Power supply device for converter valve of static VAR generator
A technology of static reactive power and energy extraction device, applied in the field of power electronics, can solve problems such as inability to meet requirements, achieve the effects of low cost, small size, and avoidance of interference
Active Publication Date: 2015-05-13
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Problems solved by technology
In this working mode, the traditional high-voltage self-energy-generating method of the appeal will not meet the requirements
Method used
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[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0037] see figure 1 , which is a schematic diagram of the energy harvesting device for the static var generator converter valve provided by the present invention.
[0038] An embodiment of the present invention provides an energy harvesting device for a static var generator converter valve, including: a high-frequency constant current source 100, a high-voltage cable 300, an energy harvesting circuit board 200, and an energy harvesting current transformer 400;
[0039] The input end of the high-frequency constant-current current source 100 is connected to an AC 380V power supply, and the AC 380V is rectified and inverted to form a high-frequency constant-current current;
[0040] The output end of the high-frequency constant-current c...
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The invention provides a power supply device for a converter valve of a static var generator. The power supply device comprises a high-frequency constant-current power supply, a high-voltage cable, power supply circuit boards and power supply current transformers. An input end of the high-frequency constant-current power supply is connected with a 380V alternating-current power supply, and the 380V alternating-current power supply is rectified and inverted into high-frequency constant currents. An output end of the high-frequency constant-current power supply is in short circuit through the high-voltage cable. The high-voltage cable penetrates through the N feed-through power supply current transformers which are arranged on the converter valve of the static var generator in a series connection manner, wherein the N is larger than or equal to integer of 1. A secondary side of each power supply current transformer is connected with one corresponding power supply circuit board on the converter valve of the static var generator. The power supply circuit boards convert high-frequency currents into stable direct-current voltage so as to supply a working power supply for an IGBT (insulated gate bipolar translator) drive circuit and a protective circuit on the converter valve of the static var generator. The power supply device is free of high-voltage current transformers, and accordingly is small in size and low in cost.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to an energy harvesting device for a static var generator converter valve. Background technique [0002] In recent years, the power system power management device technology has developed rapidly, and the relevant key equipment has changed from a thyristor controlled reactor (TCR: Thyristor Controlled Reactor) thyristor valve to a static var generator (SVG: Static Var Generator) converter valve. SVG converter valve consists of IGBT devices and related drive, protection, and power circuits. The circuit board is installed at high potential, and special methods must be adopted to realize stable and reliable energy harvesting of the high potential circuit board. The traditional design energy harvesting method is a high-voltage self-energy harvesting method, that is, the DC voltage on the supporting capacitor of the converter module is obtained through DC / DC conversion. The d...
Claims
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IPC IPC(8): H02M7/12H01F38/30
Inventor 曹洋谭胜武杨磊吕顺凯彭勃梁文超徐振初蕊曹超王桂华
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS