5results about How to "Improve voltage distribution" patented technology

The invention relates to the technical field of power systems, and discloses a half-wavelength controllable tuning method under the background of a dual-carbon and novel power system. Comprising the following steps: system evaluation and demand analysis: collecting power grid information and fusing dual carbon and novel power system demands to determine a tuning target and key parameters; designing a half-wavelength tuning strategy, determining tuning parameters by using a particle swarm optimization algorithm, formulating the strategy, and performing simulation optimization; selecting and configuring half-wavelength controllable equipment, evaluating performance indexes, selecting equipment, and reasonably configuring, installing and debugging; system integration and communication network construction: integrating equipment and constructing a reliable communication network to ensure information transmission; tuning implementation and monitoring are carried out, a control system is developed to send instructions, data are collected and analyzed to evaluate performance, and optimization is fed back according to results. According to the invention, the stability and adaptability of the power grid are enhanced, the intelligent development is promoted, the resource configuration and structure are optimized, the safety and sustainable development are guaranteed, and the challenges of dual-carbon and novel power systems can be effectively handled.

The invention provides a micro-grid energy management method based on a hierarchical genetic algorithm. The micro-grid energy management method comprises the steps that whether a gas turbine of a nearby micro-grid is activated or an energy storage battery of the micro-grid is utilized is determined according to the power supply condition; whether unused micro-grid resources exist or not is checked, and gas turbines of other micro-grids continue to be used; if the micro-grid still has insufficient power supply after using the gas turbine, entering a standby process, and using energy storage batteries of other micro-grids; energy storage batteries of other micro-grids are continuously used according to requirements until all power requirements are met; repeatedly executing each micro-grid until the power supply and demand balance of all micro-grids are processed; and updating the current time to the next measurement moment, and circularly executing in a 24-hour operation period. According to the method, two layers of optimization models are established, the upper layer aims at reducing power loss, improving voltage distribution and smoothing power fluctuation of power distribution network operation, and the lower layer aims at reducing MG operation cost and pollution emission.

The application discloses to belong to the technical field of power system planning and optimization, and particularly relates to an optimization method for distributed power generation and energy storage joint planning in an active distribution network, comprising: a double-layer robust planning model considering new energy output uncertainty is established, SOT is used to discretize the probability distribution of wind power and photovoltaic into a probability sequence and calculate the expected output, and an uncertainty processing mechanism is embedded to guide DG and energy storage capacity configuration; a DG and energy storage joint optimization model based on a double-layer planning framework is constructed, the upper layer optimizes site selection and capacity determination with the minimum annual total cost as the target, the lower layer optimizes energy storage scheduling with the minimum daily operation cost as the target, and planning and operation are coordinated; an improved BPSO monitoring population fitness variance based on chaos optimization is proposed, and Tent mapping chaos disturbance is dynamically introduced to realize efficient solution and global optimization of the model. On the PG&E 69 bus system, line loss can be reduced, voltage distribution can be improved, and new energy consumption capacity can be significantly improved.

The utility model belongs to the field of high-voltage electric appliances, and particularly relates to an upper-lower double-gap metal oxide arrester special for photovoltaic power generation. The metal oxide resistor comprises a composite jacket, and a first metal oxide resistor unit, a second metal oxide resistor unit, a third metal oxide resistor unit and a fourth metal oxide resistor unit which are sequentially arranged in the composite jacket from top to bottom, the upper end of the composite outer sleeve is provided with an upper gap alloy grading ring, and the lower end of the composite outer sleeve is provided with a lower gap alloy grading ring. According to the utility model, through the upper and lower double-gap combined structure, the multi-unit metal oxide resistor disc group absorbs overvoltage, and the filter capacitor absorbs high-frequency impact interference and harmonic waves, the lightning overvoltage and operation overvoltage generated in a power generation system can be absorbed, and the surge protection circuit is sensitive in starting, low in residual voltage value, strong in impact resistance, small in standby loss and long in service life.

The present invention relates to a GIS lightning arrester, comprising a tank body, a first flange, a second flange, a core assembly and an insulator, wherein the core assembly is installed in the tank body, the first flange and the second flange are respectively installed at two ends of the tank body, a bypass is provided on the side wall of the tank body, and the insulator is installed on the bypass; a first connecting conductor and a second connecting conductor are connected to the core assembly, the first connecting conductor is arranged in the bypass and connected to the insulator, the second connecting conductor is arranged close to the first flange and a first shielding cover is installed between the first flange; the core assembly adopts a multi-column resistor parallel structure, and each column resistor includes a plurality of resistors connected in series. During the normal operation of the GIS lightning arrester of the present invention, the system voltage is applied to the lightning arrester, and the charge rate of the lightning arrester can be controlled to 85%, thereby ensuring the safety of the long-term operation of the lightning arrester. When an overvoltage occurs in the system, the insulation of the electrical equipment is protected from being damaged by the number of resistors in series and parallel of the core assembly.