30results about How to "Achieve maximum power output" patented technology

The present invention relates to the technical field of new energy power generation. A centralized-distributed hybrid new energy power generation system and a maximum power point tracking control method. The new energy power generation system consists of a plurality of distributed serially connected new energy power generation modules (100) and a centralized transformer (200). The new energy power generation module (100) consists of power generation equipment (101) and a direct current transformer (102). The maximum power point tracking control method comprises: the distributed power generation modules (100) and the centralized transformer (200) performing maximum power point tracking on the power generation equipment (101) at the same time, the new energy power generation modules (100) and the centralized transformer (200) performing maximum power point tracking on different parts of the output characteristic curve of the power generation module, respectively. The control method can enable the centralized transformer (200) and the power generation module (100) to work stably and reliably without communication present therebetween, the centralized transformer (200) automatically works in the optimal direct current bus voltage point, and the new energy power generation modules (100) at the same time enable each set of power generation equipment (101) to work at respective maximum power point, so that the system automatically implements the maximum power output.

The invention discloses an efficient insulation DC (direct-current) converter system in a photovoltaic power generation system. The DC converter enables large part of power to be transmitted to a busbar voltage through an efficient direct-current transformer (DCX), and small part of power is transmitted through a power compensation device (PVR), namely the output voltage of the power compensation device is the difference value of the voltage of a voltage compensation busbar of a controlled voltage source and the DSC output voltage; when the input voltage is higher, the power transmitted through the PVR is higher, and the system efficiency is low relatively, reversely, most part of power is transmitted through the DCX, and the system efficiency is higher relatively; the DCX is selected from an insulation-type converter without regulating the voltage, which plays effects of voltage conversion and electric insulation; the PVR is selected from the insulation-type converter which operates between two kinds of operation modes including steady voltage and MPPT (maximum power point tracking); and when the maximal output power of a solar battery is greater than the power required by load, the converter operates under the steady voltage mode, and reversely, the converter operates under the MPPT mode.

The invention provides an operating efficiency optimizing method of a small hydropower station unit. The method comprises the following steps: obtaining the historical operating data of a small hydropower station to create a efficiency feature curve of each small hydropower unit under different working conditions; acquiring the total generating low rate of the hydropower station, the current working water head, the upper limit and lower limit of power output of each unit and other data to create a target function based on the maximum operating efficiency of the small hydropower station; determining limiting conditions; optimizing and solving the target function by the standard particle swarm optimization; counting the optimal generating flow rate of each unit, the maximum power output of the small hydropower station unit and the maximum operating efficiency of the small hydropower station according to the limiting condition. With the adoption of operating efficiency optimizing method of the small hydropower station unit, the generating flow rate of the small hydropower station units can be reasonably distributed, thus the maximum power output of the small hydropower station can be realized, and the utilization rate of the water resource can be raised; in addition, the theoretical direction can be provided for the optimal operating of the existing small hydropower station units.

The invention belongs to the field of photovoltaic power generation, and specifically relates to an operation control method and system for a solar inverter of a vehicle-mounted photovoltaic system. The system includes a microprocessor module, a photovoltaic battery module, a primary converter module and a secondary converter module. Based on the discharge characteristics of the vehicle, the illumination characteristics of the vehicle-mounted photovoltaic system, and the operability of ordinary vehicles converted into solar-charged vehicles, the photovoltaic cells on the surface of the vehicle body that are subjected to different illumination conditions are grouped and controlled by a primary converter to reduce mutual interference and achieve a single The power output power of the first-stage converter is maximized, and an improved control algorithm suitable for the lighting conditions of the car is adopted to achieve the maximum power output power of the first-stage converter. The second-stage converter and its adaptive control algorithm are then used to achieve stable and maximized output power. The feature of this new type of controller is that it is easy to combine with the vehicle-mounted photovoltaic system, which effectively improves the active power of the photovoltaic system, and the power output is easy to control.

The invention relates to a maximum power output device of a solar cell panel. The maximum power output device comprises a BOOST circuit which is connected with the solar cell panel to provide the electric energy output by the solar cell panel for loading equipment and a power detection circuit which is used for collecting the working power of the loading equipment. The BOOST circuit and the power detection circuit are both connected with a control circuit. The control circuit can adjust the output power of the BOOST circuit. After the BOOST circuit increases the output power, and when it is detected that the working power of the loading equipment also rises by the power detection circuit, the control circuit continuously adjusts the output power of the BOOST circuit until the working power of the loading equipment is detected to be kept stable by the power detection circuit. The maximum power output device of the solar cell panel is compact in structure, capable of achieving the maximum power output of the solar cell panel, capable of greatly improving the utilization efficiency of the solar cell panel, capable of maximally achieving the purpose that the solar energy is utilized while the energy is generated, wide in application range, safe and reliable.

An embodiment of the invention discloses a method and a device for tracing a maximum power point and a power supply system. The method comprises the steps of: measuring at least two energy input modules of the same power supply system under different input conditions to obtain at least results of two power values; determining input conditions of the at least two energy input modules for the next moment through the comparison of the results of the two power values; and repeating the above steps until the maximum power point of the at least two energy input modules is traced; In the embodiment of the invention, the maximum power point can be traced in parallel among different energy modules, thereby adjusting times of the input conditions can be reduced; and measuring times of every energy input module under different input conditions can be reduced, thereby an overall response speed of the power supply system can be improved when the maximum power point is being traced; adjusting time can be reduced; a maximum power output of the power supply system can be realized rapidly; and the system generating capacity can be raised.

The invention discloses a charge control method of a low-power independent photovoltaic generating system, belonging to the technical field of photovoltaic power generation. In the method, the charge efficiency of the independent photovoltaic generating system is improved by fully utilizing the output characteristic of the photovoltaic battery array and the charge characteristic of the lead-acid storage battery, optimum matching of the photovoltaic battery array and the lead-acid storage battery is realized, meanwhile, the acceptable charge current of the lead-acid storage battery is strengthened through self discharge of the lead-acid storage battery and the lead-acid storage battery is ensured to completely absorb the electric energy output by the photovoltaic battery array during charging, thus achieving the aim of improving the charge efficiency of the independent photovoltaic generating system.

The invention discloses a longitudinal protection system for a distribution network including an inverter-type distributed power source, studies the grid-connected topology and working principle of IIDG, and analyzes the negative sequence current suppression control of the inverter in PQ and double dq The output characteristics of IIDG under the strategy; the suppression principle of the grid-connected isolation transformer for the zero-sequence fault component is introduced, and the working principle of the fault directional components installed at different positions is studied; The distributed area pilot protection method of the Agent unit can quickly complete the fault location and fault area isolation in the distribution network. The invention not only designs a fault directional element suitable for the IIDG distribution network, but also proposes a distributed area longitudinal protection strategy applied to the distribution network. It is of great significance to study relay protection strategies and directional elements suitable for smart distribution networks.

The invention discloses a photovoltaic module MPPT algorithm based on a global scanning and quasi-gradient disturbance observation method. The photovoltaic module MPPT algorithm comprises the following steps: positioning the global maximum power point of a photovoltaic module by using a programmable DC (direct current) electronic load; realizing maximum power output of the photovoltaic module through the quasi-gradient disturbance observation method; and finally, switching the scanning control policy by using constant power difference in the case of environmental sudden change. According to the embodiment of the photovoltaic module MPPT algorithm of the invention, the simulation result indicates that the method has relatively good dynamic performance and steady-state performance in any working condition.

The invention relates to a high voltage distributed laser energy supply unit. The unit has a plurality of photovoltaic cells which are mounted on a substrate. The plurality of photovoltaic cells are in series connection and are in separate connection to two leads through two connectors which are mounted on the substrate. A heat sink is provided with an optical fiber joint box thereon, and the optical fiber joint box covers the substrate. The optical fiber joint box is provided with a protection cover thereon. An upper end surface of the optical fiber joint box is evenly distributed with the lower end parts of optical fiber joints, and the lower end parts extend inside the optical fiber joint box and each optical fiber joint is at a relative position to one photovoltaic cell, and the upper end of each optical fiber joint is connected to an output end of a laser through an optical fiber. According to the invention, each laser can input an optical power of 1-100W, and the conversion rate of the photovoltaic cell can reach 50 %, and high voltage and high power can be output after combination, and different lasers can be selected, or the power of each laser in an array laser can be separately adjusted, such that the current output by each cell matches. The unit increases product reliability and achieves maximum power output of the system.

The invention discloses a maximum power output control method suitable for controlling a variable speed wind turbine group through concentrated variable flow. According to n wind turbines which are controlled by the same converter in a concentrated mode and are constant in rotating speed and different in input air speeds, the concentrated converter and overall wind turbine propeller pitch variation mechanisms are controlled in a coordinated mode, and therefore maximum power output of the wind turbine group is achieved. A control objective of the concentrated converter is that the speed of the wind turbine with the higher wind speed approaches to the optimal rotating speed as much as possible and a control objective of the propeller pitch variation mechanisms is that the highest wind energy utilization rate of the wind turbine with the lower wind speed is obtained at the unified rotating speed of the wind turbine group. The optimal calculation method is adopted and the frequency conversion alternating current bus frequency and the overall wind turbine propeller pitch angle which correspond to the maximized output power of the wind turbine group are worked out. The maximum power output control method is suitable for the variable speed wind turbine group controlled by an AC-DC converter in a high-voltage direct current power transmission system and an AC-AC frequency converter in a frequency division power transmission system.

The invention discloses an optimizing method and a system device for output power of a partially shielded photovoltaic power generation system. The system device comprises a photovoltaic battery plate, voltage and current acquisition circuits of the photovoltaic battery plate and a DSP (Digital Signal Processor) controller, wherein the controller is embedded with an APSOMPPT maximal power point tracking control algorithm program; the control output end of the controller is used for controlling a BOOST circuit through a PWM (Pulse Width Modulation) drive circuit; and the output of the BOOST circuit is connected with load. A tracking method comprises the steps as follows: fistly, obtaining open-circuit voltage of the photovoltaic battery plate; secondly, determining maximal output voltage of the photovoltaic battery plate according to the open-circuit voltage; thirdly, initializing a system and starting a timer; fourthly, when the set time is up, running the APSOMPPT maximal power point tracking control algorithm subprogram to iterate for multiple times; and lastly, taking global optimum of all the particles in the iterating process as voltage of a photovoltaic array for acting on the photovoltaic array. Therefore, the power optimization output of the photovoltaic power generation system is realized.

A wind power park and a method for operating a wind power park, the wind power park has a power park master (3) and a plurality of wind power devices (1). The master control (3) of the power generation park predetermines the power output of the wind power generation equipment (1). The wind park can be operated in a normal operating mode and in a power-reduced throttling mode. The park master ( 3 ) outputs a throttling signal to the wind power plants ( 1 ) for this purpose. According to the invention an individual power reduction P is determined for each participating wind power plant by 额定，i : For each wind power plant determine the available power P 可用（i） and reduce this available power by a certain reduction ΔP i ; through the optimized condition T with the same rise time 恢复，优化 = T 恢复，i The optimization method for wind power equipment to determine the reduction ΔP i ; and repeating until the optimization method achieves a predeterminable breakout criterion. A dynamic high-quality regulation behavior of the wind park is achieved not only at power reduction but also at power rise. By taking into account the individual power boost capabilities of the individual wind power plants, the wind power plants simultaneously achieve their respective maximum power outputs. Concomitant negative situations such as overshoot or slow asymptotic approximation are effectively avoided.