Expandable long-distance power transmission frequency-converter device
A technology for power transmission and frequency conversion devices, which is applied in the field of power transmission devices and long-distance power transmission frequency conversion devices. Less harmonic content and less interference
Inactive Publication Date: 2016-01-20
武汉华海通用电气有限公司 +1
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[0006] In view of the above defects or improvement needs of the prior art, the present invention provides an expandable long-distance power transmission frequency conversion device, which aims to solve the technical problem that the maximum output voltage and maximum output power of the existing frequency conversion device are fixed and cannot be adjusted
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, 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 used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0027] The scalable long-distance power transmission frequency conversion device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The scalable long-distance power transmission frequency conversion device provided by the embodiment, such as figure 1 As shown, it includes 4 input rectifier modules (1, 2, 3,...
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The invention discloses an expandable long-distance power transmission frequency-converter device, which comprises N rectifier modules, N inverter modules, an EMI filter, and a control unit. The N rectifier modules are connected in parallel with the mains supply. The input ends of the N inverter modules are connected with the output ends of the rectifier modules. The output ends of the N inverter modules are connected in series and then are connected with the EMI filter. The output end of the EMI filter is used for being connected with a load. The rectifying signal interface end of each rectifier module is connected with the rectifying control signal port of the control unit. The inverter signal interface end of each inverter module is connected with the inverter control signal port of the control unit. According to the technical scheme of the invention, the alternating current of the mains supply is converted into N direct-current voltages by N rectifier modules, wherein the input ends of the N rectifier modules are connected in parallel. Meanwhile, the N direct-current voltages are further improved. By means of the N inverter modules, the power supply is inverted based on the N increased direct-current voltages. The output ends of the N rectifier modules are connected in series, so that the variable-frequency high-voltage alternating current is realized.
Description
technical field [0001] The invention belongs to the field of power electronic equipment, relates to an electric energy transmission device, and in particular to an expandable long-distance electric energy transmission frequency conversion device. Background technique [0002] In the fields of oil and gas, coal mining, etc., electrical equipment works thousands of meters underground, and fans, pumps, submersible motors and other equipment need variable frequency power supply to realize variable frequency operation, adjust the speed to meet the requirements of mechanical loads, and save energy at the same time. However, the underground environment is harsh and there are many flammable and explosive gases. It is safer to use the variable frequency power supply on the well for long-distance power transmission. At present, the frequency conversion power supply used in this field has the following problems: [0003] 1. The existing frequency conversion device is designed for a sp...
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IPC IPC(8): H02M5/44
Inventor 彭新欧阳晖王爱新刘文革胡清波周永峰宋宏璋王炜柳彬刘庸皇丰辉曾祥孔王玮
Owner 武汉华海通用电气有限公司