Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

Article retrieval

文章檢索

首頁(yè) >> 文章檢索 >> 文章瀏覽排名

并網(wǎng)光伏電站LVRT特性對(duì)升壓變壓器繼電保護(hù)的影響

來(lái)源:電工電氣發(fā)布時(shí)間:2019-08-16 13:16 瀏覽次數(shù):678
并網(wǎng)光伏電站LVRT特性對(duì)升壓變壓器繼電保護(hù)的影響
 
王冰冰
(南京理工大學(xué) 自動(dòng)化學(xué)院,江蘇 南京 210094)
 
    摘 要:并網(wǎng)光伏電站具備低電壓穿越能力,對(duì)光伏電站的故障電流特性起決定性作用,給電網(wǎng)繼電保護(hù)造成影響?;赑SCAD/EMTDC平臺(tái)搭建光伏電站并網(wǎng)模型,研究光伏系統(tǒng)的故障電流特性;針對(duì)光伏電站升壓變壓器的繼電保護(hù)配置方案,分析光伏電站對(duì)其動(dòng)作特性的影響。仿真結(jié)果表明,在故障初期,二次諧波制動(dòng)會(huì)短暫閉鎖差動(dòng)保護(hù),同時(shí)光伏電站的無(wú)功電流會(huì)降低保護(hù)靈敏度;光伏電站容量增大,保護(hù)靈敏度也有所增大。
    關(guān)鍵詞:光伏電站;低電壓穿越;故障特性;二次諧波制動(dòng);靈敏度
    中圖分類號(hào):TM401;TM615     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):1007-3175(2019)08-0011-06
 
Influence of Grid-Connected Photovoltaic Station with Low Voltage Ride-Through Capability on Step-Up Transformer Relay Protection
 
WANG Bing-bing
(School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China)
 
    Abstract: The low voltage ride-through capability plays a decisive role in the characteristic of failure current in grid-connected photovoltaic power station and has impacts on the grid relay protection. A model of photovoltaic power station connected with the grid was built on PSCAD/EMTDC, and the failure current characteristics were studied. Aiming at the configuration scheme of relay protection of the step-up transformer, this paper analyzed the influence of photovoltaic power station on its performance characteristics. The simulation results show that the secondary harmonics braking will temporarily close the differential protection at the beginning of the fault. The reactive current in a photovoltaic power station will reduce the sensitivity of the protection. The capacity of photovoltaic power station increases and the sensitivity of the protection increases accordingly.
    Key words: photovoaltaic power station; low voltage ride through; fault characteristics; secondary harmonics restraint; sensitivity
 
參考文獻(xiàn)
[1] 丁明,王偉勝,王秀麗,等. 大規(guī)模光伏發(fā)電對(duì)電力系統(tǒng)影響綜述[J]. 中國(guó)電機(jī)工程學(xué)報(bào),2014,34(1):1-14.
[2] 衛(wèi)波. 分布式電源接入對(duì)配電網(wǎng)繼電保護(hù)的影響及對(duì)策的研究[D]. 北京:華北電力大學(xué),2013.
[3] 蔡云峰,徐洋,潘琪. 基于自定義模型的變壓器縱差動(dòng)保護(hù)PSCAD仿真[J]. 電力系統(tǒng)保護(hù)與控制,2015,43(3):118-122.
[4] 張海玉,劉闖,晁勤,等. 具有LVRT能力的并網(wǎng)光伏系統(tǒng)繼電保護(hù)問(wèn)題研究[J]. 電力系統(tǒng)保護(hù)與控制,2015,43(3):53-60.
[5] 贠劍, 常喜強(qiáng), 魏偉, 等. 大規(guī)模光伏發(fā)電對(duì)新疆電網(wǎng)繼電保護(hù)影響的研究[J]. 電氣技術(shù),2015(10):27-33.
[6] 閆凱,張保會(huì),郝治國(guó). 光伏電站接入電網(wǎng)繼電保護(hù)動(dòng)作特性分析及改進(jìn)措施[C]//2013第十四屆全國(guó)保護(hù)和控制學(xué)術(shù)研討會(huì),2013:1-6.
[7] 瞿繼平,吳興全,閆凱,等. 光伏電站弱電源特性對(duì)送出線路繼電保護(hù)的影響[J]. 電力自動(dòng)化設(shè)備,2015,35(5):146-151.
[8] 張保會(huì),王進(jìn),郝治國(guó),等. 風(fēng)電接入對(duì)繼電保護(hù)的影響( 三)——風(fēng)電場(chǎng)送出變壓器保護(hù)性能分析[J]. 電力自動(dòng)化設(shè)備,2013,33(3):1-8.
[9] 張保會(huì),李光輝,王進(jìn),等. 風(fēng)電接入電力系統(tǒng)故障電流的影響因素分析及對(duì)繼電保護(hù)的影響[J]. 電力自動(dòng)化設(shè)備,2012,32(2):1-8.
[10] 鐘顯,樊艷芳,王一波. 雙饋集群匯集站主變及送出線路繼電保護(hù)研究[J]. 電力系統(tǒng)保護(hù)與控制,2016,44(5):47-54.
[11] 國(guó)家電網(wǎng)公司. 光伏電站接入電網(wǎng)技術(shù)規(guī)定:Q/GDW 617—2011[S]. 北京:中國(guó)電力出版社,2011:5-6.
[12] 陳波,朱凌志,朱曉東. 并網(wǎng)光伏電站低電壓穿越仿真與分析[J]. 江蘇電機(jī)工程,2012,31(5):13-17.
[13] 楊杉,同向前. 含低電壓穿越型分布式電源配電網(wǎng)的短路電流計(jì)算方法[J]. 電力系統(tǒng)自動(dòng)化,2016,40(11):93-99.
[14] 張遠(yuǎn). 電力變壓器繼電保護(hù)動(dòng)作行為仿真分析系統(tǒng)[D]. 長(zhǎng)沙:湖南大學(xué),2012.
[15] 王秀蓮,胡廣,畢大強(qiáng). 光伏低電壓穿越期間無(wú)功補(bǔ)償對(duì)差動(dòng)保護(hù)靈敏度的影響分析[J]. 電力系統(tǒng)保護(hù)與控制,2016,44(4):51-56.
[16] 韓賢歲,劉其輝. 對(duì)稱和不對(duì)稱故障下的并網(wǎng)光伏逆變器低電壓穿越研究[J]. 電測(cè)與儀表,2015,52(9):113-118.
[17] 徐崇新,焦彥軍,張旭. 含光伏電站的輸電網(wǎng)不對(duì)稱故障分析方法[J]. 電測(cè)與儀表,2016,53(4):20-24.