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Voltage Stability Preventive Control Method Based on Generator Reactive Power Reserve Sensitivity

A technology of voltage stabilization and preventive control, applied in reactive power compensation, AC network voltage adjustment, reactive power adjustment/elimination/compensation, etc., can solve problems such as slow calculation speed, achieve good adaptability, good robustness, Simple and intuitive effect of reactive power reserve sensitivity

Inactive Publication Date: 2016-11-23
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the calculation speed of this type of method is slower and there are many intermediate results, the algorithm of each subtask is mature, so the robustness of the algorithm is easy to guarantee

Method used

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  • Voltage Stability Preventive Control Method Based on Generator Reactive Power Reserve Sensitivity
  • Voltage Stability Preventive Control Method Based on Generator Reactive Power Reserve Sensitivity
  • Voltage Stability Preventive Control Method Based on Generator Reactive Power Reserve Sensitivity

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Embodiment Construction

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] The voltage stability preventive control method based on generator reactive power reserve sensitivity involved in the present invention, such as figure 1 Shown, including the following 4 steps.

[0039] Step 1. Establish critical fault sets and identify critical generators

[0040] Step 101, establishing a severe fault set:

[0041] Considering each fault, the voltage stability margin after fault is calculated by continuous power flow, and it is regarded as a serious fault when it is less than the minimum required value.

[0042] ...

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Abstract

The invention discloses a voltage stabilization prevention and control method based on the reactive storage sensitivity of generators, and belongs to the technical field of power system steady-state stability prevention and control. The method comprises the steps that a major failure set is determined, and key generators under major failures are determined; the reactive storage sensitivity of control variables on the key generators under the major faults is calculated; most sensitive control variables corresponding to all control types are selected to form a participating control set, and then a quadratic programming optimal control model is established; the quadratic programming optimal control model is solved, and a prevention and control scheme is determined. By means of the method, the reactive storage sensitivity of the generators can be determined without the calculation of load margin sensitivity, and the reactive storage sensitivity of the generators become more simple and visual; quadratic programming is carried out after the most sensitive control variables corresponding to all the control types are selected to form the participating control set, the established quadratic programming optimal control model is good in adaptation and robustness, and the calculation effectiveness of the quadratic programming problem is improved.

Description

technical field [0001] The invention discloses a voltage stability preventive control method based on generator reactive power reserve sensitivity, and belongs to the technical field of static stability preventive control of electric power systems. Background technique [0002] With the rapid development of the economy and the deepening of the market-oriented reform of the power industry, the problem of voltage stability in the power system is becoming more and more serious. The main reasons are: the requirements for the economical operation of the power grid and the consideration of environmental protection, the operation of the power grid equipment is getting closer to its limit value; the formation of large-capacity long-distance power transmission and AC-DC interconnection grid makes the grid structure more complex. In order to meet the increasing load and at the same time obtain the maximum economic benefits, the operators tend to maximize the transmission capacity of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16H02J3/18
CPCY02E40/30
Inventor 赵晋泉饶燕
Owner HOHAI UNIV
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