Direct current power prompt drop method and system based on new energy field station power loss amount accurate perception

A DC power and new energy technology, applied in information technology support systems, reducing/preventing power oscillation, electrical components, etc., can solve problems such as loss of load, new energy off-grid, and affecting the safe and stable operation of the power grid

Active Publication Date: 2018-07-24
NORTHWEST BRANCH OF STATE GRID POWER GRID CO +1
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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, trigger...

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  • Direct current power prompt drop method and system based on new energy field station power loss amount accurate perception
  • Direct current power prompt drop method and system based on new energy field station power loss amount accurate perception

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The DC power rapid drop method based on the accurate perception of the power loss of the new energy station of the present invention includes the following steps: when the fault monitoring sub-station detects that an AC or DC fault occurs in the power grid, the fault monitoring sub-station sends the fault information of the power grid to the coordination Control the main station and the new energy control sub-stations distributed in each new energy station; after each new energy control sub-station receives the control pulse, it sends the control pulse to the new energy station centralized management and control system of the station; the new energy When the centralized management and control system of the station receives the control pulse, it immediately ...

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Abstract

The invention discloses a direct current power prompt drop method and system based on new energy field station power loss amount accurate perception. The method comprises the following steps that a fault monitoring substation sends power grid fault information to a coordinated control main station and a new energy control substation; the new energy control substation receives the power grid faultinformation and then sends the information to a new energy field station concentration management and control system; after receiving the power grid fault information, the new energy field station concentration management and control system calculates the total amount of new energy off-line active power from the information fed back by a new energy collection terminal; the new energy field stationconcentration management and control system sends the new energy off-line active power amount of the field station to the new energy control substation; and after the coordinated control main stationcalculates the total amount of the new energy off-line active power of the whole power grid, and a power grid execution station receives a prompt drop direct current power control command, prompt drop direct current power control is implemented. The method and the system are beneficial to frequency stability emergency control after a large-scale off-line state of a new energy unit, and are beneficial to ensuring the high proportion of the new energy and the safe and reliable operation of the power grid.

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...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J13/00
CPCH02J3/24H02J13/00019Y02E60/00Y04S10/16
Inventor 张振宇董希建牛拴保罗剑波柯贤波李碧君薛峰霍超崔晓丹夏海峰李明应刘平孙宁胡仁芝
Owner NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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