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Reactive power optimization method and system based on weak points of power grid

An optimization method and weak point technology, applied in the field of reactive power optimization method and system, can solve problems such as inability to effectively adjust voltage, weak points, etc.

Active Publication Date: 2021-08-27
山东国瑞电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing controllable equipment should cooperate with online voltage stability analysis, quantitatively adjust according to the voltage operation level and control strategy, and maintain the voltage stability and voltage operation level of the power grid, mainly including: group switching shunt compensator; load regulation transformer; Phase shifter with load; generator terminal voltage regulation; load shedding and other control strategies; the inventor found in the research that there are voltage weaknesses that cannot be effectively adjusted in the existing control regulation strategy

Method used

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  • Reactive power optimization method and system based on weak points of power grid
  • Reactive power optimization method and system based on weak points of power grid
  • Reactive power optimization method and system based on weak points of power grid

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Embodiment 1

[0055] This embodiment discloses a reactive power optimization method based on weak points of the power grid, including:

[0056] Step 1: Based on the voltage stability and local bifurcation theory of the grid, define the weak points of the grid;

[0057]Step 2: Define the load growth pattern based on the forecasted load and power generation plan, and use the continuous power flow method to identify weak points in the power grid;

[0058] Step 3: quickly analyze the voltage stability under the expected fault set based on the sensitivity method and Look-Ahead;

[0059] Step 4: Design preventive and enhanced control measures based on linear control theory.

[0060] Regarding step 1, it should be noted that the determination of weak nodes is an important part of voltage stability research, and these nodes generally have the following characteristics:

[0061] Has the highest voltage breakdown point on the V-Q curve;

[0062] The lowest reactive power margin;

[0063] Most rea...

Embodiment 2

[0203] The purpose of this embodiment is to provide a computing device, including a memory, a processor, and a computer program stored in the memory and operable on the processor. step.

Embodiment 3

[0205] The purpose of this embodiment is to provide a computer-readable storage medium.

[0206] A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the specific steps in the first embodiment above are executed.

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Abstract

The present disclosure proposes a reactive power optimization method and system based on the weak point of the power grid, including: using a nonlinear dynamic system to analyze and evaluate the dynamic stability characteristics of the power system and a base value of the system margin, and obtain the weak link of the power grid based on the base value; Calculate the PV curve after the fault according to the weak link of the power grid; based on the PV curve, the components related to active power distribution and the components related to reactive power and voltage are controlled separately to optimize the voltage and reactive power control scheme. The reliability, accuracy and precision of the power grid weak link analysis method are verified, and the reliability and accuracy of the reactive power optimization scheme implemented for weak points under different operating modes and different load conditions are verified.

Description

technical field [0001] The disclosure belongs to the technical field of power grids, and in particular relates to a reactive power optimization method and system based on weak points of power grids. Background technique [0002] With the rapid development of social economy, the construction of power facilities is not enough to meet the growing needs of people. The power grid runs at full load or even overload most of the time. To ensure the safe and stable operation of the power system, there are After a sudden accident, to take fast and safe control measures, it is necessary to conduct a safety and stability analysis of the power system in advance. The identification and analysis of power grid weak links is an important link in the analysis of power system security and stability. [0003] One of the most common characteristics in the process of voltage collapse is that the system cannot meet the reactive power demand on some nodes of the network, which causes the voltage o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/10Y02E40/30
Inventor 闫红华张传平
Owner 山东国瑞电力科技有限公司