Analysis of Demand of Auxiliary Machinery Industry in Kingview Power Plant

The electric power industry is a basic industry for national economic construction. It is also a technology-intensive and capital-intensive industry. It is closely related to the development of the national economy and the people’s lives. In recent years, with the rapid economic growth in China, the demand for electricity has soared and the power industry in China has developed rapidly. Thermal power generation, especially coal-fired power generation, will continue to play a leading role for a long time to come. At the end of 2006, the country’s installed power generation capacity reached 622 million kilowatts, ranking second in the world. Among them, thermal power is 480.05 million kilowatts, accounting for 77.82% of the total capacity.

With the continuous improvement of the operation and management level of large-scale thermal power units and the development of thermal power generating units to high-parameter and large-capacity power plants, people have paid more and more attention to modernized thermal power plants based on automation technology, control technology, computers and communication technologies. Automation technology has been vigorously promoted, which has promoted the development and construction of power plants. Power automation has become an indispensable part of the power industry's production management and industry development.

The auxiliary engine system of the thermal power plant is closely related to the production process of the power plant. Their normal operation is an important condition for ensuring the stable and full generation of the unit. Therefore, it is very important to monitor the auxiliary machine system reliably and effectively. Boilers, steam turbines and generators are the main equipment in thermal power plants, also known as the three mainframes. The devices that work in conjunction with the three major hosts are called auxiliary devices or auxiliary devices. Auxiliaries and their associated pipelines and lines constitute auxiliary systems. The auxiliary system of thermal power plants is mainly composed of three independent automation subsystems, which are the coal transportation, water, and ash removal subsystems. These systems work in coordination with the main system and they cooperate with each other to complete the production of electrical energy.

At present, large and medium-sized thermal power plants in China have connected the various control systems into three regional control points for water, coal, and ash via the network to achieve centralized monitoring. On this basis, all systems in the entire plant are connected into a large network. The unit control room set up the auxiliary machine monitoring operator station and realized the centralized monitoring of the auxiliary machinery of the whole plant. Usually the topology of the auxiliary monitoring network is divided into three layers, as shown in the following figure:

The bottom layer is the PLC host I/O station, the middle level backbone network is the real-time monitoring communication network between the PLC and the industrial control upper computer, and the uppermost layer is the host computer information exchange communication network. The basic structure of the coal conveying system, the water system and the ash removal system is the same, except that the number of IO points in each system is different.

Coal Power Plant Control System Solution

Background introduction

Monitoring system function: