摘要
将电网中不对称负荷产生的基波负序电能作为研究对象,以合理计量电能为研究目的,分析了不对称负荷产生的负序电能对电能计量的影响,针对现有有功电能计量方法存在的问题,提出了一种考虑不平衡责任的奖罚性电能计量新方法。采用功率分解的方法将PCC点处的负序有功功率分解为系统侧和用户侧产生的负序有功功率。基于IEEE Std.1459-2010功率理论提出了一种定量评估不平衡责任的新指标—负序视在功率,给出了不平衡责任的具体计算方法,并根据不平衡责任值设置了奖罚系数的参考值。设计具体的仿真算例,验证了在负序污染严重的电网中,采用所提奖罚性电能计量新方法更加公平、合理。
Taking the fundamental negative-sequence electric energy generated by asymmetric load in power grid as the research object,and aiming at the reasonable metering of electric energy,the influence of negative-sequence power generated by asymmetric load on the metering of electric energy is analyzed.In this paper,a novel method of rewarding and punishing electric energy metering considering unbalanced responsibility is proposed considering the existing problems of active power metering methods.The power decomposition method is adopted to decompose the negative-sequence active power at the PCC point into the utility side and the customer side negative-sequence active power.Based on IEEE Std.1459-2010 power theory,a novel index of quantitative assessment of unbalanced responsibility,negative-sequence apparent power,and a specific calculation method of unbalanced responsibility are given,and the reference value of reward and punishment coefficient is set according to the unbalanced responsibility value.A concrete simulation example is designed to verify that the novel method of rewarding and punishing electric energy metering is more fair and reasonable in the power grid with serious negative-sequence pollution.
作者
脱长军
田铭兴
孙立军
Tuo Changjun;Tian Mingxing;Sun Lijun(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《电测与仪表》
北大核心
2021年第11期150-156,共7页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51367010,51867012)
甘肃省科技计划资助(17JR5RA083)
甘肃省重点研发计划资助(18YF1FA058)
兰州交通大学优秀科研团队项目资助(201701)。
关键词
负序电能
电能计量
负序视在功率
不平衡责任
奖罚系数
negative-sequence electric energy
electric energy metering
negative-sequence apparent power
unbalanced responsibility
reward and punishment coefficient
