DC power drop method and system based on accurate perception of power loss in new energy stations

Abstract

The DC power downshift method and system based on the accurate perception of the power loss of the new energy station of the present invention include the fault monitoring substation sending power grid fault information to the coordination control main station and the new energy control substation; the new energy control substation; After receiving the grid fault information, the station sends it to the centralized management and control system of the new energy station; after the centralized management and control system of the new energy station receives the grid fault information, it calculates the total amount of off-grid active power of the new energy through the information fed back from the new energy collection terminal; The energy station centralized management and control system sends the new energy off-grid active power of this station to the new energy control sub-station; after the coordinated control master station calculates the total amount of new energy off-grid active power in the whole network, the power grid execution station receives all the off-grid active power. After the speed-down DC power control command is given, implement the speed-down DC power control. The invention is beneficial to the frequency stability and emergency control after the large-scale off-grid of the new energy unit, and is beneficial to ensure the safe and stable operation of the power grid with a high proportion of new energy.

Description

technical field [0001] The invention relates to a direct current power drop method and system based on accurate perception of power loss in new energy stations, and belongs to the technical field of electric power systems and automation thereof. Background technique [0002] Wind power and solar power generation occupy an important position in the new energy development strategies of all countries in the world by virtue of their relatively mature technology and abundant resources. However, the performance of new energy power such as wind power and solar power generation is significantly weaker than that of conventional units in terms of frequency and voltage resistance. Leading to large-scale new energy off-grid, triggering a low-frequency chain reaction of the system, affecting the safe and stable operation of the power grid, easily triggering low-frequency load shedding actions and losing a large amount of load, and even causing the grid to collapse in severe cases. In re...

AI Technical Summary

Problems solved by technology

However, the performance of new energy power such as wind power and solar power generation is significantly weaker than that of conventional units in terms of frequency and voltage resistance. Leading to large-scale new energy off-grid, triggering a low-frequency chain reaction of the system, affecting the safe and stable operation of the power grid, easily triggering low-frequency load shedding actions and losing a large amount of load, and even causing the grid to collapse in severe cases

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