Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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孤网电力负荷平衡技术及应用

来源:电工电气发布时间:2017-11-17 09:17 浏览次数:8
孤网电力负荷平衡技术及应用
 
赵中原,李晓明, 李成博,王新宝
(南京南瑞继保电气有限公司, 江苏 南京 211102)
 
    摘 要:企业自备电厂在外网联接或者孤网运行时,存在电压稳定、频率平衡问题。提出基于晶闸管的快速、灵活控制的电子负荷技术,通过三层策略控制来解决孤网平衡问题。该方案以电子动态负荷调节为平衡主要手段,同时配置孤网稳定装置,协调发电机组和负荷数量,另外还配置了频率紧急控制作为最后防线。应用效果表明,电子负荷快速平滑跟踪冲击性负荷动态变化,可以使孤网高可靠性运行、频率稳定。
    关键词:孤网;电子负荷;电网稳定
    中图分类号:TM762     文献标识码:B     文章编号:1007-3175(2017)11-0033-05
 
Power Load Balancing Technique and Application of Islanded Network
 
ZHAO Zhong-yuan, LI Xiao-ming, LI Cheng-bo, WANG Xin-bao
(Nari-Relays Electric Co., Ltd, Nanjing 2111 02, China)
 
    Abstract: Enterprise-owned power plants usually get voltage stability and frequency balance problem when accessing the external network or operating in an islanded mode. This paper proposed a thyristor-based electronic type of load with fast and flexible controllable features. Three-layer control strategy as a total solution was presented to effectively solve the problem of islanded network. The main balancing means of this strategy is to adjust electronic dynamic load, to configure islanded network stable device, to coordinate generator sets and load quantity and to configure frequency emergency control as the last defensive line. The application result shows that the electronic type of load is a fast and smooth way to balance the dynamic change of the impact load, which can make the isolated network operate in high reliability and get frequency in stable range.
    Key words: islanded network; electronic load; power grid stability
 
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