CN207354054U - The electric power system of online power equipment monitoring system - Google Patents

Abstract

The power supply system of an online power equipment monitoring system provided by the utility model includes: an energy transformer CT1, a rectifier circuit Z1, an overvoltage protection circuit, a first power supply circuit, a second power supply circuit, a backup power supply and a processing circuit; The two ends of the induction coil of the energy transformer CT1 are respectively connected to the positive input terminal and the negative input terminal of the rectification circuit Z1, the positive output terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit, and the negative output terminal of the rectification circuit Z1 terminal grounding, the first power supply circuit outputs 12V direct current, the output terminal of the first power supply circuit is also connected with the input terminal of the second power supply circuit, the second power supply circuit outputs 5V direct current, the input terminal of the backup power supply Connected to the output end of the second power supply circuit, the output end of the backup power supply is connected to the processing circuit point, the backup power supply is also connected to the processing circuit in communication, and the overvoltage protection circuit is arranged between the rectification circuit and the first power supply circuit The control output terminal of the processing circuit is also connected to the overvoltage protection circuit, and can output two kinds of stable direct current.

Description

Power supply system of online power equipment monitoring system

technical field

The utility model relates to a power supply system, in particular to a power supply system of an online power equipment monitoring system.

Background technique

With the development of social production and life, people have higher and higher requirements for the stability of the power system. Therefore, in order to ensure the stable operation of various equipment in the power system, it is necessary to control the equipment in the power system, such as transmission lines, circuit breakers, and insulators. In the prior art, the monitoring of power equipment is mainly on-line, using various sensors to monitor data, and then uploading to the monitoring host through a microprocessor. For the detection system of power equipment in a substation, its Electricity can also be guaranteed in terms of stability and diversity, but for relatively remote places, the existing power supply devices have poor stability and a single output, which is difficult to meet the needs of modern monitoring systems. Moreover, due to poor stability , requires operation and maintenance workers to check and repair frequently, which will increase the labor cost.

Therefore, in order to solve the above technical problems, it is urgent to propose a new power supply system.

Utility model content

In view of this, the power supply system of an online power equipment monitoring system provided by the utility model can provide 12V and 5V direct current for the online monitoring system, so as to meet the electricity demand of various sensors of the modern monitoring system, and the power supply system It can achieve good protection itself, so as to ensure the safety of electrical equipment and effectively improve its own stability, avoiding additional labor costs caused by power supply maintenance.

The power supply system of an online power equipment monitoring system provided by the utility model includes: an energy transformer CT1, a rectifier circuit Z1, an overvoltage protection circuit, a first power supply circuit, a second power supply circuit, a backup power supply and a processing circuit;

The two ends of the induction coil of the energy-taking transformer CT1 are respectively connected to the positive input terminal and the negative input terminal of the rectification circuit Z1, the positive output terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit, and the negative input terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit. The output terminal is grounded, the first power supply circuit outputs 12V direct current, the output terminal of the first power supply circuit is also connected to the input terminal of the second power supply circuit, the second power supply circuit outputs 5V direct current, and the input of the backup power supply end is connected to the output end of the second power supply circuit, the output end of the backup power supply is electrically connected to the processing circuit, the backup power supply is also connected to the processing circuit in communication, and the overvoltage protection circuit is arranged on the rectifier circuit and the first power supply circuit The control output terminal of the processing circuit is also connected to the overvoltage protection circuit.

Further, the first power supply circuit includes a capacitor C1, a resistor R4, a resistor R5, a regulator tube DW1, a capacitor C2, a transistor Q2, and a transistor Q3;

The collector of the transistor Q3 is connected to the positive output terminal of the rectifier circuit Z1, the emitter of the transistor Q3 is used as the output terminal of the first power supply circuit, the base of the transistor Q3 is grounded through the capacitor C2, and the collector of the transistor Q2 is connected to the transistor Q3 The collector of the transistor Q2 is grounded through the resistor R5, the emitter of the transistor Q2 is also connected to the collector of the transistor Q3, the base of the transistor Q2 is connected to the collector of the transistor Q3 and the positive output of the rectifier circuit Z1 through the resistor R4 The common connection point between the terminals, the base of the transistor Q2 is also connected to the negative pole of the Zener tube DW1, the positive pole of the Zener tube DW1 is grounded, the common connection point between the collector of the transistor Q3 and the positive output terminal of the rectifier circuit Z1 Connect to ground through capacitor C1.

Further, the second power supply circuit is a power chip LM2596 chip.

Further, the overvoltage protection circuit includes a diode D1, a resistor R1, a resistor R2, a transistor Q1, a resistor R3, a thyristor SCR1, a relay J1, a transistor Q4, and a resistor R6;

The cathode of the diode D1 is connected to the positive output terminal of the rectifier circuit Z1, the anode of the diode D1 is connected to the ground through the resistor R1, one end of the resistor R2 is connected to the anode of the diode D1, and the other end is connected to the base of the transistor Q1, and the emitter of the transistor Q1 The pole is connected to the common connection point between the negative pole of the diode D1 and the positive output terminal of the rectifier circuit Z1, the collector of the triode Q1 is grounded through the resistor R3, the control pole of the thyristor SCR1 is connected to the collector of the triode Q1, and the thyristor The anode of SCR1 is connected to the common connection point between the emitter of transistor Q1 and the cathode of diode D1, the cathode of thyristor SCR1 is grounded through the normally closed switch J1-K1 of relay J1, and the collector of transistor Q4 is connected to 5V power supply. The emitter of Q4 is connected to one end of the coil of relay J1 through resistor R6, the other end of the coil of relay J1 is grounded, and the base of transistor Q4 is connected to the control output end of the processing circuit;

Wherein, the diode D1 is a Zener diode, and the transistor Q1 is a PNP transistor.

Further, the backup power supply includes a battery management circuit and a lithium battery, the power input end of the battery management circuit is connected to the output end of the first power supply circuit, the battery management circuit is connected to the lithium battery, and the power output end of the battery management circuit Connected to the input of the second power supply circuit, the battery management circuit is also communicatively connected to the processing circuit.

Further, the rectification circuit Z1 is a full-bridge rectification circuit composed of four diodes.

Further, a bidirectional transient suppression diode TVS1 is also arranged between the two ends of the induction coil of the energy transformer CT1.

Beneficial effects of the utility model: through the utility model, 12V and 5V direct currents can be provided for the on-line monitoring system, thereby being able to meet the electricity demand of various sensors of the modern monitoring system, and the power supply system itself can realize good protection, thereby While ensuring the safety of electrical equipment, it can effectively improve its own stability and avoid additional labor costs caused by power supply maintenance.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is a structural block diagram of the utility model.

Fig. 2 is the schematic circuit diagram of the utility model.

Figure 3 is a schematic diagram of the relay control.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings of the description, as shown in the figure:

The power supply system of an online power equipment monitoring system provided by the utility model includes: an energy transformer CT1, a rectifier circuit Z1, an overvoltage protection circuit, a first power supply circuit, a second power supply circuit, a backup power supply and a processing circuit;

The two ends of the induction coil of the energy-taking transformer CT1 are respectively connected to the positive input terminal and the negative input terminal of the rectification circuit Z1, the positive output terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit, and the negative input terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit. The output terminal is grounded, the first power supply circuit outputs 12V direct current, the output terminal of the first power supply circuit is also connected to the input terminal of the second power supply circuit, the second power supply circuit outputs 5V direct current, and the input of the backup power supply end is connected to the output end of the second power supply circuit, the output end of the backup power supply is electrically connected to the processing circuit, the backup power supply is also connected to the processing circuit in communication, and the overvoltage protection circuit is arranged on the rectifier circuit and the first power supply circuit The path between, the control output end of described processing circuit is also connected with overvoltage protection circuit, wherein, processing circuit adopts existing single-chip microcomputer, such as STM32 series single-chip microcomputer, 89C51 series single-chip microcomputer etc., those skilled in the art pass the selected single-chip microcomputer And the corresponding specifications of the single-chip microcomputer can realize the circuit construction between the processing circuit and the individual circuits, which will not be repeated here. Through the utility model, 12V and 5V direct current can be provided for the online monitoring system, so as to meet the needs of modern monitoring systems. Sensors and other power requirements, and the power supply system itself can achieve good protection, so as to ensure the safety of electrical equipment while effectively improving its own stability, avoiding additional labor costs caused by power supply maintenance; wherein, the rectifier Circuit Z1 is a full-bridge rectifier circuit composed of four diodes.

In this embodiment, the first power supply circuit includes a capacitor C1, a resistor R4, a resistor R5, a regulator tube DW1, a capacitor C2, a transistor Q2, and a transistor Q3;

The collector of the transistor Q3 is connected to the positive output terminal of the rectifier circuit Z1, the emitter of the transistor Q3 is used as the output terminal of the first power supply circuit, the base of the transistor Q3 is grounded through the capacitor C2, and the collector of the transistor Q2 is connected to the transistor Q3 The collector of the transistor Q2 is grounded through the resistor R5, the emitter of the transistor Q2 is also connected to the collector of the transistor Q3, the base of the transistor Q2 is connected to the collector of the transistor Q3 and the positive output of the rectifier circuit Z1 through the resistor R4 The common connection point between the terminals, the base of the transistor Q2 is also connected to the negative pole of the Zener tube DW1, the positive pole of the Zener tube DW1 is grounded, the common connection point between the collector of the transistor Q3 and the positive output terminal of the rectifier circuit Z1 Ground through capacitor C1; among them, the capacitor is used to filter out AC clutter, and the voltage can be clamped at 12V through the voltage regulator DW1 and resistor R4, and the fuel will output 12V DC through the conduction of transistors Q3 and Q2.

In the present embodiment, the second power supply circuit is a power chip LM2596 chip, of course, the LM2596 chip also includes a peripheral circuit, as shown in Figure 2, wherein the peripheral circuit includes a regulator tube DW2, an inductor L1 and a capacitor C3, its specific The connection structure is shown in Figure 2. Through the above structure, a stable 5V DC can be output.

In this embodiment, the overvoltage protection circuit includes a diode D1, a resistor R1, a resistor R2, a transistor Q1, a resistor R3, a thyristor SCR1, a relay J1, a transistor Q4, and a resistor R6;

The cathode of the diode D1 is connected to the positive output terminal of the rectifier circuit Z1, the anode of the diode D1 is connected to the ground through the resistor R1, one end of the resistor R2 is connected to the anode of the diode D1, and the other end is connected to the base of the transistor Q1, and the emitter of the transistor Q1 The pole is connected to the common connection point between the negative pole of the diode D1 and the positive output terminal of the rectifier circuit Z1, the collector of the triode Q1 is grounded through the resistor R3, the control pole of the thyristor SCR1 is connected to the collector of the triode Q1, and the thyristor The anode of SCR1 is connected to the common connection point between the emitter of transistor Q1 and the cathode of diode D1, the cathode of thyristor SCR1 is grounded through the normally closed switch J1-K1 of relay J1, and the collector of transistor Q4 is connected to 5V power supply. The emitter of Q4 is connected to one end of the coil of relay J1 through resistor R6, the other end of the coil of relay J1 is grounded, and the base of transistor Q4 is connected to the control output end of the processing circuit;

Among them, the diode D1 is a Zener diode, and the transistor Q1 is a PNP transistor; when the output voltage of the rectifier circuit Z1 is too high, the diode D1 is broken down, and the transistor Q1 is electrically conducted at this time, and the control electrode of the thyristor SCR1 The thyristor SCR1 is powered on, and the subsequent circuit is short-circuited after the thyristor SCR1 is turned on, so as to play a good role in protection. Moreover, the triggering characteristics of the thyristor SCR1 ensure that the thyristor SCR1 has In the case of positive voltage, it is always on. If it needs to be restored, the transistor Q4 is controlled by the processing circuit to be turned on. The relay J1 is powered on, and its normally closed switch J1-K1 is turned off, so that the circuit where the thyristor SCR1 is located is disconnected. When the silicon-controlled SCR1 is turned off, the power supply system can be resumed. The input of control commands to the processing circuit can be realized remotely. Just install a 4G module or GPRS module at the processing circuit. Through the above structure, the power supply system can be well played. Protective effect, improve the stability and reliability of the entire power supply system.

In this embodiment, the backup power supply includes a battery management circuit and a lithium battery, the power input end of the battery management circuit is connected to the output end of the first power supply circuit, the battery management circuit is connected to the lithium battery, and the battery management circuit The output end of the power supply is connected to the input end of the second power supply circuit, and the battery management circuit is also communicatively connected with the processing circuit. The battery management circuit adopts an existing battery management chip, such as the MAX1758 chip of MAXIM Company and its peripheral circuits The charging and discharging management circuit constitutes, and has input detection, overcurrent and overvoltage protection, etc., so as to realize good management of the lithium battery, and when the battery management circuit detects that there is no signal power input, the battery is started to supply power, and The battery management circuit sends a fault signal to the processing circuit, and the processing circuit uploads an alarm through the 4G module; through this structure, the power supply system can have continuous power supply to ensure that the monitoring data will not be interrupted.

In this embodiment, . There is also a bidirectional transient suppression diode TVS1 between the two ends of the induction coil of the energy transformer CT1. Through this structure, the impact of the instantaneous large current of the transmission line can be prevented, thereby forming a double layer with the overvoltage protection circuit. Protective effects.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (7)

1. A power supply system of an online power equipment monitoring system, characterized in that: comprising: an energy transformer CT1, a rectifier circuit Z1, an overvoltage protection circuit, a first power supply circuit, a second power supply circuit, a backup power supply and a processing circuit; The two ends of the induction coil of the energy-taking transformer CT1 are respectively connected to the positive input terminal and the negative input terminal of the rectification circuit Z1, the positive output terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit, and the negative input terminal of the rectification circuit Z1 is connected to the input terminal of the first power supply circuit. The output terminal is grounded, the first power supply circuit outputs 12V direct current, the output terminal of the first power supply circuit is also connected to the input terminal of the second power supply circuit, the second power supply circuit outputs 5V direct current, and the input of the backup power supply end is connected to the output end of the second power supply circuit, the output end of the backup power supply is electrically connected to the processing circuit, the backup power supply is also connected to the processing circuit in communication, and the overvoltage protection circuit is arranged on the rectifier circuit and the first power supply circuit The control output terminal of the processing circuit is also connected to the overvoltage protection circuit. 2. The power supply system of the online power equipment monitoring system according to claim 1, wherein the first power supply circuit includes a capacitor C1, a resistor R4, a resistor R5, a regulator tube DW1, a capacitor C2, a transistor Q2 and a transistor Q3 ; The collector of the transistor Q3 is connected to the positive output terminal of the rectifier circuit Z1, the emitter of the transistor Q3 is used as the output terminal of the first power supply circuit, the base of the transistor Q3 is grounded through the capacitor C2, and the collector of the transistor Q2 is connected to the transistor Q3 The collector of the transistor Q2 is grounded through the resistor R5, the emitter of the transistor Q2 is also connected to the collector of the transistor Q3, the base of the transistor Q2 is connected to the collector of the transistor Q3 and the positive output of the rectifier circuit Z1 through the resistor R4 The common connection point between terminals, the base of the transistor Q2 is also connected to the negative pole of the voltage regulator DW1, the positive pole of the voltage regulator DW1 is grounded, the collector of the transistor Q3 and the positive output terminal of the rectifier circuit Z1 are connected to each other. Connect to ground through capacitor C1. 3. The power supply system of the online power equipment monitoring system according to claim 1, wherein the second power supply circuit is a power supply chip LM2596 chip. 4. The power supply system of the online power equipment monitoring system according to claim 1, wherein the overvoltage protection circuit includes a diode D1, a resistor R1, a resistor R2, a triode Q1, a resistor R3, a thyristor SCR1, and a relay J1 , transistor Q4 and resistor R6; The cathode of the diode D1 is connected to the positive output terminal of the rectifier circuit Z1, the anode of the diode D1 is connected to the ground through the resistor R1, one end of the resistor R2 is connected to the anode of the diode D1, and the other end is connected to the base of the transistor Q1, and the emitter of the transistor Q1 The pole is connected to the common connection point between the negative pole of the diode D1 and the positive output terminal of the rectifier circuit Z1, the collector of the triode Q1 is grounded through the resistor R3, the control pole of the thyristor SCR1 is connected to the collector of the triode Q1, and the thyristor The anode of SCR1 is connected to the common connection point between the emitter of transistor Q1 and the cathode of diode D1, the cathode of thyristor SCR1 is grounded through the normally closed switch J1-K1 of relay J1, and the collector of transistor Q4 is connected to 5V power supply. The emitter of Q4 is connected to one end of the coil of relay J1 through resistor R6, the other end of the coil of relay J1 is grounded, and the base of transistor Q4 is connected to the control output end of the processing circuit; Wherein, the diode D1 is a Zener diode, and the transistor Q1 is a PNP transistor. 5. The power supply system of the online power equipment monitoring system according to claim 4, characterized in that: the backup power supply includes a battery management circuit and a lithium battery, the power input terminal of the battery management circuit and the output terminal of the first power supply circuit The battery management circuit is connected to the lithium battery, the power output terminal of the battery management circuit is connected to the input terminal of the second power supply circuit, and the battery management circuit is also communicatively connected to the processing circuit. 6. The power supply system of the online power equipment monitoring system according to claim 1, wherein the rectification circuit Z1 is a full-bridge rectification circuit composed of four diodes. 7. The power supply system of the on-line power equipment monitoring system according to claim 1, characterized in that: a bidirectional transient suppression diode TVS1 is also arranged between the two ends of the induction coil of the energy transformer CT1.