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Method for inhibiting line power oscillation of interconnected electric power system via energy storing device

A tie-line power and energy storage device technology, applied in the direction of reducing/preventing power oscillation, etc., can solve problems such as power oscillation

Inactive Publication Date: 2011-02-09
CENT CHINA GRID +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for suppressing the power oscillation of the tie line of the interconnected power system by using an energy storage device, so as to solve the problem of power oscillation on the important tie line of the large interconnected power system

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  • Method for inhibiting line power oscillation of interconnected electric power system via energy storing device
  • Method for inhibiting line power oscillation of interconnected electric power system via energy storing device
  • Method for inhibiting line power oscillation of interconnected electric power system via energy storing device

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Embodiment Construction

[0019] The invention provides a method for suppressing the power oscillation of an important tie-line between interconnected power system regions by using an energy storage device. The method takes the line power of the tie-line connected to the busbar where the energy storage device The energy storage equivalent conductance is obtained after the direct link and the phase shift link, and then the energy storage function command value is obtained by multiplying the equivalent conductance by the square of the machine terminal voltage. The energy-storage frequency converter generates specified active power through a given power value and injects it into the grid, thereby suppressing power oscillation on the transmission line.

[0020] The method provided by the invention is as follows: in the first step, the systems at both ends of the connecting line are equivalent to two equivalent generators to form a dual-machine system, and the controller parameters are designed by using the ...

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Abstract

The invention provides a method for inhibiting the line power oscillation of an interconnected electric power system via an energy storing device. The method adopts the power of the line connected with a bus where the energy storing device is as an input signal, obtains an equivalent conductivity through a measurement amplifying link, a stopping link and a phase shifting link, and then obtains an active power instruction value needing to be output by the energy storing device by multiplying the equivalent conductivity by the square of a terminal voltage. A transducer of the energy storing device generates an appointed active power to the power grid through a given power value so as to inhibit the power oscillation of the line. The invention does not depend on a remote communication; the controller has simple and reliable structure and easily adjusted parameters; and a 300MW energy storing device can inhibit a power oscillation with amplitude about 1400MW.

Description

technical field [0001] The invention belongs to the technical field of power system stability control, and in particular relates to the application technology of an energy storage device in power system power oscillation suppression. Background technique [0002] The 38th Research Committee of the International Large Power Grid Conference once organized a special working group (Task Force 38.01.07) to study low-frequency oscillations. Its conclusion pointed out that: in order to eliminate the threat of oscillations, the power system of the main generator in the tuning system should first be carefully considered. stabilizer (PSS); secondly, the parameter setting of the additional controllers of the existing high-voltage direct current transmission (HVDC) and static var compensator (SVC) in the system should be studied so that they can provide additional damping effects; then consider using FACTS devices such as TCSC to provide Smooth damping control; finally consider adding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
Inventor 徐友平郑俊杰李勇凌卫家林卫星吴晋波孙海顺文劲宇
Owner CENT CHINA GRID
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