电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
10期
91-97
,共7页
崔红芬%汪春%叶季蕾%薛金花%杨波
崔紅芬%汪春%葉季蕾%薛金花%楊波
최홍분%왕춘%협계뢰%설금화%양파
分布式光伏%谐波%电压波动与闪变%电能质量
分佈式光伏%諧波%電壓波動與閃變%電能質量
분포식광복%해파%전압파동여섬변%전능질량
distributed PV%harmonics%voltage fluctuation and flicker%power quality
针对分布式光伏发电的谐波源特性和功率波动性,对分布式光伏接入对配电网谐波、电压波动和闪变的影响进行了分析,并分析了背景电能质量问题对光伏并网点电能质量的影响。同时在DIgSILENT/PowerFactory仿真平台上搭建了国际大电网会议(CIGRE)认为适合进行分布式发电接入配电网特性研究的典型配电网络结构,并根据IEC 61400-4-15标准在该平台上搭建了IEC电压闪变仪,对含多接入点分布式光伏发电的配电网的谐波传输和放大特性、电压波动和闪变的影响和评估进行了仿真分析。仿真结果表明,含多接入点分布式光伏的配电网中谐波传输和放大特性非常复杂;配电网各母线节点的电压波动和闪变值的大小与该母线节点的短路容量和功率波动密切相关。
針對分佈式光伏髮電的諧波源特性和功率波動性,對分佈式光伏接入對配電網諧波、電壓波動和閃變的影響進行瞭分析,併分析瞭揹景電能質量問題對光伏併網點電能質量的影響。同時在DIgSILENT/PowerFactory倣真平檯上搭建瞭國際大電網會議(CIGRE)認為適閤進行分佈式髮電接入配電網特性研究的典型配電網絡結構,併根據IEC 61400-4-15標準在該平檯上搭建瞭IEC電壓閃變儀,對含多接入點分佈式光伏髮電的配電網的諧波傳輸和放大特性、電壓波動和閃變的影響和評估進行瞭倣真分析。倣真結果錶明,含多接入點分佈式光伏的配電網中諧波傳輸和放大特性非常複雜;配電網各母線節點的電壓波動和閃變值的大小與該母線節點的短路容量和功率波動密切相關。
침대분포식광복발전적해파원특성화공솔파동성,대분포식광복접입대배전망해파、전압파동화섬변적영향진행료분석,병분석료배경전능질량문제대광복병망점전능질량적영향。동시재DIgSILENT/PowerFactory방진평태상탑건료국제대전망회의(CIGRE)인위괄합진행분포식발전접입배전망특성연구적전형배전망락결구,병근거IEC 61400-4-15표준재해평태상탑건료IEC전압섬변의,대함다접입점분포식광복발전적배전망적해파전수화방대특성、전압파동화섬변적영향화평고진행료방진분석。방진결과표명,함다접입점분포식광복적배전망중해파전수화방대특성비상복잡;배전망각모선절점적전압파동화섬변치적대소여해모선절점적단로용량화공솔파동밀절상관。
For harmonic source characteristics and power volatility of distributed PV, the effects of PV connecting to grid on harmonics, voltage fluctuation and flicker of distribution network are analyzed. And the impact of background power quality of distribution network on the power quality of PV connecting points is also analyzed. Meanwhile, a typical distribution network is built on DIgSILENT/PowerFactory simulation platform, which is considered to be suitable for study of PV grid-connecting characteristics by CIGRE. According to IEC 61400-4-15 standard, the IEC voltage flicker meter is also built on the platform. And then the harmonic transmission and amplification characteristics, the impact and assessment of voltage fluctuation and flicker are simulated. The simulation results show that harmonic transmission and amplification characteristics are complex in distribution network with multiple distributed PV. Additionally, the value of voltage fluctuation and flicker at each bus node is closely related to the short-circuit capacity of the bus node and power fluctuation of distributed PV.