An active optical splitter for HVDC converter valve tower
A technology of optical splitter and converter valve, which is applied in the direction of converting AC power input into DC power output, output power conversion device, electrical components, etc. The effect of superior electromagnetic compatibility
Active Publication Date: 2016-08-24
STATE GRID CORP OF CHINA +2
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Problems solved by technology
However, due to the high voltage level of HVDC, the pulse transformer needs to isolate the high potential of the valve body from the low potential of the low-voltage side power supply, which is very difficult to implement
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] The invention provides a new type of active optical splitter for HVDC converter valve towers, which is designed to reduce the number of optical fibers from VBE to converter valve towers. Taking the current converter as an example, the active optical splitter receives two trigger fiber signals from VBE and divides them into several independent trigger fiber signals to the thyristor stage of the converter valve, and at the same time realizes the functions of fiber self-test and fiber laser energy harvesting . Due to the complex structure of the converter valve tower of the main HVDC power transmission main equipment, the total thyristor levels of the 12-pulse unipolar converter valve tower reach thousands of levels, and each level needs two kinds of optical fibers to communicate with the VBE, which is about several thousand before using the present inven...
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The invention provides an active optical splitter used for a high-voltage direct-current transmission converter valve tower. The active optical splitter comprises an optical path switching unit, an active optical splitting unit, an active optical splitter standby unit, an optical fiber self-detection unit and a laser energy-taking unit, wherein the optical path switching unit enables an optical fiber access to be switched from the active optical splitting unit to the active optical splitting standby unit, the optical fiber self-detection unit monitors optical fibers from a valve-base electronic device, and the laser energy-taking unit supplies power to the active optical splitter. The active optical splitter used for the high-voltage direct-current transmission converter valve tower is used on the converter valve tower, the number of signal triggering optical fibers, sent to the valve tower, of each converter valve is reduced from 72 to 4, the total quantity of needed optical fibers of the 12-pulsation converter valve tower is 912 and less than 55% of the original quantity, and workload of building, maintenance and overhaul can be effectively reduced.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an active optical splitter used for a high-voltage direct current transmission converter valve tower. Background technique [0002] In recent years, with the rapid development of the economy and the improvement of people's awareness of environmental protection, the demand for clean energy has been increasing. New energy: wind farms and photovoltaic farms have been used on a large scale. These new energy bases are generally built in remote areas in the northwest, far from The main grid is greatly affected by the climate, and the power provided is extremely unstable. Therefore, UHV transmission channels are needed to send these powers to the main grid in densely populated areas in the east for consumption. For this reason, my country has built a number of DC in recent years. transmission lines. [0003] The equipment of EHV / UHV DC transmission projects generall...
Claims
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IPC IPC(8): H02M7/00G02B6/42
Inventor 王华锋曹均正刘宁郑林杨树森王斌泽
Owner STATE GRID CORP OF CHINA