An Electromagnetic Transient Simulation Method for Generator Sets with Fast and Smooth Start

An electromagnetic transient simulation and generator set technology, applied in design optimization/simulation, electrical digital data processing, instruments, etc., can solve problems such as inconvenient initialization and lack of cross-platform use ability, so as to avoid tediousness and overcome startup difficulties , The effect of overcoming technical bottlenecks

Active Publication Date: 2019-02-26
ZHEJIANG UNIV
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Problems solved by technology

[0004] An existing method to solve the lack of types of software models is to use the graphical transfer function provided by the software to build, but this method of model definition is inconvenient to initialize and the defined model is limited to use in a certain simulation software, and does not have the ability to use cross-platform

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  • An Electromagnetic Transient Simulation Method for Generator Sets with Fast and Smooth Start
  • An Electromagnetic Transient Simulation Method for Generator Sets with Fast and Smooth Start
  • An Electromagnetic Transient Simulation Method for Generator Sets with Fast and Smooth Start

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Embodiment Construction

[0038] 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.

[0039] The method of the invention expresses the unit model as a state space expression, and then uses programming language to define it. During the actual simulation calculation, the process is divided into three stages, and different components in the unit model are determined step by step for initialization or numerical integration.

[0040]The generator set model definition includes the following two links in the present invention:

[0041] First, the block diagram of the transfer function of each component of the unit model is expanded into a state space expression in the time domain, that is, the expression is expressed in the following form:

[0042]

[0043] Among them: x is the state variable matrix, u is the component input variable matrix, y...

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Abstract

The invention discloses an electromagnetic transient simulation method for a generator unit capable of rapid smooth starting. With the adoption of the simulation method disclosed by the invention, a unit model completely identical with that in BPA stability calculation can be written by Fortran; the model can be rapidly started and is consistent with that in stable-state calculation after starting, so that the technical defect of difficult unit starting in existing electromagnetic transient simulation is solved; a model definition mode based on a programming language is not limited by simulation software and can be used across a software platform, so that the repetitive works and the cumbersomeness of model definition in a graphical form are avoided; therefore, the electromagnetic transient simulation method disclosed by the invention has important significance in power system planning and electromagnetic transient simulation at the operation stage.

Description

technical field [0001] The invention belongs to the technical field of electric power system simulation, and in particular relates to an electromagnetic transient simulation method for a fast and smooth start-up generating set. Background technique [0002] The future power system will contain a large number of new energy sources using power electronic converter interfaces, coupled with the already existing DC transmission and flexible AC transmission systems, making the power system include a considerable number of power electronic devices in addition to traditional electromagnetic components , this kind of system is called the AC / DC hybrid power system (Hybrid AC / DC power system). In the AC-DC hybrid power system, the electromechanical transient simulation program is generally used to analyze the safety and stability of the system under the condition of symmetrical faults of the AC system or blockage of the DC system. Since the electromechanical transient analysis program...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 徐政陆韶琦董桓锋
Owner ZHEJIANG UNIV
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