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Electric quantity track sensitivity determination method

A trajectory sensitivity and determination method technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as "curse of dimensionality"

Pending Publication Date: 2016-02-17
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] However, the trajectory sensitivity usually needs to be simulated and calculated based on the power grid model, which will fall into the "dimension disaster" dilemma when the scale of the power grid becomes larger

Method used

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  • Electric quantity track sensitivity determination method
  • Electric quantity track sensitivity determination method
  • Electric quantity track sensitivity determination method

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Embodiment 1

[0048] The invention of this example provides a method for determining the sensitivity of the electrical quantity trajectory, such as Figure 7 As shown, it includes first converting the differential equation or differential equation system describing a certain model into an integral equation, and multiplying each state variable and its integral with the coefficient of the equation, such as UX=Y, and then obtaining its minimum value according to the principle of parameter identification Equivalent equation U in the sense of square T UX=U T Y, calculate the total differential of both sides of the equation to get the track sensitivity of U and Y to the parameter X.

[0049] The models of different equipment in the power system can be divided into three types: single input-single output, multiple input-single output, and multiple input-multiple output. The multiple input multiple output model can be represented by multiple sets of multiple input single output models. Since the ...

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Abstract

The invention relates to an electric quantity track sensitivity determination method. The electric quantity track sensitivity determination method comprises the following steps: establishing a differential equation or a differential equation set of a model of electric system equipment; converting the differential equation or the differential equation set into an integral equation; multiplying a state variable of equipment in the differential equation or the differential equation set by an integral equation coefficient to obtain an equation U X=Y; converting the equation into an equivalent equation through a least square method; and solving total differential of two sides of the equivalent equation to obtain track sensitivity to state variable parameters X by the integral equation coefficients U and Y. According to the technical scheme provided by the invention, the track sensitivity to power grid parameters or set parameters of each electric quantity is calculated in real time by using various electric energy tracks which are actually measured by a wide area measuring system (WAMS) of an electric system.

Description

Technical field: [0001] The invention relates to the field of power system stability analysis, and more specifically relates to a method for determining the sensitivity of an electric quantity trajectory. Background technique: [0002] Trajectory sensitivity can combine the dynamic response trajectory of known parameters to predict the dynamic trajectory of the system when the parameters change slightly, and can quantitatively reflect the impact of system parameter changes on the dynamic trajectory of the power grid. Therefore, in parameter identification and optimization, power system security assessment, transient It has a wide range of applications in stability prevention control, optimal power flow optimization, and dynamic security scheduling. [0003] Trajectory sensitivity provides the gradient information of parameters to trajectory. Therefore, the earliest example of its application in power system is parameter identification based on trajectory sensitivity or model...

Claims

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Application Information

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IPC IPC(8): G06Q50/06H02J3/00
Inventor 李志强何凤军王东阳李文峰肖洋
Owner CHINA ELECTRIC POWER RES INST
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