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A Design Method of Series Compensation with Adjustable Rated Parameters

A technology of rated parameters and design methods, applied in the field of long-distance power transmission, can solve problems such as adverse effects on reliability, inability to adapt to overvoltage protection devices, engineering waste, etc., and achieve the effect of improving economy and reliability.

Active Publication Date: 2019-02-22
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0010] ①: In the process of series compensation design, long-term system conditions, such as power grid structure, transmission flow, etc., are difficult to accurately estimate. The current practice is to select the rated current according to the long-term plan and consider a large margin, and build it in one go at the initial stage. If the actual power flow level of the system in a certain period or even the entire equipment cycle is significantly lower than the design level, it will be a huge waste for the project, and it may also have an adverse effect on reliability due to the large number of components
[0011] ②; Although a large margin is considered in the design, the system conditions may change unexpectedly. At this time, the series compensation and its overvoltage protection device are often unable to adapt, and still need to be modified

Method used

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  • A Design Method of Series Compensation with Adjustable Rated Parameters
  • A Design Method of Series Compensation with Adjustable Rated Parameters
  • A Design Method of Series Compensation with Adjustable Rated Parameters

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Embodiment Construction

[0052] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0053] An embodiment of a series compensation design method with adjustable rated parameters provided by the present invention is as follows: figure 1 As shown, specifically:

[0054] 1. Determine the development stage of the power system where the series compensation device is located.

[0055] In this embodiment, the development stages of the power system are divided into a first development stage and a second development stage according to the order of operation time after the power system is put into operation, that is, shor...

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Abstract

A determination method for a series compensation device having an adjustable rated parameter comprises: determining a development stage of a power system in which a series compensation device is located (201); determining a rated current and a rated capacitive reactance of the power system for different development stages in which the power system requires the series compensation device to perform compensation (202); optimizing the rated parameters of the series compensation device for the different development stages (203); determining a means of expanding a capacitor of the series compensation device of the power system for the different development stages (204); and determining a parameter and expansion means of an overvoltage protection device of the series compensation device (205).

Description

technical field [0001] The invention relates to the technical field of long-distance power transmission, in particular to a series compensation design method with adjustable rated parameters. Background technique [0002] Series compensation technology can increase the transmission capacity of long-distance power transmission system and improve system stability. Series compensation has broad application prospects in power systems. In series compensation, capacitors are used to compensate the line impedance, thus improving the stability of the system. But during a transient, the short circuit current will cause a high voltage across the capacitor bank. Capacitors have a limited ability to withstand overvoltage, which must be limited to a certain level specified. Therefore, it is also necessary to install a certain overvoltage protection device. "MOV-parallel gap combination" is currently a widely used and mature overvoltage protection technology. figure 1 The wiring diagra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCH02J3/18Y02E40/30
Inventor 韩彬班连庚项祖涛杜宁宋瑞华王晓彤郑彬张媛媛韩亚楠周佩朋杨大业马其燕
Owner CHINA ELECTRIC POWER RES INST
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