CN114188932A - Intelligent bus coupler applied to station direct-current power supply system - Google Patents
Intelligent bus coupler applied to station direct-current power supply system Download PDFInfo
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- CN114188932A CN114188932A CN202111240479.2A CN202111240479A CN114188932A CN 114188932 A CN114188932 A CN 114188932A CN 202111240479 A CN202111240479 A CN 202111240479A CN 114188932 A CN114188932 A CN 114188932A
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- 239000003990 capacitor Substances 0.000 claims abstract description 126
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000004804 winding Methods 0.000 claims description 36
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides an intelligent bus coupler device applied to a direct-current power supply system for a station, which comprises a DC/DC power supply conversion module and a super capacitor set; two ends of the DC/DC power conversion module are connected between the section I direct-current bus and the section II direct-current bus, and two ends of the DC/DC power conversion module are respectively connected with a group of super capacitor groups; when the voltage of the direct current bus at the section I and the voltage of the direct current bus at the section II are normal, the two ends of the DC/DC power supply conversion module do not output; when the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is reduced, the DC/DC power supply conversion module is conducted, and the normal operation of the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is guaranteed. The invention adopts the DC/DC power inversion technology to invert and output, and is bridged between two sets of direct current systems, so that the two sets of independent direct current systems are mutually standby. The invention configures enough super capacitor for short circuit trip power supply to make up the problem of power module output power.
Description
Technical Field
The invention relates to the technical field of direct-current voltage systems for stations, in particular to an intelligent bus coupler device applied to a direct-current power supply system for stations.
Background
The low-voltage DC power supply system is applied to hydraulic power plants, thermal power plants, various transformer substations and other places using DC equipment, and is power supply equipment for providing DC power supply for signal equipment, protection, automatic devices, emergency lighting, emergency power supply and breaker opening and closing operations. In order to provide reliable uninterrupted power supply for the power secondary equipment, a storage battery pack is designed as a backup power supply for the direct-current system; two sets of direct current systems are also designed for the transformer substation with the scale of 110kV or more, and the two sets of independent direct current systems are mutually standby. At present, two sets of direct current systems are mutually standby and are interconnected through a bus-coupled disconnecting link which needs manual operation; only when the DC power supply is overhauled, the device plays a role. Because the maintenance means of the storage battery is limited, in recent years, a plurality of power accidents are found to be caused by the fact that the station AC power failure occurs and the fault of the storage battery pack cannot provide DC system accident current; if two sets of direct current systems which are mutually standby at the moment can automatically realize standby operation, the occurrence of electric power system accidents caused by similar reasons can be avoided, and the safety of the electric power system is greatly improved.
Disclosure of Invention
The invention aims to provide an intelligent bus connection device applied to a station direct-current power supply system, wherein an isolated hot standby device is used for constructing a direct-current system bus connection, so that the direct-current system has one more layer of guarantee, and the safe production of electric power is ensured.
The purpose of the invention is realized by the following technical scheme:
an intelligent bus coupler applied to a direct-current power supply system for a station comprises a DC/DC power supply conversion module and a super capacitor set; two ends of the DC/DC power conversion module are connected between the section I direct-current bus and the section II direct-current bus, and two ends of the DC/DC power conversion module are respectively connected with a group of super capacitor groups; when the voltage of the direct current bus at the section I and the voltage of the direct current bus at the section II are normal, the two ends of the DC/DC power supply conversion module do not output; when the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is reduced, the DC/DC power supply conversion module is conducted, and the normal operation of the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is guaranteed.
Further, the DC/DC power conversion module comprises two half-bridge LLC resonant converters connected in an inverse and parallel mode.
Further, the first half-bridge LLC resonant converter includes a MOS transistor Q1, a MOS transistor Q2, a diode D1, a diode D2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, an inductor L1, an inductor L2, and a transformer T1; two ends of the capacitor C1 are used as the first end of the DC/DC power conversion module to be connected with an I-section direct current bus; the resistor R1 is connected in parallel across the capacitor C1; the drain of the MOS transistor Q1 is connected with one end of the resistor R1, the source of the MOS transistor Q1 is connected with the drain of the MOS transistor Q2, and the source of the MOS transistor Q2 is connected with the other end of the resistor R1; the capacitor C2 and the capacitor C3 are connected in series and then connected between the drain electrode of the MOS transistor Q1 and the source electrode of the MOS transistor Q2, and the series node of the capacitor C2 and the capacitor C3 is connected with the source electrode of the MOS transistor Q1; one end of the capacitor C4 is connected with the source electrode of the MOS transistor Q1, the other end of the capacitor C4 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with one end of the primary winding of the T1 of the transformer, and the other end of the primary winding of the T1 of the transformer is connected with the source electrode of the MOS transistor Q2; the inductor L2 is connected to two ends of the primary winding of the transformer T1; one end of the secondary winding of the transformer T1 is connected to the anode of the diode D1, and the other end of the secondary winding of the transformer T1 is connected to the anode of the diode D2.
Further, the second half-bridge LLC resonant converter includes a MOS transistor Q3, a MOS transistor Q4, a diode D3, a diode D4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a resistor R2, an inductor L3, an inductor L4, and a transformer T2; two ends of the capacitor C2 are used as a second end of the DC/DC power conversion module to be connected with a II-section direct current bus, and the resistor R2 is connected in parallel with two ends of the capacitor C2; the drain of the MOS transistor Q3 is connected with one end of the resistor R2, the source of the MOS transistor Q3 is connected with the drain of the MOS transistor Q4, and the source of the MOS transistor Q4 is connected with the other end of the resistor R2; the capacitor C6 and the capacitor C7 are connected in series and then connected between the drain electrode of the MOS transistor Q3 and the source electrode of the MOS transistor Q4, and the series node of the capacitor C6 and the capacitor C7 is connected with the source electrode of the MOS transistor Q3; one end of the capacitor C8 is connected with the source electrode of the MOS transistor Q3, the other end of the capacitor C8 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with one end of the primary winding of the transformer T2, and the other end of the primary winding of the transformer T2 is connected with the source electrode of the MOS transistor Q4; the inductor L4 is connected to two ends of the primary winding of the transformer T2; one end of the secondary winding of the transformer T2 is connected with the anode of the diode D3, and the other end of the secondary winding of the transformer T2 is connected with the anode of the diode D4;
the cathode of the diode D1 and the cathode of the diode D2 are connected with the drain electrode of the MOS transistor Q3, and the center tap of the secondary winding of the transformer T1 is connected with the source electrode of the MOS transistor Q4; the cathode of the diode D3 and the cathode of the diode D4 are connected with the drain of the MOS transistor Q1, and the center tap of the secondary winding of the transformer T2 is connected with the source of the MOS transistor Q2.
Furthermore, the super capacitor group is formed by connecting a plurality of single capacitor units in series.
Further, the super capacitor bank is connected with a discharge management circuit in parallel, and the discharge management circuit comprises a resistor R3, a resistor R4 and a diode D5; one end of the resistor R3, one end of the resistor R4 and the anode of the diode D5 are connected with the anode of a super capacitor bank, the other end of the resistor R3, the other end of the resistor R4 and the cathode of the diode D5 are connected with the anode of a direct current bus, and the cathode of the super capacitor bank is connected with the cathode of the direct current bus.
Furthermore, each monomer capacitor unit is connected with a current-sharing circuit in parallel, the current-sharing circuit comprises a resistor Rn and a switch tube Sn, one end of the resistor Rn is connected with one end of each monomer capacitor unit, the other end of the resistor Rn is connected with the drain electrode of the switch tube Sn, and the source electrode of the switch tube Sn is connected with the other end of each monomer capacitor unit.
Compared with the prior art, the intelligent bus coupler device applied to the DC power supply system for the station has the following beneficial effects:
(1) the DC/DC power inversion technology is used for inverting output and is bridged between the two sets of direct current systems, so that the two sets of independent direct current systems are mutually standby.
(2) And enough super capacitors are configured to supply a short-circuit tripping power supply, so that the problem of power module output power is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic access diagram of an intelligent bus coupler applied to a station dc power supply system according to the present invention;
FIG. 2 is a schematic circuit diagram of the DC/DC power conversion module of the present invention;
FIG. 3 is a circuit schematic of the discharge management circuit of the present invention;
FIG. 4 is a schematic circuit diagram of a current equalizing circuit of the super capacitor bank according to the present invention;
fig. 5 is a circuit schematic diagram of the dc bus voltage acquisition circuit of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The intelligent bus coupler device applied to the direct-current power supply system for the station, disclosed by the invention, comprises a DC/DC power supply conversion module and a super capacitor set, as shown in figure 1; two ends of the DC/DC power conversion module are connected between the I section direct current bus and the II section direct current bus, and two ends of the DC/DC power conversion module are respectively connected with a group of super capacitor groups. The DC/DC power supply conversion module is mainly used for providing a normal load working power supply for the direct current system, and the super capacitor bank is used for providing an accident tripping power supply for the direct current system.
The circuit schematic diagram of the DC/DC power conversion module is shown in fig. 2, and two half-bridge LLC resonant converters are connected in parallel in opposite directions to realize bidirectional DC/DC isolated output. Specifically, the DC/DC power conversion module includes a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a resistor R1, a resistor R2, an inductor L1, an inductor L2, an inductor L3, an inductor L4, a transformer T1, and a transformer T2. Two ends of the capacitor C1 are used as the first end of the DC/DC power conversion module to be connected with the I-section direct current bus, and the resistor R1 is connected in parallel with two ends of the capacitor C1. The drain of MOS transistor Q1 is connected to one end of resistor R1, the source of MOS transistor Q1 is connected to the drain of MOS transistor Q2, and the source of MOS transistor Q2 is connected to the other end of resistor R1. The capacitor C2 and the capacitor C3 are connected in series and then connected between the drain of the MOS transistor Q1 and the source of the MOS transistor Q2, and the series node of the capacitor C2 and the capacitor C3 is connected with the source of the MOS transistor Q1. One end of a capacitor C4 is connected with the source electrode of the MOS transistor Q1, the other end of a capacitor C4 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a primary winding of a transformer T1, and the other end of the primary winding of the transformer T1 is connected with the source electrode of the MOS transistor Q2. An inductor L2 is connected across the primary winding of transformer T1. One end of the secondary winding of the transformer T1 is connected to the anode of the diode D1, and the other end of the secondary winding of the transformer T1 is connected to the anode of the diode D2.
Two ends of the capacitor C2 are used as the second end of the DC/DC power conversion module to be connected with the II-section direct current bus, and the resistor R2 is connected in parallel with two ends of the capacitor C2. The drain of MOS transistor Q3 is connected to one end of resistor R2, the source of MOS transistor Q3 is connected to the drain of MOS transistor Q4, and the source of MOS transistor Q4 is connected to the other end of resistor R2. The capacitor C6 and the capacitor C7 are connected in series and then connected between the drain of the MOS transistor Q3 and the source of the MOS transistor Q4, and the series node of the capacitor C6 and the capacitor C7 is connected with the source of the MOS transistor Q3. One end of a capacitor C8 is connected with the source electrode of the MOS transistor Q3, the other end of a capacitor C8 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with one end of a primary winding of a transformer T2, and the other end of the primary winding of the transformer T2 is connected with the source electrode of the MOS transistor Q4. An inductor L4 is connected across the primary winding of transformer T2. One end of the secondary winding of the transformer T2 is connected to the anode of the diode D3, and the other end of the secondary winding of the transformer T2 is connected to the anode of the diode D4.
The cathode of the diode D1 and the cathode of the diode D2 are connected with the drain of the MOS transistor Q3, and the center tap of the secondary winding of the transformer T1 is connected with the source of the MOS transistor Q4. The cathode of the diode D3 and the cathode of the diode D4 are connected with the drain of the MOS transistor Q1, and the center tap of the secondary winding of the transformer T2 is connected with the source of the MOS transistor Q2.
The working principle of fig. 2 is: the voltage of the I section direct current bus is V1, and the voltage of the II section direct current bus is V2; a voltage slightly lower than the bus voltage is output by the half bridge LLC resonant converter. When the bus voltage normally operates, all of the D1, the D2, the D3 and the D4 are cut off, and no output of the DC/DC power conversion module is output. If the V1 is abnormal, the bus voltage is reduced, the D3 and the D4 are conducted, and the normal operation of the voltage of the I-section direct-current bus is guaranteed; if V2 is abnormal, the bus voltage drops, D1 and D2 are conducted, and normal operation of the II-section direct-current bus voltage is guaranteed.
500F2.7V capacitors are selected as basic units in the super capacitor bank, 100 single capacitor units are connected in series in each capacitor bank, and the capacitance of the capacitor bank is 5F, so that the requirement of large-current instantaneous discharge can be met.
Preferably, as shown in fig. 3, the charging and discharging management circuit is designed for the super capacitor bank, and includes a resistor R3, a resistor R4 and a diode D5, where C is the super capacitor bank. One end of the resistor R3, one end of the resistor R4 and the anode of the diode D5 are connected with the anode of the super capacitor bank, the other end of the resistor R3, the other end of the resistor R4 and the cathode of the diode D5 are connected with the anode of the direct current bus, and the cathode of the super capacitor bank is connected with the cathode of the direct current bus.
In fig. 3, resistors R3 and R4 are capacitor charging current limiting resistors, and D5 is a battery discharge loop. When the impact load comes, the bus voltage drops, and the capacitor discharges through a D5 loop; after the bus voltage is recovered, the bus voltage is charged through the R3 and R4 loops.
Preferably, a current-sharing circuit is designed at two ends of each capacitor of the super capacitor bank, the current-sharing circuit comprises a resistor and a switch tube, and as shown in fig. 4, the single capacitors C1 to C100 are connected in series to form the super capacitor bank. The current equalizing circuit of the capacitor C1 comprises a resistor R1 and a switch tube S1, one end of the resistor R1 is connected with one end of the capacitor C1, the other end of the resistor R1 is connected with the drain electrode of the switch tube S1, and the source electrode of the switch tube S1 is connected with the other end of the capacitor C1. The current equalizing circuit of the capacitor Cn comprises a resistor Rn and a switch tube Sn, wherein one end of the resistor Rn is connected with one end of the capacitor Cn, the other end of the resistor Rn is connected with the drain electrode of the switch tube Sn, and the source electrode of the switch tube Sn is connected with the other end of the capacitor Cn. The input and shunt of the capacitor are controlled by controlling the size of the resistor in each current equalizing circuit, and the current equalization is performed on the capacitor charging.
Further, a bus voltage acquisition circuit is designed to realize the output of the DC/DC power conversion module. The method comprises the steps of firstly dividing the bus voltage through a resistor, carrying out isolation discharge on the divided weak voltage through an AMC1200 optocoupler, finally amplifying through an AD8552 operational amplifier, and carrying out AD sampling after amplification is finished.
And voltage of the monomer capacitor unit is acquired, the highest voltage is 2.7V, and the voltage is directly acquired by using resistance voltage division.
The equipment main control CPU is responsible for collecting bus voltage and capacitor unit voltage, utilizes the bus voltage to control the bidirectional DC/DC output of the intelligent bus-tie, and utilizes the capacitor unit voltage to control the balance.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (7)
1. An intelligent bus coupler device applied to a direct-current power supply system for a station is characterized by comprising a DC/DC power supply conversion module and a super capacitor set; two ends of the DC/DC power conversion module are connected between the section I direct-current bus and the section II direct-current bus, and two ends of the DC/DC power conversion module are respectively connected with a group of super capacitor groups; when the voltage of the direct current bus at the section I and the voltage of the direct current bus at the section II are normal, the two ends of the DC/DC power supply conversion module do not output; when the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is reduced, the DC/DC power supply conversion module is conducted, and the normal operation of the voltage of the I-section direct current bus or the voltage of the II-section direct current bus is guaranteed.
2. The intelligent bus coupler applied to the station direct-current power supply system according to claim 1, wherein the DC/DC power conversion module comprises two reverse parallel-connected half-bridge LLC resonant converters.
3. The intelligent bus coupler applied to the station direct-current power supply system of claim 2, wherein the first half-bridge LLC resonant converter comprises a MOS transistor Q1, a MOS transistor Q2, a diode D1, a diode D2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, an inductor L1, an inductor L2 and a transformer T1; two ends of the capacitor C1 are used as the first end of the DC/DC power conversion module to be connected with an I-section direct current bus; the resistor R1 is connected in parallel across the capacitor C1; the drain of the MOS transistor Q1 is connected with one end of the resistor R1, the source of the MOS transistor Q1 is connected with the drain of the MOS transistor Q2, and the source of the MOS transistor Q2 is connected with the other end of the resistor R1; the capacitor C2 and the capacitor C3 are connected in series and then connected between the drain electrode of the MOS transistor Q1 and the source electrode of the MOS transistor Q2, and the series node of the capacitor C2 and the capacitor C3 is connected with the source electrode of the MOS transistor Q1; one end of the capacitor C4 is connected with the source electrode of the MOS transistor Q1, the other end of the capacitor C4 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with one end of the primary winding of the T1 of the transformer, and the other end of the primary winding of the T1 of the transformer is connected with the source electrode of the MOS transistor Q2; the inductor L2 is connected to two ends of the primary winding of the transformer T1; one end of the secondary winding of the transformer T1 is connected to the anode of the diode D1, and the other end of the secondary winding of the transformer T1 is connected to the anode of the diode D2.
4. The intelligent bus coupler applied to the station direct-current power supply system according to claim 3, wherein the second half-bridge LLC resonant converter comprises a MOS transistor Q3, a MOS transistor Q4, a diode D3, a diode D4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a resistor R2, an inductor L3, an inductor L4 and a transformer T2; two ends of the capacitor C2 are used as a second end of the DC/DC power conversion module to be connected with a II-section direct current bus, and the resistor R2 is connected in parallel with two ends of the capacitor C2; the drain of the MOS transistor Q3 is connected with one end of the resistor R2, the source of the MOS transistor Q3 is connected with the drain of the MOS transistor Q4, and the source of the MOS transistor Q4 is connected with the other end of the resistor R2; the capacitor C6 and the capacitor C7 are connected in series and then connected between the drain electrode of the MOS transistor Q3 and the source electrode of the MOS transistor Q4, and the series node of the capacitor C6 and the capacitor C7 is connected with the source electrode of the MOS transistor Q3; one end of the capacitor C8 is connected with the source electrode of the MOS transistor Q3, the other end of the capacitor C8 is connected with one end of the inductor L3, the other end of the inductor L3 is connected with one end of the primary winding of the transformer T2, and the other end of the primary winding of the transformer T2 is connected with the source electrode of the MOS transistor Q4; the inductor L4 is connected to two ends of the primary winding of the transformer T2; one end of the secondary winding of the transformer T2 is connected with the anode of the diode D3, and the other end of the secondary winding of the transformer T2 is connected with the anode of the diode D4;
the cathode of the diode D1 and the cathode of the diode D2 are connected with the drain electrode of the MOS transistor Q3, and the center tap of the secondary winding of the transformer T1 is connected with the source electrode of the MOS transistor Q4; the cathode of the diode D3 and the cathode of the diode D4 are connected with the drain of the MOS transistor Q1, and the center tap of the secondary winding of the transformer T2 is connected with the source of the MOS transistor Q2.
5. The intelligent bus coupler device applied to the station direct-current power supply system as claimed in claim 1, wherein the super capacitor group is formed by connecting a plurality of single capacitor units in series.
6. The intelligent bus coupler applied to the station direct-current power supply system according to claim 1, wherein the super capacitor bank is connected with a discharge management circuit in parallel, and the discharge management circuit comprises a resistor R3, a resistor R4 and a diode D5; one end of the resistor R3, one end of the resistor R4 and the anode of the diode D5 are connected with the anode of a super capacitor bank, the other end of the resistor R3, the other end of the resistor R4 and the cathode of the diode D5 are connected with the anode of a direct current bus, and the cathode of the super capacitor bank is connected with the cathode of the direct current bus.
7. The intelligent bus coupler applied to the station direct-current power supply system according to claim 5, wherein each single capacitor unit is connected with a current-sharing circuit in parallel, the current-sharing circuit comprises a resistor Rn and a switch tube Sn, one end of the resistor Rn is connected with one end of the single capacitor unit, the other end of the resistor Rn is connected with a drain electrode of the switch tube Sn, and a source electrode of the switch tube Sn is connected with the other end of the single capacitor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111240479.2A CN114188932B (en) | 2021-10-25 | 2021-10-25 | Intelligent bus-bar device applied to station direct-current power supply system |
Applications Claiming Priority (1)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986173A (en) * | 2014-04-08 | 2014-08-13 | 广西电网公司电力科学研究院 | Power electronic transformer control method and system |
| CN203859583U (en) * | 2014-04-01 | 2014-10-01 | 蒋德高 | Multipath parallel redundant substation DC power supply system |
| CN105634288A (en) * | 2016-01-04 | 2016-06-01 | 河南理工大学 | Supercapacitor energy storage system based bidirectional DC/DC converter topology |
| CN110504672A (en) * | 2019-09-06 | 2019-11-26 | 中国船舶重工集团公司第七0四研究所 | The design protection method of ship direct current synthesis electrical method system and system |
| CN211556956U (en) * | 2019-11-25 | 2020-09-22 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation |
| CN112769121A (en) * | 2021-01-19 | 2021-05-07 | 国海峰 | Direct current bus energy absorption and feedback system structure and control method |
-
2021
- 2021-10-25 CN CN202111240479.2A patent/CN114188932B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203859583U (en) * | 2014-04-01 | 2014-10-01 | 蒋德高 | Multipath parallel redundant substation DC power supply system |
| CN103986173A (en) * | 2014-04-08 | 2014-08-13 | 广西电网公司电力科学研究院 | Power electronic transformer control method and system |
| CN105634288A (en) * | 2016-01-04 | 2016-06-01 | 河南理工大学 | Supercapacitor energy storage system based bidirectional DC/DC converter topology |
| CN110504672A (en) * | 2019-09-06 | 2019-11-26 | 中国船舶重工集团公司第七0四研究所 | The design protection method of ship direct current synthesis electrical method system and system |
| CN211556956U (en) * | 2019-11-25 | 2020-09-22 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation |
| CN112769121A (en) * | 2021-01-19 | 2021-05-07 | 国海峰 | Direct current bus energy absorption and feedback system structure and control method |
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