CN109375605B - Energy flow comprehensive measurement and control system and control method - Google Patents
Energy flow comprehensive measurement and control system and control method Download PDFInfo
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- CN109375605B CN109375605B CN201811068001.4A CN201811068001A CN109375605B CN 109375605 B CN109375605 B CN 109375605B CN 201811068001 A CN201811068001 A CN 201811068001A CN 109375605 B CN109375605 B CN 109375605B
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
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Abstract
The invention relates to an energy flow comprehensive measurement and control system, which can realize control application aiming at a plurality of bidirectional DC-DC converter modules and a plurality of loads, and particularly designs a control method based on the system, wherein the control method comprises a single power supply input and multi-load output control method and a multi-power supply input and single-load output control method, can realize flexible switching control of two control methods, simultaneously meets various micro-grid motor and power electronic technology test requirements of motor drive test, battery charge and discharge test, multi-energy-storage-source mixed input test, DC-DC converter topology derivation research, realization of simulation multifunctional electronic loads and programmable power supplies and the like, and has important application prospect in various energy application fields of electric vehicle drive system test, new energy grid-connected power generation, system control, mixed energy storage and the like. In addition, as a universal comprehensive measurement and control system, the system can also be manufactured into universal instruments, teaching and scientific research equipment and the like to provide experimental equipment support for enterprises and scientific research institutions.
Description
Technical Field
The invention relates to an energy flow comprehensive measurement and control system and a control method, and belongs to the technical field of motors and power electronics.
Background
The key technical problem in the fields of electric automobile motor driving systems, new energy power generation systems, micro-grid systems, hybrid energy storage systems, high-voltage motor driving systems, intelligent programmable power supplies and the like is energy transfer and control, and a DC-DC converter is the core for completing energy conversion and transfer.
An electric automobile motor driving system generally adopts a power battery to supply power or a super capacitor or an energy storage system which is formed by mixing and combining the power battery with the super capacitor to supply power, the introduction of a DC-DC converter is necessary in consideration of the difference of the power supply voltage and the bus voltage of a motor power converter, and the access of various energy storage sources also needs to be realized by special topological combination and comprehensive control on the DC-DC converter. The power battery has the charge and discharge function, and the energy can be bidirectional, so the bidirectional converter and the control thereof are the key for realizing the charge and discharge control and the test of the power battery.
The micro-grid system is similar to an electric automobile, and hybrid access, conversion and grid-connected and off-grid control of multiple energy storage sources all need to coordinate distribution and control of a plurality of DC-DC converters.
The high-voltage motor drive needs to boost the direct-current voltage obtained after the battery or alternating-current rectification and filtration, and the design and test of the DC-DC buck-boost converter are also the key points for realizing the drive control of the high-voltage motor.
Derivation and development of DC-DC topologies also requires responsive peripheral test devices, such as multifunctional electronic loads, programmable DC power supplies, etc., to be common test devices.
Therefore, the method meets various technical test requirements of motor drive test, battery charge and discharge test, multi-energy-storage-source mixed input test, topology derivation research of the DC-DC converter, realization of simulated multifunctional electronic load and the like in the application field, and is the key for realizing comprehensive regulation and control through the topological structure and control of the DC-DC converter.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an energy flow comprehensive measurement and control system which can meet the requirements of a plurality of technical tests such as motor drive test, battery charge and discharge test, multi-energy storage hybrid input test, DC-DC converter topology derivation research, realization of analog multifunctional electronic load and the like.
The invention adopts the following technical scheme for solving the technical problems: the invention designs an energy flow comprehensive measurement and control system which comprises n power supplies, n bidirectional DC-DC converter modules and n loads, wherein n is more than or equal to 2;
wherein, n power supplies, n bidirectional DC-DC converter modules and n loads are in one-to-one correspondence in sequence, and each power supply E1i、E2i、…、EniRespectively pass through an air switch K11、K22、…、KnnThe bidirectional DC-DC converter module is connected with the positive input end of the corresponding bidirectional DC-DC converter module; respective power supply E1i、E2i、…、EniAre connected with each other and are respectively butted with the negative input ends of the corresponding bidirectional DC-DC converter modules;
at the same time, the first power supply E1iRespectively pass through an air switch K12、…、K1nRespectively butting the positive input end of the second bidirectional DC-DC converter module to the positive input end of the nth bidirectional DC-DC converter module;
the positive output end of each bidirectional DC-DC converter module is respectively connected with the air switch K01、…、K0nThe positive input end of the corresponding load is connected with the negative input end of the corresponding load; the negative output end of each bidirectional DC-DC converter module is respectively connected with the negative input end of a corresponding load;
meanwhile, the positive output end of the second bidirectional DC-DC converter module to the positive output end of the nth bidirectional DC-DC converter module respectively pass through an air switch K012、…、K01nAnd the positive input end is connected with the first load.
As a preferred technical scheme of the invention: each power supply comprises a battery and an energy storage source which are connected in series.
As a preferred technical scheme of the invention: each bidirectional DC-DC converter module comprises an input end electrolytic capacitor, an inductor, a first switch tube, a first diode, a second switch tube, a second diode and an output end electrolytic capacitor, wherein the anode input end and the cathode input end of each bidirectional DC-DC converter module are respectively butted with the anode and the cathode of the input end electrolytic capacitor; meanwhile, the positive input end of the bidirectional DC-DC converter module is connected with one end of the inductor, and the negative input end of the bidirectional DC-DC converter module is butted with the negative output end of the inductor; the other end of the inductor is respectively connected with the source electrode of the first switch tube, the anode of the first diode, the drain electrode of the second switch tube and the cathode of the second diode; the drain electrode of the first switching tube is butted with the cathode of the first diode and is connected with the anode output end of the bidirectional DC-DC converter module; the source electrode of the second switching tube is butted with the anode of the second diode and is connected with the cathode output end of the bidirectional DC-DC converter module; and the anode and the cathode of the output end electrolytic capacitor are respectively butted with the anode output end and the cathode output end of the bidirectional DC-DC converter module.
As a preferred technical scheme of the invention: the bidirectional DC-DC converter module also comprises voltage sensors respectively arranged between the anode and the cathode of each power supply, current sensors respectively connected with the anode of each power supply in series, and voltage sensors respectively butted between the anode output end and the cathode output end of each bidirectional DC-DC converter module.
Correspondingly, the technical problem to be solved by the invention is to provide a control method of an energy flow comprehensive measurement and control system, which can simultaneously meet various technical test requirements of motor drive test, battery charge and discharge test, multi-energy storage hybrid input test, topology derivation research of a DC-DC converter, realization of simulated multifunctional electronic load and the like.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a control method of an energy flow comprehensive measurement and control system, which comprises a single power supply input and multi-load output control method, wherein the control method comprises the following steps:
control air switch K22、…、KnnAll are in a normally open state and control the air switch K11、K12、…、K1nIs fully closed so that the first power supply E1iAs a common input power source of the first to nth bidirectional DC-DC converter modules;
at the same time, the air switch K is controlled012、…、K01nAll are in a normally open state and control the air switch K01、…、K0nAnd fully closing the first to nth bidirectional DC-DC converter modules to respectively butt the first to nth loads.
As a preferred technical scheme of the invention: the control method also comprises a multi-power-supply input and single-load output control method, and the control method comprises the following steps:
control ofAir switch K12、…、K1nAll are in a normally open state and control the air switch K11、K22、…、KnnIs fully closed so that the first power supply E1iTo the nth power supply EniThe first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module are respectively used as input power supplies;
at the same time, the air switch K is controlled02、…、K0nAll are in a normally open state and control the air switch K01、K012、…、K01nAnd fully closing the first load to enable the first load to be used as a common load of the first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module.
Compared with the prior art, the energy flow comprehensive measurement and control system and the control method have the following technical effects that by adopting the technical scheme:
the energy flow comprehensive measurement and control system can realize control application aiming at a plurality of bidirectional DC-DC converter modules and a plurality of loads, and particularly designs a control method based on the system, wherein the control method comprises a single-power-supply input and multi-load output control method and a multi-power-supply input and single-load output control method, can realize flexible switching control of two control methods, simultaneously meets various micro-grid motor and power electronic technology test requirements of motor drive test, battery charge and discharge test, multi-energy-storage-source mixed input test, DC-DC converter topology derivation research, realization of simulation multifunctional electronic loads and programmable power supplies and the like, and has important application prospects in various energy application fields of electric vehicle drive system test, new energy grid-connected power generation, system control, mixed energy storage and the like. In addition, as a universal comprehensive measurement and control system, the system can also be manufactured into universal instruments, teaching and scientific research equipment and the like to provide experimental equipment support for enterprises and scientific research institutions.
Drawings
FIG. 1 is a schematic diagram of an energy flow comprehensive measurement and control system designed by the invention;
FIG. 2 is a schematic diagram of a single power input, multi-load output energy flow measurement and control system designed according to the present invention;
fig. 3 is a schematic diagram of an energy flow measurement and control system with multiple power supply inputs and single load output designed by the invention.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention designs an energy flow comprehensive measurement and control system, which comprises n power supplies, n bidirectional DC-DC converter modules and n loads, wherein n is more than or equal to 2, as shown in figure 1.
The system comprises n power supplies, n bidirectional DC-DC converter modules and n loads, wherein the n power supplies, the n bidirectional DC-DC converter modules and the n loads sequentially correspond to one another one by one, and each power supply is a battery and an energy storage source which are connected in series with one another; respective power supply E1i、E2i、…、EniRespectively pass through an air switch K11、K22、…、KnnThe bidirectional DC-DC converter module is connected with the positive input end of the corresponding bidirectional DC-DC converter module; respective power supply E1i、E2i、…、EniAre connected with each other and are respectively butted with the negative input ends of each corresponding bidirectional DC-DC converter module.
At the same time, the first power supply E1iRespectively pass through an air switch K12、…、K1nAnd respectively butting the anode input end of the second bidirectional DC-DC converter module to the anode input end of the nth bidirectional DC-DC converter module.
The positive output end of each bidirectional DC-DC converter module is respectively connected with the air switch K01、…、K0nThe positive input end of the corresponding load is connected with the negative input end of the corresponding load; and the negative output end of each bidirectional DC-DC converter module is respectively connected with the negative input end of the corresponding load.
Meanwhile, the positive output end of the second bidirectional DC-DC converter module to the positive output end of the nth bidirectional DC-DC converter module respectively pass through an air switch K012、…、K01nAnd the positive input end is connected with the first load.
The load can be a resistance load and a battery, or a motor is controlled through a frequency converter, or the load is connected to a power grid through a grid-connected inverter.
The bidirectional DC-DC converter module is a boost/buck bidirectional converter or other various bidirectional DC-DC converters, the structure of the specific bidirectional DC-DC converter module is specifically given in the design of the invention, each bidirectional DC-DC converter module respectively comprises an input end electrolytic capacitor, an inductor, a first switch tube, a first diode, a second switch tube, a second diode and an output end electrolytic capacitor, wherein the anode input end and the cathode input end of the bidirectional DC-DC converter module are respectively butted with the anode and the cathode of the input end electrolytic capacitor; meanwhile, the positive input end of the bidirectional DC-DC converter module is connected with one end of the inductor, and the negative input end of the bidirectional DC-DC converter module is butted with the negative output end of the inductor; the other end of the inductor is respectively connected with the source electrode of the first switch tube, the anode of the first diode, the drain electrode of the second switch tube and the cathode of the second diode; the drain electrode of the first switching tube is butted with the cathode of the first diode and is connected with the anode output end of the bidirectional DC-DC converter module; the source electrode of the second switching tube is butted with the anode of the second diode and is connected with the cathode output end of the bidirectional DC-DC converter module; and the anode and the cathode of the output end electrolytic capacitor are respectively butted with the anode output end and the cathode output end of the bidirectional DC-DC converter module.
Based on the designed energy flow comprehensive measurement and control system, the system is further designed to comprise voltage sensors respectively arranged between the positive pole and the negative pole of each power supply, current sensors respectively connected with the positive pole of each power supply in series, and voltage sensors respectively butted between the positive pole output end and the negative pole output end of each bidirectional DC-DC converter module; therefore, the input end of the whole energy flow comprehensive measurement and control system is connected in parallel with a voltage sensor U1i～UniDetecting input terminal voltage, connecting in series to current sensor I1～InDetecting current at input end, and connecting voltage sensor U at output end1o～UnoAnd carrying out output end pressure detection.
Based on the designed energy flow comprehensive measurement and control system, the invention further designs a control method for the energy flow comprehensive measurement and control system, which comprises a single power supply input and multi-load output control method and a multi-power supply input and single-load output control method, wherein as shown in fig. 2, the single power supply input and multi-load output control method comprises the following steps:
control air switch K22、…、KnnAll are in a normally open state and control the air switch K11、K12、…、K1nIs fully closed so that the first power supply E1iAs a common input power source of the first to nth bidirectional DC-DC converter modules;
at the same time, the air switch K is controlled012、…、K01nAll are in a normally open state and control the air switch K01、…、K0nAnd fully closing the first to nth bidirectional DC-DC converter modules to respectively butt the first to nth loads.
The energy flow measurement and control system with single power supply input and multi-load output can realize the test function, and the same input power supply can form a multi-path adjustable power supply through n paths of DC-DC converter modules connected in parallel and can be independently used as a multi-path programmable DC power supply; the load end can be diversified, and the pure resistance load can be used for testing single-phase DC-DC; the battery as a load can be used for testing the charge and discharge performance of the battery and a control method; the load is a frequency converter and a motor, so that a motor driving control system of the electric automobile can be formed, the motor driving control algorithm and performance under various operating conditions of the electric automobile can be tested, and the driving control of a high-voltage motor can be used; the load is a grid-connected inverter, can test a control strategy of the grid-connected inverter, test a new energy grid-connected control method and test the interaction (V2G) function of the electric automobile and a power grid, and can also be used for a vehicle-mounted charging test of a plug-in electric automobile; the combination of each DC-DC converter at the load end can be regarded as an independently controllable electronic load, and can realize constant power, constant resistance, constant current and constant voltage control.
As shown in fig. 3, the multi-power-supply-input, single-load-output control method includes the following steps:
control air switch K12、…、K1nAll are in a normally open state and control the air switch K11、K22、…、KnnIs fully closed so that the first power supply E1iTo the nth power supply EniThe first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module are respectively used as input power supplies;
at the same time, the air switch K is controlled02、…、K0nAll are in a normally open state and control the air switch K01、K012、…、K01nAnd fully closing the first load to enable the first load to be used as a common load of the first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module.
The test function realized by the energy flow measurement and control system with multiple power supply inputs and single load output can realize the test of the access control method of the mixed energy storage source, the mixed energy storage source can be regarded as a multi-component distributed power supply, and the multi-channel DC-DC converter module realizes the common access to the DC bus end to supply power to the load; when the load is a frequency converter and a motor, a test device of a motor driving system of the hybrid electric vehicle can be simulated, and a control algorithm and a performance test of the hybrid electric vehicle under various operating conditions are realized; the load is a grid-connected inverter power grid, the microgrid operation and the grid-connected operation of the new energy distributed power generation can be simulated, and the control algorithm and the performance test under each operation mode are realized.
The designed energy flow comprehensive measurement and control system and the control method comprehensively regulate and control the topological structure and the control method of the DC-DC converter so as to simultaneously meet the test requirements of a plurality of motors and power electronic technologies, such as motor drive test, battery charge and discharge test, multi-energy-storage-source mixed input test, topology derivation research of the DC-DC converter, realization of a simulated multifunctional electronic load and a programmable power supply, and the like, and have important application prospects in the fields of energy application, such as electric vehicle drive system test, new energy grid-connected power generation, micro-grid system control, mixed energy storage, and the like; the device can also be manufactured into universal instruments, teaching and scientific research equipment and the like to provide experimental equipment support for enterprises and scientific research institutions.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (6)
1. The utility model provides an energy flow synthesizes measurement and control system which characterized in that: the system comprises n power supplies, n bidirectional DC-DC converter modules and n loads, wherein n is more than or equal to 2;
wherein, n power supplies, n bidirectional DC-DC converter modules and n loads are in one-to-one correspondence in sequence, and each power supply E1i、E2i、…、EniRespectively pass through an air switch K11、K22、…、KnnThe bidirectional DC-DC converter module is connected with the positive input end of the corresponding bidirectional DC-DC converter module; respective power supply E1i、E2i、…、EniAre connected with each other and are respectively butted with the negative input ends of the corresponding bidirectional DC-DC converter modules;
at the same time, the first power supply E1iRespectively pass through an air switch K12、…、K1nRespectively butting the positive input end of the second bidirectional DC-DC converter module to the positive input end of the nth bidirectional DC-DC converter module;
the positive output end of each bidirectional DC-DC converter module is respectively connected with the air switch K01、…、K0nThe positive input end of the corresponding load is connected with the negative input end of the corresponding load; the negative output end of each bidirectional DC-DC converter module is respectively connected with the negative input end of a corresponding load; meanwhile, the positive output end of the second bidirectional DC-DC converter module to the positive output end of the nth bidirectional DC-DC converter module respectively pass through an air switch K012、…、K01nAnd the positive input end is connected with the first load.
2. The integrated energy flow measurement and control system according to claim 1, characterized in that: each power supply comprises a battery and an energy storage source which are connected in series.
3. The integrated energy flow measurement and control system according to claim 1, characterized in that: each bidirectional DC-DC converter module comprises an input end electrolytic capacitor, an inductor, a first switch tube, a first diode, a second switch tube, a second diode and an output end electrolytic capacitor, wherein the anode input end and the cathode input end of each bidirectional DC-DC converter module are respectively butted with the anode and the cathode of the input end electrolytic capacitor; meanwhile, the positive input end of the bidirectional DC-DC converter module is connected with one end of the inductor, and the negative input end of the bidirectional DC-DC converter module is butted with the negative output end of the inductor; the other end of the inductor is respectively connected with the source electrode of the first switch tube, the anode of the first diode, the drain electrode of the second switch tube and the cathode of the second diode; the drain electrode of the first switching tube is butted with the cathode of the first diode and is connected with the anode output end of the bidirectional DC-DC converter module; the source electrode of the second switching tube is butted with the anode of the second diode and is connected with the cathode output end of the bidirectional DC-DC converter module; and the anode and the cathode of the output end electrolytic capacitor are respectively butted with the anode output end and the cathode output end of the bidirectional DC-DC converter module.
4. The integrated energy flow measurement and control system according to claim 1, characterized in that: the bidirectional DC-DC converter module also comprises voltage sensors respectively arranged between the anode and the cathode of each power supply, current sensors respectively connected with the anode of each power supply in series, and voltage sensors respectively butted between the anode output end and the cathode output end of each bidirectional DC-DC converter module.
5. A control method for the energy flow comprehensive measurement and control system according to any one of claims 1 to 4 is characterized in that: the control method comprises a single power input and multi-load output control method, and comprises the following steps:
control air switch K22、…、KnnAll are in a normally open state and control the air switch K11、K12、…、K1nIs fully closed so that the first power supply E1iAs a common input power source of the first to nth bidirectional DC-DC converter modules;
at the same time, the air switch K is controlled012、…、K01nAll are in a normally open state and control the air switch K01、…、K0nFully closing the first to nth bidirectional DC-DC converter modulesAnd respectively connecting the first load to the nth load to the DC-DC converter module.
6. The control method for the energy flow comprehensive measurement and control system according to claim 5, characterized in that: the control method also comprises a multi-power-supply input and single-load output control method, and the control method comprises the following steps:
control air switch K12、…、K1nAll are in a normally open state and control the air switch K11、K22、…、KnnIs fully closed so that the first power supply E1iTo the nth power supply EniThe first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module are respectively used as input power supplies;
at the same time, the air switch K is controlled02、…、K0nAll are in a normally open state and control the air switch K01、K012、…、K01nAnd fully closing the first load to enable the first load to be used as a common load of the first bidirectional DC-DC converter module to the nth bidirectional DC-DC converter module.
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| WO2022053146A1 (en) * | 2020-09-11 | 2022-03-17 | Toyota Motor Europe | Multi-phase modular composite bidirectional dc/dc converter with reduced number of power switches |
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| CN116404880B (en) * | 2023-04-04 | 2023-12-26 | 北京龙腾云海科技股份有限公司 | Efficient power supply system based on multi-path switch power supply parallel connection |
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