15 results about "Power optimizer" patented technology

The invention provides a power switch fault detection method, a photovoltaic power optimizer and a photovoltaic power generation system. The method comprises the steps that first electrical parameters of a circuit are collected, the circuit comprises a first power switch device and a second power switch device, the first power switch device is connected between the input end and the output end of the circuit in series, and the second power switch device is connected to the input end or the output end of the circuit in parallel; when the circuit works normally, the second power switch device is switched off when the first power switch device is switched on, and the second power switch device is switched on when the first power switch device is switched off; when the first electrical parameter meets a first condition, the duty ratio of the first power switch device is controlled to change; acquiring a second electrical parameter of the circuit in the duty ratio change process of the first power switch device; and determining a fault of the first power switching device or the second power switching device according to the change of the acquired value of the second electrical parameter.

The invention belongs to the technical field of power electronic control and system stability analysis in a new energy power generation system, and discloses a small signal modeling method for a module-level power optimizer. According to the method, a unified small signal model among a photovoltaic module, a DC / DC power converter, an inductor, a capacitor, a load and a controller is established; determining a transfer function relationship among output voltage disturbance, duty ratio disturbance and a control error signal; packaging a single-module model into a standard negative feedback control structure, and supporting Bode and Nyquist stability analysis; the method can be popularized to a multi-module series or parallel system, and system-level small signal stability evaluation is realized.

According to the photovoltaic cell-level dynamic reconfigurable energy generation method and system, each battery is independently packaged in a standard unit, and standardized integration of electrical, cooling and data interfaces is realized through a matrix type intelligent backboard, so that the battery pieces can be plugged on line like a blade server; a GaN-based chip-level power optimizer is arranged in each unit, a distributed energy routing network is formed through interconnection of a high-speed bus, and millisecond-level fault isolation and standby switching are achieved; according to the system, sheet-level electrical data, sensor data and inspection visual data are fused, battery sheet-level fault accurate positioning and service life prediction are achieved through AI diagnosis, and a robot is scheduled to execute non-stop hot plug replacement; battery piece-assembly-power station multi-time-scale cooperative control, inner ring millisecond-level MPPT, middle ring second-level coordinated reconstruction and outer ring minute-level global optimization are adopted. According to the architecture, a photovoltaic power station is converted from a static product into a dynamic ecological system capable of self-sensing and self-healing optimization, and the availability, the generating capacity and the full-life-cycle economy are remarkably improved.

1. The name of the design product: component monitoring power optimizer. 2. The use of the design product: used for optimizing the power output of photovoltaic components after the appearance of shadows, dust, dirt and stains on the surface of the components, and improving the power generation efficiency. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The application discloses a hot spot prevention photovoltaic module based on power optimizer input voltage intelligent control, which does not need to set a bypass diode in a junction box, and avoids the problem that when the junction box fails, the whole module is treated by pouring glue, which causes the difficulty in replacing the junction box, and the great waste caused by the replacement of the whole photovoltaic module; the control unit is provided with a threshold value for the input current of the power optimizer, and different input low voltage protection values of the power optimizer are set according to the comparison between the actual input current of the power optimizer and the threshold value, so that when the low irradiation and the risk of hot spot damage occur, the MPPT tracking range is larger, and the power generation efficiency is improved; when the high irradiation and the risk of hot spot damage occur, the higher input low voltage protection value is set, the reverse bias voltage value between the two ends of the cell piece subjected to the shading is limited, and the extreme hot spot temperature is far away, and the high temperature resistance requirement of the packaging material such as the back plate and the material cost are reduced.

The invention relates to a photovoltaic power optimizer networking system and a communication control method, the system comprises a gateway device and a plurality of photovoltaic devices, Bluetooth mesh modules are arranged in the gateway device and the photovoltaic devices, the gateway device and the plurality of photovoltaic devices form a Bluetooth mesh network through the Bluetooth mesh modules, the Bluetooth mesh network comprises a plurality of concentric circle communication groups, and the concentric circle communication groups are connected with the gateway device and the plurality of photovoltaic devices. At least two pieces of photovoltaic equipment are arranged on each concentric circle communication group; the photovoltaic equipment comprises a photovoltaic module and a power optimizer connected with the photovoltaic module, a Bluetooth mesh module is arranged in the power optimizer, and the power optimizer is used for adjusting the output power of the photovoltaic module, obtaining state data of the photovoltaic module and sending the state data to the gateway equipment through a Bluetooth mesh network. According to the invention, the Bluetooth private mesh ad hoc network can be realized, the security and reliability are higher, the difficulty of equipment installation and configuration can be reduced, the difficulty of network distribution can be reduced, and the traffic cost of server connection can be reduced.

The application belongs to the technical field of photovoltaic power generation, and particularly relates to a power optimizer escape circuit applied to a group string type photovoltaic system, which comprises: a fault detection unit for monitoring the working state of the power optimizer and outputting a control signal; a channel switching unit responding to the control signal output by the fault detection unit; a main power channel containing a power regulation module, used for transmitting and regulating the output power of a photovoltaic module when the power optimizer is normally working; and an escape channel used for transmitting the output power of the photovoltaic module when the power optimizer is faulty. The application constructs an intelligent switching channel through double MOSFET switches, seamlessly switches to a passive bypass path when the optimizer is faulty, guarantees the continuous power generation of the module, completely avoids the high-voltage electric shock risk through the hardware-level direct current channel, automatically restores the operation of the main power channel after the fault is eliminated, does not need manual intervention, and finally realizes the minimization of power generation loss, the maximization of system safety, and the fundamental reduction of operation and maintenance cost.

The invention discloses a photovoltaic module level power generation system. The system comprises a plurality of photovoltaic strings, a string stage power optimizer, a convergence module and an inversion module, the photovoltaic group string comprises at least two component-level power optimizers; wherein the input end of each component-level power optimizer is coupled with a photovoltaic component; the output ends of the component-level power optimizers are connected in series and then output; part of the photovoltaic group strings are coupled with the inversion module through the group string stage power optimizers which are arranged in one-to-one correspondence with the photovoltaic group strings; and part of the photovoltaic group strings are coupled with the inversion module through the common convergence module. The photovoltaic module-level power generation system can give consideration to the power generation efficiency, the cost and the installation flexibility.

The invention discloses an intelligent agent-based S + C + L hybrid amplification link optimization configuration method, and relates to the technical field of ultra-wideband optical fiber communication. According to the method, an operation and maintenance agent system energized by a large language model is constructed, an open source LLM is taken as a core inference engine, and an autonomous operation and maintenance closed loop is formed by combining a knowledge base, a tool library and a southbound interface. The knowledge base covers the optical transmission principle and operation and maintenance rules, and the tool library encapsulates special capabilities of a QoT estimation model, a power optimizer, an amplifier configuration calculator and the like. The system receives a natural language request through an arrangement and execution layer, completes intention recognition and task decomposition, calls a tool library as required to carry out calculation simulation, and translates a result into a device-level executable command. On the basis, on the basis of telemetering feedback, on-line tuning is carried out according to transmitting power pre-emphasis and dynamic amplitude limiting of wave bands and channels, power balance is kept, and cooperative operation of QoT estimation, parameter configuration, fault monitoring and re-optimization tasks is achieved.

The present application relates to the field of photovoltaic power generation, and specifically provides a three-dimensional photovoltaic array and a power generation control method thereof, the array comprising eastward, westward, southeastward and southwestward photovoltaic panels, and adopting a three-dimensional arrangement form of opposite and front sides; each photovoltaic panel is configured with a component-level power optimizer and a backside light sensor, and both are electrically connected with a four-direction MPPT cooperative controller. The controller cooperatively adjusts the output power of each photovoltaic panel according to the current time period and the equivalent front-side irradiance converted from the backside irradiance of each photovoltaic panel. The present application improves the utilization rate of land and irradiance, realizes fine regulation and control of photovoltaic panel power, avoids irradiance acquisition error, achieves global MPPT cooperative optimization of the array, effectively reduces power mismatching problem, adapts the output power of each photovoltaic panel to its own light and the global demand of the array, and improves the overall power generation efficiency and power output stability of the photovoltaic array.

The present invention provides a metal substrate heat dissipation structure and a photovoltaic power optimizer. The metal substrate heat dissipation structure includes a printed circuit board PCB, a multi-layer metal plate, and a power device. The multi-layer metal plate includes a first metal layer, a second metal layer, a first insulation layer, and a second insulation layer. The power device is disposed on the first metal layer, to implement power interconnection between power devices. The PCB is electrically connected to the first metal layer, to enable a control device on the PCB to control the power device on the first metal layer. The first metal layer is electrically connected to the second metal layer, to implement an electromagnetic shielding function. The first insulation layer and the second insulation layer respectively implement functional insulation effect and reinforced insulation effect. The metal substrate heat dissipation structure fully utilizes a strong heat dissipation feature of a metal substrate, effectively simplifies the heat dissipation structure, reduces production difficulty and material costs of the heat dissipation structure, reduces interface thermal resistance, and improves heat dissipation efficiency.

The application discloses a photovoltaic device and power generation system based on dual working mode ASIC chip control safety. The power optimizer in the photovoltaic system has two working modes of MPPT maximum power tracking and safety. In the MPPT maximum power tracking working mode of the ASIC chip, the output voltage and current of a photovoltaic module are collected, then the output power of the photovoltaic module is calculated through an analog multiplier, and a maximum power tracking unit adjusts the duty cycle to realize tracking of the maximum power of the photovoltaic module. Meanwhile, the ASIC chip mode control circuit realizes that when an emergency fault such as a short circuit between photovoltaic strings in the power generation system or a short circuit of each photovoltaic string connected to a bus of a photovoltaic inverter occurs, all the power optimizers in the power generation system in front of the short circuit fault are switched to the safety working mode, all the photovoltaic power generation units connected to the power optimizers stop outputting voltage and power, and system safety is realized.

A common reference signal is used by a plurality of serially-connected power optimizers to manage a plurality of photovoltaic panels. It is determined whether an individual voltage output exceeds an individual limit. If so, a corresponding photovoltaic panel in the plurality of photovoltaic panels is adjusted to reduce the individual voltage output and the combined voltage output, where the combined voltage output is based at least in part on (a) the individual voltage output and (2) at least one other individual voltage output associated with another power optimizer. It is determined whether the combined voltage output relative to the common reference signal exceeds a maximum offset. If so, the corresponding photovoltaic panel in the plurality of photovoltaic panels is adjusted to reduce the individual voltage output and the combined voltage output.

The invention relates to a photovoltaic power optimizer, a photovoltaic power generation system and a mode switching control method. The photovoltaic power optimizer is used for being connected with a photovoltaic module to adjust the output power of the photovoltaic module. The photovoltaic power optimizer comprises a driving module and a control module. The driving module comprises a power optimization chip, a through switch circuit, a buck circuit and a power supply output interface; the buck circuit sequentially comprises an upper switch tube, a power inductor and a lower switch tube, the power inductor and the lower switch tube are both connected with the output interface, the upper switch tube comprises a first switch tube and a second switch tube which are connected in parallel, and the lower switch tube comprises a third switch tube and a fourth switch tube which are connected in parallel; the control module comprises a sampling circuit and a processor chip. The upper switch tube and the lower switch tube of the buck circuit both adopt a double-switch-tube parallel design, a heat source is successfully shared, the heat dissipation efficiency is improved, and the photovoltaic power optimizer can intelligently and automatically switch modes by collecting and judging the voltage, current and temperature of the assembly.

A photovoltaic (PV) module (1) comprising a positive terminal (5), a negative terminal (6), and at least two sub-modules. Each of the at least two sub-modules (10a-c) comprises x parallel-connected sub-strings (13), wherein each of the x parallel-connected sub-strings (13) comprises y series-connected sub-cells (16), wherein the y series-connected sub-cells (16) are arranged in an array. The PV module (1) further comprises a back conductive sheet having a first connection pattern arranged for connecting the x parallel-connected sub-strings (13) of each of the at least two sub-modules (10a-c), wherein each of the at least two sub-modules (10a-c) is provided with a power optimizer circuit (21a-c), and the output of the power optimizer circuits (21a-c) are connected in series between the positive terminal (5) and the negative terminal (6).