电网电压跌落下基于二分迭代和NITA法的同步调相机全域瞬态流热分析  

Global Transient Flow and Heat Analysis of Synchronous Condenser Based on Dichotomy Iteration and NITA Method Under Voltage Drop in Power Grid

作　　者：王立坤[1] 宋旭升 寇宝泉[2] 孙玉田[3] 沈峰裕 李靖琰 WANG Likun;SONG Xusheng;KOU Baoquan;SUN Yutian;SHEN Fengyu;LI Jingyan(National and Local Joint Engineering Research Center of Large Electric Machines and Heat Transfer technology(Harbin University of Science and Technology),Harbin 150080,Heilongjiang Province,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China;Harbin Electric Machinery Co.,Ltd.,Harbin 150040,Heilongjiang Province,China)

机构地区：[1]大型电机电气与传热技术国家地方联合工程研究中心(哈尔滨理工大学),黑龙江省哈尔滨市150080 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市150001 [3]哈尔滨电机厂有限责任公司,黑龙江省哈尔滨市150040

出　　处：《中国电机工程学报》2024年第20期8292-8303,I0031,共13页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学基金项目(51907042);黑龙江省优秀青年科学基金(YQ2021E038)。

摘　　要：同步调相机安装在特高压输电系统换流站内用于稳定输电系统的电压,输电系统可能发生电压跌落故障决定其需要具备工作在极限运行状态的能力。温升是制约调相机极限调节能力的重要因素之一,因此,对同步调相机极限运行时的瞬态流热分析非常必要。该文建立调相机与输电系统耦合的暂态分析模型,研究电网电压跌落时调相机的瞬态响应特性。为综合评价电网电压跌落故障对调相机热表征的影响,建立300 Mvar同步调相机全域内流固耦合瞬态分析模型;提出一种二分迭代的流固耦合模型边界确定方法,通过数以亿计的多面体网格离散(共1.4亿网格单元),同时,基于非迭代时间推进法对全域复杂传热模型进行求解,研究调相机多风腔内流体和温度相互影响机理;探讨极限运行状态下温度约束对调相机安全运行的影响。为对该文所提研究方法进行验证,开展调相机总装温升实验,证明其可行性与准确性。The synchronous condenser is installed in the converter station of the ultra-high voltage transmission system to stabilize the voltage of the transmission system.The possibility of voltage drop faults in the transmission system necessitates its capability to operate effectively under extreme conditions.Temperature rise is one of the important factors that restrict the ultimate adjustment ability of a condenser,so it is necessary to conduct transient flow and heat analysis during the extreme operation of the synchronous condenser.This article establishes a transient analysis model for the coupling between the condenser and the transmission system,and studies the transient response characteristics of the condenser when the power grid voltage drops.In order to comprehensively evaluate the impact of grid voltage drop fault on the thermal characterization of the condenser,a transient analysis model of fluid-solid coupling in the entire domain of a 300 Mvar synchronous condenser is established.The boundary determination method of fluid-solid coupling model based on dichotomy iteration method is proposed,by discretizing hundreds of millions of polyhedral grids(totaling 140 million grid units)and solving the global complex heat transfer model based on the non-iterative time-advancement(NITA)method.The mechanism of the interaction between fluid and temperature in the multi chamber of the condenser is studied.The impact of temperature constraints on the safe operation of the condenser under the extreme operating condition is explored.To validate the research method proposed in this article,a general assembly type test of 300 Mvar synchronous condenser is conducted,proving its feasibility and accuracy.

关 键 词：同步调相机 电网电压跌落 非迭代时间推进法 瞬态流固特性 

分 类 号：TM342[电气工程—电机]