Design and application of power monitoring system for Bayan Gaulle coal preparation plant project

Abstract:This paper introduces the power monitoring system of Bayan Gauler coal preparation plant project, which adopts intelligent power instruments and collects various electrical parameters and switching signals
at the power distribution site.

The system adopts the way of on-site networking, which communicates through the fieldbus and transmits to the background after networking, and realizes the real-time monitoring and management
of the power distribution circuit of the distribution room through the Acrel-2000Z type power monitoring system.

Keywords: Bayan Gol Coal Preparation Plant Project; Intelligent power meter; Acrel-2000Z; Power monitoring system; Overview The power monitoring system of the Bayan Gaulle coal preparation plant project includes 31 AMC72L/E4-K Ankeri multi-function meters and 78 ARDR Ankeri motor protectors
.

Set up a set of local Acquaray power monitoring system to monitor the operation status
of the instruments in the duty room.

1 demand analysis to ensure the statistics and analysis of production management of electricity load and real-time monitoring
of hazard sources.

It is necessary to monitor
the voltage, current, power and other parameters of the distribution site in real time.

Once the monitoring point is monitored with abnormal parameters, the alarm can be detected in time, and the relevant personnel take the necessary measures to avoid the occurrence
of safety accidents.

The automatic meter reading function saves manpower and material resources, and the power trend curve function can intuitively display the working status and time of each circuit, which is convenient for users to find out the abnormal power circuit and rectify it in time, and establish a multi-level measurement system for electric energy to provide energy analysis basis
.

This technical condition applies to the Bayan Gaul coal preparation plant project
.

It has the characteristics
of high safety and reliability, easy to expand, easy to repair and maintain, etc.

Data acquisition Automatically collects the analog data of all power meters in the field, and automatically collects the switching data
such as the on-site switching status and fault status.

Support real-time acquisition, automatic cycle acquisition (timed acquisition) and configurable cycle (1 minute to 24 hours
).

Support data transmission correctness test, abnormal data automatic processing
.

Support multi-threading mechanism, improve data acquisition efficiency, can be multiple devices at the same time data collection
.

The real-time display of data adopts the intuitive display mode of the main wiring diagram of the distribution box, and the broken switch and fault status of each circuit are intuitively visible
.

Data analysis and processing The comprehensive statistics and analysis of data need to achieve the following functions: Statistics and calculations of electricity consumption data of each equipment in hours, days, months, years and other time periods
.

The electrical load (active, reactive) of each equipment is calculated as
the maximum, minimum and average value.

Count the electricity consumption of each substation and the whole (active and reactive).


Data query and display requirements can facilitate the realization of client query and query of management personnel at all levels, the query interface can adapt to the requirements of management personnel at all levels can support flexible combination of conditions query and comparative analysis, all kinds of statistical analysis of data can flexibly use reports and other charts to intuitively display functions
.

According to the different permissions of different users, the data display function is divided into three layers: operation layer, management level and decision-making layer
.

The operation layer has functions
such as energy use analysis, cumulative consumption, real-time monitoring, operation record and proportion, comparison, and benchmarking analysis.

The management team has the functions
of energy consumption data statistics and analysis, comparison of classification and sub-items, and benchmarking analysis.

The decision-making layer has functions
such as energy data analysis, data deletion, and database import/export.

Permission management requires different users to be given different roles of permissions, can be authorized to function submenus, specific file records, data records, etc
.

The system requires a reasonable and perfect user security control mechanism, which can effectively protect the information resources in the application environment and prevent the loss, theft and destruction
of information.

Energy-saving renovation and effect evaluation are required to provide data support for the production of energy-saving transformation, and can provide the effect evaluation
before and after energy-saving transformation.

Parameter setting The ratio of each circuit transformer can be set through the acquisition cabinet, and various current and voltage protection settings can
be set.

Fault judgment and alarm have automatic fault judgment and use bullet frame alarm function
.

Alarm types include switch faults, voltage and current overruns, communication failures of on-site acquisition modules, communication failures with monitoring systems, etc
.

The alarm time is automatically recorded in the system database, which is convenient for users to inquire, and the staff can grasp the real-time operation status of the substation at any time, find the operation fault of the substation and make corresponding treatment, improve the management efficiency of the substation and distribution, and improve the safety and reliability of
the power system.

2 System Scheme According to the actual situation of the Bayan Gaulle coal preparation plant project site, the overall network structure adopts shielded twisted pair wire directly connected to the data logger and then uploads the data to the monitoring host of the distribution room through the network cable, ensuring the stability and real-time transmission
of the power monitoring system.

1) Station control management The station control management is a direct window
for human-computer interaction for the management personnel of the power monitoring system.

Set up a local power monitoring system in the duty room to monitor the health
of all distribution cabinets.

2) Network communication layer The communication layer is mainly composed
of collectors, Ethernet devices and bus networks.

The main function of the communication management machine is to monitor the on-site intelligent instrument; The main function of Ethernet equipment and bus network is to realize the data interaction between the instrument and the master, so that the distribution system management is centralized, informationized and intelligent, which greatly improves the safety, reliability and stability of the power distribution system and achieves the purpose of
unattended.

3) Field equipment layer The field equipment layer is a data acquisition terminal, mainly composed of intelligent instruments, intelligent instruments through the shielded twisted pair RS485 interface, the use of MODBUS communication protocol bus type connection access to the communication server, through the communication server to the distribution room monitoring host for networking, to achieve remote control
.

System structure diagram 3 System function Distribution cabinet real-time monitoring system diagram is the main monitoring screen, mainly real-time monitoring of the operating status of all circuits of the distribution cabinet, red represents closing, green represents the tap
.

In the system diagram, you can intuitively see the operating parameters and status of each inlet and outlet, and you can see all the conventional power parameters on the outlet side of the transformer, such as: three-phase voltage, current, active power, reactive power, power factor, frequency, active power, etc
.

As shown in the following figure: A system diagram telematics and telemetry alarm functions, mainly complete the high and low voltage of each outlet loop of the switch operating status and load inlet monitoring, the switch position and load over the limit pop-up alarm interface indicates the specific alarm location and sound alarm, remind the duty personnel to deal with
it in time.

The load overrun value can be set
freely under the corresponding permissions.

The curve recording function mainly completes the recording of information events and the occurrence time of the inquiry time period, provides a basis for the duty personnel and analyzes the cause of the accident parameter meter reading function, and mainly queries
the electrical parameters of the low-voltage outgoing circuit.

Support telephone parameter query at any time, with data export and report printing and other functions
.

The report queries the electrical parameters of each low-voltage circuit in and out of the line, including: three-phase current, active power and active power
.

The loop names are associated with the database in this report to facilitate the user to modify the loop names
.

As shown in the following figure: Electricity parameter meter reading power report function, you can select the time period for query, support any time period of electricity cumulative query, with data export and report printing and other functions
.

Provide accurate and reliable power reports
for duty personnel.

The loop names are associated with the database in this report to facilitate the user to modify the loop names
.

As below screenshot shown, users can print the report directly, which can be saved to other locations
in Excel format.

As shown in the following figure: Power report system communication structure schematic diagram, mainly showing the networking structure of the system, the system adopts a hierarchical distributed structure, while monitoring the communication status
of the spacer layer equipment.

Red indicates normal communication, and green indicates communication failure
.

The following figure is a schematic diagram
of the communication status of the power distribution cabinet.

4 Conclusion In the application of today's power distribution facilities, the distribution safety of the project is crucial, the Acrel-2000Z power monitoring system introduced in this article in the Bayangooler coal preparation plant project power monitoring system distribution cabinet application, can realize the distribution room power supply and distribution circuit real-time monitoring, not only can display the circuit power status, but also has a network communication function, can be with the communication management machine, computer and so on to form a power
。
The system realizes the analysis and processing of the collected data, real-time display of the operating status of each distribution circuit in the distribution room, has a pop-up alarm dialog box for the load overrun, and generates various power reports, analysis curves, graphs, etc.
, which is convenient for the remote meter reading of electric energy and analysis, research, the system operates safely, reliably and stably for the distribution cabinet project to solve the problem of electricity consumption, and has achieved good enterprise benefits
.

References: [1] "Principle and Application Guide of Electric Power Measurement Digital Instrument", Ren Zhicheng, Zhou Zhong, China Electric Power Publishing House [2] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Science and Technology Wind [3] "Power Monitoring and Application in 10kv Power Supply and Distribution Design", Yao Qiang, Science and Technology Tiandi