Application of Intelligent Motor Controller in Sri Lanka Power Plant

摘要：傳統的低壓電動機保護是通過繼電保護二次回路實現，但是我們結合電廠輔助控制設備的特點及其控制要求，推薦ARD2F智能型電動機控制器。以下綜合介紹ARD2F智能型電動機控制器產品的特點及其智能化保護、測量、控制和通訊等。

Abstract: The traditional low-voltage motor protection is achieved through the relay protection secondary circuit, but we combine the characteristics of the auxiliary control equipment of the power plant and its control requirements, and recommend the ARD2F intelligent motor controller. The following is a comprehensive introduction to the characteristics of ARD2F intelligent motor controller products and its intelligent protection, measurement, control and communication.

關鍵詞：電動機保護、智能化、通訊

Keywords: motor protection, intelligence, communication

1.前言 Blackground

因為發電廠電機設備的使用量逐步增多，促使電動機的正常運轉發揮成為了其他的設備能夠正常運轉的前提條件，因此能夠合理選擇和使用電動機控制器是對正常的工業現場生產工作負責的表現，只有在電動機正常發揮其功能的基礎上，才能夠保證整個電機設備的工作流程不會受到干擾，可以正常運行。在斯里蘭卡某電廠中，給客戶推薦我司的ARD2F系列。

Because the use of motor equipment in power plants is gradually increasing, the normal operation of the motor has become a prerequisite for the normal operation of other equipment. Therefore, the reasonable selection and use of motor controllers is responsible for normal industrial site production work. Only on the basis of the normal function of the motor, it can be ensured that the working process of the entire motor equipment will not be disturbed and can operate normally. In a power plant in Sri Lanka, we recommend our ARD2F series to customers.

在電廠電機設備的保護設計中，低壓電動機的應用及保護配置可采用多種方案進行設計，對于過去采用熱繼電器、斷路器（或熔斷器）作為電動機過負荷保護、斷相保護、短路保護和控制元件，我們ARD2F智能電動機控制器可實現重載起動，實現對電動機的溫度保護，還提供多種測控功能和多種電動機控制模式，能夠滿足對電動機的保護控制要求，合理地保障了電機的安全運行。接下來我們介紹下ARD2F智能型電動機控制器在發電廠中的實際應用進行具體介紹。

In the protection design of power plant electrical equipment, the application and protection configuration of low-voltage motors can be designed with a variety of solutions. In the past, thermal relays, circuit breakers (or fuses) were used as motor overload protection, phase failure protection, short-circuit protection and Control components, our ARD2F intelligent motor controller can realize heavy load starting and realize the temperature protection of the motor. It also provides a variety of measurement and control functions and a variety of motor control modes, which can meet the protection and control requirements of the motor, and effectively protect the motor safe operation. Next, we introduce the actual application of the ARD2F intelligent motor controller in power plants for a specific introduction.

2.電廠對電動機控制器的功能要求 

Functional requirements for motor controllers in the power plant

在電廠中，發電總量中消耗在電動機上的電量就占了很大一部分，而各類風機、水泵、空壓機又占電動機所耗電的一半以上。由于發電廠電動機的工作環境較惡劣，經常容易發生堵轉、短路、斷相或長期過載運行等故障，所以急需一個可以對電機進行實時保護、控制，保證發電廠電動機的正常運行。

In power plants, the electricity consumed by motors accounts for a large part of the total power generation, and various types of fans, pumps, and air compressors account for more than half of the electricity consumed by motors. Due to the harsh working environment of the motors in power plants, they are often prone to faults such as locked rotor, short circuit, open phase or long-term overload operation, so there is an urgent need for a real-time protection and control of the motor to ensure the normal operation of the motor in the power plant.

因此，ARD2F可以對電廠電機進行電壓、電流全電量參數測量，并且帶通訊功能，控制器需要有自診斷輸出、斷電輸出、故障記錄等功能，總結為如下功能：

Therefore, ARD2F can measure the voltage and current full power parameters of the power plant motor, and has communication functions. The controller needs to have functions such as self-diagnosis output, power-off output, and fault recording, which are summarized as the following functions:

1.實現完善的電機保護功能 Realize complete motor protection function

控制器通過采集三相交流電流、三相交流電壓、剩余電流、PTC熱電阻阻值、電動機電能等電量參數，以及電動機運行過程中的各種運動狀態等信號，經控制器內部處理運算，從而實現對電動機起動超時、過載、阻塞、欠載、斷相、三相電流不平衡、剩余電流（接地/漏電）、溫度、外部故障、相序、過壓、欠壓、欠功率、過功率、tE時間等全方面綜合保護，進而保證發電廠生產工作的安全連續運行。

The controller collects three-phase AC current, three-phase AC voltage, residual current, PTC thermal resistance resistance, motor electrical energy and other electrical parameters, as well as signals such as various motion states during the operation of the motor, and then processes and calculates internally by the controller. Realize the motor starting overtime, overload, blockage, underload, phase failure, three-phase current imbalance, residual current (ground/leakage), temperature, external fault, phase sequence, overvoltage, undervoltage, underpower, overpower, Comprehensive comprehensive protection such as tE time, and then ensure the safe and continuous operation of the power plant production work.

2.實現多種電動機控制方式 Realize a variety of motor control methods

智能型電動機控制器通過程序控制，實現多種不同的電動機起動控制，采用控制器來實現的操作控制權限包括：1）RS-485通訊接口實現遠程控制；2）能夠通過顯示模塊上的按鍵進行操作控制；3）通過DCS系統控制DI端子實現遠程自動控制；4）DI端子現場就地控制。

The intelligent motor controller realizes a variety of different motor starting control through program control. The operation control authority realized by the controller includes: 1) RS-485 communication interface to realize remote control; 2) It can be carried out through the buttons on the display module Operation control; 3) Realize remote automatic control through DCS system control DI terminal; 4) DI terminal on-site control.

3.實現現場實時監測電動機運行 Realize real-time monitoring of motor operation on site

電廠通過控制器能夠實時觀察現場電動機設備在運行過程中的電壓、電流、頻率等參數以及電動機當前的運行狀況，操作顯示模塊上的按鍵設置電廠電動機設備的起動方式（可選擇手步啟動、兩步啟動、雙速啟動和保護方式）。

Through the controller, the power plant can observe the voltage, current, frequency and other parameters of the field motor equipment in the running process and the current operating status of the motor in real time. Operate the buttons on the display module to set the starting mode of the power plant motor equipment (optional manual start, two Step start, two-speed start and protection mode). 

4.實現通訊功能 Realize communication function

控制器可通過RS-485通訊接口，經過Modbus-RTU或Profibus-DP通訊協議與上位機管理系統進行通訊連接，將信息在較短時間內發送給后臺管理系統并對故障信息發出報警信號，使操作人員能夠盡快發現故障原因并及時排除故障，實現電廠電動機設備的數據的實時傳輸功能。

The controller can communicate with the upper computer management system through the RS-485 communication interface through the Modbus-RTU or Profibus-DP communication protocol, and send the information to the background management system in the shortest time and send an alarm signal to the fault information to make the operation The personnel can find the cause of the fault and eliminate the fault in time to realize the real-time transmission function of the data of the electric motor equipment of the power plant.

ARD2F智能型電動機控制器采用模塊化的產品結構形式，包括主體控制模塊、互感器模塊和顯示模塊，并可根據工業現場的實際應用選配ARD2F智能型電動機控制器的其他功能模塊和附件。

ARD2F intelligent motor controller adopts modular product structure, including main control module, transformer module and display module, and can be equipped with other functional modules and accessories of ARD2F intelligent motor controller according to the actual application of the industrial field.

3.電廠選用ARD2F智能型電動機控制器產生的效果

The effect of using ARD2F intelligent motor controller in power plant

對電動機的運行實施保護以及保證電動機能夠連續不間斷的運行對于生產是至關重要的，電廠選用ARD2F智能型電動機控制器后帶來的好處有：

Protecting the operation of the motor and ensuring the continuous and uninterrupted operation of the motor are vital to production. The benefits of using the ARD2F intelligent motor controller for power plants include:

1.組網靈活性高，便于控制 High networking flexibility, easy to control

電廠中電動機控制器與配電產品的應用有著相同的比重，在實現組網的工作過程中，它們是密不可分的。ARD2F智能型電動機控制器提供了RS-485通訊接口，并且實現多種協議的選擇（Modbus-RTU/Profibus-DP），通過RS-485與上位機之間的通信，能夠方便工程師通過計算機后臺實現遠程自動控制和在線監視設備的運行狀況等。

The application of motor controllers and power distribution products in power plants has the same proportions, and they are inseparable in the process of realizing the networking. ARD2F intelligent motor controller provides RS-485 communication interface, and realizes the choice of multiple protocols (Modbus-RTU/Profibus-DP). Through the communication between RS-485 and the host computer, it is convenient for engineers to realize through the computer background Remote automatic control and online monitoring of equipment operation status, etc.

2.實時顯示參數，方便現場巡檢 Real-time display of parameters, convenient on-site inspection

ARD2F智能型電動機控制器是采用模塊化的產品結構形式，將顯示模塊安裝在DCS柜體，通過液晶界面即可實時觀察當前電動機的運行狀態，便于用戶對現場電動機的維護和控制。

The ARD2F intelligent motor controller adopts a modular product structure. The display module is installed in the DCS cabinet, and the current running status of the motor can be observed in real time through the LCD interface, which is convenient for users to maintain and control the on-site motor.

3.節能降耗 Energy saving

電動機控制器在節能降耗方面的作用開始為大家所重視，ARD2F智能型電動機控制器可以在電動機設備處于欠載等運行狀態時做自動停機，合理的避免了能源的浪費，為企業節省資金。

The role of the motor controller in energy saving and consumption reduction began to be paid attention to. The ARD2F intelligent motor controller can automatically stop when the motor equipment is under load and other operating conditions, effectively avoiding the waste of energy and saving money for the enterprise.

4.信息集中化 Information centralization

用戶可通過通訊模塊實現在后臺實時監測系統中各個電動機的運行狀況，隨時觀察設備的運行參數，如：電動機電流、電壓、電動機運行狀況、電動機電能等參數，通過分析采集到的信息，用戶可以對各個設備的電動機運行情況進行實時處理，提高了整個控制系統的安全性、可靠性。

The user can monitor the operating status of each motor in the system in real time through the communication module, and observe the operating parameters of the equipment at any time, such as: motor current, voltage, motor operating status, motor power and other parameters. By analyzing the collected information, the user can Real-time processing of the motor running status of each device improves the safety and reliability of the entire control system.

5.智能化自控保護 Intelligent automatic control protection

ARD2F智能型電動機控制器使用靈活，報警和保護參數可以通過軟件根據電廠電動機設備實際運行條件預設不同的值，避免因過度保護影響實際生產。用戶在選用ARD2F智能型電動機控制器后，一旦現場電動機出現故障，控制器及時控制電動機停止運行，并對各種故障信息作出相應的指示和記錄，方便用戶查詢故障信息。在電網故障造成電壓瞬間較大幅度的波動或者短時斷電又恢復，帶抗晃電功能時可使電動機控制器重新起動。

The ARD2F intelligent motor controller is flexible to use. The alarm and protection parameters can be preset to different values through the software according to the actual operating conditions of the power plant's motor equipment, so as to avoid excessive protection from affecting actual production. After the user selects the ARD2F intelligent motor controller, once the on-site motor fails, the controller controls the motor to stop running in time, and makes corresponding instructions and records of various fault information, so that the user can query the fault information. When the grid fault causes a large voltage fluctuation or short-term power failure and recovery, the motor controller can be restarted with the anti-shake function.

6. 記錄電機故障信息，便于現場問題分析 

Record motor fault information for easy on-site problem analysis

在發電廠工作的電動機設備大多數處于高溫、潮濕、多塵埃的工況下，很容易出現故障，一旦發生故障，檢修人員也很難盡快發現故障原因，并且需要一定的時間、人力和物力才能分析故障原因。ARD2F智能型電動機控制器有強大的故障和事件記錄、運行管理信息為現場維護人員節省了大量的時間，提高了維修人員的工作效率，進一步提高了整個控制回路的性能。

Most of the motor equipment working in power plants are in high temperature, humidity, and dusty conditions, which are prone to failure. Once a failure occurs, it is difficult for maintenance personnel to find the cause of the failure in the first time, and it takes a certain amount of time, manpower and Material resources can analyze the cause of the failure. The ARD2F intelligent motor controller has powerful fault and event records and operation management information, which saves a lot of time for field maintenance personnel, improves the work efficiency of maintenance personnel, and further improves the performance of the entire control loop. 

4.小結 Summary

在發電廠低壓電動機保護和監控系統中采用ARD2F智能型電動機控制器，在提高控制回路的自動化水平和可靠性的同時也提高了企業的綜合效益，做到了可靠性和經濟性的統一。并且，隨著技術的不斷發展，ARD2F智能型電動機控制器在發電廠低壓電動機保護及測控運行過程中將起到越來越大的作用。

The ARD2F intelligent motor controller is used in the low-voltage motor protection and monitoring system of the power plant, which not only improves the automation level and reliability of the control loop, but also improves the comprehensive benefits of the enterprise, and achieves the unity of reliability and economy. Moreover, with the continuous development of technology, ARD2F intelligent motor controller will play an increasingly important role in the protection and measurement and control of low-voltage motors in power plants.