32results about How to "Fast load response" patented technology

There are provided a switching power supply device performing a stable operation with fast response, a semiconductor integrated circuit device, and a power supply device.A capacitor is provided between the output side of an inductor and a ground potential. A first power MOSFET supplies an electric current from an input voltage to the input side of the inductor. A second power MOSFET turned on when the first power MOSFET is off allows the input side of the inductor to be of a predetermined potential. A first feedback signal corresponding to an output voltage obtained from the output side of the inductor and a second feedback signal corresponding to an electric current flowed to the first power MOSFET are used to form a PWM signal. The first power MOSFET has plural cells of a vertical type MOS-construction. The number of cells is 1 / N. A detection MOSFET in which the gains and the drains are shared over the same semiconductor substrate with the first power MOSFET is provided to form a second feedback signal.

The invention provides a photovoltaic power station and hydropower station combined operation system. The system is established through the method which comprises the steps that first, the output feature of photovoltaic power generation is measured and analyzed; then the output feature of photovoltaic power generation and the power generation feature of a hydropower station are combined, and according to the water balance theory, the influence on a hydropower station downstream power station from established combined operation system is analyzed; the influence on a power grid from the system is analyzed again; the scale of a photovoltaic power station connected into the hydropower station is computed again, and the operation situation of a water-turbine generator set of the hydropower station in the combined operation system is analyzed; and finally the combined operation system is formed. The invention further provides an operation method of the combined operation system. By setting a control method that the hydropower station is used for compensating the photovoltaic power station, an AGC and AVC control method and a water balance testing method, the combined operation system operates. The advantages of high adjusting capacity and high adjusting speed of the hydropower station are used, the photovoltaic power station with high volatility is subjected to compensation, and the combined operation system can provide power for a power grid stably.

A series regulator includes, for example, first and second operational amplifiers, for driving a first transistor for a heavy load and a second transistor for a light load respectively, and an amplifier control circuit. The amplifier control circuit controls the first and second operational amplifiers such that, in a light load region, a first output current passing through the first transistor has a zero value and a second output current passing through the second transistor covers the entire output current passing through a load, and such that, in a heavy load region, the second output current has a zero value (or a fixed value lower than an amplifier switching threshold value) and the first output current covers the entire output current (or a difference left by subtracting the second output current from the output current).

A method for improving a specific proportion load efficiency of a power supply and an apparatus thereof. The method includes the following steps: detecting the load capacity of the power supply (101); selecting at least one sub-power-circuit from preset power circuits to perform the power regulation of an input power according to the load capacity and predetermined rules (102); outputting the regulated power to a load (103). In the method, according to the detected load capacity, the selected corresponding sub-power-circuits in the preset power circuits are switched to regulate the input power so as to supply the load with a required power. The power loss of the power supply is reduced, and the output efficiency of the power supply is improved. Moreover, switching may further be performed among the sub-power-circuits according to a preset return difference value, thus a power supply system risk and a load power-fail risk are lowered due to frequent switching among the sub-power-circuits.

The embodiment of the invention discloses a method and device for optimization control over primary air of a coal-fired generator set. By adoption of the method and device, the primary air ratios of all coal pulverizers are lowered, throttling loss of hot primary air is reduced, and output of primary air fans is reduced. The method for optimization control over the primary air of the coal-fired generator set comprises the steps that S1, highest values of the minimum air-coal ratio for raw coal grinding, the minimum air-coal ratio for pulverized coal preheating and the minimum manual air-coal ratio are selected, and the number of a coal pulverizer with the maximum coal feeding ratio and the corresponding coal feeding ratio are determined; S2, primary air ratios A required for grinding and preheating of the coal pulverizer with the maximum coal feeding ratio are calculated through the selected minimum air-coal ratios and the coal feeding ratio corresponding to the coal pulverizer with the maximum coal feeding ratio, a primary air ratio B for pulverized coal conveying is determined, the highest values of the primary air ratios A and the primary air ratio B are selected, and the minimum primary air ratio required for operation of the coal pulverizer with the maximum coal feeding ratio is obtained; and S3, the output of the primary air fans is adjusted until the total primary air ratio of the coal pulverizer with the maximum coal feeding ratio meets requirements of the minimum primary air ratio.

The invention provides an integrated water and heat management system and control strategy for fuel cell electric vehicles. The electronic water pump is sequentially connected with the first three-way control valve, the cooling port of the motor, the first-stage intercooler, the electronic heater, the deionizer, The cooling port of the fuel cell, the electronic thermostat, the secondary intercooler and the water tank form a closed-loop communication; the electronic thermostat selectively connects the outlet of the fuel cell cooling port to the inlet of the secondary intercooler according to the temperature of its inlet. Or the inlet of the electronic water pump is connected; the water heat controller obtains the detection values ​​of the first temperature sensor, the second temperature sensor and the third temperature sensor, and the water heat controller controls the electronic water pump, the electronic fan, the electronic heater, the electronic cooling device, the first three-way control valve and the second three-way control valve. The invention has the advantages of large power output, fast response speed of variable load, high work efficiency, strong battery life and the like.

The invention discloses a sampling method of an envelope tracking power supply. In the method, the envelope signal outputs a first voltage V1 after passing through a linear amplifier, and the first voltage V1 includes a DC voltage V11 and an AC voltage. The sampling control module passes through a low-pass The filter collects the DC voltage V11 in the first voltage V1 and directly collects the second voltage V2. The second voltage V2 is an output voltage including DC and AC voltages. When the DC voltage V11 is greater than the second voltage V2 and the hysteresis of the comparator When returning to the sum of h, the sampling control module generates the first signal, so that the upper tube M1 of the switching power supply is turned on, the lower tube M2 is turned off, and supplies power to the load. When the DC voltage V11 is less than the second voltage V2 and the hysteresis h of the comparator When there is a difference, the sampling control module generates a second signal, so that the upper transistor M1 of the switching power supply is turned off, and the lower transistor M2 is turned on, so that the second voltage V2 is equal to the first voltage V1.

The invention discloses a nuclear energy coupled chemical energy power generation system and method based on a two-circuit boiler, comprising: the boiler is connected to a gas-molten salt heat exchanger to form a boiler primary circuit, and the gas-molten salt heat exchanger is connected to a cold molten salt The tank and the hot molten salt tank are connected respectively, and the cold molten salt tank and the hot molten salt tank are respectively connected to the molten salt superheated steam heat exchanger to form a boiler secondary circuit; the steam outlet of the nuclear island is divided into two paths, one of which is connected to A steam turbine with a base load is connected to the molten salt superheated steam heat exchanger; the steam outlet of the molten salt superheated steam heat exchanger is connected to a coupling steam turbine; the base load steam turbine drives the first generator to generate electricity, and the coupling steam turbine drives The second generator generates electricity; the invention makes full use of the characteristics of high specific heat capacity of special gas and heat storage of molten salt, which can shift the process time. While improving cycle thermal efficiency and power generation efficiency, it improves the safety of the coupling system operation and the protection against work changes. adaptability to the situation.

The invention discloses a nuclear energy and solar energy coupling based power generation system and method. The nuclear energy and solar energy coupling based power generation system comprises a solar heat absorber; the solar heat absorber is connected with a cold molten salt tank and a hot molten salt tank; the cold molten salt tank and the hot molten salt tank are connected with a molten salt-superheated steam heat exchanger; a steam outlet of a nuclear island is divided into two paths, one path is connected with a steam turbine with a basic load, and the other path is connected with the molten salt-superheated steam heat exchanger; the steam outlet of the molten salt-superheated steam heat exchanger is connected with a steam turbine for coupling; the steam turbine with the basic load drives a first power generator to generate power; and the steam turbine for coupling drives a second power generator to generate the power. The nuclear energy and solar energy coupling based power generation system provided by the invention fully utilizes the characteristics of convenience in nuclear fuel transportation, larger energy density and the like and the characteristic that a temperature of 800 DEG C or above can be generated after solar light gathering, relatively low temperature steam (with the temperature being 300 DEG C or below generally), going out from the nuclear island, is heated to 400-700 DEG C, the circulation thermal efficiency is greatly improved, and thus the power generation efficiency is greatly improved.