CN209516968U - High energy efficiency adaptive input type feedback power system - Google Patents
High energy efficiency adaptive input type feedback power system Download PDFInfo
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- CN209516968U CN209516968U CN201821987959.9U CN201821987959U CN209516968U CN 209516968 U CN209516968 U CN 209516968U CN 201821987959 U CN201821987959 U CN 201821987959U CN 209516968 U CN209516968 U CN 209516968U
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Abstract
The utility model discloses a kind of high energy efficiency adaptive input type feedback power systems, it include: that adaptive parallel network reverse unit is equipped with output end and ac input end, output end sequentially with pre- steady unit is isolated, buck adjustment unit is electrically connected, the output end of buck adjustment unit connects measurand；Embedded control unit respectively with adaptive parallel network reverse unit, be isolated pre- steady unit, buck adjustment unit be electrically connected, can set, acquire and control each unit；Man-machine interaction unit and external interface unit are electrically connected with embedded control unit respectively.The system circuit kit realizes power supply and loading functional simultaneously, and small in size, system is simple；Adaptive single-phase or three-phase alternating current input and grid-connected output improve system suitability without switching by hand；Same set of closed-loop control can achieve seamless power supply and loading functional switching, dead zone voltage be not present, and may improve output accuracy and response speed.
Description
Technical Field
The utility model relates to a DC power supply, electronic load equipment field especially relate to an input type repayment electrical power generating system of high energy efficiency self-adaptation.
Background
Various high-precision direct-current stable power supplies are used in radar, missile, vehicle-mounted (ship-based and airborne) equipment, military communication, measurement control and other military equipment; various types of electronic loads are required for occasions such as power supply development, maintenance guarantee, metering test and the like in weaponry.
The requirement of military scientific research and production units and troops in China on the high-energy-efficiency self-adaptive input type feedback power supply system is very urgent. In the past, a conventional direct current stabilized power supply and a direct current electronic load are respectively two sets of equipment, wherein the electronic load adopts a linear scheme and energy consumption devices. However, the two have the following problems when used in a set: 1) large volume and system congestion; 2) the electric energy is converted into heat and wasted; 3) the two sets of equipment and control cannot achieve seamless power supply and load function switching; 4) The AC input and output sides do not have single-phase three-phase adaptivity; 5) 50/60Hz and 400Hz AC inputs and outputs are incompatible. Therefore, how to solve the above problems is to provide an energy-efficient feedback power supply system, which is a problem that needs to be solved urgently in the field of military testing.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing an energy-efficient self-adaptation input type repayment electrical power generating system can reach seamless power and load function and switch, does not have the blind spot voltage to probably improve output accuracy and response speed.
The utility model aims at realizing through the following technical scheme:
the utility model discloses embodiment provides an energy-efficient self-adaptation input type repayment electrical power generating system, include:
the system comprises a self-adaptive grid-connected inversion unit, an isolation pre-stabilization unit, a buck-boost adjustment unit, an embedded control unit, a human-computer interaction unit and an external interface unit; wherein,
the self-adaptive grid-connected inversion unit is provided with an output end and an alternating current input end, the output end is electrically connected with the isolation pre-stabilization unit and the buck-boost adjusting unit in sequence, and the output end of the buck-boost adjusting unit is connected with a tested object;
the embedded control unit is respectively electrically connected with the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit and can set, acquire and control the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit;
the man-machine interaction unit and the external interface unit are respectively electrically connected with the embedded control unit.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a two quadrant feedback electrical power generating system of high energy efficiency self-adaptation input type, its beneficial effect is:
the power supply system has the advantages that the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit which are connected in sequence are arranged, the embedded control unit is matched with the human-computer interaction unit, and the isolation pre-stabilization unit and other units are arranged to be of a bidirectional converter topological structure, so that the power supply system can realize power supply and load functions simultaneously through one set of circuit, not only can convert alternating current into direct current, but also can absorb energy to be fed back to a public power grid or a local power grid, the energy can be recycled, the size of the power supply system is small, and the complexity of the; moreover, the same set of closed-loop control can achieve seamless power supply and load function switching, no dead zone voltage exists, and the output precision and the response speed can be improved; the self-adaptive grid-connected inversion unit can realize self-adaptive single-phase or three-phase alternating current input and grid-connected output without manual switching, and improves the system adaptability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a high-energy-efficiency adaptive input feedback power supply system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a dual-quadrant operation of a feedback power supply system according to an embodiment of the present invention;
fig. 3 is an electrical schematic diagram of an adaptive grid-connected inverter unit of a feedback power supply system according to an embodiment of the present invention;
fig. 4 is a waveform diagram of single-phase input/output voltage and current at the ac side of the feedback power supply system according to an embodiment of the present invention;
fig. 5 is a waveform diagram of three-phase input/output voltage and current at the ac side of the feedback power system according to the embodiment of the present invention;
fig. 6 is an electrical schematic diagram of an isolation pre-stabilization unit of a feedback power supply system according to an embodiment of the present invention;
fig. 7 is an electrical schematic diagram of a buck-boost adjusting unit of the feedback power supply system according to an embodiment of the present invention;
fig. 8 is a schematic block diagram of a human-computer interaction and external interface unit of a feedback power supply system according to an embodiment of the present invention;
fig. 9 is a local display panel diagram of a feedback power supply system according to an embodiment of the present invention.
Fig. 10 is a schematic view of a remote control interface of a feedback power supply system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an energy-efficient adaptive input feedback power supply system, including:
the system comprises a self-adaptive grid-connected inversion unit, an isolation pre-stabilization unit, a buck-boost adjustment unit, an embedded control unit, a human-computer interaction unit and an external interface unit; wherein,
the self-adaptive grid-connected inversion unit is provided with an output end and an alternating current input end, the output end is electrically connected with the isolation pre-stabilization unit and the buck-boost adjusting unit in sequence, and the output end of the buck-boost adjusting unit is connected with the tested object 8;
the embedded control unit is respectively electrically connected with the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit and can set, acquire and control the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit;
the man-machine interaction unit and the external interface unit are respectively electrically connected with the embedded control unit.
Referring to fig. 1, in the power supply system, the adaptive grid-connected inverter unit includes:
the device comprises a filter circuit, a lower programming circuit, a three-phase inverter bridge circuit and an alternating current side access detection circuit; wherein,
the input end of the filter circuit is an alternating current input end, and the output end of the filter circuit is electrically connected with the lower programming circuit and the three-phase inverter bridge circuit in sequence;
the alternating current side access detection circuit and the three-phase inverter bridge circuit are respectively electrically connected with the input end of the filter circuit, the alternating current side access detection circuit is electrically connected with the embedded control unit, and the embedded control unit can control the three-phase inverter bridge circuit to be converted into a corresponding inversion mode according to an alternating current input mode signal detected by the alternating current side access detection circuit.
Specifically, as shown in fig. 3, the circuit of the adaptive grid-connected inverter unit is composed of an ac-side LCL filter and a three-phase half-bridge topology composed of three pairs of IGBT/MOSFET power elements connected behind the filter, and the dc-side voltage of the unit is: 680 Vdc. In the circuit of the self-adaptive grid-connected inverter unit, a full-control power switch replaces a half-control power switch or a diode, and PWM chopping rectification replaces phase-controlled rectification or uncontrolled rectification. The design makes the whole system compatible with the alternating-current side frequency of 50/60Hz and 400 Hz; and the unit comprises an alternating current detection circuit, can detect whether the alternating current side is accessed in a single-phase or three-phase mode, and enables the embedded control unit to control the three half-bridge topology units of the self-adaptive grid-connected inverter unit to work in a corresponding inversion mode according to a detected signal, such as single-phase inversion or three-phase inversion. Particularly, when a user accesses the alternating current side in a zero-fire single-phase mode (namely L, N mode), access information can be preset in the man-machine interaction unit, and after the system detection is finished, the circuit is automatically switched through the relay, and the direct current bus voltage is changed. Fig. 4 shows a waveform diagram of an ac-side single-phase input/output voltage and a waveform diagram of an ac-side three-phase input/output voltage and a current of the feedback power supply system are shown in fig. 5. Specifically, the main power tube in the circuit is an English flying FF200R12KS4, the inductance is 680 mu H, and a C-type amorphous magnetic core of Antai company is selected.
In the feedback power supply system, the isolation pre-stabilization unit includes: the synchronous rectification circuit, the bridge circuit and the input filter circuit; the input end of the synchronous rectification circuit is electrically connected with the output end of the self-adaptive grid-connected inversion unit, and the output end of the synchronous rectification circuit is sequentially connected with the bridge circuit and the input filter circuit.
In the feedback power supply system, the buck-boost adjusting unit includes:
the synchronous rectification circuit, the buck-boost circuit and the input filter circuit; wherein,
the input end of the synchronous rectification circuit is electrically connected with the isolation pre-stabilization unit;
the input end of the synchronous rectification circuit is electrically connected with the boost circuit and the input filter circuit in sequence;
the output end of the input filter circuit is connected with the object to be measured.
In the feedback power system, the embedded control unit includes:
the device comprises a digital PWM module, an accurate synchronous measurement module, an electric energy quality conditioning module, a function waveform generation module, a single-phase and three-phase control module and a grid-connected strategy control module. The functional modules are integrated in the embedded control unit to realize the control function of the embedded control unit. Specifically, the embedded control unit may be composed of a setting circuit, a sampling circuit, a PWM generating circuit, a driving circuit, a protection circuit, and a cascade current-sharing circuit.
In the feedback power system, the human-computer interaction unit includes: the device comprises an interface display module, an encoder control module, a touch key module and a buzzer control module; wherein,
the interface display module, the touch key module and the buzzer control module are respectively electrically connected with the encoder control module.
In the feedback power supply system, the interface display module is provided with an OLED touch display screen, and preferably adopts a 4.3-inch touch display screen.
In the feedback power system, the external interface unit includes: LAN interface, USB interface, RS485 interface, RS232 interface and GPIB interface.
The feedback power supply system further includes: and the self-adaptive grid-connected inverter unit is electrically connected with the embedded control unit and the human-computer interaction unit through the auxiliary power supply circuit 7.
In the power supply system, a self-adaptive grid-connected inversion unit, an isolation pre-stabilization unit and a buck-boost adjustment unit form a power part of the whole power supply system; the man-machine interaction unit is used for managing a man-machine interaction panel of the system, and the external interface unit provides remote communication interfaces such as USB, LAN, GPIB and RS 485.
The embodiments of the present invention will be described in further detail below.
As shown in fig. 1, an embodiment of the present invention provides an energy-efficient adaptive input-type feedback power supply system, which is a comprehensive power supply system capable of implementing both dc output and load energy feedback voltage. The system can be self-adaptive to single-phase or three-phase alternating current input and grid-connected output; the alternating current frequency is compatible with 50/60Hz and 400Hz, and manual switching is not needed; the power supply and load functions are switched seamlessly, and the double-quadrant operation is shown in figure 2, so that the method has strong adaptability; the power supply system includes:
the system comprises a self-adaptive grid-connected inversion unit, an isolation pre-stabilization unit, a buck-boost adjustment unit, an embedded control unit, a human-computer interaction unit and an external interface unit; wherein,
the self-adaptive grid-connected inversion unit is provided with an alternating current input end connected with single-phase or three-phase alternating current, the output end of the self-adaptive grid-connected inversion unit is electrically connected with the isolation pre-stabilization unit and the buck-boost adjusting unit in sequence, and the output end of the buck-boost adjusting unit is connected with a tested object;
the embedded control unit is respectively electrically connected with the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit and provides setting, acquisition and control signals for the units of the three power parts;
the man-machine interaction unit and the external interface unit are electrically connected with the embedded control unit and are used for managing a man-machine interaction panel of the system and remote communication interfaces such as USB, LAN, GPIB, RS485 and the like.
In the feedback power supply system, as shown in fig. 3, the adaptive grid-connected inverter unit is composed of an ac-side LCL filter and a three-phase half-bridge topology composed of three pairs of IGBT/MOSFET power components connected behind the filter, and the dc-side voltage of the unit is: 680 Vdc. In the circuit of the self-adaptive grid-connected inverter unit, a full-control power switch replaces a half-control power switch or a diode, and PWM chopping rectification replaces phase-controlled rectification or uncontrolled rectification. The design makes the whole system compatible with 50/60Hz and 400Hz AC side frequency; and the unit comprises an alternating current detection circuit, and can detect whether the alternating current side is accessed in a single-phase or three-phase mode, so that the information embedded control unit can control the three half-bridge topologies of the self-adaptive grid-connected inverter unit to work in a single-phase inversion or three-phase inversion mode. Particularly, when a user accesses the alternating current side in a zero-fire single-phase mode (namely L, N mode), access information can be preset on the front panel, and after the system detection is finished, the circuit can be automatically switched through the relay, and the direct current bus voltage is changed. Fig. 4 shows a waveform diagram of an ac-side single-phase input/output voltage and a waveform diagram of an ac-side three-phase input/output voltage and a current of the feedback power supply system are shown in fig. 5. Specifically, the main power tube in the circuit is an English flying FF200R12KS4, the inductance is 680 mu H, and a C-type amorphous magnetic core of Antai company is selected.
As shown in fig. 6, in the feedback power supply system, the power circuit of the isolation pre-stabilization unit adopts a pre-stabilization dc output capable of converting the dc output by the adaptive grid-connected inverter unit into a voltage and current dual-loop regulation, and the voltage regulation range is 0 to 1000 Vdc. The main power conversion topology of the isolation pre-stabilization unit adopts a half-bridge or full-bridge bidirectional DCDC topology structure. The design is suitable for occasions where the power supply system feeds power positively or stores energy and feeds negative energy back to a power grid, current can flow in two directions, the function of isolating an alternating current side from a direct current side is achieved, and the advantages are obvious.
As shown in fig. 7, in the feedback power supply system, the power circuit of the buck-boost adjusting unit adopts a buck-boost non-isolated topology structure to realize a bidirectional function. When the power is supplied in the forward direction, the BUCK topology is adopted to provide energy for the tested object; and converting the energy into a BOOST boosting topology during negative energy absorption, boosting the energy of the object to be tested, transmitting the boosted energy to the isolation pre-stabilization unit, and finally feeding the energy back to the power grid for recycling.
In the feedback power supply system, the embedded control unit consists of a setting circuit, a sampling circuit, a PWM generating circuit, a driving circuit, a protection circuit, a cascade circuit and other circuits; the system can be divided into a digital PWM module, an accurate synchronous measurement module, an electric energy quality conditioning module, a function waveform generation module, a single/three-phase control module and a grid-connected strategy control module according to functions. Wherein,
the embedded control unit is electrically connected with the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit, the three power circuit units, the auxiliary power supply electronic unit and a direct current bus of the tested object respectively;
the auxiliary power supply unit is electrically connected with the embedded control unit, the self-adaptive grid-connected inversion unit and the human-computer interaction unit respectively;
the embedded control unit can be realized by adopting a conventional embedded circuit capable of realizing the functions.
As shown in fig. 8, in the feedback power system, the human-computer interaction unit includes: the device comprises an OLED interface display module, an encoder control module, a touch key module and a buzzer control module; the local interface uses a 4.3 inch touch screen, and the local main interface is shown in fig. 9. PID parameter setting, fault and early warning information contained in the embedded control unit are set in a related manner by calling out a hidden interface.
In the feedback power system, the external interface unit includes: LAN interface, USB interface, RS485 interface, RS232 interface and GPIB interface.
As shown in fig. 10, in the feedback power supply system of the present invention, the SCPI standard command set is used for remote interactive application, and is compiled by Labview, and interfaces with different patterns can be set according to actual needs.
The technical conditions of the feedback power supply system are shown in the following table.
The utility model discloses a power supply system has following beneficial effect at least:
1) because each unit is of a bidirectional converter topological structure, one set of circuit can realize the functions of a power supply and a load at the same time, the size is small, and the complexity of the system is reduced;
2) the self-adaptive single-phase or three-phase alternating current input and grid-connected output are realized, manual switching is not needed, and the system adaptability is improved;
3) the same closed-loop control can achieve seamless power supply and load function switching, no dead zone voltage exists, and the output precision and the response speed can be improved;
4) the absorbed energy can be fed back to a public power grid or a local power grid, and the energy can be recycled;
5) the compatibility of 50/60Hz and 400Hz alternating current input and grid-connected output improves the system adaptability.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An energy efficient adaptive input feedback power supply system, comprising:
the system comprises a self-adaptive grid-connected inversion unit, an isolation pre-stabilization unit, a buck-boost adjustment unit, an embedded control unit, a human-computer interaction unit and an external interface unit; wherein,
the self-adaptive grid-connected inversion unit is provided with an output end and an alternating current input end, the output end is electrically connected with the isolation pre-stabilization unit and the buck-boost adjusting unit in sequence, and the output end of the buck-boost adjusting unit is connected with a tested object;
the embedded control unit is respectively electrically connected with the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit and can set, acquire and control the self-adaptive grid-connected inversion unit, the isolation pre-stabilization unit and the buck-boost adjustment unit;
the man-machine interaction unit and the external interface unit are respectively electrically connected with the embedded control unit.
2. The energy-efficient adaptive input-type feedback power supply system according to claim 1, wherein the adaptive grid-connected inverter unit includes:
the device comprises a filter circuit, a lower programming circuit, a three-phase inverter bridge circuit and an alternating current side access detection circuit; wherein,
the input end of the filter circuit is an alternating current input end, and the output end of the filter circuit is electrically connected with the lower programming circuit and the three-phase inverter bridge circuit in sequence;
the alternating current side access detection circuit and the three-phase inverter bridge circuit are respectively electrically connected with the input end of the filter circuit, the alternating current side access detection circuit is electrically connected with the embedded control unit, and the embedded control unit can control the three-phase inverter bridge circuit to be converted into a corresponding inversion mode according to an alternating current input mode signal detected by the alternating current side access detection circuit.
3. The energy-efficient adaptive input-type feedback power supply system according to claim 1 or 2, wherein the isolation pre-stabilization unit includes:
the synchronous rectification circuit, the bridge circuit and the input filter circuit; wherein,
the input end of the synchronous rectification circuit is electrically connected with the output end of the self-adaptive grid-connected inversion unit, and the output end of the synchronous rectification circuit is sequentially connected with the bridge circuit and the input filter circuit.
4. The energy-efficient adaptive input-type feedback power supply system according to claim 1 or 2, wherein the buck-boost adjusting unit includes:
the synchronous rectification circuit, the buck-boost circuit and the input filter circuit; wherein,
the input end of the synchronous rectification circuit is electrically connected with the isolation pre-stabilization unit;
the input end of the synchronous rectification circuit is electrically connected with the boost circuit and the input filter circuit in sequence;
the output end of the input filter circuit is connected with the object to be measured.
5. The energy-efficient adaptive input-type feedback power supply system according to claim 1 or 2, wherein the embedded control unit comprises:
the device comprises a digital PWM module, an accurate synchronous measurement module, an electric energy quality conditioning module, a function waveform generation module, a single-phase control module, a three-phase control module and a grid-connected strategy control module.
6. The energy-efficient adaptive input-type feedback power supply system according to claim 1 or 2, wherein the human-computer interaction unit includes: the device comprises an interface display module, an encoder control module, a touch key module and a buzzer control module; wherein,
the interface display module, the touch key module and the buzzer control module are respectively electrically connected with the encoder control module.
7. The energy-efficient adaptive input-type feedback power supply system according to claim 6, wherein the interface display module is provided with an OLED touch display screen.
8. The energy-efficient adaptive input-type feedback power supply system according to claim 1 or 2, wherein the external interface unit includes: LAN interface, USB interface, RS485 interface, RS232 interface and GPIB interface.
9. The energy efficient adaptive input feedback power supply system according to claim 1 or 2, further comprising: and the self-adaptive grid-connected inverter unit is electrically connected with the embedded control unit and the human-computer interaction unit through the auxiliary power supply circuit.
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| CN109560718B (en) * | 2018-11-29 | 2024-07-23 | 北京大华无线电仪器有限责任公司 | High-energy-efficiency self-adaptive input feedback power supply system |
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