CN202334336U

CN202334336U - Active electronic type transformer power supply

Info

Publication number: CN202334336U
Application number: CN2011204550905U
Authority: CN
Inventors: 程顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2012-07-11
Anticipated expiration: 2021-11-10

Abstract

The utility model relates to an active electronic type transformer power supply and belongs to the technical field of electric power systems. The power supply provided by the utility model comprises a capacitance voltage dividing circuit, a voltage stabilizing protective circuit, a rectification filter circuit and a super capacitor tank circuit which are sequentially connected, wherein the capacitance voltage dividing circuit and the voltage stabilizing protective circuit are adopted, so that the anti-interference ability is strong, input/output two-way anti-interference is realized, the input voltage range is wide and the output voltage is stable; and the tank circuit adopts a super capacitor rather than a storage battery, so that a super-strong charge retention is provided, the leakage current is small, a special charging circuit and a control discharge circuit are not required, the charging is quick. Compared with the storage battery, the power supply, which is a kind of green power supply, has the advantages that over charge and over discharge have no adverse impact on the service life, the reliability is high, the service life is long, and the pollution is avoided; and besides, the power supply which adopts passive electronic components has high reliability.

Description

A kind of active electronic transformer power supply

Technical field

The utility model relates to technical field of power systems, is a kind ofly directly to obtain electric energy from high-tension line, to a kind of active electronic transformer power supply of instrument transformer power supply.

Background technology

The measuring-signal of the electrical parameters detection equipment of high-tension line (like electronic current mutual inductor, the electronic type voltage transformer of active type) adopts fiber-optic communications traffic; Make and have the good insulation isolation between high side and the low-voltage circuit; Just become a key technology to the high-pressure side circuit supply like this; Present active electronic current transformer, the power source design that voltage transformer is commonly used mainly contain and utilize bus current power taking, the power taking of high-voltage capacitance dividing potential drop, the power taking of low-pressure side emission laser; The high-pressure side converts powered into through photoelectric effect, the power supply plan that solar energy combines with energy-storage battery etc.

The inductive current power taking is also claimed in the bus current power taking, is to accomplish through a magnetic induction coil that is enclosed within on the high-tension line, has magnetic field around the high-tension line, obtains energy through magnetic field, and is treated then, offers the high-pressure side circuit.This technical scheme mode volume is little, compact conformation, insulation-encapsulated is simple, safe in utilization, cost is low; Shortcoming is that the high-tension line electric current is not a stationary value; And excursion is very big, so magnetic induction coil must take into account minimum, maximum two kinds of maximum conditions simultaneously, has the dead band of minimum value at present; When high-tension line electric current＜30A, system's cisco unity malfunction.

The capacitance current power taking; Be to utilize capacitor voltage divider to get and can supply power from the electric field that high-tension line exists on every side, because the relative electric current of primary voltage is more stable, the power supply output of this scheme is also more stable; But solve the electrical isolation problem of getting between ability circuit and the follow-up work circuit; Overvoltage protection and EMC Design must be arranged, because the capacity problem of high-voltage capacitance, the power that adopts this method to obtain is limited.

In sum, inductive current power taking and capacitance current power taking respectively have superiority and inferior position, use a kind of way to take power separately, and stable power supply reliably can not be provided.

Summary of the invention

In order to solve independent inductive current power taking or capacitance current power taking, stable power supply problem reliably can not be provided, the utility model provides a kind of active electronic transformer power supply that capacitance current power taking and inductive current power taking combine.

The technical scheme of the utility model is following:

A kind of active electronic transformer power supply, this power supply is made up of the capacitance partial pressure circuit, protective circuit of voltage regulation, current rectifying and wave filtering circuit, the ultracapacitor energy storage circuit that connect successively.

Said capacitance partial pressure circuit is in series by electric capacitor C1, electric capacitor C2 and reactor G1 in proper order; The end of electric capacitor C1 connects high voltage bus L, and the end of reactor G1 connects ground wire.

The circular magnetic core T1 that said protective circuit of voltage regulation adopts high permeability material to process, even coiling primary winding coil N1, auxiliary winding coil N2, auxiliary winding coil N3 on this magnetic core, primary winding coil N1 connects electric capacitor C2 two ends; Auxiliary winding coil N2 is with after resonant capacitance C is parallelly connected, and N3 connects with the auxiliary winding coil, connects current rectifying and wave filtering circuit again.

Said current rectifying and wave filtering circuit is made up of rectifier bridge B1 and electrochemical capacitor C3, ceramic MLCC capacitor C 4.

Said measuring management circuit is single chip machine controlling circuit A; P1, P2 are the voltage detecting input, and P1 connects the positive output end of current rectifying and wave filtering circuit, and P2 connects the positive input terminal of ultracapacitor energy storage circuit; P3, P4 are output control terminal, connect S1, S2 grid control end respectively.

Said ultracapacitor energy storage circuit, by powerful metal-oxide-semiconductor S1, S2, fast recovery diode D1, D2, inductance L 3, protection diode D3, D4, super capacitor C6 forms; The D1 both positive and negative polarity is connected respectively to drain electrode and the source electrode of S1; The D2 both positive and negative polarity is connected respectively to drain electrode and the source electrode of S2; The drain electrode of S1 links to each other with the end of the source electrode of S2 and L3; The other end of L3 links to each other with the positive pole of super capacitor C6, the positive pole of D3, the negative pole of D4, and the negative pole of D3 links to each other with the source electrode of S1, and the C6 negative pole links to each other with the drain electrode of S2, the positive pole of D4, the negative pole of current rectifying and wave filtering circuit respectively.

The beneficial effect of the utility model is:

1, use the passive electronic components and parts, simple in structure, reliability is high.

2, adopt capacitance partial pressure and protective circuit of voltage regulation, antijamming capability is strong, can realize importing, export two-way anti-interference.Wide input voltage range, output voltage stabilization, no overvoltage phenomenon.

3, when high voltage bus voltage is lower than minimum design work voltage; The electric energy that is stored in the super capacitor energy-storage circuit begins outside circuit supply; After high voltage bus voltage recovers normally; Again by charging circuit to the accumulator storage power, so just avoided the influence of the interruption of under-voltage and short time voltage to power supply output.

4, accumulator adopts ultracapacitor to replace energy storage battery, because ultracapacitor has the super large capacitor amount of farad level, superpower retention of charge; And leakage current is very little, charging circuit that need not be special and control discharge circuit, and charging is rapidly; Compare with storage battery; It overcharges, mistake is put and its life-span do not constituted negative effect, and reliability is high, long service life (charge and discharge circulation life is more than 100,000 times, and accumulator cell charging and discharging circulates only 1000 times); Have good temperature performance in addition, can in-40 ℃～75 ℃ ambient temperature, normally use; Pollution-free, be a kind of green power supply.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is the utility model circuit diagram.

Fig. 3 is the utility model protective circuit of voltage regulation figure.

Fig. 4 is the utility model protective circuit of voltage regulation instance one.

Fig. 5 is the utility model protective circuit of voltage regulation instance two.

L+ is that the utility model active electronic transformer power supply is anodal among the figure, and L-is the utility model active electronic transformer power supply negative pole.

Embodiment

The utlity model has dividing potential drop, voltage stabilizing, energy-storage function.

The capacitance partial pressure circuit of the utility model is in series by electric capacitor C1, electric capacitor C2 and reactor G1 in proper order; The end of electric capacitor C1 connects high voltage bus L, and the end of reactor G1 connects ground wire.

Protective circuit of voltage regulation instance such as Fig. 4, shown in Figure 5, wherein Fig. 4 is a core type, and Fig. 5 is a shell-type, and Fig. 3 is a circuit diagram.Protective circuit of voltage regulation is made up of circular magnetic core T1, primary winding coil N1, auxiliary winding coil N2, auxiliary winding coil N3 resonant capacitor C.

The utility model adopts high voltage bearing electric capacitor C1, C2 between high voltage bus L and ground wire, carry out dividing potential drop; Primary winding coil N1 through around circular magnetic core T1 produces inductance, and primary winding coil N1 will produce alternating magnetic field in circular magnetic core T1 loop through behind the electric current; And auxiliary winding side magnetic loop is made up of two parts; Wherein there is an auxiliary winding coil N2 parallelly connected, produces resonance, make magnetic circuit be operated in saturation condition here at auxiliary winding side magnetic loop with humorous capacitor C; That is to say that auxiliary winding side magnetic loop does not go up and down bigger variation is arranged with primary winding loop voltage U1 with alternating magnetic field, utilize the magnetic saturation characteristic of auxiliary winding side magnetic loop, make the voltage U 2 of auxiliary winding side be in stable state.The surges, lightning impulse, High-frequency Interference etc. of so just having avoided the primary winding side produce the voltage U 2 of auxiliary winding side and have a strong impact on; The interference of auxiliary winding side simultaneously can not exert an influence to the primary winding side; Play the effect of two-way isolation, output voltage is also kept constant, plays the effect of voltage stabilizing.

Current rectifying and wave filtering circuit is made up of rectifier bridge B1 and electrochemical capacitor C3, ceramic MLCC capacitor C 4, is the charging of ultracapacitor energy storage circuit.

The measuring management circuit is single chip machine controlling circuit A; P1, P2 are the voltage detecting input, and P1 connects the positive output end of current rectifying and wave filtering circuit, and P2 connects the positive input terminal of ultracapacitor energy storage circuit; P3, P4 are output control terminal, link S1, S2 grid control end respectively.

Accumulator adopts ultracapacitor to replace storage battery, because ultracapacitor has the super large capacitor amount of farad level, superpower retention of charge; And leakage current is very little, charging circuit that need not be special and control discharge circuit, and charging is rapidly; Compare with storage battery, it overcharges, crosses and put to its life-span formation negative effect, reliability height, long service life; Pollution-free, be green power supply.

Design example: establishing the current rectifying and wave filtering circuit output voltage is 5V; Super capacitor selects for use the 2.5V/50F ultracapacitor to form; The ESR of its single capacitor product (DC) 20m Ω, the ultracapacitor charging interval is (is under the situation of 5A in charging current): 25 seconds, ultracapacitor was discharge time: 99 seconds; The 5V/50F ultracapacitor can discharge into 0.6V from 5V, hangs down behind 1V at this setting discharge voltage to begin charging.

Claims

1. an active electronic transformer power supply is characterized in that, this power supply is made up of the capacitance partial pressure circuit, protective circuit of voltage regulation, current rectifying and wave filtering circuit, the ultracapacitor energy storage circuit that connect successively.

2. a kind of active electronic transformer power supply as claimed in claim 1 is characterized in that said capacitance partial pressure circuit is in series by electric capacitor C1, electric capacitor C2 and reactor G1 in proper order; The end of electric capacitor C1 connects high voltage bus L, and the end of reactor G1 connects ground wire.

3. like claim 1 or the described a kind of active electronic transformer power supply of claim 2; It is characterized in that; The circular magnetic core T1 that said protective circuit of voltage regulation adopts high permeability material to process; Even coiling primary winding coil N1, auxiliary winding coil N2, auxiliary winding coil N3 on T1, primary winding coil N1 connects electric capacitor C2 two ends; Auxiliary winding coil N2 is with after resonant capacitance C is parallelly connected, and N3 connects with the auxiliary winding coil, connects current rectifying and wave filtering circuit again.

4. a kind of active electronic transformer power supply as claimed in claim 1 is characterized in that, said current rectifying and wave filtering circuit is made up of rectifier bridge B1 and electrochemical capacitor C3, ceramic MLCC capacitor C 4.

5. a kind of active electronic transformer power supply as claimed in claim 1 is characterized in that, said ultracapacitor energy storage circuit; By powerful metal-oxide-semiconductor S1, S2, fast recovery diode D1, D2, inductance L 3; Protection diode D3, D4, super capacitor C6 forms; The D1 both positive and negative polarity is connected respectively to drain electrode and the source electrode of S1; The D2 both positive and negative polarity is connected respectively to drain electrode and the source electrode of S2; The drain electrode of S1 links to each other with the end of the source electrode of S2 and L3; The other end of L3 links to each other with the positive pole of super capacitor C6, the positive pole of D3, the negative pole of D4, and the negative pole of D3 links to each other with the source electrode of S1, and the C6 negative pole links to each other with the drain electrode of S2, the positive pole of D4, the negative pole of current rectifying and wave filtering circuit respectively.