High voltage DC transmission converter valve maximum transient test methods

A technology of high-voltage direct current transmission and test method, which is applied in circuit breaker testing, measurement of electricity, measurement of electrical variables, etc. The effect of favorable strategies, clear results, and simple and easy-to-implement methods

Inactive Publication Date: 2008-04-16
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are no similar public reports on the maximu

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  • High voltage DC transmission converter valve maximum transient test methods
  • High voltage DC transmission converter valve maximum transient test methods
  • High voltage DC transmission converter valve maximum transient test methods

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Embodiment Construction

[0018] Referring to Fig. 1, it shows the schematic circuit diagram of the maximum transient state test of the HVDC converter valve. In the figure, the DC current source Idc is composed of 6 pulse bridges, V 1 , V 4 , V 21 , V 22 Respectively represent the auxiliary valve, V t Represents the sample valve, C represents the resonant capacitor bank, L 1 is the resonant reactor, L 2 To protect the reactor, L H is a large current reactor, V dc stands for a DC voltage source. The specific connection method is: the DC voltage source V of the high voltage circuit dc The anode output is connected to the voltage source auxiliary valve V 1 anode, V 1 The cathode of the protective reactor L is connected in series 2 After and resonant reactor L 1 One end of the resonant capacitor C is connected, the other end of the resonant capacitor C is connected to the cathode of the DC voltage source, and the other end of the resonant reactor is connected in series with an antiparallel reso...

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Abstract

The invention discloses a method for testing the maximum transient state of a high-voltage direct current transmission thyristor valve, belonging to the power electronic system field, wherein the synchronous voltage of the test is the input voltage of a big-current source; the working sequence of the test is determined by the sync signals; steps in a test cycle T include: triggering valves V1 and V2 at the time of t1 to perform the energy replenishment of a testing circuit and to simulate the dv/dt intensity for a test valve Vt under the working condition of the maximum transient state; triggering and conducting a valve V1 and a valve Vt at the time of t2; triggering a valve V21 at the time of t3 and performing the first pulse injection; performing the first current injection to the test valve by use of a capacitor C, with the valve V4 completing zero-crossing switching during a period from t3 to t4; triggering a valve 22 at the time of t4; triggering the valve V1 and the valve V21 at the time of t5; triggering the valve Vt and V21 and performing the second current injection at the time of t6; and triggering the a valve V22 at the time of t7.

Description

technical field [0001] The invention belongs to the field of power electronics and power systems, and in particular relates to a maximum transient test method for a high-voltage direct current transmission converter valve. Background technique [0002] With the gradual promotion of the application of HVDC technology in the power system, the reliability of its core component, the HVDC converter valve, in the power system has become the key to the safety of the system. The operation test, which is a process of rigorous scientific inspection of the performance of the valve in advance, is related to the design and manufacturing level of the HVDC converter valve and an important means to improve its reliability. At present, the synthetic test method is widely used in the world to carry out the operation test of HVDC converter valves. The basic idea is to use two sets of power supply systems to provide high current and high voltage strength for the thyristor valve respectively, t...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/333
Inventor 查鲲鹏温家良汤广福贺之渊
Owner CHINA ELECTRIC POWER RES INST
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