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A Construction Method of Electromagnetic Transient Simulation Model for Large-Scale AC-DC Power System

An electromagnetic transient simulation and power system technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., and can solve the electromagnetic transient model problems that cannot be applied to electromagnetic transient simulation analysis and large-scale AC and DC power systems. There is no one system solution to the problem, etc.

Active Publication Date: 2016-04-06
ZHEJIANG UNIV +3
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Problems solved by technology

[0005] At present, there is no systematic solution to the problem of how to establish an electromagnetic transient model for large-scale AC and DC power systems
At the same time, the traditional dynamic equivalent method under electromechanical transient simulation, such as homogeneous equivalent method, modal equivalent method and estimated dynamic equivalent method based on parameter identification, will form negative Resistive branch, so it is not suitable for electromagnetic transient simulation analysis

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  • A Construction Method of Electromagnetic Transient Simulation Model for Large-Scale AC-DC Power System
  • A Construction Method of Electromagnetic Transient Simulation Model for Large-Scale AC-DC Power System
  • A Construction Method of Electromagnetic Transient Simulation Model for Large-Scale AC-DC Power System

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Embodiment Construction

[0060] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] Taking the planning data of China Southern Power Grid in 2015 as an example, the Southern Power Grid is mainly composed of power grids in Yunnan, Guizhou, Guangxi, Guangdong, and Hainan. Hainan Power Grid is relatively small and independent due to its geographical location. In 2015, China Southern Power Grid contained a total of eight DC transmission lines, forming a large-scale AC-DC hybrid power grid, in which the voltage level of the backbone grid of the AC system is 500kV. Next, according to the data under the electromechanical transient simulation software PSS / E of China Southern Power Grid in 2015, the model of the system under the electromagnetic transient simulation software PSCAD / EMTDC is established. The specific process is as follows fig...

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Abstract

The invention discloses a method for establishing an electromagnetic transient simulation model of a large-scale AC-DC (Alternating Current - Direct Current) power system. At first, an AC-DC power system network is simplified in an electromechanical transient mode by a power system dynamic equivalence method through the utilization of the electromechanical transient simulation data of the large-scale AC-DC power system; secondly, a conversion correspondence principle of an electromechanical transient element model and an electromagnetic transient element model is provided, so that the electromagnetic transient simulation model is established according to the simplified electromechanical transient simulation model of the AC-DC power system. By the adoption of the method provided by the invention, the electromagnetic transient simulation model can be established directly according to the electromechanical transient simulation data of the large-scale AC-DC power system; moreover, the dynamic characteristics of a prototype system are kept; therefore, an AC system and a DC system can be further studied in terms of detailed interaction, multi-direct-current commutation failure characteristics and recovery characteristics after direct current commutation failure.

Description

technical field [0001] The invention belongs to the technical field of power system simulation, and in particular relates to a method for constructing an electromagnetic transient simulation model of a large-scale AC and DC power system. Background technique [0002] With the rapid development of the national economy, in order to provide safe, reliable and abundant power supply, the power system has been continuously improved and upgraded in recent years. In particular, the successive commissioning of UHV AC and UHV DC projects indicates that my country's power system has developed into a system that includes multiple machines (thousands of machines), large power grids (tens of thousands of lines, busbars), AC-DC hybrid transmission and large-scale power grids. The complex power grid with the characteristics of regional interconnection. Usually, for the unstable factors existing in the power grid, it is necessary to study and analyze the power system simulation and propose a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 徐政董桓锋刘昇李晖肖晋宇王智冬王帅
Owner ZHEJIANG UNIV
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