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Electric power system optimal support set positioning method based on anticipated fault decomposition

A technology of anticipating faults and power systems, applied in the field of power systems, can solve problems such as rising unit heat consumption, decreasing utilization hours of thermal power units, and decreasing unit efficiency

Active Publication Date: 2017-08-22
HANGZHOU E ENERGY ELECTRIC POWER TECH +2
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Problems solved by technology

As the daily load curve of the power grid increases day by day, the utilization hours of thermal power units drop significantly. When the operating load of the units decreases, the heat consumption of the units increases sharply, and the efficiency of the units drops sharply.

Method used

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  • Electric power system optimal support set positioning method based on anticipated fault decomposition
  • Electric power system optimal support set positioning method based on anticipated fault decomposition
  • Electric power system optimal support set positioning method based on anticipated fault decomposition

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Embodiment Construction

[0080] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0081] This embodiment provides a method for screening severe transient faults in power systems, such as figure 1 shown, including the following steps:

[0082] Step (1): Load the steady-state power flow data of the power system, the safety constraint data of generators, busbars, lines and other components, the rampability data of existing generators, and the expected fault collection data of the power grid;

[0083] Step (2): Calculate the power flow in the normal mode of the power grid to obtain the initial operating point;

[0084] Step (3): Based on the data obtained in steps (1)-(2), establish a safety-constrained optimal power flow model of the power system with the goal of minimizing the ramp-up capability of generating units;

[0085] Step (4): Based on the model obtained in step (3), use the expected fault decomposition method to decompose th...

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Abstract

The invention discloses an electric power system optimal support set positioning method based on anticipated fault decomposition. In order to stabilize the frequency of a power grid, multiple units having decisive effects on safety and reliability of the power grid need to be selected. The method comprises steps of by considering different anticipated faults of the power grid, establishing an electric power system safety restraining optimal power flow mode by taking the minimization of the climbing ability of generator sets as an objective; adopting an anticipated fault decomposition method to decompose the model into a main problem under a normal operation mode and sub problems under each anticipated fault operation mode; through iteration solving of the main problem under the normal operation mode and the sub problem under each anticipated fault operation mode, achieving solving of above electric power system safety restraining optimal power flow mode; and according to the steps, solving the smallest climbing ability transformation quantity of the generator sets, carrying out progressively decreased ranking on the generator sets with the non-zero transformation quantity and successively recording the generator sets to be the optimal support sets with progressively decreased priorities according to the sequences to be output as the results. The method is excellent in applicability and actual requirements are well met.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, in particular to a method for locating optimal supporting units in electric power systems based on expected fault decomposition. Background technique [0002] Currently, electric power construction is developing rapidly. On the one hand, power supply construction projects in various regions are still growing rapidly, and the proportion of wind power and nuclear power is increasing year by year; At the same time, the national economy is undergoing structural adjustment, and the social power consumption structure has undergone major changes. As the daily load curve of the power grid increases day by day, the utilization hours of thermal power units drop significantly. When the operating load of the units decreases, the heat consumption of the units increases significantly, and the efficiency of the units decreases significantly. Therefore, when the utilization hours of thermal power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/46
CPCH02J3/00H02J3/001H02J3/46H02J2203/20
Inventor 罗志浩尹峰陈波丁宁苏烨丁俊宏
Owner HANGZHOU E ENERGY ELECTRIC POWER TECH
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