A Voltage Stability Evaluation Method Considering Load Characteristics and Source Constraints

A technology of voltage stability and load characteristics, applied in the field of voltage stability evaluation, can solve the problems of estimation result error and dependence on initial value, etc.

Active Publication Date: 2021-12-03
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

The disadvantage of this method is that it is very dependent on the initial value, and when the grid disturbance is large, the estimation result will also have a large error

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  • A Voltage Stability Evaluation Method Considering Load Characteristics and Source Constraints
  • A Voltage Stability Evaluation Method Considering Load Characteristics and Source Constraints
  • A Voltage Stability Evaluation Method Considering Load Characteristics and Source Constraints

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[0047]In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] Embodiments of the present invention will be described in detai...

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Abstract

The invention discloses a voltage stability evaluation method considering load characteristics and power supply constraints, which is characterized in that it includes the following steps: Step 1: Calculate the simplified admittance matrix Y of the simplified equivalent model of the network + ; Step 2: Calculate the equivalent network admittance matrix Y considering power supply constraints S ; Step 3: form the load characteristic matrix L relevant to load characteristic; Step 4: calculate the Thevenin equivalent parameter of system load, and carry out voltage stability evaluation; The voltage stability of the load can also be correctly evaluated in .

Description

technical field [0001] The invention relates to the technical field of voltage stability evaluation, in particular to a voltage stability evaluation method considering load characteristics and power constraints. Background technique [0002] Since the 1920s, power system stability has been carefully studied as an important prerequisite for safe operation. Until the late 1970s and early 1980s, due to the successive occurrence of grid disconnection accidents characterized by the collapse of the interconnected grid voltage , power system voltage stability began to be valued by people, and became an important sub-topic of grid stability research. [0003] With the emergence of PMU, using PMU data and Thevenin equivalent method to evaluate the voltage stability of the system has become an important direction in the study of voltage stability. Scholars at home and abroad have done a lot of work on the identification method of Thevenin equivalent parameters. The original literatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 娄源媛黎晓刘崇茹段秦刚钱峰罗钢伍双喜刘俊磊张子泳
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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