CN111458584A - Automatic energy efficiency test platform and test method for power electronic equipment - Google Patents
Automatic energy efficiency test platform and test method for power electronic equipment Download PDFInfo
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- CN111458584A CN111458584A CN202010299132.4A CN202010299132A CN111458584A CN 111458584 A CN111458584 A CN 111458584A CN 202010299132 A CN202010299132 A CN 202010299132A CN 111458584 A CN111458584 A CN 111458584A
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Abstract
The application discloses an automatic energy efficiency test platform and a test method for power electronic equipment, wherein a direct-current power supply and an alternating-current power supply are respectively provided for the power electronic equipment to be tested from a rectifying device and an isolation transformer module through an alternating-current and direct-current power switch switching module, the power electronic equipment to be tested is scanned and identified through a scanning module, a scanning result is sent to an energy efficiency comprehensive control system, the energy efficiency comprehensive control system is enabled to establish a corresponding energy efficiency test loop for the power electronic equipment to be tested, the power electronic equipment debugging and testing platform is controlled to provide energy efficiency test conditions for the power electronic equipment to be tested, the energy efficiency test process of the power electronic equipment to be tested is monitored and controlled, and an energy efficiency test result of the power electronic. The energy efficiency testing system solves the technical problems that the existing energy efficiency testing system for the power electronic equipment cannot adapt to energy efficiency tests of various power electronic equipment, not only is the investment cost high, but also the resource waste caused by repeated construction exists.
Description
Technical Field
The application relates to the technical field of energy efficiency testing, in particular to an automatic energy efficiency testing platform and an automatic energy efficiency testing method for power electronic equipment.
Background
The energy efficiency test of the power electronic equipment is a means for quantitatively detecting the energy consumption and the electric energy conversion efficiency of the power electronic equipment, and is a necessary inspection link for accessing the power electronic equipment to a power grid.
Although power electronic devices are designed, produced and sold based on mainstream power electronic topology and control strategies, different power electronic device topologies and control strategies are different, rated capacities and voltage grades are different, working parameters are different, model batches of internal components and assembly processes are different, and currently, an energy efficiency testing mode for the power electronic devices is to design a set of energy efficiency testing system and testing method for each power electronic device, so that not only is the investment cost high, but also resource waste of repeated construction exists, and therefore, an automatic testing platform and testing method suitable for energy efficiency testing of various power electronic devices are designed, the technical defects are solved, and the technical problem to be solved urgently by technical staff in the field is solved.
Disclosure of Invention
The application provides an automatic energy efficiency testing platform and an automatic energy efficiency testing method for power electronic equipment, which are used for solving the technical problems that an existing energy efficiency testing system for the power electronic equipment cannot adapt to the energy efficiency testing of various power electronic equipment, the investment cost is high, and the repeated construction resource waste exists.
In view of this, the first aspect of the present application provides an automatic energy efficiency testing platform for power electronic devices, including: the energy efficiency comprehensive control system comprises an energy efficiency comprehensive control system, a power electronic equipment debugging and testing platform, a rectifying device, an alternating current/direct current power switch switching module, an isolation transformer module and a programmable analog load and scanning module;
the rectifying device is used for getting electricity from a three-phase alternating current power grid and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module;
the isolation transformer module is used for getting electricity from the three-phase alternating current power grid, outputting a three-phase adjustable alternating current power supply and providing an alternative alternating current power supply for the alternating current and direct current power supply switch switching module;
the alternating current/direct current power switch switching module is used for getting electricity from the three-phase alternating current power grid or from the output side of the rectifying device through the isolation transformer module and providing an alternating current power supply or a direct current power supply for the power electronic equipment debugging platform;
the programmable analog load is used for simulating an alternating current load or a direct current load of the power electronic equipment to be tested, receiving electric energy output by the power electronic equipment to be tested and feeding back the electric energy to the direct current side;
the power electronic equipment to be tested is installed on the power electronic equipment debugging platform, the energy efficiency test condition of the power electronic equipment to be tested is simulated, and the energy efficiency test is carried out on the power electronic equipment to be tested;
the scanning module is used for scanning and identifying the power electronic equipment to be detected and sending a scanning result to the energy efficiency comprehensive control system;
the energy efficiency comprehensive control system is connected with the rectifying device, the isolation transformer module, the alternating current/direct current power switch switching module, the power electronic equipment debugging platform, the programmable analog load and the scanning module, and is used for constructing an energy efficiency test loop of the power electronic equipment to be tested according to a scanning result of the scanning module, monitoring and controlling an energy efficiency test process of the power electronic equipment to be tested, and generating an energy efficiency test result.
Optionally, the power electronic device debugging platform includes a device-to-be-tested installation module, a modulation strategy module, and a data acquisition card module;
the device installation module to be tested is used for installing the power electronic device to be tested and connecting the power electronic device to be tested with an energy efficiency test circuit;
the modulation strategy module is connected with the equipment installation module to be tested and used for driving a power switch tube of the power electronic equipment to be tested;
the data acquisition card module is used for acquiring an input current signal, an output current signal, an input voltage signal, an output voltage signal and the data of the energy efficiency test condition of the power electronic equipment to be tested, and sending the input current signal, the output current signal, the input voltage signal, the output voltage signal and the data of the energy efficiency test condition to the energy efficiency comprehensive control system.
Optionally, the primary side of the isolation transformer module is connected in parallel with a branch consisting of a contact and a current-limiting resistor, the secondary side provides an adjustable three-phase alternating current, and the transformer winding adopts star-delta connection for isolating impact and interference generated when the power electronic device to be tested is started or stopped.
Optionally, the energy efficiency comprehensive control system comprises a control module, a communication module, a monitoring module and a database module;
the control module is connected with the communication module and used for carrying out data transmission and instruction sending through the communication module;
the monitoring module is used for monitoring equipment of the automatic energy efficiency testing platform of the power electronic equipment, diagnosing faults and distinguishing the effectiveness of energy efficiency data;
and the database module is used for storing the scanning result and the energy efficiency test result.
Optionally, the rectifying means comprises a PWM rectifier;
the PWM rectifier is used for rectifying three-phase alternating current, generating direct current voltage on a direct current side capacitor and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module.
Optionally, the power electronic device to be tested includes a converter, an isolated DC/DC converter, and a two-port power electronic transformer.
Optionally, the programmable analog load adopts a three-phase bridge circuit of a full-control device;
and the energy absorbed by the programmable analog load is regulated and fed back to the direct current side of the alternating current-direct current power switch switching module through the SPWM.
The second aspect of the present application provides an automatic energy efficiency testing method for power electronic equipment, including:
connecting the power electronic equipment to be tested with the automatic energy efficiency test platform of the power electronic equipment in any one of the first aspect;
scanning equipment information of the power electronic equipment to be tested, and sending the equipment information to an energy efficiency comprehensive control system, so that the energy efficiency comprehensive control system checks the equipment information;
establishing an energy efficiency test loop with the power electronic equipment to be tested according to the equipment information;
carrying out energy efficiency test on the power electronic equipment to be tested according to a preset test simulation project of the power electronic equipment to be tested;
and storing the test result to the energy efficiency comprehensive control system.
Optionally, the test simulation item includes an operating life of the simulation device, a harmonic content rate of the simulation device during operation, a load rate of the simulation device, and a power switching tube driving regulation strategy of the simulation device.
Optionally, the saving the test result to the energy efficiency integrated control system includes:
and inputting the test result into a database of the energy efficiency comprehensive control system to generate an index label of the test result.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides an automatic test platform of power electronic equipment efficiency, includes: the energy efficiency comprehensive control system comprises an energy efficiency comprehensive control system, a power electronic equipment debugging and testing platform, a rectifying device, an alternating current/direct current power switch switching module, an isolation transformer module and a programmable analog load and scanning module; the rectifying device is used for getting electricity from a three-phase alternating current power grid and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module; the isolation transformer module is used for getting electricity from a three-phase alternating current power grid, outputting a three-phase adjustable alternating current power supply and providing an alternative alternating current power supply for the alternating current-direct current power switch switching module; the alternating current-direct current power switch switching module is used for getting electricity from a three-phase alternating current power grid or from the output side of the rectifying device through the isolation transformer module and providing an alternating current power supply or a direct current power supply for the power electronic equipment adjusting and testing platform; the programmable analog load is used for simulating an alternating current load or a direct current load of the power electronic equipment to be tested and receiving electric energy output by the power electronic equipment to be tested; the power electronic equipment to be tested is installed on the power electronic equipment debugging platform, the energy efficiency test condition of the power electronic equipment to be tested is simulated, and the energy efficiency test is carried out on the power electronic equipment to be tested; the scanning module is used for scanning and identifying the power electronic equipment to be detected and sending a scanning result to the energy efficiency comprehensive control system; the energy efficiency comprehensive control system is connected with the rectifying device, the isolation transformer module, the alternating current-direct current power switch switching module, the power electronic equipment debugging platform, the programmable analog load and the scanning module, and is used for constructing an energy efficiency test loop of the power electronic equipment to be tested according to the scanning result of the scanning module, monitoring and controlling the energy efficiency test process of the power electronic equipment to be tested, and generating an energy efficiency test result.
According to the automatic energy efficiency testing platform for the power electronic equipment, the direct-current power supply and the alternating-current power supply are respectively provided for the power electronic equipment to be tested from the rectifying device and the isolation transformer module through the alternating-current and direct-current power switch switching module, the power electronic equipment to be tested is scanned and identified through the scanning module, the scanning result is sent to the comprehensive energy efficiency control system, the comprehensive energy efficiency control system constructs a corresponding energy efficiency testing loop for the power electronic equipment to be tested, the power electronic equipment adjusting and testing platform is controlled to provide energy efficiency testing conditions for the power electronic equipment to be tested, the energy efficiency testing process of the power electronic equipment to be tested is monitored and controlled, the energy efficiency testing result of the power electronic equipment to be tested is generated, automatic energy efficiency testing can be realized only by replacing the power electronic equipment to be tested in the whole energy efficiency testing process, and the, the energy efficiency testing system has the advantages that resource waste is avoided, investment cost is saved, and the technical problems that an existing energy efficiency testing system of the power electronic equipment cannot adapt to energy efficiency tests of various power electronic equipment, investment cost is high, and repeated construction resource waste exists are solved.
Drawings
Fig. 1 is a schematic structural diagram of an automatic energy efficiency testing platform for power electronic devices provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an ac/dc power switch switching module provided in an embodiment of the present application;
fig. 3 is a schematic view of a topology of an isolation transformer module provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a programmable analog load provided in an embodiment of the present application;
fig. 5 is a schematic flowchart of an automatic energy efficiency testing method for a power electronic device provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For easy understanding, please refer to fig. 1, the present application provides an embodiment of an energy efficiency automatic test platform for power electronic devices, including: the energy efficiency comprehensive control system comprises an energy efficiency comprehensive control system, a power electronic equipment debugging and testing platform, a rectifying device, an alternating current/direct current power switch switching module, an isolation transformer module and a programmable analog load and scanning module;
the rectifying device is used for getting electricity from a three-phase alternating current power grid and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module;
the isolation transformer module is used for getting electricity from a three-phase alternating current power grid, outputting a three-phase adjustable alternating current power supply and providing an alternative alternating current power supply for the alternating current-direct current power switch switching module;
the alternating current-direct current power switch switching module is used for getting electricity from a three-phase alternating current power grid or from the output side of the rectifying device through the isolation transformer module and providing an alternating current power supply or a direct current power supply for the power electronic equipment adjusting and testing platform;
the programmable analog load is used for simulating an alternating current load or a direct current load of the power electronic equipment to be tested, receiving electric energy output by the power electronic equipment to be tested and feeding back the electric energy to the direct current side;
the power electronic equipment to be tested is installed on the power electronic equipment debugging platform, the energy efficiency test condition of the power electronic equipment to be tested is simulated, and the energy efficiency test is carried out on the power electronic equipment to be tested;
the scanning module is used for scanning and identifying the power electronic equipment to be detected and sending a scanning result to the energy efficiency comprehensive control system;
the energy efficiency comprehensive control system is connected with the rectifying device, the isolation transformer module, the alternating current-direct current power switch switching module, the power electronic equipment debugging platform, the programmable analog load and the scanning module, and is used for constructing an energy efficiency test loop of the power electronic equipment to be tested according to the scanning result of the scanning module, monitoring and controlling the energy efficiency test process of the power electronic equipment to be tested, and generating an energy efficiency test result.
Note that, in fig. 1, a solid line with a unidirectional or bidirectional arrow represents a circuit connection line, and a double-layer connection line represents an RS485 conversion circuit or a communication line such as a USB. In the embodiment of the application, the scanning module scans information of the power electronic device to be tested and sends the information to the energy efficiency comprehensive control system, the energy efficiency comprehensive control system controls the rectifying device, the isolation transformer module, the alternating current/direct current switching power supply switching module, the programmable analog load and the power electronic device debugging platform according to the information of the power electronic device to be tested, an energy efficiency test loop of the power electronic device to be tested is established, the power electronic device debugging platform is controlled to simulate energy efficiency test conditions of the power electronic device to be tested, energy efficiency test is conducted on the power electronic device to be tested, and an energy efficiency test result of the power electronic device to be tested is generated. The rectifying device is used for obtaining electricity from a three-phase alternating current power grid, rectifying alternating current into direct current, generating direct current voltage on a direct current side capacitor and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module. The isolation transformer module gets electricity from a three-phase alternating current power grid, outputs three-phase adjustable alternating current and provides an alternative alternating current power supply for the alternating current and direct current power switch switching module. The alternating current-direct current power switch switching module gets electricity from the output end of the rectifying device and the output end of the isolation transformer module, and provides a required direct current power supply and an alternating current power supply for the power electronic equipment to be tested installed on the power electronic equipment debugging platform, as shown in fig. 2, the alternating current-direct current power switch switching module controls the power on-off of the input side of the power electronic equipment to be tested and the rectifying device and the isolation transformer module through the switching of two contacts (CR10 and CR 11). The energy efficiency expression of the power electronic equipment to be tested is as follows:
wherein p is0To output power, piIs the input power.
According to the automatic energy efficiency testing platform for the power electronic equipment, the direct-current power supply and the alternating-current power supply are respectively provided for the power electronic equipment to be tested from the rectifying device and the isolation transformer module through the alternating-current and direct-current power switch switching module, the power electronic equipment to be tested is scanned and identified through the scanning module, the scanning result is sent to the comprehensive energy efficiency control system, the comprehensive energy efficiency control system constructs a corresponding energy efficiency testing loop for the power electronic equipment to be tested, the power electronic equipment debugging and testing platform is controlled to provide energy efficiency testing conditions for the power electronic equipment to be tested, the energy efficiency testing process of the power electronic equipment to be tested is monitored and controlled, the energy efficiency testing result of the power electronic equipment to be tested is generated, automatic energy efficiency testing can be realized only by replacing the power electronic equipment to be tested in the whole energy efficiency testing process, and the, the energy efficiency testing system has the advantages that resource waste is avoided, investment cost is saved, and the technical problems that an existing energy efficiency testing system of the power electronic equipment cannot adapt to energy efficiency tests of various power electronic equipment, investment cost is high, and repeated construction resource waste exists are solved.
As a further improvement of the embodiment of the present application, in the automatic energy efficiency testing platform for the power electronic device in the embodiment of the present application, the power electronic device debugging platform includes a device-to-be-tested installation module, a modulation strategy module, and a data acquisition card module;
the device installation module to be tested is used for installing the power electronic device to be tested and connecting the power electronic device to be tested with the energy efficiency test circuit;
the modulation strategy module is connected with the equipment installation module to be tested and used for driving a power switch tube of the power electronic equipment to be tested;
and the data acquisition card module is used for acquiring the input current signal, the output current signal, the input voltage signal, the output voltage signal and the data of the energy efficiency test condition of the power electronic equipment to be tested, and sending the input current signal, the output current signal, the input voltage signal, the output voltage signal and the data of the energy efficiency test condition to the energy efficiency comprehensive control system.
It should be noted that the input side of the device installation module to be tested is connected to the ac/dc power switch switching module, the output side is connected to the input terminal that can become the analog load, the device installation module to be tested of the power electronic device debugging platform is used for installing the power electronic device to be tested, and the device installation module to be tested is electrically connected to the power electronic device to be tested. The modulation strategy module provides energy efficiency test conditions, such as external environments including temperature, humidity and the like, required by the power electronic equipment to be tested when the power electronic equipment to be tested operates, so that the validity and the accuracy of energy efficiency test data are ensured. The data acquisition card module can be composed of a plurality of high-precision data acquisition cards, voltage signals, current signals, temperature and humidity data and the like at two ends of the power electronic equipment to be detected are accurately obtained through the conditioning circuit, the acquired data are sent to the energy efficiency comprehensive control system in real time to be processed, and compared with data acquisition circuits such as a power meter, a phase-locked loop and a temperature sensor, the data acquisition card module in the embodiment of the application has the advantages of higher measurement precision and higher operation and transmission speed.
As a further improvement of the embodiment of the present application, in the automatic energy efficiency testing platform for power electronic devices in the embodiment of the present application, a primary side of an isolation transformer module is connected in parallel with a branch consisting of a contact and a current-limiting resistor, a secondary side of the isolation transformer module provides an adjustable three-phase alternating current, and a transformer winding adopts a star-delta connection for isolating impact and interference generated when the power electronic device to be tested is started or stopped.
It should be noted that, the topological structure of the isolation transformer module is shown in fig. 3, and includes a power switch S1, a main contactor CR4, a buffer device, and an isolation transformer, the three-phase power of the power grid is connected to the main contactor CR4 through the power switch S1, and two ends of the main contactor CR4 are connected in parallel to a buffer branch formed by a contactor CR3 and a current-limiting resistor. When the isolation transformer is connected to a power grid, large current impact can occur, and the buffer branch can effectively place the current impact. The start and stop of the power electronic equipment to be tested can generate large impact in the circuit, and the isolation transformer adopts a star-triangle structure, so that the interference of the power electronic equipment to be tested on a power grid in the energy efficiency test process can be effectively isolated. The secondary side of the isolation transformer is provided with a plurality of contactors to control the output of the secondary side voltage so as to meet the measurement requirements of different voltage levels, and as shown in fig. 3, in the embodiment of the present application, 5 taps are adopted and are respectively connected with contactors CR5, CR6, CR7, CR8 and CR 9.
As a further improvement of the embodiment of the application, in the automatic energy efficiency testing platform for the power electronic equipment in the embodiment of the application, the energy efficiency comprehensive control system comprises a control module, a communication module, a monitoring module and a database module;
the control module is connected with the communication module and used for transmitting data and instructions through the communication module;
the monitoring module is used for monitoring equipment of the power electronic equipment energy efficiency automatic test platform, diagnosing faults and distinguishing energy efficiency data validity;
and the database module is used for storing the scanning result and the energy efficiency test result.
It should be noted that, as shown in fig. 1, the energy efficiency comprehensive control system in the embodiment of the present application includes a control module, a communication module, a monitoring module and a database module, where the control module is connected to the communication module to complete data transmission and instruction transmission, the monitoring module is configured to monitor a device operating state of a platform, diagnose a fault, and identify validity of energy efficiency data, and the database module is configured to store a scanning result and an energy efficiency test result of a power electronic device to be tested in real time, where the stored scanning result and energy efficiency test result may be flexibly retrieved and applied to a power distribution network for online operation, so as to improve uniformity and universality of the test platform.
As a further improvement to the embodiment of the present application, in the automatic energy efficiency testing platform for power electronic equipment in the embodiment of the present application, the rectifying device includes a PWM rectifier;
the PWM rectifier is used for rectifying the three-phase alternating current, generating direct-current voltage on a direct-current side capacitor and providing an alternative direct-current power supply for the alternating-current and direct-current power supply switch switching module.
As a further improvement of the embodiment of the present application, in the automatic energy efficiency testing platform for power electronic devices in the embodiment of the present application, the power electronic device to be tested includes a converter, an isolated DC/DC converter, and a two-port power electronic transformer.
It should be noted that, as shown in fig. 1, when the power electronic device to be tested is a current transformer, the process of constructing the energy efficiency test loop includes: and the control contact CR1 is opened, the contact CR2 is closed, the programmable analog load is started, and the alternating current and direct current power supply switch switching module is controlled to obtain direct current from the direct current device so as to provide direct current power supply for the converter. When the power electronic equipment to be tested is an isolated DC/DC converter, the construction process of the energy efficiency test loop comprises the following steps: and controlling the contact CR1 to be closed and the contact CR2 to be closed, starting the programmable analog load, controlling the alternating current and direct current power switch switching module to be connected with the isolation transformer module, and taking power from the isolation transformer module to provide an alternating current power supply for the isolation type DC/DC converter. When the power electronic equipment to be tested is a two-port power electronic transformer, the construction process of the energy efficiency test loop comprises the following steps: and the control contact CR1 is disconnected, the contact CR2 is disconnected, the programmable analog load is started, the alternating current/direct current power supply switch switching module is controlled to be connected with the rectifying device, the rectifying device is powered, and a direct current power supply is provided for the two-port power electronic transformer.
As a further improvement of the embodiment of the present application, in the automatic energy efficiency testing platform for power electronic equipment in the embodiment of the present application, the programmable analog load is a three-phase bridge circuit of a full-control device;
the energy absorbed by the programmable analog load is regulated and fed back to the direct current side of the alternating current-direct current power switch switching module through the SPWM.
It should be noted that, as shown in fig. 4, the programmable analog load adopts a three-phase device bridge circuit of a fully-controlled power electronic device, adopts an SPWM strategy to simulate the load size within the full load rate range of the device, and feeds back the energy absorbed from the output side of the power electronic device to be tested to the power grid to realize energy circulation. The energy efficiency comprehensive control system transmits different modulation pulse signals to the power electronic equipment to be tested through the control modulation strategy module, so that the conversion control of the control strategy of the power electronic equipment to be tested is realized, and the modulation strategy of the power tube comprises the SPWM, the quasi-optimal SVPWM, the SVPWM with the minimum switching loss and the like.
For convenience of understanding, please refer to fig. 5, an embodiment of a method for automatically testing energy efficiency of a power electronic device is provided in the present application, including:
step 101, connecting the power electronic equipment to be tested with any one of the power electronic equipment energy efficiency automatic test platforms in the power electronic equipment energy efficiency automatic test platform embodiments.
And 102, scanning equipment information of the power electronic equipment to be tested, and sending the equipment information to the energy efficiency comprehensive control system, so that the energy efficiency comprehensive control system checks the equipment information.
And 103, establishing an energy efficiency test loop of the power electronic equipment to be tested according to the equipment information.
And 104, carrying out energy efficiency test on the power electronic equipment to be tested according to a preset test simulation project of the power electronic equipment to be tested.
And 105, storing the test result to the energy efficiency comprehensive control system.
It should be noted that the power electronic device to be tested in the embodiment of the present application may be a converter, an isolated DC/DC converter, or a two-port power electronic transformer.
And installing the power electronic equipment to be tested on the power electronic equipment debugging platform, and connecting the power electronic equipment to be tested with corresponding lines according to the number of inlet and outlet lines of the input side and the output side of the power electronic equipment to be tested and related wiring driven by a power tube switch of the power electronic equipment to be tested.
The scanning module scans the power electronic equipment to be detected, scanned equipment information is fed back to the energy efficiency comprehensive control system, the energy efficiency comprehensive control system checks the equipment information data, and the next step is carried out if the checking is successful. The checked content may include whether the device tag model is consistent with the actual device model in the scanned device information, whether the device factory parameters are qualified (including the device factory life and the related protection parameters of the device), and the working parameters of the normal operation of the device (including the device operating voltage, the load factor range, the allowable maximum harmonic content rate, and the like).
The energy efficiency comprehensive control system constructs a corresponding energy efficiency test loop according to the equipment information, and specifically, if the power electronic equipment to be tested is a converter, the contact CR1 in the graph 1 is controlled to be disconnected, the contact CR2 is controlled to be closed, the programmable analog load is started, and the alternating current/direct current power supply switch switching module is controlled to be connected with the rectifying device to perform direct current power supply on the converter. If the power electronic equipment to be tested is a two-port power electronic transformer, the contact CR1 and the contact CR2 in the graph 1 are controlled to be disconnected, the programmable analog load is started, and the alternating current/direct current power supply switch switching module is controlled to be connected with the rectifying device to perform direct current power supply on the two-port power electronic transformer. If the power electronic equipment to be tested is the isolated DC/DC converter, the contact CR1 in the control chart 1 is closed, the contact CR2 is closed, the programmable analog load is started, and the alternating current/direct current power supply switch module is controlled to be connected with the isolation transformer module to carry out alternating current power supply on the isolated DC/DC converter.
And starting the data acquisition card module, and carrying out energy efficiency test on the power electronic equipment to be tested according to a preset test simulation item of the power electronic equipment to be tested when the energy efficiency test condition of the power electronic equipment to be tested is met. The test items may include:
the service life of the equipment is as follows: the efficiency of the same type of equipment under the same operation condition is obtained along with the change curve of the operation age, the equipment operation age affects the aging degree of the equipment, and then the equipment energy efficiency can be changed, so that the equipment operation age is used as a simulation test parameter of the energy efficiency test.
Harmonic content when equipment operates: and testing the change condition of the equipment efficiency along with the equipment harmonic content, and taking the harmonic content as a simulation test parameter of the energy efficiency test when the equipment runs.
The equipment load rate: namely, the change condition of the equipment efficiency along with the load rate, and in order to ensure the effectiveness and the accuracy of the acquired data in the test process, the energy efficiency test is performed once by considering that the load rate of the power electronic equipment to be tested is gradually increased by 0.2 to 0.5 percent in the load range.
The device power switch tube driving regulation strategy is as follows: i.e. the variation of the efficiency of the device with the power tube driving scheme.
The testing processes of the testing parameters are mutually independent, only one parameter is allowed to change every time, and the influence of other factors is shielded, so that the detected energy efficiency curve of the equipment is ensured to be only acted by corresponding influence factors.
And storing the test result to the energy efficiency comprehensive control system. An index label of each test result can be established and recorded into the database module, and the index label can contain information such as operation age, equipment type, load rate, control strategy and harmonic content rate, so that the change condition of the equipment energy efficiency along with the influence factors is fully embodied.
The embodiment of the application adopts a modularized design idea, meets the energy efficiency test requirements of different types of power electronic equipment under different operation conditions, constructs an energy efficiency database of the power electronic equipment according to the test result, can quickly and accurately obtain the energy efficiency of the equipment by retrieving the index tag, and overcomes the defects of difficult energy efficiency measurement, low precision, repeated measurement and the like when the equipment operates on line; the alternating current power supply and the direct current power supply in the test platform are all powered on the alternating current power distribution network, the actual working environment of the power electronic equipment can be simulated really, the energy efficiency change trend of the power electronic equipment is tested on the similar equipment in terms of four influences, namely the operation age, the harmonic content, the load rate and the control strategy, only one parameter is allowed to change every time, and the influences of other factors are shielded, so that the authenticity and the accuracy of the obtained energy efficiency curve of the equipment are ensured.
In the several embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer system (which may be a personal computer, a server, or a network system) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. The utility model provides a power electronic equipment efficiency automatic test platform which characterized in that includes: the energy efficiency comprehensive control system comprises an energy efficiency comprehensive control system, a power electronic equipment debugging and testing platform, a rectifying device, an alternating current/direct current power switch switching module, an isolation transformer module and a programmable analog load and scanning module;
the rectifying device is used for getting electricity from a three-phase alternating current power grid and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module;
the isolation transformer module is used for getting electricity from the three-phase alternating current power grid, outputting a three-phase adjustable alternating current power supply and providing an alternative alternating current power supply for the alternating current and direct current power supply switch switching module;
the alternating current/direct current power switch switching module is used for getting electricity from the three-phase alternating current power grid or from the output side of the rectifying device through the isolation transformer module and providing an alternating current power supply or a direct current power supply for the power electronic equipment debugging platform;
the programmable analog load is used for simulating an alternating current load or a direct current load of the power electronic equipment to be tested, receiving electric energy output by the power electronic equipment to be tested and feeding back the electric energy to the direct current side;
the power electronic equipment to be tested is installed on the power electronic equipment debugging platform, the energy efficiency test condition of the power electronic equipment to be tested is simulated, and the energy efficiency test is carried out on the power electronic equipment to be tested;
the scanning module is used for scanning and identifying the power electronic equipment to be detected and sending a scanning result to the energy efficiency comprehensive control system;
the energy efficiency comprehensive control system is connected with the rectifying device, the isolation transformer module, the alternating current/direct current power switch switching module, the power electronic equipment debugging platform, the programmable analog load and the scanning module, and is used for constructing an energy efficiency test loop of the power electronic equipment to be tested according to a scanning result of the scanning module, monitoring and controlling an energy efficiency test process of the power electronic equipment to be tested, and generating an energy efficiency test result.
2. The power electronic equipment energy efficiency automatic test platform according to claim 1, wherein the power electronic equipment debugging platform comprises a to-be-tested equipment installation module, a modulation strategy module and a data acquisition card module;
the device installation module to be tested is used for installing the power electronic device to be tested and connecting the power electronic device to be tested with an energy efficiency test circuit;
the modulation strategy module is connected with the equipment installation module to be tested and used for driving a power switch tube of the power electronic equipment to be tested;
the data acquisition card module is used for acquiring an input current signal, an output current signal, an input voltage signal, an output voltage signal and the data of the energy efficiency test condition of the power electronic equipment to be tested, and sending the input current signal, the output current signal, the input voltage signal, the output voltage signal and the data of the energy efficiency test condition to the energy efficiency comprehensive control system.
3. The automatic energy efficiency testing platform for the power electronic equipment according to claim 1, wherein a primary side of an isolation transformer of the isolation transformer module is connected in parallel with a branch consisting of a contact and a current-limiting resistor, a secondary side of the isolation transformer module provides adjustable three-phase alternating current, and a transformer winding adopts star-delta connection for isolating impact and interference generated when the power electronic equipment to be tested is started or stopped.
4. The power electronic equipment energy efficiency automatic test platform according to claim 1, wherein the energy efficiency comprehensive control system comprises a control module, a communication module, a monitoring module and a database module;
the control module is connected with the communication module and used for carrying out data transmission and instruction sending through the communication module;
the monitoring module is used for monitoring equipment of the automatic energy efficiency testing platform of the power electronic equipment, diagnosing faults and distinguishing the effectiveness of energy efficiency data;
and the database module is used for storing the scanning result and the energy efficiency test result.
5. The power electronic equipment energy efficiency automatic test platform according to claim 1, characterized in that the rectifying device comprises a PWM rectifier;
the PWM rectifier is used for rectifying three-phase alternating current, generating direct current voltage on a direct current side capacitor and providing an alternative direct current power supply for the alternating current and direct current power supply switch switching module.
6. The automatic energy efficiency testing platform for the power electronic equipment according to claim 1, wherein the power electronic equipment to be tested comprises a current transformer, an isolated DC/DC converter and a two-port power electronic transformer.
7. The automatic energy efficiency testing platform for the power electronic equipment according to claim 2, wherein the programmable analog load adopts a three-phase bridge circuit of a fully-controlled device;
and the energy absorbed by the programmable analog load is regulated and fed back to the direct current side of the alternating current-direct current power switch switching module through the SPWM.
8. An energy efficiency automatic test method for power electronic equipment is characterized by comprising the following steps:
connecting the power electronic equipment to be tested with the power electronic equipment energy efficiency automatic test platform of any one of claims 1-7;
scanning equipment information of the power electronic equipment to be tested, and sending the equipment information to an energy efficiency comprehensive control system, so that the energy efficiency comprehensive control system checks the equipment information;
establishing an energy efficiency test loop with the power electronic equipment to be tested according to the equipment information;
carrying out energy efficiency test on the power electronic equipment to be tested according to a preset test simulation project of the power electronic equipment to be tested;
and storing the test result to the energy efficiency comprehensive control system.
9. The method according to claim 8, wherein the test simulation items comprise simulation equipment operation age, simulation equipment operation harmonic content, simulation equipment load rate and simulation equipment power switch tube driving regulation strategy.
10. The method for automatically testing the energy efficiency of the power electronic equipment according to claim 9, wherein the step of saving the test result to the energy efficiency integrated control system comprises:
and inputting the test result into a database of the energy efficiency comprehensive control system to generate an index label of the test result.
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Application publication date: 20200728 |