CN216252557U - Rectifier module and high-voltage direct-current power supply system - Google Patents
Rectifier module and high-voltage direct-current power supply system Download PDFInfo
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- CN216252557U CN216252557U CN202122672379.9U CN202122672379U CN216252557U CN 216252557 U CN216252557 U CN 216252557U CN 202122672379 U CN202122672379 U CN 202122672379U CN 216252557 U CN216252557 U CN 216252557U
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Abstract
The utility model discloses a rectifier module and a high-voltage direct-current power supply system, wherein the rectifier module comprises an inductance component, a switch component, a rectifier component and a capacitance component which form a three-phase bridgeless BOOST-BUCK topology connected with a phase-shifting transformer; the inductance assembly comprises a first inductance, a second inductance, a third inductance and a fourth inductance; the switch assembly comprises a first switch, a second switch, a third switch and a fourth switch; the rectifying component comprises a first rectifying element, a second rectifying element, a third rectifying element and a fourth rectifying element; the capacitive component includes a first capacitance and a second capacitance. According to the utility model, through the three-phase bridgeless BOOST-BUCK and the phase-shifting transformer, functions of PFC, rectification, voltage boosting and reducing and the like can be realized, and efficiency and power density can be obviously improved, so that the requirement of power grid development is met, and the three-phase bridgeless BOOST-BUCK converter is simple in topology, low in control complexity, high in reliability and suitable for large-scale popularization and application.
Description
Technical Field
The utility model relates to the technical field of high-voltage direct-current power transmission, in particular to a rectification module and a high-voltage direct-current power supply system.
Background
As is well known, the transmission and distribution mode of the modern society is mainly ac transmission and distribution, but the ac transmission and distribution has limitations in many aspects due to the high quality requirement of the ac power and the consideration of frequency, power factor, harmonic, capacitance-to-ground current, line impedance, synchronous processing, and the like. Meanwhile, the direct current power transmission and distribution technology avoids the problems of alternating current which need to be considered due to the unique characteristics of the direct current power transmission and distribution technology, so that the direct current power transmission and distribution, particularly the high-voltage direct current power transmission and distribution, is widely concerned and applied, has wide market requirements, and can play a great role in the current and even future power grids.
At present, the topology of a traditional high-voltage direct-current Power supply system usually adopts a traditional transformer + a PFC (Power Factor Correction) circuit + an LLC resonant circuit, and although the topology can realize functions of PFC, rectification, voltage step-up and step-down, etc., the existing problems are also very obvious, that is, the efficiency is low, and the requirement of Power grid development cannot be met.
Therefore, there is a need for improvements in the prior art.
The above information is given as background information only to aid in understanding the present disclosure, and no determination or admission is made as to whether any of the above is available as prior art against the present disclosure.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rectifier module and a high-voltage direct-current power supply system, which are used for solving the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a rectifier module, which includes an inductor component, a switch component, a rectifier component, and a capacitor component; wherein the content of the first and second substances,
the inductor assembly comprises a first inductor L1, a second inductor L2, a third inductor L3 and a fourth inductor L4;
the switch assembly includes a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4;
the rectifying assembly comprises a first rectifying element D1, a second rectifying element D2, a third rectifying element D3 and a fourth rectifying element D4;
the capacitive assembly comprises a first capacitance C1 and a second capacitance C2;
the reverse ends of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 are connected in parallel and then connected to one end of the fourth switch S4, the forward end of the first rectifying element D1 is connected to one end of the first switch S1, the forward end of the second rectifying element D2 is connected to one end of the second switch S2, the forward end of the third rectifying element D3 is connected to one end of the third switch S3, and the other ends of the first switch S1, the second switch S2 and the third switch S3 are connected in parallel and then connected to a load;
one end of each of the first inductor L1, the second inductor L2, and the third inductor L3 is connected to one of three-phase windings in the phase-shifting transformer, the other end of the first inductor L1 is connected between the first switch S1 and the first rectifying element D1, the other end of the second inductor L2 is connected between the second switch S2 and the second rectifying element D2, and the other end of the third inductor L3 is connected between the third switch S3 and the third rectifying element D3;
the other end of the fourth switch S4 is connected in series with the fourth inductor L4 and then connected to the load;
a forward terminal of the fourth rectifying element D4 is connected between the load and one of the parallel terminals of the first switch S1, the second switch S2, and the third switch S3, and a reverse terminal of the fourth rectifying element D4 is connected between the fourth switch S4 and the fourth inductor L4;
one end of the first capacitor C1 is connected between the fourth switch S4 and one end of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 connected in parallel, and the other end of the first capacitor C1 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 connected in parallel;
one end of the second capacitor C2 is connected between the fourth inductor L4 and the load, and the other end of the second capacitor C2 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel.
Further, in the rectifying module, the rectifying assembly further includes a fifth rectifying element D5, a sixth rectifying element D6, and a seventh rectifying element D7;
the reverse end of the fifth rectifying element D5 is connected between the first inductor L1 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the sixth rectifying element D6 is connected between the second inductor L2 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the seventh rectifying element D7 is connected between the third inductor L3 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2, and the third switch S3, which are connected in parallel.
Further, in the rectifier module, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are all switching tubes.
Further, in the rectification module, the switching tube is an MOS tube or an audion.
In the rectifier module, the first rectifier device D1, the second rectifier device D2, the third rectifier device D3, the fifth rectifier device D5, the sixth rectifier device D6, and the seventh rectifier device D7 are all diodes or MOS transistors.
Further, in the rectifier module, the fourth rectifier device D4 is a diode.
In a second aspect, an embodiment of the present invention provides a high voltage dc power supply system, which includes a high voltage incoming line cabinet, an isolation transformer cabinet, a rectifier cabinet, and a dc power distribution cabinet, which are connected in sequence;
the high-voltage incoming cabinet is used for connecting high-voltage mains supply to the isolation transformer cabinet;
the isolation transformer cabinet comprises a phase-shifting transformer provided with a plurality of three-phase windings and is used for regulating the voltage of high-voltage commercial power;
the rectifier cabinet comprises a rectifying plug frame and a plurality of rectifying modules arranged on the rectifying plug frame and is used for rectifying the voltage-regulated high-voltage commercial power;
the direct current power distribution cabinet is used for outputting rectified high-voltage commercial power to a load;
wherein the rectifier module is as described above in the first aspect.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects:
according to the rectification module and the high-voltage direct-current power supply system provided by the embodiment of the utility model, functions such as PFC, rectification, voltage boosting and reducing can be realized through the three-phase bridgeless BOOST-BUCK and the phase-shifting transformer, and the efficiency and the power density can be obviously improved, so that the requirement of power grid development is met, and the rectification module and the high-voltage direct-current power supply system are simple in topology, low in control complexity and high in reliability, and are suitable for large-scale popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a rectifier module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a wave generation manner of the first switch S1, the second switch S2, and the third switch S3 according to the first embodiment of the utility model;
fig. 3 is a schematic diagram of a control logic of a rectifier module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a rectifier module according to an embodiment of the present invention;
FIG. 5 is a schematic waveform diagram of a conventional three-phase bridgeless BOOST-BUCK according to an embodiment of the present invention;
FIG. 6 is a schematic waveform diagram of an improved three-phase bridgeless BOOST-BUCK according to an embodiment of the present invention;
fig. 7 is a high-voltage direct-current power supply system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Example one
In view of the above-mentioned defects of the existing high-voltage direct-current power supply technology, the applicant of the present invention is based on practical experience and professional knowledge that are rich in years of design and manufacture in the industry, and is actively researched and innovated in cooperation with the application of theory, so as to hopefully create a technology capable of solving the defects in the prior art, and make the high-voltage direct-current power supply technology more practical. After continuous research and design and repeated trial production and improvement, the utility model with practical value is finally created.
Referring to fig. 1, an embodiment of the utility model provides a rectifier module, which includes an inductor component, a switch component, a rectifier component, and a capacitor component; wherein the content of the first and second substances,
the inductor assembly comprises a first inductor L1, a second inductor L2, a third inductor L3 and a fourth inductor L4;
the switch assembly includes a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4;
the rectifying assembly comprises a first rectifying element D1, a second rectifying element D2, a third rectifying element D3 and a fourth rectifying element D4;
the capacitive assembly comprises a first capacitance C1 and a second capacitance C2;
the reverse ends of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 are connected in parallel and then connected to one end of the fourth switch S4, the forward end of the first rectifying element D1 is connected to one end of the first switch S1, the forward end of the second rectifying element D2 is connected to one end of the second switch S2, the forward end of the third rectifying element D3 is connected to one end of the third switch S3, and the other ends of the first switch S1, the second switch S2 and the third switch S3 are connected in parallel and then connected to a load;
one end of each of the first inductor L1, the second inductor L2, and the third inductor L3 is connected to one of three-phase windings in the phase-shifting transformer, the other end of the first inductor L1 is connected between the first switch S1 and the first rectifying element D1, the other end of the second inductor L2 is connected between the second switch S2 and the second rectifying element D2, and the other end of the third inductor L3 is connected between the third switch S3 and the third rectifying element D3;
the other end of the fourth switch S4 is connected in series with the fourth inductor L4 and then connected to the load;
a forward terminal of the fourth rectifying element D4 is connected between the load and one of the parallel terminals of the first switch S1, the second switch S2, and the third switch S3, and a reverse terminal of the fourth rectifying element D4 is connected between the fourth switch S4 and the fourth inductor L4;
one end of the first capacitor C1 is connected between the fourth switch S4 and one end of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 connected in parallel, and the other end of the first capacitor C1 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 connected in parallel;
one end of the second capacitor C2 is connected between the fourth inductor L4 and the load, and the other end of the second capacitor C2 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel.
It should be noted that, in this embodiment, by designing the three-phase bridgeless BOOST-BUCK and the phase-shifting transformer, functions such as PFC, rectification, voltage step-up and step-down can be realized as in the prior art, but efficiency and power density can be obviously improved.
Specifically, as shown in fig. 2, the first switch S1, the second switch S2, and the third switch S3 are configured to generate waves, and three-phase input voltages are compared in real time, and a switch corresponding to a phase with the highest input voltage is switched on at a high frequency, and the other two switches are switched off, so that a switch that is driven at an input voltage phase inversion point is also switched on. Both the bridgeless BOOST circuit and the BUCK circuit adopt double-loop control, and then a three-phase bridgeless BOOST loop is described in detail, as shown in fig. 3, an outer loop is a voltage loop, bus voltage is subjected to error amplification, the output of the voltage loop is given as a current loop, an inner loop is a current loop, three-phase input voltage is compared in real time, a switch corresponding to one phase with the highest input voltage is subjected to high-frequency switching, the current of the switch is controlled by the inner loop, and other two switches are turned off.
In this embodiment, the three-phase bridgeless BOOST-BUCK as described above is a normal three-phase bridgeless BOOST-BUCK, and an improved three-phase bridgeless BOOST-BUCK can be obtained by improving the normal three-phase bridgeless BOOST-BUCK, as shown in fig. 4, specifically, some elements need to be added for matching in the improvement, that is, the rectifying elements further include a fifth rectifying element D5, a sixth rectifying element D6 and a seventh rectifying element D7;
the reverse end of the fifth rectifying element D5 is connected between the first inductor L1 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the sixth rectifying element D6 is connected between the second inductor L2 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the seventh rectifying element D7 is connected between the third inductor L3 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2, and the third switch S3, which are connected in parallel.
In the present embodiment, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are all switching tubes.
Preferably, the switching tube is an MOS tube or a triode.
In this embodiment, the first rectifying element D1, the second rectifying element D2, the third rectifying element D3, the fifth rectifying element D5, the sixth rectifying element D6 and the seventh rectifying element D7 are all diodes or MOS transistors.
The fourth rectifying element D4 is a diode.
Next, a detailed operation principle of the general three-phase bridgeless BOOST-BUCK and the improved three-phase bridgeless BOOST-BUCK will be described.
Common three-phase bridgeless BOOST-BUCK:
the waveform of this topology is shown in fig. 5, t 0-t 1: when the first switch S1 is turned on, a current flows through the first inductor L1, the anti-parallel diode of the first switch S1 and the second switch S2, and the second inductor L2, at this time, the first inductor L1 and the second inductor L2 store energy, the current rises, when the first switch S1 is turned off, the current flows through the first inductor L1, the first rectifying element D1, the first capacitor C1, the anti-parallel diode of the second switch S2, and the second inductor L2, at this time, the first inductor L1 and the second inductor L2 release energy, and the current drops; t 1-t 2: when the first switch S1 is turned on, a current flows through the first inductor L1, the anti-parallel diode of the first switch S3, and the third inductor L3, at which time the first inductor L1 and the third inductor L3 store energy, and the current rises, and when the first switch S1 is turned off, the current flows through the first inductor L1, the first rectifying element D1, the first capacitor C1, the anti-parallel diode of the third switch S3, and the third inductor L3, at which time the first inductor L1 and the third inductor L3 release energy, and the current falls; the input current of the three-phase bridgeless BOOST is non-sine wave, but the current is sine at the 10KV side because of the harmonic cancellation of the phase-shifting transformer, and the PF value can reach more than 0.99; the first rectifying element D1, the second rectifying element D2, and the third rectifying element D3 can achieve synchronous rectification if MOS transistors are used, and the basic operation principle is the same as described above.
Improved three-phase bridgeless BOOST-BUCK:
the waveform of this topology is shown in fig. 6, t 0-t 1: when the first switch S1 is turned on, a current flows through the first inductor L1, the first switch S1 and the sixth rectifying element D6, at this time, the first inductor L1 stores energy, the current rises, when the first switch S1 is turned off, the current flows through the first inductor L1, the first rectifying element D1, the first capacitor C1 and the sixth rectifying element D6, at this time, the inductor first inductor L1 releases energy, and the current falls; t 1-t 2: when the first switch S1 is turned on, a current flows through the first inductor L1, the first switch S1 and the seventh rectifying element D7, at this time, the first inductor L1 stores energy, the current rises, when the first switch S1 is turned off, the current flows through the first inductor L1, the first rectifying element D1, the first capacitor C1 and the seventh rectifying element D7, at this time, the inductor first inductor L1 releases energy, and the current falls; the input current of the three-phase bridgeless BOOST is non-sine wave, but the current is sine at the 10KV side because of the harmonic cancellation of the phase-shifting transformer, and the PF value can reach more than 0.99; the basic operation principle is the same as that described above if synchronous rectification is realized by using MOS transistors in the first rectifying element D1, the second rectifying element D2, the third rectifying element D3, the fifth rectifying element D5, the sixth rectifying element D6, and the seventh rectifying element D7.
According to the rectifying module provided by the embodiment of the utility model, functions such as PFC, rectification, voltage boosting and reducing can be realized through the three-phase bridgeless BOOST-BUCK and the phase-shifting transformer, and the efficiency and the power density can be obviously improved, so that the requirement of power grid development is met, and the rectifying module has the advantages of simple topology, low control complexity and high reliability, and is suitable for large-scale popularization and application.
Example two
Referring to fig. 7, an embodiment of the utility model provides a high-voltage dc power supply system, which includes a high-voltage incoming line cabinet, an isolation transformer cabinet, a rectifier cabinet and a dc power distribution cabinet, which are connected in sequence;
the high-voltage incoming cabinet is used for connecting high-voltage mains supply to the isolation transformer cabinet;
the isolation transformer cabinet comprises a phase-shifting transformer provided with a plurality of three-phase windings and is used for regulating the voltage of high-voltage commercial power;
the rectifier cabinet comprises a rectifying plug frame and a plurality of rectifying modules arranged on the rectifying plug frame and is used for rectifying the voltage-regulated high-voltage commercial power;
the direct current power distribution cabinet is used for outputting rectified high-voltage commercial power to a load;
the rectifier module is the rectifier module according to the first embodiment.
It should be noted that, because the phase-shifting transformer has a function of canceling out higher harmonics, the PFC function of the system is realized by the phase-shifting transformer, the rectifier module may not have the PFC function, and the input stage hardware and software may be simplified.
According to the high-voltage direct-current power supply system provided by the embodiment of the utility model, functions such as PFC, rectification, voltage boosting and reducing can be realized through the three-phase bridgeless BOOST-BUCK and the phase-shifting transformer, and the efficiency and the power density can be obviously improved, so that the requirement of power grid development is met, and the high-voltage direct-current power supply system is simple in topology, low in control complexity, high in reliability and suitable for large-scale popularization and application.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
Claims (7)
1. A rectification module is characterized by comprising an inductance assembly, a switch assembly, a rectification assembly and a capacitance assembly; wherein the content of the first and second substances,
the inductor assembly comprises a first inductor L1, a second inductor L2, a third inductor L3 and a fourth inductor L4;
the switch assembly includes a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4;
the rectifying assembly comprises a first rectifying element D1, a second rectifying element D2, a third rectifying element D3 and a fourth rectifying element D4;
the capacitive assembly comprises a first capacitance C1 and a second capacitance C2;
the reverse ends of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 are connected in parallel and then connected to one end of the fourth switch S4, the forward end of the first rectifying element D1 is connected to one end of the first switch S1, the forward end of the second rectifying element D2 is connected to one end of the second switch S2, the forward end of the third rectifying element D3 is connected to one end of the third switch S3, and the other ends of the first switch S1, the second switch S2 and the third switch S3 are connected in parallel and then connected to a load;
one end of each of the first inductor L1, the second inductor L2, and the third inductor L3 is connected to one of three-phase windings in the phase-shifting transformer, the other end of the first inductor L1 is connected between the first switch S1 and the first rectifying element D1, the other end of the second inductor L2 is connected between the second switch S2 and the second rectifying element D2, and the other end of the third inductor L3 is connected between the third switch S3 and the third rectifying element D3;
the other end of the fourth switch S4 is connected in series with the fourth inductor L4 and then connected to the load;
a forward terminal of the fourth rectifying element D4 is connected between the load and one of the parallel terminals of the first switch S1, the second switch S2, and the third switch S3, and a reverse terminal of the fourth rectifying element D4 is connected between the fourth switch S4 and the fourth inductor L4;
one end of the first capacitor C1 is connected between the fourth switch S4 and one end of the first rectifying element D1, the second rectifying element D2 and the third rectifying element D3 connected in parallel, and the other end of the first capacitor C1 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 connected in parallel;
one end of the second capacitor C2 is connected between the fourth inductor L4 and the load, and the other end of the second capacitor C2 is connected between the load and one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel.
2. The rectifier module of claim 1, wherein the rectifier assembly further includes a fifth rectifier element D5, a sixth rectifier element D6, and a seventh rectifier element D7;
the reverse end of the fifth rectifying element D5 is connected between the first inductor L1 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the sixth rectifying element D6 is connected between the second inductor L2 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2 and the third switch S3 which are connected in parallel;
the reverse end of the seventh rectifying element D7 is connected between the third inductor L3 and the phase-shifting transformer, and the forward end of the fifth rectifying element D5 is connected to one end of the first switch S1, the second switch S2, and the third switch S3, which are connected in parallel.
3. The rectifier module of claim 1, wherein the first switch S1, the second switch S2, the third switch S3, and the fourth switch S4 are switching tubes.
4. The rectifier module of claim 3, wherein the switching tube is a MOS tube or a triode.
5. The rectifier module according to claim 2, wherein the first rectifier element D1, the second rectifier element D2, the third rectifier element D3, the fifth rectifier element D5, the sixth rectifier element D6 and the seventh rectifier element D7 are all diodes or MOS transistors.
6. The rectifier module of claim 5, wherein the fourth rectifier element D4 is a diode.
7. A high-voltage direct-current power supply system is characterized by comprising a high-voltage incoming line cabinet, an isolation transformation cabinet, a rectifier cabinet and a direct-current power distribution cabinet which are sequentially connected;
the high-voltage incoming cabinet is used for connecting high-voltage mains supply to the isolation transformer cabinet;
the isolation transformer cabinet comprises a phase-shifting transformer provided with a plurality of three-phase windings and is used for regulating the voltage of high-voltage commercial power;
the rectifier cabinet comprises a rectifying plug frame and a plurality of rectifying modules arranged on the rectifying plug frame and is used for rectifying the voltage-regulated high-voltage commercial power;
the direct current power distribution cabinet is used for outputting rectified high-voltage commercial power to a load;
wherein the rectifier module is as claimed in any one of claims 1-6.
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| CN113839572A (en) * | 2021-11-03 | 2021-12-24 | 易事特集团(河南)有限公司 | Rectifier module and high-voltage direct-current power supply system |
| CN113839572B (en) * | 2021-11-03 | 2024-05-28 | 易事特储能科技有限公司 | Rectifying module and high-voltage direct-current power supply system |
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