Separate Vector Modulation Method for Battery Charge and Discharge Single-phase High Frequency Chain Matrix Converter
A matrix converter and matrix converter technology, applied in battery load switching, battery circuit devices, current collectors, etc., can solve problems such as affecting the popularization and application of converters, complex modulation and control of matrix converters, and reduced system reliability.
Active Publication Date: 2019-02-01
秦皇岛美城润麒自控设备有限公司
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[0004] However, although the above-mentioned commutation strategy can achieve safe commutation, it causes the modulation and control of the matrix converter to be more complicated, which leads to the reduction of system reliability and affects the popularization and application of this type of converter.
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[0034] The present invention will be further described below in conjunction with accompanying drawing:
[0035] like figure 1 Shown is the topological structure diagram of the method of the present invention, the single-phase high-frequency chain matrix converter topology used in the modulation method is formed by the AC input voltage U s , LC input filter, pre-matrix converter, high-frequency transformer, post-matrix converter, L-type filter, load resistor R dc It is connected with the storage battery E in sequence;
[0036] The front-stage matrix converter is composed of a first controllable switch tube S p1 , the second controllable switch tube S p2 , the third controllable switch tube S p3 , the fourth controllable switch tube S p4 , the fifth controllable switch tube S n1 , the sixth controllable switch tube S n2 , the seventh controllable switch tube S n3 and the eighth controllable switch tube S n4 Composition; the first controllable switch tube S p1 The emitt...
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A single-phase high-frequency chain matrix converter battery charging and discharging modulation method, the content of which is: when charging the battery, the control of the front-end converter is to first use SVPWM control, perform space vector modulation to output four driving waves, and pass through the detection transformer The conditional judgment of "AND" logic is performed after the positive and negative of the primary side current to form eight-way drive wave separation to drive eight controllable switch tubes. In the post-transformer matrix converter, Sp is all on and Sn is all off, which is equivalent to uncontrollable diodes for rectification. According to different switch states, idc charges the load and battery through different uncontrollable diodes. When discharging, the rear matrix Converter Sp is fully off, Sn performs traditional modulation during inversion, and energy flows from the battery to the AC side. The method of the invention can realize charging by controlling the on-off of the switch tube at any time, and then realize the bidirectional flow of energy.
Description
technical field [0001] The invention relates to the field of modulation and control of power electronic matrix converters, in particular to a separate vector modulation method for charging and discharging single-phase high-frequency chain matrix converters of accumulators. Background technique [0002] At present, research on battery charging and discharging devices is mainly focused on three-phase systems and DC systems, including three-phase PWM rectifier battery charging and discharging devices, three-phase bidirectional DC-DC converter charging and discharging devices, and bidirectional DC systems suitable for use in DC systems. -DC charging and discharging devices, etc. However, there are few studies on bidirectional charging and discharging devices using high-frequency chain matrix converters. Compared with the traditional converter, the matrix converter has no intermediate energy storage link, compact structure, small size and high efficiency. It adopts bidirectional ...
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IPC IPC(8): H02M7/797H02J7/02H02J7/00
CPCH02J7/022H02J7/00H02J7/0068H02M7/797H02J2207/20H02M1/0067
Inventor 马巨海李春蕾赵丁选闫朝阳梁晨阳
Owner 秦皇岛美城润麒自控设备有限公司