CN214591138U

CN214591138U - Voltage-stabilized power supply circuit of controller of circuit breaker detection device

Info

Publication number: CN214591138U
Application number: CN202120353948.0U
Authority: CN
Inventors: 郑继辉; 岳峰; 冯程; 何杰; 杨亮; 张云; 罗洪宏; 张坤; 刘校豪
Original assignee: Yuxi Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Yuxi Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-02
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a constant voltage power supply circuit of circuit breaker detection device's controller. The LED lamp comprises a wiring terminal J4, a first capacitor, an LM2576T chip, a diode V1, an inductor L1, a capacitor DA, a capacitor C17 and a capacitor C18; the connection terminal J4 and the first capacitor are connected in parallel and connected between a 24V power supply and the ground, a pin 1 of the LM2576T chip is connected with the 24V power supply, a pin 2 is respectively connected with a cathode of the diode V1 and one end of the inductor L1, the other end of the inductor L1 is respectively connected with a pin 4 of the LM2576T chip, one end of the capacitor DA, one end of the capacitor C17 and one end of the capacitor C18 and serves as the 5V power supply, and an anode of the diode V1, a pin 3 of the LM2576T chip, a pin 6 of the LM2576T chip, the other end of the capacitor DA, the other end of the capacitor C17 and the other end of the capacitor C18 are all grounded. The utility model discloses the stable performance is reliable, has effectively reduced because the power problem makes whole circuit cause the risk of damage.

Description

Voltage-stabilized power supply circuit of controller of circuit breaker detection device

Technical Field

The utility model provides a constant voltage power supply circuit of circuit breaker detection device's controller belongs to circuit breaker control technical field.

Background

High voltage circuit breakers are basic components of electrical power systems and play a vital role in electrical power systems. The automatic switching-in or switching-out of the line or the electric equipment in the normal operation state is ensured, and meanwhile, when the electric power system has a fault, the line or the electric equipment of the fault part is quickly cut off from the power grid through the relay protection device. The state of the high-voltage circuit breaker and the reliability of the high-voltage circuit breaker are important factors for determining the safe and normal operation of the power system, and the service life of the high-voltage circuit breaker is generally 20-40 years. With the increase of the service time of the high-voltage circuit breaker, the high-voltage circuit breaker is maintained in time, and the overhaul is very necessary.

At home and abroad, common maintenance modes for high-voltage electrical equipment, particularly high-voltage circuit breakers, include three modes of after-the-fact maintenance, regular maintenance and state maintenance.

(1) And (5) overhauling afterwards. The power equipment is maintained after the power equipment breaks down, namely the power equipment is maintained when the power equipment is broken, and the power equipment is not maintained when the power equipment is broken. The method not only shortens the normal service life of the equipment, but also influences the normal production of the whole system, and when some important equipment in the power system breaks down, the equipment cannot be repaired in time, the large accident range is seriously expanded, and the whole system is influenced.

(2) And (5) regular maintenance. The method is characterized in that a regular maintenance plan is made according to the operation condition of the power equipment, and once the power equipment runs for a preset time period, the power equipment is stopped to be maintained whether a fault occurs or not. Namely, the repair is required. The regular maintenance is obviously improved compared with the after-service maintenance, the occurrence frequency of accidents can be reduced, but the method is scientific, has no pertinence and is maintained blindly, the utilization rate of equipment is reduced, the waste of manpower, financial resources and material resources is 7-8), the maintenance quality of the power equipment is reduced, and particularly, the fault is easy to occur in the interval of two times of maintenance time for part of important equipment with long service period and high load rate, so that the normal operation of the whole power system is influenced.

(3) And (5) state maintenance. With the rapid development of computer technology, sensor technology, optical fiber technology and information processing technology, a new overhaul technology, namely state overhaul, appears. The condition maintenance refers to a mode of judging the abnormality of the equipment according to the equipment condition information provided by the advanced condition monitoring and fault diagnosis technology, predicting the potential fault of the equipment and performing maintenance before the fault occurs. That is, a maintenance plan is arranged according to the state of the equipment, and the equipment maintenance is performed. Stateful inspection has two main functions: firstly, the defects of the equipment are discovered in time, and the trouble is prevented; and secondly, convenience is provided for the operation management of the main equipment, a basis is provided for the overhaul, and the waste of manpower, material resources and financial resources is effectively reduced. As the state overhaul technology is still immature and still in the development stage, China basically adopts an overhaul mode combining regular overhaul and state overhaul.

High voltage circuit breaker detection device is the basis and the prerequisite that the state was overhauld to the circuit breaker realization, it is mainly through advanced sensor technology, detection technology and information processing technique etc., the behavior of each part of analysis circuit breaker, detect for a long time the important parameter of circuit breaker, can provide the real-time running state of current equipment, judge the trouble sign that has or not to exist, not only provide data and experience for the maintenance of high voltage circuit breaker, and the maintenance cycle of equipment and the utilization ratio of equipment have been improved, the cost of overhauing and maintaining has important economic meaning.

The controller of the high-voltage circuit breaker detection device is a master device for controlling the starting, speed regulation, braking and reversing of the detection device. The system consists of a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller, and is a decision mechanism for issuing commands, namely, the decision mechanism is used for coordinating and commanding the operation of the whole computer system. It is the core component of the detection device. Currently, the main problems of the regulated power supply circuit of the circuit breaker detection device controller are: the normal operation of the whole circuit breaker detection device may be affected due to the problems of unreliable power supply operation and the like (overheating problems exist), and the risk of damaging the whole circuit exists.

Disclosure of Invention

To the above problem, the utility model discloses constant voltage power supply circuit to high voltage circuit breaker detection device's controller has been reformed transform.

The utility model adopts the technical scheme that: a voltage-stabilized power supply circuit of a controller of a circuit breaker detection device comprises a connecting terminal J4, a first capacitor, an LM2576T chip, a diode V1, an inductor L1, a capacitor DA, a capacitor C17 and a capacitor C18; the connecting terminal J4 and the first capacitor are connected in parallel and connected between a 24V power supply and the ground, a pin 1 of the LM2576T chip is connected with the 24V power supply, a pin 2 of the LM2576T chip is connected with the cathode of the diode V1 and one end of the inductor L1 respectively, the other end of the inductor L1 is connected with a pin 4 of the LM2576T chip, one end of the capacitor DA, one end of the capacitor C17 and one end of the capacitor C18 respectively and serves as the 5V power supply, and the anode of the diode V1, the pin 3 of the LM2576T chip, the pin 6 of the LM25 2576T chip, the other end of the capacitor DA, the other end of the capacitor C17 and the other end of the capacitor C18 are all grounded.

Further, the chip further comprises a capacitor C, AMS1117, a capacitor C24, and a capacitor C23; one end of the capacitor C is respectively connected with a 3 pin of the AMS1117 chip and a 5V power supply; the other end of the capacitor C is grounded and the pin 1 of the AMS1117 chip, the pin 2 and the pin 4 of the AMS1117 chip are respectively connected with one end of the capacitor C24, one end of the capacitor C23 and a 3.3V power supply, and the other end of the capacitor C24 and the other end of the capacitor C23 are grounded.

The utility model has the advantages that: the utility model discloses constant voltage power supply circuit is inside to have contained perfect protection circuit, current limiting circuit and heat and has shut off circuit etc. and the stable performance is reliable, has effectively reduced because the power problem makes whole circuit cause the risk of damage.

Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Fig. 1 exemplarily shows a schematic structural diagram of a 24V to 5V voltage stabilizing circuit of a controller of a circuit breaker detection device according to the present invention;

fig. 2 exemplarily shows a schematic structural diagram of a 5V to 3V voltage stabilizing circuit of a controller of the circuit breaker detection device of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The following describes in detail a regulated power supply circuit of a controller of a circuit breaker detection apparatus according to the present invention with reference to the accompanying drawings.

Example 1: as shown in fig. 1-2, a voltage-stabilized power supply circuit of a controller of a circuit breaker detection device includes a connection terminal J4, a first capacitor, an LM2576T chip, a diode V1, an inductor L1, a capacitor DA, a capacitor C17, and a capacitor C18; the connecting terminal J4 and the first capacitor are connected in parallel and connected between a 24V power supply and the ground, a pin 1 of the LM2576T chip is connected with the 24V power supply, a pin 2 of the LM2576T chip is connected with the cathode of the diode V1 and one end of the inductor L1 respectively, the other end of the inductor L1 is connected with a pin 4 of the LM2576T chip, one end of the capacitor DA, one end of the capacitor C17 and one end of the capacitor C18 respectively and serves as the 5V power supply, and the anode of the diode V1, the pin 3 of the LM2576T chip, the pin 6 of the LM25 2576T chip, the other end of the capacitor DA, the other end of the capacitor C17 and the other end of the capacitor C18 are all grounded.

The utility model discloses a theory of operation is:

the power supply of the controller not only needs to supply power to each chip on the board, but also provides 24V voltage for the amplifier, and a resistor of about 2K is connected in series when the 24V power supply pin of the amplifier is connected, so that the current limiting effect is achieved.

The operating voltage range of the STM32F4 control chip is 1.8V to 3.6V, with a typical value of 3.3V being typical. The AMS1117-3.3V chip is selected to be used as a voltage stabilizing chip for converting 5V into 3.3V, and stable voltage is provided for the main control chip. The chip is frequently used in the design of an embedded voltage stabilizing circuit, and is packaged by a patch, so that the occupied area is reduced. A fine adjustment circuit is designed in the chip, and the error of the reference voltage is controlled within 1.5%. In order to obtain a purer direct current voltage, the input and output voltages can be filtered through a small-capacity capacitor. A part of chips in the control circuit need 5V voltage for power supply, and a 24V-to-5V chip of the LM2576T is selected as a main component of the voltage stabilizing circuit in consideration of 24V voltage provided for the amplifier. The internal protection circuit, the current limiting circuit, the thermal shutdown circuit and the like are perfect, the performance is stable and reliable, and the risk of damage to the whole circuit caused by power supply problems is effectively reduced. Under the corresponding voltage protection, the fluctuation range of the output voltage can be controlled within 1 percent. The main circuit design of the power supply is shown in fig. 1 and 2;

the capacitor in the circuit is used for voltage filtering, and the influence of current steep rise at the moment of voltage cut-off can be reduced. IN5819 is a schottky diode, has good high frequency performance, and functions as a free-wheeling IN the circuit. The inductor functions to store circuit energy.

The above-described embodiments can be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.

The above embodiments are merely for illustrating the technical solutions of the present invention and are not to be construed as limiting, and the present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all the modifications and equivalents should be covered by the scope of the claims of the present invention.

Claims

1. A constant voltage power supply circuit of circuit breaker detection device's controller which characterized in that: the LED lamp comprises a wiring terminal J4, a first capacitor, an LM2576T chip, a diode V1, an inductor L1, a capacitor DA, a capacitor C17 and a capacitor C18; the connecting terminal J4 and the first capacitor are connected in parallel and connected between a 24V power supply and the ground, a pin 1 of the LM2576T chip is connected with the 24V power supply, a pin 2 of the LM2576T chip is connected with the cathode of the diode V1 and one end of the inductor L1 respectively, the other end of the inductor L1 is connected with a pin 4 of the LM2576T chip, one end of the capacitor DA, one end of the capacitor C17 and one end of the capacitor C18 respectively and serves as the 5V power supply, and the anode of the diode V1, the pin 3 of the LM2576T chip, the pin 6 of the LM25 2576T chip, the other end of the capacitor DA, the other end of the capacitor C17 and the other end of the capacitor C18 are all grounded.

2. A stabilized voltage power supply circuit of a controller of a circuit breaker detecting device according to claim 1, characterized in that: the chip further comprises a capacitor C, AMS1117 chip, a capacitor C24 and a capacitor C23; one end of the capacitor C is respectively connected with a 3 pin of the AMS1117 chip and a 5V power supply; the other end of the capacitor C is grounded and the pin 1 of the AMS1117 chip, the pin 2 and the pin 4 of the AMS1117 chip are respectively connected with one end of the capacitor C24, one end of the capacitor C23 and a 3.3V power supply, and the other end of the capacitor C24 and the other end of the capacitor C23 are grounded.