An Active Anti-Condensation Method Based on Reactive Circulating Current Control
A circulation control and anti-condensation technology, which is applied in the transformation equipment for intermediate conversion to DC, cooling/ventilation/heating transformation, wind power generation, etc., can solve the problem that the temperature control resolution cannot be guaranteed, and the stepless smooth adjustment cannot be realized Temperature and other problems, to achieve the effect of high temperature control accuracy and fast dynamic response
Active Publication Date: 2019-04-05
上海中绿新能源科技有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The method of starting and stopping cannot realize stepless and smooth temperature adjustment, and the resolution of temperature control cannot be guaranteed
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0040] Loss-based thermal control technology is to change the thermal environment of power devices by controlling the loss of power modules. The loss of power devices IGBT and DIODE consists of conduction loss and switching loss. When the power device is finalized and the DC bus voltage is constant, the IGBT conduction loss is only related to the modulation mode of the load current machine, while the switching loss is related to the load current and the turn-on loss energy E SW(on) , Turn-off ene...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides an active anti-condensation method based on reactive circulation control. The method aims at the doubly-fed totally enclosed wind power converter. The method comprises the stepsthat the condensation point temperature is calculated according to the air humidity and the temperature in a converter cabinet and acts as the set temperature value of a thermal control closed loop,and the thermal control closed loop output obtains the set reactive circulation value through calculation; and thermal control based on the reactive circulation is performed according to the change situation of the wind power so that the temperature of the heat radiator in the cabinet is enabled to be constantly higher than the condensation point temperature of the air in the cabinet, and condensation in the converter cabinet can be prevented. Only the control strategy of the converter requires to be modified without additional arrangement of any auxiliary device; the method is based on the loss control technology of the combined reactive circulation control of the doubly-fed induction generator (DFIG) and the converter so that the dynamic response is fast; the temperature control accuracyis high, and the method is still suitable especially when the humidity in the cabinet is quite high and the temperature difference is low; and the technical scheme is simple without reconstruction ofthe converter or the unit and can greatly realize condensation prevention.
Description
technical field [0001] The invention relates to the technical field of converter control, in particular to an active anti-condensation method based on reactive circulating current control. Background technique [0002] At present, wind power is developing on a large scale, covering areas including seas, tidal flats and other areas with high humidity and high salt fog. Humid, high-salt spray environment not only easily causes rust and aging of the converter system cabinet, reduces the structure and insulation strength, but also seriously affects the working life of electrical equipment and switching devices. Therefore, the cabinet structure of offshore wind power converters needs to meet the protection requirements for fine dust, moisture, and salt spray. In the operating environment of offshore wind turbines, if the converter adopts the wind cooling mode, it will inevitably inhale a large amount of corrosive air with salt mist and moisture, which will adversely affect the l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/44H05K7/20H02J3/38
CPCY02E10/76
Inventor 张建文陈根蔡旭
Owner 上海中绿新能源科技有限公司