【摘要】 随着输电电压等级的提高,变电站运行时的可听噪声污染问题越来突出,特高压变压器是特高压变电站内主要噪声源,准确测量其运行状态下的噪声值对变电站噪声控制具有重要指导作用。文中以某1 000 kV特高压变压器为对象,采用声压法、离散点法声强测量和扫描法声强测量方法,在变电站现场对同台特高变压器运行时的噪声声功率进行测量,研究这3种不同方法的适用性。测量结果表明,在测量现场存在外界噪声干扰和防火墙声反射作用下,声压法测量结果误差较大,声强测量结果准确。说明2种声强测量方法都可适用于某1 000 kV特高压变压器可听噪声声功率的现场测量,扫描法声强测量时间要大大少于离散点法声强测量。更多还原

【Abstract】 The UHV power transformer is the main noise source in a UHV power substation. Accurate measurementof the transformer’s sound power is very important for noise control of power substation. In this study,the sound pres-sure based method,the discrete point sound intensity based method,and the scanning sound intensity based methodwere used to measure the sound power of a 1 000 kV UHV power transformer field. Results show that in the externalnoise interference and firewall reflecting sound environment,the latter two measurement methods based on sound in-tensity gain higher accuracy than the sound pressure based measurement method,indicating the two sound intensitybased methods are all suitable for in-site sound power measurement of audible noise from the 1 000 kV UHV powertransformer. In addition,the scanning sound intensity based method spent the shortest measurement time.更多还原