High-voltage electric debugging method for power generation project

Abstract

The invention discloses a high-voltage electric debugging method for power generation projects. The high-voltage electric debugging method comprises of the steps of debugging preparing, high-voltage equipment static testing and debugging, generator static testing and debugging, potential transformer (PT) nuclear phasing, starting testing, dynamic orientating and power generation grid connecting. Compared with the conventional debugging method, the debugging method is adopted, so that the speed of a high-voltage cabinet static test is high; the accuracy and the efficiency of the test are improved; the destroy to the cable in the conventional test is reduced; proper short circuits are selected for the test, and a differential test of a generator is carried out while a short-circuit test is carried out. In addition, a dynamic orientation method is adopted, so that the reliability and the security of the grid connecting are further improved; the working efficiency is high; the working period can be obviously saved; the manpower cost is saved; the debugging efficiency and the debugging quality are improved; and a whole process of the debugging work is in a safe, quick and excellent controlled state, so that the method is stable in operation, and high in accuracy, and safe and reliable.

Description

technical field [0001] The invention relates to a high-voltage electrical debugging method, in particular to a high-voltage electrical debugging method for power generation projects suitable for blast furnace TRT residual pressure power generation and blast furnace gas combustion steam turbine power generation projects. Background technique [0002] The economic benefits of blast furnace TRT residual pressure power generation and blast furnace gas combustion turbine power generation project are very significant. This project belongs to the energy-saving and comprehensive utilization of resources projects encouraged by the state. It is in line with the current energy policy of the state. It is an energy-saving project that the state promotes in the metallurgical industry. one. Under such a general background, blast furnace TRT residual pressure power generation and blast furnace gas combustion turbine power generation projects have been widely used in iron and steel enterpris...

AI Technical Summary

Problems solved by technology

[0004] 1. During the high-voltage cabinet test and commissioning process of the commissioning work, the test method of the power cable is a DC withstand voltage test. This test method not only cannot effectively find insulation defects such as water branches in the cross-linked polyethylene insulating material, but also Due to the effect of space charge, the existing internal weakness of the insulation is further developed and expanded, and the insulation performance is gradually attenuated to form a cumulative effect of insulation internal deterioration, which is easy to cause the cable to be put into operation in some places where problems should not occur under the action of AC voltage. Shooting will happen soon, and the danger is high;

[0005] 2. The current aspect of the relay protection test is to use a voltage regulator to adjust the current for the test. The test instrument has low precision and is greatly affected by the environment. The protection data produced has low precision and is prone to malfunctions such as misoperation and refusal to operate;

[0006] 3. The static test of the traditional high-voltage cabinet is to test the large current of the current transformer, the dynamic characteristics of the circuit breaker, the wiring of the voltage transformer, polarity inspection and ratio measurement, and the power frequency discharge of the overvoltage protector one by one. The current transformer and voltage transformer must be disconnected before inspection, which is not only cumbersome, but also labor-intensive;

[0007] 4. The short-circuit characteristic test of the generator start-up test is often carried out on the generator outlet cable or busbar, the test efficiency is low and the time is long

[0008] As mentioned above, the above-mentioned defects in the traditional generator debugging method lead to low work efficiency, long debugging time and low safety factor of the traditional debugging method, which cannot guarantee safe and reliable completion of the debugging work in a short time, seriously affecting the work progress

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