Application of Power Monitoring System in Power Generation Projects

Based on the rapid development of science and technology at present, people rely more and more on power resources. At this stage, the operating costs of domestic power systems are still relatively high. Therefore, it is imperative to improve the work of all aspects of the power system. The power monitoring system plays an important role in the entire power system. It can effectively promote the efficiency of power grid management and reduce the operating costs of the power system. This paper describes the change of the power monitoring system through the application of the power monitoring system of the Rongcheng waste incineration power generation project. Electricity station application.

Key words: power system; data acquisition; substation; monitoring system 0 INTRODUCTION Distribution automation is an integrated information management system integrating computer technology, data transmission technology, control technology, modern equipment and management. Its purpose is to improve the reliability of power supply, improve the quality of power, provide users with quality services, reduce operating costs, and reduce the labor intensity of operating personnel.

With the continuous development of the electric power network and the continuous increase in the power load, various new types of loads have emerged. Users are paying more attention to the issue of power quality. At the same time, they also put forward more stringent requirements for power quality. Users need more effective power monitoring and management solutions to meet the challenges brought about by these changes, in order to achieve a continuous, reliable, efficient and low-cost operation of the power distribution system. This article describes the application of power monitoring systems in substations through the construction of power monitoring for Wengcheng MSW incineration power generation projects.

1 Project Overview and Construction Objectives Rongcheng MSW incineration power generation project is located in Rongcheng, Weihai City, Shandong Province. The 0.4kV part includes two transformer inlets and 148 low-voltage outlet circuits, which are responsible for the power supply of the entire waste treatment plant.

In the power monitoring system, the monitoring requirements mainly include the following aspects: 1. Remote observation. The system is required to accurately detect current, voltage, active power, reactive power, active power, reactive power, apparent power, power factor, frequency, switching status, and residual current.

2. Remote communications. The system is required to deliver the operational status of the equipment and fault information in a timely manner.

3. Alarm. The system is required to set alarms for various kinds of information.

4. Display. The system is required to be able to display the operational information of each part on the spot.

2 Design of the power monitoring system In the design of the monitoring system, it is necessary to fully consider the actual needs of customers, as well as the actual structure of the power system, the actual load capacity of the power system, and other factors, and then reasonably select the monitoring equipment, which is conducive to the reduction of the system. The cost of operation is also conducive to the realization of system functions. 2.1 System Structure Based on the new distribution of the project, the online monitoring system for energy consumption adopts a hierarchical distributed structure. The system includes: station management layer, network communication layer, and field device layer.

The direct window of human-computer interaction between the management and management personnel of the management team and the computer calculates, analyzes, and processes various types of data collected on the site, and reflects the operating status of the site in terms of graphics, digital display, sound, etc. The upper part. Mainly by the system software and necessary hardware equipment, such as industrial-grade computers, printers, UPS power supply and other components.

The device used by the communication layer is the NPORT5610 serial port server. This layer is a bridge for data information exchange. It is responsible for the collection, classification, and transmission of data information sent back by field devices, and it also conveys various control commands from the upper computer to the field devices.

The field device layer is mainly connected to various types of instruments used for the collection and measurement of electrical parameters in the network, and it is also a necessary basic element for constructing the distribution system. According to the actual characteristics of this project, Ankerui intelligent instruments are installed for each circuit of the low-voltage distribution circuit during the design of the project to realize the residual current, temperature, three-phase current, three-phase voltage, frequency, power, and Quadrant power and other electrical parameters monitoring.

2.2 Network Design The network system in the power monitoring system can transmit data in time and transfer operation instructions quickly, which is the basis for realizing various functions of the power monitoring system. For the Rongcheng MSW incineration project power monitoring system, there are relatively few monitoring devices in the system, and all are concentrated in one distribution time. At this time, each device can be connected to the bus in situ and then each All the buses are connected to the communication gateway to realize the transfer with the host. 2.3 monitoring system software function design system based on the actual needs of the customer design, and achieved a main wiring diagram interface display; electrical parameters of remote sensing and electrical parameter limit violation alarm; event record; system operation anomaly monitoring; fault alarm and operation records; report query And printing; system load real-time, history curve, user rights management and other major functions.

2.3.1 Data Acquisition and Processing Data acquisition mainly includes analog and digital acquisition. The acquisition of analog quantity mainly collects the information of line voltage, current, power, power factor, frequency, etc. The collection of switch quantity is mainly for the working status of the circuit breaker and other equipment, as well as the alarm information such as power-off protection and operation failure. Acquisition to achieve local real-time display of remote data. The data processing mainly displays the electrical parameters collected according to requirements in real time and accurately to the user, achieving the automation and intelligent requirements of the power distribution monitoring, and storing the collected data in the database for user query.

2.3.2 Data Recording The data recording function of the power monitoring system is mainly to record the state of the circuit breakers. It requires that there must be enough memory space in the system, and then a long time and a large amount of data information is recorded and stored. Secondly, the data recording function of the power monitoring system also includes the recording of fault information, that is, recording and storing data such as real-time current and real-time voltage when the fault occurs. It can be seen that the data recording function can accurately reflect the problems existing in the system through the recording of the working status of the protection device and the recording of the fault information, thereby facilitating the solution of the staff.

2.3.3 Power Management In order to realize the supervision of the power consumption of each circuit in the plant area, the system has designed a power management report. The system automatically generates daily reports, monthly reports and annual reports according to the different names of the circuits by collecting the active power. It also has a report printing function, and can inquire about the electricity consumption in a certain period of time in a certain loop, which can help the factory management to establish an effective energy management assessment system. Through the construction of the system and the establishment of the system, the awareness of energy conservation of the staff in the factory area has been greatly improved, and the energy consumption of the factory has been effectively saved.

3. Significance of applying power monitoring system in power supply and distribution design In summary, the power monitoring system helps power units to improve efficiency, reduce losses, and reduce operating costs. The power monitoring system can effectively ensure power grid management efficiency and reduce power operation costs. It also becomes an indispensable part of power supply and distribution design. The power monitoring system's functions such as communication, fault alarm, and data storage and recording make the staff more convenient in practical work. Through the man-machine interface, the operating status of the power system can be directly understood and the operating instructions can be rapidly transmitted. The transmission of data by devices is achieved through network transmission. Therefore, different power monitoring systems can be designed with different networking methods to ensure that data information can be transmitted quickly and accurately. On the other hand, in the power supply and distribution design using the power monitoring system, monitoring equipment should be selected according to the actual situation. General power monitoring systems usually use devices with long-distance communications, remote observation, and remote control, while some high-end power monitoring systems require smart devices with more complete functions. The power monitoring system can realize real-time monitoring of the low-voltage distribution circuit of this project, which is beneficial to distribution management.

On the other hand, the power monitoring system can not only accurately show the power status of the loop, but also has network communication and other functions. It can be combined with computers, serial servers and other devices to display the operating status of each distribution circuit in the factory. When the power system load exceeds the standard, the power monitoring system can promptly pop up an alarm. In addition, the power monitoring system can also generate statistical information such as reports and graphs, which facilitates the analysis of power consumption in various parts of the plant and makes the power activities in the plant area more secure, thereby ensuring the safety of the life of the plant personnel and improving the work of the staff. effectiveness.