Why do many companies have to pay unfair electricity bills?

From small households to large enterprises, energy consumption has always been a concern for everyone. The energy consumption of Chinese enterprises has always been high, and the country has also worked hard to encourage enterprises to reduce energy consumption. We need to pay for our own household electricity, so who should "pay" for the extra electricity wasted by enterprises? If these issues are ignored, enterprises will have to spend more money.

At present, my country's energy efficiency is only 33%, about 10 percentage points lower than that of developed countries. Among them, the unit energy consumption of major products in eight industries, including electricity, steel, non-ferrous metals, petrochemicals, building materials, chemicals, light industry, and textiles, is 40% higher than the international advanced level on average; the unit comprehensive energy consumption of steel, cement, and paperboard is 21%, 45%, and 12% higher than the international advanced level, respectively.

Electricity price category

The current sales electricity price categories

• Electricity for residential use;

• Non-residential electricity consumption;

• Commercial electricity;

• Non-industrial and general industrial electricity;

• Large industrial electricity;

• Electricity for agricultural production.

This article only deals with the electricity consumption of enterprises, and does not elaborate on other non-enterprise electricity consumption. The electricity consumption subject to the large industrial electricity price is the electricity consumption of all industrial productions that use electricity as the motive force, or electric smelting, baking, welding, electrolysis, and electrification, and the power transformer capacity is 315 kVA or above.

• Non-industrial general industrial electricity: 0.6-0.7 yuan/kWh;

• Large industrial electricity: 0.5-0.6 yuan/kWh;

• Electricity for agricultural production: 0.4-0.5 yuan/kWh;

• Non-residential lighting electricity: 0.7-0.8 yuan/kWh;

After being bombarded with data, as a reader, do you have such a feeling - in this era of rising prices, it turns out that the cost of electricity is not cheap! So what are the reasons for the waste of electricity?

To sum up, the power quality is low and the power quality is poor!

1. Impact of transient voltage and surge current: Industrial enterprises have a large number of electrical equipment, frequent startups, and large load changes, which can easily impact the power grid, causing severe transient voltage and surge current conditions, seriously threatening and affecting the normal operation of other equipment, causing the temperature of the motor and the speed of the meter to increase, thereby wasting electricity and reducing the power efficiency of the system.

2. Impact of harmonics: Industrial automation uses nonlinear devices such as rectifiers, inverters, and thyristors, which will generate a large amount of harmonics, distorting the waveforms of system voltage and current and deteriorating power quality. This not only increases power consumption, but also affects power safety and equipment service life. The harm of harmonics has become the most important public hazard in the power grid.

3. Unstable power supply voltage: The industrial transmission and transformation power grid system has a large load and a wide distribution, and the peak and trough periods of electricity consumption are very obvious. Therefore, the voltage fluctuates greatly during the peak and trough periods of electricity consumption, which will waste electricity to a great extent and deteriorate the quality of electricity use. It will not only increase power consumption, but also affect the service life and safety of electrical equipment.

4、三相不平衡的影响：三相负荷保持平衡是节约能耗、降损降价的基础。三相负荷不平衡将产生不平衡电压，加大电压偏移，增大中性线电流，从而增大线路损耗。实践证明，一般情况下三相负荷不平衡可引起线损率升高2％-10％，三相负荷不平衡度若超过10％，则线损显著增加。

After the conceptual description, you may find the term power quality abstract. It doesn’t matter. Good articles are easy to understand and well illustrated. Below we use a set of illustrations to illustrate the economic benefits brought about by effective power quality management after monitoring power quality - saving money!

The following is an example of a company using the power quality analyzer E6500 provided by Guangzhou Zhiyuan Electronics Co., Ltd. to detect the company's electricity consumption:

E6500 detects the line loss analysis of the enterprise, including harmonic line loss analysis, harmonic pollution degree analysis, unbalanced line loss analysis, etc. Through the harmonic content test and analysis after effective harmonic control, the enterprise saved a lot of unnecessary economic waste, saving more than 10 million yuan in losses per year; E6500 comprehensively decomposes power, and makes detailed statistics on the power loss caused by various types of parameters, and supports harmonic pollution and unbalanced pollution assessment functions. At the same time, it intuitively displays the economic losses caused by energy loss in the form of currency.

The above picture shows the test of a case of ZHIYUAN Electronics' E6500 power quality analyzer. With its long-term accumulation in the field of power electronics and the concept of embedded instrument design, ZHIYUAN Electronics has launched the epoch-making E6500 power quality analyzer, which meets the industry's measurement needs for power quality, harmonics, voltage, current, three-phase unbalance, flicker, reactive line loss analyzers, etc., and leads the power electronics industry into the era of full-line testing.