一些单位为了提高并联电容器装置的运行安全可靠性，选择设备时预留一定的裕度，如提高所选择电容器的额定电压。
In order to improve the safe reliability of shunt capacitor devices, some units like to enlarge the reserved capacity, such as increasing the rated voltage of capacitor, when they choose equipment.
分析了轨道交通直流牵引供电系统的直流设备电压型框架保护装置与轨道电位限制装置定值和时间配合存在的问题及解决办法。
It analyses the rail transit DC traction power supply system voltage type frame protect device and rail voltage limited device matching problems that solve their adjusting value and time.
控制参数的引入可以使电压无功控制装置根据系统运行状态不断修正电压和无功的上下限值，从而使控制策略具有一定的自适应性。
The control parameter can help to modify the voltage and reactive power's upper limit and lower limit, which make the control tactics adaptive.
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