| 引用本文: | 李升,姜程程,赵之瑜,李子瑜.分布式光伏电站接入低压配电网系统暂态电压稳定性研究[J].电力系统保护与控制,2017,45(8):67-72.[点击复制] |
| LI Sheng,JIANG Chengcheng,ZHAO Zhiyu,LI Ziyu.Study of transient voltage stability for distributed photovoltaic power plant integration into low voltage distribution network[J].Power System Protection and Control,2017,45(8):67-72[点击复制] |
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| 摘要: |
| 运用Matlab SPS建立了分布式光伏电站接入0.4 kV低压配电网的典型系统仿真模型。运用时域仿真法考察了光伏电站接入配电网的电缆线路在发生短路、闪络以及断线故障时对光伏电站出口母线暂态电压稳定性的影响。当电缆线路发生短路和断线故障时，光伏电站出口母线会发生电压幅值不断增大的电压失稳现象。而当电缆线路发生闪络故障时，投入重合闸可使光伏电站出口母线电压快速恢复。当光照强度发生大幅度突降时，光伏电站出口母线电压幅值会发生跌落，电压跌落程度主要取决于正常运行时光伏有功出力的大小。一般而言，当光伏出力为数十kW及以下时，光强突降并不会导致光伏电站出口母线电压发生失稳或崩溃。 |
| 关键词: 分布式光伏电站 低压配电网 暂态电压稳定 故障 光照强度 |
| DOI：10.7667/PSPC160533 |
| 投稿时间：2016-04-15修订日期：2016-05-24 |
| 基金项目:江苏省配电网智能技术与装备协同创新中心开放基金项目(XTCX201613);江苏高校品牌专业建设工程资助项目(PPZY2015A031);南京工程学院科研创新基金面上项目(CKJB201208);江苏省高校专业学位研究生创新计划项目(SJLX15_0731) |
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| Study of transient voltage stability for distributed photovoltaic power plant integration into low voltage distribution network |
| LI Sheng,JIANG Chengcheng,ZHAO Zhiyu,LI Ziyu |
| (School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China) |
| Abstract: |
| A typical system simulation model of distributed photovoltaic power station is established by using MATLAB SPS, which is connected to 0.4 kV low voltage distribution network. The effects on PV power station exit bus transient voltage stability when short circuit, flashover and disconnection faults occur in cable lines, after PV has connected into the distribution network, are investigated by using time domain simulation method. When short-circuit and disconnection fault of cable line occurred, the PV power station exit bus voltage amplitude will increase continuously and lost stability. However, when flashover fault has occurred, inputting reclosure can make the PV power station exit bus voltage recover quickly. When light intensity has greatly dropped, PV power station exit bus voltage amplitude will drop, whose degree is mainly determined by the magnitude of active power output in normal operation. Generally, when PV output has tens of kilowatts and below, light dump won’t lead to PV power station exit bus voltage unstable or collapse. This work is supported by the Open Research Fund of Jiangsu Collaborative Innovation Center for Smart Distribution Network (No. XTCX201613), the Jiangsu University Brand Specialty Construction Project (No. PPZY2015A031), the Science Research Innovation Foundation of Nanjing Institute of Technology (No. CKJB201208) and the Jiangsu University Postgraduate with Major Degree Innovation Project (No. SJLX15_0731). |
| Key words: distributed photovoltaic power station low voltage distribution network transient voltage stability fault light intensity |
