Application of Harmonic Elimination Reactive Power Compensation in Sewage Treatment Plants

With the increasing emphasis on environmental protection in our country, there are more and more sewage treatment plants in various regions. Currently, the energy shortage situation in various cities is becoming increasingly apparent, which requires sewage treatment plants to use less energy to obtain greater profits.

Currently, many domestic sewage treatment plants are forced to shut down due to their inability to bear high operating costs, resulting in previous investments not receiving the expected benefits. This not only affects the effectiveness of sewage treatment, but also causes certain economic losses. Therefore, optimizing electrical energy efficiency, saving energy costs, and reducing treatment costs are important means to ensure the normal operation of sewage treatment plants.

Existing problems

At present, reactive power compensation can be divided into centralized compensation and decentralized compensation. However, most sewage treatment plants use decentralized compensation or simply do not use reactive power compensation due to cost considerations. As a result, the problem is that the power factor cannot meet the requirements, which increases the reactive power loss of the power supply system, increases the operating costs of sewage treatment plants, increases the copper loss of transformers, increases voltage loss, and reduces the quality of power supply. Although adopting decentralized compensation can to some extent meet the compensation effect of load distribution lines, the installation location is too scattered, and the later operation and maintenance workload is very large.

In sewage treatment plants, distribution stations play an important role, and the load of sewage treatment plants is generally concentrated. Distribution stations are usually selected at the center of the load. At this time, using low-voltage distribution centralized compensation has a significant effect on reducing transformer copper loss, and is easy to maintain and manage. At the same time, it can also improve transformer utilization, reduce reactive power loss in the power supply system, improve power factor, reduce voltage loss, and improve power supply quality.

Reactive power compensation design

Based on the load type and transformer capacity of a sewage treatment plant in Jiangnan, the reactive power compensation design capacity configuration between the incoming cabinet and the load is as follows:

Product introduction

SLG series harmonic elimination reactive power compensation components

SLG harmonic elimination reactive power compensation component is a reactive power compensation product specifically designed for the harmonic and power factor problems in 0.4KV low-voltage distribution networks with severe harmonic pollution. It achieves power factor improvement, effective harmonic suppression, reduces line loss, and improves power quality.

The harmonic elimination reactive power compensation component includes a filtering compensation circuit composed of a filtering reactor and a low-voltage filtering power capacitor. This series of components is a filtering compensation equipment suitable for 0.4KV low-voltage distribution networks. The compensation device in this series has complete protection measures, high degree of automation, and can automatically exit work in the event of external power outages. It can automatically resume operation after power transmission.

Technical Parameter

LBT series dynamic switching unit

The LBT series dynamic switching unit is a contactless, highly reliable fast switching switch used in dynamic power factor compensation equipment. Especially suitable for situations that require quick and wear free switching, typical applications include lifting equipment, pumps, and welding equipment with frequent reactive power changes.

Technical Parameter

Design Diagram

Project summary

By conducting centralized reactive power compensation in the sewage treatment plant, the power factor at the incoming cabinets of each transformer has been increased to 0.98, and the electricity consumption of the sewage treatment plant has met the reward requirements of the power supply department, bringing practical economic benefits to the enterprise; At the same time, reactive power compensation devices can not only improve power factor, save active power, reduce line and transformer losses, and reduce operating costs, but also enhance the sewage treatment capacity of sewage treatment plants, reduce investment costs of sewage treatment equipment, reduce voltage losses, improve operating conditions, and ensure the good and effective operation of sewage treatment plants.

With the rapid development of our country's economy, people's environmental awareness is constantly improving. The sewage treatment industry should also actively carry out energy-saving transformation, reduce operating costs, save energy, and better serve the people.