CN203520719U - 10kV power distribution device real voltage simulation current closed-loop full-true training system - Google Patents

Abstract

Provided is a 10kV power distribution unit actual voltage simulation current closed-loop all-real training system, comprising a power distribution cabinet system formed by real high and low voltage switchgears, and a computer control system. The power distribution cabinet system comprises real 10kV voltage, a 10kV voltage transformer, a breaker, and a signal acquisition module. The secondary side of the 10kV voltage transformer is connected with the busbar side of the real 10kV voltage. An auxiliary contact of the breaker is connected with the busbar side of the real 10kV voltage. Input ends of the signal acquisition module are connected with output ends of the 10kV voltage transformer and the breaker. An output end of the signal acquisition module is connected with the computer control system. The computer control system is used to output corresponding virtual power supply according to the above voltage signals and on/off status signals of the breaker. Beneficial effects of the system are that a disadvantage that an existing simulation system cannot be operated in reality is overcome, the system can simulate relatively many fault types, and can realize a plurality of different real field scene control modes, functions are complete, and cost is low.

Description

10kV power distribution device real voltage simulation current closed-loop full-true training system

technical field

The utility model relates to the technical field of full-truth wiring simulation of power distribution devices, in particular to a real voltage simulation current closed-loop full-true training system for 10kV power distribution devices, which is used for technical training of full-real 10kV equipment on-site operation and fault simulation and operation . the

Background technique

The traditional 10kV typical customer training system cannot be operated with electricity, and cannot be combined with real equipment on site. In this way, various failures of on-site equipment cannot be truly reflected, and there are disadvantages that it cannot be operated in real life. Requirements for training and examination. the

Contents of the invention

The technical problem to be solved by the utility model is to provide a real voltage simulation current closed-loop full-true training system for 10kV power distribution devices in view of the above-mentioned deficiencies in the prior art. Hands-on training and troubleshooting methods. the

The technical scheme that the utility model adopts for solving the problems of the technologies described above is:

10kV power distribution device real voltage simulation current closed-loop full-true training system, including a power distribution cabinet system composed of real high and low voltage switch cabinets and a computer control system. The power distribution cabinet system includes real 10kV voltage, 10kV voltage transformers, circuit breakers , signal acquisition module; the secondary side of the 10kV voltage transformer is connected to the bus side of the real 10kV voltage, and is used to obtain the voltage signal of the 10kV bus side, and the auxiliary contact of the circuit breaker is connected to the bus side of the real 10kV voltage, It is used to obtain the close/open state signal of the main contact at the corresponding position of the auxiliary contact of each circuit breaker; the input end of the signal acquisition module is connected to the output end of the 10kV voltage transformer and the circuit breaker, and the output end of the signal acquisition module It is connected to the computer control system, and the computer control system is used to output the corresponding virtual power supply according to the above voltage signal and the on/off state signal of the circuit breaker.

According to the above scheme, the computer control system includes an upper PC, an Ethernet communication controller, a computer controller, a PLC controller, a wiring changeover relay, a virtual power supply, an analog circuit and a fault display instrument, and the upper PC passes through the Ethernet The network communication controller communicates with the computer controller and is used to set and reset each simulated fault state; the output end of the PLC controller is connected with the control end of the wiring conversion relay, which is used to perform the simulated fault state set by the upper PC Conversion control and output to the wiring conversion relay; the virtual power supply outputs the required voltage; the analog circuit is connected in series between the output terminal of the virtual power supply and the contact of the wiring conversion relay to realize the operation of the full 10kV power distribution system and fault simulation; the fault display instrument is connected to the wiring conversion relay. the

According to the above solution, the simulation circuit includes an open circuit fault simulation circuit, a short circuit fault simulation circuit, a reverse polarity fault simulation circuit, a reverse phase sequence fault simulation circuit and a voltage insulation drop fault simulation circuit. the

According to the above solution, the open circuit fault simulation circuit and the short circuit fault simulation circuit are composed of a connection switch relay contact series or parallel circuit. the

According to the above scheme, the reverse polarity fault simulation circuit and the reverse phase sequence simulation circuit are composed of two linked reverse contacts of the wiring transfer relay cross-connected between the two ends of the simulation circuit. the

The working principle of the utility model: the utility model is composed of the real 10kV voltage and the auxiliary contact of the circuit breaker to form the analog current closed-loop control loop of the training system. The on/off state signal of the auxiliary contact of the circuit breaker, the above voltage signal and the on/off state signal of the circuit breaker are set by the computer control system and cooperate with the load terminal system to output the corresponding virtual power supply and generate various analog currents corresponding to the line The signal (the analog current output signal can be changed according to the set conditions) reflects the working status of the circuit, and the fault display instrument realizes the online display of the load in the disconnected state of the circuit breaker, which constitutes the training and assessment of the production skills of the relevant personnel of the power system by the system And system demonstration and other work, truly reflect the real live operation status of 10kV power distribution equipment; equipment technical requirements and safety requirements are completely consistent with the site, reflecting the real site environment. The "five-prevention" function of the real equipment ensures that the equipment is consistent with the site and the safety of the operation and training personnel when the equipment is actually charged at 10kV. the

In addition to the on-site display of each power distribution device, the utility model can also be used to monitor the output voltage, current and power (electric energy) of the power supply by centralized control and real gauges on the teacher's computer. the

The utility model has the beneficial effects compared with the prior art:

1. The utility model organically combines the real 10kV power distribution cabinet system with the computer control system and virtual load power loading technology, collects the voltage signal on the side of the 10kV busbar and the closing/opening state signal of the auxiliary contact of the circuit breaker, and passes the relevant signal Cooperate with the load terminal system (combined control), according to the subjective teaching wishes of the trainers, provide the load power and current in the corresponding state of the system through the virtual power supply of the computer control system; it can also be set by the computer to control the load when the 10kV voltage exists The power supply sets various faults, simulates and generates corresponding faults, and achieves the same effect as the actual equipment operation and real faults on site; adopts a closed-loop control system of real voltage and simulated current to ensure that it can reflect and The operating conditions of the simulation device and the training method are completely close to the actual production; it overcomes the disadvantages that the existing simulation system cannot truly reflect the on-site equipment and cannot be operated in reality;

2. The utility model can simulate many types of faults, realize the 10kV power distribution device system to reflect the operating conditions of the power distribution device under various real equipment, real environments, and real voltages and simulate various fault states, including faults such as short circuit and open circuit It can also control the current polarity reverse connection, current phase sequence cross-phase, voltage three-phase three-wire and three-phase four-wire conversion, voltage polarity reverse connection, voltage phase sequence cross-phase, voltage Various types of operation and failure of a large number of secondary circuit wrong wiring such as insulation drop, to meet the safety issues of training at high voltage levels;

3. The system only needs to set the required fault type in the computer control system machine, and can automatically realize the setting and recovery of the corresponding fault, which has the advantages of real, fast, flexible, and good concealment; In the environment, conduct skill training operations such as electricity business inspection, customer safety inspection, client completion acceptance, client operation and troubleshooting, and fully implement various faults and various protection actions that are not easy to occur in the real site in the training room. Presented, it becomes a multi-functional skills training system integrating "teaching, learning, practice and testing";

4. With the cooperation of the virtual power supply, using the upper PC to connect through the Ethernet communication controller, multiple different fault simulation devices can be controlled at the same time. The computer control system of the device can choose PLC or other components. PLC has fast The feature of high degree of stability can ensure the stable and reliable operation of the system, realize the real scene control mode, the equipment is real, the environment is real, the function is complete, and the cost is low.

Description of drawings

Fig. 1 is a schematic structural diagram of the real voltage analog current closed-loop full-true training system of the 10kV power distribution device of the present invention;

Fig. 2 is a wiring schematic diagram of the measurement of the voltage signal on the 10kV voltage bus side of the utility model and the measurement of the closing/opening signal of the circuit breaker;

Fig. 3 is the structural composition schematic diagram of the utility model computer control system;

Fig. 4 is a schematic diagram of the access state structure of the utility model simulating an open circuit fault;

Fig. 5 is a schematic structural diagram of the connection state of the short-circuit fault of the present invention.

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is described further. the

As shown in Figure 1, the 10kV power distribution device real voltage simulation current closed-loop full-true training system described in the utility model includes a power distribution cabinet system composed of real high and low voltage switch cabinets and a computer control system. Including a real 10kV voltage, a 10kV voltage transformer, a circuit breaker, and a signal acquisition module; the secondary side of the 10kV voltage transformer is connected to the bus side of the real 10kV voltage for obtaining voltage signals on the 10kV bus side, and the circuit breaker The auxiliary contact of the auxiliary contact is connected to the real 10kV voltage busbar side, and is used to obtain the closing/opening state signal of the main contact corresponding to the auxiliary contact of each circuit breaker; the input terminal of the signal acquisition module is connected to the 10kV voltage transformer and circuit breaker The output terminal of the signal acquisition module is connected to the computer control system, and the computer control system is used to output the corresponding virtual power supply according to the above voltage signal and the closing/opening state signal of the circuit breaker. the

The voltage signal on the side of the 10kV voltage bus is obtained from the secondary side of the voltage transformer, reflecting whether the system is actually charged; at the same time, according to the position signal of the auxiliary contact of the circuit breaker, the above two signals are combined and controlled, and the corresponding output is set by the computer control system. The virtual power supply and the working state of the simulated circuit truly reflect the live operation status of the 10kV power distribution device. the

For line load conditions, the corresponding load conditions can be simulated through the virtual power supply to achieve various normal, fault and abnormal working states under the real 10kV voltage, and realize the simulation of various operating and fault states under the real state. the

The schematic diagram of wiring for voltage signal measurement on the 10kV voltage busbar side and circuit breaker closing/opening signal measurement is shown in Figure 2. The 10kV voltage of the system uses a real power supply, and its power distribution devices are equipped and wired according to the real scene. Among them, the 10kV voltage can be directly connected from the mains, or can be obtained by boosting the 380V power supply from the laboratory to 10kV by using a step-up transformer; the measurement signal of the signal acquisition module includes two parts, one part is measured from the voltage transformer on the 10kV power supply side The voltage signal, the other part is the circuit breaker opening/closing signal obtained from the main incoming line circuit breaker and each circuit breaker of the power distribution device. Through the combination of measurement signals, it is provided to the computer control system to complete the operation and fault setting of the relevant power distribution device . the

The structural composition of described computer control system is as shown in Fig. 3, comprises host PC, Ethernet communication controller, computer controller, PLC controller, wiring conversion relay, virtual power supply, analog loop and fault display instrument, described host The PC is communicated with the computer controller through the Ethernet communication controller, and is used for setting and resetting each simulated fault state; Simulate the fault state for conversion control and output to the wiring conversion relay; the virtual power supply outputs the required voltage; the analog circuit is connected in series between the output terminal of the virtual power supply and the contact of the wiring conversion relay to realize a full-real 10kV distribution relay. The operation and fault simulation of the electrical system; the fault display instrument is connected with the wiring conversion relay (exactly the same as the field). the

The simulation circuit includes an open circuit fault simulation circuit, a short circuit fault simulation circuit, a reverse polarity fault simulation circuit, a reverse phase sequence fault simulation circuit and a voltage insulation drop fault simulation circuit. the

The open-circuit fault simulation circuit and the short-circuit fault simulation circuit are composed of a connection switch relay contact series or parallel circuit. Figures 4 to 5 are schematic diagrams of the access state structure of an embodiment of the system for simulating open-circuit faults and short-circuit faults. Figure 4 shows the simulation of open-circuit faults, and the normally closed contacts of the wiring changeover relays are connected in series in the simulation circuit. , when it is necessary to set the circuit breaker fault, the computer controls the PLC controller to energize the wiring conversion relay to disconnect the circuit. Figure 5 shows the short-circuit fault simulation. The normally open contacts of the wiring conversion relay are connected in series in the simulation circuit. When the circuit short-circuit fault needs to be set, the PC controls the PLC controller to energize the wiring conversion relay and short-circuit the circuit. the

The reverse polarity fault simulation circuit and the reverse phase sequence simulation circuit are composed of two linked reverse contacts of the wiring conversion relays cross-connected between the two ends of the simulation circuit. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (5)

1. The authentic training system of 1.10kV power distribution equipment real voltage analog current closed loop, it is characterized in that: comprise the power distribution cabinet system and the computer control system that true High-low voltage switch cabinet, consist of, described power distribution cabinet system comprises true 10kV voltage, 10kV voltage transformer (VT), isolating switch, signal acquisition module; The secondary side of described 10kV voltage transformer (VT) is connected with the bus bar side of true 10kV voltage, for obtaining the voltage signal of 10kV bus bar side, the auxiliary contact of described isolating switch is connected with the bus bar side of true 10kV voltage, for obtaining the close/minute status signal of each isolating switch auxiliary contact correspondence position main contact; The input end of described signal acquisition module is connected to the output terminal of described 10kV voltage transformer (VT) and isolating switch, the output terminal of described signal acquisition module is connected to described computer control system, described computer control system, for according to the close/minute status signal of above-mentioned voltage signal and isolating switch, is exported corresponding virtual power power supply.
2. 2. by the authentic training system of 10kV power distribution equipment real voltage analog current closed loop claimed in claim 1, it is characterized in that: described computer control system comprises upper PC, ethernet communication controller, computer control, PLC controller, wiring switching relay, virtual power power supply, analog loopback and fault display instrument table, described upper PC communicates to connect by ethernet communication controller and computer control, for arranging and each simulated failure state that resets; The output terminal of described PLC controller is connected with the control end of wiring switching relay, for the simulated failure state of upper PC setting is carried out to conversion and control and exports wiring switching relay to; Described virtual power power supply output required voltage; Described analog loopback is connected between virtual power power output end and the contact of wiring switching relay, to realize operation and the fault simulation of authentic 10kV distribution system; Described fault display instrument table and wiring switching relay join.
3. 3. by the authentic training system of 10kV power distribution equipment real voltage analog current closed loop claimed in claim 2, it is characterized in that: described analog loopback includes open circuit fault analog loopback, short-circuit fault simulation loop, reversed polarity fault simulation loop, negative-phase sequence fault simulation loop and voltage insulation decline fault simulation loop.
4. 4. by the authentic training system of 10kV power distribution equipment real voltage analog current closed loop claimed in claim 2, it is characterized in that: described open circuit fault analog loopback, short-circuit fault simulation loop consist of wiring switching relay contact serial or parallel connection circuit.
5. 5. by the authentic training system of 10kV power distribution equipment real voltage analog current closed loop claimed in claim 2, it is characterized in that: two interlock counter-contact of described reversed polarity fault simulation loop, the negative-phase sequence analog loopback wiring switching relay between analog loopback two ends by cross connection form.

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