Risk-based calculation method of safety and stability preventive control performance cost index of large power grid
A preventive control, safe and stable technology, applied in computing, electrical digital data processing, special data processing applications, etc., can solve problems that cannot meet the risk prevention and control decision-making requirements of large power grids
Active Publication Date: 2017-01-18
STATE GRID ELECTRIC POWER RES INST +1
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[0006] The purpose of the present invention is to provide a risk-based method for calculating the performance cost index of large power grid security and stability preventive control in view of the fact that the existing security and stability control energy index calculation technology can only be used for deterministic power grid security and stability analysis and control decision-making , to solve the problem that the existing calculation technology of control performance cost index cannot adapt to the decision-making requirements of risk prevention and control for the safe and stable operation of large power grids
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[0056] The present invention will be described in further detail below with reference to the accompanying drawings and examples.
[0057] figure 1 Step 1 described in is to conduct a grid operation security risk assessment. Based on the quantitative evaluation results of power grid security and stability, the safety and stability margin cannot meet the expected requirements as the failure consequence, and combined with the expected failure probability information, analyze and calculate the power grid operation safety risk under the expected failure, including system operation power angle stability risk and component operation transient state Security risks and static security risks.
[0058] For power grid transient safety and static safety problems, the risk element is the element whose safety margin cannot meet the expected requirements under the expected fault, and the risk value of the element under the expected fault is calculated by using the difference between the expe...
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The invention discloses a large grid safe stable prevention and control performance penalty index calculation method based on risks and belongs to the technical field of grid systems and grid system automation. The method includes evaluating grid operation safety risks under an estimated fault set, determining estimated fault and safety stability problems and relevant elements subjected to risk level reduction through prevention and control according to acceptability degree of various risks, further determining a risk prevention and control target, analyzing and determining unit force reducing and load limit control measures having effect on risk prevention and control in a candidate prevention and control measure set based on safe stable mode information and finally calculating control performance penalty index of unit force reducing and load limit control measures. By means of the method, large grid safe stable prevention and control performance penalty index calculation based on risks is achieved, and the method provides effective technical support for large grid safe stable operation risk prevention and control decision making.
Description
technical field [0001] The invention belongs to the technical field of electric power system and automation thereof. More precisely, the invention relates to a risk-based method for calculating a performance cost index of a large power grid safety and stability prevention control. Background technique [0002] On-line security and stability analysis technology has been widely used. According to the grid operation mode provided by the grid energy management system (EMS), the security and stability assessment and control decision-making analysis and calculation of the specified expected faults provide important information for dispatching and operating personnel to control the grid. technical support. The quantitative analysis theory of transient safety and stability can provide safety and stability margins and models, and the patented technology "Recognition Method of Component Participation Factors in Power System Transient Safety and Stability Model (ZL200910026801.4)" quan...
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IPC IPC(8): G06F19/00
Inventor 李碧君徐泰山刘强罗剑波刘韶峰王昊昊尹玉君许剑冰
Owner STATE GRID ELECTRIC POWER RES INST