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Method for measuring electric power in HVDC system

A measurement value and power conversion technology, applied in the direction of measuring electrical variables, measuring resistance/reactance/impedance, measuring devices, etc., can solve problems such as large error range, installation cost, and large measurement error range of transformers

Inactive Publication Date: 2016-08-17
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when measuring ultra-high voltage, the transformer installed in the HVDC system has a large measurement error range, and likewise in the case where multiple transformers are installed at several locations, the error range caused by the measurement error of each transformer No choice but to get bigger
[0010] More accurate sensing devices have also been used to solve this problem, but the use of more accurate sensing devices brings installation cost issues and some technical problems

Method used

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  • Method for measuring electric power in HVDC system
  • Method for measuring electric power in HVDC system
  • Method for measuring electric power in HVDC system

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Embodiment Construction

[0044] Advantages and features of the present invention, as well as embodiments thereof, will become apparent by the following examples with reference to the accompanying drawings.

[0045] However, the invention may be embodied in different forms and should not be construed as limited to the described embodiments. Rather, these embodiments are provided so that this disclosure will be thorough and thorough, and will fully convey the scope of the invention to those skilled in the art. Further, the application is limited only by the claims. Wherever the same reference numbers designate the same or similar parts throughout the drawings.

[0046] In the description of the embodiments of the present invention, when it is determined that a related known function or configuration of the detailed description would unnecessarily obscure the gist of the present invention, the detailed description will be omitted. The terms used below are defined in consideration of their functions in ...

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Abstract

A method for measuring electric power value in a HVDC system comprises the steps of receiving current values and voltage values, which are measured from sensor group installed in specific positions of an electric power conversion station; identifying a line impedance of the positions where the sensor group are installed; calculating a first electric power value of the electric power conversion station; calculating a second electric power value of the electric power conversion station; calculating a third electric power value of the electric power conversion station; and determining one of the second and third electric power values as an actual electric power value of the electric power conversion station by comparing the calculated first to third electric power values with one another.

Description

technical field [0001] The present invention relates to a high voltage direct current (HVDC) system (hereinafter abbreviated as "HVDC"), and more particularly, to a method of calculating a power value by using values ​​measured by a voltage sensor and a current sensor. Background technique [0002] The HVDC system refers to a power transmission system in which a power transmitting station converts AC power generated by a power station into DC power for transmission, and a power receiving station converts the DC power back into AC power for supply. [0003] HVDC system is applied to submarine cable power transmission, large-capacity long-distance power transmission, AC power grid interconnection, etc. Likewise, the HVDC system enables interconnection of grids with different frequencies as well as asynchronous interconnection. [0004] The power transmission station converts AC power to DC power. That is, since the state of transmitting AC power or the like using submarine c...

Claims

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Application Information

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IPC IPC(8): H02J3/36G01R21/06
CPCG01R21/06H02J3/36G01R11/34G01R27/08G01R21/133
Inventor 崔用吉崔皓硕
Owner LSIS CO LTD