CN110798082A

CN110798082A - High-voltage direct-current power supply

Info

Publication number: CN110798082A
Application number: CN201911109117.2A
Authority: CN
Inventors: 姜军; 张斌
Original assignee: Tianjin Dexin Electronic Technology Co Ltd Force Bin
Current assignee: Tianjin Dexin Electronic Technology Co Ltd Force Bin
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-02-14

Abstract

The invention provides a high-voltage direct-current power supply which comprises an incoming line detection circuit U1, a main transformer U2 and a controller, wherein a power supply incoming line end passes through an incoming line switch K1, an incoming line detection circuit U1 and a main contactor K2, a main controller U2 is connected to an anode OUT + of a direct-current output end through a first pulse wave rectifying circuit, an inductor L1, an inductor L3 and an output control switch K3, and is connected to a cathode OUT-of the direct-current output end after passing through a second pulse wave rectifying circuit, an inductor L2 and a current-limiting protector FA2 △ with instantaneous action, and all electric elements are in signal connection with the controller.

Description

High-voltage direct-current power supply

Technical Field

The invention belongs to the field of high-voltage direct-current power supplies, and particularly relates to a high-voltage direct-current power supply.

Background

The urban rail vehicle needs a large number of procedures and model tests before being assembled and debugged to verify whether the performance of the vehicle in all aspects meets the requirements of the vehicle during debugging and operation. In the prior vehicle manufacturing process, the processes and tests are all completed on different areas and different tracks, so that the process of transporting the vehicles back and forth is generated. For example, the vehicle falling adjustment, the rain test, the limit test and the weighing test are positioned at different positions in a workshop, in the process of various vehicle incoming line tests, a movable DC3000V ground power supply vehicle is needed, a power supply vehicle is mainly used for supplying power to a middle direct current link in static debugging of vehicles in a static debugging workshop, the direct current bus voltage of a traction module of an electric locomotive is simulated and is matched with a special test bed for a power module, but the traction power of the existing electric locomotive is different, so that the specifications of the ground power supply vehicle are different, the field needs the power supply vehicles with various specifications, and the resource waste is often caused.

Disclosure of Invention

In view of this, the present invention provides a high voltage dc power supply to provide a high voltage dc power supply that can meet various specifications, and solve the problem of resource waste caused by only one power of the existing ground power supply vehicle.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a high-voltage DC power supply is composed of incoming line detecting circuit U1, main transformer U2 and controller, the incoming line end of power supply is connected to incoming line detecting circuit U1 via incoming line switch K1, the power supply is connected to the input end of main transformer U2 via main contactor K2 after the power supply is passed through incoming line detecting circuit U1, the first output end of main transformer U2 is connected to the first pulse wave rectifier circuit, the positive electrode of the first pulse wave rectifier circuit is connected to the positive electrode OUT + of DC output end via inductor L1, inductor L3 and output control switch K3, the negative electrode of the first pulse wave rectifier circuit is connected to instantaneous protector FAY, incoming line detecting circuit U1 is connected to the control ends of display and controller, the control end of controller is connected to display screen, the power supply and controller of main transformer U9 has synchronous power supply, the second output end of main transformer U2 is connected to the second pulse wave rectifier circuit, the positive electrode of the second pulse wave rectifier circuit is connected to pulse wave L56, the negative electrode of second pulse wave inductor L2 is connected to instantaneous protector via instantaneous protector, the current limiting protector, the instantaneous protector is connected to the instantaneous protector 368672, the instantaneous protector, the instantaneous switch output end of FA-controlled by FA-controlled switch FA-controlled protector, the instantaneous switch FA-controlled protector, the instantaneous protector is connected to FAY, the instantaneous protector, the instantaneous switch FAY, the instantaneous switch is connected to the instantaneous switch 368672, the instantaneous protector.

Further, the controller is of a type REGU-A.

Furthermore, the first pulse wave rectifying circuit is a 12-pulse wave rectifying circuit, and the specific type is △/y-11.

Furthermore, the second pulse wave rectifying circuit is a 12-pulse wave rectifying circuit, and the specific type is △/△ -12.

Further, the capacitor C1 is an electrolytic capacitor.

Further, the incoming line detection circuit U1 is a linear optocoupler isolation detection voltage circuit.

Compared with the prior art, the high-voltage direct-current power supply has the following advantages:

(1) according to the high-voltage direct-current power supply, the pre-stage input of the equipment is 380V +/-10%, 50HZ +/-1%, three-phase five-wire system standard industrial commercial power is subjected to voltage reduction and isolation through the phase-shifting boosting isolation transformer, 600-plus-power 3600V/DC adjustable output is realized through the 12-pulse phase-control rectifying device and the special output filter, the output filtering technology is adopted, the high-voltage direct-current power supply is suitable for application occasions of traction power modules (high-power variable-frequency speed regulators) of electric locomotives, and the high-voltage direct-current power supply has the advantages of strong transient current capacity, high recovery speed, low direct-current voltage ripple and smoothness and continuity.

(2) According to the high-voltage direct-current power supply, three-level filtering measures are adopted for input, a bidirectional harmonic suppression effect is achieved, and influences of harmonic waves and jump characteristics from a power grid on the working efficiency of the power supply are eliminated; meanwhile, the high-order harmonic pollution to the power grid from the traction module is also inhibited, so that the high-order harmonic power grid has good conduction and radiation characteristics, and does not generate electromagnetic interference on surrounding electric equipment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is an electrical schematic block diagram of a high voltage dc power supply according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A high-voltage DC power supply is composed of incoming line detecting circuit U1, main transformer U2 and controller, the incoming line end of power supply is connected to incoming line detecting circuit U1 via incoming line switch K1, the power supply is connected to the input end of main transformer U2 via main contactor K2 after the power supply voltage is passed through incoming line detecting circuit U1, the first output end of main transformer U2 is connected to the first pulse wave rectifier circuit, the positive electrode of the first pulse wave rectifier circuit is connected to the positive electrode OUT + of DC output end via inductor L1, inductor L3 and output control switch K3, the negative electrode of the first pulse wave rectifier circuit is connected to instantaneous current limiting protector FAY, incoming line detecting circuit U1 is connected to the control ends of display and controller, the control end of controller is connected to display, the power supply and controller of main transformer U9 has synchronous power supply, the second output end of main transformer U2 is connected to the second pulse wave rectifier circuit, the positive electrode of the second pulse wave rectifier circuit is connected to pulse wave inductor L2, the negative electrode of the second pulse wave rectifier circuit is connected to the instantaneous current limiting protector via FA-control circuit 8672, the current limiting protector, the harmonic control circuit is connected to the output end of the current limiting protector, the instantaneous current limiting protector, the harmonic control protector, the harmonic protector is connected to the harmonic control protector, the harmonic protector is connected to the harmonic protector, the harmonic protector.

The front-stage input of the equipment is 380V +/-10 percent and 50HZ +/-1 percent, three-phase five-wire system standard industrial commercial power is subjected to voltage reduction and isolation through a phase-shifting boosting isolation transformer, and then 600-phase 3600V/DC adjustable output is realized through a 12-pulse phase-control rectifying device and a special output filter. The output filtering technology is adopted, the device is suitable for the application occasions of traction power modules (high-power variable-frequency speed regulators) of electric locomotives, and has the advantages of strong transient current capability, high recovery speed, low and smooth and continuous direct-current voltage ripple, stable direct-current bus voltage of the traction modules and small electric load of IGBT (insulated gate bipolar transistor) power devices in the traction modules.

The display is a commonly used LED display screen.

The controller is in a model of REGU-A, digitalization is realized from pulse phase shift, fimutexed width, balance and modulation, the silicon controlled rectifier drive adopts an advanced bipolar pulse triggering technology, the response speed is high, the waveform symmetry is good, the anti-interference capability is strong, and the controller is suitable for complemutex electromagnetic environments.

The first pulse wave rectifying circuit is a 12-pulse wave rectifying circuit, and the specific type is △/y-11.

The second pulse wave rectifying circuit is a 12-pulse wave rectifying circuit, and the specific type is △/△ -12.

The capacitor C1 is an electrolytic capacitor.

The incoming line detection circuit U1 is a linear optical coupling isolation detection voltage circuit, which is a common circuit in the industry, i.e., common knowledge, and therefore is not described in detail.

The device is a movable DC3000V ground power supply vehicle, is mainly used for supplying power to a direct current link in static debugging of vehicles in a static debugging workshop, simulates the direct current bus voltage of a traction module of an electric locomotive, is matched with a special test bed for a power module, can output high-voltage smooth direct current voltage (600 plus 3600V regulation) with customized specifications of 750V/DC, 1500V/DC and 3000V/DC, outputs 72KW, and meets the static debugging test of traction power modules of the electric locomotives with three specifications.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A high-voltage direct-current power supply is characterized by comprising an incoming line detection circuit U1, a main transformer U2 and a controller, wherein a power supply incoming line end is connected to an incoming line detection circuit U1 through an incoming line switch K1, the power supply is connected to an input end of a main transformer U2 through a main contactor K2 after the power supply voltage is detected to be qualified through an incoming line detection circuit U1, a first output end of the main transformer U2 is connected to a first pulse wave rectification circuit, the positive electrode of the first pulse wave rectification circuit is connected to a positive electrode OUT + of a direct-current output end through an inductor L1, an inductor L3 and an output control switch K3 in sequence, the negative electrode of the first pulse wave rectification circuit is connected to a current limiting protector FAY with instantaneous action, an incoming line detection circuit U1 is respectively connected to control ends of a display and a controller in sequence, a control end signal of the controller is connected to a display, the power supply and the controller of the main transformer U2 is provided with a synchronous power supply, a second output end of the main transformer U2 is connected to a second pulse wave rectification circuit, the positive electrode of the second pulse wave rectification circuit is connected to a pulse wave detection circuit L2, the second pulse wave detection circuit, the negative electrode of the second pulse wave detection circuit is connected to a current limiting protector, the FA-current-control protector, the FA-control circuit FAY, the FA-control circuit is connected to an output end of the instant-control protector, a current-control circuit FAY, a current-control circuit-control protector with a current-control-.

2. A high voltage dc power supply according to claim 1, wherein: the controller is model number REGU-A.

3. The HVDC power supply of claim 1, wherein the first pulse wave rectifier circuit is a 12 pulse wave rectifier circuit of type △/y-11.

4. The HVDC power supply of claim 1, wherein the second pulse rectification circuit is a 12-pulse rectification circuit of type △/△ -12.

5. A high voltage dc power supply according to claim 1, wherein: the capacitor C1 is an electrolytic capacitor.

6. A high voltage dc power supply according to claim 1, wherein: the incoming line detection circuit U1 is a linear optical coupling isolation detection voltage circuit.