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An accurate simulation method for the characteristics of pumped storage power plants to optimize the operation of grid systems with wind power

A technology of pumped storage power station and simulation method, applied in wind power generation, single grid parallel feeding arrangement, electrical components, etc., can solve the problem of pumped storage power station not being able to discharge water for power generation, modeling, etc.

Active Publication Date: 2017-07-07
STATE GRID JIANGSU ECONOMIC RES INST +5
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In actual system dispatching, if the system abandons wind, then at this time, the pumped storage power station cannot release water to generate electricity, and none of the existing dispatching models have modeled this constraint

Method used

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  • An accurate simulation method for the characteristics of pumped storage power plants to optimize the operation of grid systems with wind power
  • An accurate simulation method for the characteristics of pumped storage power plants to optimize the operation of grid systems with wind power
  • An accurate simulation method for the characteristics of pumped storage power plants to optimize the operation of grid systems with wind power

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Embodiment Construction

[0068] The present invention will be further described below in combination with a specific embodiment.

[0069] The first step is to linearly model the wind curtailment state of the system:

[0070]

[0071] In the formula, A t It is a binary variable, which indicates the status variable of system wind curtailment in period t. When its value is 1, it means that the system has curtailed wind; is a non-negative variable, indicating that the system accepts wind power in period t; is a constant, indicating the power predicted by wind power theory in the t period; eps is a positive infinitesimal quantity. When the system abandons wind, that is, the theoretical wind power output is greater than the system’s accepted wind power output Due to the constraints of formula (1), at this time A t = 0; when there is no wind curtailment in the system, the accepted wind power output is equal to the theoretical output, due to the constraints of formula (1), at this time A t =1. In ...

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Abstract

The invention relates to a pumped storage power station characteristic accurate simulation method for optimized operation of a wind power contained power grid system. The pumped storage power station characteristic accurate simulation method comprises the steps of: modeling a wind curtailment state of the wind power contained power grid system into a wind curtailment state linear function related to a binary variable; modeling relevant operating states of all pumped storage power stations in the system into a power station operating state linear function related to the binary variable on the basis of the binary variable; constraining the system through the combination of the two linear functions; and simulating output states of the pumped storage power stations when the system is in the wind curtailment state. The pumped storage power station characteristic accurate simulation method has the beneficial effects of conducting linear modeling on the situation that power generation by releasing water is forbidden by the pumped storage power stations when the system is in the wind curtailment state so that a model made by a power grid annual operating plan accurately considering pumped storage power station characteristics is still a mixed integer programming model, ensuring solving efficiency of the mode, being more inline with the actual power system dispatching condition and the actual operation conditions of the pumped storage power stations, and being capable of providing most intuitive judgment basis for dispatchers through calculation results.

Description

technical field [0001] The invention relates to a method for optimal operation of a power grid, in particular to a method for accurately simulating the characteristics of a pumped storage power station that enables the optimal operation of a wind power grid system. Background technique [0002] Because the stability of wind power generation is not high, there will be a large deviation between the actual grid power of wind power and the predicted power. Scheduling bottleneck. [0003] In the formulation of the annual dispatching operation plan of the power system including wind power, in order to improve the comprehensive energy utilization efficiency of the power system and solve the bottleneck problem of wind power development, domestic and foreign research institutions have carried out a number of related research projects in recent years. The use of energy storage technology to solve the uncertainty of wind power output and anti-peaking problems is the most intuitive sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/00
CPCY02E10/76
Inventor 孙建龙黄俊辉杨林谢珍建胡煜王亮曹阳袁越杨清张程飞
Owner STATE GRID JIANGSU ECONOMIC RES INST
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