Abstract: The invention discloses a method for managing communication authority based on multi-energy equipment data flow using digital twin and a system thereof, comprising the following steps: generating a unique permission code; Establishing a data flow interaction channel; utilizing a broadcast detection mechanism to periodically check the data flow communication authority based on the channel and continuously remove the data flow interaction channel that is expired and illegally authorized, thus to complete the data flow communication management. The present invention has the advantages that the management is more scientific, the algorithm is clearer, more efficient and safer, and the level is well arranged; the channel resource utilization rate is improved, filling the gap in the current stage of a method for managing communication authority based on multi-energy equipment data flow using digital twin and a system thereof, and ensuring the real-time mapping between physical entities and virtual images.

Abstract: A method for programming the energy storage device in power-gas coupling system based on reliability constraints is provided. The method includes: obtain the parameters and operation condition of each equipment of the power-gas coupling system in a year; determine the different operating states of the system. A programming model of the energy storage device based on reliability constraints is constructed based on the operating state of the system, and benders decomposition algorithm is adopted to calculate the programming model, so that the programming scheme of the energy storage device is obtained. Considering not only the economy but also the reliability of the system, which is more accurate, comprehensive and effective than the previous programming method; the present invention is of great significance to improve the reliability of the electric power system and ensure the safe and reliable operation of the electric power system.

Abstract: The invention discloses a power feedback control system and method of MGP system, including detecting the actual active power delivered by the generator to the grid through the measurement and calculation module; making a difference between the measured active power and the given active power; calculating the frequency regulation amount through the PI regulation module according to the difference, and taking it as feedback; calculating the frequency reference value of the converter in the control system; and fine tuning the frequency of the converter through the PI regulation module; regulating the phase difference through frequency modulation; realizing the goal of controlling the power output, so that when predicting the output power of new energy before MGP is connected to the grid based on power feedback control, the output of the control system will not be delayed and the defects that affect the stability and reliability of the control system will not appear, to ensure the successful introduction of new

Abstract: The invention discloses a method for MGP new energy grid-connected control, wherein, the synchronous motor is connected to a synchronous generator; the new energy module drives the synchronous motor to rotate through a frequency converter; the frequency converter controls the power transmission; and the synchronous motor drives the synchronous generator for grid connection. The present invention has the beneficial effects that: the control method and system provided by the invention can improve the stability and reliability of the grid.

Abstract: The invention discloses a method for managing communication authority based on multi-energy equipment data flow using digital twin and a system thereof, comprising the following steps: generating a unique permission code; Establishing a data flow interaction channel; utilizing a broadcast detection mechanism to periodically check the data flow communication authority based on the channel and continuously remove the data flow interaction channel that is expired and illegally authorized, thus to complete the data flow communication management. The present invention has the advantages that the management is more scientific, the algorithm is clearer, more efficient and safer, and the level is well arranged; the channel resource utilization rate is improved, filling the gap in the current stage of a method for managing communication authority based on multi-energy equipment data flow using digital twin and a system thereof, and ensuring the real-time mapping between physical entities and virtual images.

Abstract: The present invention discloses a method for programming the energy storage device in power-gas coupling system based on reliability constraints, obtain the parameters and operation condition of each equipment of the power-gas coupling system in a year; determine the different operating states of the system; A programming model of the energy storage device based on reliability constraints is constructed based on the operating state of the system, and benders decomposition algorithm is adopted to calculate the programming model, so that the programming scheme of the energy storage device is obtained. Considering not only the economy but also the reliability of the system, which is more accurate, comprehensive and effective than the previous programming method; the present invention is of great significance to improve the reliability of the electric power system and ensure the safe and reliable operation of the electric power system.

Abstract: Non-fault disturbance-based method and system for measuring short-circuit capacity of a power grid on site including: connecting or disconnecting a reactive compensation device to or from a power grid point of common coupling, to generate a disturbance on a power grid; obtaining total active power and total reactive power of a load of the point of common coupling before the disturbance; determining a vector difference between a voltage of the power grid point of common coupling before the disturbance and a voltage of the power grid point of common coupling after the disturbance; obtaining a voltage effective value of the power grid point of common coupling before the disturbance; obtaining a capacity of the reactive compensation device; and determining a short-circuit capacity of the point of common coupling according to total active power, total reactive power, vector difference between voltages, voltage effective value, and capacity of the reactive compensation device.

Abstract: Non-fault disturbance-based method and system for measuring short-circuit capacity of a power grid on site including: connecting or disconnecting a reactive compensation device to or from a power grid point of common coupling, to generate a disturbance on a power grid; obtaining total active power and total reactive power of a load of the point of common coupling before the disturbance; determining a vector difference between a voltage of the power grid point of common coupling before the disturbance and a voltage of the power grid point of common coupling after the disturbance; obtaining a voltage effective value of the power grid point of common coupling before the disturbance; obtaining a capacity of the reactive compensation device; and determining a short-circuit capacity of the point of common coupling according to total active power, total reactive power, vector difference between voltages, voltage effective value, and capacity of the reactive compensation device.