Ship high-power high-voltage AC dry load having excellent insulation property

Abstract

The invention provides a ship high-power high-voltage AC dry load having an excellent insulation property and used for detecting AC power of AC10kV or higher. A high-voltage resistor chamber is composed of a plurality of isolated high-voltage resistor compartments. The load branch in each high-voltage resistor compartment has a unique attribute which is one of a phase A, a phase B or a phase C. Ahigh-voltage contact chamber is electrically connected to the high-voltage resistor chamber. A three-phase voltage sensor and a three-phase current sensor are disposed on the inlet wire side of the high-voltage contact chamber. A low-voltage control chamber is electrically connected with the high-voltage contact chamber, and includes a PLC module, a signal isolator and an intermediate relay. The PLC module can collect the output signals of the three-phase voltage transformer and the three-phase current sensor in real time. The load can be improved in insulation property to the ground, reducesthe risks of phase-to-phase short circuits and short circuits to the ground, gives an early warning of a load short-circuit fault, avoids the operation of load equipment in a faulted state, and greatly prolongs the service life of the equipment.

Description

technical field [0001] The invention relates to the technical field of generator set detection, in particular to a marine high-power high-voltage AC dry load with excellent insulation. Background technique [0002] With the continuous development of modern science and technology, high-voltage alternating current is widely used in various fields of industry, and high-power high-voltage alternating current generation technology for ships has developed rapidly. Therefore, how to test the quality and safety of high-power high-voltage AC power supplies for ships is particularly important. [0003] At present, the domestic equipment for testing the performance of high-voltage AC generator sets is mainly high-power high-voltage AC dry loads. The high-power high-voltage AC dry load adopts the parallel operation mode of several load branches, and each load branch is composed of "high-voltage fuses, high-voltage AC contactors and high-voltage resistors". In actual operation, by cont...

AI Technical Summary

Problems solved by technology

[0005] However, there are huge differences in the manufacturing process of high-voltage insulation boards, especially when used outdoors, the insulation performance of the insulation boards will be largely restricted by the humidity and pollution of the external environment; at the same time, due to the existing load design structure and Due to the restriction of design space, the electrical clearance and creepage distance of the three-phase resistance in the load branch are small

Based on the above-mentioned current situation of use, the overall insulation performance of the existing high-voltage AC dry loads will decrease year by year, and sometimes it cannot even meet the normal operation requirements, which brings great safety hazards to the normal operation of the load and even the test object.

In addition, the load also has outstanding problems such as "the electrical safety performance of the equipment during operation cannot be monitored in real time", "part of the resistance wire of the load branch is not easy to be found, causing the equipment to run with a disease" and other outstanding problems

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