CN115085330A - Wisdom electric wire netting numerical control solar drive control system - Google Patents
Wisdom electric wire netting numerical control solar drive control system Download PDFInfo
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- CN115085330A CN115085330A CN202210817310.7A CN202210817310A CN115085330A CN 115085330 A CN115085330 A CN 115085330A CN 202210817310 A CN202210817310 A CN 202210817310A CN 115085330 A CN115085330 A CN 115085330A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 66
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 19
- 230000002441 reversible effect Effects 0.000 claims description 13
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 9
- 230000005669 field effect Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a smart power grid numerical control solar drive control system which comprises a controller, a photovoltaic panel, a storage battery, a direct current load, a bidirectional power directional switch, a synchronous buck-boost converter and a buck-boost driving module, wherein the synchronous buck-boost converter is respectively connected with the photovoltaic panel, the direct current load, the storage battery and the buck-boost driving module, the controller is respectively connected with the bidirectional power directional switch and the buck-boost driving module, an operational amplifier is further connected in a connecting circuit of the synchronous buck-boost converter and the storage battery, the output end of the operational amplifier is connected to the controller, and the bidirectional power directional switch is further respectively connected with the photovoltaic panel and the direct current load. Compared with the prior art, the invention combines two power levels in the prior art into one bidirectional power level, thereby realizing the optimization of the performance, the cost and the size of the solar drive control system.
Description
Technical Field
The invention relates to the technical field of solar charging and discharging, in particular to a smart power grid numerical control solar drive control system.
Background
Solar-driven applications, such as standalone solar street lamps, require the following system functions: a system for charging the lead-acid battery from the solar panel and a system for driving the street lamp from the battery. In conventional solutions, establishing these capabilities requires the use of two power supply phases: one power stage is used to charge the battery and the other power stage is used to operate as a CC-CV driver. The two power stages may be independently controlled by separate discrete circuits or using a single digital controller.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a smart grid digital control solar drive control system.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a wisdom electric wire netting numerical control solar drive control system, includes controller, photovoltaic board, battery and direct current load, the system still includes two-way power directional switch, synchronous buck-boost converter and buck-boost drive module, photovoltaic board, direct current load, battery and buck-boost drive module are connected respectively to synchronous buck-boost converter, two-way power directional switch and buck-boost drive module are connected respectively to the controller, still be connected with operational amplifier in the interconnecting link of synchronous buck-boost converter and battery, this operational amplifier's output inserts the controller, two-way power directional switch still connects photovoltaic board and direct current load respectively.
Further, when the system is in a charging working condition, the controller drives the bidirectional power directional switch to be connected with the photovoltaic panel and disconnected with the direct-current load; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage reducing mode; and the photovoltaic panel charges the storage battery through the synchronous buck-boost converter.
Further, when the synchronous buck-boost converter is in the synchronous buck mode, the photovoltaic panel is driven to work within the interval range of the maximum power point, and the storage battery is charged.
Further, when the storage battery is fully charged, the controller still drives the photovoltaic panel to perform floating charging on the storage battery.
Further, the secondary battery is in a fully charged state when the secondary battery is held at a constant voltage equal to a maximum charging voltage specified for the secondary battery; the floating charging specifically comprises: the photovoltaic panel continuously charges the battery and keeps the battery constantly below the maximum charging voltage.
Further, when the system is in a power supply working condition, the controller drives the bidirectional power directional switch to be connected with a direct current load and disconnected with the photovoltaic panel; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage boosting mode; and the storage battery supplies power to the direct-current load through the synchronous buck-boost converter.
Further, when the synchronous buck-boost converter is in a synchronous boost mode, a CC-CV mode is adopted, the controller uses an internal timer to generate required pulse width modulation, and the ADC takes the load voltage and the load current as feedback to control the PWM duty ratio so as to realize CC-CV mode control.
Further, the bidirectional power directional switch comprises a first field effect transistor and a second field effect transistor, the first field effect transistor is respectively connected with the controller and the photovoltaic panel, and the second field effect transistor is respectively connected with the controller and the direct current load.
Further, when the controller detects that the battery terminals of the storage battery are reversely connected, the controller controls the bidirectional power directional switch to be reversely biased.
Further, boost-buck driving module includes a gate driver, an auxiliary power supply buck converter and a linear regulator, the input of the auxiliary power supply buck converter is connected into the connecting line of synchronous boost-buck converter and photovoltaic panel and the connecting line of synchronous boost-buck converter and direct current load respectively, the output of the auxiliary power supply buck converter is connected respectively linear regulator and gate driver, the controller is still connected the gate driver.
Compared with the prior art, the invention has the following advantages:
(1) the invention realizes the integration of two systems by arranging the bidirectional power directional switch: the direct current-direct current synchronous boost converter is used for charging the lead-acid battery, the DC-DC synchronous boost converter is used for driving the CC-CV direct current load, the discharging working condition and the charging working condition are respectively realized, two power levels in the prior art are combined into a bidirectional power level, and the optimization of the solar drive control system in the aspects of performance, cost and size is realized.
(2) The invention realizes the maximum power point tracker and the four-stage battery charging algorithm in the charging working condition, is easy to customize according to the requirement of a terminal system, and can improve the charging power and the charging efficiency.
(3) The invention also realizes the reverse polarity protection of the battery. This function protects the system from failure when the battery is accidentally reverse connected at the battery terminals. If the battery is accidentally connected with reverse priority, the body diodes of the two MOSFETs will automatically be reverse biased. This protection can isolate the battery from the rest of the system.
(4) The synchronous buck-boost converter consists of a single DC-DC power level, can be used as a synchronous buck converter or a synchronous boost converter, and realizes bidirectional power flow between a direct-current power supply and an energy storage system.
Drawings
Fig. 1 is a schematic structural diagram of a smart grid digital control solar drive control system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
Example 1
As shown in fig. 1, this embodiment provides a wisdom electric wire netting numerical control solar drive control system, which comprises a controller, the photovoltaic board, the battery, direct current load, two-way power directional switch, synchronous buck-boost converter and buck-boost drive module, synchronous buck-boost converter connects the photovoltaic board respectively, direct current load, battery and buck-boost drive module, two-way power directional switch and buck-boost drive module are connected respectively to the controller, still be connected with operational amplifier in the interconnecting link of synchronous buck-boost converter and battery, this operational amplifier's output access controller, two-way power directional switch still connects photovoltaic board and direct current load respectively.
The bidirectional power directional switch comprises a first field effect tube and a second field effect tube, wherein the first field effect tube is respectively connected with the controller and the photovoltaic panel, and the second field effect tube is respectively connected with the controller and the direct current load.
Through the switching control of the bidirectional power directional switch, the system can realize the charging working condition and the discharging working condition. The following is a detailed description.
For bidirectional power directional switches, bidirectional power directional switches are an integration of two systems: one for charging the lead-acid battery and the other for driving the CC-CV DC load.
For the bi-directional power switch direction, when the system is configured for synchronous buck, the power flow in the system is towards the battery. When the system is configured for synchronous boosting, the power flow may reverse. When the power flow is reversed (i.e., the power flow is sourced from the battery), the user must prevent the system from dumping power into the panel, so two MOSFETs are used as switches to direct the power flow. The purpose of these two switches is to transfer power from the panel or channel to the load depending on the state of the system. When the system is in the battery charging state, MOSFET1 is on, MOSFET2 is off, and power flow from the panel to the battery occurs. If the MOSFET1 is turned off, power flow cannot move in the reverse direction (i.e., from the battery to the load) because the internal diode of the MOSFET blocks flow. When the system is in the CC-CV driver state, MOSFET2 is open and MOSFET1 is closed. Power now flows from the battery to the load. The MOSFET switches are controlled by the MCU device. The MCU controls the state of the switches to select either battery charge or CC-CV driver based on panel voltage conditions and battery voltage conditions (sensed by the ADC).
As a preferred embodiment, to realize reverse polarity protection of the storage battery, when the controller detects that the battery terminals of the storage battery are reversely connected, the controller controls the bidirectional power directional switch to perform reverse bias.
This function, equivalently, protects the system from failure when the battery is accidentally reverse connected at the battery terminals. If the battery is accidentally connected with reverse priority, the body diodes of the two MOSFETs will automatically be reverse biased. This protection can isolate the battery from the rest of the system.
For the charging working condition, when the system is in the charging working condition, the controller drives the bidirectional power directional switch to be communicated with the photovoltaic panel and disconnected with the direct-current load; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage reducing mode; the photovoltaic panel charges the storage battery through the synchronous buck-boost converter.
In a preferred embodiment, in order to obtain the maximum charging power from the solar panel, when the synchronous buck-boost converter is in the synchronous buck mode, the photovoltaic panel is driven to work within the interval range of the maximum power point, and the storage battery is charged.
In a preferred embodiment, to keep the battery charged at the maximum capacity, the controller drives the photovoltaic panel to float charge the battery when the battery is fully charged.
The storage battery is in a fully charged state when the storage battery is held at a constant voltage equal to a maximum charging voltage specified for the storage battery; the floating charging specifically comprises: the photovoltaic panel continuously charges the battery and keeps the battery constantly below the maximum charging voltage.
The above embodiments of the charging condition may be arbitrarily combined to obtain a better embodiment, and a detailed description will be given below of an optimal embodiment of the charging condition.
The controller adopts MCU, and realizes battery charging, operates the power station in synchronous step-down configuration. The system is capable of charging 12V lead acid batteries from Photovoltaic (PV) panels with an open circuit voltage of 15V to 44V or a direct current power supply. The MCU device enables maximum power to be extracted from the photovoltaic panel and the lead-acid battery to be charged using four-phase charging.
The power output from the solar panel depends on parameters such as the illumination received by the panel voltage, the panel temperature, etc. As the influencing conditions change, the power output will also change continuously. The user can obtain the maximum power from the solar panel by operating the panel near the maximum power point; however, there are two difficulties with doing so: 1. a method 2 of connecting batteries or loads at different operating voltages is provided the maximum power point is automatically identified because it varies with environmental conditions rather than being verified. Connecting a solar panel that reaches a maximum power point of 17V to a 12V lead acid battery forces the panel to operate at 12V, which reduces the amount of power that can be extracted from the panel. From this situation, the user can speculate that a dc-dc converter can draw more power from the solar panel because it forces the solar panel to operate near the maximum power point and deliver power to the 12V lead acid battery (impedance matching). In the batch charging phase, the battery is charged at a constant current frequency of C/10 to C/5 until the battery reaches a predetermined maximum charging voltage. The value of the maximum charging voltage is determined in accordance with the type specific to the lead-acid battery. For example, for a 12V battery, the maximum charging voltage may be between 14.2V and 14.8V. During the batch charging phase, the battery is charged up to 80% of its full capacity. During the absorption phase, the battery is maintained at a constant voltage equal to the maximum charge voltage specified for the battery. The charging current required to maintain the battery at this maximum charging voltage slowly drops until a minimum value is reached. At this point, the battery is assumed to have been charged to its full capacity. When the battery is fully charged, it will still be charged by floating charge. Float charging is required to compensate for self-discharge of lead acid batteries. Float charging is accomplished by maintaining the battery at a constant voltage below the maximum charging voltage of the battery. Float charging keeps the battery fully charged, avoiding damage to the battery by keeping it at the maximum charging voltage. This measure increases the lifetime of the battery while keeping the battery charged at maximum capacity. By operating the synchronous buck stage in the diode emulation mode under low load conditions, system efficiency may be improved. Under low load conditions, the average inductor current is typically low. Because the average current is low, the instantaneous inductor current may become negative by increasing the rms current and decreasing the converter efficiency (if operating in synchronous buck mode). In diode simulation, the system enters discontinuous conduction mode and rms current can be reduced here by providing better efficiency. When the battery current drops below 1A, the synchronous buck power stage begins to operate in diode emulation mode. When the current increases above 1.2A, the system switches back to operate in synchronous buck mode.
For the power supply working condition, when the system is in the power supply working condition, the controller drives the bidirectional power directional switch to be communicated with the direct current load and disconnected with the photovoltaic panel; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage boosting mode; the storage battery supplies power to the direct current load through the synchronous buck-boost converter.
In a preferred embodiment, when the synchronous buck-boost converter is in the synchronous boost mode to realize stable charging of the direct current load, the CC-CV mode is adopted, the controller uses an internal timer to generate the required pulse width modulation, and the ADC uses the load voltage and the load current as feedback to control the PWM duty ratio, so as to realize the CC-CV mode control.
In this embodiment, when no power is transmitted from the solar panel, the power stage is configured as a synchronous boost converter by the MCU device. As a synchronous boost converter, the system can drive a dc load up to 45V and 1A current, and at an efficiency level of approximately 92%. The system is a CC-CV limited power supply with configurable CC and CV limits. The system is particularly suitable for dc loads, such as LED strings, which have to be driven in CC mode. The control component of the synchronous boost converter is implemented using an MCU. The MCU uses an internal timer to generate the required Pulse Width Modulation (PWM) and uses the load voltage and load current as feedback through the ADC. The obtained load voltage and load current information is then used to control the PWM duty cycle to achieve CC-CV control of the converter.
As an optional implementation manner, the buck-boost driving module includes a gate driver, an auxiliary power buck converter and a linear regulator, an input end of the auxiliary power buck converter is respectively connected to a connection line of the synchronous buck-boost converter and the photovoltaic panel and a connection line of the synchronous buck-boost converter and the dc load, an output end of the auxiliary power buck converter is respectively connected to the linear regulator and the gate driver, and the controller is further connected to the gate driver.
Selection of components: the losses at the switching MOSFET can be seen as the sum of the conduction losses and the switching losses. The switching losses depend on the input capacitance of the MOSFET and the gate drive circuit. The gate drive circuit controls the off-time and the off-time of the MOSFET. To reduce switching losses, the switching and turn-off times of MOSFETs must be minimized. Minimizing this time requires a high current gate driver. LM5109A is a high voltage half bridge gate driver with a 1A peak gate current. The device is capable of operating at voltage rails of up to 90V and is well suited for semi-bridging and synchronous load applications. The high grid driving current reduces the switching time of the MOSFET, effectively reduces the loss of the MOSFET and improves the efficiency of the system. The OPA170 is a low noise precision amplifier with a wide operating voltage range, high bandwidth, and good Common Mode Rejection Ratio (CMRR) for measuring battery charging current in a differential amplifier configuration where the common mode input voltage can be very high.
In this embodiment, the MCU internal ADC is configured to sample five analog signals, specifically, a battery voltage, a battery current, a panel voltage, a load voltage, and a load current. The internal ADC is used to effectively sample these analog signals. Using this internal DMA allows the controller to perform other operations while the ADC samples these signals and stores the results in the controller memory. The bi-directional power stage operates at a switching frequency of 100kHz when operating as a synchronous boost and at a switching frequency of 350kHz when operating as a synchronous boost. The power stage also requires two complementary PWM outputs with sufficient time between them to function properly. The whole system has the following states: battery charging, CC-CV driver, standby, and in addition, there are some low power states (LPM3, LPM4, and LPM4) to conserve the system's standby power. An intermediate state, called the load transient state, is used to move from the CC-CV driver state to the battery state of charge and vice versa. This intermediate state helps to place the system in a safe mode of operation during the transition. The state machine executes as part of the main loop of the program. Under normal operating conditions, the state machine executes every 10.4 ms. When in the low power mode LPM3, the main loop is executed every two seconds to reduce power consumption.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a wisdom electric wire netting numerical control solar drive control system, includes controller, photovoltaic board, battery and direct current load, its characterized in that, the system still includes two-way power directional switch, synchronous buck-boost converter and buck-boost drive module, photovoltaic board, direct current load, battery and buck-boost drive module are connected respectively to synchronous buck-boost converter, two-way power directional switch and buck-boost drive module are connected respectively to the controller, still be connected with operational amplifier in the interconnecting link of synchronous buck-boost converter and battery, this operational amplifier's output inserts the controller, two-way power directional switch still connects photovoltaic board and direct current load respectively.
2. The system of claim 1, wherein the controller drives the bi-directional power switch to connect the photovoltaic panel and disconnect the dc load when the system is in a charging mode; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage reducing mode; and the photovoltaic panel charges the storage battery through the synchronous buck-boost converter.
3. The system of claim 2, wherein the synchronous buck-boost converter drives the photovoltaic panel to operate within a range of a maximum power point when in a synchronous buck mode, and charges the battery.
4. The system of claim 2, wherein the controller drives the photovoltaic panel to float and charge the battery when the battery is fully charged.
5. The system of claim 4, wherein the battery is fully charged when the battery is maintained at a constant voltage equal to a maximum charge voltage specified for the battery; the floating charging specifically comprises: the photovoltaic panel continuously charges the battery and keeps the battery constantly below the maximum charging voltage.
6. The intelligent power grid numerical control solar drive control system as claimed in claim 1, wherein when the system is in a power supply condition, the controller drives the bidirectional power directional switch to connect a direct current load and disconnect a photovoltaic panel; the controller also drives the voltage boosting and reducing driving module to control the synchronous voltage boosting and reducing converter to be in a synchronous voltage boosting mode; and the storage battery supplies power to the direct-current load through the synchronous buck-boost converter.
7. The system of claim 6, wherein the synchronous buck-boost converter is in a CC-CV mode when in a synchronous boost mode, the controller uses an internal timer to generate the required pulse width modulation, and the ADC uses the load voltage and the load current as feedback to control the PWM duty cycle, so as to realize the CC-CV mode control.
8. The system of claim 1, wherein the bi-directional power switch comprises a first fet and a second fet, the first fet is connected to the controller and the photovoltaic panel, and the second fet is connected to the controller and the dc load.
9. The system of claim 1, wherein the controller controls the bi-directional power switch to reverse bias when the controller detects a reverse connection of the battery terminals of the battery.
10. The system according to claim 1, wherein the buck-boost driving module comprises a gate driver, an auxiliary power buck converter and a linear regulator, an input end of the auxiliary power buck converter is respectively connected to a connection line of the synchronous buck-boost converter and the photovoltaic panel and a connection line of the synchronous buck-boost converter and the dc load, an output end of the auxiliary power buck converter is respectively connected to the linear regulator and the gate driver, and the controller is further connected to the gate driver.
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| CN202210817310.7A CN115085330A (en) | 2022-07-12 | 2022-07-12 | Wisdom electric wire netting numerical control solar drive control system |
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| CN202210817310.7A CN115085330A (en) | 2022-07-12 | 2022-07-12 | Wisdom electric wire netting numerical control solar drive control system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202957634U (en) * | 2012-12-10 | 2013-05-29 | 温州大学 | Maximum power point (MPPT) tracing and load protection device for photovoltaic cell |
| CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
| CN209472554U (en) * | 2018-12-18 | 2019-10-08 | 哈尔滨理工大学 | Photovoltaic power generation and the bidirectional power converters of energy storage |
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- 2022-07-12 CN CN202210817310.7A patent/CN115085330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202957634U (en) * | 2012-12-10 | 2013-05-29 | 温州大学 | Maximum power point (MPPT) tracing and load protection device for photovoltaic cell |
| CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
| CN209472554U (en) * | 2018-12-18 | 2019-10-08 | 哈尔滨理工大学 | Photovoltaic power generation and the bidirectional power converters of energy storage |
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