Control and protection system of converter valve operating test device

Abstract

The invention provides a control and protection system suitable for a composite type converter valve operating test device, belonging to the field of automation equipment of electrical power systems. The system comprises a man-machine interface unit, a synchronizing unit, a signal acquisition unit, a data summarization unit, a regulation unit, a protection unit, a waveform recording unit, a waveform monitoring unit, a discrete input (DI) unit, a discrete output (DO) unit, a valve base electronic (VBE) unit, a direct current (DC) heavy current power supply system controller, a high-voltage power supply system controller, an inrush current circuit controller, an impact circuit controller, a test valve water system controller and a test device water system controller, wherein the control and protection system can control a test valve and an auxiliary valve according to a trigger time sequence as required so as to generate voltage, current and heat intensity required by various operating tests to finish the operating tests of a converter valve. The system can also monitor the on-off state and important analog quantity parameters of a main circuit so as to take protection measures in time when abnormal conditions appear.

Description

technical field [0001] The invention relates to the field of electric power system automation equipment, in particular to a control and protection system suitable for a synthetic converter valve operation test device. Background technique [0002] The high-voltage direct current transmission HVDC converter valve operation test device is used to test the performance of the valve under the worst operating conditions and fault conditions, and is the necessary equipment to complete the type test of the converter valve. The converter valve consists of multiple thyristors connected in series or in parallel. At present, the rapid increase of single thyristor voltage and current tolerance makes the electrical tolerance of the converter valve also increase. This puts forward higher requirements for the running test device. In order to reduce the capacity of the device, the synthesis method is usually used in the world to complete the operation test. The basic idea is: pass the high...

AI Technical Summary

Problems solved by technology

[0005] (2) Different control functions

[0006] (3) Different protection functions

The control and protection system of the patent CN100392419C adopts a hierarchical structure, which is clearly divided into three levels. In the third level, various control and protection subsystems have no clear and direct connection with the "operating console" and "wave recorder"

Images