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A Line Power Control Method of Unified Power Flow Controller

A power flow controller and line power technology, applied in AC network circuits, circuit devices, AC networks with the same frequency from different sources, etc., can solve problems such as poor dynamic performance, and achieve good dynamic performance and fast and stable power change process. , the effect of strong reliability

Active Publication Date: 2018-08-07
XJ ELECTRIC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a line power control method of a unified power flow controller to solve the problem of poor dynamic performance of existing control methods

Method used

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  • A Line Power Control Method of Unified Power Flow Controller
  • A Line Power Control Method of Unified Power Flow Controller
  • A Line Power Control Method of Unified Power Flow Controller

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] The invention provides a line power control method of a unified power flow controller, which can realize independent decoupling control of line active power and reactive power, has good dynamic steady-state performance, high reliability, and a simple and easy-to-implement control structure. In the line power control method of the present invention, first, the valve-side current reference value of the series converter is obtained through calculation according to the line power command and the actual line voltage, and the current controller generates the converter output voltage reference value according to the valve-side current reference value.

[0024] figure 2 It is a schematic diagram of the line power control method of the unified power flow controller in the present invention. The line power control method of the unified power flow controller is...

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Abstract

The present invention relates to a unified power flow controller line power control method. A line is provided with an active power instruction, a reactive power instruction and an actually measured line alternating voltage instantaneous value to calculate and obtain a line current reference value in a two-phase static coordinate which is converted to a serial converter valve side current reference value and then combines with an actual feedback valve side current, and through a proportion resonance controller, a calculation result is subjected to transformation of coordinates from the two-phase static coordinate to the three-phase static coordinate to finally obtain the output reference voltage of the converter, the converter outputs corresponding voltage according to the voltage reference value to realize the control of the line power flow. The independent decoupling control of the active power and the reactive power of the line is realized, the power flow control process is stable and rapid with no need for phase lock and other links, the control structure is simple and practical, and the reliability is high.

Description

technical field [0001] The invention belongs to the field of high-voltage alternating current transmission, and in particular relates to a line power control method of a unified power flow controller. Background technique [0002] With the rapid growth of my country's economy, the power system has also developed rapidly. The interconnection of various large-scale power systems and the use of new equipment have made the grid structure more and more complex, and the distribution of power flows between grids is uneven and difficult to control. , some lines have the risk of overload instability. [0003] Flexible Alternative Current Transmission Systems (FACTS) is a new AC transmission technology formed by integrating power electronics technology, communication technology and control technology, which can realize flexible control of the voltage, impedance and phase angle of the transmission system, thereby greatly Improve the regulation flexibility and operation stability of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06
Inventor 刘欣和姚为正吴金龙冯宇鹏李道洋杨美娟王先为孔令凯
Owner XJ ELECTRIC
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