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pac-based upqc seamless switching power coordination control strategy

A technology of coordinated control and seamless switching, applied in reactive power adjustment/elimination/compensation, reactive power compensation, AC network voltage adjustment, etc. The effect of designing capacity, reducing reactive power burden, improving reliability and utilization

Active Publication Date: 2021-06-11
北京新兴合众科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conventional UPQC control strategy, regardless of the input voltage of the grid, the series compensator does not process reactive power, and the compensation of load reactive power is all undertaken by the shunt compensator. Under normal and stable conditions, UPQC is in an idle state, resulting in Certain capacity and resource waste

Method used

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  • pac-based upqc seamless switching power coordination control strategy
  • pac-based upqc seamless switching power coordination control strategy
  • pac-based upqc seamless switching power coordination control strategy

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Embodiment Construction

[0080] Exemplary embodiments, features, and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0081] A kind of PAC-based UPQC seamless switching power coordination control strategy and UPQC device capacity calculation analysis of the present invention will be described in further detail below in conjunction with the accompanying drawings:

[0082] The content of the present invention comprises the following steps:

[0083] (1) In order to realize the seamless switching of different operating conditions, the most sensitive power angle control is selected under normal and stable voltage operating conditions;

[0084] In normal and stable operation, assuming that the load remains c...

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Abstract

The invention discloses a PAC-based UPQC seamless switching power coordination control strategy, which includes: establishing an UPQC system integrating DC energy storage units; under the stable operation condition of the grid voltage, the invention introduces the most sensitive power angle control in series The compensator outputs reactive power, fully utilizes the design capacity of the device and provides the necessary prerequisite for fast and smooth switching between different operating states; determines the selection method of the most sensitive angle; details the active power and reactive power in the system under different operating conditions Power flow status; establish a simple model of the DC energy storage unit, adopt conventional double-loop control; use complementary PWM control method to control the two-way flow of energy, and coordinate the flow of energy in the control system; Flexible and seamless switching between different operating conditions. The invention improves the utilization rate of the UPQC, significantly reduces the total design capacity of the device, improves the dynamic response speed of the device, and reduces the cost input of the device.

Description

technical field [0001] The invention belongs to the fields of power electronics and power systems, and in particular relates to a PAC-based UPQC seamless switching power coordination control strategy. Background technique [0002] Today, with the rapid development of social economy and the improvement of human living standards, the application penetration rate of sensitive equipment in the power system has increased significantly, and there are more and more sensitive users. At the same time, the proportion of distributed energy grid-connected is also gradually increasing. Higher new requirements are put forward for power quality. As a result, the power quality problem has increasingly become the focus of attention in the power field. Unified power quality conditioner (Unified Power Quality Conditioner, UPQC) is an effective device of the integrated power quality controller that has both the control function of voltage power quality problems related to the power supply side...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16H02J3/18
CPCH02J3/16H02J3/1807H02J3/1821Y02E40/30
Inventor 曲正伟王宝娜王云静孙秀飞侯烁张鸿羽
Owner 北京新兴合众科技有限公司
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