Electrical automation system of domestic waste incineration power plant

Release time:

2022-08-09

Taking the construction project of electrical automation system of a municipal solid waste incineration power plant as an example, this paper analyzes the construction of electrical automation system

Introduction: the municipal solid waste incineration power plant takes the electrical system as the main operation power, effectively converts the heat energy generated in the process of waste incineration into electric energy, and uses the way of waste incineration for power generation, which is in line with the relevant regulations of the urban environmental protection department, and speeds up the realization of the goal of the integrated construction of the electric and gas system of the waste incineration power plant.

1、 Overview of electrical automation system

Power plant electrical automation refers to the organic combination of equipment monitoring, detection, operation and maintenance in domestic waste incineration power plant to gradually form the operation mode of modern electrical automation system. At present, most waste incineration power plants in China are mainly distributed control systems, which flexibly apply modern electronic monitoring and equipment detection technology to realize real-time monitoring of electrical equipment of power plants and ensure the normal and stable operation of relevant equipment of power plants. The electrical automation system in the domestic waste incineration power plant is mainly composed of three parts: one is the compartment layer, that is, the form of layered interval is adopted, and the current protection device is set at the switch. Once a certain equipment fails, the relevance between the equipment and other electrical equipment is reduced to ensure the independence of electrical equipment operation; The second is the communication layer, which uses modern mobile communication technology to realize the information and data transmission during the operation of electrical system equipment through information exchange system and communication device; The third is the control layer, which mainly includes relay protection system, equipment monitoring system and remote control system. The base station is used to send control information to the system to automatically adjust the operation state of electrical equipment and realize the automatic operation of electrical system.

2、 Construction analysis of electrical automation system in domestic waste incineration power plant

（1） System design

1. Main wiring design

The domestic waste incineration power plant adopts the electrical automation system to carry out relevant work. Through the monitoring and measurement of the electrical equipment and operation lines in the plant, the real-time monitoring of the operation state of the electrical system is realized to improve the operation efficiency and quality of the system. The waste classification incineration power plant is mainly composed of electrical equipment. According to the number of waste incineration in the city, it is expected to install two waste incineration equipment and one steam turbine generator. Combined with the outlet voltage of the generator, the electrical equipment circuit is optimized [1].

2. Switch port design

In order to realize the effective control of the electrical system, during the system construction, technicians should use professional knowledge to design the switch port of the electrical automation system, start from the network monitoring room, enter the Monitoring simulator, connect with RTU, use the centralized control interface switch to transmit signals to the control room, and adopt the standard 6kV switch under the voltage environment of rated voltage of 55v, Technicians should test the response speed of the switch, add relay protection devices, and use the remote control system to control the switch port of the system.

（2） Configuration and function

1. Main and sub station functions

The operation of electrical automation system is inseparable from the main station and sub station. During the application period, the main station forms an integrated and open equipment operation environment through the network operating system, and fully applies and gives full play to the system functions of the main station in communication, display, remote control and so on based on modern technology. First of all, the master station has powerful communication function and works with the proximitor as the core. During the operation of electrical equipment, the proximitor widens the operation channel and controls the data communication speed in different channels. Using the monitoring and alarm function of the proximitor, the on-line control of RTU switch port and the automatic conversion between the main channel and other channels are realized. At the same time, the system includes the scheduler and uses the remote control device, Complete the collection of relevant information and data, and transmit information through the remote control terminal; Secondly, the main station of the system has the display function. Technicians set CRT in the workstation to centrally display and monitor the running track of mobile devices through man-machine conversation. In the application process, they can expand and extend the functions of the electrical automation system. Through the accident simulation function, they can carry out the system optimization design experiment to further improve the speed and quality of system operation, Ensure the authenticity and accuracy of equipment operation data information; Finally, the substation system adopts the Distributed installation method and uses the network information technology to realize the real-time transmission of the operation information of the main station equipment, optimize the operation space of the substation system and further improve the operation effect of the communication control system.

2. Software and hardware configuration

During the construction of electrical automation system, technicians use different software systems and hardware facilities to optimize the internal configuration of the system. The main goal of software configuration is to set the switch interface of control system, and monitor the operation status of electrical equipment by using electronic system platform software, SCADA software and corresponding management software, including computer operation main system and service system, so as to form an automatic equipment management mode. According to the instructions of the master control station, the master control station is equipped with the core equipment of the SCADA system, and the corresponding hardware of the master control station is configured to give full play to the corresponding work conditions of the master control station. In addition, technicians should set the workbench in the centralized control room, expand the system hard disk through BTG disk, collect and sort out electrical equipment and relevant information by RTU, and transmit information through electronic equipment, so as to gradually promote the automation process of electrical system construction.

2. Main and sub station functions

（3） System composition

1. Relay protection system

The normal operation of the electrical automation system has a direct impact on the line voltage and circulating current of electrical equipment. The system construction personnel are required to strengthen the control and management of voltage and current, and complete the relay protection of system lines, steam turbine generators and other equipment by adding relay protection devices. The waste incineration power plant system operates in a low-voltage environment. Relevant technicians use low-voltage transformers and 10kV lines to comprehensively protect the current circuit and improve the safety and stability of the current environment. During use, the relay protection device should form a supporting device with high and low-voltage switchgear, which has a certain transmission capacity for short-distance signals and meets the basic conditions and technical requirements for the operation of electrical equipment in the power plant.

2. Centralized control system

During the operation of electrical equipment of municipal solid waste incineration power plant, it is necessary to establish corresponding control room or control system for supervision. Technicians apply automatic control skills and regulation skills to the construction of centralized control system, install corresponding protection and measuring devices, and complete the effective monitoring of steam turbine generator, transformer and corresponding power distribution devices in the plant. During the period, relevant personnel should pay attention to the management and division of system monitoring scope, Use the monitoring system to closely monitor the ups and DC current system, and transmit key information and data when necessary. The centralized control system mainly includes DCS system and network switching equipment. The public measurement and control device and communication interface device are used to realize the remote scheduling of system operation. The technicians use GPS docking device to locate the relevant data information in real time, and the centralized converter is used to complete the conversion and transmission of equipment operation information, so as to ensure the good effect of system control.

3. Automation device

Automation device is an important device in the electrical system, mainly including generator set, automatic quasi synchronization device, automatic alarm system and fault recording system. During the operation of electrical equipment, the generator set provides electric power, and the automatic quasi synchronization device is used to debug the steam turbine generator to ensure the synchronous operation of the generator. At the same time, it can effectively monitor the operation status of electrical equipment and give timely early warning of equipment faults, Ensure the safety of waste incineration power plant.

Conclusion: To sum up, during the construction of electrical automation system in urban waste incineration power plant, make full use of modern technology, improve the centralized control system and relay protection system, add automation devices according to the actual situation, improve the automation degree of electrical equipment, and ensure the orderly development of relevant work of the power plant in a safe and stable environment.

（This article quotes "China electric power industry", if the infringement contact is deleted）

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