Capacitance adjusting method for intelligent power capacitor
A capacitor adjustment and smart power technology, applied in the direction of reactive power adjustment/elimination/compensation, reactive power compensation, etc., can solve the problems of reducing system capacity, increasing reactive power loss, and increasing power loss
Inactive Publication Date: 2014-11-26
CHAOHU JINHUI AUTOMATIC CONTROL EQUIP
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Problems solved by technology
[0002] In the low-voltage power supply system, the inductive load is the main reason for the reduction of power factor, resulting in increased reactive power loss, increased power loss, and reduced system capacity.
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[0014] The content of the present invention will be described below in conjunction with specific embodiments.
[0015] Such as figure 1 As shown, it is a schematic flow chart of the method for adjusting the capacitance of an intelligent power capacitor according to the present invention. The method for adjusting the capacitance of an intelligent power capacitor according to the present invention comprises the following steps:
[0016] Step 1: Determine the capacitive load value X0 to be compensated according to the reactive power compensation method and the real-time monitored circuit parameters. Knownly, the X0 mainly has the following calculation methods to choose from depending on the way of reactive power compensation:
[0017] Formula 1: Input the average active power P of the historical maximum load of the power grid. The power factor obtained by real-time monitoring before compensation is cosΦ1, and the expected power factor after compensation is cosΦ2. The calculatio...
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The invention discloses a capacitance adjusting method for an intelligent power capacitor. The method includes the steps that first, a capacitive load value needing to be compensated is determined; second, a compensation value set of supplied capacitive loads is determined; third, the compensation values of the supplied capacitive loads are sequentially compared with the capacitive load value needing to be compensated from large to small starting from the maximum value in the compensation value set of the supplied capacitive loads, when the compensation value of the supplied capacitive loads is smaller than or equal to the capacitive load value needing to be compensated, comparison is completed, and the compensation value of the supplied capacitive loads smaller than or equal to the capacitive load value needing to be compensated is acquired; fourth, according to the compensation value of the supplied capacitive loads, which is smaller than or equal to the capacitive load value needing to be compensated and is obtained in the third step, the specific investment or excision scheme of each capacitor single body is determined. The reasonable investment or excision schemes of the capacitor single bodies can be provided in accordance with the capacitive load value needing to be compensated in a circuit.
Description
technical field [0001] The invention relates to a method for adjusting the capacitance of an intelligent power capacitor, and belongs to the technical field of intelligent control methods for capacitors. Background technique [0002] In the low-voltage power supply system, the inductive load is the main reason for the reduction of the power factor, resulting in increased reactive power loss, increased power loss, and reduced system capacity. Smart power capacitors are mainly used to compensate capacitive loads in the power supply system. When the compensation capacitors are put in or removed in a timely manner, the capacitive loads of the capacitors can be used to offset the inductive loads, so that the load characteristics are close to a purely resistive state, thereby improving the power factor. In order to avoid the situation that the capacitive load is greater than the inductive load, the input or removal of the compensation capacitor needs to be determined according to ...
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Login to View More IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 何来传
Owner CHAOHU JINHUI AUTOMATIC CONTROL EQUIP