I. Overview.
Modern factories (especially large enterprises) have high power supply load density, complex power supply methods, high reliability requirements, strict power quality requirements, and also require greater flexibility to adapt to the needs of increasing power supply loads and power supply network upgrades. In view of this situation, the integration of integrated automation technology into the factory power supply system has become an inevitable trend and development direction.
QYGDX-02 Factory Power Supply Integrated Automation Training System" is a comprehensive training system designed in combination with the practical application and development of the factory power supply system based on the training and teaching requirements of courses such as "Factory Electrical Appliances and Power Supply", "Electrical Equipment and Operation and Maintenance", "Power Supply and Distribution Technology", "Power Supply and Power Network Relay Protection", "Distribution System Automation" and "Distribution Network Automation Technology".
2. Features.
Comprehensiveness: Clearly reflect the primary and secondary parts of a typical factory power supply system, and comprehensively adopt a variety of electrical equipment for practical applications of factory power supply. Able to realize the practical skills training requirements of the power supply, transmission, distribution, control, protection and other aspects of the factory power supply system;
Advanced: Integrate the related technologies of microcomputer relay protection, power metering, PLC and industrial control configuration, and adopt a hierarchical distributed control mode to form a comprehensive automation experimental platform integrating control, protection, measurement and signal
Practicability: The system structure is clear, the operation is flexible, and the operation is reliable.
3. Technical performance.
1.Input power: three-phase four-wire AC380V 10% 50 2%Hz;
2.Capacity: 3kva;
3.The training table is made of iron matte dense grain spraying and aluminum panel
4.RS-485 and Ethernet communication interfacesStandard modbus communication protocol;
5.Accuracy of measuring cell of microcomputer protection device: scale error: not more than 1%;Measured current: 0Level 2;Bus voltage: 0Level 2;Output accuracy: 0Level 2;Frequency: 001hz；p、q、cosφ；0.Level 5;Communication resolution: no more than 1ms.
6.The training system consists of four parts: the main wiring simulation screen of the power supply and distribution system, the metering cabinet, the control cabinet and the monitoring software.
7.The training system can simulate the power supply and distribution system of a medium-sized factory, adopt a control panel structure, and the main wiring is printed on the aluminum panel at one time. It is composed of 35 kV, 10kV, two different voltage levels, and the whole system has two 35kV incoming lines, one of which is normally powered and the other is used as a standby, which is automatically switched through standby self-throwingThere are two branches of the 35kv bus outgoing line, one is sent to other branches, and one is the incoming power supply 1 of the 10kv bus is stepped-down by the total step-down for local useIn order to ensure the reliability of power supply, an additional power supply is added as the incoming power supply of the 10kV bus2. The incoming power supply 1 and the incoming power supply 2 are dark standby with each other, and supply power to the 10kV section bus and the 10kV section bus respectively, and the two can also be automatically switched through standby self-throwing. In order to ensure the reliability of the primary line power supply, the microcomputer is equipped with self-investment, microcomputer line and microcomputer transformer protectionIn order to ensure the stable operation of the high-voltage motor, the high-voltage motor protection is configuredIn order to improve the quality of electricity, a reactive power compensation device is configuredIn order to realize the automatic control, the PC and PLC controller are configured to realize the "four remote" function of the whole system.
8.The metering cabinet includes: three pointer AC voltmeters (accuracy 1Class 0, range: 0 500V);Three pointer AC ammeters (accuracy 1Class 0, range: 0 5a);An analog three-phase active power meter and a three-phase reactive power meter are each oneElectronic active and reactive power combined electric energy meter (1): measuring current: 0Level 2;Bus voltage: 0Level 2;Output accuracy: 0Level 2;Frequency: 001hz；p、q、cosφ；0.Level 5;Communication resolution: no more than 1ms. Three-phase intelligent acquisition module (1): measurement accuracy: current, voltage 02. Other power 05％；With RS-485 communication interface;Digital electric stopwatch (1 piece): measuring range 00001s-9999.9s, measurement error 5 10-5 range 1 mantissa number, with continuous and touch two functions. Adaptable to empty contacts or 5V-250V positive polarity electrical signals. Continuous manual zeroing, tactile can be manually zeroed, or it can be automatically reset with the measurement signal.
9.The control cabinet includes: microcomputer circuit protection device (1);Micro-electromechanical motor protection device (1);Microcomputer transformer protection device (1);Reactive power compensation device (1);The microcomputer is equipped with a self-throwing device (1).
n Using 32-bit processor, 16-bit AD sampling, the main components are all imported devices, to ensure the high reliability of the electrical design of the device, the product has passed the strict type test and electromagnetic compatibility test, to ensure the adaptability and reliability of the product in the harsh environment.
n Designed for 35kV and below main transformer, distribution system feeder, capacitor, motor, transformer and standby self-investment, etc. In addition to the perfect protection function, it also has the measurement function of the electrical quantity of the equipment and the programmable control function of the equipment, has a communication interface, and can transmit data and information to the host computer (monitoring, dispatching computer) through the field bus, and at the same time accept the control commands such as opening and closing of the host computer.
n The integrated profile chassis is convenient and flexible for installation, suitable for fixed and hybrid cabinet types, and can also be installed in a centralized grouping screen.
n It has multiple switching inputs and outputs, which can be expanded on the standard version according to user needs, and all the switching is AC and DC.
n AC and DC dual-purpose operation loop, adaptive 05 5A switch trip and closing current;The operation circuit is equipped with an anti-hopping circuit.
n Equipped with industrial-grade wide-temperature 160 160 dot matrix LCD, full Chinese operation menu and accident message display.
n The real-time information of the equipment is displayed on the panel, and the operating conditions of the equipment are monitored, such as: current, voltage, power, switch position, etc., and there is a perfect warning and alarm function.
n It has the function of fault recording, which can record two weeks before the protection start, two weeks before the protection action, and eight cycles after the protection start and after the protection action.
n The device has analog generation of standard 4-phase voltage and 3-phase current, which is convenient for various combination outputs to carry out various types of protection tests. The voltage of each phase can be set to 200V, and the accuracy: error 001v；The current three-phase can output 200A, and the accuracy: error 001a。Phase Range: 360, Accuracy: Error 01º；Resolution: 001º。It can simulate the sampling value of the microcomputer measurement and control device under various operating conditions, such as: outage, normal, fault and other working conditions, automatically switch the set value under each working condition, and cooperate with the device to correctly switch the equipment once.
n It has one standard RS485 communication interface (Modbus RTU communication protocol) and n two Ethernet communication (IEC60870-5-103 communication protocol).
n The static power consumption of the whole machine is less than 10W.
n High anti-interference, passed 10 electromagnetic compatibility certifications (fast transient, electrostatic discharge, surge anti-interference, etc.).
10.The upper computer has monitoring software, and the monitoring host and field intelligent equipment use RS485 bus and Modbus-RTU protocol to build the underlying monitoring network. It mainly realizes the following functions: 1. Configure the primary power supply and distribution system and display the changes of the main wiring in real time2. Real-time collection, display and storage of various power parameters;3. Real-time and historical curves and reports can be generated for various amounts of electricity collected, which are conducive to the comparison and analysis of experimental data by experimenters4. Monitor the position of each circuit breaker and the status of the protection action exitAble to control the tripping and closing of the circuit breaker of the transmission line;5. Automatic adjustment of voltage and reactive power is realized according to the collected bus power.
11.The PLC adopts Siemens PLC host.
Fourth, the training project.
1.Cognition of the electrical wiring diagram of the factory power supply.
1) Cognition of the simulation diagram of the primary electrical wiring of the factory power supply.
2) Practical training of the secondary control loop wiring and signal loop of the factory power supply.
3) Wiring method of voltage and current transformer.
4) Factory power supply reverse gate operation.
2.Practical training of factory automatic devices.
1) Standby power supply automatic input device parameter setting operation.
2) Standby power is automatically put in.
3) Reactive power compensation device parameter setting operation.
4) Reactive power automatic compensation function.
5) Provision of investment conditions test.
6) Incoming line backup (bright standby) and self-adaptive.
7) Parent coupling backup investment (dark standby) and self-adaptation.
8) Cognition of reactive power compensation device.
9) Manual: Automatic power factor compensation.
10) Line reactive power control.
11) VQC voltage reactive power control.
3.Microcomputer relay protection for high-voltage lines in factories.
1) Simulated system short circuit.
2) Microcomputer circuit protection device parameter setting operation.
3) No time-limited current quick break protection.
4) Quick break protection with time-limited current.
5) Time-limited overcurrent protection.
6) Directional overcurrent protection.
7) Overcurrent three-phase one-time reclosing protection.
8) Anti-time overcurrent protection.
9) Current and voltage interlocking protection.
10) Zero sequence current protection.
11) Zero sequence voltage protection.
4.Relay protection for high-voltage motors.
1) Inverter parameter tuning operation.
2) Open-loop speed regulation training of frequency converter.
3) The starting mode of the three-phase asynchronous motor.
4) Parameter setting operation of micro-electromechanical motor protection device.
5) Quick break protection of high-voltage motor.
6) The high-voltage motor evades the quick-break protection of the starting current.
7) Negative sequence overcurrent protection of high-voltage motor.
8) High voltage motor stall protection.
9) Overcurrent protection of high voltage motor.
10) Overvoltage protection for high-voltage motors.
11) High voltage motor undervoltage protection.
12) Zero-sequence overcurrent protection for high-voltage motor.
5.Transformer microcomputer relay protection.
1) Transformer overcurrent protection.
2) Transformer counter-time overcurrent protection.
3) Transformer overload protection.
4) Transformer zero sequence overcurrent protection.
5) Transformer zero sequence voltage protection.
6) Transformer low voltage protection.
7) Non-electric protection such as transformer gas and overtemperature.
6.Overall monitoring and integrated automation.
1) SCADA monitoring.
2) Line fault location, alarm and excision.
3) Power curve analysis and report.
5. Configuration list.
6. Substation monitoring software.
1. Overview. The electric power integrated automatic monitoring system supports the distributed architecture based on a variety of communication modes, adopts the objectified equipment description method, and the description of the system changes from the traditional telemotion-oriented data list mode to the hierarchical mode, and the object level can be arbitrarily nested, which can reflect the composition of the power system more intuitively and conveniently.