Embedded variable-frequency power supply device based on comprehensive utilization of energy

Abstract

The invention discloses an embedded variable-frequency power supply device based on comprehensive utilization of energy. The embedded variable-frequency power supply device comprises a control equipment module arranged in an operation room, and a data transmission module and an air circulation module which are arranged in a variable-frequency room, the data transmission module comprises a 2.4 GWIFI antenna, a control unit and an optical fiber unit, and the air circulation module comprises a first air circulation module composed of an air inlet and a first air outlet between the frequency conversion chamber and the operation chamber and a second air circulation module composed of a second air outlet. And the control equipment module comprises a display, a wireless controller and a light standby unit. Wireless communication is adopted, the wiring step is simplified, wireless connection between the test equipment and the operation platform is achieved, and the degree of freedom of arrangement of the test platform is improved; and the auxiliary module realizes cyclic utilization of waste heat, and the comprehensive utilization rate of energy is improved.

Description

Technical Field

[0001] The invention relates to the field of variable frequency power supplies, and in particular to an embedded variable frequency power supply device based on comprehensive energy utilization. Background Art

[0002] With the continuous development of national science and technology, economy and environment, the demand for electric energy from all walks of life is increasing day by day, which promotes the construction of power grid capacity expansion and the commissioning of a large number of power equipment. In order to ensure the safe commissioning of power grid equipment, a large number of handover tests need to be carried out to verify the reliability of the equipment. The withstand voltage test is a necessary part of the handover test. The withstand voltage test instruments include variable frequency power supply, excitation transformer, inductor, controller, etc., which are arranged in a scattered manner, resulting in many inconveniences such as complex wiring, complex transportation, and complex operation. It is urgent to design an integrated withstand voltage test device to simplify the operational complexity of the withstand voltage test and improve the portability of the equipment. As an important part of the integrated device, the variable frequency power supply needs to have corresponding characteristics and advantages to meet the needs of the integrated withstand voltage device.

[0003] The control signal of the traditional variable frequency power supply is controlled through optical fiber connection. The placement of the operating platform is limited by the location of the variable frequency power supply and the length of the optical fiber line and cannot be freely placed. The heat dissipation method of the traditional variable frequency power supply is to directly exchange heat with the outside world through a fan. This part of energy is not fully utilized. When the variable frequency power supply is integrated into a device, its contact area with the outside world is limited, and the problem of air circulation inside and outside the integrated device needs to be considered.

[0004] At present, there is no variable frequency power supply device that meets the above requirements, so it is necessary to design a variable frequency power supply device and supporting facilities that are easy to integrate. Summary of the invention

[0005] In view of the above problems, the present invention provides a variable frequency power supply device that can be embedded in a closed platform, which can be widely used in voltage withstand tests of small-capacity equipment of 66kV and above and voltage withstand tests of short cables, solves the problems of complex operation, complicated wiring, and difficult transportation in existing operation methods, and improves the comprehensive utilization rate of variable frequency power supply energy.

[0006] In order to achieve the above-mentioned object, the present invention provides an embedded variable frequency power supply device based on comprehensive utilization of energy, comprising: a control device module arranged in an operating room, and a data transmission module and an air circulation module arranged in a frequency conversion room;

[0007] The data transmission module includes: a 2.4G WIFI antenna, which is a control signal transmission device for data interaction with a control device module through WIFI wireless communication, and the output end of the 2.4G WIFI antenna is connected to the input end of a control unit; a control unit, which is integrated on a variable frequency power supply control mainboard, and which receives a WIFI signal from the control device module, identifies it, generates a corresponding control signal, and controls the main circuit of the variable frequency power supply; an optical fiber unit, the output end of which is connected to the input end of the control unit, and which serves as a backup data interaction mode during WIFI wireless communication failure and maintenance;

[0008] The air circulation module comprises: an air inlet and a first air outlet which are connected between the frequency conversion room and the operating room, the air inlet and the first air outlet constitute a first air circulation module and serve as a heat dissipation channel in winter, and the frequency conversion room heats the operating room; a second air outlet which is connected between the frequency conversion room and the outdoors, the second air outlet constitutes a second air circulation module and serves as a heat dissipation channel in summer;

[0009] The control device module includes: a display for displaying the temperature and charging status of the variable frequency power supply, the display interacts with the sensor of the protection module through Bluetooth communication; a wireless controller, the wireless controller issues a control instruction for changing the voltage value of the variable frequency power supply to the control unit through WIFI wireless communication; and a light backup unit corresponding to the optical fiber unit, the input end of the light backup unit is connected to the output end of the wireless controller.

[0010] In a preferred embodiment, a protection module is further provided in the frequency conversion room, and the protection module includes a temperature sensor and a charge sensor for real-time monitoring of the temperature and charge condition of the frequency conversion room.

[0011] In a preferred embodiment, the wireless controller has a built-in emergency braking program, which is activated when the frequency converter box or the operating box fails or the temperature is too high, shielding manual adjustment and automatically reducing the voltage value of the frequency converter power supply.

[0012] The beneficial effects of the present invention are as follows: the device adopts wireless communication, simplifies the wiring steps, realizes the wireless connection between the test equipment and the operating platform, and improves the freedom of layout of the test platform; the auxiliary module realizes the recycling of waste heat and improves the comprehensive utilization rate of energy; the device protection module provides the real-time working status of the variable frequency power supply, which is convenient for multi-directional monitoring; the device emergency operation device provides a faster fault response than humans, reduces the probability of possible damage to the equipment and operators when a fault occurs, and improves the safety of the device; the variable frequency power supply is integrated in the closed voltage withstand test platform, and there is no need to carry it separately during transportation, which improves the transportation efficiency and shortens the transportation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the frequency conversion cabinet and the control device of the present invention;

[0014] Figure 2 It is a schematic diagram of the air circulation module of the present invention;

[0015] Figure 3 It is a working schematic diagram of the practical application of the present invention. DETAILED DESCRIPTION

[0016] Embodiment 1:

[0017] The present invention sets a separate partition space for the variable frequency power supply, which is composed of a data transmission module, an air circulation module and a protection module. The data transmission module is composed of a 2.4G WIFI antenna, a control unit and an optical fiber unit. The 2.4G WIFI antenna is a control signal transmission device, which uses WIFI transmission to interact with the control device module. The control unit is integrated on the variable frequency power supply control main board, and after receiving the WIFI signal, it identifies and generates a corresponding control signal to control the main circuit of the variable frequency power supply. The optical fiber unit is used as a backup unit and as a reservation for wired control. The basic functions of the variable frequency power supply can be retained during the failure and maintenance of the wireless control unit.

[0018] The air circulation module consists of 2 air outlets, 1 air inlet, ventilation ducts, 16 fans, and two blowers. The 16 fans are directly connected to the frequency conversion cabinet to achieve energy exchange between the frequency conversion power supply and the frequency conversion room. The 2 air inlets and 1 air inlet constitute two sets of air circulation modules. One set is the air circulation between the frequency conversion room and the operating room, which serves as a heat dissipation channel in winter and can heat the operating room; the other set is the air circulation between the frequency conversion room and the outdoors, which serves as heat dissipation in summer. The two sets of air circulation modules are backup for each other and can be turned on at the same time when heat dissipation is insufficient. The blowers are placed at the two air outlets to assist in air exchange. At the same time, control switches are designed for each air inlet, air outlet, and blower, which can manually control the opening and closing of the corresponding parts.

[0019] The protection module consists of sensors, displays, and emergency braking programs. The sensors include live sensors and temperature sensors, which monitor the temperature and live conditions of the frequency conversion room in real time through the display. At the same time, the output voltage and frequency can be displayed on the display through Bluetooth communication with the operation box, which is convenient for the guardian to monitor. When the frequency conversion operation box fails or the temperature is too high, the emergency braking program will be activated, manual adjustment will be blocked, the output voltage will be automatically reduced, and the monitorable fault cause will be prompted through the display.

[0020] Figure 1This is a schematic diagram of the structure of the variable frequency power supply and the control device. A wireless signal transceiver is provided between the variable frequency power supply and the control device, and signal interaction is achieved through a 2.4G WIFI antenna. The variable frequency power supply receives the start-up, voltage regulation, and frequency modulation signals of the control unit and responds, and returns the real-time output voltage, frequency and other signals of the variable frequency power supply to the control device. The working condition of the variable frequency power supply can be visually observed through the display screen. At the same time, the light control interface is retained on the variable frequency power supply and the control device, and the control signal can be transmitted through light. The optical fiber interface and the wireless transmission module are designed to be mutually related modules. If one of the two modules is in working state, the other module is automatically disabled.

[0021] Figure 2 This is a schematic diagram of the air circulation module. The frequency conversion room has an independent space relative to the operation room and other equipment. The air outlet 1 and the air inlet constitute the frequency conversion room-operation room hot and cold air circulation, which is mainly used in winter and can achieve heating of the operation room while dissipating heat. The air outlet 2 and the air inlet constitute the frequency conversion room-outdoor air circulation module, which is mainly used in summer. The air flow can be accelerated by opening the door of the operation room, while dissipating heat, providing a good ventilation environment for the operation room. At the same time, the separately designed frequency conversion room and air circulation module reduce the impact of the heat generated by the variable frequency power supply on other equipment.

[0022] Figure 3 This is the application mode of the present invention in a closed platform and in practical applications. The connection between the frequency converter cabinet and the excitation transformer can be fixedly connected, and the transformation ratio can be adjusted by the excitation design, which reduces the number of wiring and the complexity of operation. The corresponding air circulation module can be controlled by operating the opening and closing of each air inlet and blower. The test personnel only need to complete the wiring once, and the subsequent operations only need to be completed on the control device module.

[0023] Embodiment 2:

[0024] An embedded variable frequency power supply device based on comprehensive energy utilization, comprising: a control device module arranged in an operation room, and a data transmission module and an air circulation module arranged in a frequency conversion room;

[0025] The data transmission module includes: a 2.4G WIFI antenna, which is a control signal transmission device for data interaction with a control device module through WIFI wireless communication, and the output end of the 2.4G WIFI antenna is connected to the input end of a control unit; a control unit, which is integrated on a variable frequency power supply control mainboard, and which receives a WIFI signal from the control device module, identifies it, generates a corresponding control signal, and controls the main circuit of the variable frequency power supply; an optical fiber unit, the output end of which is connected to the input end of the control unit, and which serves as a backup data interaction mode during WIFI wireless communication failure and maintenance;

[0026] The air circulation module comprises: an air inlet and a first air outlet which are connected between the frequency conversion room and the operating room, the air inlet and the first air outlet constitute a first air circulation module and serve as a heat dissipation channel in winter; a second air outlet which is connected between the frequency conversion room and the outdoors, the second air outlet constitutes a second air circulation module and serves as a heat dissipation channel in summer;

[0027] The control device module includes: a display for displaying the temperature and charging status of the variable frequency power supply, the display interacts with the sensor of the protection module through Bluetooth communication; a wireless controller, the wireless controller issues a control instruction for changing the voltage value of the variable frequency power supply to the control unit through WIFI wireless communication; and a light backup unit corresponding to the optical fiber unit, the input end of the light backup unit is connected to the output end of the wireless controller.

[0028] A protection module is also provided in the frequency conversion room, and the protection module includes a temperature sensor and a charge sensor for real-time monitoring of the temperature and charge condition of the frequency conversion room.

[0029] The wireless controller is built with an emergency braking program, which is activated when a frequency conversion box or an operating box fails or the temperature is too high, shields manual adjustment, and automatically reduces the voltage value of the frequency conversion power supply.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An embedded variable frequency power supply device based on comprehensive energy utilization, characterized in that: It includes: A control device module arranged in the operating room and a data transmission module and an air circulation module arranged in the frequency conversion room; The data transmission module includes: a 2.4G WIFI antenna, which is a control signal transmission device for data interaction with a control device module through WIFI wireless communication, and the output end of the 2.4G WIFI antenna is connected to the input end of a control unit; a control unit, which is integrated on a variable frequency power supply control mainboard, and which receives a WIFI signal from the control device module, identifies it, generates a corresponding control signal, and controls the main circuit of the variable frequency power supply; an optical fiber unit, the output end of which is connected to the input end of the control unit, and which serves as a backup data interaction mode during WIFI wireless communication failure and maintenance; The air circulation module comprises: an air inlet and a first air outlet which are connected between the frequency conversion room and the operating room, the air inlet and the first air outlet constitute a first air circulation module and serve as a heat dissipation channel in winter; a second air outlet which is connected between the frequency conversion room and the outdoors, the second air outlet constitutes a second air circulation module and serves as a heat dissipation channel in summer; The control device module includes: a display for displaying the temperature and charging status of the variable frequency power supply, the display interacts with the sensor of the protection module through Bluetooth communication; a wireless controller, the wireless controller issues a control instruction for changing the voltage value of the variable frequency power supply to the control unit through WIFI wireless communication; and a light backup unit corresponding to the optical fiber unit, the input end of the light backup unit is connected to the output end of the wireless controller.

2. The embedded variable frequency power supply device based on comprehensive energy utilization according to claim 1 is characterized in that: A protection module is also provided in the frequency conversion room, and the protection module includes a temperature sensor and a charge sensor for real-time monitoring of the temperature and charge condition of the frequency conversion room.

3. The embedded variable frequency power supply device based on comprehensive energy utilization according to claim 1 is characterized in that: The wireless controller is built with an emergency braking program, which is activated when a frequency conversion box or an operating box fails or the temperature is too high, shields manual adjustment, and automatically reduces the voltage value of the frequency conversion power supply.

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