Accelerator ground wire system based on EMC and design method

Abstract

The invention relates to an accelerator ground wire system based on EMC (Electro Magnetic Compatibility) and a design method, and the system comprises a universal ground net which is arranged at a universal equipment side and is a main grounding net of universal equipment, and the universal equipment is connected with the universal ground net through a low-voltage power distribution system of a power distribution room to realize safe grounding; the process ground net is laid nearby process power distribution equipment and is a main grounding net of the process power distribution equipment, the process equipment is connected with the process ground net through a grounding box, and differential grounding of the process ground net is achieved through the grounding box; and the grounding well is used for connecting the general ground screen and the process ground screen, realizing high-frequency isolation and power frequency combination between the general ground screen and the process ground screen, and serving as a grounding test point. The device can give consideration to safety protection and electromagnetic compatibility, and can be applied to the field of accelerator electromagnetic compatibility and grounding.

Description

technical field [0001] The invention relates to the technical field of accelerator electromagnetic compatibility and grounding, in particular to an EMC-based accelerator grounding system and a design method. Background technique [0002] With the development of technology, the electromagnetic interference problem of large scientific devices such as accelerators has become increasingly prominent - the system failure rate and electromagnetic noise level are high, which affects the quality of beam current and scientific research experiments. The ground wire is one of the important ways of electromagnetic interference, which is related to the safety protection and electromagnetic compatibility performance of the accelerator device. The accelerator device generally adopts the TN-S power distribution system - the equipment is connected to the PE line, and the overcurrent device operates and protects when a ground fault occurs. However, from the analysis of electromagnetic compati...

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Problems solved by technology

However, from the analysis of electromagnetic compatibility performance, this kind of ground wire structure will cause serious common ground impedance interference problems between equipment due to the long PE wire and high ground wire impedance.

For this reason, the accelerator device is usually laid with a dedicated ground grid. According to the TN-S repeated grounding method, the equipment side is grounded nearby, which alleviates the problem of high impedance of the ground wire, but will cause ground circulation interference; if only a dedicated ground grid is used, That is, the TT power distribution system, although it realizes the nearby grounding of equipment and alleviates the problem of ground circulation, it does not meet the requirements of power distribution safety regulations

In addition, the accelerator device system is huge and the equipment composition is complex. Due to the failure to adopt a reasonable ground wire scheme, it has become an important interference path-transient high voltage and high-frequency noise such as surges and bursts pass through the ground wire and cause equipment malfunctions , or even damage; at the same time, the conduction emission noise crosstalks through the ground wire, which affects the detection of weak signals and increases the difficulty of scientific research experiments

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