Allocation Method of Spare Capacity in Control Area of ​​Regional Power Grid

An allocation method and technology of reserve capacity, applied in the field of power system, can solve the problems of not considering the operation mode of the power grid and the constraints of the power grid network, the load change of the control area, the actual adjustable reserve capacity, etc.

Active Publication Date: 2016-06-29
EAST CHINA GRID
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Problems solved by technology

In the traditional way, the reserve allocation ratio of each control area is fixed throughout the year, without considering factors such as load changes in the control area, actual adjustable reserve capacity, and the actual situation such as the operation mode of the power grid and the constraints of the power grid network.

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  • Allocation Method of Spare Capacity in Control Area of ​​Regional Power Grid
  • Allocation Method of Spare Capacity in Control Area of ​​Regional Power Grid
  • Allocation Method of Spare Capacity in Control Area of ​​Regional Power Grid

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[0034] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0035] Power grid operation backup is mainly used to prevent power shortage caused by unit tripping, load prediction deviation and loss of external power supply. For a single control area: the tripping of internal units and the expected deviation of the load in this control area are internal risks, which should be borne by the control area itself, while the power shortage caused by DC faults outside the area or UHV AC faults in cross-area power transmission is an external risk. It should be shared by all control...

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Abstract

An embodiment of the invention provides a distribution method for reserve capacity of regional power grid control zones. The method includes the steps: acquiring internal risk reserves of the control zones by multiplying maximum expected load of the control zones by a first proportionality coefficient; subtracting the sum of internal risk reserves of all the control zones in a power grid from the total reserve of the whole grid to obtain a difference value, and multiplying the difference value by a second proportionality coefficient to acquire external risk reserves of the control zones; acquiring superposition reserves of the unblocked control zones according to the external risk reserves, maximum transmittable power, tie line plan power and a third proportionality coefficient of the blocked control zone; acquiring the total reserve distributed to the control zones by combining the internal risk reserves, the external risk reserves and the superposition reserves of the control zones. The method has the advantages that one scientific, reasonable and realistic distribution method for the reserve capacity in the regional dimension is provided, and quick recovery of grid system frequency is guaranteed.

Description

technical field [0001] The invention relates to the field of electric power systems, in particular to a method for allocating reserve capacity in a regional grid control area. Background technique [0002] The reason why the power system needs reserve capacity is mainly determined by the characteristics of power industry production and the imbalance of power consumption by users. The production, transmission and consumption of electric energy are carried out almost at the same time, and electric energy cannot be stored in large quantities, and the electricity consumption of users is also characterized by randomness and imbalance. Therefore, the power grid is very likely to experience disturbances such as random equipment outages and load fluctuations. In order to ensure the safe and reliable operation of the power system, ensure that the frequency is within the specified range, and avoid large-scale cascading failures or even large-scale power outages, sufficient operating ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06H02J3/00H02J3/003H02J2203/20
Inventor 周良才刘林林史济全
Owner EAST CHINA GRID
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