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A Reactive Power Optimization Method with Transient Voltage Safety Constraints Based on Cooperative Game

A technology of transient voltage and safety constraints, applied in reactive power compensation, AC network voltage adjustment, AC network with the same frequency from different sources, etc., can solve the problems of difficult parameter setting, long time consumption, etc., and achieve the goal of improving solution efficiency Effect

Active Publication Date: 2022-05-10
TSINGHUA UNIV +2
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  • Abstract
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Problems solved by technology

However, because the relevant parameters in this type of algorithm do not have practical meaning, there are generally problems of difficult parameter setting, and there are defects such as too long time-consuming in solving practical problems.

Method used

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  • A Reactive Power Optimization Method with Transient Voltage Safety Constraints Based on Cooperative Game
  • A Reactive Power Optimization Method with Transient Voltage Safety Constraints Based on Cooperative Game
  • A Reactive Power Optimization Method with Transient Voltage Safety Constraints Based on Cooperative Game

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Embodiment Construction

[0066] The present invention proposes a reactive power optimization method with transient voltage safety constraints based on cooperative game, including the following steps:

[0067] (1) According to the provisions of my country's power system safety and stability guidelines "in the transient and dynamic process after the power system is disturbed, the load bus voltage can be restored to above the specified operating voltage level", a voltage response curve based on the voltage response curve can be defined The quantitative evaluation index TVSI of transient voltage safety is shown in the following formula:

[0068]

[0069] Where: V 0 and V' min Respectively represent the initial value of the node voltage and the minimum value of the node voltage after the fault is removed; V th , T th Respectively represent the safety threshold of the voltage and the voltage below V after a fault occurs th The tolerable time, the typical value can be 0.8, 0.4s respectively; T mx_span...

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Abstract

The invention proposes a cooperative game-based reactive power optimization method with transient voltage safety constraints, which belongs to the field of power system transient voltage safety evaluation and control. This method first establishes a reactive power optimal power flow model with transient voltage safety constraints composed of objective functions and constraints; transforms the model into a cooperative game model between the safety party and the economic party, and makes decisions in turn by the two players in the game The model is solved by using the method to obtain the optimal operating point of the reactive power output of each generator and the optimal setting value of the transformer tap; for the time domain simulation of the solution result, the expected fault set is scanned, and the temporary faults of each node under each fault are calculated The quantitative evaluation index of state voltage safety; when the safety quantitative evaluation index of each node under all faults satisfies the transient voltage safety constraint, the reactive power optimization is completed. The invention has high solution efficiency, and the optimization result obtained by the invention can reduce the operation cost and ensure the safe and reliable operation of the power grid.

Description

technical field [0001] The invention belongs to the field of power system transient voltage safety evaluation and control, in particular to a cooperative game-based reactive power optimization method with transient voltage safety constraints. Background technique [0002] In recent years, with the high-voltage direct current transmission (HVDC) and large-scale new energy access to the grid, a large number of power electronic devices have appeared in the power system. These devices are sensitive to instantaneous voltage changes, causing the transient voltage problem of the system to become more and more more prominent. Once a short-circuit fault occurs in the system, it may cause serious accidents such as multiple DC continuous commutation failures or even blockages, new energy chain off-grid, and there is a risk of large-scale power outages. In order to improve the transient voltage safety level of the power system, a reactive power optimal power flow model with transient v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/50H02J3/16H02J3/06H02J3/36
CPCH02J3/381H02J3/466H02J3/50H02J3/16H02J3/06H02J3/36H02J2203/10H02J2203/20H02J2300/20H02J2300/40Y02E60/60Y02E40/30
Inventor 王彬崔惟郭庆来张振安孙宏斌单瑞卿葛怀畅林银鸿
Owner TSINGHUA UNIV