CN205584121U - Voltage compensation method increase type photovoltaic conflux case - Google Patents
Voltage compensation method increase type photovoltaic conflux case Download PDFInfo
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- CN205584121U CN205584121U CN201620300891.7U CN201620300891U CN205584121U CN 205584121 U CN205584121 U CN 205584121U CN 201620300891 U CN201620300891 U CN 201620300891U CN 205584121 U CN205584121 U CN 205584121U
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- 238000003491 array Methods 0.000 claims description 19
- 230000033228 biological regulation Effects 0.000 claims description 11
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- 238000010248 power generation Methods 0.000 abstract description 5
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- 238000013083 solar photovoltaic technology Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model discloses a voltage compensation method increase type photovoltaic conflux case, it relates to the solar photovoltaic power generation technology field. DC DC compensating power supply generator output voltage's anode lead -out wire is gone here and there and is connect to collection flow box's positive electrode busbar bus after anti - diode is prevented to income no. 1, DC DC compensating power supply generator output voltage's the negative terminal lead -out wire and the input of PWM pulse width pressure regulating type switch matrix board are connected, DC met energy storage capacitor between DC compensating power supply generator output voltage's anode and the negative terminal, the positive electrode busbar bus is connected with the anodal inlet wire of each group battery cluster, the multichannel burden voltage output line that PWM pulse width pressure regulating type switch matrix board was drawn forth connects to the high -tension fuse and on preventing the node between the anti - diode, PWM pulse width pressure regulating type switch matrix board is connected with the control panel that is connected with a plurality of current sample sensors. The utility model discloses it is easy and simple to handle, with low costs, improve photovoltaic power generation efficiency, economy has realized effectively that the maximize of photovoltaic power generation efficiency promotes.
Description
Technical field
The utility model relates to solar photovoltaic technology field, be specifically related to voltage compensation method Synergistic type photovoltaic combiner box.
Background technology
In the most a large amount of photovoltaic power station components used, and in the international photovoltaic products fair that Shanghai in 2015 is held, the most do not find that photovoltaic combiner box has great breakthrough in design and fabrication technology, even being known as state-of-the art Intelligent photovoltaic header box, the most all the function not occurring promoting photovoltaic battery pack for power generation efficiency.nullExisting almost all of photovoltaic generation header box the most simply plays switching and collects the direct current energy that photovoltaic cell group string is sent，And the electric energy ten several photovoltaic group string sent by header box concentrated and is sent on reversal busbar，It is sent to inversion main frame again，Header box structure is essentially all by photovoltaic group string input terminal、High-tension fuse、Counnter attack diode (some header box saves)、Primary cut-out、High direct voltage lightning protection device、Conflux busbar and the parts such as binding post and cabinet housing composition，The compensation function of the combination of these elements not line voltage distribution，So the loss in efficiency caused lifting photovoltaic generation because terminal voltage is uneven does not has any effect，And due to the present position of cell panel each in each photovoltaic group string and angle、Surface is dirty or difference by situations such as shadow occlusion，The different of photovoltaic group string output end voltage will be caused，According to the principle that parallel circuit both end voltage is essentially equal，Consequence the most in parallel is: its output electric current of set of cells string that output voltage is low is bound to be output the high set of cells string loop of voltage to inhibiting，Its output electric current just becomes the least，Have a strong impact on the up to standard of generating efficiency.
Set of cells terminal voltage imbalance is caused to the phenomenon that photovoltaic power station power generation loss in efficiency is serious, the solution of some foreign projects teacher is: install the power optimization device with boosting and constant voltage effect on monoblock battery plate, or common photovoltaic junction box changed into the Intelligent wiring box with power optimization, the terminal voltage making every piece of photovoltaic battery panel output all rises to a fixing value, so that the terminal voltage of each set of cells string is of substantially equal, but convert boosted output voltages by DC-DC, original output electric current will necessarily be made to diminish, because relative to an output specified, voltage and electric current are multiplication relationship, improve voltage and will reduce electric current, if wanting motor current, then can reduce output voltage.The most domestic also have some companies to have the Intelligent wiring box of power optimization function in research and development, although this rosette can produce certain effect to promoting generating efficiency, but every piece of battery component all must be transformed, therefore quantities is big, Intelligent wiring box consumption is big, and single cost is also suitable height, so the popularization of this scheme has bigger limitation, at present in our the domestic purchase desire being also relatively difficult to evoke client.
In order to solve the problems referred to above, design a kind of novel voltage compensation method Synergistic type photovoltaic combiner box or necessary.
Utility model content
For not enough present on prior art, this utility model purpose is to be to provide a kind of voltage compensation method Synergistic type photovoltaic combiner box, simple in construction, reasonable in design, easy and simple to handle, low cost, the approach of overall generating efficiency that improve photovoltaic plant has started solution brand-new in, the maximization achieving photovoltaic generation usefulness cost-effectively promotes, practical, use economic and practical, easy to spread.
nullTo achieve these goals，This utility model is to realize by the following technical solutions: voltage compensation method Synergistic type photovoltaic combiner box，Including panel、DC-DC compensates power generators、PWM pulse wide voltage-regulation type switch arrays strake、Energy-storage capacitor、Counnter attack diode、Compensate power supply counnter attack diode、Current sample sensor、Primary cut-out、Lightning protection component、Inlet wire terminal block、High-tension fuse、Outgoing line busbar terminal block and casing，The anode lead-out wire of the input voltage that DC-DC compensates power generators connects high-tension fuse to positive pole busbar bus，The negative terminal lead-out wire of the input voltage that DC-DC compensates power generators is connected with cathode bus bar bus，DC-DC compensates the anode lead-out wire of power generators output voltage and connects compensation power supply counnter attack diode to positive pole busbar bus，DC-DC compensates the negative terminal lead-out wire of power generators output voltage and is connected with the input of PWM pulse wide voltage-regulation type switch arrays strake，It is connected to energy-storage capacitor between anode and the negative terminal of DC-DC compensation power generators output voltage，Positive pole busbar bus is connected with each set of cells string positive pole inlet wire，It is respectively connected with a road high-tension fuse on each set of cells string positive pole inlet wire、The series circuit of counnter attack diode，PWM pulse wide voltage-regulation type switch arrays strake is arranged between compensating voltage source and every road cell plate group string，The multichannel negative voltage output lead that PWM pulse wide voltage-regulation type switch arrays strake is drawn is connected on the node between high-tension fuse and counnter attack diode，PWM pulse wide voltage-regulation type switch arrays strake is connected with panel，Multiple current sample sensor it is connected on panel，It is connected to lightning protection component in positive pole busbar bus，Between positive pole busbar bus and cathode bus bar bus, primary cut-out is installed；Described panel, DC-DC compensate power generators, PWM pulse wide voltage-regulation type switch arrays strake, energy-storage capacitor, counnter attack diode, compensate power supply counnter attack diode, current sample sensor, primary cut-out, lightning protection component, high-tension fuse are installed in casing, positive pole busbar bus, cathode bus bar bus are separately fixed on the inlet wire terminal block of casing port, outgoing line busbar terminal block.
As preferably, described panel is made up of current sample array module, CPU scale operation control module, Regulation Control signal output module, and current sample array module, CPU scale operation control module, Regulation Control signal output module are sequentially connected with.
As preferably, described current sample sensor is serially connected on the negative pole inlet wire of the set of cells string that each road enters header box, current sample sensor uses Hall type DC current sensor, and the output line of each Hall type DC current sensor is connected to panel.
As preferably, described casing is provided with the emergent switching switch used as common header box, prevents Synergistic type header box at voltage compensation synergistic function just in case common header box still can be worked as when losing efficacy to be used.
As preferably, described Synergistic type header box has remote monitoring data communication function, can be accessed the data function such as the electric current of each set of cells string and voltage of header boxs by 485 data telecommunication line long-distance Log server, and remote control signal can be received make it switch between potentiation header box function and common header box function.
As preferably, utilize the dynamic voltage compensation technology of inlet wire branch, cover on all photovoltaic cell group string inlet wires entering Synergistic type header box, and the addition of line build-out voltage whether and is compensated the size of voltage, after being the basis detecting to this group string electric current, through singlechip control panel, this current signal is being controlled adjustment after the comparison operation of the average loop current signal in each branch road, and whole adjustment is being a progressive formation repeatedly regulated.
As preferably, for preventing from producing harmful mistake tonality vibration between the detecting of line current and the regulation compensating voltage, the output height compensating voltage be have employed PID regulation algorithm and be controlled.
The beneficial effects of the utility model: substantially overcome within occurring two pieces in single set of cells string cell panel generating effect bad and cause the defeated problem not going out electric current, after the voltage increase parts voltage compensation to this group string, the output electric current making it reaches the meansigma methods of each group of string loop, so that the electric energy that in this group string, tens of cell panels cannot export originally is all excavated；Use Synergistic type header box, may also reach up materials and most save (every piece of cell panel need not be compensated), transform more convenient (being also applied for newly-built photovoltaic plant), as long as putting into a potentiation header box, just can solve the generation optimization problem of hundreds of pieces of cell panels, the maximization achieving photovoltaic generation usefulness cost-effectively promotes simultaneously.
Accompanying drawing explanation
This utility model is described in detail below in conjunction with the accompanying drawings with detailed description of the invention；
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with detailed description of the invention, this utility model is expanded on further.
nullWith reference to Fig. 1，This detailed description of the invention is by the following technical solutions: voltage compensation method Synergistic type photovoltaic combiner box，Including panel 1、DC-DC compensates power generators 2、PWM pulse wide voltage-regulation type switch arrays strake 3、Energy-storage capacitor 4、Counnter attack diode 5、Compensate power supply counnter attack diode 6、Current sample sensor 7、Primary cut-out 8、Lightning protection component 9、Inlet wire terminal block 10、High-tension fuse 11、Outgoing line busbar terminal block 12 and casing 13，Panel 1、DC-DC compensates power generators 2、PWM pulse wide voltage-regulation type switch arrays strake 3、Energy-storage capacitor 4、Counnter attack diode 5、Compensate power supply counnter attack diode 6、Current sample sensor 7、Primary cut-out 8、Lightning protection component 9、High-tension fuse 11 is installed in casing 13，The inlet wire terminal block 10 of casing 13 port、Positive pole busbar bus 14 it is separately installed with on outgoing line busbar terminal block 12、Cathode bus bar bus 15，The anode lead-out wire of the input voltage that DC-DC compensates power generators 2 connects high-tension fuse 11 to positive pole busbar bus 14，The negative terminal lead-out wire of the input voltage that DC-DC compensates power generators 2 is connected with cathode bus bar bus 15，DC-DC compensates the anode lead-out wire of power generators 2 output voltage and connects compensation power supply counnter attack diode 6 to positive pole busbar bus 14，DC-DC compensates the negative terminal lead-out wire of power generators 2 output voltage and is connected with the input of PWM pulse wide voltage-regulation type switch arrays strake 3，It is connected to energy-storage capacitor 4 between anode and the negative terminal of DC-DC compensation power generators 2 output voltage，Positive pole busbar bus 14 is connected with each set of cells string positive pole inlet wire，It is respectively connected with a road high-tension fuse 11 on each set of cells string positive pole inlet wire、The series circuit of counnter attack diode 5，The multichannel negative voltage output lead that PWM pulse wide voltage-regulation type switch arrays strake 3 is drawn is connected on the node between high-tension fuse 11 and counnter attack diode 5，PWM pulse wide voltage-regulation type switch arrays strake 3 is connected with panel 1，Multiple current sample sensor 7 it is connected on panel 1，It is connected to lightning protection component 9 in positive pole busbar bus 14，Between positive pole busbar bus 14 and cathode bus bar bus 15, primary cut-out 8 is installed.
It should be noted that, described panel 1 is made up of current sample array module 101, CPU scale operation control module 102, Regulation Control signal output module 103, and current sample array module 101, CPU scale operation control module 102, Regulation Control signal output module 103 are sequentially connected with.
It should be noted that, described current sample sensor 7 is serially connected on the negative pole inlet wire of the set of cells string that each road enters header box, current sample sensor 7 uses Hall type DC current sensor, the output line of each Hall type DC current sensor to be connected to panel 1.
Additionally, be to prevent from producing harmful mistake tonality vibration between the detecting of line current and the regulation compensating voltage, it is controlled so the output height compensating voltage be have employed PID regulation algorithm.
This detailed description of the invention just in case still working as common header box when losing efficacy and using, is provided with the emergent switching switch used as common header box for preventing Synergistic type header box at voltage compensation synergistic function in header box circuit；Synergistic type header box has remote monitoring data communication function simultaneously, can be accessed the data function such as the electric current of each set of cells string and voltage of header box by wireless digital transmission communication module or 485 data telecommunication line long-distance Log server, and remote control signal can be received make it switch between potentiation header box function and common header box function.
The design philosophy of this detailed description of the invention is exactly to use to enter each road set of cells string to carry out current sense on the circuit of Synergistic type header box, after intelligence mainboard carries out comprehensive computing to all sampled signals, the loop that each electric current is less than normal is carried out suitable voltage compensation, so that the output voltage loop lifting that each electric current is on the low side, make output electric current close or equal with the comprehensive average current in each loop, release with the most economical feasible technical products with easy construction, promote the whole efficiency of photovoltaic power station system, terminal of collecting at set of cells string realizes centralized MPPT MPPT maximum power point tracking and Optimization Compensation.
Utilize the dynamic voltage compensation technology of inlet wire branch, cover on all photovoltaic cell group string inlet wires entering Synergistic type header box, and the addition of line build-out voltage whether and is compensated the size of voltage, after being the basis detecting to this group string electric current, through singlechip control panel, this current signal is being controlled adjustment after the comparison operation of the average loop current signal in each branch road, and whole adjustment is being a progressive formation repeatedly regulated.
This detailed description of the invention employs one group of isolated form DC-DC and compensates power generators 2, from the high-pressure side of the output busbar about 600 volts of header box, obtain a part of electric energy, compensate power generators 2 blood pressure lowering through DC-DC and become the low-voltage electric energy of about 60 volts to be stored in a jumbo energy-storage capacitor 4；Between compensating voltage source (comprising electrolysis condenser) and every road cell plate group string, one block of PWM pulse wide voltage-regulation type switch arrays strake 3 is installed, the effect of this plate is exactly the compensation voltage-regulation gate of a multichannel, and the shutter opening and closing on each road and size, then controlled by panel 1, assume when a certain wire-end voltage on the low side and cause system need to its conveying compensate voltage time, it is negative polarity owing to being sent to the compensation voltage of the contact of high-tension fuse 11 and counnter attack diode 5 positive pole, it is cut off making original counnter attack diode 5 because of reverse-biased, set of cells string input voltage originally just can only with compensate voltage superimposed after be transported to again on bus busbar, and the result of voltage superposition allows for its terminal voltage and gets a promotion, input current increases the most therewith.
When the angled problem of cell panel in certain or multiple photovoltaic group string, surface are dirty or by shadow occlusion, this photovoltaic group string output end voltage can be less than other photovoltaic group string output end voltages, and now system needs its conveying is compensated voltage.This device is on the inlet wire of the set of cells string of each road entrance header box, all concatenate into a Hall type DC current sensor, at any time the input current on every road is sampled, then upload in panel 1, signal is after the Integrated comparative and computing of this plate CPU Program, obtain the control signal compensating voltage swing needed for the set of cells string of every road, then the number of pressing is sent to PWM pulse wide voltage-regulation type switch arrays strake 3 accordingly, finally compensate the electric energy in voltage pond (jumbo energy-storage capacitor) after the regulation of each switch door, in the loop that each road inlet wire current that is added to being distributed according to need is less than normal, each road inlet wire current is made gradually to rise to the level of grand mean electric current；When the electric current in loop higher in average current or close to average current time, system automatic decision in software, this type of loop is not carried out voltage compensation.
This detailed description of the invention can play the function of autobalance each photovoltaic group string output end voltage, solves and causes the situation of photovoltaic efficiency degradation because of the output electric current of the group string suppression low output voltage group string of high output voltage.And, according to the trend that can introduce Intelligent wiring box after photovoltaic electrification component in a large number, its internal MPPT function can make the output electric current of each cell panel reach maximum coupling automatically, but terminal voltage equilibrium problem during its group string generating still can not solve, so compensation and the equilibrium function of output end voltage have to be increased at header box node, Intelligent wiring box just can be made really to have given play to the purpose improving photovoltaic efficiency.This voltage compensation method Synergistic type photovoltaic combiner box is such as individually used for not introducing the photovoltaic plant of Intelligent wiring box, also can promote the generating efficiency of photovoltaic cell group string significantly.
nullThis detailed description of the invention adds inlet wire current and voltage on the basis of original technology、The isoparametric detection of lightning protection device performance indications，And test data the function such as upload，Have employed the method directly on Centroid (header box), the loop that each photovoltaic group string output end voltage is on the low side being carried out voltage compensation lifting，So that the output electric current of terminal voltage set of cells string on the low side gets a promotion，The output electric current of Shi Ge road set of cells string is the most roughly equal，Thus the generated energy being originally suppressed because terminal voltage is on the low side is excavated to greatest extent，Improve the overall generating efficiency of photovoltaic plant，Several piece cell panel generating effect bad the caused line termination voltage problem not going out electric current on the low side and defeated can be overcome completely，It is to solve current domestic contrast shortage to improve the best means that photovoltaic generation causes generating efficiency to lose in a large number because terminal voltage is uneven，May also reach up materials and save most，Every piece of cell panel need not be compensated，Transform more convenient (being also applied for newly-built photovoltaic plant)，As long as putting into a potentiation header box，Just can solve the generation optimization problem of hundreds of pieces of cell panels simultaneously，The maximization achieving photovoltaic generation usefulness cost-effectively promotes，It is substantially reduced popularization cost，Simple to operate，There is wide market application foreground.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description, principle of the present utility model is simply described; on the premise of without departing from this utility model spirit and scope; this utility model also has various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (6)
- null1. voltage compensation method Synergistic type photovoltaic combiner box，It is characterized in that，Including panel (1)、DC-DC compensates power generators (2)、PWM pulse wide voltage-regulation type switch arrays strake (3)、Energy-storage capacitor (4)、Counnter attack diode (5)、Compensate power supply counnter attack diode (6)、Current sample sensor (7)、Primary cut-out (8)、Lightning protection component (9) and high-tension fuse (11)，The anode lead-out wire of the input voltage that DC-DC compensates power generators (2) connects high-tension fuse (11) to positive pole busbar bus (14)，The negative terminal lead-out wire of the input voltage that DC-DC compensates power generators (2) is connected with cathode bus bar bus (15)，DC-DC compensates the anode lead-out wire of power generators (2) output voltage and connects compensation power supply counnter attack diode (6) to positive pole busbar bus (14)，DC-DC compensates the negative terminal lead-out wire of power generators (2) output voltage and is connected with the input of PWM pulse wide voltage-regulation type switch arrays strake (3)，It is connected to energy-storage capacitor (4) between anode and the negative terminal of DC-DC compensation power generators (2) output voltage，Positive pole busbar bus (14) is connected with each set of cells string positive pole inlet wire，It is respectively connected with a road high-tension fuse (11) on each set of cells string positive pole inlet wire、The series circuit of counnter attack diode (5)，The multichannel negative voltage output lead that PWM pulse wide voltage-regulation type switch arrays strake (3) draws is connected on the node between high-tension fuse (11) and counnter attack diode (5)，PWM pulse wide voltage-regulation type switch arrays strake (3) is connected with panel (1)，Multiple current sample sensor (7) it is connected on panel (1)，Lightning protection component (9) it is connected on positive pole busbar bus (14)，Primary cut-out (8) is installed between positive pole busbar bus (14) and cathode bus bar bus (15).
- Voltage compensation method Synergistic type photovoltaic combiner box the most according to claim 1, it is characterized in that, described panel (1), DC-DC compensates power generators (2), PWM pulse wide voltage-regulation type switch arrays strake (3), energy-storage capacitor (4), counnter attack diode (5), compensate power supply counnter attack diode (6), current sample sensor (7), primary cut-out (8), lightning protection component (9), high-tension fuse (11) is installed in casing (13), positive pole busbar bus (14), cathode bus bar bus (15) is separately fixed at the inlet wire terminal block (10) of casing (13) port, on outgoing line busbar terminal block (12).
- Voltage compensation method Synergistic type photovoltaic combiner box the most according to claim 1, it is characterized in that, described panel (1) is made up of current sample array module (101), CPU scale operation control module (102), Regulation Control signal output module (103), and current sample array module (101), CPU scale operation control module (102), Regulation Control signal output module (103) are sequentially connected with.
- Voltage compensation method Synergistic type photovoltaic combiner box the most according to claim 1, it is characterised in that described PWM pulse wide voltage-regulation type switch arrays strake (3) is arranged between compensating voltage source and every road cell plate group string.
- Voltage compensation method Synergistic type photovoltaic combiner box the most according to claim 1, it is characterized in that, described current sample sensor (7) is serially connected on the negative pole inlet wire of the set of cells string that each road enters header box, current sample sensor (7) uses Hall type DC current sensor, and the output line of each Hall type DC current sensor is connected to panel (1).
- Voltage compensation method Synergistic type photovoltaic combiner box the most according to claim 2, it is characterized in that, described casing (13) is provided with and prevents Synergistic type photovoltaic combiner box from still can work as the emergent switching switch that common header box uses when voltage compensation synergistic function lost efficacy.
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| CN201620300891.7U CN205584121U (en) | 2016-04-12 | 2016-04-12 | Voltage compensation method increase type photovoltaic conflux case |
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| CN201620300891.7U CN205584121U (en) | 2016-04-12 | 2016-04-12 | Voltage compensation method increase type photovoltaic conflux case |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941261A (en) * | 2017-04-10 | 2017-07-11 | 上海质卫环保科技有限公司 | Intelligent junction box with anti-PID functions |
| CN107482672A (en) * | 2017-07-20 | 2017-12-15 | 苏州艾特博斯智能设备有限公司 | A kind of distributed photovoltaic component optimization method and device based on tuning algorithm |
| CN110198073A (en) * | 2018-02-24 | 2019-09-03 | 丰郅(上海)新能源科技有限公司 | Energy supply system and the method for energy management |
| CN110896227A (en) * | 2018-09-12 | 2020-03-20 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| CN114142580A (en) * | 2021-10-29 | 2022-03-04 | 漳州科华电气技术有限公司 | Charging control method and control terminal for super capacitor of wind power pitch system |
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2016
- 2016-04-12 CN CN201620300891.7U patent/CN205584121U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941261A (en) * | 2017-04-10 | 2017-07-11 | 上海质卫环保科技有限公司 | Intelligent junction box with anti-PID functions |
| CN107482672A (en) * | 2017-07-20 | 2017-12-15 | 苏州艾特博斯智能设备有限公司 | A kind of distributed photovoltaic component optimization method and device based on tuning algorithm |
| CN110198073A (en) * | 2018-02-24 | 2019-09-03 | 丰郅(上海)新能源科技有限公司 | Energy supply system and the method for energy management |
| CN110896227A (en) * | 2018-09-12 | 2020-03-20 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| CN110896227B (en) * | 2018-09-12 | 2021-11-02 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| CN114142580A (en) * | 2021-10-29 | 2022-03-04 | 漳州科华电气技术有限公司 | Charging control method and control terminal for super capacitor of wind power pitch system |
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