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Developmental Research on The Current-Type SCR Bridge Phase Modifier with Forced Commutation Using a Pulse Transformer

脉冲变压器强制换相电流型可控硅桥调相器的研制

基本信息

批准号：
61550210
负责人：
KAZUNO Hiroshi
金额：
$ 0.7万
依托单位：
Yamanashi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550210/
关键词：
Forced commutation by the pulse-transformer Thyristor bridge phase modifier Pulse voltage for forced commutation Pulse transformer Phase shifted and multiplex system Reduction of higher harmonics DC reactor 直流リアクトルサイリスタ調相装置移相多重遅・進制御

项目摘要

When the bridge rectifier constituted with self quenching devices. derives a leading current from the supply system, there is a question how to treat the conservative energy in the AC side inductance at the instant of commutation. Generally, that energy is absorbed into the sunbber circuit and consumed as loss. But, if the SCR bridge with the forced commutation ability is used, that energy can be treated effectively because of the overlap phenomenon.In order to generate the forced commutation pulse voltage, a single phase bridge constituted with the self quenching devices is used, and the generated pulse voltage is applied to the current-type thyristor bridge via a pulse-transformer. By a method of using the neutral point of the input-transformer, more advantage is brought at the point of view of the needed commutation voltage amplitude, the withstand voltage of device, allowable current of the bridge, and the inductance of the AC side, therfore that bridge will be able to apply easily to the high power system.Using this current-type bridge, the thyristor phase modifier is constituted. As the reduction strategy of the higher harmonics, the phase-shifted multiplex method is employed. Availability of the method in which the phase shifted by 20゜and the triple multiplex, is cirtified. If some ripple in the DC current is admitted, it is possible to select more small inductance of the DC reactor that is an energy storage element. The ratio of the phase modifier capacity (Kvar) to the inherent capacity (Kvar) of such reactor is increased when that DC reactor is used in the phase modifier apparatus. For the smooth movement form "C" action to "L" action and vice versa, every control signal is provided in parallel, and the either of the two is selected by the exchange instructions.Hereafter, the application and improvement of this apparatus will be investigated.

当桥式整流器与自淬熄装置构成时。从供电系统中引出超前电流时，存在如何处理换相瞬间交流侧电感中的保守能量的问题。通常，该能量被吸收到吸收电路中并作为损耗消耗。但是，如果使用具有强制换流能力的可控硅电桥，则由于重叠现象，能量可以被有效地处理。为了产生强制换流脉冲电压，使用由自猝熄装置构成的单相电桥，并且将所产生的脉冲电压经由脉冲变压器施加到电流型可控硅电桥。采用输入变压器中性点的方法，在所需换相电压幅值、器件耐压、桥路允许电流、交流侧电感等方面都有较大的优势，从而使该桥路更容易应用于大功率系统中。作为高次谐波的抑制策略，采用相移复用方法。验证了相移20 μ m和三路复用方法的可行性。如果允许DC电流中的一些涟漪，则可以选择作为能量存储元件的DC电抗器的更小的电感。当DC电抗器用于相修改器设备中时，相修改器容量（Kvar）与这种电抗器的固有容量（Kvar）的比率增加。为了实现从“C”动作到“L”动作以及从“L”动作到“C”动作的平稳运动，各控制信号并行提供，并通过交换指令选择两者之一。