CN206461421U - A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system - Google Patents

A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system Download PDF

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Publication number
CN206461421U
CN206461421U CN201720035474.9U CN201720035474U CN206461421U CN 206461421 U CN206461421 U CN 206461421U CN 201720035474 U CN201720035474 U CN 201720035474U CN 206461421 U CN206461421 U CN 206461421U
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China
Prior art keywords
station
phase
bus
service
power
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CN201720035474.9U
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Chinese (zh)
Inventor
陈堃
叶庞琪
周友斌
徐华安
王婷
胡羽川
杜镇安
肖繁
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hubei Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hubei Electric Power Co Ltd
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Priority to CN201720035474.9U priority Critical patent/CN206461421U/en
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Abstract

The utility model provides a kind of station based on three-phase four-bridge arm converter/station-service straight-flow system, including rectifying part and Converting Unit, wherein rectifying part includes battery, three-phase four-arm rectifier, fuse, disconnecting switch, and Converting Unit includes three-phase four-leg inverter, breaker.Three-phase four-arm rectifier provides AC power by two sections of ac bus, three-phase four-arm rectifier is used to AC power being converted into dc source, DC bus-bar voltage is supported, is powered for station/station-service DC load, battery is connected by fuse, disconnecting switch and dc bus;Three-phase four-leg inverter is connected on dc bus.The utility model can not only ensure the direct current supply quality of power supply under station/factory 400V AC powers three-phase imbalance, nonlinear condition, and single-phase, the three-phase alternating-current supply for ensureing the quality of power supply can be provided under critical station/station-service AC load three-phase imbalance, nonlinear condition.

Description

A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system
Technical field
The utility model is related to power transmission and transformation field, the specifically a kind of station based on three-phase four-bridge arm converter/station-service direct current System.
Background technology
Stand/station-service straight-flow system be applied to transformer station, current conversion station, power plant, for protection, automatics, emergency lighting, Emergency power supply and breaker point, closing operation etc. provide the power-supply system of dc source, are broken down in station/station-service AC system When, by back-up source --- battery continues to provide dc source, while providing dc source for uninterrupted power source UPS.Therefore, Stand/station-service straight-flow system plays vital effect for the safe and stable operation in transformer station, current conversion station, power plant.
Current station/station-service straight-flow system mainly uses the bridge arm rectifier of conventional three-phase three as charger, and by single-phase The UPS that inverter is constituted, there is the input ac power quality of power supply influence output dc source quality of power supply, UPS can only provide The problem of single phase alternating current power supply.At the same time, when critical station/station-service AC load has three-phase imbalance, nonlinear problem Also result in UPS output AC energy Quality Downs.
The content of the invention
For the above-mentioned deficiency of prior art, the utility model proposes a kind of station/factory based on three-phase four-bridge arm converter With straight-flow system, it can be provided under critical station/station-service AC load three-phase imbalance, nonlinear condition and ensure the quality of power supply Single-phase, three-phase alternating-current supply.
The purpose of this utility model takes following technical scheme to realize:
A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system, including rectifying part and Converting Unit, wherein Rectifying part includes battery, three-phase four-arm rectifier, fuse, disconnecting switch, and it is inverse that Converting Unit includes three-phase four-arm Become device, breaker, three-phase four-arm rectifier provides AC power by two sections of ac bus, and three-phase four-arm rectifier is used for will AC power is converted into dc source, supports DC bus-bar voltage, is powered for station/station-service DC load, and battery passes through fusing Device, disconnecting switch and dc bus are connected, during AC power dead electricity, and battery supports the voltage of dc bus;Three-phase four-arm Inverter is connected on dc bus, during AC power dead electricity, and battery provides dc source, and three-phase four-leg inverter will be straight Stream power conversion is AC power, and uninterrupted power supply is carried out to critical station/station-service AC load, and breaker is used in station/station-service When straight-flow system breaks down, isolation is instructed to break down region according to protection act.
Further, each ranking score electric screen, protection circuit and control circuit are connected by breaker with dc bus.
The utility model uses three-phase four-leg inverter as UPS, can not only be in station/factory 400V AC power three-phases Ensure the direct current supply quality of power supply under uneven, nonlinear condition, and can be uneven in critical station/station-service AC load three-phase Single-phase, the three-phase alternating-current supply for ensureing the quality of power supply are provided under weighing apparatus, nonlinear condition.
Brief description of the drawings
Fig. 1 is the structural representation of station of the utility model based on three-phase four-bridge arm converter/station-service straight-flow system.
In figure:1-battery, 2-fuse, 3-disconnecting switch, 4-breaker, 5-three-phase four-arm rectifier, 6-three-phase four-leg inverter.
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is carried out clearly and completely Description.
Fig. 1 show the structural representation of station of the utility model based on three-phase four-bridge arm converter/station-service straight-flow system, Station based on the three-phase four-bridge arm converter/station-service straight-flow system includes rectifying part and Converting Unit, wherein rectifying part Including:Battery 1, three-phase four-arm rectifier 5, fuse 2, disconnecting switch 3;Converting Unit includes:Three-phase four-arm inversion Device 6, breaker 4.Rectifying part is used to realize conversion of the AC power to dc source, DC bus-bar voltage is supported, to station/factory It is powered with DC load.Converting Unit is used to realize conversion of the dc source to AC power, and critical station/station-service is exchanged Load carries out uninterrupted power supply.
Stand/factory's 400V AC powers provide by two sections of ac bus, two sections of ac bus are simultaneously three-phase four-arm rectification Device 5 is powered, and AC power is converted into dc source by three-phase four-arm rectifier 5, DC bus-bar voltage is supported, for station/station-service DC load is powered.
Battery 1 is connected by fuse 2, disconnecting switch 3 with dc bus, stand/factory's 400V AC powers it is normal when, three Phase four bridge legs rectifier 5 carries out floating charging by dc bus to battery 1;Stand/factory 400V AC power dead electricity when, battery The voltage of 1 support dc bus.
Three-phase four-leg inverter 6 is connected on dc bus, stand/factory's 400V AC powers it is normal when, three-phase four-arm Inverter 6 is used as critical station/station-service AC load stand-by power supply;Stand/factory 400V AC power dead electricity when, battery 1 is provided directly Power supply is flowed, dc source is converted into AC power by three-phase four-leg inverter 6, critical station/station-service AC load is carried out not Interruptedly supplying power.Three-phase four-leg inverter 6 can according to critical station/station-service AC load demand, provide respectively it is single-phase, three intersect Flow power supply.
Fuse 2 is used for when internal short circuit fault occurs for battery 1, by battery 1 and dc bus carry out it is quick every From.Disconnecting switch 3 is used as visual disconnected node.
Each ranking score electric screen (such as feed panel, main charging screen, standby charging screen, battery panel), protection circuit and control electricity Road is connected by breaker 4 with dc bus, and breaker 4 is used for when station/station-service straight-flow system breaks down, dynamic according to protection Make instruction isolation to break down region.
It is described above, embodiment only of the present utility model, but protection domain of the present utility model do not limit to It is any to belong to those skilled in the art in the technical scope that the utility model is disclosed in this, the change that can be readily occurred in Change or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with power The protection domain that profit is required is defined.

Claims (2)

1. a kind of station based on three-phase four-bridge arm converter/station-service straight-flow system, it is characterised in that:Including rectifying part and inversion Part, wherein rectifying part include battery (1), three-phase four-arm rectifier (5), fuse (2), disconnecting switch (3), inversion Part includes three-phase four-leg inverter (6), breaker (4), and three-phase four-arm rectifier (5) provides friendship by two sections of ac bus Flow power supply, three-phase four-arm rectifier (5) is used to AC power being converted into dc source, supports DC bus-bar voltage, for station/ Station-service DC load is powered, and battery (1) is connected by fuse (2), disconnecting switch (3) with dc bus, and AC power is lost When electric, battery (1) supports the voltage of dc bus;Three-phase four-leg inverter (6) is connected on dc bus, AC power During dead electricity, battery (1) provides dc source, and dc source is converted into AC power by three-phase four-leg inverter (6), to closing Key station/station-service AC load carries out uninterrupted power supply, and breaker (4) is used for when station/station-service straight-flow system breaks down, according to Protection act instruction isolation is broken down region.
2. the station based on three-phase four-bridge arm converter/station-service straight-flow system as claimed in claim 1, it is characterised in that:It is each etc. Fraction electric screen, protection circuit and control circuit are connected by breaker (4) with dc bus.
CN201720035474.9U 2017-01-12 2017-01-12 A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system Active CN206461421U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720035474.9U CN206461421U (en) 2017-01-12 2017-01-12 A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720035474.9U CN206461421U (en) 2017-01-12 2017-01-12 A kind of station based on three-phase four-bridge arm converter/station-service straight-flow system

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CN206461421U true CN206461421U (en) 2017-09-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112310874A (en) * 2020-10-23 2021-02-02 国网湖北省电力有限公司宜昌供电公司 220V double-charging four-feed direct current system uninterrupted safe replacement method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112310874A (en) * 2020-10-23 2021-02-02 国网湖北省电力有限公司宜昌供电公司 220V double-charging four-feed direct current system uninterrupted safe replacement method

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