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Large-scale interconnected power grid spinning reserve risk assessment method based on state space division method

A technology of state space and interconnection grid, applied in the direction of power network operating system integration, electrical components, circuit devices, etc., can solve the problems of increased calculation time, inability to adapt to the requirements of regional interconnection, slow convergence, etc.

Active Publication Date: 2014-03-12
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

The simulation method is suitable for large systems, but its calculation time increases sharply with the improvement of index error accuracy requirements, and the convergence is especially slow for systems with high reliability such as actual power grids
[0005] (2) The state analysis algorithm of traditional standby risk assessment can no longer meet the requirements of regional interconnection, and cannot consider the constraints of regional tie lines
Traditional reserve risk assessment usually only considers the balance of power generation and load, ignoring the constraints of the transmission network. However, in the actual grid operation, the limit constraints of the transmission section of the regional tie line will have an important impact on the arrangement of the spinning reserve
[0006] Aiming at the problems of huge system scale and the inability to consider the constraints of regional tie lines in the risk assessment of large-scale interconnected grid spinning reserve, the present invention proposes a large-scale interconnected grid spinning reserve risk assessment method based on the state space partition method

Method used

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  • Large-scale interconnected power grid spinning reserve risk assessment method based on state space division method
  • Large-scale interconnected power grid spinning reserve risk assessment method based on state space division method
  • Large-scale interconnected power grid spinning reserve risk assessment method based on state space division method

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Embodiment 1

[0052] Example 1: Taking Fengda mode of Northwest Power Grid in 2010 (before it was connected to Xinjiang) as an example, evaluate the risk of system spinning reserve with a lead time of 1 hour. The plan to be evaluated includes 142 generating units, with a total capacity of 37330MW and a load of 36594.1MW. The system spinning reserve capacity accounts for 2.01% of the load. The algorithm is implemented using Visual C++6.0, and the computing environment is a computer with a CPU of 2.27GHz, a memory of 3.00GB, and a Windows 7 system.

[0053] Step A: Input relevant electrical parameters such as generators and transmission lines. The reliability data of generators and transmission lines adopt the statistical average value of the national power reliability indicators from 2005 to 2009 released by the Reliability Management Center of the Electricity Regulatory Commission;

[0054] Steps B-E: Use the quick sort method to select the system state so that the upper limit probability α...

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Abstract

The invention provides a large-scale interconnected power grid spinning reserve risk assessment method based on a state space division method Along with the appearance of a large-scale interconnected power grid, the quantity of elements of a power grid system is sharply increased, and the network scale is further complicated, thus the traditional reserve risk assessment method cannot meet the development requirements of the large-scale interconnected power grid, has the problems of curse of dimensionality in the aspect of state selection and inability of assessment in the aspect of state analysis, and can be influenced by transmission capacity restraint of area connecting lines. In the invention, the system state is selected by using a state space division method and analyzed by using a load reduction technology based on linear programming, thus the method better solves the problems of huge system scale and transmission capacity restraint of the area connecting lines in the spinning reserve risk assessment, realizes the quick and precise calculation of a spinning reserve risk index of the large-scale interconnected power grid, can provide real-time system spinning reserve information for personnel of a dispatching system, is beneficial for the dispatching personnel to taking effective measures in time, improves the reliability level of the system, and reduces the power-off risk of the system.

Description

technical field [0001] The invention relates to a power system analysis method, in particular to a large-scale interconnected power grid spinning reserve risk assessment method based on a state space segmentation method, which belongs to the field of power systems. Background technique [0002] A certain amount of spinning reserve capacity reserved by the power grid is the basis for safe and stable operation of the power grid. It can ensure that the system can smoothly transition to a new stable operating state when it is disturbed by a certain range. The risk of the power system is closely related to the size of the spinning reserve capacity. If the reserve capacity is too small, the risk of power outages will increase, which may cause serious social and economic losses. If the reserve capacity is large enough, the risk of power outages can be reduced, but at the same time it may cause waste of resources. . Deterministic spinning reserve criteria such as "load percentage" ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/14G06Q50/06
CPCY04S20/222Y02B70/3225
Inventor 何剑孙华东刘明松卜广全
Owner CHINA ELECTRIC POWER RES INST
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