An emergency power supply system integrating a fuel generator and a battery

Abstract

The application relates to a fuel generator and battery integrated emergency power supply system and relates to the power supply field. The system comprises two three-phase full-control rectifier bridges, a fuel generator, a battery, two relays, a circuit breaker, a first switch tube, a second switch tube and an inductor. The first three-phase full-control rectifier bridge is used for power supply for a load. The first switch tube, the second switch tube and the inductor constitute a voltage transformation circuit. The first three-phase full-control rectifier bridge, the fuel generator, the second three-phase full-control rectifier bridge and the voltage transformation circuit are connected in parallel. The first three-phase full-control rectifier bridge is connected with the fuel generator and the voltage transformation circuit through the first relay and the second relay, and the switching of the battery separate power supply mode, the fuel generator separate power supply mode and the mixed power supply mode is realized. The application reduces the cost and the occupied volume.

Description

Technical Field

[0001] This invention relates to the field of emergency power supply technology, and in particular to an emergency power supply system integrating a fuel generator and a battery. Background Technology

[0002] Currently, fuel-powered generators are the primary form of emergency power supply. However, fuel-powered generators suffer from slow start-up and high start-stop costs, making them unsuitable for sudden, short-term power supply scenarios. Batteries, due to their flexible control and fast response, can serve as a good supplement to fuel-powered generators in short-term power supply situations. However, configuring an additional battery system for a fuel-powered emergency power supply system requires additional power electronic circuits and corresponding inductor and capacitor components, resulting in additional cost and space occupation, which is not suitable for the application scenarios of emergency power supply systems. Summary of the Invention

[0003] The purpose of this invention is to provide an emergency power supply system that integrates a fuel generator and a battery, reducing costs and space requirements.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] An integrated emergency power supply system for a fuel generator and a battery includes a first three-phase fully controlled rectifier bridge, a second three-phase fully controlled rectifier bridge, a fuel generator, a battery, a first relay, a second relay, a circuit breaker, a first switching transistor, a second switching transistor, and an inductor.

[0006] The first three-phase fully controlled rectifier bridge outputs three-phase power to supply the load. The first terminal of the first relay is connected to the first input terminal of the first three-phase fully controlled rectifier bridge. The second terminal of the first relay is connected to the first terminal of the second relay. The third terminal of the first relay is connected to the neutral point of the fuel generator. The three-phase terminals of the fuel generator are connected to the output terminal of the second three-phase fully controlled rectifier bridge. The first input terminal of the second three-phase fully controlled rectifier bridge is connected to the third terminal of the second relay. The third terminal of the second relay is also connected to the collector of the first switching transistor. The emitter of the first switching transistor is connected to the collector of the second switching transistor and one end of the inductor. The other end of the inductor is connected to the second terminal of the second relay and the first terminal of the circuit breaker. The second terminal of the circuit breaker is connected to the positive terminal of the battery. The negative terminal of the battery is connected to the emitter of the second switching transistor, the second input terminal of the first three-phase fully controlled rectifier bridge, and the second input terminal of the second three-phase fully controlled rectifier bridge.

[0007] The integrated emergency power supply system of fuel generator and battery includes battery-only power supply mode, fuel generator-only power supply mode and hybrid power supply mode;

[0008] In the battery-only power supply mode, the first terminal and the third terminal of the first relay are closed, the first terminal and the second terminal of the second relay are closed, and the circuit breaker is closed.

[0009] In the fuel generator-only power supply mode, the first terminal and the second terminal of the first relay are closed, the first terminal and the second terminal of the second relay are closed, and the circuit breaker is opened;

[0010] In the hybrid power supply mode, the first terminal and the second terminal of the first relay are closed, the first terminal and the third terminal of the second relay are closed, and the circuit breaker is closed.

[0011] Optionally, an integrated emergency power supply system for a fuel generator and a battery further includes a first capacitor, one end of which is connected to the neutral point of the fuel generator and the other end of which is connected to the negative terminal of the battery.

[0012] Optionally, an integrated emergency power supply system for a fuel generator and a battery further includes a second capacitor, one end of which is connected to the third terminal of the second relay, and the other end of which is connected to the negative terminal of the battery.

[0013] Optionally, the fuel generator is an open-winding type fuel generator.

[0014] Optionally, the first three-phase fully controlled rectifier bridge includes a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, and an eighth switch.

[0015] The collectors of the third, fourth, and fifth switching transistors are all connected to the first terminal of the first relay. The emitter of the third switching transistor is connected to the collector of the sixth switching transistor, the emitter of the fourth switching transistor is connected to the collector of the seventh switching transistor, and the emitter of the fifth switching transistor is connected to the collector of the eighth switching transistor. The emitters of the sixth, seventh, and eighth switching transistors are all connected to the negative terminal of the electrode.

[0016] Optionally, the second three-phase fully controlled rectifier bridge includes a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, and a fourteenth switch.

[0017] The collectors of the ninth, tenth, and eleventh switching transistors are all connected to the third terminal of the second relay. The emitter of the ninth switching transistor is connected to the collector of the twelfth switching transistor, the emitter of the tenth switching transistor is connected to the collector of the thirteenth switching transistor, and the emitter of the eleventh switching transistor is connected to the collector of the fourteenth switching transistor. The emitters of the twelfth, thirteenth, and fourteenth switching transistors are all connected to the negative terminal of the electrode.

[0018] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0019] This invention firstly achieves switching between three power supply modes: fuel generator-only power supply, battery-only power supply, and hybrid power supply, using two relays and a circuit breaker. Secondly, the circuit consisting of an inductor, a first switching transistor, and a second switching transistor is used for boost or buck voltage, achieving a wide transformation ratio output. Furthermore, all the switching transistors in this invention are used in different power supply modes, improving device efficiency and saving cost and space. Finally, in the battery-only power supply mode, the inductor of the fuel generator is reused, eliminating the need for an additional inductor and reducing the system size. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an emergency power supply system integrating a fuel generator and a battery according to the present invention;

[0022] Figure 2 This is a schematic diagram of the integrated emergency power supply system structure in the battery-only power supply mode of the present invention;

[0023] Figure 3 This is a schematic diagram of the integrated emergency power supply system structure in the independent power supply mode of the fuel generator according to the present invention;

[0024] Figure 4 This is a schematic diagram of the integrated emergency power supply system structure under the hybrid power supply mode of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The purpose of this invention is to provide an emergency power supply system that integrates a fuel generator and a battery, reducing costs and space requirements.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of an emergency power supply system integrating a fuel generator and a battery according to the present invention. Figure 1 As shown, an integrated emergency power supply system for a fuel generator and a battery includes a first three-phase fully controlled rectifier bridge, a second three-phase fully controlled rectifier bridge, a fuel generator A, a battery B, a first relay K1, a second relay K2, a circuit breaker K3, a first switch S1, a second switch S2, an inductor L, a first capacitor C1, and a second capacitor C2.

[0029] The output of the first three-phase fully controlled rectifier bridge provides three-phase power to the load. The first terminal (terminal 1) of the first relay K1 is connected to the first input terminal of the first three-phase fully controlled rectifier bridge. The second terminal (terminal 2) of the first relay K1 is connected to the first terminal (terminal 1) of the second relay K2. The third terminal (terminal 3) of the first relay K1 is connected to the neutral point of the fuel generator A. The three-phase terminals of the fuel generator A are connected to the output terminal of the second three-phase fully controlled rectifier bridge. The first input terminal of the second three-phase fully controlled rectifier bridge is connected to the third terminal (terminal 3) of the second relay K2. The third terminal of the second relay K2 is also connected to the collector of the first switching transistor S1. The emitter of the first switching transistor S1 is connected to the collector of the second switching transistor S2 and one end of the inductor L. The other end of the inductor L is connected to the second terminal (terminal 2) of the second relay K2 and the first terminal of the circuit breaker K3. The second terminal of the circuit breaker K3 is connected to the positive terminal of the battery B. The negative terminal (negative DC bus N) of the battery B is connected to the emitter of the second switching transistor S2, the second input terminal of the first three-phase fully controlled rectifier bridge and the second input terminal of the second three-phase fully controlled rectifier bridge.

[0030] The first switch S1 and the second switch S2 form a bridge arm, which, together with the inductor L, is used as a boost circuit in battery-only power supply mode and hybrid power supply mode, and as a buck circuit in fuel generator-only power supply mode.

[0031] Fuel generator A is an open-winding type fuel generator A. The open-winding type fuel generator A is used as a generator in fuel generator standalone power supply mode and mixed power supply mode, and as an inductor in battery standalone power supply mode.

[0032] This invention discloses an integrated emergency power supply system combining a fuel generator and a battery for providing emergency power to a load. A first three-phase fully controlled rectifier bridge converts electrical energy into three-phase power to supply the load. A second three-phase fully controlled rectifier bridge controls the power flow direction.

[0033] One end of the first capacitor C1 is connected to the neutral point of the fuel generator A, and the other end is connected to the negative terminal of the battery B. The first capacitor C1 is used for voltage stabilization.

[0034] One end of the second capacitor C2 is connected to the third terminal of the second relay K2, and the other end is connected to the negative terminal of the battery B.

[0035] The first three-phase fully controlled rectifier bridge includes the third switch S3, the fourth switch S4, the fifth switch S5, the sixth switch S6, the seventh switch S7, and the eighth switch S8.

[0036] The collectors of the third switch S3, the fourth switch S4, and the fifth switch S5 are all connected to the first terminal of the first relay K1. The emitter of the third switch S3 is connected to the collector of the sixth switch S6. The emitter of the fourth switch S4 is connected to the collector of the seventh switch S7. The emitter of the fifth switch S5 is connected to the collector of the eighth switch S8. The emitters of the sixth switch S6, the seventh switch S7, and the eighth switch S8 are all connected to the negative terminal of the electrode.

[0037] The emitter of the third switch S3 is connected to the collector of the sixth switch S6 at point m1, the emitter of the fourth switch S4 is connected to the collector of the seventh switch S7 at point m2, and the emitter of the fifth switch S5 is connected to the collector of the eighth switch S8 at point m3. Points m1, m2, and m3 are respectively connected to the three-phase load.

[0038] The emitter of the ninth switch S9 is connected to the collector of the twelfth switch S12 at point m4, the emitter of the tenth switch S10 is connected to the collector of the thirteenth switch S13 at point m5, and the emitter of the eleventh switch S11 is connected to the collector of the fourteenth switch S14 at point m6. Points m4, m5, and m6 are respectively connected to the three-phase terminals of the fuel generator A.

[0039] The second three-phase fully controlled rectifier bridge includes the ninth switch S9, the tenth switch S10, the eleventh switch S11, the twelfth switch S12, the thirteenth switch S13, and the fourteenth switch S14.

[0040] The collectors of the ninth switch S9, the tenth switch S10, and the eleventh switch S11 are all connected to the third terminal of the second relay K2. The emitter of the ninth switch S9 is connected to the collector of the twelfth switch S12, the emitter of the tenth switch S10 is connected to the collector of the thirteenth switch S13, the emitter of the eleventh switch S11 is connected to the collector of the fourteenth switch S14, and the emitters of the twelfth switch S12, the thirteenth switch S13, and the fourteenth switch S14 are all connected to the negative terminal of the electrode.

[0041] The integrated emergency power supply system of fuel generator and battery includes battery-only power supply mode, fuel generator-only power supply mode and hybrid power supply mode. The hybrid power supply mode is the mode in which the battery and fuel generator work together to supply power.

[0042] like Figure 2 As shown, in the battery-only power supply mode, the first terminal and the third terminal of the first relay K1 are closed, the first terminal and the second terminal of the second relay K2 are closed, and the circuit breaker K3 is closed.

[0043] In battery-only power supply mode, battery B is used to provide emergency power; inductor L, first switch S1 and second switch S2 operate in boost circuit mode; the second three-phase fully controlled rectifier bridge operates in triple-interleaved mode; fuel generator A is used as inductor L of the converter; the first three-phase fully controlled rectifier bridge operates in inverter mode.

[0044] In the battery-only power supply mode, the energy flow direction is from battery B to inductor L, then to the boost circuit composed of the first switch S1 and the second switch S2, then to the second three-phase fully controlled rectifier bridge, then to the fuel generator A, then to the first three-phase fully controlled rectifier bridge, and finally to supply power to the load.

[0045] like Figure 3 As shown, in the fuel generator-only power supply mode, the first terminal and the second terminal of the first relay K1 are closed, the first terminal and the second terminal of the second relay K2 are closed, and the circuit breaker K3 is opened.

[0046] In the fuel generator standalone power supply mode, fuel generator A is used to provide emergency power; the second three-phase fully controlled rectifier bridge operates in rectification mode; inductor L, first switch S1 and second switch S2 operate in buck circuit mode; and the first three-phase fully controlled rectifier bridge operates in inverter mode.

[0047] In the stand-alone power supply mode of the fuel generator, the energy flow direction is as follows: fuel generator A to the second three-phase fully controlled rectifier bridge, then to inductor L, the step-down circuit composed of the first switch S1 and the second switch S2, then to the first three-phase fully controlled rectifier bridge, and finally to supply power to the load.

[0048] like Figure 4 As shown, in the hybrid power supply mode, the first terminal and the second terminal of the first relay K1 are closed, the first terminal and the third terminal of the second relay K2 are closed, and the circuit breaker K3 is closed.

[0049] In the hybrid power supply mode, the fuel generator A and battery B are used to provide emergency power; the second three-phase fully controlled rectifier bridge operates in rectification mode; the inductor L, the first switch S1 and the second switch S2 operate in boost circuit mode; and the first three-phase fully controlled rectifier bridge operates in inverter mode.

[0050] In the stand-alone power supply mode of the fuel generator, the energy flow direction is as follows: fuel generator A to the second three-phase fully controlled rectifier bridge, then to the first three-phase fully controlled rectifier bridge, and finally to supply power to the load; battery B to inductor L, the boost circuit composed of the first switch S1 and the second switch S2, then to the first three-phase fully controlled rectifier bridge, and finally to supply power to the load.

[0051] This invention integrates a fuel generator system and a battery system for emergency power supply. First, by configuring two relay switches (K1, K2) and a circuit breaker (K3), three modes are switched, enabling separate emergency power supply from the fuel generator, separate emergency power supply from the battery, and a hybrid emergency power supply. Second, the inductor L, the first switch, and the second switch form a circuit used for boost or buck modes, achieving a wide transformation ratio output. Third, all switches in this invention are utilized in different power supply modes, improving device efficiency and saving cost and space. Finally, in the battery-only power supply mode, the inductor of the fuel generator is reused, eliminating the need for an additional inductor and reducing the system size.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An emergency power supply system integrating a fuel generator and a battery, characterized in that, It includes a first three-phase fully controlled rectifier bridge, a second three-phase fully controlled rectifier bridge, a fuel generator, a battery, a first relay, a second relay, a circuit breaker, a first switching transistor, a second switching transistor, and an inductor; The first three-phase fully controlled rectifier bridge outputs three-phase power to supply the load. The first terminal of the first relay is connected to the first input terminal of the first three-phase fully controlled rectifier bridge. The second terminal of the first relay is connected to the first terminal of the second relay. The third terminal of the first relay is connected to the neutral point of the fuel generator. The three-phase terminals of the fuel generator are connected to the output terminal of the second three-phase fully controlled rectifier bridge. The first input terminal of the second three-phase fully controlled rectifier bridge is connected to the third terminal of the second relay. The third terminal of the second relay is also connected to the collector of the first switching transistor. The emitter of the first switching transistor is connected to the collector of the second switching transistor and one end of the inductor. The other end of the inductor is connected to the second terminal of the second relay and the first terminal of the circuit breaker. The second terminal of the circuit breaker is connected to the positive terminal of the battery. The negative terminal of the battery is connected to the emitter of the second switching transistor, the second input terminal of the first three-phase fully controlled rectifier bridge, and the second input terminal of the second three-phase fully controlled rectifier bridge. The integrated emergency power supply system of fuel generator and battery includes battery-only power supply mode, fuel generator-only power supply mode and hybrid power supply mode; In the battery-only power supply mode, the first terminal and the third terminal of the first relay are closed, the first terminal and the second terminal of the second relay are closed, and the circuit breaker is closed; In the fuel generator-only power supply mode, the first terminal and the second terminal of the first relay are closed, the first terminal and the second terminal of the second relay are closed, and the circuit breaker is opened; In the hybrid power supply mode, the first terminal and the second terminal of the first relay are closed, the first terminal and the third terminal of the second relay are closed, and the circuit breaker is closed.

2. The integrated emergency power supply system of fuel generator and battery according to claim 1, characterized in that, It also includes a first capacitor, one end of which is connected to the neutral point of the fuel generator, and the other end is connected to the negative terminal of the battery.

3. The integrated emergency power supply system of fuel generator and battery according to claim 1, characterized in that, It also includes a second capacitor, one end of which is connected to the third terminal of the second relay, and the other end is connected to the negative terminal of the battery.

4. The integrated emergency power supply system of fuel generator and battery according to claim 1, characterized in that, The fuel generator is an open-winding type fuel generator.

5. The integrated emergency power supply system of fuel generator and battery according to claim 1, characterized in that, The first three-phase fully controlled rectifier bridge includes a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, and an eighth switch; The collectors of the third, fourth, and fifth switching transistors are all connected to the first terminal of the first relay. The emitter of the third switching transistor is connected to the collector of the sixth switching transistor, the emitter of the fourth switching transistor is connected to the collector of the seventh switching transistor, and the emitter of the fifth switching transistor is connected to the collector of the eighth switching transistor. The emitters of the sixth, seventh, and eighth switching transistors are all connected to the negative terminal of the electrode.

6. The integrated emergency power supply system of fuel generator and battery according to claim 1, characterized in that, The second three-phase fully controlled rectifier bridge includes a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, and a fourteenth switch; The collectors of the ninth, tenth, and eleventh switching transistors are all connected to the third terminal of the second relay. The emitter of the ninth switching transistor is connected to the collector of the twelfth switching transistor, the emitter of the tenth switching transistor is connected to the collector of the thirteenth switching transistor, and the emitter of the eleventh switching transistor is connected to the collector of the fourteenth switching transistor. The emitters of the twelfth, thirteenth, and fourteenth switching transistors are all connected to the negative terminal of the electrode.

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