Design And Research On The Security Guard AC Power Supply Of 300MW Power Plant

In order to prevent the power plant enterprises in the power plant damage, the operation of the unit is damaged, so as to set up the guarantee of emergency power supply power to the important plant with load, called security power. DC power supply and AC power supply are the two major forms. Generally speaking, the diesel generator can be quickly opened and the power to switch the external power supply is an important part of the AC power supply configuration. Security AC power source is responsible for supply in the whole plant, a large area power outage assurance unit safety shutdown of lubrication oil pump motor, a top shaft oil pump motor, gear motor and some other alternating accident security load.In this paper, we have made a detailed analysis and design of the AC power supply of 300MW power plant by referring to the relevant literature. The reconstruction of power plant security power is of great significance.First, this paper discusses the current status of the security power supply in the whole country, introduces the types and the importance of the accident security load. By comparing the advantages and disadvantages of various configuration forms, the impact of the distribution system is described.Secondly, the important role of the diesel generator in AC power supply system is introduced. To adopt the cross state of calcium carbide plant phase II#3.#4 machine Wilson Hong Kong Co., Ltd. FG Wilson of P1100E1 diesel generator set for example in detail and explore the diesel principle of generator, diesel generator set, diesel generator performance and structure, diesel generator operation requirements and the way. and by diesel generator load calculation basis for judging the purchase of diesel generating set, indicating that the diesel generators use daily attention.Thirdly, the advantages and disadvantages of several switching modes are analyzed, and the advantages and disadvantages of several switching modes are analyzed, and the fast dynamic response speed is improved, and the reliability of the ATSE is not influenced by DCS and circuit breaker.In the end, the problem of the security power supply connection reconfiguration is put forward according to the different types of security power supply. In order to improve the function of DCS and ATSE and diesel engine dynamic logic, and ensure the safety of the system under normal conditions, the operation mode of the whole security power system is presented.