Reactive power detection device and method
A power detection and power technology, applied in the field of electric power, can solve the problems of large reactive power error, poor real-time performance, and large calculation amount, and achieve the effect of small reactive power error, strong real-time performance, and small calculation amount
Active Publication Date: 2020-11-27
XINJIANG GOLDWIND SCI & TECH CO LTD
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Problems solved by technology
[0005] However, using the Fourier measurement method to detect reactive power requires a large amount of calculation
Using the digital phase-shift measurement method to detect reactive power has poor real-time performance, and if there are multiple harmonics in the measured, the detected reactive power has a large error
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[0021] The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.
[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and ...
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An embodiment of the invention discloses a reactive power detecting device and a method. The method comprises the following steps: collecting the current voltage and the current current of a target point to be detected of a circuit to be detected of each subsystem in a wind power generation system; determining a first component and a second component of the current voltage and the current currentrespectively, wherein the second component is a component that is 90 degrees out of phase with the first component; and calculating the current reactive power of the target point to be detected basedon the first component and the second component of the current voltage and the current current. According to the reactive power detecting device and the method of the embodiment of the invention, thecalculation amount and errors of the reactive power detection can be reduced, and the real-time effect of the reactive power detection can be improved.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a reactive power detection device and method. Background technique [0002] In the power grid, there are two types of electric power supplied by the power source to the load: one is active power and the other is reactive power. Active power is the electrical power required to keep electrical equipment running normally, that is, the electrical power that converts electrical energy into other forms of energy (mechanical energy, light energy, thermal energy). Reactive power is the electrical power used to create and maintain electric and magnetic fields in electrical circuits and to establish and maintain magnetic fields in electrical equipment. [0003] Inappropriate reactive power will cause problems such as increased equipment capacity, increased equipment and line losses, overheating, and excessive line transmission voltage drop during the operation of the power system....
Claims
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IPC IPC(8): G01R21/00G01R21/06
CPCG01R21/003G01R21/06
Inventor 唐碧琴蒋中川
Owner XINJIANG GOLDWIND SCI & TECH CO LTD