A reactive power planning method for wind power grid-connected system considering static transient voltage stability

A technology of transient voltage and static reactive power compensation, applied in reactive power compensation, reactive power adjustment/elimination/compensation, wind power generation, etc., can solve problems such as system voltage instability, economic efficiency to be improved, and collapse

Active Publication Date: 2018-12-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

However, when the above-mentioned technology fails in the high-penetration wind power grid-connected system, the random wind pow

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  • A reactive power planning method for wind power grid-connected system considering static transient voltage stability
  • A reactive power planning method for wind power grid-connected system considering static transient voltage stability
  • A reactive power planning method for wind power grid-connected system considering static transient voltage stability

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Embodiment Construction

[0082] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0083] The invention relates to a method for reactive power planning of a wind power grid-connected system considering static transient voltage stability, such as figure 1 As shown, the method includes the following steps:

[0084] Step 1. Input generator, wind turbine operating parameters and wind farm, wind speed, system data.

[0085] Step 2. Divide the load probability density and wind speed Weibull distribution into different scenarios, obtain the comprehensive scenario probability and corresponding load and wind power output expectations, and determine the way wind farms participate in reactive power planning.

[0086] There is uncertainty in the load in the system, usually the load conforms to the following figure 2 The normal distribution shown, and its probability density function is divided into several intervals, and each interv...

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Abstract

The invention relates to a reactive power planning method of wind power grid-connected system considering static transient voltage stability, load probability density and wind speed Weibull distribution is divided into different scenarios, a reactive power programming model of the wind power grid-connected system is established by using a two-layer programming method and solved by Gaussian inverselearning particle swarm optimization algorithm. The static reactive power compensation equipment capacity of the optimal static reactive power compensation node and the dynamic reactive power compensation equipment capacity of the dynamic reactive power compensation node of wind power grid-connected system are outputted. Compared with the prior art, the invention has the advantages of reducing the cost of network loss and reactive power compensation, and improving the static transient voltage stability of the system under different operation states.

Description

technical field [0001] The invention relates to the technical field of wind power grid-connected systems, in particular to a reactive power planning method for wind power grid-connected systems considering static transient voltage stability. Background technique [0002] With the continuous expansion of the scale of wind farms, the randomness and volatility of its output have a non-negligible impact on the voltage stability of the access system. Large-scale wind power access may cause system voltage instability or even voltage collapse. Usually, voltage collapse is related to insufficient reactive power of the system, and reactive power planning that only considers static and transient voltage stability cannot meet the requirements of system operation economy and safety at the same time. Therefore, it is necessary to carry out reactive power planning considering static transient voltage stability for wind power systems to improve system operating conditions. [0003] The g...

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Application Information

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IPC IPC(8): H02J3/38H02J3/46H02J3/18
CPCH02J3/386H02J3/18H02J3/46Y02E10/76Y02E40/30
Inventor 赵晶晶朱仁杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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