CN103715663B - The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng - Google Patents
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng Download PDFInfo
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- CN103715663B CN103715663B CN201410011445.XA CN201410011445A CN103715663B CN 103715663 B CN103715663 B CN 103715663B CN 201410011445 A CN201410011445 A CN 201410011445A CN 103715663 B CN103715663 B CN 103715663B
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Abstract
The invention discloses the software control method of a kind of bidirectional energy-storage grid-connection converter excess temperature power deratng, comprise the following steps: data store: temperature fall volume setting power curve and efficiency curve are stored with the form of corresponding table；Current Temperatures detects；Current power detects；Current DC voltage detection；Efficiency of selection power curve；Current efficiency determines；Fall volume setting power and the determination of efficiency thereof.Calculating determines fall volume target power: the initial gain value of fall volume target power compares with the product value of the product value of current efficiency with fall volume setting power with efficiency: if more than or equal to the product value of fall volume setting power with efficiency, then continue to diminish the performance number of fall volume target power, until the product value of the performance number of fall volume target power and its efficiency is less than the product value of fall volume setting power with efficiency.Owing to using said method, it is ensured that bidirectional energy-storage grid-connection converter, in the case of excess temperature power deratng, maintains higher power charging and discharging.
Description
Technical field
The present invention relates to a kind of bidirectional energy-storage grid-connection converter, the software control method of a kind of bidirectional energy-storage grid-connection converter excess temperature power deratng.
Background technology
State Intellectual Property Office discloses Publication No. CN202872349U on April 10th, 2013, patent name is to utilize IGBT temperature to control the utility model patent that the Circuits System of volume drops in inverter output power, this utility model relates to a kind of Circuits System utilizing IGBT temperature to control inverter output power fall volume, including NTC resistance signal port, sample circuit, gating circuit and decision circuitry, described NTC resistance signal port connects sample circuit, sample circuit connects gating circuit and decision circuitry, described gating circuit connects an output port, this output port is connected with inverter control plate, described decision circuitry is connected with a logic circuit, this logic circuit and a display lamp maximum temperature loop connect.The beneficial effects of the utility model are: this utility model, without additional extra temperature sensor, can reduce the cost of raw material；And by rational detection means, it is greatly improved the precision of temperature detection, and then substantially increases the service behaviour to inverter overheating protection.
Bidirectional energy-storage grid-connection converter is mainly used in, enough at energy-storage units energy, and electrical network demand bigger moment is converted into, energy-storage units unidirectional current, the alternating current that electrical network is corresponding；When and energy-storage units energy starvation less in electrical network demand, the unidirectional current that the AC conversion of electrical network is energy-storage units is charged.It realizes process and is dependent on transistor constant power element and constantly opens, turn off, and power device is under high-frequency switch conditions, inherently produce more heat transfer, temperature is caused to rise, and under temperature conditions rugged environment, its operating temperature can be higher, thus can cause bidirectional energy-storage grid-connection converter job insecurity.This is accomplished by bidirectional energy-storage grid-connection converter and carries out the fall volume process of power when temperature is too high.
The processing method of traditional excess temperature power deratng; it is all simple only according to current bidirectional energy-storage grid-connection converter temperature value; and directly reduce charge power, grid-connected discharge power; prevent the continuation of bidirectional energy-storage grid-connection converter temperature from rising by this method crossing temperature drop volume, it is achieved the protection to bidirectional energy-storage grid-connection converter.But although this kind of method can realize controlling the purpose of operating temperature, but can make bidirectional energy-storage grid-connection converter originally in the case of originally can carrying high charge power, high discharge power, by force power is dragged down, cause bidirectional energy-storage grid-connection converter utilization rate to reduce, off-energy.
Summary of the invention
In place of present invention aim to address above-mentioned technical deficiency, it is provided that the software control method of a kind of bidirectional energy-storage grid-connection converter excess temperature power deratng.The method can guarantee that bidirectional energy-storage grid-connection converter, in the case of excess temperature power deratng, maintains higher power charging and discharging.
For achieving the above object, the technical solution adopted in the present invention is:
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng, comprises the following steps:
A, data store: store temperature-fall volume setting power curve and efficiency curve with the form of corresponding table；Described efficiency curve is divided into efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode, obtains efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode in bidirectional energy-storage grid-connection converter test process；
B, Current Temperatures detect: utilize temperature detecting module to detect the Current Temperatures of bidirectional energy-storage grid-connection converter；
C, current power detect: utilizing power detection module to detect the current power of bidirectional energy-storage grid-connection converter, the current power value obtained is the initial gain value of fall volume target power；
D, current DC voltage detect: input direct voltage detection module obtains the current DC voltage of changer input；
E, efficiency of selection power curve: the current DC voltage value that utilization detects determines that the mode of operation of current bidirectional energy-storage grid-connection converter is charge mode or grid-connected discharge mode, thus selects efficiency curve or the efficiency curve of grid-connected discharge mode of charge mode；
F, current efficiency determine: pass through the corresponding table of efficiency curve according to the current power detected, can check in the current efficiency that this current power is corresponding；
G, fall volume setting power and the determination of efficiency thereof: pass through the corresponding table of temperature-fall volume setting power curve according to the Current Temperatures detected, can check in the fall volume setting power that this Current Temperatures is corresponding, can check in the efficiency of correspondence by fall volume setting power.
H, calculating determine fall volume target power: the initial gain value of fall volume target power and the product value of current efficiency compare with dropping the volume setting power product value with efficiency:
nullWhen the product value of the initial gain value with current efficiency that drop volume target power is more than or equal to the product value of fall volume setting power and efficiency，The performance number of fall volume target power is set，The performance number making fall volume target power diminishes，And according to the performance number the set corresponding table by efficiency curve，The efficiency that this performance number is corresponding can be checked in，The product value of the efficiency that this performance number is corresponding with this performance number compares again with the product value of fall volume setting power with efficiency，If the product value of the efficiency that this performance number is corresponding with this performance number is also greater than or equal to the product value of fall volume setting power and efficiency，Then continue to diminish the performance number of fall volume target power，Until the product value of the performance number of fall volume target power and its efficiency is less than the product value of fall volume setting power with efficiency，Now bidirectional energy-storage grid-connection converter will be operated with the performance number of fall volume target power now；
When the product value of the initial gain value with current efficiency that drop volume target power is less than the product value of fall volume setting power and efficiency, bidirectional energy-storage grid-connection converter also proceeds work with the performance number of fall volume target power now.
In the step of described data storage, temperature-fall volume setting power curve and efficiency curve are stored in storage chip with the form of corresponding table or are integrated in control software.
In described storage chip or control software, also storage has temperature protection threshold values and crosses temperature drop volume threshold values.
Described Current Temperatures detection step in, after Current Temperatures has detected, software by Current Temperatures compared with temperature protection threshold values:
If Current Temperatures is more than or equal to temperature protection threshold values, bidirectional energy-storage grid-connection converter hard stop；If Current Temperatures is less than temperature protection threshold values, Current Temperatures is compared with crossing temperature drop volume threshold values:
If Current Temperatures was less than temperature drop volume threshold values, then exited temperature drop volume program；If Current Temperatures was more than or equal to temperature drop volume threshold values, software then initially enters the step of current power detection.
Described temperature detecting module is to be integrated in the temperature sensor within IGBT or independent temperature sampling circuit.
Beneficial effects of the present invention: owing to using the software control method of above-mentioned bidirectional energy-storage grid-connection converter excess temperature power deratng, solve traditional bidirectional energy-storage grid-connection converter originally in the case of originally can carrying high charge power, high discharge power, by force power is carried out the defect dragged down, ensure that bidirectional energy-storage grid-connection converter, in the case of excess temperature power deratng, maintains higher power charging and discharging.
Accompanying drawing explanation
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the flow chart of the software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng；
Fig. 2 is bidirectional energy-storage grid-connection converter temperature detection and the flow chart of software control.
Detailed description of the invention
As it is shown in figure 1, the software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng, comprise the following steps:
A, data store:
Temperature-fall volume setting power curve and efficiency curve are stored with the form of corresponding table；Described efficiency curve is divided into efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode, obtains efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode in bidirectional energy-storage grid-connection converter test process；
B, Current Temperatures detect:
Utilize temperature detecting module that the Current Temperatures of bidirectional energy-storage grid-connection converter is detected；
C, current power detect:
Utilizing power detection module to detect the current power of bidirectional energy-storage grid-connection converter, the current power value obtained is the initial gain value of fall volume target power；
D, current DC voltage detect:
Input direct voltage detection module obtains the current DC voltage of changer input；
E, efficiency of selection power curve:
The current DC voltage value that utilization detects determines that the mode of operation of current bidirectional energy-storage grid-connection converter is charge mode or grid-connected discharge mode, thus selects efficiency curve or the efficiency curve of grid-connected discharge mode of charge mode；
F, current efficiency determine: pass through the corresponding table of efficiency curve according to the current power detected, can check in the current efficiency that this current power is corresponding；Corresponding table is as shown in table 1:
Table 1
| Power percentage | Charge efficiency value | Grid-connected discharging efficiency value |
| 0 | η_Charge0 | η_Discharge0 |
| 5 | η_Charge5 | η_Discharge5 |
| 10 | η_Charge10 | η_Discharge10 |
| 15 | η_Charge15 | η_Discharge15 |
| 20 | η_Charge20 | η_Discharge20 |
| 25 | η_Charge25 | η_Discharge25 |
| 30 | η_Charge30 | η_Discharge30 |
| 35 | η_Charge35 | η_Discharge35 |
| 40 | η_Charge40 | η_Discharge40 |
| 45 | η_Charge45 | η_Discharge45 |
| 50 | η_Charge50 | η_Discharge50 |
| 55 | η_Charge55 | η_Discharge55 |
| 60 | η_Charge60 | η_Discharge60 |
| 65 | η_Charge65 | η_Discharge65 |
| 70 | η_Charge70 | η_Discharge70 |
| 75 | η_Charge75 | η_Discharge75 |
| 80 | η_Charge80 | η_Discharge80 |
| 85 | η_Charge85 | η_Discharge85 |
| 90 | η_Charge90 | η_Discharge90 |
| 95 | η_Charge95 | η_Discharge95 |
| 100 | η_Charge100 | η_Discharge100 |
G, fall volume setting power and the determination of efficiency thereof:
According to the Current Temperatures the detected corresponding table by temperature-fall volume setting power curve, the fall volume setting power that this Current Temperatures is corresponding can be checked in, the efficiency of correspondence can be checked in by fall volume setting power.
H, calculate and determine fall volume target power:
nullThe initial gain value of fall volume target power compares with the product value of the product value of current efficiency with fall volume setting power with efficiency: when the product value of the initial gain value with current efficiency that drop volume target power is more than or equal to the product value of fall volume setting power and efficiency，The performance number of fall volume target power is set，The performance number making fall volume target power diminishes，And according to the performance number the set corresponding table by efficiency curve，The efficiency that this performance number is corresponding can be checked in，The product value of the efficiency that this performance number is corresponding with this performance number compares again with the product value of fall volume setting power with efficiency，If the product value of the efficiency that this performance number is corresponding with this performance number is also greater than or equal to the product value of fall volume setting power and efficiency，Then continue to diminish the performance number of fall volume target power，Until the product value of the performance number of fall volume target power and its efficiency is less than the product value of fall volume setting power with efficiency，Now bidirectional energy-storage grid-connection converter will be operated with the performance number of fall volume target power now；When the product value of the initial gain value with current efficiency that drop volume target power is less than the product value of fall volume setting power and efficiency, bidirectional energy-storage grid-connection converter also proceeds work with the performance number of fall volume target power now.
In the step of described data storage, temperature-fall volume setting power curve and efficiency curve are stored in storage chip with the form of corresponding table or are integrated in control software.
In described storage chip or control software, also storage has temperature protection threshold values and crosses temperature drop volume threshold values.Described temperature detecting module is to be integrated in the temperature sensor within IGBT or independent temperature sampling circuit.
As in figure 2 it is shown, described Current Temperatures detection step in, after Current Temperatures detect, software by Current Temperatures compared with temperature protection threshold values, if Current Temperatures be more than or equal to temperature protection threshold values, bidirectional energy-storage grid-connection converter hard stop；If Current Temperatures is less than temperature protection threshold values, Current Temperatures is compared with crossing temperature drop volume threshold values: if Current Temperatures was less than temperature drop volume threshold values, then exited temperature drop volume program；If Current Temperatures was more than or equal to temperature drop volume threshold values, software then initially enters the step of current power detection.
The above is the preferred embodiment of the present invention; certainly the interest field of the present invention can not be limited with this; should be understood that; for those skilled in the art; technical scheme is modified or equivalent, without departure from the protection domain of technical solution of the present invention.
Claims (5)
1. the software control method of a bidirectional energy-storage grid-connection converter excess temperature power deratng, it is characterised in that: comprise the following steps: A, data store: temperature-fall volume setting power curve and efficiency curve are stored with the form of corresponding table；Described efficiency curve is divided into efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode, obtains efficiency curve and the efficiency curve of grid-connected discharge mode of charge mode in bidirectional energy-storage grid-connection converter test process；B, Current Temperatures detect: utilize temperature detecting module to detect the Current Temperatures of bidirectional energy-storage grid-connection converter；C, current power detect: utilizing power detection module to detect the current power of bidirectional energy-storage grid-connection converter, the current power value obtained is the initial gain value of fall volume target power；D, current DC voltage detect: input direct voltage detection module obtains the current DC voltage of changer input；E, efficiency of selection power curve: the current DC voltage value that utilization detects determines that the mode of operation of current bidirectional energy-storage grid-connection converter is charge mode or grid-connected discharge mode, thus selects efficiency curve or the efficiency curve of grid-connected discharge mode of charge mode；F, current efficiency determine: pass through the corresponding table of efficiency curve according to the current power detected, can check in the current efficiency that this current power is corresponding；G, fall volume setting power and the determination of efficiency thereof: pass through the corresponding table of temperature-fall volume setting power curve according to the Current Temperatures detected, can check in the fall volume setting power that this Current Temperatures is corresponding, can check in the efficiency of correspondence by fall volume setting power；nullH、Calculating determines fall volume target power: the initial gain value of fall volume target power compares with the product value of the product value of current efficiency with fall volume setting power with efficiency: when the product value of the initial gain value with current efficiency that drop volume target power is more than or equal to the product value of fall volume setting power and efficiency thereof，The performance number of fall volume target power is set，The performance number making fall volume target power diminishes，And according to the performance number the set corresponding table by efficiency curve，The efficiency that this performance number is corresponding can be checked in，The product value of the efficiency that this performance number is corresponding with this performance number compares again with the product value of fall volume setting power with efficiency，If the product value of the efficiency that this performance number is corresponding with this performance number is also greater than or equal to the product value of fall volume setting power and efficiency thereof，Then continue to diminish the performance number of fall volume target power，Until the product value of the performance number of fall volume target power and its efficiency is less than the product value of fall volume setting power with efficiency，Now bidirectional energy-storage grid-connection converter will be operated with the performance number of fall volume target power now；When the product value of the initial gain value with current efficiency that drop volume target power is less than the product value of fall volume setting power and efficiency thereof, bidirectional energy-storage grid-connection converter also proceeds work with the performance number of fall volume target power now.
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng the most according to claim 1, it is characterized in that: in the step of described data storage, temperature-fall volume setting power curve and efficiency curve are stored in storage chip with the form of corresponding table or are integrated in control software.
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng the most according to claim 2, it is characterised in that: in described storage chip or control software, also storage has temperature protection threshold values and crosses temperature drop volume threshold values.
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng the most according to claim 3; it is characterized in that: in the step of described Current Temperatures detection; after Current Temperatures has detected; software by Current Temperatures compared with temperature protection threshold values; if Current Temperatures is more than or equal to temperature protection threshold values, bidirectional energy-storage grid-connection converter hard stop；If Current Temperatures is less than temperature protection threshold values, Current Temperatures is compared with crossing temperature drop volume threshold values: if Current Temperatures was less than temperature drop volume threshold values, then exited temperature drop volume program；If Current Temperatures was more than or equal to temperature drop volume threshold values, software then initially enters the step of current power detection.
The software control method of bidirectional energy-storage grid-connection converter excess temperature power deratng the most according to claim 1, it is characterised in that: described temperature detecting module is to be integrated in the temperature sensor within IGBT or independent temperature sampling circuit.
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| CN111049410B (en) * | 2019-12-31 | 2022-09-02 | 华为数字技术（苏州）有限公司 | Control method of electric energy conversion device and electric energy conversion system |
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