5.3 Automatic control for pump starting and condenser starting in pumping direction

    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......查看详细>>

标签:水力发电厂自动化设计

5.4 Automatic control from pumping to standstill and from pumping to generating

    5.4.1 The following steps shall be carried out for changeover from pumping mode to standstill.(1) Give a command the governor to close the guide vanes to minimum pump position.(2) Trip the generator circuit breaker and suppress the field.(3) Command the g......查看详细>>

标签:水力发电厂自动化设计

6.1 General requirements

    6.1.1 Each controlled device (oil pumps,water pumps,compressors,etc.) of unit auxiliary equipment and plant common equipment should be provided with three control modes of “manual”,“automatic” and “off”. Each controlled device shall be equipped with a gro......查看详细>>

标签:水力发电厂自动化设计

6.2 Automatic control of oil pressure system

    6.2.1 As each of the oil pressure system,used as the servomotor oil source for butterfly valve,spherical valve and ring gate,is equipped with two oil pumps,the pumps shall be in a lead-lag control arrangement and the main and standby motors shall be autom......查看详细>>

标签:水力发电厂自动化设计

6.3 Automatic control of compressed air system

    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......查看详细>>

标签:水力发电厂自动化设计

6.4 Automatic control of unit service water supply system

    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......查看详细>>

标签:水力发电厂自动化设计

6.5 Automatic control of drainage and dewatering system

    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......查看详细>>

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6.6 Flood prevention system for powerhouse

    6.6.1 Three detectors or more shall be provided at the bottom floor of powerhouse (including operation corridor).6.6.2 Each level detector shall include two sets of output contacts at least. the alarm shall be sent out when water level exceeds the 1st upp......查看详细>>

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6.7 Automatic control of transformer cooling system

    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.......查看详细>>

标签:水力发电厂自动化设计

7.1 Selection of excitation system

    7.1.1 Excitation system shall meet the requirements of the generator and the power grid in various operation modes and in faults.7.1.2 Self-shunt potential source static excitation system should be adopted for excitation system.7.1.3 The relevant paramete......查看详细>>

标签:水力发电厂自动化设计