introduction

　　Wuhan Nanhua Huanggang Jiangbei Shipbuilding Co., Ltd. was acquired by Wuhan Nanhua Express Ship Engineering Co., Ltd. and invested and transformed into a modern medium-sized shipbuilding enterprise.

　　1. Current situation analysis

　　High-voltage power supply equipment requires power-consuming devices as simulated loads for electrical performance testing. At present, there are two main power-consuming devices: one method is to convert high-voltage electricity into low-voltage electricity through a transformer, and to test through a low-voltage load, but this method requires the addition of a high-power transformer, which results in high investment costs; the other is to use semiconductors The power element is directly used as a high-voltage load. This method can meet the needs of low-power load testing when testing the electrical performance of high-voltage generators or other high-voltage power equipment, but cannot meet the needs of high-voltage and high-power loads of 1MW and above. The need for testing. The company found a large number of manufacturers in the market, seeking a simple, reliable, low-cost high-power consumption device to meet the needs of electrical performance testing of its high-voltage high-power generators or other high-voltage power supply equipment. Through comparison, the FZS-2000 load test device of Dayu Electric was finally selected.

　　2. The selection and principle of the plan

　　The resistive load of the FZS-2000 load test device is composed of three independent adjustable water resistance load buckets, three main control contactors, an air compressor, and an on-site control power distribution cabinet. The above equipment is integrated in a container. , Can be carried by car for long-distance transportation. The inductive load is composed of three independent adjustable-capacity reactors, three main control contactors, etc. The adjustable water resistance load bucket communicates with the computer through PLC, which can realize remote control adjustment.

　　FZS-2000 load test device parameters are as follows:

　　The equipment is suitable for generator voltage: 380~440V, 50~60Hz.

　　Active resistance load: 2000KW, reactive inductive load: 1430KVar.

　　Equipment overload capacity: 10% overload, allowed continuous 1 hour, short-term overload 30-50%.

　　Working mode: continuous work without interruption.

　　Each load or reactor is individually loaded and unloaded and can be successively increased two or three instantaneous loading and one-time instantaneous unloading experiments. For each load or load reduction, the input load size and power factor can be arbitrarily set according to the size of the ship power station of different capacity. During the test, the resistance load and the inductive load can be adjusted separately in the field or in the control room, and the equipment operating parameters can be displayed. , Power, voltage, current, frequency, power factor and other working status and fault alarms.

　　3. Concluding remarks

　　Since the equipment was put into use in 2009, it has excellent performance, high cost performance, and good after-sales service, which has won unanimous praise from customers.