Overload adjusting method of power transmission network

Abstract

The invention discloses an overload adjusting method for a power transmission network. The method comprises that a shortest electrical distance between any two nodes in the power transmission network is obtained an a shortest path manner, and a shortest path set is formed; a line A0B0 is determined to be overloaded, and according to the shortest path set, a nearest node A1, a second nearest node A2 to a farthest node Am of the node A0 as well as a nearest node B1, a second nearest node B2 to a farthest node Bm of the node B0 are obtained; and output adjustment is carried out on a normal thermal plant set. According to the invention, nearby adjustment is carried out via the shortest path manner, thereby rapidly reducing the overload of the line with fewer adjustment times, and minimizing the influence of line overload on the operation stability of the electrical network; and fossil fuel consumption and corresponding carbon discharge caused by generating set adjustment are considered, so that output power of the normal thermal generating set is adjusted in priority, waste of clean low-carbon power supply as water and wind power is avoided as possible, and the influence of line overload on carbon discharge of a system is minimized.

Description

technical field [0001] The invention belongs to the field of power systems, and more specifically relates to an overload adjustment method of a transmission network. Background technique [0002] Since the 1990s, in order to cope with the challenge of global warming, governments and related organizations have taken active measures. In 1992, the United Nations General Assembly adopted and signed the "United Nations Framework Convention on Climate Change" (referred to as: UNFCCC), and further in December 1997, at the UNFCCC Conference of the Parties, the "Kyoto Protocol" was formulated and passed to limit human activities. Emissions; in 2003, the British government announced the National Energy White Paper, which first proposed the development concept of "low-carbon economy"; and at the World Climate Conference held in Copenhagen, Denmark in 2009, the Chinese government also made a goal of achieving my country's unit GDP by 2020. CO 2 The solemn commitment to reduce emissions ...

AI Technical Summary

Problems solved by technology

The overload of transmission lines is a common phenomenon in the operation of power systems. If it is not reduced in time, it will affect the safety and stability of the system operation. At present, there is no complete line overload reduction technology and theoretical system, especially when the installed capacity of hydropower continues to increase. Under the new situation of large-scale wind power grid integration, how to timely and effectively reduce the overload phenomenon of transmission lines, and at the same time minimize the resulting system loss and carbon emissions, and improve the supporting role of the transmission network for the low-carbonization of the power system, is an urgent problem to be solved

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