CN109194105B - Converter control method, device and system and converter - Google Patents
Converter control method, device and system and converter Download PDFInfo
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- CN109194105B CN109194105B CN201810974801.6A CN201810974801A CN109194105B CN 109194105 B CN109194105 B CN 109194105B CN 201810974801 A CN201810974801 A CN 201810974801A CN 109194105 B CN109194105 B CN 109194105B
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 description 10
- 238000010977 unit operation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
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Abstract
The invention discloses a converter control method, a device and a system and a converter, wherein the method comprises the following steps: detecting working parameters of components in the converter; judging whether the working parameters meet preset requirements or not; and when the working parameters meet the preset requirements, adjusting the current of the converter. The invention solves the problems that components in the converter in the prior art are easy to heat when the power is larger and damage the converter, and improves the operation safety of the converter.
Description
Technical Field
The invention relates to the technical field of converters, in particular to a converter control method, a converter control device, a converter control system and a converter.
Background
On a high-power electric power converter, the rated working current reaches 600A, and a copper bar is generally adopted as a conductor to transmit large current. When the copper bar is connected in a converging way or turned, bolts are generally adopted for connection. Because the thickness and the size of the copper bar connecting terminal device are larger, the hardness is higher, and the risk of poor connection contact and increased contact resistance exists; at the same time, there is also a risk that vibrations cause the connection conditions to deteriorate and the contact resistance to increase during transport or operation of the unit. Due to the fact that the current carrying capacity is large, the heating value can be greatly increased due to the tiny increase of the contact resistance, efficiency loss is caused, related devices can be burnt out under severe conditions, and large loss is caused.
Meanwhile, a large amount of heat generated by the high-power electronic switching device during working needs to be dissipated, and if the temperature is too high and the heat is not dissipated timely, the module is burnt out. In the past, protection and control are generally performed by monitoring the temperature inside a module, and if the temperature rises to a set value, power output is limited to meet the temperature requirement. Although the generation of temperature has a direct relationship with the power loss of the electronic switching device, protection by temperature detection has a delay hysteresis compared to protection based on power loss.
Aiming at the problems that components in a converter in the related technology are easy to heat when the power is large and damage the converter, an effective solution is not provided at present.
Disclosure of Invention
The invention provides a converter control method, a device and a system and a converter, which at least solve the problems that components in the converter in the prior art are easy to heat when the power is high and damage the converter.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a converter control method, including: detecting working parameters of components in the converter; judging whether the working parameters meet preset requirements or not; and when the working parameters meet the preset requirements, adjusting the current of the converter.
Further, the component includes: busbar and electronic switching device.
Further, detecting the operating parameters of components in the converter comprises: detecting the contact resistance and power loss of the incoming line segment busbar; detecting the contact resistance and power loss of the bus bar of the wire outlet section; and, detecting a power loss of the electronic switching device; the bus bar comprises a line incoming section bus bar and a line outgoing section bus bar.
Further, detecting the contact resistance and the power loss of the incoming line segment busbar comprises: acquiring input current I1 of a wire inlet section busbar, input voltage Ua of the wire inlet section busbar and output voltage Ub of the wire inlet section busbar; and calculating to obtain a contact resistance R1 of the incoming line segment busbar and a power loss W1 of the incoming line segment busbar according to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar.
Further, according to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar, the contact resistance R1 of the incoming line segment busbar and the power loss W1 of the incoming line segment busbar are calculated by the following formulas: r1 ═ (Ua-Ub)/I1; w1 ═ (Ua-Ub) × I1.
Further, detecting the contact resistance and the power loss of the segment busbar comprises the following steps: acquiring input voltage Uc of a bus bar at a wire outlet section, output voltage Ud of the bus bar at the wire outlet section and output current I2 of the bus bar at the wire outlet section; and calculating the contact resistance R2 of the outlet section busbar and the power loss W2 of the outlet section busbar according to the output current I2 of the outlet section busbar, the input voltage Uc of the outlet section busbar and the output voltage Ud of the outlet section busbar.
Further, according to the output current I2 of the outlet section busbar, the input voltage Uc of the outlet section busbar and the output voltage Ud of the outlet section busbar, the contact resistance R2 of the outlet section busbar and the power loss W2 of the outlet section busbar are calculated by the following formulas: r2 ═ I2 (Uc-Ud); w2 ═ I2 (Uc-Ud).
Further, detecting power loss of the electronic switching device includes: calculating to obtain total inlet wire power Win according to the input current I1 of the inlet wire section busbar and the input voltage Ua of the inlet wire section busbar; calculating to obtain total outlet power Wout according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar; and calculating to obtain the power loss Wj of the electronic switching device according to the inlet wire total power Win, the outlet wire total power Wout, the power loss W1 of the inlet wire section busbar and the power loss W2 of the outlet wire section busbar.
Further, according to the input current I1 of the incoming line segment busbar and the input voltage Ua of the incoming line segment busbar, the incoming line total power Win is calculated by the following formula: win ═ Ua ═ I1; according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar, the total outlet power Wout is calculated by the following formula: wout ═ Ud ═ I2; according to the incoming line total power Win, the outgoing line total power Wout, the power loss W1 of the incoming line section busbar and the power loss W2 of the outgoing line section busbar, the power loss Wj of the electronic switching device is obtained through the following formula: Wj-Win-Wout-W1-W2.
Further, judging whether the working parameters meet the preset requirements includes: judging whether the working parameters meet at least one of the following conditions: the contact resistance of the incoming line segment busbar is greater than the preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than the preset maximum power; the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power; the power loss of the electronic switching device is larger than the preset maximum power.
Further, adjusting the current of the converter comprises: and reducing the current of the converter until the target current is preset.
Further, while adjusting the current of the converter, the method further comprises the following steps: and sending early warning information to a management platform of the converter.
Further, the method further comprises: storing historical data of contact resistance of the incoming section busbar and the outgoing section busbar; judging whether the current contact resistance of the incoming section busbar and the outgoing section busbar is abnormal or not according to the historical data; and when the current contact resistance of the incoming section busbar and/or the outgoing section busbar is abnormal, controlling the converter to stop running and sending early warning information to a management platform of the converter.
According to another aspect of the embodiments of the present invention, there is provided a converter control apparatus including: the detection module is used for detecting working parameters of components in the converter; the judging module is used for judging whether the working parameters meet the preset requirements or not; and the adjusting module is used for adjusting the current of the converter when the working parameters meet the preset requirements.
Further, the component includes: a busbar and an electronic switching device; the detection module includes: the first detection unit is used for detecting the contact resistance and the power loss of the incoming line segment busbar; the second detection unit is used for detecting the contact resistance and the power loss of the outlet section busbar; a third detection unit for detecting power loss of the electronic switching device; the bus bar comprises a line incoming section bus bar and a line outgoing section bus bar.
Further, the judging module is further configured to: judging whether the working parameters meet at least one of the following conditions: the contact resistance of the incoming line segment busbar is greater than the preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than the preset maximum power; the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power; the power loss of the electronic switching device is larger than the preset maximum power.
According to another aspect of the embodiments of the present invention, there is provided a converter control system including: the busbar is used for transmitting system current; the electronic switching device is connected with the busbar and used for controlling the on-off of current in the converter; and the control device is connected with the busbar and the electronic switching device and used for detecting working parameters of the busbar and the electronic switching device, judging whether the working parameters meet preset requirements or not, and adjusting the current of the converter when the working parameters meet the preset requirements.
Furthermore, the busbar comprises a wire inlet section busbar and a wire outlet section busbar; the working parameters of the busbar comprise: the contact resistance and the power loss of the incoming line segment busbar and the contact resistance and the power loss of the outgoing line segment busbar; the operating parameters of the electronic switching device include: power loss of the electronic switching device.
Further, the control device includes: the sampling module is respectively connected with the incoming line section busbar and the outgoing line section busbar and is used for acquiring the electrical parameters of the incoming line section busbar and the outgoing line section busbar; the processing module is connected with the sampling module and used for determining working parameters of the incoming line segment busbar, the outgoing line segment busbar and the electronic switching device according to the electrical parameters and judging whether the working parameters meet preset requirements or not; and the control module is connected with the processing module and used for adjusting the current of the converter when the working parameters meet the preset requirements.
Further, the control device further includes: and the early warning module is used for sending early warning information to a management platform of the converter while adjusting the current of the converter.
Further, the control device further includes: the storage module is used for storing historical data of the contact resistance of the incoming line segment busbar and the contact resistance of the outgoing line segment busbar; the control module is further configured to: and judging whether the current contact resistance of the incoming section busbar and the outgoing section busbar is abnormal or not according to the historical data, controlling the converter to stop running when the current contact resistance of the incoming section busbar and/or the outgoing section busbar is abnormal, and sending early warning information to a management platform of the converter.
According to another aspect of the embodiments of the present invention, there is provided a current transformer, including: such as the converter control device described above.
According to a further aspect of the embodiments of the present invention, there is provided a computer apparatus including a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the converter control method as described above.
According to a further aspect of an embodiment of the present invention, there is provided a storage medium containing computer executable instructions for performing the converter control method as described above when executed by a computer processor.
The invention provides a converter control method, which is characterized in that whether working parameters meet preset requirements or not is judged by detecting the working parameters of components in a converter, and when the working parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Drawings
FIG. 1 is an alternative flow diagram of a converter control method according to an embodiment of the invention;
FIG. 2 is another alternative flow diagram of a converter control method according to an embodiment of the present invention;
fig. 3 is an alternative block diagram of a converter control apparatus according to an embodiment of the present invention; and
fig. 4 is an alternative block diagram of a converter control system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In preferred embodiment 1 of the present invention, a converter control method is provided, which may be directly applied to various converters, or may be applied to other devices having partial functions of the converter, and when the converter control method is specifically implemented, the converter control method may be implemented by installing software, APP, or writing a corresponding program in a controller of the converter or other devices. In particular, fig. 1 shows an alternative flow chart of the method, which, as shown in fig. 1, comprises the following steps S102-S106:
s102: detecting working parameters of components in the converter;
s104: judging whether the working parameters meet preset requirements or not;
s106: and when the working parameters meet the preset requirements, adjusting the current of the converter.
In the foregoing embodiment, a converter control method is provided, where whether a working parameter meets a preset requirement is determined by detecting a working parameter of a component in a converter, and when the working parameter meets the preset requirement, a current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
In a preferred embodiment of the present invention, the component includes: busbar and electronic switching device. Detecting the working parameters of components in the converter, comprising: detecting the contact resistance and power loss of the incoming line segment busbar; detecting the contact resistance and power loss of the bus bar of the wire outlet section; and, detecting a power loss of the electronic switching device; the bus bar comprises a line incoming section bus bar and a line outgoing section bus bar. Because the current passing through the main loop of the high-power converter is large, the contact resistance of the busbar connecting point is slightly increased, the dissipation power is rapidly increased, and the system is damaged. The change of the contact resistance and the loss power of an electronic switching device are monitored in real time on line through the loop connection point of the large current, early warning is carried out in real time, automatic control is carried out, personnel are informed in advance to maintain, and further expansion of faults and loss of the system caused by heating, such as burning loss and the like, is avoided.
In the above embodiment, detecting the contact resistance and the power loss of the incoming line segment busbar includes: acquiring input current I1 of a wire inlet section busbar, input voltage Ua of the wire inlet section busbar and output voltage Ub of the wire inlet section busbar; and calculating to obtain a contact resistance R1 of the incoming line segment busbar and a power loss W1 of the incoming line segment busbar according to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar. According to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar, calculating a contact resistance R1 of the incoming line segment busbar and the power loss W1 of the incoming line segment busbar by the following formula: r1 ═ (Ua-Ub)/I1; w1 ═ (Ua-Ub) × I1.
Further, detecting the contact resistance and the power loss of the segment busbar comprises the following steps: acquiring input voltage Uc of a bus bar at a wire outlet section, output voltage Ud of the bus bar at the wire outlet section and output current I2 of the bus bar at the wire outlet section; and calculating the contact resistance R2 of the outlet section busbar and the power loss W2 of the outlet section busbar according to the output current I2 of the outlet section busbar, the input voltage Uc of the outlet section busbar and the output voltage Ud of the outlet section busbar. According to the output current I2 of the outlet section busbar, the input voltage Uc of the outlet section busbar and the output voltage Ud of the outlet section busbar, calculating the contact resistance R2 of the outlet section busbar and the power loss W2 of the outlet section busbar by the following formula: r2 ═ I2 (Uc-Ud); w2 ═ I2 (Uc-Ud).
After determining the power loss of the incoming line segment busbar and the power loss of the outgoing line segment busbar, detecting the power loss of the electronic switching device, and the method comprises the following steps: calculating to obtain total inlet wire power Win according to the input current I1 of the inlet wire section busbar and the input voltage Ua of the inlet wire section busbar; calculating to obtain total outlet power Wout according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar; and calculating to obtain the power loss Wj of the electronic switching device according to the inlet wire total power Win, the outlet wire total power Wout, the power loss W1 of the inlet wire section busbar and the power loss W2 of the outlet wire section busbar. According to the input current I1 of the incoming line section busbar and the input voltage Ua of the incoming line section busbar, the total incoming line power Win is calculated through the following formula: win ═ Ua ═ I1; according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar, the total outlet power Wout is calculated by the following formula: wout ═ Ud ═ I2; according to the incoming line total power Win, the outgoing line total power Wout, the power loss W1 of the incoming line section busbar and the power loss W2 of the outgoing line section busbar, the power loss Wj of the electronic switching device is obtained through the following formula: Wj-Win-Wout-W1-W2.
In another preferred embodiment of the present invention, the determining whether the operating parameter meets the preset requirement includes: judging whether the working parameters meet at least one of the following conditions: the contact resistance of the incoming line segment busbar is greater than the preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than the preset maximum power; the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power; the power loss of the electronic switching device is larger than the preset maximum power.
Further, adjusting the current of the converter comprises: and reducing the current of the converter until the target current is preset. Besides the preset current, a preset corresponding relation between the reduced point flow and the power of the incoming line section busbar, the power of the outgoing line section busbar and the power loss of the electronic switching device can be set, and the reduced current amount is calculated according to the preset relation. While adjusting the current of converter, still include: and sending early warning information to a management platform of the converter.
Preferably, the method further comprises: storing historical data of contact resistance of the incoming section busbar and the outgoing section busbar; judging whether the current contact resistance of the incoming section busbar and the outgoing section busbar is abnormal or not according to the historical data; and when the current contact resistance of the incoming section busbar and/or the outgoing section busbar is abnormal, controlling the converter to stop running and sending early warning information to a management platform of the converter.
The processing module continuously monitors the voltage and the current between the starting point and the end point of the busbar connection in real time on line, and calculates the contact resistance and the power loss of the incoming busbar and the outgoing busbar and the loss power of the electronic switch. And if the loss power reaches or exceeds the threshold value, controlling the busbar loop to reduce the passing current, and simultaneously sending early warning information to a management system to remind a user of timely maintenance. And analyzing the variation trend and level of the contact resistance in real time by combining the recorded historical data. If the contact resistance is abnormal, the shutdown protection is carried out in time, alarm information is sent out, and active control is achieved.
In preferred embodiment 1 of the present invention, another converter control method is further provided, and specifically, fig. 2 shows an alternative flow chart of the method, as shown in fig. 2, the method includes the following steps:
starting;
initializing;
collecting incoming line current: i1, collecting voltage of a point A of an inlet wire: ua, collecting voltage of a point B of an inlet wire: ub;
calculating the contact resistance of the wire section: and R1 ═ (Ua-Ub)/I1, power consumption generated by line segment contact resistance is calculated: w1 ═ (Ua-Ub) × I1;
judging whether the incoming line section contact resistance R1 is larger than a preset maximum contact resistance RO or not, judging whether the power consumption W1 generated by the incoming line section contact resistance is larger than a preset maximum power W0 or not, and outputting early warning information and limiting the output power when R1 is larger than RO and W1 is larger than W0;
otherwise, collecting the outgoing line current: i2, collecting voltage of a point C of the wire: uc, collecting voltage of a point D of the outgoing line: ud;
calculating the contact resistance of the wire outlet section: and R2 is (Uc-Ud)/I2, and the power consumption generated by the contact resistance of the line segment is calculated as follows: w2 ═ (Uc-Ud) × I2;
judging whether the contact resistance R2 of the outgoing line section is larger than the preset maximum contact resistance RO or not, judging whether the power consumption W2 generated by the contact resistance of the outgoing line section is larger than the preset maximum power W0 or not, and outputting early warning information and limiting the output power when R2 is larger than RO and W2 is larger than W0;
otherwise, calculating the total incoming power: win ═ Ua ═ I1, calculate total power of outgoing lines: and Wout is Ud I2, calculating the loss power of the electronic switching device: Wj-Win-Wout-W1-W2;
when judging whether the loss power Wj of the electronic switching device is larger than the preset maximum power W0 and the Wj is larger than W0, outputting early warning information and limiting the output power;
otherwise, repeatedly executing acquisition of incoming line current: i1, collecting voltage of a point A of an inlet wire: ua, collecting voltage of a point B of an inlet wire: ub.
In the foregoing embodiment, a converter control method is provided, where whether a working parameter meets a preset requirement is determined by detecting a working parameter of a component in a converter, and when the working parameter meets the preset requirement, a current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Example 2
Based on the converter control method provided in the foregoing embodiment 1, in a preferred embodiment 2 of the present invention, there is further provided a converter control apparatus, and specifically, fig. 3 shows an alternative structural block diagram of the apparatus, and as shown in fig. 3, the apparatus includes:
the detection module 302 is used for detecting working parameters of components in the converter;
the judging module 304 is connected with the detecting module 302 and used for judging whether the working parameters meet the preset requirements or not;
and the adjusting module 306 is connected with the judging module 304 and is used for adjusting the current of the converter when the working parameter meets the preset requirement.
In the above embodiment, whether the operating parameters meet the preset requirements is determined by detecting the operating parameters of the components in the converter, and when the operating parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Wherein, components and parts include: a busbar and an electronic switching device; the detection module includes: the first detection unit is used for detecting the contact resistance and the power loss of the incoming line segment busbar; the second detection unit is used for detecting the contact resistance and the power loss of the outlet section busbar; a third detection unit for detecting power loss of the electronic switching device; the bus bar comprises a line incoming section bus bar and a line outgoing section bus bar.
Further, the judging module is further configured to: judging whether the working parameters meet at least one of the following conditions: the contact resistance of the incoming line segment busbar is greater than the preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than the preset maximum power; the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power; the power loss of the electronic switching device is larger than the preset maximum power.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Example 3
In a preferred embodiment 3 of the present invention, there is further provided a converter control system, and specifically, fig. 4 shows an alternative structural block diagram of the system, and as shown in fig. 4, the system includes:
the busbar is used for transmitting system current;
the electronic switching device is connected with the busbar and used for controlling the on-off of the converter;
and the control device is connected with the busbar and the electronic switching device and used for detecting working parameters of the busbar and the electronic switching device, judging whether the working parameters meet preset requirements or not, and adjusting the current of the converter when the working parameters meet the preset requirements.
In the above embodiment, whether the operating parameters meet the preset requirements is determined by detecting the operating parameters of the components in the converter, and when the operating parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
The control device is composed of a sampling module, a processing module, a control module and a storage module. The functions of the modules are as follows:
(1) the sampling module is responsible for collecting current I1 of the incoming busbar, voltage Ua at the front end and voltage Ub at the rear end of the incoming busbar, voltages Uc and Ud at two ends of the outgoing busbar and outgoing current I2.
(2) The processing module is responsible for calculating the contact resistance of the incoming line section: r1 ═ (Ua-Ub)/I1, the power consumption generated by the line segment contact resistance was calculated: w1 ═ (Ua-Ub) × I1; calculating the contact resistance of the wire outlet section: r2 ═ I2 (Uc-Ud); calculating the power consumption generated by the contact resistance of the wire outlet section: w2 ═ I2 (Uc-Ud). And judging whether the power consumption W1 or W2 generated by the contact resistor is larger than a preset value W0, if the processor detects that the condition is met, sending out early warning information, and simultaneously limiting the output power of the system through the control module to achieve the purposes of reducing loss and protecting the system.
The processing module is simultaneously responsible for calculating the total incoming line power: win ═ Ua ═ I1; calculating the total power of the outgoing lines: wout ═ Ud ═ I2; calculating the loss power of the electronic switching device: Wj-Win-Wout-W1-W2. And if the loss power Wj of the electronic switching device is judged to be larger than the preset value W0, early warning information is sent out, and the output power of the system is limited by the control module, so that the purposes of reducing loss and protecting the electronic switching device are achieved.
(3) The control module is responsible for executing the processing result of the processing module, executing the switching instruction of the electronic switching tube and sending early warning information to the upper management platform.
(4) The storage module is responsible for recording historical data such as the change level and the state of the contact resistance value, and the processing module analyzes and judges the historical data. And if the processing module judges that the current contact resistance value is abnormally increased according to the historical data, performing forced shutdown protection and sending alarm information.
Example 4
In a preferred embodiment 4 of the present invention, there is also provided a current transformer, including: the inverter control device according to embodiment 2 described above.
In the above embodiment, whether the operating parameters meet the preset requirements is determined by detecting the operating parameters of the components in the converter, and when the operating parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Example 5
In a preferred embodiment 5 of the present invention, there is also provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the converter control method as in embodiment 1 above.
In the above embodiment, whether the operating parameters meet the preset requirements is determined by detecting the operating parameters of the components in the converter, and when the operating parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Example 6
There is also provided in a preferred embodiment 6 of the present invention a storage medium containing computer executable instructions which when executed by a computer processor are for performing the converter control method of embodiment 1 as described above.
In the above embodiment, whether the operating parameters meet the preset requirements is determined by detecting the operating parameters of the components in the converter, and when the operating parameters meet the preset requirements, the current of the converter is adjusted. By the method, when the working parameters of the components meet preset conditions, for example, the power consumption reaches the maximum value, the current of the converter can be adjusted, so that the damage of the converter caused by heating caused by the increase of the power loss of the converter busbar and the electronic switch device in the unit operation process is avoided, the converter is better protected, and the operation safety of the converter is improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (22)
1. A converter control method, comprising:
detecting working parameters of components in the converter;
judging whether the working parameters meet preset requirements or not;
when the working parameters meet preset requirements, adjusting the current of the converter;
wherein, components and parts include: the bus bar and the electronic switching device are connected with the bus bar; the bus comprises a wire inlet section bus and a wire outlet section bus;
the detecting the working parameters of the components in the converter comprises the following steps: detecting the power loss of the electronic switching device:
calculating to obtain total inlet wire power Win according to the input current I1 of the inlet wire section busbar and the input voltage Ua of the inlet wire section busbar;
calculating to obtain total outlet power Wout according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar;
and calculating to obtain the power loss Wj of the electronic switching device according to the incoming total power Win, the outgoing total power Wout, the power loss W1 of the incoming section busbar and the power loss W2 of the outgoing section busbar.
2. The method of claim 1, wherein said detecting an operating parameter of a component in said converter further comprises:
detecting the contact resistance and power loss of the incoming line segment busbar; and the number of the first and second groups,
and detecting the contact resistance and power loss of the bus bar of the outlet section.
3. The method of claim 2, wherein the detecting the contact resistance and the power loss of the incoming line segment busbar comprises:
acquiring input current I1 of the incoming line segment busbar, input voltage Ua of the incoming line segment busbar and output voltage Ub of the incoming line segment busbar;
and calculating to obtain a contact resistance R1 of the incoming line segment busbar and a power loss W1 of the incoming line segment busbar according to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar.
4. The method according to claim 3, wherein the contact resistance R1 of the incoming line segment busbar and the power loss W1 of the incoming line segment busbar are calculated according to the input current I1 of the incoming line segment busbar, the input voltage Ua of the incoming line segment busbar and the output voltage Ub of the incoming line segment busbar by the following formulas:
R1＝(Ua-Ub)/I1；
W1＝(Ua-Ub)*I1。
5. the method of claim 3, wherein the detecting the contact resistance and the power loss of the bus bar in the outlet section comprises:
acquiring an input voltage Uc of the outlet section busbar, an output voltage Ud of the outlet section busbar and an output current I2 of the outlet section busbar;
and calculating the contact resistance R2 of the outlet section busbar and the power loss W2 of the outlet section busbar according to the output current I2 of the outlet section busbar, the input voltage Uc of the outlet section busbar and the output voltage Ud of the outlet section busbar.
6. The method as claimed in claim 5, wherein the contact resistance R2 of the outlet segment busbar and the power loss W2 of the outlet segment busbar are calculated according to the output current I2 of the outlet segment busbar, the input voltage Uc of the outlet segment busbar and the output voltage Ud of the outlet segment busbar by the following formulas:
R2＝(Uc-Ud)/I2；
W2＝(Uc-Ud)*I2。
7. the method of claim 1,
according to the input current I1 of the incoming line segment busbar and the input voltage Ua of the incoming line segment busbar, the total incoming line power Win is obtained through the following formula: win ═ Ua ═ I1;
according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar, the total outlet power Wout is calculated by the following formula: wout ═ Ud ═ I2;
calculating the power loss Wj of the electronic switching device according to the incoming total power Win, the outgoing total power Wout, the power loss W1 of the incoming section busbar and the power loss W2 of the outgoing section busbar by the following formula: Wj-Win-Wout-W1-W2.
8. The method of claim 2, wherein the determining whether the operating parameter meets a predetermined requirement comprises:
judging whether the working parameters meet at least one of the following conditions:
the contact resistance of the incoming line segment busbar is greater than a preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than a preset maximum power;
the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power;
the power loss of the electronic switching device is larger than the preset maximum power.
9. The method of claim 1, wherein said adjusting the current of said current transformer comprises:
and reducing the current of the converter until a preset target current.
10. The method of claim 1, further comprising, while said adjusting the current of said converter:
and sending early warning information to a management platform of the converter.
11. The method of claim 2, further comprising:
storing historical data of contact resistance of the incoming section busbar and the outgoing section busbar;
judging whether the current contact resistance of the incoming line segment busbar and the outgoing line segment busbar is abnormal or not according to the historical data;
and when the current contact resistance of the incoming line segment busbar and/or the outgoing line segment busbar is abnormal, controlling the converter to stop running and sending early warning information to a management platform of the converter.
12. A converter control apparatus, comprising:
the detection module is used for detecting working parameters of components in the converter;
the judging module is used for judging whether the working parameters meet preset requirements or not;
the adjusting module is used for adjusting the current of the converter when the working parameters meet preset requirements;
the component includes: the bus bar and the electronic switching device are connected with the bus bar; the bus comprises a wire inlet section bus and a wire outlet section bus;
the detection module comprises: a third detection unit for detecting a power loss of the electronic switching device;
the third detection unit is specifically configured to: calculating to obtain total inlet wire power Win according to the input current I1 of the inlet wire section busbar and the input voltage Ua of the inlet wire section busbar; calculating to obtain total outlet power Wout according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar; and calculating to obtain the power loss Wj of the electronic switching device according to the incoming total power Win, the outgoing total power Wout, the power loss W1 of the incoming section busbar and the power loss W2 of the outgoing section busbar.
13. The apparatus of claim 12, wherein the detection module further comprises:
the first detection unit is used for detecting the contact resistance and the power loss of the incoming line segment busbar;
and the second detection unit is used for detecting the contact resistance and the power loss of the outgoing line section busbar.
14. The apparatus of claim 13, wherein the determining module is further configured to: judging whether the working parameters meet at least one of the following conditions:
the contact resistance of the incoming line segment busbar is greater than a preset maximum contact resistance, and the power loss of the incoming line segment busbar is greater than a preset maximum power;
the contact resistance of the outlet section busbar is greater than the preset maximum contact resistance, and the power loss of the outlet section busbar is greater than the preset maximum power;
the power loss of the electronic switching device is larger than the preset maximum power.
15. A converter control system, comprising:
the busbar is used for transmitting system current;
the electronic switching device is connected with the busbar and used for controlling the on-off of the current in the converter;
the control device is connected with the busbar and the electronic switching device and used for detecting working parameters of the busbar and the electronic switching device, judging whether the working parameters meet preset requirements or not, and adjusting the current of the converter when the working parameters meet the preset requirements;
the bus comprises a wire inlet section bus and a wire outlet section bus; the operating parameters of the electronic switching device include: the power loss of the electronic switching device is obtained by the following method: calculating to obtain total inlet wire power Win according to the input current I1 of the inlet wire section busbar and the input voltage Ua of the inlet wire section busbar; calculating to obtain total outlet power Wout according to the output current I2 of the outlet section busbar and the output voltage Ud of the outlet section busbar; and calculating to obtain the power loss Wj of the electronic switching device according to the incoming total power Win, the outgoing total power Wout, the power loss W1 of the incoming section busbar and the power loss W2 of the outgoing section busbar.
16. The system of claim 15, wherein the operating parameters of the busbar include: the contact resistance and the power loss of the incoming line segment busbar and the contact resistance and the power loss of the outgoing line segment busbar.
17. The system of claim 16, wherein the control device comprises:
the sampling module is respectively connected with the incoming line section busbar and the outgoing line section busbar and is used for acquiring electrical parameters of the incoming line section busbar and the outgoing line section busbar;
the processing module is connected with the sampling module and used for determining working parameters of the incoming line segment busbar, the outgoing line segment busbar and the electronic switching device according to the electrical parameters and judging whether the working parameters meet preset requirements or not;
and the control module is connected with the processing module and used for adjusting the current of the converter when the working parameters meet the preset requirements.
18. The system of claim 15, wherein the control device further comprises:
and the early warning module is used for sending early warning information to a management platform of the converter while adjusting the current of the converter.
19. The system of claim 16, wherein the control device further comprises:
the storage module is used for storing the contact resistance of the incoming section busbar and the historical data of the contact resistance of the outgoing section busbar;
the control module is further configured to: and judging whether the current contact resistance of the incoming line segment busbar and the outgoing line segment busbar is abnormal or not according to the historical data, controlling the converter to stop running when the current contact resistance of the incoming line segment busbar and/or the outgoing line segment busbar is abnormal, and sending early warning information to a management platform of the converter.
20. A current transformer, comprising: the converter control apparatus of any one of claims 12 to 14.
21. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the converter control method according to any of claims 1 to 11 when executing the program.
22. A storage medium containing computer executable instructions for performing the converter control method of any one of claims 1 to 11 when executed by a computer processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810974801.6A CN109194105B (en) | 2018-08-24 | 2018-08-24 | Converter control method, device and system and converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810974801.6A CN109194105B (en) | 2018-08-24 | 2018-08-24 | Converter control method, device and system and converter |
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| CN109194105B true CN109194105B (en) | 2020-04-14 |
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| CN1512657A (en) * | 2002-12-26 | 2004-07-14 | 三电有限公司 | Motor control system |
| CN105846752A (en) * | 2015-01-29 | 2016-08-10 | 通用汽车环球科技运作有限责任公司 | Derating control of a power inverter module |
| CN107390019A (en) * | 2016-05-17 | 2017-11-24 | 南京捷泰电力设备有限公司 | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption |
| WO2018051719A1 (en) * | 2016-09-14 | 2018-03-22 | サンデン・オートモーティブコンポーネント株式会社 | Inverter apparatus and vehicle electric compressor provided with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1512657A (en) * | 2002-12-26 | 2004-07-14 | 三电有限公司 | Motor control system |
| CN105846752A (en) * | 2015-01-29 | 2016-08-10 | 通用汽车环球科技运作有限责任公司 | Derating control of a power inverter module |
| CN107390019A (en) * | 2016-05-17 | 2017-11-24 | 南京捷泰电力设备有限公司 | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption |
| WO2018051719A1 (en) * | 2016-09-14 | 2018-03-22 | サンデン・オートモーティブコンポーネント株式会社 | Inverter apparatus and vehicle electric compressor provided with same |
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