Alternating current and direct current power supply box special for substation maintenance

Abstract

The invention discloses a special alternating-current and direct-current power supply box for substation maintenance, which is characterized in that the upper surface of the power supply box is provided with input terminals and output ports, the input terminals comprise three-phase input terminals A, B and C, a zero line input terminal N and a protective grounding line input terminal PE, and the output ports have independent leakage protectors and overload short-circuit protection functions; three-phase output terminals a, b and c and a single-phase live wire terminal L; alternating current air switches Q1-Q6, a three-phase four-wire socket and a three-wire socket; power indicating lamps LA, LB and LC; a handle is arranged at the top of the power box cover, and two hasps are arranged between the power box cover and the box body; one air switch can control a plurality of sockets, a three-phase power supply can be independently detected, a direct current output part of the power box can be used as a temporary or emergency high-voltage switch opening and closing operation power supply, and the purposes of opening and closing operation of a high-voltage switch, starting voltage test and display and high-voltage switch energy storage motor power supply can be completed.

Description

Technical Field

[0001] The invention relates to the field of tools in the electric power industry, in particular to an AC / DC power supply box dedicated to substation maintenance. Background Art

[0002] In substation maintenance work, the power box is a vital equipment that can provide operating power for construction tools, circuit breakers and other high-voltage switches, and provide strong support for the maintenance and maintenance of substation equipment. However, there are many problems with traditional power boxes, which limit the efficiency and safety of substation maintenance work. For example, there are few types of output ports, which usually cannot meet the actual maintenance power requirements, resulting in the need for construction personnel to use extension cords or other auxiliary equipment to meet work needs; some power boxes do not have leakage protection functions, which may cause danger to personnel in the event of leakage; one power box controls multiple sockets, and once a fault occurs, it may cause power outages to multiple sockets at the same time, affecting construction efficiency; the power box lacks a power-on indicator light, and construction personnel need to confirm whether the power is on after the plug is inserted into the socket, wasting time and affecting work efficiency; some power boxes lack DC output and cannot meet the on-site DC power supply needs, such as high-voltage switch opening and closing operations, starting voltage testing and display, and power supply of high-voltage switch energy storage motors. Based on the actual on-site work of substation maintenance, there is an urgent need for a dedicated AC / DC power supply box that solves the above problems. Summary of the invention

[0003] The existing technology has the problem that traditional power boxes limit the efficiency and safety of substation maintenance work. For example, there are few types of output ports, which usually cannot meet the actual maintenance power requirements, resulting in construction personnel using extension cords or other auxiliary equipment to meet work needs; some power boxes have circuit breakers without leakage protection function, and once leakage occurs, it may pose a danger to personnel; one circuit breaker in the power box controls multiple sockets, and once a fault occurs, it may cause power outages to multiple sockets at the same time, affecting construction efficiency; the power box lacks a power-on indicator light, and construction personnel need to insert the plug into the socket to confirm whether the power is on, wasting time and affecting work efficiency; some power boxes lack DC output and cannot meet on-site DC power supply needs, such as high-voltage switch opening and closing operations, starting voltage testing and display, and power supply to the high-voltage switch energy storage motor.

[0004] In order to solve the above problems, the present invention provides a special AC and DC power supply box for substation maintenance, comprising:

[0005] The upper surface of the power box is provided with five input terminals and five output ports, the five input terminals include: three three-phase input terminals A, B, C, a neutral line input terminal N, and a protective ground line input terminal PE, the output ports are all equipped with independent leakage protectors and overload and short circuit protection functions, the leakage protectors are divided into 1 main leakage protector and 5 sub-leakage protectors;

[0006] The upper surface of the power box is provided with three three-phase output terminals a, b, c and a single-phase live wire terminal L;

[0007] The upper surface of the power box is provided with a DC voltage positive terminal V+ and a DC voltage negative terminal V-.

[0008] The upper surface of the power box is provided with six AC circuit breakers Q1, Q2, Q3, Q4, Q5, and Q6.

[0009] A 380V three-phase four-wire socket and a 220V three-wire socket are provided at the lower left of the upper surface of the power box;

[0010] The upper surface of the power box includes three power indicator lights LA, LB, and LC, which independently detect the three-phase power supply;

[0011] The adjustable DC voltage output part of the power supply box comprises: an electronic voltage regulator, a full-bridge rectifier circuit, a DC voltage display, a voltage stabilizing capacitor and a terminal;

[0012] The DC voltage display input terminal is connected to the electronic voltage regulator input terminal, and the output terminal is connected to both ends of the voltage stabilizing capacitor;

[0013] A handle is provided on the top of the power box cover, and two buckles are provided between the power box cover and the box body;

[0014] Based on the above settings, the specific connection method of the power box is as follows:

[0015] The three-phase input terminals A, B, C and the neutral line input terminal N are connected to the input terminal of the AC circuit breaker Q1, the output terminal of the AC circuit breaker Q1 is connected to the input terminals of the AC circuit breakers Q2 and Q3, the output terminal of the AC circuit breaker Q2 is connected to the 380V three-phase four-wire socket, the AC circuit breaker Q3 is connected to the three-phase output terminals a, b, c, and the output terminal of the neutral line input terminal N, the power indicator lights LA, LB, LC are respectively connected to the three-phase input terminals A, B, C and the neutral line input terminal N, the input terminal of the AC circuit breaker Q4 is connected to the output terminal of the AC circuit breaker Q1 and the three-phase input terminal C and the neutral line input terminal N, the output terminal of the AC circuit breaker Q4 is connected to the single-phase live wire terminal The line terminal L is connected to the neutral line input terminal N, the input end of the AC circuit breaker Q5 is connected to the protective earth line input terminal PE, the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q5 is connected to the 220V three-wire socket, the input end of the AC circuit breaker Q6 is connected to the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q6 is connected to the electronic voltage regulator, the output end of the electronic voltage regulator is connected to the AC side of the full-bridge rectifier circuit, the filter capacitor and the output terminal are connected to the DC side of the full-bridge rectifier circuit, the power supply end of the DC voltage display is connected to the output side of the AC circuit breaker Q6, and the measuring end of the DC voltage display is connected to the DC side of the full-bridge rectifier circuit.

[0016] In the preferred mode, in order to ensure the safety, stability and service life of the power box, an AC high-power thyristor is selected as the electronic voltage regulator, and a full-bridge rectifier circuit is selected as the main rectifier component.

[0017] In a preferred embodiment, in order to ensure the stability of the DC output voltage, a voltage stabilizing capacitor is connected in parallel with the DC output.

[0018] In a preferred embodiment, the DC voltage output part of the power supply box can output a DC voltage of 15V-220V by adjusting the knob of the electronic voltage regulator.

[0019] In a preferred embodiment, the current output DC voltage value can be displayed on the DC voltage display.

[0020] The beneficial effects of the present invention are as follows: the present invention has a reasonable design, a simple structure, is easy to carry, and has five output ports, which can meet the actual power demand at the substation maintenance site, and solves the problem of the small number of output ports of the traditional maintenance power supply box. The output ports are all equipped with independent leakage protectors and overload and short-circuit protection functions, which solves the problem that some circuit breakers in the traditional power supply box have no leakage protection and one circuit breaker controls multiple sockets. The power cord includes three power indicator lights, which can independently detect the three-phase power supply, which solves the problem that the traditional power supply box has no power-on indicator light. The power box can output a DC voltage of 15V-220V, which solves the problem of no DC operating power supply during power outage maintenance, and the DC output part of the power box can be used as a temporary or emergency high-voltage switch opening and closing operation power supply, which can complete the opening and closing operations of the high-voltage switch, the starting voltage test and display, and the power supply of the high-voltage switch energy storage motor, which provides a more convenient and flexible operation method for power maintenance work, and improves work efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 It is a side view structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the interface of the AC / DC power supply box dedicated for substation maintenance of the present invention;

[0025] Figure 5 This is a circuit diagram of a dedicated AC / DC power supply box for substation maintenance of the present invention;

[0026] Legend: 1. Box cover; 2. Box body; 3. Handle; 4. Buckle. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1:

[0029] Reference Figure 1 , Figure 2 and Figure 3 The power box of the present invention is 30 cm long, 20 cm wide and 15 cm high. For easy carrying and use, a handle is provided on the top of the box cover for easy movement. Two buckles are designed between the box cover and the box body to ensure that the power box will not be accidentally opened during transportation or use. In order to ensure the stability of the box body during use, the center of gravity of the power box should be in the center of the bottom of the box body.

[0030] Reference Figure 4The power box includes five input terminals and five output ports, which meet the input conditions of three-phase five-wire 380V AC voltage and 220V single-phase AC voltage. It has five output ports, namely 380V three-phase four-wire socket output port, 380V three-phase four-wire terminal output port, 220V two-wire terminal output port, 220V three-wire socket output port and 15-220V adjustable DC voltage output port.

[0031] The output ports of the power box are all equipped with independent leakage protectors and overload and short-circuit protection functions. The leakage protector can be directly built into the power plug, or you can choose to add an independent leakage protector to the power line. These all need to be determined according to the specific situation.

[0032] The three-phase input of the power box includes three power indicator lights, which can independently detect the power status of each phase of the power supply. There are many ways to implement the power indicator light, and LED lights can be used. The specific implementation method is as follows: drill a hole of appropriate size at a suitable position of the box, fix the LED light on the hole, connect the power cord to the positive pole of the LED light, control the current through a current limiting resistor, and connect the negative pole of the LED light to the negative pole of the power supply.

[0033] In order to ensure the waterproof effect of the input and output terminals, the present invention also considers adding a waterproof cover to the outside of the terminal during design. The material of this waterproof cover is a plastic material with good waterproof performance, such as polyurethane, PVC, etc. The waterproof cover adopts a double-layer structure, and the outer layer is a circular convex design, which can completely wrap the interface part of the input and output terminals to prevent moisture from penetrating into the power box from the terminal interface part. The inner layer is a circular planar structure, which fits the bottom of the waterproof cover shell, and the waterproof effect is ensured by multiple sealing strips. In actual use, the operator needs to remove the waterproof cover before connecting the input and output terminals, and then put the waterproof cover back in place and press it after completing the connection to ensure that the terminal interface is completely wrapped by the waterproof cover to prevent moisture from entering the power box. At the same time, when using the power box, try to avoid placing the power box in a humid or deep water place to avoid equipment damage or safety accidents caused by moisture entering.

[0034] The DC voltage output part of the power box includes an electronic voltage regulator, a full-bridge rectifier circuit, a DC voltage display, a voltage stabilizing capacitor and a terminal, which can be output by adjusting the electronic voltage regulator. In specific implementation, the voltage and current that the power box needs to output can be determined according to actual needs and equipment specifications. If multiple outputs are required, corresponding settings need to be made for each output. It should be noted that the wiring should be firm and reliable to avoid problems such as poor contact or short circuit.

[0035] In terms of specific layout, the input and output terminals are located in the upper part of the interface, which is convenient for users to connect to external power supplies and devices. The leakage protector is located in the middle to effectively ensure user safety. The socket, DC voltage display and electronic voltage regulator knob are located on the lower side of the interface, which is convenient for users to adjust and observe the output. The layout is clear and reasonable, and the position of each component is independent of each other, reducing the risk of misoperation and accidents. At the same time, the distance between the adjustment knob and the terminal is far, which improves the safety and reliability of the product.

[0036] Assemble and test the power supply box: Assemble and test the power supply box according to the design requirements and the above implementation measures. The test includes whether the output voltage and current meet the requirements, whether the power indicator light and leakage protector are working properly, etc.

[0037] Embodiment 2:

[0038] A special AC / DC power supply box for substation maintenance, comprising: five input terminals and five output ports are arranged on the upper surface of the power supply box, the five input terminals include: three three-phase input terminals A, B, C, a neutral line input terminal N, and a protective grounding line input terminal PE, the output ports are all equipped with independent leakage protectors and overload and short circuit protection functions, the leakage protectors are divided into one main leakage protector and five sub-leakage protectors;

[0039] The upper surface of the power box is provided with three three-phase output terminals a, b, c and a single-phase live wire terminal L;

[0040] The upper surface of the power box is provided with a DC voltage positive terminal V+ and a DC voltage negative terminal V-.

[0041] The upper surface of the power box is provided with six AC circuit breakers Q1, Q2, Q3, Q4, Q5, and Q6.

[0042] A 380V three-phase four-wire socket and a 220V three-wire socket are provided at the lower left of the upper surface of the power box;

[0043] The upper surface of the power box includes three power indicator lights LA, LB, and LC, which independently detect the three-phase power supply;

[0044] The adjustable DC voltage output part of the power supply box comprises: an electronic voltage regulator, a full-bridge rectifier circuit, a DC voltage display, a voltage stabilizing capacitor and a terminal;

[0045] The DC voltage display input terminal is connected to the electronic voltage regulator input terminal, and the output terminal is connected to both ends of the voltage stabilizing capacitor;

[0046] A handle is provided on the top of the power box cover, and two buckles are provided between the power box cover and the box body;

[0047] Based on the above settings, the specific connection method of the power box is as follows:

[0048] The three-phase input terminals A, B, C and the neutral line input terminal N are connected to the input terminal of the AC circuit breaker Q1, the output terminal of the AC circuit breaker Q1 is connected to the input terminals of the AC circuit breakers Q2 and Q3, the output terminal of the AC circuit breaker Q2 is connected to the 380V three-phase four-wire socket, the AC circuit breaker Q3 is connected to the three-phase output terminals a, b, c, and the output terminal of the neutral line input terminal N, the power indicator lights LA, LB, LC are respectively connected to the three-phase input terminals A, B, C and the neutral line input terminal N, the input terminal of the AC circuit breaker Q4 is connected to the output terminal of the AC circuit breaker Q1 and the three-phase input terminal C and the neutral line input terminal N, the output terminal of the AC circuit breaker Q4 is connected to the single-phase live wire terminal The line terminal L is connected to the neutral line input terminal N, the input end of the AC circuit breaker Q5 is connected to the protective earth line input terminal PE, the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q5 is connected to the 220V three-wire socket, the input end of the AC circuit breaker Q6 is connected to the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q6 is connected to the electronic voltage regulator, the output end of the electronic voltage regulator is connected to the AC side of the full-bridge rectifier circuit, the filter capacitor and the output terminal are connected to the DC side of the full-bridge rectifier circuit, the power supply end of the DC voltage display is connected to the output side of the AC circuit breaker Q6, and the measuring end of the DC voltage display is connected to the DC side of the full-bridge rectifier circuit.

[0049] An AC high-power thyristor is selected as the electronic voltage regulator to ensure the safety, stability and service life of the power box, and the full-bridge rectifier circuit is selected as the rectifier component.

[0050] The voltage stabilizing capacitor is connected in parallel on the DC output side to ensure the stability of the DC output voltage.

[0051] The DC voltage output part of the power box can output a DC voltage of 15V-220V by adjusting the knob of the electronic voltage regulator.

[0052] The current output DC voltage value is displayed on the DC voltage display.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A special AC and DC power supply box for substation maintenance, characterized in that: include: The upper surface of the power box is provided with five input terminals and five output ports, the five input terminals include: three three-phase input terminals A, B, C, a neutral line input terminal N, and a protective ground line input terminal PE, the output ports are all equipped with independent leakage protectors and overload and short circuit protection functions, the leakage protectors are divided into 1 main leakage protector and 5 sub-leakage protectors; The upper surface of the power box is provided with three three-phase output terminals a, b, c and a single-phase live wire terminal L; The upper surface of the power box is provided with a DC voltage positive terminal V+ and a DC voltage negative terminal V-. The upper surface of the power box is provided with six AC circuit breakers Q1, Q2, Q3, Q4, Q5, and Q6. A 380V three-phase four-wire socket and a 220V three-wire socket are provided at the lower left of the upper surface of the power box; The upper surface of the power box includes three power indicator lights LA, LB, and LC, which independently detect the three-phase power supply; The adjustable DC voltage output part of the power supply box comprises: an electronic voltage regulator, a full-bridge rectifier circuit, a DC voltage display, a voltage stabilizing capacitor and a terminal; The DC voltage display input terminal is connected to the electronic voltage regulator input terminal, and the output terminal is connected to both ends of the voltage stabilizing capacitor; A handle is provided on the top of the power box cover, and two buckles are provided between the power box cover and the box body; Based on the above settings, the specific connection method of the power box is as follows: The three-phase input terminals A, B, C and the neutral line input terminal N are connected to the input terminal of the AC circuit breaker Q1, the output terminal of the AC circuit breaker Q1 is connected to the input terminals of the AC circuit breakers Q2 and Q3, the output terminal of the AC circuit breaker Q2 is connected to the 380V three-phase four-wire socket, the AC circuit breaker Q3 is connected to the three-phase output terminals a, b, c, and the output terminal of the neutral line input terminal N, the power indicator lights LA, LB, LC are respectively connected to the three-phase input terminals A, B, C and the neutral line input terminal N, the input terminal of the AC circuit breaker Q4 is connected to the output terminal of the AC circuit breaker Q1 and the three-phase input terminal C and the neutral line input terminal N, the output terminal of the AC circuit breaker Q4 is connected to the single-phase live wire terminal The line terminal L is connected to the neutral line input terminal N, the input end of the AC circuit breaker Q5 is connected to the protective earth line input terminal PE, the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q5 is connected to the 220V three-wire socket, the input end of the AC circuit breaker Q6 is connected to the three-phase input terminal C and the neutral line input terminal N, the output end of the AC circuit breaker Q6 is connected to the electronic voltage regulator, the output end of the electronic voltage regulator is connected to the AC side of the full-bridge rectifier circuit, the filter capacitor and the output terminal are connected to the DC side of the full-bridge rectifier circuit, the power supply end of the DC voltage display is connected to the output side of the AC circuit breaker Q6, and the measuring end of the DC voltage display is connected to the DC side of the full-bridge rectifier circuit.

2. The AC / DC power supply box for substation maintenance according to claim 1 is characterized in that: An AC high-power thyristor is selected as the electronic voltage regulator to ensure the safety, stability and service life of the power box, and the full-bridge rectifier circuit is selected as the rectifier component.

3. The AC / DC power supply box for substation maintenance according to claim 1 is characterized in that: The voltage stabilizing capacitor is connected in parallel on the DC output side to ensure the stability of the DC output voltage.

4. The AC / DC power supply box for substation maintenance according to claim 1 is characterized in that: The DC voltage output part of the power box can output a DC voltage of 15V-220V by adjusting the knob of the electronic voltage regulator.

5. The AC / DC power supply box for substation maintenance according to claim 1 is characterized in that: The current output DC voltage value is displayed on the DC voltage display.

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