In the power supply and distribution system of the factory, power transformers and distribution lines consume the most energy. Due to the change of market demand and factory production technology, the capacity of power transformers configured according to design often does not match the actual operation, such as excessive transformer capacity, low load rate and large transformer loss; The thickness and length of distribution lines are unreasonable and irregular, which also leads to a significant increase in line loss.

2. The equipment configuration is unreasonable, and the situation of "big horse-drawn car" is serious.

Most of the electrical equipment in domestic industrial enterprises is designed at full load, and the rated power is generally too high, so the actual operation efficiency is low. The efficiency of motors, which account for 60%-70% of China's total industrial electricity consumption, is usually less than 75%, and the situation of "big horse-drawn car" and low load operation is quite common. In this state, a considerable part of the electric energy consumed by the motor is wasted in the form of heating, iron loss, copper loss, noise and vibration.

3, electrical equipment aging

At present, there are many general equipment such as transformers, motors, fans, pumps, compressors and electric welding machines in industrial and mining enterprises in China, which belong to the sixties and seventies. Some equipment and power supply lines are very old. These devices and power supply lines have low efficiency, high power consumption, great waste and great power saving potential.

4. The operation process of fluid equipment is unreasonable.

Fan, pump, compressor and other general mechanical drag equipment are the most important terminal electrical equipment in China. According to statistics, the installed capacity of fans and pumps reached 65.438+0.6 billion kilowatts, accounting for 20% of the national electricity consumption. However, most of these devices are designed to run at fixed power, but the pressure or flow required for actual operation is not fixed, and most of them are lower than the rated power supply of the motor, which is a serious waste of electric energy and has great potential for saving electricity. 1, the influence of transient voltage and surge current

There are a large number of electrical equipment in industrial enterprises, which are frequently started, and the load changes greatly, which is easy to impact the power grid, causing serious transient voltage and surge current, seriously threatening and affecting the normal operation of other equipment, leading to the waste of electric energy caused by the acceleration of motor temperature rise and meter speed, and the decline of system electricity efficiency.

2, the influence of harmonics

The use of nonlinear devices such as rectifier, frequency converter and thyristor in industrial automation will produce a large number of harmonics, which will distort the voltage and current waveforms of the system and worsen the power quality, which will not only increase the power consumption, but also affect the power safety and the service life of the equipment. Harm of harmonics has become the most important public hazard in power grid.

3. The power supply voltage is unstable

The industrial power transmission and transformation network system is heavily loaded and widely distributed, and the distribution period of power consumption is very obvious. Therefore, the voltage fluctuates greatly during the peak and valley periods, which will waste power to a great extent, deteriorate the quality of power consumption, not only increase the power consumption, but also affect the service life and safety of electrical equipment. SYS-SAVER power grid safety economizer, harmonic passive economizer or active economizer.

(4) Lighting energy-saving series

Energy saving lamp, electrodeless lamp, magic lamp.