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Four-bridge arm thyristor switch voltage-regulating circuit and voltage-regulating method

A voltage regulation circuit and thyristor technology, which is applied in the direction of AC network voltage adjustment, etc., can solve the problems of less voltage regulation grades, arc generation, and inability to regulate forward and reverse voltages, achieve smooth regulation, improve voltage regulation characteristics, and improve The effect of voltage quality

Inactive Publication Date: 2014-11-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of SVR are: first, it can only adjust the voltage up and down, and cannot adjust the voltage forward and reverse according to the power direction of the power supply at both ends; The head is affected by the arc damage, which affects the service life of the switch and the regulator
The disadvantages of the three-arm TVR are: few voltage regulation grades and poor voltage regulation characteristics

Method used

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  • Four-bridge arm thyristor switch voltage-regulating circuit and voltage-regulating method
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  • Four-bridge arm thyristor switch voltage-regulating circuit and voltage-regulating method

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0028] see figure 1 , discloses a four-arm thyristor voltage regulating circuit according to the present invention, which includes a series transformer 1, an adjustment transformer 2, a four-arm thyristor switch and a control circuit, wherein the series transformer 1 is located at the input side of a high-voltage transmission line, For example, it is located between two-phase voltages connected to high-voltage transmission lines, or between single-phase voltages and ground wires. The adjusting transformer 2 is lo...

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Abstract

A four-bridge arm thyristor switch voltage-regulating circuit and voltage-regulating method. The voltage-regulating circuit includes a series transformer, an adjusting transformer, a four-bridge arm thyristor switch and a control circuit, the adjusting transformer is formed by four independent windings, including a 100V winding, a 300V winding and a 200V winding, wherein the 300V winding is located between the 100V winding and the 200V winding, output voltage of all levels is provided through combination, the four-bridge arm thyristor switch includes eight thyristor switches, a four-bridge arm type switching circuit is formed, each bridge arm is provided with two thyristor switches at upper and lower sides, and a control circuit controls switching-on and switching-off states of each thyristor, thereby realizing voltage regulation. The voltage-regulating circuit and the voltage-regulating method in the invention can provide voltage regulation with a measuring range of + / -600V and a precision of 100V, and of 13 levels in total, and has the characteristics of large voltage regulation measuring range, high precision, fast switching speed, low production cost, long service life and the like.

Description

technical field [0001] This application relates to a graded voltage regulation circuit and a voltage regulation method, in particular, to a four-leg voltage regulation circuit and a voltage regulation method capable of bidirectionally regulating the voltage at the end of a transmission line, which is suitable for 10kV power supply line-to-line A three-phase thyristor voltage regulator for bidirectional regulation and control of voltage. Background technique [0002] Voltage is one of the main indicators of power quality, and unqualified voltage affects the stability and economy of power grid operation. In addition, unqualified voltage endangers the safety of electrical equipment, concerns the vital interests of users and affects the safe operation of the power grid. At present, the graded voltage regulators of 10kV lines used at home and abroad are mechanical switching voltage regulators (SVR) and three-leg thyristor switching voltage regulators (Thyristor Voltage Regulator...

Claims

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Application Information

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IPC IPC(8): H02J3/12
Inventor 刘连光吴伟丽张宏军赵军韩龙艳刘克发
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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