SVG power unit circuit, chained SVG power unit circuit and static voltage equalization method
A power unit and circuit technology, applied in reactive power adjustment/elimination/compensation, flexible AC transmission systems, etc., can solve the problems of unbalanced unit voltage, high voltage level, uncontrollable discharge power, etc., to achieve constant discharge power, The effect of voltage equalization
Active Publication Date: 2016-02-03
SHENZHEN INVT ELECTRIC
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In view of this, the present invention provides an SVG power unit circuit, a chained SVG power unit circuit and a static voltage equalization method to overcome the problem in the standby state caused by the high level of bus voltage discharge current and uncontrollable discharge power in the prior art. The lower power unit cannot work normally, and the voltage between the units is unbalanced
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] The invention discloses a SVG power unit circuit, which includes: an electrically connected H-bridge inverter circuit, a power support capacitor Cs, a voltage equalizing resistor Rs, a DC / DC circuit, a discharge circuit and a control board. The discharge circuit includes a discharge power switch S and a discharge resistor R connected in series, the discharge circuit is connected in parallel to the low-voltage side of the DC / DC circuit, and the control bo...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an SVG (Static Var Generator) power unit circuit which comprises an H bridge inverter circuit, a power support capacitor Cs, a voltage-sharing resistor Rs, a DC / DC circuit, a discharging circuit and a control panel which are electrically connected, wherein the discharging circuit comprises a discharge power switch S and a discharge resistor R which are connected with each other in series; the discharging circuit is connected in parallel with the low-voltage side of the DC / DC circuit; the control panel is used for turning on and turning off the discharge power switch S so as to realize electric discharge of a busbar voltage; the discharge power of the discharging circuit is constant; the requirement for controllability of electric discharge is met. In addition, the invention further discloses a chained SVG power unit circuit and a static voltage-sharing method; the upper limit value and the lower limit value of a busbar discharge voltage are calculated through detecting voltage values of each unit, whether the electric discharge is performed or not by judging an effective operating power unit busbar value and the upper limit value and the lower limit value of the discharge voltage, the normal operation of the power unit in a standby mode is guaranteed by adjusting the voltage value, and voltage balance between the units is achieved.
Description
technical field [0001] The present invention relates to the technical field of power electronics, and more specifically, relates to an SVG power unit circuit, a chained SVG power unit circuit and a static voltage equalization method. Background technique [0002] With the development of power electronics technology, in the power electronics industry, the traditional dynamic var compensation (SVC) device is gradually replaced by the static var generator SVG in the field of reactive power compensation. Due to the limitation of power electronic switching devices, parallel Type SVG is often used in reactive power compensation occasions of low-voltage power supply systems. For medium- and high-voltage large-capacity reactive power compensation occasions, the mainstream SVG main circuit in the prior art is composed of a chain structure based on H-bridge units, which has a high degree of modularization and control Convenient and easy to maintain, figure 1 and figure 2 They are t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 凡念
Owner SHENZHEN INVT ELECTRIC