CN103715663A - Software control method with over-temperature power of bidirectional energy storage grid-connection converter derated - Google Patents
Software control method with over-temperature power of bidirectional energy storage grid-connection converter derated Download PDFInfo
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- CN103715663A CN103715663A CN201410011445.XA CN201410011445A CN103715663A CN 103715663 A CN103715663 A CN 103715663A CN 201410011445 A CN201410011445 A CN 201410011445A CN 103715663 A CN103715663 A CN 103715663A
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Abstract
The invention discloses a software control method over-temperature power of a bidirectional energy storage grid-connection converter derated. The software control method comprises the following steps that data are stored, a temperature-set derating power curve and an efficiency-power curve are stored in the mode of corresponding lists; current temperature is detected; current power is detected; current direct-current voltages are detected; the efficiency-power curve is selected; current efficiency is determined; the set derating power and the efficiency of the set derating power are determined. Derating target power is calculated and determined, the product value of the initial power value of the derating target power and the current efficiency is compared with the product value of the set derating power and the efficiency, and if the product value of the initial power value of the derating target power and the current efficiency is larger than or equal to the product value of the set derating power and the efficiency, the power value of the derating target power continues to be decreased until the product value of the power value and the efficiency of the derating target power is smaller than the product value of the set derating power and the efficiency. Due to the adoption of the method, the bidirectional energy storage grid-connection converter can maintain high power for charging and discharging with the over-temperature power derated.
Description
Technical field
The present invention relates to the grid-connected converter of a kind of bidirectional energy-storage, specifically the software control method of the grid-connected converter excess temperature of a kind of bidirectional energy-storage power deratng.
Background technology
It is CN202872349U that State Intellectual Property Office discloses publication number on April 10th, 2013, patent name is the utility model patent that utilizes the Circuits System of IGBT temperature control inverter power output derate, the utility model relates to a kind of Circuits System of the IGBT of utilization temperature control inverter power output derate, comprise 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 logical circuit, this logical circuit is connected with an indicator light maximum temperature loop.The beneficial effects of the utility model are: the utility model, without additional extra temperature sensor, can reduce the cost of raw material; And by rational detection means, greatly promoted the precision of temperature detection, and then greatly improved the service behaviour to inverter overheating protection.
The grid-connected converter of bidirectional energy-storage is mainly used in, enough at energy-storage units energy, and the larger moment of electrical network demand converts energy-storage units direct current the alternating current that electrical network is corresponding to; In the moment of and energy-storage units energy starvation less in electrical network demand, the direct current that the alternating current of electrical network is converted into energy-storage units charges.Its implementation procedure is to rely on transistor constant power element constantly to open, turn-off, and power device is in high-frequency switch situation, itself just produces more heat transfer, cause temperature to rise, and under temperature conditions rugged environment, its working temperature can be higher, thereby can cause the grid-connected converter job insecurity of bidirectional energy-storage.This derate that just needs the grid-connected converter of bidirectional energy-storage to carry out power when excess Temperature is processed.
The processing method of traditional excess temperature power deratng; all simple only according to the grid-connected converter temperature value of current bidirectional energy-storage; and directly reduce charge power, grid-connected discharge power; method by this excess temperature derate prevents that the continuation of the grid-connected converter temperature of bidirectional energy-storage from rising, and realizes the protection to the grid-connected converter of bidirectional energy-storage.Although yet this kind of method can realize the object of controlling working temperature, but can make the grid-connected converter of bidirectional energy-storage originally in originally carrying in the situation of high charge power, high discharge power, by force power is dragged down, cause the grid-connected converter utilance of bidirectional energy-storage to reduce, off-energy.
Summary of the invention
The object of the invention is to solve above-mentioned technical deficiency part, a kind of software control method of the grid-connected converter excess temperature of bidirectional energy-storage power deratng is provided.The method can guarantee that the grid-connected converter of bidirectional energy-storage, in excess temperature power deratng situation, 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 the grid-connected converter excess temperature of bidirectional energy-storage power deratng, comprises the following steps:
A, data storage: temperature-derate setting power curve and efficiency-power curve are stored with the form of correspondence table; Described efficiency-power curve is divided into the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode, in the grid-connected converter test process of bidirectional energy-storage, obtains the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode;
B, Current Temperatures detect: utilize temperature detecting module to detect the Current Temperatures of the grid-connected converter of bidirectional energy-storage;
C, current power detect: utilize power detection module to detect the current power of the grid-connected converter of bidirectional energy-storage, the current power value obtaining is the initial gain value of derate target power;
D, current direct voltage detect: input direct voltage detection module obtains the current direct voltage of converter input;
E, efficiency of selection-power curve: utilize the current DC voltage value detecting to determine that the mode of operation of the grid-connected converter of current bidirectional energy-storage is charge mode or grid-connected discharge mode, thereby select the efficiency-power curve of charge mode or the efficiency-power curve of grid-connected discharge mode;
F, current efficiency are determined: according to the current power detecting, by the correspondence table of efficiency-power curve, can check in current efficiency corresponding to this current power;
Determining of G, derate setting power and efficiency thereof: show by the correspondence of temperature-derate setting power curve according to the Current Temperatures detecting, can check in the derate setting power that this Current Temperatures is corresponding, can check in corresponding efficiency by derate setting power.
H, calculative determination derate target power: the product value of the initial gain value of derate target power and the product value of current efficiency and derate setting power and efficiency compares:
When the initial gain value of derate target power and the product value of current efficiency are more than or equal to the product value of derate setting power and efficiency, performance number to derate target power is set, the performance number of derate target power is diminished, and pass through the correspondence table of efficiency-power curve according to the performance number of setting, can check in efficiency corresponding to this performance number, the product value of the efficiency that this performance number is corresponding with this performance number and the product value of derate setting power and efficiency compare again, when if the product value of the efficiency that this performance number is corresponding with this performance number is still more than or equal to the product value of derate setting power and efficiency, continue the performance number of derate target power to diminish, until the performance number of derate target power and the product value of its efficiency are less than the product value of derate setting power and efficiency, now the grid-connected converter of bidirectional energy-storage carries out work by the performance number of the derate target power with now,
When the initial gain value of derate target power and the product value of current efficiency are less than the product value of derate setting power and efficiency, the grid-connected converter of bidirectional energy-storage is also proceeded work with the performance number of derate target power now.
In the step of described data storage, temperature-derate setting power curve and efficiency-power curve are stored in storage chip or are integrated in control software with the form of correspondence table.
In described storage chip or control software, also store temperature protection threshold values and excess temperature derate threshold values.
In the step that described Current Temperatures detects, after Current Temperatures has detected, software is compared Current Temperatures with temperature protection threshold values:
When if Current Temperatures is more than or equal to temperature protection threshold values, the grid-connected converter hard stop of bidirectional energy-storage; When if Current Temperatures is less than temperature protection threshold values, Current Temperatures and excess temperature derate threshold values are compared:
When if Current Temperatures is less than excess temperature derate threshold values, exit excess temperature derate program; When if Current Temperatures is more than or equal to excess temperature derate threshold values, software starts to enter the step that current power detects.
Described temperature detecting module is to be integrated in the temperature sensor of IGBT inside or temperature sampling circuit independently.
Beneficial effect of the present invention: owing to adopting the software control method of the grid-connected converter excess temperature of above-mentioned bidirectional energy-storage power deratng, solved the grid-connected converter of traditional bidirectional energy-storage originally in originally carrying in the situation of high charge power, high discharge power, the defect by force power being dragged down, guaranteed that the grid-connected converter of bidirectional energy-storage, in excess temperature power deratng situation, maintains higher power charging and discharging.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Fig. 1 is the flow chart of the software control method of the grid-connected converter excess temperature of bidirectional energy-storage power deratng;
Fig. 2 is the flow chart of the grid-connected converter temperature detection of bidirectional energy-storage and software control.
Embodiment
As shown in Figure 1, the software control method of the grid-connected converter excess temperature of bidirectional energy-storage power deratng, comprises the following steps:
A, data storage:
Temperature-derate setting power curve and efficiency-power curve are stored with the form of correspondence table; Described efficiency-power curve is divided into the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode, in the grid-connected converter test process of bidirectional energy-storage, obtains the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode;
B, Current Temperatures detect:
Utilize temperature detecting module to detect the Current Temperatures of the grid-connected converter of bidirectional energy-storage;
C, current power detect:
Utilize power detection module to detect the current power of the grid-connected converter of bidirectional energy-storage, the current power value obtaining is the initial gain value of derate target power;
D, current direct voltage detect:
Input direct voltage detection module obtains the current direct voltage of converter input;
E, efficiency of selection-power curve:
The current DC voltage value that utilization detects determines that the mode of operation of the grid-connected converter of current bidirectional energy-storage is charge mode or grid-connected discharge mode, thereby selects the efficiency-power curve of charge mode or the efficiency-power curve of grid-connected discharge mode;
F, current efficiency are determined: according to the current power detecting, by the correspondence table of efficiency-power curve, can check in current efficiency corresponding to this current power; 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 |
Determining of G, derate setting power and efficiency thereof:
According to the Current Temperatures detecting, by the correspondence of temperature-derate setting power curve, show, can check in the derate setting power that this Current Temperatures is corresponding, by derate setting power, can check in corresponding efficiency.
H, calculative determination derate target power:
The product value of the initial gain value of derate target power and the product value of current efficiency and derate setting power and efficiency compares: when the initial gain value of derate target power and the product value of current efficiency are more than or equal to the product value of derate setting power and efficiency, performance number to derate target power is set, the performance number of derate target power is diminished, and pass through the correspondence table of efficiency-power curve according to the performance number of setting, can check in efficiency corresponding to this performance number, the product value of the efficiency that this performance number is corresponding with this performance number and the product value of derate setting power and efficiency compare again, when if the product value of the efficiency that this performance number is corresponding with this performance number is still more than or equal to the product value of derate setting power and efficiency, continue the performance number of derate target power to diminish, until the performance number of derate target power and the product value of its efficiency are less than the product value of derate setting power and efficiency, now the grid-connected converter of bidirectional energy-storage carries out work by the performance number of the derate target power with now, when the initial gain value of derate target power and the product value of current efficiency are less than the product value of derate setting power and efficiency, the grid-connected converter of bidirectional energy-storage is also proceeded work with the performance number of derate target power now.
In the step of described data storage, temperature-derate setting power curve and efficiency-power curve are stored in storage chip or are integrated in control software with the form of correspondence table.
In described storage chip or control software, also store temperature protection threshold values and excess temperature derate threshold values.Described temperature detecting module is to be integrated in the temperature sensor of IGBT inside or temperature sampling circuit independently.
As shown in Figure 2, in the step that described Current Temperatures detects, after Current Temperatures has detected, software is compared Current Temperatures with temperature protection threshold values, if when Current Temperatures is more than or equal to temperature protection threshold values, and the grid-connected converter hard stop of bidirectional energy-storage; When if Current Temperatures is less than temperature protection threshold values, Current Temperatures and excess temperature derate threshold values are compared: if when Current Temperatures is less than excess temperature derate threshold values, exit excess temperature derate program; When if Current Temperatures is more than or equal to excess temperature derate threshold values, software starts to enter the step that current power detects.
The above is the preferred embodiment of the present invention; certainly can not limit with this interest field of the present invention; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or is equal to replacement, do not depart from the protection range of technical solution of the present invention.
Claims (5)
1. a software control method for the grid-connected converter excess temperature of bidirectional energy-storage power deratng, is characterized in that: comprise the following steps: A, data storage: temperature-derate setting power curve and efficiency-power curve are stored with the form of correspondence table, described efficiency-power curve is divided into the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode, in the grid-connected converter test process of bidirectional energy-storage, obtains the efficiency-power curve of charge mode and the efficiency-power curve of grid-connected discharge mode, B, Current Temperatures detect: utilize temperature detecting module to detect the Current Temperatures of the grid-connected converter of bidirectional energy-storage, C, current power detect: utilize power detection module to detect the current power of the grid-connected converter of bidirectional energy-storage, the current power value obtaining is the initial gain value of derate target power, D, current direct voltage detect: input direct voltage detection module obtains the current direct voltage of converter input, E, efficiency of selection-power curve: utilize the current DC voltage value detecting to determine that the mode of operation of the grid-connected converter of current bidirectional energy-storage is charge mode or grid-connected discharge mode, thereby select the efficiency-power curve of charge mode or the efficiency-power curve of grid-connected discharge mode, F, current efficiency are determined: according to the current power detecting, by the correspondence table of efficiency-power curve, can check in current efficiency corresponding to this current power, determining of G, derate setting power and efficiency thereof: show by the correspondence of temperature-derate setting power curve according to the Current Temperatures detecting, can check in the derate setting power that this Current Temperatures is corresponding, can check in corresponding efficiency by derate setting power, H, calculative determination derate target power: the product value of the initial gain value of derate target power and the product value of current efficiency and derate setting power and efficiency compares: when the initial gain value of derate target power and the product value of current efficiency are more than or equal to the product value of derate setting power and efficiency, performance number to derate target power is set, the performance number of derate target power is diminished, and pass through the correspondence table of efficiency-power curve according to the performance number of setting, can check in efficiency corresponding to this performance number, the product value of the efficiency that this performance number is corresponding with this performance number and the product value of derate setting power and efficiency compare again, when if the product value of the efficiency that this performance number is corresponding with this performance number is still more than or equal to the product value of derate setting power and efficiency, continue the performance number of derate target power to diminish, until the performance number of derate target power and the product value of its efficiency are less than the product value of derate setting power and efficiency, now the grid-connected converter of bidirectional energy-storage carries out work by the performance number of the derate target power with now, when the initial gain value of derate target power and the product value of current efficiency are less than the product value of derate setting power and efficiency, the grid-connected converter of bidirectional energy-storage is also proceeded work with the performance number of derate target power now.
2. the software control method of the grid-connected converter excess temperature of bidirectional energy-storage according to claim 1 power deratng, it is characterized in that: in the step of described data storage, temperature-derate setting power curve and efficiency-power curve are stored in storage chip or are integrated in control software with the form of correspondence table.
3. the software control method of the grid-connected converter excess temperature of bidirectional energy-storage according to claim 2 power deratng, is characterized in that: in described storage chip or control software, also store temperature protection threshold values and excess temperature derate threshold values.
4. the software control method of the grid-connected converter excess temperature of bidirectional energy-storage according to claim 3 power deratng, it is characterized in that: in the step that described Current Temperatures detects, after Current Temperatures has detected, software is compared Current Temperatures with temperature protection threshold values, when if Current Temperatures is more than or equal to temperature protection threshold values, the grid-connected converter hard stop of bidirectional energy-storage; When if Current Temperatures is less than temperature protection threshold values, Current Temperatures and excess temperature derate threshold values are compared: if when Current Temperatures is less than excess temperature derate threshold values, exit excess temperature derate program; When if Current Temperatures is more than or equal to excess temperature derate threshold values, software starts to enter the step that current power detects.
5. the software control method of the grid-connected converter excess temperature of bidirectional energy-storage according to claim 1 power deratng, is characterized in that: described temperature detecting module is to be integrated in the temperature sensor of IGBT inside or temperature sampling circuit independently.
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Cited By (3)
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| CN109038685A (en) * | 2018-08-17 | 2018-12-18 | 友达光电股份有限公司 | Renewable sources of energy management system |
| CN109845091A (en) * | 2016-10-19 | 2019-06-04 | 大众汽车有限公司 | The method of temperature drop volume for motor |
| CN111049410A (en) * | 2019-12-31 | 2020-04-21 | 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109845091A (en) * | 2016-10-19 | 2019-06-04 | 大众汽车有限公司 | The method of temperature drop volume for motor |
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| CN111049410A (en) * | 2019-12-31 | 2020-04-21 | 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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