CN111898240B - Power switch equipment development test system - Google Patents
Power switch equipment development test system Download PDFInfo
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- CN111898240B CN111898240B CN202010544285.0A CN202010544285A CN111898240B CN 111898240 B CN111898240 B CN 111898240B CN 202010544285 A CN202010544285 A CN 202010544285A CN 111898240 B CN111898240 B CN 111898240B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses a power switch equipment development test system, which comprises a main loop module, a controller module, an instruction module, a data processing module and a display module, wherein a full-software online simulation mode is adopted, hardware simulation and a control algorithm are combined, the main loop characteristic of the power switch equipment can be tested, the control performance of the control algorithm can be verified, and the power switch equipment development test system can be used as an auxiliary test equipment for the function test of an upper computer. The invention can be widely applied to hardware principle test and control software principle test of various power switch devices, and can also be used as an auxiliary test device for the function test of an upper computer, thereby improving the safety and the economical efficiency of the power switch device test, reducing the time spent in the whole process of development and test, and obviously improving the development and test efficiency of the power switch device.
Description
Technical Field
The invention belongs to the field of computer simulation tests, and particularly relates to a power switch equipment development test system.
Background
When the power switch equipment is used for debugging control software, an experimental site, experimental equipment, instruments and meters, a power supply, various loads and the like need to be prepared, and the preparation work is complex; because of the strong electricity involved, and the possibility of explosion of the equipment caused by the defects of control software, the danger is high; when debugging, need consume place, personnel and electric power etc. the cost is huge. Meanwhile, if the power switch equipment does not meet the design performance index, hardware needs to be changed, and rework is very troublesome.
Disclosure of Invention
The purpose of the application is to overcome the difficulty of lacking of system resources, combine hardware simulation and a control algorithm, provide an implementation scheme of a power switch device development test system, test the characteristics of a main loop of the power switch device, verify the control performance of the control algorithm, and serve as an accompanying test device for the function test of an upper computer.
The technical scheme adopted by the invention for solving the technical problems is as follows: a power switch equipment development test system comprises a data processing module, and a main loop module, a controller module and an instruction module which are respectively connected with the data processing module; the data processing module consists of a control variable unit, a controller state variable unit, a main loop state variable unit and an event sequencer, wherein the main loop module adopts a Buck/Boost Buck-Boost hybrid circuit to establish the following mathematical model
Wherein:L 1 andI L1 the inductance value and the operating current of the first inductor L1,L 2 andI L2 the inductance value and the operating current of the second inductor L2,C 1 andU C1 respectively the capacitance value and the voltage across the capacitor C1,R cell andV cell respectively the internal resistance value and the electromotive force of the load cell,R IGBT1 、I IGBT1 andU IGBT1 respectively the equivalent resistance value, the working current and the voltage across the first switch tube S1,R IGBT2 andU IGBT2 respectively the equivalent resistance value and the two-terminal voltage of the second switch tube S2,V DC is a voltage of the direct-current bus,tis time;
solving the differential equation system through the following calculation formula to simulate the characteristics of a real main loop:
wherein: z L1 AndI L1 the reactance value and the operating current, Z, of the first inductor L1, respectively L2 AndI L2 the reactance value and the operating current, Z, of the second inductor L2, respectively C1 AndU C1 respectively the reactance value and the voltage across the capacitor C1,Z R_CELL andV cell respectively the internal resistance reactance value and the electromotive force of the load battery,Z R_IGBT1 andI IGBT1 respectively the equivalent reactance value and the operating current of the first switching tube S1,Z R_IGBT2 andU IGBT2 respectively the equivalent reactance value and the voltage across the second switch tube S2,V DC is a voltage of the direct-current bus,tfor time, the superscript + in the formula represents the value of the variable at the current moment, and the superscript-represents the value of the variable at the previous moment.
The Buck/Boost voltage boosting hybrid circuit of the power switching equipment development test system consists of a capacitor C1, a first inductor L1, a second inductor L2, a first switching tube S1 and a second switching tube S2, wherein the first switching tube S1 and the second switching tube S2 are IGBTs, one end of the first inductor L1 is respectively connected with the drain electrode of the first switching tube S1 and the source electrode of the second switching tube S2, the other end of the first inductor L1 is respectively connected with the positive end of the capacitor C1 and one end of the second inductor L2, the other end of the second inductor L2 is connected with the positive electrode of the low-voltage side of the Buck/Boost voltage boosting hybrid circuit, the negative end of the capacitor C1 is respectively connected with the negative electrode of the Buck/Boost Buck-Boost hybrid circuit at the low-voltage side, the source electrode of the first switch tube S1 of the second switch tube S2 and the drain electrode of the second switch tube S2 are respectively connected with the positive electrode and the negative electrode of the Buck/Boost Buck-Boost hybrid circuit at the high-voltage side.
The data processing module of the power switch equipment development testing system takes an event sequencer as a time main shaft, sequences data sent by a main loop module, a controller module and an instruction module, processes the data according to the priority of the main loop module, the controller module and the instruction module, selects and sends displayed system variables to a display module connected with a controller state variable unit for display, and sends externally required system variables to an external communication port connected with the main loop state variable unit.
The power switch equipment development test system is characterized in that a controller module of the power switch equipment development test system is composed of a control software unit and a bottom layer software driving unit.
The command module of the power switch equipment development testing system comprises a command parser and a command generator, wherein the command parser parses a command into a control variable of a controller module, and receives an external command through an external communication port, so that the development testing system is used as an auxiliary testing device for the function test of an upper computer and automatically runs through the command generator.
The invention has the beneficial effects that:
the experimental site, experimental equipment, instruments and meters, a power supply, various loads and the like do not need to be prepared, and the preparation work is simple; strong electricity is not involved, equipment explosion caused by the defects of control software is avoided, and the safety is high; the consumption of fields, personnel, electric power and the like is not needed, and the economy is good; the design of main loop parameters of the power switch equipment can be confirmed in an auxiliary mode, the correctness and the control performance of control software can be verified, the function of an upper computer can be tested in an auxiliary mode, and the application range is wide; the method has the advantages of convenient use, quick and reliable test, capability of obviously reducing the time spent in the whole development and test process and improvement of the development and test efficiency of the power switch equipment.
All in all, the system is simple and reasonable in design, high in safety, good in economy, convenient and fast, capable of being widely applied to hardware principle testing and control software principle testing of various power switch devices, and also capable of being used as test accompanying equipment for upper computer function testing, safety and economical efficiency of power switch device testing are improved, time spent in the whole development and testing process is reduced, and development and testing efficiency of the power switch device can be remarkably improved.
Drawings
FIG. 1 is a system framework of the present invention;
FIG. 2 is a Buck/Boost Buck-Boost hybrid circuit of the present invention;
FIG. 3 is a block diagram of a controller module according to the present invention;
FIG. 4 is a block diagram of an instruction module according to the present invention;
FIG. 5 is a block diagram of a data processing module according to the present invention;
FIG. 6 is a simulation test result of the present invention;
FIG. 7 is an observation of the control software development environment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the power switching device development test system disclosed by the present invention includes a data processing module (program main frame), and a main loop module, a controller module and an instruction module respectively connected to the data processing module; the data processing module consists of a control variable unit, a controller state variable unit, a main loop state variable unit and an event sequencer, wherein the main loop module adopts a Buck/Boost Buck-Boost hybrid circuit to establish the following mathematical model
Solving the differential equation system through the following calculation formula to simulate the characteristics of a real main loop:
a Buck/Boost Buck-Boost hybrid circuit (shown in figure 2) is adopted in a main loop module of the test system, a mathematical model (shown in a formula I) is established, a differential equation set is solved through a calculation formula (shown in a formula II), and the characteristics of a real main loop are simulated.
As shown in fig. 2, the Buck/Boost hybrid circuit is composed of a capacitor C1, a first inductor L1, a second inductor L2, a first switch tube S1 and a second switch tube S2, the first switch tube S1 and the second switch tube S2 are IGBTs, one end of the first inductor L1 is connected to the drain of the first switch tube S1 and the source of the second switch tube S2, the other end of the first inductor L1 is connected to the positive terminal of the capacitor C1 and one end of the second inductor L2, the other end of the second inductor L2 is connected to the positive terminal of the low-voltage side of the Buck/Boost hybrid circuit, and the negative terminal of the capacitor C1 is connected to the negative terminal of the low-voltage side of the Buck/Boost hybrid circuit and the source of the first switch tube S1 and the drain of the second switch tube S2 of the second switch tube S2 are connected to the positive terminal of the high-voltage side of the Buck/Boost hybrid circuit and the negative terminal of the Buck circuit.
The module framework of the controller module is shown in fig. 3 and is composed of a control software unit and a bottom layer software driving unit. The controller module is formed by packaging the actually used control software together with a bottom layer software driver, and can truly reflect the defects and the performance of the actually used control software.
A module framework of the instruction module is shown in fig. 4 and comprises two functional blocks, namely an instruction resolver and an instruction generator, wherein the instruction resolver resolves an instruction into a control variable of the controller module, the instruction resolver is provided with two inlets, one inlet is an external communication port and receives an external instruction, so that the power switch equipment development and test system can be used as an auxiliary test device for the functional test of the upper computer; the other inlet is an instruction generator, so that the power switch equipment development and test system can automatically run without external control.
The data processing module takes the event sequencer as a time main shaft and sequences data (events) sent by the main loop module, the controller module and the instruction module. All events are inserted on the time main axis (event queue) according to the occurrence time sequence. And if the events among different modules have time sequence competition, processing according to the priority of the main loop module event > the controller module event > the instruction module event. The system executes events on the time main shaft in sequence and updates system variables in time. The system variables can be mutually called after data processing. And selecting the displayed system variable to be sent to a display module for displaying, and sending the system variable required by the outside to an external communication port. The module framework of the data processing module is shown in fig. 5.
In order to compare the simulation test result provided by the invention with the real situation, fig. 6 shows the relationship between the control variable and the output current under the process conditions of the software to be tested, such as operation standing → 25% rated current for charging → 25% rated current for discharging → 50% rated current for charging, under the simulation test condition of the development test system. In the figure, the control variable of the charging current is 2 sawtooth waves when the charging current is reduced under the process of charging 25% of rated current and discharging 25% of rated current.
Fig. 7 shows the relationship between the control variable and the output current in the constant current charging stage in the conversion process of charging 25% rated current → discharging 25% rated current observed in the development environment of the control software when the software to be tested actually runs the above process under the test condition of the actual power switching device, and it is obvious that the simulation test result provided herein is consistent with the observed waveform in both the steady-state amplitude and the transient waveform. Through analysis of software to be tested, the transient waveform of the simulation test result is more accurate.
The invention adopts a full software on-line simulation mode, combines hardware simulation with a control algorithm, can test the main loop characteristic of the power switch equipment, can also verify the control performance of the control algorithm, and can be used as an auxiliary test equipment for the function test of an upper computer.
The invention has simple and reasonable design, does not relate to strong electricity, can not explode due to out-of-control algorithm, can not generate extra cost, does not need test fields, test accompanying equipment and equipment wiring, has high safety and good economical efficiency, is convenient and quick, can be widely applied to hardware principle test and control software principle test of various power switch equipment, can also be used as test accompanying equipment for upper computer function test, improves the safety and the economical efficiency of the power switch equipment test, reduces the time spent in the whole development and test process, and can obviously improve the development and test efficiency of the power switch equipment.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. A power switch equipment development test system is characterized in that:
the system comprises a data processing module, and a main loop module, a controller module and an instruction module which are respectively connected with the data processing module;
the data processing module consists of a control variable unit, a controller state variable unit, a main loop state variable unit and an event sequencer, wherein the main loop module adopts a Buck/Boost Buck-Boost hybrid circuit to establish the following mathematical model
Wherein:L 1 andI L1 the inductance value and the operating current of the first inductor L1,L 2 andI L2 the inductance value and the operating current of the second inductor L2,C 1 andU C1 respectively the capacitance value and the voltage across the capacitor C1,R cell andV cell respectively the internal resistance value and the electromotive force of the load cell,R IGBT1 、I IGBT1 andU IGBT1 respectively the equivalent resistance value, the working current and the voltage across the first switch tube S1,R IGBT2 andU IGBT2 respectively the equivalent resistance value and the two-terminal voltage of the second switch tube S2,V DC is a voltage of the direct-current bus,tis time;
solving the differential equation system through the following calculation formula to simulate the characteristics of a real main loop:
wherein: z L1 AndI L1 the reactance value and the operating current, Z, of the first inductor L1, respectively L2 AndI L2 the reactance value and the operating current, Z, of the second inductor L2, respectively C1 AndU C1 respectively the reactance value and the voltage across the capacitor C1,Z R_CELL andV cell respectively the internal resistance reactance value and the electromotive force of the load battery,Z R_IGBT1 andI IGBT1 respectively the equivalent reactance value and the operating current of the first switching tube S1,Z R_IGBT2 andU IGBT2 respectively the equivalent reactance value and the voltage across the second switch tube S2,V DC is a voltage of the direct-current bus,tfor time, the superscript + in the formula represents the value of the variable at the current moment, and the superscript-represents the value of the variable at the previous moment;
the Buck/Boost Buck-Boost hybrid circuit is composed of a capacitor C1, a first inductor L1, a second inductor L2, a first switch tube S1 and a second switch tube S2, the first switch tube S1 and the second switch tube S2 are IGBTs, one end of the first inductor L1 is connected with the drain electrode of the first switch tube S1 and the source electrode of the second switch tube S2 respectively, the other end of the first inductor L1 is connected with the positive end of the capacitor C1 and one end of the second inductor L2 respectively, the other end of the second inductor L2 is connected with the positive electrode of the low-voltage side of the circuit, the negative end of the capacitor C1 is connected with the negative electrode of the low-voltage side of the circuit and the source electrode of the first switch tube S1 of the second switch tube S2 and the drain electrode of the second switch tube S2 are connected with the positive electrode and the negative electrode of the high-voltage side of the circuit respectively.
2. The power switch equipment development test system according to claim 1, wherein the data processing module uses an event sequencer as a time main axis to sequence data sent by the main loop module, the controller module and the instruction module, processes the data according to the priority of the main loop module > the controller module > the instruction module, selects and sends displayed system variables to the display module connected with the controller state variable unit for display, and sends externally required system variables to the external communication port connected with the main loop state variable unit.
3. The power switching device development test system of claim 1, wherein the controller module is comprised of a control software unit and an underlying software driver unit.
4. The power switch device development test system of claim 1, wherein the command module comprises a command parser and a command generator, the command parser parses a command into a control variable of the controller module, and receives an external command through the external communication port, so that the development test system can automatically operate as a test assistant device for testing functions of the upper computer through the command generator.
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