| 引用本文: | 刘津濂,徐政,杨健,张哲任,宋鹏程.关于多特征自变量调节的含UPFC电力系统的潮流变化率特性[J].电力自动化设备,2021,41(1): |
| LIU Jinlian,XU Zheng,YANG Jian,ZHANG Zheren,SONG Pengcheng.Regulation principle of power flow gradient to multiple characteristic independent variables in UPFC embedded power system[J].Electric Power Automation Equipment,2021,41(1): |
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| 摘要: |
| 含统一潮流控制器(UPFC)的电力系统潮流变化率或调节效率主要由UPFC输出的串联侧嵌入电压(OSIV)的幅值和相角以及系统相角差所决定。选择这3个变量作为系统潮流调节的特征自变量(CIV)，以含UPFC双端电力系统的实际电路为背景，推导了系统不同关键节点处关于每个CIV的有功与无功潮流变化率数学模型。以系统潮流调节自由度和调节效率为依据，对系统潮流变化率的调节特性进行了理论分析。设置了多种典型系统运行工况，基于OSIV幅值和相角的2种递增变化组合方式设计了2种潮流变化率调节模式，并设计了关于系统相角差的多种典型调节场景。最后，对系统每个关键节点处的关于每个CIV的潮流变化率特性进行了案例测试与分析，所得结论有利于综合协调潮流调节效率与系统保护及稳定性的要求，使电网既高效又稳定地运行。 |
| 关键词: 统一潮流控制器 串联侧嵌入电压 潮流变化率 特征自变量 关键节点 系统运行工况 |
| DOI：10.16081/j.epae.202012019 |
| 分类号:TM744 |
| 基金项目:国家电网公司总部科技项目(SGTYHT/15-JS-191) |
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| Regulation principle of power flow gradient to multiple characteristic independent variables in UPFC embedded power system |
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LIU Jinlian1, XU Zheng1, YANG Jian1, ZHANG Zheren1, SONG Pengcheng2
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1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.National Power Dispatching and Control Center, State Grid Corporation of China, Beijing 100032, China
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| Abstract: |
| The power flow gradient or regulation efficiency of UPFC(Unified Power Flow Controller) embedded power system are mainly dominated by the amplitude and phase angle of OSIV(Output Series Inserted Vol-tage) of UPFC and the phase difference of system. The above three variables are chosen as CIVs(Characteristic Independent Variables) for power flow regulation, and with the actual circuit of UPFC embedded double-end power system as background, the mathematical models of active and reactive power flow gradient for each CIV at different critical points are deduced. Based on the regulation freedom degree and efficiency of system power flow, the regulation characteristics of power flow gradients are analyzed theoretically. A variety of typical system operation conditions are set up, and two types of power flow regulation modes are designed through two types of incremental combinations of OSIV amplitude and phase angle, and several typical regulation scenarios for the phase difference of system are also designed. Finally, the case test and analysis are performed regarding the characteristics of power flow gradients to each CIV at system critical points, and the summarized conclusions are beneficial to coordinate the power flow regulation efficiency and the require-ments of system protection and stability comprehensively, making the operation of power grid efficient and stable. |
| Key words: unified power flow controller output series inserted voltage power flow gradient characteristic independent variables critical points system operation conditions |
