Multi-time-scale mathematical model establishing method of distributed power flow controller

A power flow controller, multi-time scale technology, applied in AC network circuits, power transmission AC networks, AC networks with the same frequency from different sources, etc. question

Active Publication Date: 2017-08-22
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] At present, the research on the mathematical model of the distributed power flow controller is mainly focused on the modeling of the equivalent power source method, and the whole system is equivalent to a

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  • Multi-time-scale mathematical model establishing method of distributed power flow controller
  • Multi-time-scale mathematical model establishing method of distributed power flow controller
  • Multi-time-scale mathematical model establishing method of distributed power flow controller

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[0077] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0078] see figure 1 As shown, the distributed power flow controller multi-time scale mathematical model establishment method described in the present invention is based on figure 2 The shown distributed power flow controller and the internal transmission network channels of different frequencies of active power, the mathematical model establishment method includes the following steps:

[0079] Step S1: Consider the parallel side device of the distributed power flow controller as a group of back-to-back connected converters, including the three-phase converter VSC1 on the parallel side, the single-phase converter VSC2 on the parallel harmonic side, and the common DC capacitor C on the parallel side sh Three-part equivalent circuit, image 3 Represents the equivalent circuit of the three-phase converter VSC1 on the parallel side of the distributed po...

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Abstract

The invention relates to a multi-time-scale mathematical model establishing method of a distributed power flow controller. The method comprises: S1, a parallel-side apparatus of a distributed power flow controller is used as one converter groups including a parallel grid-side three-phase converter equivalent circuit, a parallel harmonic-side single-phase converter equivalent circuit, and a parallel-side common direct-current capacitor equivalent circuit in back-to-back connection; S2, a series-side apparatus of the distributed power flow controller is used as one applied to an alternating-current fundamental wave network equivalent circuit, an alternating-current third harmonic network equivalent circuit, and a series-side direct-current capacitor equivalent circuit simultaneously; S3, according to the principle of a voltage type PWM converter switch cycle average model, a dynamic mathematical model of the distributed power flow controller is established; and S4, a multi-time-scale analysis is carried out on the dynamic mathematical model of the distributed power flow controller by combining a singular perturbation principle and a multi-time-scale mathematical model of the distributed power flow controller is established. Therefore, the multi-time-scale characteristic of the whole power system can be analyzed well. The method is suitable for the order reduction analysis of the power system.

Description

technical field [0001] The invention relates to the technical field of flexible alternating current transmission, in particular to a method for establishing a multi-time scale mathematical model of a distributed power flow controller. Background technique [0002] In the next period of time, my country's energy consumption will enter a normal process of low-to-medium growth, and the level of power supply and demand will be further relaxed. Reasonably planning the supply and demand, and meeting the power supply in a more economical and efficient manner have become issues that need to be studied in depth. Flexible AC transmission technology (FACTS, Flexible AC Transmission System) uses power electronic conversion components and their control devices to control power transmission capabilities, and realizes power transmission in the form of a combination of device control and system central commands without changing the line topology. Real-time control of system operating indic...

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Application Information

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IPC IPC(8): H02J3/06H02J3/36
CPCH02J3/06H02J3/36H02J2003/365H02J2203/20Y02E60/60
Inventor 唐爱红熊杰邵云露舒欣高梦露王冲郑蒙金英雷
Owner WUHAN UNIV OF TECH
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