A control method of a hybrid energy-consuming device
A technology of energy-consuming devices and control methods, applied in the direction of power transmission AC network, climate sustainability, AC network voltage adjustment, etc., can solve the problems of increase and high price, and achieve the effect of reducing costs and reducing costs
Active Publication Date: 2022-07-05
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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Problems solved by technology
The centralized energy consumption device is composed of an energy consumption branch and an energy consumption resistor. After detecting the rise of the DC voltage, the energy consumption resistor is used to undertake the consumption of power surplus. However, the centralized energy consumption device cannot maintain the stability of the DC voltage during the input stage. ; The distributed energy consumption device can still maintain the stability of the DC voltage during the input stage of the energy consumption device, and has high performance, but the distributed energy consumption device is composed of a large number of sub-modules, and each sub-module contains semiconductor IGBT devices, and the price of IGBT The high cost of distributed energy consumption devices has increased to a certain extent
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[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0025] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and / ...
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The invention relates to a hybrid energy-consuming device and a control method thereof, comprising a centralized energy-consuming device and a distributed energy-consuming device connected in parallel at a DC line end; the centralized energy-consuming device and the distributed energy-consuming device can be put in separately or invest at the same time. The invention not only inherits that the distributed energy consumption device can stabilize the direct current voltage during the fault, but also reduces the current withstand capability of the semiconductor device of the distributed energy consumption device by introducing the centralized energy consumption device, and reduces the cost of the energy consumption device .
Description
technical field [0001] The invention relates to the technical field of high-power power electronic converters, in particular to a hybrid energy-consuming device and a control method thereof. Background technique [0002] Because of its self-shut-off capability, the flexible DC transmission system does not need an external commutation voltage, which overcomes the fundamental defect that the receiving end of the traditional high-voltage DC system must be an active network, making it an excellent solution for island power transmission and offshore wind power transmission. Program. In a flexible DC transmission system, after an AC system failure occurs in the receiving-end system, the power of the sending-end system cannot be sent out during the fault, which will lead to an increase in the DC line voltage, which will bring a severe test to the insulation level of the equipment in the entire system. As an important equipment of the flexible DC transmission system, the energy-con...
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IPC IPC(8): H02J3/36H02J3/14
CPCH02J3/36H02J3/14Y04S20/222Y02E60/60Y02B70/3225
Inventor 晁武杰唐志军林国栋林少真郭健生胡文旺李钢邹凯凯王仙荣胡仙来
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD