Method for power network splitting and load shedding

A power grid and decoupling technology, applied in the field of grid decoupling and load shedding, can solve problems such as increasing the complexity of power grid control, and achieve the effect of improving the level of safe and stable operation and avoiding frequency reduction.

Inactive Publication Date: 2010-07-07
CHINA HUADIAN ENG +2
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Problems solved by technology

The grid-connection of these power systems not only increases the complexity of grid control, but

Method used

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  • Method for power network splitting and load shedding
  • Method for power network splitting and load shedding
  • Method for power network splitting and load shedding

Examples

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[0030] Example

[0031] A method for power grid splitting and load shedding, which is characterized by: including low-frequency slip and high-frequency slip splitting, low-frequency overload splitting and directional phase-to-phase or ground fault splitting, and receiving electric power splitting during splitting Reduce the load to improve the safe and stable operation of the self-provided power system and the main grid power system.

[0032] Such as figure 1 with figure 2 Shown.

[0033] The low-frequency slip and high-frequency slip are decomposed as follows: In order to ensure the reliable and rapid action of the device under the sudden change of load or unit output, the frequency f of the bus or tie line is less than LF s0 (48.5Hz), and frequency slip df / dts0 (-1.2Hz / s) in the case of de-loading the system; or when the bus or tie line frequency f is greater than HF s0 (51Hz), and frequency slip df / dt>dF s1 (1.2Hz / s) in the case of unloading system.

[0034] LF s0 : Low-frequenc...

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Abstract

The invention relates to a method for power network splitting and load shedding. The method is characterized by the following splitting: low slip frequency splitting, high slip frequency splitting, low frequency overload splitting and splittings for alternative directions or ground fault. In addition, the splitting with a multi-round load shedding is carried out according to the received electrical power. The method of the invention can be employed to improve level of safe and stable operation of a self-propelled power system and a main network power system.

Description

technical field [0001] The invention relates to a method for unloading and load shedding of a power grid, and belongs to the technical field of power grid safety. Background technique [0002] In order to improve the utilization efficiency of the power supply and enhance the reliability and stability of the power system operation, the self-provided power stations of enterprises generally need to be connected to the national grid for operation. The grid-connection of these power systems not only increases the complexity of grid control, but also brings security and stability problems of the grid, often leading to large-scale power outages. In this regard, the most effective means is to realize the separation and load reduction of the power grid in emergency situations. Contents of the invention [0003] The purpose of the present invention is to provide a method for grid splitting and load reduction. It can improve the safe and stable operation level of the self-contained...

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
Inventor 马洪涛高西周文平王强强
Owner CHINA HUADIAN ENG
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