A multi-terminal flexible direct current transmission control method
A DC transmission control, multi-terminal flexible technology, applied in AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problems of poor operation stability of flexible DC transmission systems, not considering uncertain parameters, etc., to improve the operation stability. , the effect of improving the accuracy
Active Publication Date: 2019-04-19
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a multi-terminal flexible direct current transmission control method, which is used to solve the problem that the existing multi-terminal flexible direct current transmission control method does not consider the uncertain parameters in the multi-terminal flexible direct current transmission system, which leads to the operation stability of the flexible direct current transmission system poor technical issues
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[0032] In order to further illustrate the multi-terminal flexible direct current transmission control method provided by the embodiment of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.
[0033] see figure 1 and figure 2 , the multi-terminal flexible direct current transmission control method provided by the embodiment of the present invention includes:
[0034] Step S100, obtaining the transmission parameters of the AC side of the converter station connected to the AC unit in the dq coordinate system (synchronous rotating coordinate system) in the multi-terminal flexible direct current transmission system, and the transmission parameters of the direct current transmission network in the multi-terminal flexible direct current transmission system ;
[0035] Step S200, according to the transmission parameters of the AC side of the converter station and the transmission parameters of the DC transmission network,...
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The invention discloses a multi-end flexible direct current power transmission control method, and relates to the control technical field of an electronic and electric power apparatus for improving the operating stability of a flexible direct current power transmission system. The control method comprises the steps of obtaining a power transmission parameter on an alternating current side of a convertor station, and a power transmission parameter of a direct current power transmission network under a dq coordinate system in the multi-end flexible direct current power transmission system; establishing a state space mathematical model under the dq coordinate system; establishing a passive output function model under the dq coordinate system, wherein an independent variable in the passive output function model is an uncertain comprehensive parameter in the flexible direct current power transmission system; establishing a system control mathematical model under the dq coordinate system; establishing a zero dynamic state mathematical model under the dq coordinate system, wherein an independent variable in the zero dynamic state mathematical model comprises an uncertain parameter in the multi-end flexible direct current power transmission system while a dependent variable is the uncertain comprehensive parameter; establishing an adaptive control mathematic model of the uncertain parameter; and calculating a system control reference value of the multi-end flexible direct current power transmission system.
Description
technical field [0001] The invention relates to the technical field of electronic power device control, in particular to a multi-terminal flexible DC transmission control method. Background technique [0002] In recent years, under the conditions of environmental degradation and resource demand, long-distance, high-voltage, and large-capacity power transmission is often required. In this case, power transmission with less loss, easier adjustment performance and Control performance of direct current transmission method for power transmission. Among them, the multi-terminal flexible DC transmission method has strong controllability and scalability, and can better adapt to the multi-terminal DC transmission network, and can be applied to the power that incorporates new energy such as wind power, tidal power, and solar power. Therefore, the multi-terminal flexible DC transmission method has gradually become the mainstream of the mainstream power transmission methods. [0003] ...
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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 陈怡静李明刘涛曹润彬李靓婧黄伟煌李志平黄莹许树楷
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD