TCEC1672018直流配电网与交流配电网互联技术要求35

ICS29.240.01F21备案号：53939-2016准T/CEC167—2018直流配电网与交流配电网互联技术要求TechnicalrequirementsforinterconnectionbetweenDCdistributionnetworkandACdistributionnetwork2018-04-01实施中国电力企业联合会发布2018-01-24发布T/CEC167—2018I目次前言···································································································································································II直流配电网与交流配电网互联技术要求·········································································································11范围······························································································································································12规范性引用文件··········································································································································13术语和定义··················································································································································14一般规定······················································································································································25技术要求······················································································································································25.1交直流互联方式·········································································································································25.2交直流互联电压·········································································································································35.3交直流互联装置·········································································································································45.4无功配置要求············································································································································55.5保护配合···················································································································································55.6接地要求···················································································································································6T/CEC167—2018II前言本标准按照GB/T1.1—2009《标准化工作导则第1部分：标准的结构和编写》给出的规则起草。请注意本标准的某些内容可能涉及专利。本标准的发布机构不承担识别这些专利的责任。本标准由中国电力企业联合会归口。本标准主要起草单位：中国电力科学研究院有限公司、国网江苏省电力有限公司（电力科学研究院、常州供电分公司）、国网湖北省电力有限公司（经济技术研究院）、南瑞集团有限公司（中电普瑞科技有限公司）、国网山东省电力有限公司（泰安供电分公司）、西安交通大学、北京交通大学。本标准主要起草人：吴鸣、孙丽敬、侯义明、李蕊、张海、焦在滨、王轩、陈亮、盛万兴、刘海涛、蔡杰、罗国敏、季宇、吕志鹏、黄强、袁晓冬、李强、陆政、张伟、宋振浩、单来支。本标准为首次发布。本标准在执行过程中的意见或建议反馈至中国电力企业联合会标准化管理中心（北京市白广路二条一号，100761）。T/CEC167—20181直流配电网与交流配电网互联技术要求1范围本标准规定了直流配电网与交流配电网互联技术涉及的交直流互联方式、交直流互联电压、交直流互联装置、无功配置、保护配合、接地等技术要求。本标准适用于标称电压±100kV及以下直流配电网与频率为50Hz、标称电压110kV及以下交流配电网的互联。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。GB/T156标准电压GB/T2900.50电工术语发电、输电及配电通用术语GB/T12325—2008电能质量供电电压偏差GB/T12326电能质量电压波动和闪变GB/T14285继电保护和安全自动装置技术规程GB/T14549电能质量公用电网谐波GB/T15543电能质量三相电压不平衡GB/T15945电能质量电力系统频率偏差GB/T24337电能质量公用电网间谐波GB/T20989高压直流换流站损耗的确定GB/T30553基于电压源换流器的高压直流输电GB/T34139柔性直流输电换流器技术规范IEC62747用于高压直流（HVDC）系统的电压源换流器（VSC）术语［TerminologyforVoltage-sourcedConverters（VSC）forHighVoltageDirectCurrent（HVDC）Systems］T/CEC107直流配电电压DL/T836（所有部分）供电系统供电可靠性评价规程DL/Z1697柔性直流配电系统用电压源换流器技术导则3术语和定义下列术语和定义适用于本文件。3.1系统标称电压systemnominalvoltage用以标志或识别系统电压的给定值。3.2电压偏差voltagedeviation实际运行电压对系统标称电压的偏差相对值，以百分数表示。［GB/T12325—2008，定义3.4］T/CEC167—201823.3交直流电压转换比AC/DCconversionratio交直流互联系统交流端口标称电压幅值与直流端口标称电压之比。计算公式为：acac/dcdc2UMU＝式中：ac/dcM——交直流电压转换比；acU——交流端口标称电压有效值，单位为伏（V）；dcU——直流端口标称电压，单位为伏（V）。注：如直流侧采用对称单极母线结构，直流端口标称电压指正直流母线与负直流母线之间电压差的绝对值。4一般规定4.1直流配电网与交流配电网互联应保障交流配电网、直流配电网的安全、可靠、高效运行。4.2直流配电网与交流配电网互联运行时，应能够各自独立隔离故障，降低互联影响。4.3直流配电网与交流配电网互联宜遵循电压匹配、传输容量相互适应的原则。4.4交直流互联电压的确定需要考虑现有交流电压和直流电压序列、分布式电源及用户的便利接入。4.5交直流互联装置技术要求的确定需要综合考虑技术发展和设备制造水平等因素。4.6直流配电网与交流配电网互联配置的继电保护应满足可靠性、选择性、灵敏性和速动性的要求。4.7直流配电系统的接地方式应与交流系统接地方式、交直流换流器类型、换流器拓扑结构以及对直流系统的可靠性要求与绝缘设计相互协调，统筹考虑。5技术要求5.1交直流互联方式5.1.1交直流典型互联方式如下：a）经单向功率传输换流器直接互联；b）经1:1联接（换流）变压器与单向功率传输换流器隔离互联；c）经升压/降压联接（换流）变压器与单向功率传输换流器隔离互联；d）经双向功率传输换流器直接互联；e）经1:1联接（换流）变压器与双向功率传输换流器隔离互联；f）经升压/降压联接（换流）变压器与双向功率传输换流器隔离互联。5.1.2交直流互联典型拓扑结构如下：a）AC-DC。适用于交流型负荷和分布式电源所占比重较大，且存在一定数量的直流型负荷和分布式电源的配电区域。典型拓扑结构如图1所示。b）DC-AC。适用于直流型负荷和分布式电源所占比重较大，且存在一定数量的交流型负荷和分布式电源的配电区域。典型拓扑结构如图2所示。c）AC-DC-AC。可适用于两个交流配电网互联合环运行的配电区域，也可适用于直流型负荷和分布式电源较为集中的高可靠型供电区域。典型拓扑结构如图3所示。其他互联的拓扑结构一般是AC-DC、DC-AC、AC-DC-AC三种典型结构的组合。5.2交直流互联电压在本标准5.1.1给出的d）、e）两种互联方式下，直流配电网与交流配电网对应的标称电压，如表1所示。T/CEC167—20183图1交直流互联AC-DC典型拓扑结构示意图图2交直流互联DC-AC典型拓扑结构示意图图3交直流互联AC-DC-AC典型拓扑结构示意图表1交直流互联电压直流标称电压kV交流标称电压kV±100110±50（备选）—±3535±2020±102010±6（备选）6±33±1.51.5T/CEC167—20184表1（续）直流标称电压kV交流标称电压kV30.75（0.4对应单相交流系统）0.38（0.22单相）注1：标称电压20kV的单极母线结构的直流配电网与标称电压±10kV的对称单极结构的直流配电网均可与10kV交流配电网互联。注2：标称电压3kV的单极母线结构的直流配电网与标称电压±1.5kV的对称单极结构的直流配电网均可与1.5kV交流配电网互联。注3：标称电压400V的直流配电网可与单相220V交流配电网互联。注4：标称电压±50kV的直流配电网推荐采用降压变压器与标称电压35kV的交流配电网互联，也推荐采用升变压器与标称电压66kV的交流配电网互联。5.3交直流互联装置5.3.1交直流互联装置一般包括联接（换流）变压器、换流器、直流电抗器、滤波电抗器、直流断路器等主要部件。交直流互联装置可以是由独立完成单一功能的多个部件组成，也可以是多个功能集成的单个部件。5.3.2容量要求5.3.2.1