AC power supply simulating characteristics of commercial power grid

Abstract

The invention relates to an AC power supply for simulating the characteristics of a mains power grid, including a power cabinet, an upper PC, a control system, a three-phase 380V AC power supply, an adjustable step-up transformer, a simulated power supply cable, a simulated user transformer and a simulated user load circuit. The three-phase 380V AC power supply is electrically connected to the adjustable step-up transformer, the adjustable step-up transformer is electrically connected to the simulated user transformer, and the simulated user transformer is also electrically connected to the simulated user load circuit. The control system includes a data processing module, a current detection module, a voltage Detection module, power analysis module, communication module and drive module. The present invention can effectively simulate various states of mains power grid operation and various electrical appliance operating conditions, so that the simulation work is more pertinent, and the detection and simulation data are closer to the characteristics of the mains power supply, thereby helping to reduce and avoid damage to the power grid Misoperation occurs during power supply operation, and targeted maintenance plans and maintenance training are carried out for the elimination of various faults.

Description

technical field [0001] The invention relates to an AC power supply for simulating the characteristics of a commercial power grid, and belongs to the technical field of power supply equipment for simulating a grid. Background technique [0002] During the operation of the mains power supply network, due to the large number of power users and the light distribution range, the power consumption of a single user is small, but the overall power consumption is large, and the distribution of power loads is relatively concentrated, and the electrical equipment is responsible for other reasons, which can easily lead to Many abnormal operation phenomena in the mains power supply network, such as voltage drop, abnormal grounding, harmonic interference, and instantaneous overload, will seriously affect the normal power supply of the grid, and even cause damage to grid equipment and user electrical equipment in severe cases. With the continuous expansion of power grid capacity, the incre...

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Problems solved by technology

[0002] During the operation of the mains power supply network, due to the large number of power users and the light distribution range, the power consumption of a single user is small, but the overall power consumption is large, and the distribution of power loads is relatively concentrated, and the electrical equipment is responsible for other reasons, which can easily lead to Many abnormal operation phenomena in the mains power supply network, such as voltage drop, abnormal grounding, harmonic interference, and instantaneous overload, will seriously affect the normal power supply of the grid, and even cause damage to grid equipment and user electrical equipment in severe cases. With the continuous expansion of power grid capacity, the increase in the number of complex electrical equipment used and the complexity of circuit users, and the high supply voltage of the power supply network, the affected area is large, which makes daily maintenance more difficult and leads to In addition, it is very difficult to measure and control the abnormal operation state of the power supply network, and it has caused great difficulties in the investigation of hidden dangers of power supply accidents and fault repair. Excluding training, but the current simulation equipment in use is often based on high-voltage transmission line simulation equipment, so there is a big difference between the operating status of the mains power supply grid, so the ability to simulate the operation of the mains power grid is weak, and the use effect cannot be achieved. To meet the needs of use, in order to deal with this problem, it is urgent to develop an inventive test device that can comprehensively simulate the operating state of the mains power grid to meet the needs of actual use

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