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Current compensation type alternating-current voltage stabilizer

A technology of AC voltage stabilization and current compensation, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as steady-state voltage drop, poor voltage quality, and dynamic voltage drop, so as to suppress voltage imbalance and protect Safe operation and the effect of suppressing inrush current

Active Publication Date: 2010-10-13
TIANJIN WEIHAN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems caused by poor voltage quality such as dynamic voltage drop and steady-state voltage drop in the existing power grid, the present invention proposes a current compensation type AC voltage stabilizing device

Method used

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  • Current compensation type alternating-current voltage stabilizer
  • Current compensation type alternating-current voltage stabilizer
  • Current compensation type alternating-current voltage stabilizer

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment includes an AC switch module 1, an impedance network module 2, a reactive power generation compensation module 3 and a control module 4; the AC switch module 1 is composed of three identical single-phase AC switches 11; the The impedance network module 2 is composed of three identical impedance units 21; the AC switch module 1, the impedance network module 2 and the reactive power generation compensation module 3 are respectively installed on the three-phase power bus between the grid side and the load side Three identical impedance units 21 of the impedance network module 2 are respectively connected in series on the A-phase bus, B-phase bus and C-phase bus of the three-phase power bus; each of the single-phase AC switches 11 is connected to an impedance unit 21 connected in parallel; the reactive power generation compensation module 3 is connected in parallel on the three-phas...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 2 Describe this embodiment, the difference between this embodiment and the specific embodiment is that it also adds a plurality of AC switch modules 1 and a plurality of impedance network modules 2; the structures and installation methods of the plurality of AC switch modules 1 are the same; The structures and installation methods of the plurality of impedance network modules 2 are the same; each of the AC switch modules 1 is composed of three identical single-phase AC switches 11; each of the impedance network modules 2 is composed of three identical impedance unit 21; the plurality of AC switch modules 1 and the plurality of impedance network modules 2 are respectively installed on the three-phase power bus between the grid side and the load side; the three identical impedance network modules 2 of each The impedance units 21 are respectively connected in series on the A-phase bus, B-phase bus and C-phase bus of th...

specific Embodiment approach 3

[0010] Specific embodiment three: the difference between this embodiment and specific embodiment one is that it also increases a plurality of AC switch modules 1, a plurality of impedance network modules 2 and a plurality of reactive power compensation modules 3; the plurality of AC switch modules 1 have the same structure and installation method; the multiple impedance network modules 2 have the same structure and installation method; the multiple reactive power generation compensation modules 3 have the same structure and installation method; each of the AC switch modules 1 is composed of three identical single-phase AC switches 11; each impedance network module 2 is composed of three identical impedance units 21; the multiple AC switch modules 1, multiple impedance network modules 2 and multiple wireless The power generation and compensation modules 3 are respectively installed on the three-phase power bus between the grid side and the load side; the three identical impedanc...

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Abstract

The invention discloses a current compensation type alternating-current voltage stabilizer which relates to an alternating-current voltage stabilizer. The invention aims to solve the problem of poor voltage quality such as dynamic voltage dip, steady-state voltage drop and the like in the traditional power grid. Alternating-current switches, an impedance network and an idle work generation compensation module are respectively arranged on a three-phase power bus between a power grid side and a load side, and three impedance units of the impedance network module are respectively connected with phases A, B and C of a three-phase power bus. Each single-phase alternating-current switch is connected with one impedance unit in parallel; the idle work generation compensation module is connected to the three-phase power bus in parallel; six switching control signal output ends of the control module are connected with six switching control signal input ends of the alternating-current switch; and six idle work generation control signal output ends of the control module are connected with six idle work generation control signal input ends of the idle work generation compensation module. The invention effectively solves problems caused by dynamic voltage dip and steady-state voltage drop in the power grid. The invention can be widely used in occasions with high requirements for voltage quality.

Description

technical field [0001] The invention relates to an AC voltage stabilizing device. Background technique [0002] At present, the dynamic power quality problems in the power grid mainly include voltage sag, voltage surge and instantaneous power interruption. The voltage drop problem has become one of the most serious dynamic power quality problems affecting the normal and safe operation of power equipment. In modern industrial production, the voltage drop causes the manufacturer's product quality to decline, and even leads to the interruption of the production process of the whole factory, resulting in huge economic losses. In new energy power generation, the voltage drop will cause overvoltage, overcurrent and overspeed of the generator set, which will cut off the power plant in a large area, and even lead to the collapse of the power grid in severe cases. [0003] In addition, the steady-state voltage drop problem is also very serious in many large and medium-sized product...

Claims

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Application Information

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IPC IPC(8): G05F1/14
Inventor 谭光慧纪延超
Owner TIANJIN WEIHAN ELECTRIC CO LTD
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