Power System 面试题与答案
问题 21. What is the significance of power system stability?
Power system stability ensures that the system can return to a balanced and steady-state condition after disturbances. It is crucial for maintaining reliable and secure power system operation.
问题 22. Explain the purpose of a capacitor in a power system.
A capacitor is used to provide reactive power support and improve power factor. It absorbs and releases reactive power as needed, helping in voltage control and enhancing the efficiency of the power system.
问题 23. Discuss the concept of black start capability in power systems.
Black start capability refers to the ability of a power system to restart and restore operations after a complete blackout. Power plants with black start capability can initiate the restoration process without external power sources.
问题 24. What is the role of a transformer tap changer in a power system?
A tap changer is used to adjust the turns ratio of a transformer and, consequently, the output voltage. It helps in maintaining voltage within acceptable limits despite variations in load and system conditions.
问题 25. Explain the concept of power quality in power systems.
Power quality refers to the stability and reliability of the voltage and current supplied to electrical devices. Poor power quality can lead to equipment malfunctions, and measures are taken to ensure a consistent and high-quality power supply.
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