55results about How to "Improve voltage distribution" patented technology

There is provided a high frequency semiconductor switch for improving insertion loss characteristics and harmonic characteristics by providing good voltage distribution in a gate wiring. The field effect transistor includes a source wiring electrically connected to a source region formed on a substrate and extending unidirectionally; a drain wiring electrically connected to a drain region formed on the substrate and extending in parallel with the source wiring; a gate having a parallel portion extending between the source wiring and the drain wiring in approximately parallel with the source wiring and the drain wiring; a gate wiring applying voltage to the gate; and a gate via electrically connecting the gate to the gate wiring, the parallel portion including two ends and formed with a path applying voltage to each of the two ends from the gate via.

A barrier-film forming apparatus that forms a barrier film on an inner face of a container having a concave or convex portion as a processing target, including: a dielectric member having a cavity sized to enclose the container, an external electrode covering an outer circumference of the dielectric member, an exhaust unit installed on an end face of the external electrode on a side where a mouth of the container is located, with an insulating member interposed therebetween, and depressurizing inside of the container through an exhaust pipe, an internal electrode inserted from a side of the exhaust pipe and also serving as a gas blowout unit that blows out medium gas for generating a barrier film into the container, and an electric-field applying unit that applies an electric field for generating exhaust between the external electrode and a ground electrode.

The invention discloses a multi-end flexible direct current power transmission system level coordinate control device which comprises a data collecting module, a data processing module, a control function processing module, a communication management module and a redundancy control module. The data collecting module is responsible for process data collection and data collection of analog quantities such as state signals, voltage and current and generates input data needed by the control function processing module. The control function processing module comprises an active control module, a reactive control module, a direct-current voltage control module, a VF control module and the like, finally, reference value signals of voltage, active power, reactive power, frequency and the like of a converter station are generated, the reference value signals are sent to a converter station unit controller through the communication management module to complete a system control target. The multi-end flexible direct current power transmission system level coordinate control device can conduct emergent operation control which includes conversion of the system operation mode and the control mode, emergent running stopping and locking control under some faults, fault switching of a redundant system, resetting operation control after alarming or protecting actions and the like, and the reliability of integrated design of the system is improved.

The present application relates to a method and device for optimizing configuration of microgrid energy storage in consideration of full life cycle cost. The microgrid energy storage optimization configuration method considering the life cycle cost includes: obtaining the data of the energy storage system to be configured to obtain the target data; obtaining a pre-established energy storage optimization model, the energy storage optimization model includes the outer layer optimization model and An inner layer optimization model; according to the target data, the optimal solution of the energy storage optimization model is solved by a genetic algorithm and a simulated annealing algorithm to obtain an optimal configuration result, and the optimal configuration result includes at least the rated power, the rated capacity and the economical operating power; configuring the energy storage system to be configured according to the optimized configuration result. The method provided in this application can minimize the cost and maximize the revenue of the energy storage system in the whole cycle.

A calculation method for parallel compensation of distribution network capacitors based on partial trees, which obtains distribution network information, initially calculates the initial compensation scheme for parallel capacitors, judges whether the partial trees need to be divided again, divides the corresponding partial trees, and determines each partial tree separately Compensation point, judge whether the local tree needs to be optimized again, further optimize the compensation point, compare the benefit-to-investment ratio and make a cyclical judgment until the output of each compensation node number and their compensation capacity under the condition of the maximum benefit-to-investment ratio. The invention can provide capacitor parallel compensation location and compensation capacity of radial distribution network, more effectively reduce the line loss rate in the operation process of the distribution network, improve the voltage distribution of the distribution network operation, and achieve the purpose of improving the economic benefits and power supply of the distribution network operation. The role of reliability has high practical value.

The invention relates to a double-layer voltage optimization method for integrating low-speed distributed wind power into distribution network, comprising the following steps: 1) constructing a double-layer voltage optimization model according to a model of a low-speed wind turbine generator system and a SVC; 2) In the upper layer model, the multi-objective programming problem of low-speed wind turbine location is solved, and the optimal type and location of low-speed wind turbine are obtained. After the location of low-speed wind turbine is selected, Q-V-curve method is adopted to determine the optimal access location of SVC; 3) The optimal type, access position and optimal access position of SVC of low-speed wind turbine in the upper layer model are transferred to the lower layer model,and the reactive power control method of coordinated voltage regulation between DFIG and SVC based on fuzzy logic is established, so that the parallel voltage of wind turbine can be raised to the range of continuous operation. Compared with the prior art, the invention has the advantages of considering low wind speed, load fluctuation and user behavior characteristics of the load of the distribution network, improving the overall voltage distribution of the distribution network and the like.

The invention provides a voltage bilevel optimization droop control method for a distributed photovoltaic cluster, which belongs to the technical field of power system operation and control. The method includes steps of: establishing a distributed photovoltaic cluster droop curve optimization layer and a distributed photovoltaic local reactive power control layer respectively, two levels executingsimultaneously and separately, and the distributed photovoltaic cluster droop curve optimization layer periodically sending the optimization result to the distributed photovoltaic local reactive power control layer to enable the latter to adjust the reactive power output in real time according to the fluctuation of the system state, respond to the system's reactive power regulation requirements to the greatest extent, solve the contradiction between optimization calculation, cycle communication and real-time control, and reduce the photovoltaic off-net risk. The method fully utilizes the reactive power adjustment capability of distributed photovoltaic power generation nodes, reduces the calculation burden of the system, and reduces the operation and maintenance cost.