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Secondary voltage control method of hybrid multi-infeed direct current system

A secondary voltage control and multi-feed DC technology, which is applied in the direction of AC network voltage adjustment, AC network circuits, circuit devices, etc., can solve the problems of complex control methods and difficulties in online coordination and control of voltage and reactive power, and achieve a wide range of applications Effect

Active Publication Date: 2017-08-18
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the pure AC system, the voltage stability problem of the multi-infeed DC receiving-end AC system is more prominent, mainly manifested in the diversification of reactive power resources, complex control methods, and most control equipment relying only on local information for control, etc., resulting in There are many difficulties in realizing the online coordinated control of voltage and reactive power in the AC system at the receiving end

Method used

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  • Secondary voltage control method of hybrid multi-infeed direct current system
  • Secondary voltage control method of hybrid multi-infeed direct current system
  • Secondary voltage control method of hybrid multi-infeed direct current system

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Embodiment 1

[0072] In this embodiment, the hybrid doubly-fed DC calculation system is taken as an example to further describe the specific implementation process of the present invention. The hybrid doubly-fed DC system contains 1 circuit of LCC-HVDC and 1 circuit of VSC-HVDC and 2 synchronous generators. Please refer to the detailed topology image 3 . The specific implementation process of this embodiment includes:

[0073] 1) Obtain the topological information of the power grid, including the network structure diagram and information of power plants and DC converter stations, and determine the set C of regional central points.

[0074] Such as image 3 As shown, in this embodiment, each DC feed-in commutation busbar is selected, and the busbar on the high-voltage side of the generator is the central point:

[0075] C={node 1, node 2, node 3, node 4}

[0076] 2) According to the power flow equation of the whole network, the sensitivity matrix of the hub voltage with respect to reac...

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Abstract

The invention discloses a secondary voltage control method of a hybrid multi-infeed direct current system. The method comprises the steps of selecting a central point bus set participating in secondary voltage control, obtaining a sensitivity matrix of central point bus voltage to reactive power according to a power flow equation of a whole network, establishing a secondary voltage control model according to the sensitivity matrix, solving the secondary voltage control model to obtain reactive regulation quantity of controlled synchronous generators, high-voltage direct current convertor stations and other central points, and performing the secondary voltage control according to the reactive regulation quantity. The method can realize on-line coordination control of secondary voltage of the hybrid multi-infeed direct current system.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a method for controlling the secondary voltage of a hybrid multi-infeed DC system. Background technique [0002] The three-level voltage control mode is a power system voltage control mode commonly used in the world. It has been implemented in France, Italy, Spain, Belgium, Brazil and other countries. Most of the domestic provincial grids have also been put into operation and achieved good results. . In this mode, the main goal of the secondary voltage control is to reset the setting values ​​of the automatic voltage regulators of the primary voltage control layer in the area with a certain coordinated strategy, so that the voltage value of the central point deviates from the tertiary voltage control The reference value of the pivot point voltage set by the layer is within the acceptable range. The secondary voltage control is the key link connecting the other two levels. Fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/36
CPCH02J3/16H02J3/36H02J2203/20Y02E40/30Y02E60/60
Inventor 唐敏马琳琳武诚王小波李新张冰王亮管荑吴金玉晋飞马强刘晓亮王娟娟卢晓惠宋战慧李国强刘贯红黄海丽李俄昌褚晓东
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY
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