CN202309243U - Power supply device for induction power taking from high-voltage side - Google Patents

Abstract

The utility model relates to the field of electric engineering, in particular to a power supply device for induction power taking from a high-voltage side, which can provide a low voltage power supply for a monitoring device arranged on a high voltage power transmission circuit or in a high voltage switching cabinet. The power supply device structurally comprises a power taking module, an electrical energy conditioning module and an intelligent protecting module. The power taking module comprises a primary bus, a current inductor magnetic core, a secondary coil, a sampling resistor and a single-pole double-throw relay. The electrical conditioning module comprises a rectifying circuit, a point leakage circuit, a ripple filter capacitor and a voltage stabilizing circuit. The intelligent protecting module comprises an STM8 single-chip microcomputer, a radio frequency (RF) module and a super capacitor. The power supply device has a protection function and an intelligent monitoring function, can not only effectively prevent the power supply device and rear load from being burned out, but also can conduct real-time monitoring on operation of a power supply through an RF device, and guarantees safety and stability of providing electrical energy for external load.

Description

A kind of supply unit of the induction power taking from the high-pressure side

Technical field

The utility model relates to electrical technology field, specifically is that a kind of can the survey from high pressure gone up the supply unit of responding to power taking through the noncontact mode, can be the monitoring device that is installed on the ultra-high-tension power transmission line or in the high-tension switch cabinet low-tension supply is provided.

Background technology

The demand for development of intelligent grid is on ultra-high-tension power transmission line or in the high-tension switch cabinet; Add the servicing unit that is used to monitor and improve the status monitoring ability of power transmission and transformation; These servicing units are in the hyperbaric environment for a long time, and the installation site is also comparatively harsh, and it is difficult that power supply provides.At present, the supply power mode that servicing unit is commonly used has solar cell and two kinds of induction power taking power supplys.The solar cell cost is high, volume is big, the installation site is limited, power is unstable, use is inconvenient.Induction power taking power utilization electromagnetic induction principle and magnetic saturation technology is obtained electric energy through the on high-tension side electric current of current transformer (CT) induction, have that cost is low, volume is little, flexible for installation, export stable advantage.Compare solar cell, induction power taking power supply is suitably for the power supply of power transmission and transformation monitoring servicing unit more.But the magnetic saturation technology causes the interchange output of CT to have the higher voltage spike, and due to voltage spikes can be damaged the power supply internal components.

Application number is 201010134788.7; Name is called " being used for the induction electricity getting device on the ultra-high-tension power transmission line " Chinese invention patent application and application number is 201010002539.2, and name is called the application of " non-contact inductive electricity-getting device for electric tunnel cable " Chinese invention patent and has all designed the due to voltage spikes leadage circuit.Leadage circuit constitutes through power tube and bleeder resistance, when the CT output voltage is too high, and the power tube conducting, bleeder resistance converts the spike energy absorption into thermal dissipation and falls.Yet this method has problems in practicality.Transmission line or high-tension switch cabinet possibly need overlond running owing to the load anxiety; Though when design circuit, leave certain allowance to electric current; But overload current is in case surpass the maximum current of regulation; Protective circuit damage fault can appear in the CT power supply, so that burns the rear load, causes huge economic loss.

Summary of the invention

The utility model technical problem to be solved is the deficiency to prior art, and the supply unit of responding to power taking from the high-pressure side that a kind of design is more reasonable, can realize the power taking of noncontact mode is provided.

The utility model technical problem to be solved is to realize through following technical scheme.The utility model is a kind of supply unit of the induction power taking from the high-pressure side, and be characterized in: it comprises electricity-fetching module, electric energy conditioning module and intelligent protection module;

Said electricity-fetching module contains bus, current transformer core, secondary coil, sample resistance, single-pole double throw relay; A said bus passes said current transformer core; Said secondary coil is on said current transformer core, and is and parallelly connected with said sample resistance, connects with said single-pole double throw relay again;

Said electric energy conditioning module contains rectification circuit, most advanced and sophisticated leadage circuit, ripple filtering electric capacity, voltage stabilizing circuit, is connected in series successively between each circuit; Most advanced and sophisticated leadage circuit comprises voltage-stabiliser tube, connect with the voltage-stabiliser tube current-limiting resistance direct current output-parallel of back and rectifier bridge of voltage-stabiliser tube, wherein between parallelly connected another current-limiting resistance, this current-limiting resistance links to each other with the power tube gate pole, with the voltage of conducting of power controlling pipe or shutoff;

Said intelligent protection circuit comprises STM8 single-chip microcomputer, RF radio-frequency module and super capacitor; The RF radio-frequency module is connected with the UART pin of said STM8 single-chip microcomputer; Super capacitor is connected in parallel on the feeder ear of STM8 single-chip microcomputer.

Current transformer core described in the present invention, secondary coil and sample resistance take out a bus electric energy.The electric energy of induction after rectification circuit, most advanced and sophisticated leadage circuit, ripple filtering circuit and voltage stabilizing circuit conditioning, the electric energy that obtains expecting.Said STM8 single-chip microcomputer is a single chip control module, can monitor the working temperature of most advanced and sophisticated leadage circuit, and preset temperature exceed standard threshold value, recover threshold value and the duration that exceeds standard.After working temperature exceeded standard, single chip control module was broken off power supply circuits through control single-pole double throw relay, and after the working temperature of most advanced and sophisticated leadage circuit got into the recovery threshold value, the single-pole double throw relay inserted power supply circuits again.After current supply circuit broke off, single chip control module was supplied power by inner super capacitor.When in the preset duration that exceeds standard, the working temperature of most advanced and sophisticated leadage circuit can not get into when recovering threshold value, and the RF radio-frequency module starts, and issues the order of supply unit fault.The RF radio-frequency module is sent to background host computer by Single-chip Controlling with the power work state, so that monitoring in real time; Super capacitor is parallelly connected with single-chip microcomputer, in order to when main current supply circuit breaks off, to supply power to single-chip microcomputer.

The utility model is from the supply unit technical scheme of high-pressure side induction power taking, and each components and parts, module and control system all can be used disclosed components and parts applicable to the utility model, module and control system in the prior art if no special instructions.

Compared with prior art, the utility model can not only effectively protect supply unit and rear load not to be burnt, and can also move power supply through the RF radio-frequency unit and monitor in real time, has guaranteed external loading is provided the fail safe and the stability of electric energy.The utility model application prospect is good, can bring high economic benefit.

Description of drawings

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

Fig. 2 is the physical circuit figure of electric energy conditioning module.

Embodiment:

Following with reference to accompanying drawing, further describe the concrete technical scheme of the utility model, so that those skilled in the art understands the utility model further, and do not constitute restriction to its right.

Embodiment 1, and with reference to Fig. 1-2, a kind of supply unit of the induction power taking from the high-pressure side: it comprises electricity-fetching module 1, electric energy conditioning module 2 and intelligent protection module 3;

Said electricity-fetching module 1 contains bus 11, current transformer core 12, secondary coil 13, sample resistance 14, single-pole double throw relay 15; A said bus 11 passes said current transformer core 12; Said secondary coil 13 is on said current transformer core 12, and is and parallelly connected with said sample resistance 14, connects with said single-pole double throw relay 15 again;

Said electric energy conditioning module 2 contains rectification circuit 21, most advanced and sophisticated leadage circuit 22, ripple filtering electric capacity 23, voltage stabilizing circuit 24, is connected in series successively between each circuit; Most advanced and sophisticated leadage circuit 22 comprises voltage-stabiliser tube, connect with the voltage-stabiliser tube current-limiting resistance direct current output-parallel of back and rectifier bridge of voltage-stabiliser tube, wherein between parallelly connected another current-limiting resistance, this current-limiting resistance links to each other with the power tube gate pole, with the voltage of conducting of power controlling pipe or shutoff;

Said intelligent protection circuit 3 comprises STM8 single-chip microcomputer 31, RF radio-frequency module 32 and super capacitor; The RF radio-frequency module is connected with the UART pin of said STM8 single-chip microcomputer 31; Super capacitor is connected in parallel on the feeder ear of STM8 single-chip microcomputer 31.

As shown in Figure 1, be connected with the alternating current of constant amplitude on bus 11, will produce alternating magnetic field around the circuit, and on current transformer core 12 magnetic flux of generation alternation, this magnetic flux will induce the induced current of alternation on said secondary coil 13.Induced current becomes electromotive force output on said sample resistance 14.Under the condition of said single-pole double throw relay 15 (JQC-3F) closure, said induced electromotive force becomes pulsating dc voltage after rectification circuit 21 rectifications.Pulsating dc voltage is released the spike energy of pulsating direct current behind said most advanced and sophisticated leadage circuit 22, again can be with bigger voltage ripple filtering through said ripple filtering electric capacity 23.At last, this voltage is reduced to 5.5V behind voltage stabilizing circuit 24, supplies with monitoring terminal and uses.

In the entire circuit running, said single chip control module 31 can be monitored the working temperature of most advanced and sophisticated leadage circuit 22, and preset temperature exceed standard threshold value, recover threshold value and the duration that exceeds standard.After working temperature exceeded standard, said STM8 single-chip microcomputer 31 broke off power supply circuits through said single-pole double throw relay 15, and after the working temperature of said most advanced and sophisticated leadage circuit 22 got into the recovery threshold value, said single-pole double throw relay 15 inserted power supply circuits again.After power supply was broken off, said single chip control module 31 was supplied power by inner super capacitor.When in the preset duration that exceeds standard, the working temperature of said most advanced and sophisticated leadage circuit 22 can not get into when recovering threshold value, and said RF radio-frequency module 32 starts, and issues the order of supply unit fault.

For guaranteeing bus current when the 50A, supply unit can start, and selects the 50/60Hz silicon steel sheet as current transformer core 12 materials, and the lamination coefficient is 10, magnetic circuit radius 9mm.Secondary coil 13 has coiling 180 circles altogether by the coiling of 0.21mm enamelled wire.Sample resistance 14 (80 Ω, 10w) is connected in parallel on the output of secondary coil, is used for the induction alternating electromotive force is set in a suitable electrical voltage point.When single-pole double throw relay 15 closures, electricity-fetching module 1 just send induction electric energy and the rear device.

During said electric energy conditioning module 2 practical implementations, as shown in Figure 2.

The alternating voltage at sample resistance two ends becomes pulsating dc voltage by rectification circuit W10G, the transient state that parallel connection is used to protect power module not receive surge impact in the loop diode D3 that draws up.

Because the magnetic saturation influence, can there be great spike effect in said pulsating dc voltage, will not damage posterior member if do not handle.When the pulsating direct current spike be higher than voltage-stabiliser tube D1 voltage stabilizing value and current-limiting resistance R4 (5.1K Ω, during 0.5w) pressure drop summation, the D1 conducting.Subsequently, power tube T1 gets into conducting state as the overvoltage protection of power supply, the spike energy of pulsating direct current be transferred to bleeder resistance R1 (50 Ω, 10w) on.(100K Ω 0.5w) is the current-limiting resistance of T1 gate pole to resistance R 3.At this moment, filter capacitor C1 (1000uF) can obtain steady direct voltage with the voltage ripple filtering.

Said steady direct voltage is reduced to 5.5V behind the voltage stabilizing circuit via LM2575 chip, L1 (330H), diode D4 formation, supplies with the rear load and uses.Capacitor C 2 (330uF) is the filter capacitor of circuit output end of pressure-stabilizing.

In the said intelligent protection module 3, control module is selected STM8 single-chip microcomputer 31 for use; STM8 single-chip microcomputer 31 power supplys are input as the output of electric energy conditioning module 2; When temperature exceeding standard, STM8 single-chip microcomputer 31 is thrown single-pole double throw relay 15 (JQC-3F) in the gear that circuit is broken off through the PG0 pin, after temperature is recovered normally, just single-pole double throw relay 15 (JQC-3F) is inserted again; Super capacitor is supplied power to STM8 single-chip microcomputer 31 when main current supply circuit breaks off.

The capacity of said super capacitor need guarantee can carry out in STM8 single-chip microcomputer 5 minutes after main circuit outage the temperature detection of most advanced and sophisticated leadage circuit, and gets into when recovering threshold value in temperature, and control single-pole double throw relay 15 (JQC-3F) insert current supply circuit again.For saving the super capacitor storing electricity, said STM8 single-chip microcomputer is in and enlivens shutdown mode, only when measuring temperature, just starts.After capacitances to supply power plays the 5th minute; If most advanced and sophisticated leadage circuit temperature still can not drop to the recovery threshold value; Said RF radio-frequency module 32 gets into emission mode by sleep pattern, and ZigBee agreement capable of using is uploaded the power module fault data to background host computer, so that monitoring in real time; In said RF radio-frequency module 32, the RF chip can be chosen SI4432.

Claims (1)

1. supply unit from high-pressure side induction power taking, it is characterized in that: it comprises electricity-fetching module, electric energy conditioning module and intelligent protection module;

Said electricity-fetching module contains bus, current transformer core, secondary coil, sample resistance, single-pole double throw relay; A said bus passes said current transformer core; Said secondary coil is on said current transformer core, and is and parallelly connected with said sample resistance, connects with said single-pole double throw relay again;

Said electric energy conditioning module contains rectification circuit, most advanced and sophisticated leadage circuit, ripple filtering electric capacity, voltage stabilizing circuit, is connected in series successively between each circuit; Most advanced and sophisticated leadage circuit comprises voltage-stabiliser tube, connect with the voltage-stabiliser tube current-limiting resistance direct current output-parallel of back and rectifier bridge of voltage-stabiliser tube, wherein between parallelly connected another current-limiting resistance, this current-limiting resistance links to each other with the power tube gate pole, with the voltage of conducting of power controlling pipe or shutoff;

Said intelligent protection circuit comprises STM8 single-chip microcomputer, RF radio-frequency module and super capacitor; The RF radio-frequency module is connected with the UART pin of said STM8 single-chip microcomputer; Super capacitor is connected in parallel on the feeder ear of STM8 single-chip microcomputer.

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