孤網(wǎng)電力負(fù)荷平衡技術(shù)及應(yīng)用
趙中原,李曉明, 李成博,王新寶
(南京南瑞繼保電氣有限公司, 江蘇 南京 211102)
摘 要:企業(yè)自備電廠在外網(wǎng)聯(lián)接或者孤網(wǎng)運(yùn)行時(shí),存在電壓穩(wěn)定、頻率平衡問(wèn)題。提出基于晶閘管的快速、靈活控制的電子負(fù)荷技術(shù),通過(guò)三層策略控制來(lái)解決孤網(wǎng)平衡問(wèn)題。該方案以電子動(dòng)態(tài)負(fù)荷調(diào)節(jié)為平衡主要手段,同時(shí)配置孤網(wǎng)穩(wěn)定裝置,協(xié)調(diào)發(fā)電機(jī)組和負(fù)荷數(shù)量,另外還配置了頻率緊急控制作為最后防線。應(yīng)用效果表明,電子負(fù)荷快速平滑跟蹤沖擊性負(fù)荷動(dòng)態(tài)變化,可以使孤網(wǎng)高可靠性運(yùn)行、頻率穩(wěn)定。
關(guān)鍵詞:孤網(wǎng);電子負(fù)荷;電網(wǎng)穩(wěn)定
中圖分類號(hào):TM762 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):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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