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Reactive-load compensation equipment configuration method for large-scale wind power delivery system

A technology of compensation equipment and configuration method, applied in reactive power compensation, reactive power adjustment/elimination/compensation, flexible AC transmission systems, etc., and can solve problems such as partial optimism

Active Publication Date: 2013-11-27
PLANNING EVALUATION CENT SHAANXI ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method often leads to double counting of the low-capacity compensation capacity in the substation, so it is easy to draw an optimistic conclusion; and this method is powerless when dealing with network structures

Method used

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  • Reactive-load compensation equipment configuration method for large-scale wind power delivery system
  • Reactive-load compensation equipment configuration method for large-scale wind power delivery system
  • Reactive-load compensation equipment configuration method for large-scale wind power delivery system

Examples

Experimental program
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Effect test

Embodiment 1

[0108] Figure 4 It is a schematic diagram of the 750kV second channel of Xinjiang and the Northwest main network, and the configuration scheme of the line high voltage reactor is marked in the figure. The full line high resistance compensation of the second channel is 84%.

[0109] Firstly, the capacitive reactive power demand of each substation in the network channel is analyzed, and the reactive power hierarchical partition method proposed in the invention is adopted, and the heavy load mode of the power flow in 2015 is considered, and the reactive power demand under the N-1 mode of line heavy load is considered. Table 4, Table 5, and Table 6 show the reactive power loss of transformers in each substation of the second channel of the network under the heavy load mode in 2015, the reactive power loss of each line, and the capacitive reactive power demand of each substation. Further, considering the reactive power demand of each line N-1 of the second channel under the heavy...

Embodiment 2

[0138] Analyze the inductive reactive power demand of each substation in the network channel. According to the demand analysis method proposed by the invention, that is, 100% compensation for the charging power of the newly added lines of the project. Considering the no-load mode in 2015, the inductive reactive power deficit of each line of the second network channel is shown in Table 9 below, and the inductive reactive power demand of each station is shown in Table 10 below.

[0139] Table 9 Inductive reactive power deficit of each line of the second channel

[0140]

[0141] Table 10 Inductive reactive power demand of each station in the second channel

[0142]

[0143] According to Table 10, there are inductive reactive power demands in Hami Station, Hami South Station, Dunhuang Station, Shazhou Station, and Qaidam Station in the second channel of Xinjiang and Northwest Main Network, and there are inductive reactive power demands in Hami Converter Station and Yuka St...

Embodiment 3

[0159] Analyze the voltage regulation effect of reactive power compensation configuration. Under the heavy load mode in 2015, considering wind power fluctuations, the typical output of wind farms in June was used as an example to carry out simulation calculations, as shown in figure 2 shown. The initial input of the four groups of 390Mvar controllable high resistance of the Shazhou-Yuka two-circuit line is its maximum capacity, that is, 390Mvar. When the wind power output changes, the four groups of controllable high-resistance lines of the Shazhou-Yuka line are switched simultaneously according to the voltage regulation, so as to ensure that the operating voltage of the 750kV side of each station in the system is within the range of 750kV~790kV. Once the voltage is lower than 750kV, the four groups of controllable high resistance are cut off; once the voltage is higher than 790kV, the four groups of controllable high resistance are switched on. At the same time, during the...

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Abstract

The invention belongs to the field of power systems, in particular to a reactive-load compensation equipment application scheme for large-scale wind power delivery system. As for the large-scale wind power delivery system, the invention, aiming to meet the needs of power delivery and wind power access, through reactive power balance analysis in different level years and under different operation modes, provides the capacitive and inductive reactive power demands of each substation in the system, and provides a configuration scheme for low pressure side fixed switching reactive compensation equipment such as capacitors, reactors and the like and dynamic reactive-load compensation equipment such as controllable reactors, static var compensators and the like. The provided configuration scheme can ensure voltage at each point in the system is controlled within a reasonable range under different operation modes, and meanwhile the dynamic reactive-load compensation equipment can meet the requirements of reactive power control of the grid and the voltage under wind power fluctuations with a strong engineering adaptability.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for configuring reactive power compensation equipment of a large-scale wind power external transmission system. Background technique [0002] At present, the problem of dynamic reactive power compensation caused by wind power active power fluctuations is particularly prominent. Proposing a reasonable and feasible reactive power compensation configuration scheme for each substation in the second channel project is very critical to ensure that the voltage at each point in the system is controlled within a reasonable range under different operating modes and wind power fluctuations. [0003] In the 750kV system, it is the first time in China to adopt the method of layering and partitioning for reactive power balance analysis. The currently commonly used reactive power balance analysis method is generally only for chain power transmission projects, with the section-by-section l...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCH02J3/18Y02E40/30H02J3/1821H02J3/1835H02J3/1864H02J3/1871H02J2300/28H02J3/381Y02E10/76Y02E40/10Y04S20/222Y02B70/3225H02J3/50
Inventor 喻新强王雅婷王劲武申洪孙强周勤勇王中阳秦晓辉郑楠
Owner PLANNING EVALUATION CENT SHAANXI ELECTRIC POWER
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