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Method for controlling scheduling tidal current limit of power grid

A control method, a technology for grid scheduling, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Inactive Publication Date: 2013-01-16
STATE GRID ANHUI ELECTRIC POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because for power system dispatchers, the main concern is the stability of the power system. Although the results of this method are relatively conservative, this is the inevitable result of offline stability calculations.

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  • Method for controlling scheduling tidal current limit of power grid
  • Method for controlling scheduling tidal current limit of power grid
  • Method for controlling scheduling tidal current limit of power grid

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Embodiment Construction

[0014] A control method for power grid dispatching power flow limit, first assuming that the load is constant, and then by adjusting the active power P of the generating set T , according to the formula (1) to calculate the critical limit cutting power angle δ C , calculate the critical limit power P according to formula (2),

[0015] ∫ δ 1 δ c ( P T - P II ) dδ = ∫ δ c δ h ( P III - P T ) dδ - - - ( 1 ) ...

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Abstract

The invention discloses a method of controlling the scheduling tidal current limit of a power grid, comprising the following step: calculating the critical limit removal power angle and the critical limit power P by supposing that the load is constant and adjusting the active power PT of a generator set. By collecting the power grid operation data in real time and calculating stably on line by an EMS or WAMS and calculating to obtain the tidal current limit of the cross section by adjusting the power of the generator set under the condition of supposing that the load is constant, the offline tidal current limit of the cross section is increased to the online tidal current limit, the calculated tidal current limit of the cross section is more that that obtained by adjusting the power of the generator set under the condition of supposing that the load is constant, the calculated tidal current limit of the cross section is accurate, and the security and stability of the power grid are guaranteed.

Description

technical field [0001] The invention relates to the field of power grid dispatching, in particular to a control method for the power flow limit of power grid dispatching. Background technique [0002] In the power system dispatching department, people usually use "section" to control the power flow. Using the concept of section to control power flow mainly takes into account the transient stability level and thermal stability level of the system. The section power flow control method for transient stability is to calculate the section limit power flow by adjusting the load under the assumption that the generator set is fully active. The section limit power obtained by this method is usually relatively conservative. This is because for power system dispatchers, the main concern is the stability of the power system. Although the results of this method are relatively conservative, this is the inevitable result of off-line stability calculations. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 王正风胡晓飞黄太贵赵晓春王栋何鸣杜林汪春燕
Owner STATE GRID ANHUI ELECTRIC POWER CO LTD