5.1.1 Starting methods for reversible pumped-storage units in pumping mode shall be selected through technical and economical comparison according to practical conditions of units,power plants and power grid.5.1.2 In order to reduce the hydraulic resistan...[继续阅读]

    6.4.1 When adopting pump water supply system for each unit (or secondary circulation water system with filters),the control of pumps shall meet the following requirements.(1) The main pump shall start automatically as unit starts,and keeps working as unit...[继续阅读]

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    6.3.1 When each compressed air system is equipped with several compressors,the compressors shall be designed in lead-lag control arrangement. When the air pressure of compressed air tank decreases to the 1st lower limit,the main compressor shall be starte...[继续阅读]

    7.6.1 Field flashing shall possess automatic mode and manual mode. Manual mode is only used for commissioning. When the unit speed rises from 0% to 95% of the rated speed,the field flashing device shall be applied automatically or manually. When the volta...[继续阅读]

    7.3.1 Excitation system shall be provided with automatic de-excitation equipment,and inversion de-excitation should be adopted during normal stop and emergency shutdown due to mechanical faults. In case of electrical faults,linear or nonlinear resistor de...[继续阅读]

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    5.3.1 The process for unit pump starting and condenser starting in pumping direction shall be as the followings.(1) Unit starting mode and unit to be started have been selected.(2) Pumping operation conditions of the selected unit are met.(3) The selected...[继续阅读]

    6.7.1 Fans shall keep working during operation of oil-natural-air-forced (ONAF) transformer and air-forced-cooling dry-type transformer. The permissible load and operation time of transformers without fans shall meet the requirements of manufacturers.6.7....[继续阅读]

    6.5.1 When the water level of drainage sump rises to the 1st upper limit,the main pump shall be started automatically. If the water level rises to the 2nd upper limit,the standby pump shall be started automatically,and the alarm shall be sent out. When wa...[继续阅读]