6results about How to "Power balance" patented technology

The invention relates to the technical field of power grid dispatching, in particular to an active-reactive collaborative optimization dispatching method for a power distribution network. Acquiring voltage, active power and power grid line data at the uploading moment of the user side and various monitoring data of the transformer substation in a preset time period; because the user side data and the transformer substation side data are in space-time asymmetry and have measurement blind areas, various data numerical value characteristics are fused and analyzed and compared with the user side voltage, a voltage-power transmission coefficient is determined, an accurate voltage prediction model is constructed, and the voltage prediction value of the user side at each preset moment is obtained; as the time goes on or the photovoltaic fluctuates greatly, the error increases, so that the active power change in the preset time period and the active power difference of the user side at the to-be-measured moment are corrected based on the difference characteristics of the transformer station monitoring data, and the corrected available capacity of the inverter is obtained; and determining an adjustment burden index by combining the voltage predicted value, and finally adjusting the transformer according to an index accumulation condition and the voltage predicted value.

This invention relates to the field of coal-to-methanol production equipment technology, and more particularly to a distillation column for separating crude methanol by-products from coal-to-methanol production. The column includes a pre-distillation column, a pressurized distillation column, and an atmospheric distillation column. An energy-saving control device is installed between the pressurized and atmospheric distillation columns. The power control device controls the steam output of the pressurized distillation column, and then valve two controls the liquid phase distribution to the atmospheric distillation column, thereby achieving equilibrium and effectively saving energy. A temperature compensation device is installed between the pressurized distillation column and the reboiler. This device includes a heat storage body installed on pipeline two, with an insulation layer outside the heat storage body. A temperature sensor is installed near the end of the heat storage body. The heat storage body can store heat when the steam flow is high, thus stabilizing the power of the reboiler and providing a buffer time for delayed feedback control, ensuring stable operation of the three columns.

This invention discloses a microwave photonic power equalizer and a microwave photonic power equalization method based on power monitoring and compensation. The equalizer includes a light source, a carrier-suppressed double-sideband modulation module, an optical power control module, a data processing and driving module, an optical power detection module, and a photodetector. The light source is split into two paths via an optical coupler: one path inputs to the carrier-suppressed double-sideband modulation module, and the other path inputs to the optical power control module. The carrier-suppressed double-sideband modulation module also outputs a channel to the optical power detection module. This invention provides a microwave photonic power equalizer and a microwave photonic power equalization method based on power monitoring and compensation. It enables power equalization of broadband microwave signals in the optical domain, without being limited by the frequency and bandwidth of electronic devices. Power equalization can be performed in real time based on changes in the power of the input signal simply by changing the power of the optical carrier through the optical power control module. Furthermore, all components used can be integrated, achieving miniaturization.

The invention belongs to the technical field of power system regulation and control, and particularly relates to a regulation and control method and system for power balance of a distribution network system. The method comprises the steps that grid division is carried out on a distribution network system, each grid comprises a power supply and a load, the power supply comprises a new energy power supply and a traditional power supply, and the load comprises a flexible load; when the total power of the power supply and the total power of the load in the grid are unbalanced, regulating and controlling the power of the flexible load or the power of the new energy power supply in the grid in situ according to the total power of the power supply and the total power of the load in the grid; if the grid is still unbalanced after regulation and control, the distribution network monitoring system is used for regulating and controlling the traditional power supply power in the grid, so that the total power supply power and the total load power in each grid are balanced, the regulation and control time is shortened, the communication and operation pressure of the distribution monitoring system is reduced, the source load power in the grid can be quickly balanced, and the power of the whole distribution system is further quickly balanced; electricity utilization requirements of different types of loads are met, and overall reliable operation of a distribution network system is guaranteed.

The application relates to a vanadium flow battery energy storage power distribution method, device and system, and relates to the technical field of energy storage energy management. The method comprises the following steps: performing online parameter identification processing on an acquired equivalent loss model to determine battery identification parameters of a plurality of battery groups; determining the health states of the plurality of battery groups according to the battery identification parameters, original battery resistances and resistance values at a time of scrapping; determining the charging and discharging priorities of the plurality of battery groups according to the battery states of charge and the health states; selecting a plurality of target battery groups participating in power distribution from the plurality of battery groups according to total scheduling demand power and the charging and discharging priorities; determining a multi-objective function with the minimum battery working loss, the minimum state of charge uniformity and the minimum total life loss as targets according to the battery identification parameters and the battery states of charge, and constructing a multi-objective optimization model; and solving the multi-objective optimization model based on constraint conditions to obtain target power distribution results of the plurality of target battery groups.

The application relates to the field of silicon-based optoelectronic integration, and particularly discloses an on-chip adaptive combining method and a feedback system for polarization diversity MZM, which comprises the following steps: optical coupling and mode conversion, polarization diversity electro-optical modulation, optical power collection and photoelectric conversion, signal processing and feedback control, and a tunable combining module; after the coupling conversion and modulation, two-way optical power is collected and photoelectrically converted, a power difference voltage is obtained through an analog circuit, a control voltage is generated by superimposing a bias voltage, and a tunable combiner is driven to dynamically adjust a beam splitting ratio to complete combining. The application solves the problems that the output power of the polarization diversity MZM randomly fluctuates with the polarization state, the existing polarization control scheme has slow response, a complex structure and is difficult to integrate with a silicon-based process, realizes real-time and accurate compensation of power fluctuation, guarantees stable combining output power, and has a simple system structure, low power consumption, is easy to monolithically integrate with a silicon-based chip, and improves the performance and compatibility of an integrated photonic link.