A distributed power flow control method and system

A power flow control and distributed technology, applied in the direction of AC networks with the same frequency from different sources, etc., can solve the problems that the sub-control units cannot coordinate with each other, the sub-control units cannot be controlled in batches, and the flexibility is poor.

Inactive Publication Date: 2019-01-18
NARI TECH CO LTD +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Each sub-control unit of the existing DPFC distributed power flow controller is independently controlled according to the preset strategy. In this control mode, the sub-control units cannot coordinate and cooperate with each other, and the control flexibility is poor. batch control

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  • A distributed power flow control method and system
  • A distributed power flow control method and system
  • A distributed power flow control method and system

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0066] Such as figure 1 As shown, in the DPFC system of this embodiment, a main control unit is deployed in the substation, and the controlled transmission line is a three-phase line, including phase A, phase B, and phase C. On the transmission line, each strain tower is provided with a group of sub-control units. Assuming there are n strain towers, there are n groups of sub-control units correspondingly, and each group of sub-control units includes the installation on the phase A line The A-phase sub-control unit, the B-phase sub-control unit installed on the B-phase line, and the C-phase sub-control unit installed on the C-phase line on the transmission line. The number of sub-control units in...

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Abstract

The invention discloses a distributed power flow control method and system. A main control unit is arranged in a substation, and a plurality of sub control units are installed on a transmission line.The main control unit calculates the total adjustable capacity of all the sub control units and the total control capacity required by the transmission line. Then, the total actual control capacity isdetermined, and the reactive power voltage required by the single-phase line is calculated according to the total actual control capacity, and the reactive power voltage is distributed to each sub-control unit as its target voltage. The target voltage of each sub-control unit is sent down to the corresponding sub-control unit, so that each sub-control unit injects reactive voltage into the transmission line according to the target voltage, and if the power flow does not reach the target value, the above process is repeated for cyclic control. The main control unit arranged in the substation centrally controls the sub control units distributed on the transmission line so as to realize the power flow control of the transmission line.

Description

Technical field [0001] The invention relates to the technical field of power system power flow control, in particular to a distributed power flow control method and system, which is used for distributed flexible AC power transmission control of the power system. Background technique [0002] For a long time, the power system has mainly adopted new power plants and transmission lines to improve the power flow distribution of the system, but new power plants and transmission lines need to occupy a lot of valuable land resources, and the construction cost is high and the construction period is long. Therefore, people have proposed the idea and plan of using power electronic technology to transform and upgrade existing lines, that is, the Flexible AC Transmission System (FACTS), to achieve the purpose of controlling the power flow of the system, improving the stability of the system and the transmission capacity. The centralized large-scale FACTS equipment has a complex structure, la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 朱开阳陈汹钟亮民封科赵静波
Owner NARI TECH CO LTD
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