CN207354062U

CN207354062U - A kind of electronic potential device

Info

Publication number: CN207354062U
Application number: CN201720728919.1U
Authority: CN
Inventors: 张东胜
Original assignee: 张东胜
Current assignee: Beijing Jingdian Technology Co.,Ltd.
Priority date: 2017-06-22
Filing date: 2017-06-22
Publication date: 2018-05-11
Anticipated expiration: 2027-06-22

Abstract

The utility model discloses a kind of electronic potential device, it includes an AC power input, one or more high-voltage inverted modules, one or more equalizer circuits, one or more transformers, one or more lower pressure rectifier modules, one or more output inverter module.The electronic potential device of the utility model can be directly accessed High Level AC Voltage, realizing bidirectional electric energy flow can be achieved, by electric energy, any conversion is simple with circuit structure between High Level AC Voltage and low-voltage AC or low-voltage DC, it is few to convert series, Multiple coil high frequency transformer can be used, cost is low, and reliability is high, it is small, it is efficient.

Description

A kind of electronic potential device

Technical field

It the utility model is related to an electronic potential device for being used for power grid electric power system.

Background technology

It is not that the power consumption of residential customer significantly increases year by year with the improvement of people ' s living standards with the popularization of household electrical appliance Long, but the distribution line such as factories and miness unit, residential quarters, shop renovates, speed relatively lags behind, and causes line end voltage Far below allowed band, while voltage fluctuation is very big, and power grid generally frequently occurs overload phenomenon, washing machine, air conditioner, TV The non-illumination load such as machine is difficult to work normally, and causes significant damage to electrical equipment.Meanwhile the work that traditional electric power system uses Frequency power transformer dosage is huge, consumes the metals such as substantial amounts of copper, iron, and using materials such as a large amount of insulating oils, cause severe environments Pollution.

With the continuous development of Power Electronic Technique, substitute traditional transformer with Power Electronic Technique, and improve traditional confession Electrically become feasible.After substituting traditional transformer with Power Electronic Technique, the consumption of metal material resource can be greatly reduced, Transformer is reduced from power consumption, in-situ stabilized supply voltage, realizes that the high pressure mode of registering one's residence is powered, the use of low-voltage cable is greatly reduced Amount, reduces distribution construction cost, reduces circuit network loss.

Chinese patent CN105932883A discloses a kind of power electronics based on the direct AC-AC converters of energy injection type Transformer, it can realize simple the single stage shift transmitted in both directions of energy, topological structure, high conversion efficiency, small, cost is low. Input voltage is subjected to yet with its semiconductor devices, causes it to be only used for the relatively low occasion of network voltage, and current state Inside and outside power supply distribution network systems backbone generally uses 6kv, 10kv, 35kv, horizontal with current semiconductor devices, is also difficult to meet to want Ask.

Chinese patent CN105897004A discloses a kind of electric power electric transformer of more level DC busbar self-balancings and opens up Flutter structure, it uses more level neutral-point-clamped technologies, it can be achieved that high input voltage, it is not necessary to the Voltage Feedback of dc-link capacitance into Row capacitance voltage is balanced, and the control algolithm of rectification side greatly simplifies.It is of high cost for 4 grades of conversion but the circuit structure is complicated, Own loss is big, it is difficult to wide popularization and application.

Chinese patent CN105680488A discloses a kind of MMC type multiport electric power applied to alternating current-direct current mixing power distribution network Electronic transformer, can direct voltage input using MMC cascade systems.But the circuit is equally complicated, is converted for 4 grades, Of high cost, own loss is big, it is difficult to wide popularization and application.

The content of the invention

The purpose of this utility model is a kind of electronic potential device of design, its can be directly accessed High Level AC Voltage, it can be achieved that Realizing bidirectional electric energy flow, electric energy is arbitrarily changed between High Level AC Voltage and low-voltage AC or low-voltage DC, has circuit Simple in structure, conversion series is few, and Multiple coil high frequency transformer can be used, and cost is low, and reliability is high, small, efficient.

A kind of electronic potential device of the utility model design, it includes：

One AC power input, includes input terminal Vin1 and input terminal Vin2；

One or more high-voltage inverted modules (1), it exchanges exit (6) (7) and is connected in series, wherein, head end first One exchange exit (6) of high-voltage inverted module (1) is connected with the input terminal Vin1 that the AC power inputs, end high pressure One exchange exit of inverter module (8) is connected with the input terminal Vin2 that the AC power inputs；

One or more equalizer circuits (2), its both ends connect with the exit that exchanges of the high-voltage inverted module (1) respectively Connect；

One or more transformers (3), its primary side winding respectively with high-voltage inverted module (1) the DC side midpoint and The midpoint connection of the equalizer circuit (2)；

One or more lower pressure rectifier modules (4), its exchange side exit and DC side midpoint respectively with the transformer (3) vice-side winding connection, the DC side positive and negative terminal of the multiple lower pressure rectifier module (4) are connected in parallel；

One or more output inverter modules (5), its DC side positive and negative terminal and midpoint with respectively with lower pressure rectifier module (4) DC side positive and negative terminal and midpoint connection, its exchange side exit and output end vo 1, Vo2 of the DC side midpoint as the present apparatus.

AC power input described in the utility model, is the input of single phase industrial frequence AC power, its voltage range includes 6,000 Lie prostrate, 10,000 volts and 350,000 volts.

High-voltage inverted module (1) described in the utility model is by single-phase bridge inverter circuit and the direct current being connected in series filter Ripple capacitance is formed, and the single-phase bridge inverter circuit is formed by connecting by 4 groups of semiconductor switch devices, its semiconductor switch device Can be IGBT, MOSFET, IGCT.

Equalizer circuit (2) described in the utility model is to be formed by one comprising centre tapped shunt inductance (11).

Another structure of equalizer circuit (2) described in the utility model be by one comprising centre tapped shunt inductance and Two series capacitances (14) are formed, and the both ends of one end of described two series capacitances (14) respectively with shunt inductance are connected in series, Exchange exit of the other end of series capacitance (14) respectively with the high-voltage inverted module (1) is connected, the shunt inductance Centre cap is connected with a primary side winding of the transformer (3).

Another structure of equalizer circuit (2) described in the utility model be by a centre tapped shunt inductance of inclusion and Two series capacitances, series inductance (15) are formed, one end of described two series capacitances both ends with shunt inductance respectively It is connected in series, the exchange exit of the other end of series capacitance respectively with the high-voltage inverted module (1) is connected, the series electrical Feel the one end of (15) and the centre cap of shunt inductance connects, the other end of series inductance (15) and the one of the transformer (3) A primary side winding connection.

The primary side of transformer (11) described in the utility model includes multiple windings, each winding respectively with it is described high-voltage inverted Module (1) DC side midpoint and the connection of the midpoint of the equalizer circuit (2)；

Lower pressure rectifier module (4) described in the utility model and output inverter module (5) are by single-phase semi-bridge inversion circuit And the DC filter capacitor that is connected in series is formed, the single-phase semi-bridge inversion circuit be by 2 groups of semiconductor switch devices connections and Into its semiconductor switch device can be IGBT, MOSFET, IGCT.

Brief description of the drawings

Fig. 1 is a kind of electrical structure diagram of electronic potential device of the utility model.

Fig. 2 is the circuit diagram of the high-voltage inverted module of the utility model.

Fig. 3 is the lower pressure rectifier module and output inverter module circuit diagram of the utility model.

Fig. 4 is the connection circuit structure diagram of the multiwinding transformer of the utility model.

Fig. 5 is one embodiment of the equalizer circuit of the utility model.

Fig. 6 is another embodiment of the equalizer circuit of the utility model.

Embodiment

Below in conjunction with the accompanying drawings, a kind of electronic potential device implementation of the utility model and the course of work is discussed in detail.

As shown in Figure 1, it is the electrical structure diagram of the utility model electronic potential device.Wherein AC power is by port Vin1 And Vin2 accesses, multiple high-voltage inverted modules (1) exchange exit (6) (7) by it and are connected in series, it exchanges exit (6) (7) while with the both ends of equalizer circuit (2) be connected, and its DC side midpoint and the midpoint of equalizer circuit (2) connection respectively with change Depressor connects.The equal component voltage of multiple high-voltage inverted modules (1) is passed through in power frequency AC input, and after carrying out high frequency modulated, is led to DC side midpoint and the midpoint of equalizer circuit (2) are crossed, is respectively connected to transformer (3) primary side winding.The secondary of each transformer (3) around Group is changed into direct current by multiple lower pressure rectifier modules (4), after parallel with one another, by exporting inverter module (5), is changed into high frequency The alternating current of modulated direct current or power frequency and other frequencies.

Fig. 2 is the circuit diagram of the high-voltage inverted module of the utility model, and it includes 4 groups of semiconductor switch devices and two The capacitor that group is connected in series.Semiconductor switch device connects into single-phase bridge circuit, the DC side connection filtering of bridge circuit Capacitance, is modulated by the HF switch of semiconductor switch device, so as to fulfill the mutual conversion of alternating current and direct current.

Fig. 3 is the lower pressure rectifier module (4) and output inverter module (5) circuit diagram of the utility model, it is by two groups Semiconductor switch device connects into half-bridge circuit, and two groups of capacitors being connected in series carry out DC filtering to half-bridge circuit, pass through Semiconductor switch device HF switch is modulated, so as to fulfill the mutual conversion of alternating current and direct current.

Fig. 4 is the connection circuit structure diagram of the multiwinding transformer of the utility model, and transformer (11) includes more in figure A primary side winding, each primary side winding connect a high-voltage inverted module (1), its vice-side winding forms a total output.Adopt The quantity of number transformer and lower pressure rectifier module (4) can be effectively reduced with multiwinding transformer, achievees the purpose that to reduce cost.

Fig. 5 is one embodiment of the equalizer circuit of the utility model, uses 2 capacitances (14) in figure, is series at respectively The both ends of equalizer circuit shunt inductance, can effectively improve power frequency impedance, reduce transformer low frequency bias current, efficiently use transformation Device flux density.

Fig. 6 is another embodiment of the equalizer circuit of the utility model, compared to Fig. 5 circuits, adds one and is series at Series inductance (15) between equalizer circuit (2) shunt inductance midpoint and transformer (3) primary side winding, passes through series inductance (15), transformer (3) leakage reactance can be increased, reduce dither current peak value.

Claims

A kind of 1. electronic potential device, it is characterised in that：It includes：

One AC power input, includes input terminal Vin1 and input terminal Vin2；

One or more high-voltage inverted modules (1), it exchanges exit (6) (7) and is connected in series, wherein, first high pressure of head end One exchange exit (6) of inverter module (1) is connected with the input terminal Vin1 that the AC power inputs, and end is high-voltage inverted One exchange exit of module (8) is connected with the input terminal Vin2 that the AC power inputs；

One or more equalizer circuits (2), exchange exit of its both ends respectively with the high-voltage inverted module (1) are connected；

One or more transformers (3), its primary side winding respectively with high-voltage inverted module (1) the DC side midpoint and described The midpoint connection of equalizer circuit (2)；

One or more lower pressure rectifier modules (4), its exchange side exit and DC side midpoint respectively with the transformer (3) Vice-side winding connects, and the DC side positive and negative terminal of the multiple lower pressure rectifier module (4) is connected in parallel；

One or more output inverter modules (5), its DC side positive and negative terminal and midpoint with it is straight with lower pressure rectifier module (4) respectively Flow side positive and negative terminal and midpoint connection, its exchange side exit and output end vo 1, Vo2 of the DC side midpoint as the present apparatus.
A kind of 2. electronic potential device according to claim 1, it is characterised in that：The AC power input, is single Phase power frequency AC inputs, its voltage range includes 6 kilovolts, 10,000 volts and 350,000 volts.
A kind of 3. electronic potential device according to claim 1, it is characterised in that：The high-voltage inverted module (1) is It is made of single-phase bridge inverter circuit and the DC filter capacitor being connected in series, the single-phase bridge inverter circuit is by 4 group Ban Conductor switching device is formed by connecting, its semiconductor switch device can be IGBT, MOSFET, IGCT.
A kind of 4. electronic potential device according to claim 1, it is characterised in that：The equalizer circuit (2) is by one It is a to be formed comprising centre tapped shunt inductance.
A kind of 5. electronic potential device according to claim 1, it is characterised in that：The equalizer circuit (2) is by one It is a to be formed comprising centre tapped shunt inductance and two series capacitances, one end of described two series capacitances respectively with electricity in parallel The both ends of sense are connected in series, and the exchange exit of the other end of series capacitance respectively with the high-voltage inverted module (1) is connected, institute The centre cap of shunt inductance is stated to be connected with a primary side winding of the transformer (3).
A kind of 6. electronic potential device according to claim 1, it is characterised in that：The equalizer circuit (2) is by one It is a to be formed comprising centre tapped shunt inductance and two series capacitances, a series inductance, the one of described two series capacitances The both ends respectively with shunt inductance are held to be connected in series, the other end friendship with the high-voltage inverted module (1) respectively of series capacitance Exit connection is flowed, one end of the series inductance and the centre cap of shunt inductance connect, the other end of series inductance and institute State the primary side winding connection of transformer (3).
A kind of 7. electronic potential device according to claim 1, it is characterised in that：The primary side bag of the transformer (3) Containing multiple windings, each winding respectively with high-voltage inverted module (1) the DC side midpoint and the midpoint of the equalizer circuit (2) Connection.
A kind of 8. electronic potential device according to claim 1, it is characterised in that：The lower pressure rectifier module (4) and Exporting inverter module (5) is made of single-phase semi-bridge inversion circuit and the DC filter capacitor being connected in series, the single-phase semi-bridge Inverter circuit is formed by connecting by 2 groups of semiconductor switch devices, its semiconductor switch device can be IGBT, MOSFET, IGCT.