1、 Company Introduction

Lanzhou New Area Shuangliang Thermal Power Co., Ltd. was established inOn July 31, 2013, it was fully established by Gansu Shuangliang. According to the special heating plan of Lanzhou New Area, the company is responsible for the construction and operation management of the centralized heating project in the area south of Weishi Road in Lanzhou New Area. The construction and operation of this project can maximize the restriction of gradually settled enterprises setting up scattered coal-fired small boiler rooms, thereby reducing environmental pollution to the urban area, improving environmental hygiene, enhancing winter air quality, improving heating quality, and realizing the utilization of low-quality fuels and garbage.

2、 There are problems

The heating station of Shuangliang Thermal Power in Lanzhou New Area is mainly composed ofThree 10/0.4 KV transformers are used for power supply, and the low-voltage side of the transformers is divided into two branches: power and lighting, each equipped with active and reactive power metering devices. The water pumps, fans, and other equipment in the heating station are equipped with multiple low-voltage three-phase asynchronous motors, with a power factor often around 0.7, resulting in significant energy loss on the power branch line. And the power factor is lower than the assessment standard of the power industry department (0.9).

3、 Reactive power compensation design

Based on the load type and transformer capacity, the design capacity configuration for reactive power compensation between the incoming cabinet and the load is as follows:

3.1 Product Introduction

The LBG series harmonic elimination reactive power compensation is a reactive power compensation product specifically designed to address harmonic and power factor issues in 0.4KV low-voltage distribution networks with severe harmonic pollution. It achieves power factor improvement, effective harmonic suppression, reduced line loss, and improved power quality.

The harmonic elimination reactive power compensation component includes a filtering reactor and a low-voltage filtering power capacitor to form a filtering compensation circuit. This series of components is suitable forThe filtering compensation equipment for 0.4KV low-voltage distribution network has complete protection measures and high automation level. It can automatically stop working in case of external power outage and resume operation automatically after power transmission.

Technical Specifications

3.2 Design Diagram

4、 Project Summary

　　The expected goal has been achieved, and the power factor at the incoming cabinets of each transformer has been improved to0.98, the electricity consumption of the enterprise has met the reward requirements of the power supply department, bringing actual economic benefits to the enterprise; At the same time, installing reactive power compensation devices in the heating system for reactive power compensation can not only improve the power factor, save active power, reduce line and transformer losses, reduce operating costs, but also increase the load capacity of the boiler room power supply and distribution equipment, reduce the investment cost of new boiler rooms, reduce voltage losses, improve operating conditions, and make it easier to start the circulating pumps and induced draft fans in the heating station.

With the rapid development of our country's economy, the contradiction between energy supply and demand is becoming increasingly prominent, and people's awareness of energy conservation is constantly improving. The heating industry should also actively carry out technological transformation, reduce production costs, save energy, and better serve the people.