Comparative Analysis of Substation Noise Control Measures: Technical and Economic Evaluation of Sound Barriers and Soundproof Enclosures

I. Substation Project Overview

Substations are key nodes in power systems for transforming voltage, receiving, and distributing electrical energy. They are divided into step-up substations (generator end) and step-down substations (user end). The main equipment includes primary equipment such as transformers and circuit breakers, and secondary equipment such as relay protection devices. The noise generated by these devices during operation must comply with the requirements of standards such as the "Environmental Noise Standard" (GB 3096-2008).

II. Key Points of Noise Reduction Design

1. Design Principles

• Meets noise reduction targets and environmental standards without affecting equipment operation and maintenance.

• Employing mature technology and high-efficiency sound-absorbing materials, while also meeting safety and fire protection requirements.

• Balance noise reduction effectiveness with cost-effectiveness based on site conditions.

2. Design Steps

1. Identify and analyze the noise sources and characteristics of the equipment.

2. Determine the permissible noise level and required noise reduction for sensitive points.

3. Simulate sound field distribution and develop targeted solutions.

4. Select sound-absorbing and sound-insulating materials and structural methods.

III. Main Noise Analysis

1. Noise generation mechanism

• Electromagnetic noise : magnetostriction and electromagnetic force vibration of the iron core

• Mechanical noise : Equipment vibration is transmitted through the oil tank and base.

• Aerodynamic noise : generated by the operation of cooling fans and oil pumps.

2. Spectral characteristics

The equipment noise is characterized by low frequency (peak values ​​between 63-125Hz), has a long propagation distance and strong diffraction ability, and is difficult to control.

IV. Comparison of Core Noise Reduction Measures

1. Main governance measures

Photo of a noise barrier at the boundary of a substation of Sanyuan Environment.

2. Comparison of the advantages and disadvantages of the measures

Photo of a soundproof enclosure case study of a substation by Sanyuan Environment.

V. Summary

Substation noise control measures should be selected based on low-frequency characteristics . Sound barriers are suitable for noise reduction needs at the plant boundary, while soundproof enclosures are suitable for comprehensive noise control. The solution must balance noise reduction effect, equipment safety, cost, and construction feasibility, ultimately meeting environmental standards and the owner's actual needs.