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Sensitivity analysis method for reactive power and voltage control for large-scale wind power

A sensitivity analysis and voltage sensitivity technology, which is applied in wind power generation, reactive power compensation, AC network voltage adjustment, etc., can solve problems such as spatial characteristic differences and system reactive power corresponding characteristics.

Active Publication Date: 2016-06-01
STATE GRID CORP OF CHINA +3
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the different access points of different wind farms, the corresponding characteristics of reactive power to the system are also different, and there are differences in spatial characteristics

Method used

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  • Sensitivity analysis method for reactive power and voltage control for large-scale wind power
  • Sensitivity analysis method for reactive power and voltage control for large-scale wind power
  • Sensitivity analysis method for reactive power and voltage control for large-scale wind power

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Embodiment Construction

[0058] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0059] Such as figure 1 as shown,

[0060] Step 1. Calculate the sensitivity equation of the system:

[0061] Let the generator power of node i in the power system be P Gi +jQ Gi , the load power is P LDi +jQ LDi , when the node voltage is expressed in polar coordinates, the power balance equation of the node is

[0062] ΔP i =P Gi -P LDi -U i ΣU j (G ij cosδ ij +B ij sinδ ij )=0

[0063] ΔQ i =Q Gi -Q LDi -U i ΣU j (G ij sinδ ij -B ij cosδ ij )=0(1)

[0064] Among them, P i is the active power injected into node i; Q i is the reactive power injected into node i; U i is the voltage of node i; G ij +jB ij is the admittance between nodes ...

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Abstract

The invention discloses a reactive voltage control sensitivity analysis method aiming at scaled wind power. The method comprises the following steps that a system sensitive equation is calculated; a Jacobi matrix including the studied node power or the voltage sensitivity information is calculated; the sensitivity control is carried out by aiming at the response features of each wind power plant. On the premise of ensuring the safe and economic operation of an electric network, the goals of greatly improving the receiving and sending capability of the electricity network on new energy sources, reducing the wind curtailment and improving the new energy online electricity quantity are achieved.

Description

technical field [0001] The present invention relates to the technical field of reactive power voltage control in the process of large-scale new energy power generation, in particular to a reactive voltage control sensitivity analysis method for large-scale wind power. Background technique [0002] Most of the large-scale new energy bases generated after my country's wind power enters the stage of large-scale development are located in the "three north regions" (Northwest, Northeast, and North China). Large-scale new energy bases are generally far away from the load center, and their power needs to be transmitted to load center for consumption. Taking Gansu Power Grid as an example, as of April 2014, the installed capacity of grid-connected wind power in Gansu Power Grid has reached 7.07 million kilowatts, accounting for about 20.2% of the total installed capacity of Gansu Power Grid (35 million kilowatts), becoming the second largest after thermal power. The main power source...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16H02J3/386H02J2203/20Y02E10/76Y02E40/30
Inventor 汪宁渤周强路亮黄华陟晶韩自奋徐陆飞冉亮腾贤亮
Owner STATE GRID CORP OF CHINA
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