Novel thyristor-grade impedance testing device for direct-current converter valve

A DC converter valve, thyristor-level technology, applied in the direction of measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve the problems of not reflecting the thyristor-level working conditions, inefficiency, complicated operation process, etc., to achieve test The device is convenient and quick, easy to realize, and the effect of cumbersome steps

Active Publication Date: 2011-08-17
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional test method for thyristor-level impedance is relatively simple, and most of them use multimeters, capacitor bridges, etc. to directly test the thyristor-level damping resistance, damping capacitance, DC voltage sharing resistance, etc.
This method is cumbersome, time-consuming, and inefficient to operate. Most importantly, this method cannot provide an excitation source and cannot reflect the working conditions of the thyristor stage during actual operation. This invention proposes a novel Using the bus method to achieve
[0005] Chinese patent application CN200910241741.8 discloses the use of impedance tester LCR unit to complete the measurement of damping resistance, damping ca

Method used

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  • Novel thyristor-grade impedance testing device for direct-current converter valve
  • Novel thyristor-grade impedance testing device for direct-current converter valve
  • Novel thyristor-grade impedance testing device for direct-current converter valve

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Embodiment Construction

[0022] The technical scheme of the present invention is as attached figure 1 As shown, the impedance test method is composed of three parts: a test system, a thyristor-level test object, and a control and display system. The testing system applies the test excitation power to the thyristor-level test product, wherein the positive pole of the DC power supply is added to the anode of the thyristor, and the cathode of the thyristor is grounded. The test system selects the test items by receiving the test command from the control display system, and uploads the test results to the control display system.

[0023] see figure 2 , the excitation source applied to the thyristor-level test object of the test system is composed of three excitation sources: DC, 100Hz AC source, and 10kHz AC source. By applying the three excitation sources to the thyristor-level test object respectively, the two The voltage at the terminal and the current flowing through the thyristor-level test object...

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Abstract

The invention provides a novel realization method for testing thyristor-grade impedance. According to the method, the testing reliability, the testing precision and the testing efficiency can be improved effectively. By adopting the testing system, the direct-current voltage, and the alternating-current voltages of 100Hz and 10kHz are acted on the thyristor-grade sample; subsequently the thyristor-grade voltage and thyristor-grade current can be measured; the impedance is calculated; and the testing result can be transmitted to a controlling and displaying system by a CAN bus, thus facilitating the judgment on the testing results.

Description

technical field [0001] The invention relates to the field of power system devices, in particular to a novel thyristor-level impedance testing device for DC converter valves. Background technique [0002] As the most basic unit of the converter valve, the thyristor stage may encounter various operating conditions in the actual operation process. This experimental method simulates the three main operating conditions, and the influence of the external source of DC, power frequency and impact Thyristor stage damping loop parameters below. By using the impedance test system, apply DC, 100Hz, and 10kHz excitation sources to the thyristor-level test products, respectively test the thyristor-level impedance values ​​under these three sources, and compare with the calculated values. If it is within the required error range If within, the thyristor-level test product is considered qualified, otherwise it is considered unqualified. [0003] The thyristor-level circuit is the most bas...

Claims

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Application Information

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IPC IPC(8): G01R27/08
Inventor 查鲲鹏陈龙龙张娟
Owner CHINA ELECTRIC POWER RES INST
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