Energy release device and high-voltage power transmission system
A power transmission system and energy discharge technology, applied in the fields of energy discharge devices and high-voltage power transmission systems, can solve problems such as high price, and achieve the effects of low cost and simple structure
Pending Publication Date: 2020-01-03
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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- Application Information
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Problems solved by technology
However, equipment such as DC circuit breakers are expensive
Method used
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Embodiment Construction
[0034] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0035] First, the inventive concept of the energy release device provided by the embodiment of the present invention is introduced:
[0036] Whether it is the protective components with fixed parameters and performance that are usually used in the existing technology to realize the overvoltage energy discharge, or the energy discharge through the controllable arrester, it is all based on how to release the overvoltage in the transmission network. Timely release the overvoltage in the transmission network to ensure the normal operation of the power grid. For example, in the prior art, when the voltage of the transmission network exceeds m% of the rated transmission voltage (m is a constant), the method of controlling the discharge of the lightning arrester is usually used to ensure the normal operation of the transmission network.
[0037] However, in the presen...
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The invention provides an energy release device and a high-voltage power transmission system, and relates to the field of power systems. According to the embodiment of the invention, when a voltage ofa VSC is too high, the energy transmitted to the VSC can be absorbed in time, and the VSC is prevented from breaking down. The energy release device provided by the embodiment of the invention is applied to a high-voltage direct-current power transmission system, the first end of the energy release device is connected with the high-voltage end of a voltage source converter VSC, and the second endof the energy release device is connected with the grounding end of the voltage source converter VSC; the energy release device comprises a fixed energy release element and a control module, whereinthe fixed energy release element and the control module are connected in series between the first end of the energy release device and the second end of the energy release device; the fixed energy release element comprises a plurality of energy dissipation units which are connected between the first end and the second end of the fixed energy release element in series; and the control module is used for conducting the first end and the second end of the control module when detecting that the voltage borne by the VSC is greater than the threshold voltage. The device is applied to electric powerenergy release.
Description
[0001] This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office on July 12, 2019, with application number 201910631564.8 and the application title "An energy leakage device", the entire content of which is incorporated into this application by reference. Technical field [0002] The invention relates to the field of power systems, and in particular to an energy discharging device and a high-voltage power transmission system. Background technique [0003] High-voltage power transmission is a method that uses a transformer in a power plant to step up the voltage output by a generator and then transmit it. The reason why this method of power transmission is adopted is that under the same transmission power, the higher the voltage, the smaller the current. In this way, high-voltage power transmission can reduce the current during power transmission, thereby reducing the heat loss caused by current and reducing the mate...
Claims
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IPC IPC(8): H02H9/04H02J3/36
CPCH02H9/041H02J3/36Y02E60/60
Inventor 刘杉刘泽洪王绍武郭贤姗肖鲲林畅常彬庞辉
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD