连续性或供电可靠性、在标准电压等级下的电压均等性、交流电压频率的正确不变性来度量。
3.电力的贮存。与大多数行业不同，电力部门必须随时根据用电的需求生产出电力来，因为电能无法贮存。
4.对供电负责。电由电力部门输送到用户，因此必须对安全、可靠供电负责。
5.对公众的安全。电力部门须对公众及其技术人员提供稳妥的保护。

Electric power system
1 Technical Characteristics of Electric Power
    The electric power has unique technical characteristics which give the power industry certain unique characteristics.
1    Intangibility. The customer cannot directly detect a kilowatt-hour with any of his physical senses.
2    Quality. The quality of service can be measured by service continuity or reliability, uniformity of voltage at the proper level, proper and uniform frequency of the alternating voltage.

3    Product storage. Unlike most businesses, the electric power utility must create its product simultaneously with its use because there is no storage of electricity.
4    Responsibility for power service. Because the utility delivers its product to the customer’s premises it must assume responsibility for the safe and reliable delivery of its product.
5    Public Safety. The utility must provide reasonably adequate protection for the public and its own skilled workers.
2 Power System Planning
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