On-line monitoring system and monitoring method for cold water in convertor station

Abstract

The invention relates to an on-line monitoring system and a monitoring method for cold water in a convertor station. The system comprises a sampling system, a constant temperature system, a data acquisition and analysis system and a transmission system, wherein the sampling system is used for acquiring circulating water from a main circulating pipeline of the cold water in the convertor station, wherein the circulating water is used as sampling water; the constant temperature system is used for keeping the temperature of sensors of a measurement system within constant temperature; the data acquisition and analysis system is used for arranging all the sensors in the sampling water in the constant temperature system, transmitting information acquired by the sensors to a data analysis system through transmission lines and performing operational analysis; and the transmission system is used for transmitting results of the data acquisition and analysis system to a remote client through a network. The on-line monitoring system and the monitoring method have the following advantages that: a core test module can be replaced and the quantity of the sensors can be increased according to specific test content; and manual intervention is not required, various indexes of the cold water in the convertor station can be regularly monitored in real time, and the basis of establishing the optimal operating conditions of a circulation system of the cold water in the convertor station is provided.

Description

technical field [0001] The invention belongs to the field of water quality analysis, and relates to on-line monitoring of scaling influencing factors in internal circulating cooling water of a DC converter station, in particular to an online monitoring system and monitoring method for internal cooling water in a converter station. Background technique [0002] Since DC transmission has the characteristics of long transmission distance, large transmission capacity, and flexible control, it is an important task for the development of the electric power industry, and it is an important link in the realization of my country's "West-to-East Power Transmission" strategic plan. With the rapid development of the national economy, DC transmission technology is also constantly improving. DC transmission is mainly composed of converter stations (rectifier stations and inverter stations), DC lines, power filters on the AC side and DC side, reactive power compensation devices, converter ...

AI Technical Summary

Problems solved by technology

Scaling of the water cooling system of the converter station is one of the most important factors affecting the normal operation of the DC transmission system at present. For example, when the internal cooling water flows through the equipment, it is easy to cause corrosion, scaling and heat generation of the equipment, which will eventually lead to leakage of the internal cooling water and blockage of the equipment or heating of the equipment. severe emergency shutdown

Up to now, there have been many DC blockage or emergency outage accidents caused by internal cooling water problems at home and abroad, which have seriously affected the stability of the DC transmission system.

[0003] At present, the offline method is generally used to monitor the water quality of the cold water in the converter station, that is, to regularly go to the converter station to take water samples and then go to the laboratory to test the pH value, conductivity and hardness of the water samples taken. There is no complete set Cooling water online monitoring system in converter station

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