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Automatic generating method for day-ahead plan power flow in power grid

An automatic generation, planning technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2012-08-01
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to propose a method for automatically generating the day-ahead planned power flow of the power grid to solve the shortcomings of the existing method of generating the day-ahead planned power flow based on DC power flow

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  • Automatic generating method for day-ahead plan power flow in power grid
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  • Automatic generating method for day-ahead plan power flow in power grid

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Embodiment Construction

[0065] The method for automatically generating the forward plan power flow in the power grid proposed by the present invention has a process such as figure 1 As shown, including the following steps:

[0066] (1) According to the grid topology structure before the scheduled day and the start-up and shutdown plan of the generator set on the scheduled day, the equipment maintenance plan and the load switching plan, generate a scheduled day grid topology;

[0067] In the method of the present invention, the grid topology structure before the scheduled day includes the parameters of all the equipment in the grid before the scheduled day, the running state of the generator, and the switch-on / off state of the switch. For the generators scheduled to start power generation on the day and the equipment that is re-inserted into the power grid in the day-a-day maintenance plan, topology search is required. Starting from the generator end and both ends of the equipment, search for the connectio...

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Abstract

The invention relates to an automatic generating method for a day-ahead plan power flow in a power grid and belongs to the technical field of electric power system scheduling automatization. According to the invention, problems generated by the day-ahead plan power flow are resolved into active subproblems and reactive subproblems which are solved step by step; the subproblems are converted into constraint non-linear optimization problems which are solved by an interior point algorithm; the active subproblems are adopted to preliminarily eliminate mismatching quantity between a system electric generating set power generation plan and bus load projection data and coordinate the inconsistency between the electric generating set power generation plan and a communication section power transmission plan; and the reactive subproblems and active readjustment procedures are adopted to further eliminate the mismatching quantity between a system generating power and a load power, and an active power transmitted by the communication section is controlled according to the plan, and as a result, a reasonable and majorizing day-ahead reactive voltage plan is obtained. According to the invention, a credible day-ahead plan AC power flow can be effectively provided for a day-ahead plan safe checking module. Therefore, the method has favorable reliability and practicability.

Description

Technical field [0001] The invention relates to a method for automatically generating the day-ahead planned tidal current in a power grid, and belongs to the technical field of power system dispatching automation. Background technique [0002] The power system is a complex dynamic system with high dimensionality and strong nonlinearity, and its operation stability is the primary issue for safe production of the power grid. For a long time, the day-ahead operation plan of the power grid has been the main basis for the power grid dispatching department to determine the future operation mode of the power grid and guide power production, and it is developing in the direction of the joint operation plan and static and transient safety checks. A reasonable day-ahead operation plan is directly related to the safe and economic operation of the power grid in the future. The current day-ahead plan power flow generation mainly generates a DC power flow solution based on the active power ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 孙宏斌张伯明吴文传郭庆来林毅
Owner TSINGHUA UNIV
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