A Simulation Model of HVDC Transmission System
A technology of power transmission system and simulation model, which is applied in the direction of AC network circuit, circuit device, power transmission AC network, etc., which can solve the problems of complex circuit and slow simulation speed, and achieve simplification of simulation model, improvement of simulation speed, and omission of high-frequency components Effect
Active Publication Date: 2022-06-28
国家电网有限公司华北分部 +2
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Problems solved by technology
The circuit of the simulation model is complex, there is direct circuit coupling between the AC grid and the DC grid, and the simulation speed is slow
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] figure 1 It is the structure diagram of the actual HVDC transmission circuit of the embodiment of the simulation model of the HVDC transmission system of the present invention.
[0023] see figure 1 , the...
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The invention discloses a simulation model of a high-voltage direct current transmission system. The simulation model includes: a rectification-side three-phase AC grid model for simulating a rectification-side three-phase AC grid, an inverter-side three-phase AC grid model for simulating an inverter-side three-phase AC grid, and a model for simulating a DC transmission line. DC transmission line model, first current source and first voltage source for simulating a rectifier converter, second current source and second voltage source for simulating an inverse converter; first current source and second current source They are all three, the first current source is connected to the three-phase AC grid model on the rectification side, and the three first current sources are star-connected, the second current source is connected to the three-phase AC grid model on the inverter side, and the three The second current source is connected in star form; the first voltage source is connected in parallel on the rectification side of the DC transmission line model, and the second voltage source is connected in parallel on the inverter side of the DC transmission line model. The simulation model of the invention can improve the simulation speed while simplifying the simulation model.
Description
technical field [0001] The invention relates to the technical field of power system modeling and simulation, in particular to a high-voltage direct current transmission system simulation model. Background technique [0002] HVDC transmission is widely used in high-voltage and large-capacity long-distance power transmission and asynchronous AC power grid interconnection and other occasions. In order to make HVDC transmission run more stably, it is necessary to model and simulate the performance of HVDC transmission system at the beginning of HVDC system design. The existing modeling method is to establish a simulation model of a bridge rectifier or inverter circuit composed of thyristors according to the principle of high-voltage direct current transmission. The circuit of the simulation model is complex, there is direct circuit coupling between the AC grid and the DC grid, and the simulation speed is slow. Contents of the invention [0003] The purpose of the present inv...
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IPC IPC(8): H02J3/36H02J3/24
CPCH02J3/24H02J3/36H02J2203/20Y02E60/60
Inventor 董晓亮田旭孙梦雅
Owner 国家电网有限公司华北分部