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VSC-based UPFC electromechanical transient modular modeling method

A modeling method and modular technology, applied in the field of power system, which can solve problems such as inappropriate electromechanical transient modeling

Active Publication Date: 2016-08-24
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] Most of the above modeling methods are used in modeling on EMTDC / EMTP or Matlab, corresponding to the electromagnetic transient model of UPFC, which is not suitable for modeling of electromechanical transient

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  • VSC-based UPFC electromechanical transient modular modeling method
  • VSC-based UPFC electromechanical transient modular modeling method
  • VSC-based UPFC electromechanical transient modular modeling method

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Embodiment Construction

[0050] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] The general idea of ​​the technical scheme of the UPFC electromechanical transient modular modeling method based on VSC (Voltage Source Converter) is as follows: starting from the basic principle of UPFC based on VSC, the two-level, three-level, MMC, etc. VSCs with different topological structures are unified into an equivalent commutation circuit, and UPFC is divided into four parts: series module, parallel module, DC module and control module. According to different series-parallel combinations, the calculation sequence of each module of UPFC is determined , each module is solved in turn, and finally the UPFC part and the network equation are solved alternately. The implementation steps of the scheme are as follows:

[0052] Step 1: Starting from the basic principles of VSC-based UPFC, first unify VSCs with different topolo...

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Abstract

The invention provides a VSC-based UPFC electromechanical transient modular modeling method. The method includes the steps of (1) unifying VSCs of different topological structures into the same equivalent commutation circuit; (2) dividing a UPFC into a series module, a parallel module, a DC module and a control module; (3) according to different series and parallel combination modes, determining the sequence of calculation of the modules of the UPFC and calculating sequentially; and (4) alternatively solving for the UPFC part and a network equation. The invention divides the UPFC into the series module, the parallel module, the DC module and the control module which can be freely combined, therefore has a very high flexibility, and can be adapted to a variety of UPFC power grid accessing modes and using scenarios.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a VSC-based UPFC electromechanical transient modular modeling method. Background technique [0002] UPFC (Unified Power Flow Controller, Unified Power Flow Controller) is the most versatile FACTS device so far. By changing the control law, different functions such as parallel compensation, series compensation and shifting can be realized separately or simultaneously. UPFC can be regarded as a static synchronous compensator device (STATCOM) and a static synchronous series compensator device (SSSC) connected in parallel on the DC side, which can simultaneously and quickly and independently control the active power and reactive power in the transmission line Power, so that UPFC has a four-quadrant operation function that STATCOM (Static Synchronous Compensator, static synchronous compensator device), SSSC (Static Series Synchronous Compensator, static series compensator device), phase s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCH02J3/1814H02J3/1821H02J2203/20Y02E40/10
Inventor 董毅峰侯俊贤李海峰王毅邹燕刘林王虹富孙大雁万磊王铁柱
Owner CHINA ELECTRIC POWER RES INST
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