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Method for measuring power in hvdc systems

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

Inactive Publication Date: 2019-05-17
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 power in hvdc systems
  • Method for measuring power in hvdc systems
  • Method for measuring power in hvdc systems

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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 of measuring a power value in a high-voltage direct current system, the method comprising the steps of: receiving a current value and a voltage value, which are measured by a sensor group installed at a specific location of a power conversion station; identifying line impedance at the location where the sensor group is installed ; calculating a first power value of the power conversion station; calculating a second power value of the power conversion station; calculating a third power value of the power conversion station; and by combining the calculated first power value, the second The power value and the third power value are compared with each other to determine one of the second and third power values ​​as the actual power value of the power conversion station.

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