架空电力线路和高压设备的无线电干扰特性第2部分:测量方法和极限测定程序

[中文适用范围]： 本CISPR 18技术规范部分适用于架空输电线路和高压设备产生的无线电噪声，这些噪声可能对无线电接收造成干扰。 本出版物涵盖的频率范围为0.15 MHz至3 GHz。 建议建立电力线和设备无线电噪声场的限值的一般程序，同时提供典型值作为示例，并说明测量方法。 关于限值的章节集中于低频和中频频段，仅在这些频段中，基于已确立的实践，有充分的证据可用。在30 MHz至3 GHz频段内，未给出保护无线电接收的限值示例，因为该频段中的测量方法和其他相关问题尚未完全解决。 现场测量和服务经验表明，正常运行情况下，频率高于300 MHz的电力线噪声水平极低，不太可能对电视接收造成干扰。 给出的限值示例值计算旨在为无线电频段（用于调幅广播）中适当发射机的认可服务区边界处的广播接收提供合理的保护程度，在可能遇到的一般最不利条件下。这些限值旨在为线路的规划阶段提供指导，并作为线路建成后及在其使用寿命内性能检查的国家标准或其他规范的参考。 用于检查是否符合限值的测量设备和方法应符合相应的CISPR规范，例如CISPR 16基础标准系列，见[1]。 [外文原描述]： CISPR TR 18-2:2017 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. CISPR TR 18-2:2017 which is a Technical Report, applies to radio noise from overhead power lines and high-voltage equipment which may cause interference to radio reception. The frequency range covered by this publication is 0,15 MHz to 3 GHz. A general procedure for establishing the limits of the radio noise field from the power lines and equipment is recommended, together with typical values as examples, and methods of measurement. The clause on limits concentrates on the low frequency and medium frequency bands and it is only in these bands where ample evidence, based on established practice, is available. No examples of limits to protect radio reception in the frequency band 30 MHz to 3 GHz have been given, as measuring methods and certain other aspects of the problems in this band have not yet been fully resolved. Site measurements and service experience have shown that levels of noise from power lines at frequencies higher than 300 MHz in normal operation are so low that interference is unlikely to be caused to television reception. The values of limits given as examples are calculated to provide a reasonable degree of protection to the reception of broadcasting at the boundary of the recognized service areas of the appropriate transmitters in the radio frequency bands used for a.m. radio broadcasting, in the least favourable conditions likely to be generally encountered. These limits are intended to provide guidance at the planning stage of the line and national standards or other specifications against which the performance of the line may be checked after construction and during its useful life. The measuring apparatus and methods used for checking compliance with limits should comply with the respective CISPR specifications, as e.g. the basic standards series CISPR 16, see [1]. This third edition of CISPR TR 18-2 is adapted to the modern structure and content of technical reports issued by IEC. The second edition of CISPR TR 18-2 underwent thorough edition and adaptation to modern terminology. This third edition now also covers an adequate method of measurement for radiated disturbances from HV overhead power lines and substations in the range 300 MHz to 3 GHz, since gap-type discharges can be a potential noise source disturbing modern digital radio communication. Keywords: radio noise from overhead power lines and high-voltage equipment