How Do I Save Money on My Electric Bill?

The electricity bill is a document that the power supply department notifies the user of the electricity consumption of the user. The content of the electricity bill reflects the electricity usage of the electricity company within a certain period of time. It records the user's monthly electricity consumption. These records include contract capacity, maximum demand, power factor, power consumption, basic electricity charges and mobile electricity charges, etc., which can be used by the factory to evaluate whether the contract capacity is reasonable, the power factor is appropriate, and the peak. Whether the power demand is likely to be reduced, whether the two-stage time-use electricity pricing is reasonable, whether the production volume and power consumption are used to analyze whether the unit product consumes high energy, and whether the transformer device capacity is appropriate.

Electric bill

The electricity bill not only shows how much electricity the user uses, how much should be paid, but also a very good electricity test meter. Don't underestimate a thin electricity bill, it is an energy health checklist for energy users, and using the information in it can achieve the purpose of saving energy and saving money.

Basic electricity cost (capacity electricity price). At present, the electricity charges of large industrial users are based on the "two-part system". The so-called "two-part" electricity price means that the electricity price consists of two parts: the electricity cost and the basic electricity price. The electricity cost represents the variable cost portion of the cost of electricity sold, and the electricity cost is calculated based on the number of electricity measured by the customer's energy meter. The basic electricity cost is a fixed cost portion that represents the cost of electricity sold, based on the total capacity of the customer's power transformer Demand calculates its fixed electricity fee, also known as capacity electricity fee. The collection of basic electricity charges takes into account the level of user load utilization, which is a more scientific electricity price system that is currently adopted in most countries.

Electricity bill format

Electricity bills are used by power supply companies to inform customers of electricity consumption for a certain period of time.

Blank electricity bill

The format of the electricity bill is shown in Figure 1. The electricity bill is generally composed of the user's attribute column, electricity billing details column, and remarks column.

The main contents of the user attribute column are: user name, account number, power consumption category, billing period, meter reading area code, and settlement information. Among them, the account number, billing period, meter reading area code, etc. are unique numbers given to each user by power supply companies in order to facilitate the review and collection management. Different types of users have different charging periods. Generally, users with less power consumption, such as residential users, have a charging period of two months, and industrial, commercial, non-industrial, and other heavy-load users have a charging period of one month.

The electricity charge breakdown details column mainly reflects the user's electricity consumption details during the billing period, including peak valley level electricity, peak valley level electricity price, reactive energy quantity, power factor assessment standards and performance, receivable adjustment electricity charges, basic electricity charges, liquidated damages, and Total electricity bill.

Reminders and temporary notices of power supply services by power companies are usually reflected in the remarks column.

Electricity bill classification

The special terms in the electricity bill are relatively unfamiliar to power companies. Mastering the meaning of these terms and corresponding data will help the power companies to conduct scientific analysis of power consumption.

Electricity category. At present, there are six types of electricity consumption according to industry, namely industrial electricity, commercial electricity, residential electricity, irrigation and drainage electricity, non-industrial electricity and agricultural production electricity. Different electricity prices implement different electricity prices. Among them, industrial power is divided into general industrial power and large industrial power according to different power receiving capacity of users. In order to do good demand-side management, most provinces currently implement peak-valley flat power prices (referred to as peak-valley power prices) for large industrial users.

Power (P). Electricity is also called active electricity, which is the actual energy consumed by the electrical equipment. The amount of electricity in the electricity bill of an enterprise that implements peak-valley electricity prices is divided into three parts, namely peak-level electricity, flat-level electricity, and valley-level electricity.

Reactive power (Q). Reactive power is used to balance the reactive power consumed by electrical equipment. The greater the reactive power consumed by electrical equipment, the more reactive power the grid needs to provide. The increase in reactive power consumption reduces the operating efficiency of the power grid. Therefore, power supply companies require special transformer users who install transformers with a capacity of more than 100 kVA to perform local reactive power compensation, and the reactive energy is measured and measured by the reactive energy meter.

Power factor (cos). Power factor is an important indicator that reflects the reasonable use status, power utilization level and power management level of power equipment for power users. The closer the power factor of a user is to 1, the higher the efficiency of power consumption of the user equipment. The power factor is the ratio of the active power P to the apparent power S. The power factor can be expressed by the cosine of the phase difference angle between the load current I and the voltage U, that is, cos = P / S. Power supply companies have different assessment requirements for users of different power consumption categories, and reward users who have higher power factor performance than the assessment indicators, and punish them otherwise. The power factor assessment index of power supply enterprises for large industrial users is not less than 0.9.

Power loss (P loss). The variable loss power is the general term of transformer copper loss and iron loss. For a certain transformer, the iron loss is basically unchanged. Copper loss is related to the transformer load rate. In the electricity bill of the user whose metering point is set on the high-voltage side of the user's transformer, the statistical power has already included the variable power loss, and there is no need to recalculate the variable power loss. For users whose metering point is located on the low-voltage side of the transformer, the variable power loss needs to be calculated. At present, power supply companies mostly use the "transformer active and reactive power loss checklist" to determine the variable power loss. The power is compared with the loss table to determine the user's variable power. Under the same conditions, the energy loss of the energy-saving transformer is higher than that of the energy-consumption transformer. The loss is 25% 30% lower than that of S7 type, which has obvious energy saving effect.