CN218124317U - Energy router and electric power system - Google Patents

Abstract

The utility model discloses an energy router and electric power system. Wherein, this energy router includes: the first terminal is used for connecting the positive pole of the energy storage battery; the second terminal, the third terminal and the fourth terminal are respectively connected with a three-phase input end of an alternating current power grid or respectively connected with anodes of the three photovoltaic power generation modules; the fifth terminal is used for connecting one of the negative electrode of the energy storage battery, the zero line of the alternating current power grid and the negative electrode of the photovoltaic power generation module; and the first end of the switching module is connected with the rectifying module, and the second end of the switching module is respectively connected with the first terminal, the second terminal, the third terminal and the fourth terminal and is used for controlling whether the first terminal, the second terminal, the third terminal and the fourth terminal are conducted or not according to the control instruction. Through the utility model discloses, can realize through three kinds of functions of same integrated photovoltaic DC of hardware conversion, energy storage DC conversion and electric wire netting conversion, practice thrift the hardware cost.

Description

Energy router and electric power system

Technical Field

The utility model relates to an electron electric power technology field particularly, relates to an energy router and electric power system.

Background

At present, in a novel power system taking new energy as a main body, photovoltaic power generation, energy storage and standby power and power grid cooperative power supply are very important components, fig. 1 is a structural diagram of an existing photovoltaic DC/DC converter, fig. 2 is a structural diagram of an existing energy storage DC/DC converter, and fig. 3 is a structural diagram of an existing converter.

Aiming at the problem that after the hardware structure of a converter in a power system in the prior art is determined, the functions of the converter are determined and can not be flexibly switched to other functions, an effective solution is not provided at present.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an in provide an energy router and electric power system to after the converter hardware structure among the electric power system confirms among the solution prior art, its function just confirms, can't switch in a flexible way for the problem of other functions.

In order to solve the technical problem, the utility model provides an energy router, wherein, energy router includes:

the first terminal is used for connecting the positive pole of the energy storage battery;

the second terminal, the third terminal and the fourth terminal are respectively connected with a three-phase input end of an alternating current power grid or respectively connected with anodes of the three photovoltaic power generation modules;

the fifth terminal is used for connecting one of the negative electrode of the energy storage battery, the zero line of the alternating current power grid and the negative electrode of the photovoltaic power generation module;

and a switching module, a first end of which is connected to the rectifying module, and a second end of which is connected to the first terminal, the second terminal, the third terminal and the fourth terminal, respectively, and is configured to control whether the first terminal, the second terminal, the third terminal and the fourth terminal are turned on or not according to a control instruction.

Further, the switching module includes:

a first switch, a first end of which is connected between an upper bridge arm and a lower bridge arm of a first rectifier bridge of the rectifier module, a second end of which is connected with the first terminal, and a third end of which is connected with the second terminal;

a first end of the second switch is connected between an upper bridge arm and a lower bridge arm of a second rectifier bridge of the rectifier module, a second end of the second switch is connected with the first terminal, and a third end of the second switch is connected with the third terminal;

and a first end of the third switch is connected between an upper bridge arm and a lower bridge arm of a third rectifier bridge of the rectifier module, a second end of the third switch is connected with the first terminal, and a third end of the third switch is connected with the fourth terminal.

Further, the first switch, the second switch and the third switch are single-pole double-throw switches.

Further, the energy router further comprises:

a fourth switch disposed between the negative terminal of the rectification module and the fifth terminal.

The utility model also provides an electric power system, including above-mentioned energy router.

Use the technical scheme of the utility model, through switching the module and switching the terminal that switches on in the transducer router, and then control the flexible switch between three kinds of functions of energy router at photovoltaic DC/DC conversion, energy storage DC/DC conversion and electric wire netting conversion, can realize through three kinds of functions of same hardware integration photovoltaic DC/DC conversion, energy storage DC/DC conversion and electric wire netting conversion, practiced thrift the hardware cost.

Drawings

FIG. 1 is a block diagram of a prior art photovoltaic DC/DC converter;

FIG. 2 is a block diagram of a conventional energy storage DC/DC converter;

fig. 3 is a structural diagram of a conventional converter;

fig. 4 is a block diagram of an energy router according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used to describe the switches in the embodiments of the present invention, the switches should not be limited to these terms. These terms are only used to distinguish between switches in different positions. For example, a first switch may also be referred to as a second switch, and similarly, a second switch may also be referred to as a first switch, without departing from the scope of embodiments of the present invention.

The words "if", as used herein, may be interpreted as "at \8230; \8230when" or "when 8230; \823030, when" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (a stated condition or event)" may be interpreted as "upon determining" or "in response to determining" or "upon detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are 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 phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or device comprising the element.

The following describes in detail alternative embodiments of the present invention with reference to the accompanying drawings.

Example 1

As shown in fig. 1 mentioned above, the energy storage DC/DC converter includes a high-voltage side direct current input terminal VH +, an output terminal VH-, a high-voltage side main circuit contactor K3, a high-voltage side charging circuit contactor K1, a high-voltage side charging resistor R1, a high-voltage side bus capacitor C1, switching tubes S1 to S6 and inverse parallel diodes D1 to D6 thereof, and an inductor L1 is connected between an emitter of the switching tube S1 and a collector of the switching tube S2; an inductor L2 is connected between an emitter of the switching tube S3 and a collector of the switching tube S4; an inductor L3 is connected between an emitter of the switching tube S5 and a collector of the switching tube S6; the low-voltage side charging circuit comprises a low-voltage side bus capacitor C2, a low-voltage side main circuit contactor K4, a low-voltage side charging circuit contactor K2 and a low-voltage side charging resistor R2; a low-voltage side dc input terminal VL + and an output terminal VL-.

As shown in fig. 2 mentioned above, the photovoltaic DC/DC converter includes a high-side direct-current input terminal VH +, an output terminal VH-, a high-side main circuit contactor K3; the high-voltage side charging circuit comprises a high-voltage side charging circuit contactor K1, a high-voltage side charging resistor R1, a high-voltage side bus capacitor C1, diodes D1, D3 and D5, switching tubes S2, S4 and S6 and diodes D2, D4 and D6 which are reversely connected in parallel with the switching tubes; an inductor L1 is connected between the anode of the diode D1 and the collector of the switching tube S2; an inductor L2 is connected between the anode of the diode D3 and the collector of the switching tube S4; an inductor L3 is connected between the anode of the diode D5 and the collector of the switching tube S6, and the three-way photovoltaic input interface further comprises a three-way photovoltaic input interface PV1+, PV2+, PV3+ and an output terminal PV-.

As shown in fig. 3 mentioned above, the grid converter comprises a high-side direct current input terminal VH +, an output terminal VH-, a high-side main circuit contactor K3, a high-side charging circuit contactor K1, a high-side charging resistor R1; a high-voltage side bus capacitor C1; switching tubes S1 to S6 and diodes D1 to D6 connected in parallel in reverse direction; an inductor L1 is connected between an emitter of the switching tube S1 and a collector of the switching tube S2; an inductor L2 is connected between an emitter of the switching tube S3 and a collector of the switching tube S4; an inductor L3 is connected between an emitter of the switching tube S5 and a collector of the switching tube S6; three-phase ac access terminals R, S, T.

As can be seen from fig. 1 to 3, three systems, namely a photovoltaic DC/DC converter, an energy storage DC/DC converter and a grid converter, realize different functions through different structures, and after the hardware structure of the converter in the power system is determined, the functions are determined, and the converter cannot be flexibly switched to other functions, which results in the waste of hardware cost.

In order to solve the above problem, this embodiment provides an energy router, fig. 4 is a structural diagram of an energy router according to an embodiment of the present invention, as shown in fig. 4, the energy router includes: the first terminal VL + is used for connecting the positive electrode of the energy storage battery; the second terminal PV1+/R, the third terminal PV2+/S and the fourth terminal PV3+/T are used for being respectively connected with a three-phase input end of an alternating current power grid or respectively connected with anodes of three photovoltaic power generation modules; the fifth terminal VL-/PV-is used for connecting one of the negative electrode of the energy storage battery, the zero line of the alternating current power grid and the negative electrode of the photovoltaic power generation module; a first end of the switching module 10 is connected to the rectifying module 20, and a second end thereof is connected to the first terminal VL +, the second terminal PV1+/R, the third terminal PV2+/S, and the fourth terminal PV3+/T, respectively, and is configured to receive a control instruction of a control chip, and control whether the first terminal VL +, the second terminal PV1+/R, the third terminal PV2+/S, and the fourth terminal PV3+/T are turned on or off according to the control instruction.

According to the energy router, the terminal conducted in the energy router is switched through the switching module, so that the energy router is controlled to be flexibly switched among three functions of photovoltaic DC/DC conversion, energy storage DC/DC conversion and power grid conversion, the three functions of photovoltaic DC/DC conversion, energy storage DC/DC conversion and power grid conversion can be integrated through the same hardware, and the hardware cost is saved.

As shown in fig. 4, the switching module 10 includes: a first switch K5 having a first end connected between the upper and lower arms of the first rectifier bridge of the rectifier module 20, a second end connected to the first terminal VL +, and a third end connected to the second terminal PV1+/R; a second switch K6, a first end of which is connected between the upper and lower bridge arms of the second rectifier bridge of the rectifier module 20, a second end of which is connected with the first terminal VL +, and a third end of which is connected with the third terminal PV2+/S; a first end of the third switch K7 is connected between the upper and lower bridge arms of the third rectifier bridge of the rectifier module 20, a second end is connected to the first terminal VL +, and a third end is connected to the fourth terminal PV3+/T.

In order to realize the switching function, the first switch K5, the second switch K6 and the third switch are single-pole double-throw switches, specifically, single-pole double-throw relays, a fixed contact of the first relay is connected between an upper bridge arm and a lower bridge arm of a first rectifier bridge of the rectifier module 20 through an inductor L1, a first movable contact 1 is connected with the first terminal VL +, and a second movable contact 2 is connected with the second terminal PV1+/R; a fixed contact of the second relay is connected between an upper bridge arm and a lower bridge arm of a second rectifier bridge of the rectifier module 20 through an inductor L2, a first movable contact 1 is connected with a first terminal VL +, and a second movable contact 2 is connected with a third terminal PV2+/S; a static contact of the third relay is connected between an upper bridge arm and a lower bridge arm of a third rectifier bridge of the rectifier module 20 through an inductor L3, a first movable contact 1 is connected with the first terminal VL +, and a second movable contact 2 is connected with a fourth terminal PV3+/T.

In order to control whether the fifth terminal is turned on, the energy router further includes: and a fourth switch K8 disposed between the negative terminal of the rectification module 20 and the fifth terminal VL-/PV-.

In summary, the energy router of the present embodiment includes: a high-voltage side direct current input terminal VH +, an output terminal VH-, switching tubes S1 to S6 and diodes D1 to D6 connected in parallel in an opposite direction, and an inductor L1 is connected between an emitter of the switching tube S1 and a collector of the switching tube S2; an inductor L2 is connected between an emitter of the switching tube S3 and a collector of the switching tube S4; an inductor L3 is connected between the emitter of the switching tube S5 and the collector of the switching tube S6; the right sides of the inductors L1-L3 are respectively connected with static contacts of a first switch K5, a second switch K6 and a second switch K7; a fourth switch K8 is connected with the common emitter of the switching tubes S2, S4 and S6; the low-voltage side direct current terminal includes: the first terminal VL + is used for connecting the positive electrode of the energy storage battery; the second terminal PV1+/R, the third terminal PV2+/S and the fourth terminal PV3+/T are used for being respectively connected with a three-phase input end of an alternating current power grid or respectively connected with anodes of three photovoltaic power generation modules; and the fifth terminal VL-/PV-is used for connecting more than one of the negative electrode of the energy storage battery, the zero line of the alternating current power grid and the negative electrode of the photovoltaic power generation module, wherein the first switch K5, the second switch K6 and the second switch K7 are single-pole double-throw relays.

Example 2

The embodiment provides an electric power system, which comprises the energy router in the embodiment, and is used for realizing the integration of three functions of photovoltaic DC/DC conversion, energy storage DC/DC conversion and power grid conversion through the same hardware, so that the hardware cost is saved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (5)

1. An energy router, the energy router comprising:

the first terminal is used for connecting the positive pole of the energy storage battery;

the second terminal, the third terminal and the fourth terminal are respectively connected with a three-phase input end of an alternating current power grid or respectively connected with anodes of the three photovoltaic power generation modules;

the fifth terminal is used for connecting one of the negative electrode of the energy storage battery, the zero line of the alternating current power grid and the negative electrode of the photovoltaic power generation module;

and a switching module, a first end of which is connected to the rectifying module, and a second end of which is connected to the first terminal, the second terminal, the third terminal and the fourth terminal, respectively, and is configured to control whether the first terminal, the second terminal, the third terminal and the fourth terminal are turned on or off according to a control instruction.

2. The energy router of claim 1, wherein the handover module comprises:

a first switch, a first end of which is connected between an upper bridge arm and a lower bridge arm of a first rectifier bridge of the rectifier module, a second end of which is connected with the first terminal, and a third end of which is connected with the second terminal;

a first end of the second switch is connected between an upper bridge arm and a lower bridge arm of a second rectifier bridge of the rectifier module, a second end of the second switch is connected with the first terminal, and a third end of the second switch is connected with the third terminal;

and a first end of the third switch is connected between the upper bridge arm and the lower bridge arm of a third rectifier bridge of the rectifier module, a second end of the third switch is connected with the first terminal, and a third end of the third switch is connected with the fourth terminal.

3. The energy router of claim 2, wherein the first, second, and third switches are single pole, double throw switches.

4. The energy router of claim 1, further comprising:

a fourth switch disposed between the negative terminal of the rectification module and the fifth terminal.

5. A power system comprising the energy router of any one of claims 1-4.

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