Energy-saving frequency converter for box-type substation

Abstract

The utility model discloses an energy-saving frequency converter for a box-type substation, which comprises a box body, a frequency converter is arranged in the box body, a plurality of radiating fins are fixedly arranged on two sides of the frequency converter, and a load detection module, a data processing module and an intelligent control module are arranged in the box body. And a user interface module is arranged outside the box body. Through the arrangement of the air inlet, the air outlet and the cooling fins, normal heat dissipation of the frequency converter can be ensured, real-time monitoring and intelligent identification of the load state of the motor can be realized through integration of equipment such as the current sensor and the voltage sensor, operation data of the motor can be timely acquired, load change can be analyzed, faults such as overload and overheating can be prevented, and the service life of the motor can be prolonged. And through cooperation of the microcontroller 2 and the frequency converter, intelligent control and self-adaptive adjustment of the operation parameters of the motor are realized, and through arrangement of the relay, the motor can be powered off in time.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field, concretely is a kind of energy-saving frequency converter for box-type substation. BACKGROUND

[0002] Box-type substation is an integrated power equipment, usually including transformer, switch device and distribution facility, widely used in urban power distribution and industrial power supply. With the increase of power demand and the access of renewable energy, energy-saving frequency converter as a kind of efficient power regulating device gradually becomes an important part of box-type substation. Energy-saving frequency converter can accurately control the speed of motor by adjusting the power frequency and voltage of motor, so as to realize energy efficiency optimization and dynamic load management. This technology not only reduces energy consumption, but also improves the stability and reliability of the system. In addition, energy-saving frequency converter can improve power quality, reduce harmonic interference, prolong equipment service life, adapt to the demand of modern power system for efficient and intelligent equipment. Therefore, the box-type substation combined with energy-saving frequency converter has important significance in promoting the intelligentization and green development of power system.

[0003] But the prior art still has great deficiencies, such as:

[0004] In the prior art, box-type substation often realizes the adjustment of motor and power through frequency converter, but in the process of use, frequency converter will heat up due to long time use, thus causing failure, and in the prior art, the adjustment of frequency converter is realized by manual operation, so it is impossible to realize real-time adjustment of the speed of motor and other parameters. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an energy-saving frequency converter for box-type substation to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] An energy-saving frequency converter for box-type substation, comprising a box body, a frequency converter is arranged inside the box body, a plurality of heat dissipation fins are fixedly arranged on both sides of the frequency converter, and the heat dissipation fins are arranged at intervals;

[0008] An air inlet and an air outlet are formed on the box body, the air inlet and the air outlet correspond to the intervals between the heat dissipation fins, a filter plate is arranged on the outer wall of the box body on the side of the air inlet and the air outlet, and the filter plate is fixed on the outer wall of the box body by a nut;

[0009] A load detection module, a data processing module and an intelligent control module are arranged inside the box body, and a user interface module is arranged outside the box body.

[0010] The load detection module transmits detection data to a data processing module, the data processing module is signal connected with an intelligent control module, and the user interface module is signal connected with the intelligent control module.

[0011] Preferably, the load detection module comprises a current sensor, a voltage sensor, a power factor sensor, a rotating speed sensor and a temperature sensor.

[0012] Preferably, the data processing module comprises an analog-to-digital converter, a microprocessor, a digital signal processor and a memory.

[0013] The load detection module is signal connected with the analog-to-digital converter, the analog-to-digital converter is signal connected with the microprocessor, the microprocessor is connected with the digital signal processor, and the microprocessor is connected with the memory.

[0014] Preferably, the intelligent control module comprises a microcontroller, a relay and a frequency converter.

[0015] The microcontroller is connected with the data processing module, the microcontroller is signal connected with the frequency converter and the relay, and the relay is connected with a power line of the frequency converter.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. Through the setting of the air inlet, the air outlet and the radiating fin, the frequency converter can be normally cooled, and through the setting of the filter plate, the dust in the box body is prevented from entering and affecting the operation of the equipment.

[0018] 2. Through the integration of the current sensor, the voltage sensor and other equipment, the real-time monitoring and intelligent identification of the motor load state are realized, the operation data of the motor can be acquired in time, the load change is analyzed, so that the motor is ensured to operate in a safe and efficient working state, the overload, overheating and other faults are prevented, and the reliability of the equipment is improved.

[0019] 3. Through the cooperation of the microcontroller and the frequency converter, the intelligent control and self-adaptive adjustment of the motor operation parameters are realized, and through the setting of the relay, the motor can be powered off in time, and the overload is further prevented. DRAWINGS

[0020] Figure 1 It is a box three-dimensional structure schematic view of the utility model;

[0021] Figure 2 It is a frequency converter three-dimensional structure schematic view of the utility model;

[0022] Figure 3 It is a control system framework drawing of the utility model;

[0023] Figure 4The utility model discloses load detection module framework graph for the utility model;

[0024] Figure 5 The utility model discloses data processing module framework graph for the utility model;

[0025] Figure 6 The utility model discloses intelligent control module framework graph for the utility model.

[0026] In the drawing: 1, box body;2, frequency converter;3, fin;4, air inlet;5, air outlet;6, filter plate;7, nut;8, load detection module;81, current sensor;82, voltage sensor;83, power factor sensor;84, speed sensor;85, temperature sensor;9, data processing module;91, analog-digital converter;92, microprocessor;93, digital signal processor;94, memory;10, intelligent control module;101, microcontroller;102, relay;11, user interface module. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of the utility model protection.

[0028] Please refer to Figures 1-6 The utility model provides a technical scheme:

[0029] A kind of energy-saving frequency converter for box-type substation, including box body 1, frequency converter 2 is arranged in the inside of box body 1, several fins 3 are fixedly arranged on the both sides of frequency converter 2, and the interval is set between fin 3;

[0030] Air inlet 4 and air outlet 5 are opened on box body 1, air inlet 4 and air outlet 5 are all corresponding with the interval between fin 3, filter plate 6 is arranged on the outer wall of air inlet 4 and air outlet 5 side of box body 1, and filter plate 6 is fixed on the outer wall of box body 1 by nut 7;

[0031] Air inlet 4 and air outlet 5 in the embodiment are arranged at the position of the opposite side of box body 1, by the flow guiding of air inlet 4 and air outlet 5, gas can enter the inside of box body 1, and the heat on fin 3 is taken away by the interval between fin 3, to realize the cooling of frequency converter 2, prevent frequency converter 2 temperature from being too high;

[0032] Load detection module 8, data processing module 9 and intelligent control module 10 are arranged in the inside of box body 1, and user interface module 11 is arranged outside box body 1;

[0033] The load detection module 8 transmits the detection data to the data processing module 9, the data processing module 9 is in signal connection with the intelligent control module 10, and the user interface module 11 is in signal connection with the intelligent control module 10.

[0034] In this embodiment, the load detection module 8 monitors the working state of the motor in real time, including current, voltage, power factor and rotating speed and the like, collects real-time data of the load, and transmits the monitoring data to the data processing module through the sensor;

[0035] The data processing module 9 analyzes the data collected by the load detection module 8 to determine the current load characteristics, and is connected with the load detection module 8 and the intelligent control module 10, receives the monitoring data and feeds back the processing result to the control module;

[0036] The intelligent control module 10 dynamically adjusts the output frequency and voltage of the frequency converter 2 according to the output of the data processing module 9, is directly connected with the data processing module 9, and is connected with the driving part of the frequency converter 2 through the control signal;

[0037] The user interface module 11 is connected with the control module through the data interface to realize the monitoring and operation of the system;

[0038] The load detection module 8 includes a current sensor 81, a voltage sensor 82, a power factor sensor 83, a rotating speed sensor 84 and a temperature sensor 85.

[0039] The current sensor 81 is used for monitoring the current value of the motor in real time, the current sensor 81 is directly connected to the power supply line of the motor, the voltage sensor 82 is used for monitoring the input voltage of the motor in real time, the voltage sensor 82 is connected to the power supply line, the power factor sensor 83 measures the power factor of the motor to evaluate the energy efficiency of the motor operation, the power factor sensor 83 is connected with the current sensor 81 and the voltage sensor 82, and directly transmits the calculation result to the data processing module 9, the rotating speed sensor 84 is used for monitoring the rotating speed of the motor, the rotating speed sensor 84 is installed on the motor shaft, and the output rotating speed signal is connected to the data processing module 9 through the pulse signal line; the temperature sensor 85 monitors the temperature inside the motor and the frequency converter 2.

[0040] The data processing module 9 includes an analog-to-digital converter 91, a microprocessor 92, a digital signal processor 93 and a memory 94;

[0041] The analog-to-digital converter 91 converts the analog signals of each sensor into digital signals for processing by the microprocessor 92, which is responsible for receiving data from each sensor, performing calculation and analysis tasks, and adjusting output control signals according to algorithms, the digital signal processor 93 is a processor specifically designed for real-time digital signal processing, which performs complex algorithm processing on the data from the microprocessor 92, such as frequency analysis, filtering, etc., to further optimize load identification, the memory 94 is used to temporarily store the data and programs required by the microprocessor 92 during runtime, such as historical load data;

[0042] The load detection module 8 is signal connected with the analog-to-digital converter 91, the analog-to-digital converter 91 and the microprocessor 92 are signal connected, the microprocessor 92 and the digital signal processor 93 are connected, and the microprocessor 92 and the memory 94 are connected.

[0043] The intelligent control module includes a microcontroller 101, a relay 102 and a frequency converter 2;

[0044] The microcontroller 101 is connected with the data processing module 9, the microcontroller 101 is signal connected with the frequency converter 2 and the relay 102, and the relay 102 is connected with the power line of the frequency converter 2;

[0045] The microcontroller 101 is the core of the intelligent control module 10, responsible for receiving control instructions from the data processing module, executing corresponding control logic, and generating control signals to adjust the output of the frequency converter, connected to the data processing module through a data bus such as I2C, SPI or UART, the frequency converter 2 adjusts the frequency and voltage of the motor according to the control signal output by the microcontroller 101, realizing the speed and torque control of the motor, the control end of the frequency converter 2 is connected to the output end of the microcontroller, and the input end of the motor is connected to the frequency converter 2, ensuring that the microcontroller 101 can control the operation of the motor, the relay 102 is used for start-stop control or fault protection of the motor, and can cut off the power supply when needed, ensuring the safety of the equipment, the relay 102 is connected with the control output end of the microcontroller 101, and is connected with the frequency converter 2 and the power line, ensuring that direct control of the motor can be realized.

[0046] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An energy-saving frequency converter for a prefabricated substation, comprising a housing (1), characterized in that: The housing (1) is equipped with a frequency converter (2), and several heat sinks (3) are fixedly installed on both sides of the frequency converter (2), with the heat sinks (3) spaced apart. The housing (1) is provided with an air inlet (4) and an air outlet (5), and the air inlet (4) and the air outlet (5) are respectively corresponding to the interval between the heat sink (3). A filter plate (6) is provided on the outer wall of the housing (1) located on the side of the air inlet (4) and the air outlet (5). The filter plate (6) is fixed to the outer wall of the housing (1) by nuts (7). The box (1) is equipped with a load detection module (8), a data processing module (9) and an intelligent control module (10) inside, and a user interface module (11) is equipped on the outside of the box (1). The load detection module (8) transmits the detection data to the data processing module (9), the data processing module (9) is connected to the intelligent control module (10) by signal, and the user interface module (11) is connected to the intelligent control module (10) by signal.

2. The energy-saving frequency converter for a prefabricated substation according to claim 1, characterized in that: The load detection module (8) includes a current sensor (81), a voltage sensor (82), a power factor sensor (83), a speed sensor (84), and a temperature sensor (85).

3. The energy-saving frequency converter for a prefabricated substation according to claim 2, characterized in that: The data processing module (9) includes an analog-to-digital converter (91), a microprocessor (92), a digital signal processor (93), and a memory (94). The load detection module (8) is signal-connected to the analog-to-digital converter (91), the analog-to-digital converter (91) is signal-connected to the microprocessor (92), the microprocessor (92) is connected to the digital signal processor (93), and the microprocessor (92) is connected to the memory (94).

4. The energy-saving frequency converter for a prefabricated substation according to claim 3, characterized in that: The intelligent control module (10) includes a microcontroller (101), a relay (102), and a frequency converter (2). The microcontroller (101) is connected to the data processing module (9), and the microcontroller (101) is connected to the frequency converter (2) and the relay (102) via signal connection. The relay (102) is connected to the power supply line of the frequency converter (2).

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