考虑原动机调速特性的MVDC发电机组动态仿真模型

doi:10.19595/j.cnki.1000-6753.tces.230383

摘要
图/表
参考文献
相关文章 (4)

全文: PDF (1106 KB)
输出: BibTeX | EndNote (RIS)

摘要

鉴于原动机调速特性对MVDC发电机组运行影响的重要性,本文基于十二相同步发电机及其三相交流励磁机数学模型提出MVDC发电机组动态建模方法,以解决多相整流发电机及其励磁系统难以考虑原动机动态调速特性的难题。以某型燃气轮机整流发电机组动态仿真模型为基础,建立了频率不同的十二相同步发电机与三相交流励磁机组合模型,阐述原动机调速与发电机励磁调压相互耦合的计算流程。实测与仿真结果表明,该型燃气轮机发电机组在突加20%负载工况转速跌落较大,且转速恢复过程需约20s,但MVDC发电机组通过调节励磁系统可在1s内使直流母线电压恢复稳定,从而为负载提供稳定直流功率输出。在校准仿真模型基础上,通过系统分析突加不同比例负载时的转速、燃油流量、励磁电流、输出电压等性能参数变化规律,获取了燃发机组允许突加负载上限约为30%的运行边界认知,为MVDC发电机组励磁系统设计以及如何预留充足的短时强励能力提供了理论支撑。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	易新强
	王东
	刘海涛
	赵浩然
	袁志方

关键词 ：原动机调速特性, MVDC发电机组, 十二相整流发电机, 动态仿真模型

Abstract：

Compared with the medium voltage AC(MVAC) integrated power system, the medium voltage DC(MVDC) integrated power system eliminates the influence between the rotational speed of the prime mover and the frequency of the power grid, providing an effective solution for the parallel power supply of multiple gas turbine generator sets, diesel engine generator sets, and steam turbine generator sets with different speed regulation characteristics and magnitude differences in capacity, which is conducive to the flexible configuration of the marine power system, It represents the future development direction of ship integrated power systems at home and abroad. In MVDC integrated power systems, in order to improve fuel operation economy and power supply reliability, multi machine parallel power supply is commonly used. If a single unit trips, it will trigger a dynamic process of sudden load application to the units on the grid. At this time, maintain the stability of the grid voltage is one of the issues that need to be focused on at the beginning of the design of the MVDC integrated power system, which is closely related to the speed regulation performance of the prime mover and the voltage regulation performance of the generator. Therefore, it is necessary to establish a dynamic simulation model of an MVDC generator unit that takes into account the speed regulation characteristics of the prime mover.
Based on traditional modeling methods for synchronous generators, this paper takes a time base value of 1 and unifies the electrical angular velocity input interface of the mathematical models of twelve-phase synchronous generators and their three-phase exciters, establishes a variable coefficient matrix high order state space simulation model that takes into account the speed variation, as shown in Figure 1. And then proposes a dynamic modeling method for MVDC generator sets that considers the speed regulation characteristics of prime movers. Taking a certain type of gas turbine generator unit as an example, a dynamic simulation model is established in MATLAB/Simulink software, as shown in Figure 2. By introducing the output electromagnetic torque of the MVDC generator and its excitation system into the gas turbine and its speed governing system, and then connecting the output rotational speed of the gas turbine and its speed governing system to the MVDC generator and its excitation system, strong coupling numerical simulation calculation of the prime mover speed regulation and the generator excitation voltage regulation can be achieved.
The dynamic performance of a real system that may occur under the no-load sudden load condition of grid units is simulated, and compared with the experimental results of actual MVDC gas turbine power generation units under sudden load condition of 20%. The comparison of rotational speed output waveforms is shown in Figure 1, and the comparison of DC voltage output waveforms is shown in Figure 2. It can be seen that the simulation and experimental results are basically consistent, verifying the effectiveness and accuracy of the model. For the dynamic performance indicators such as transient speed regulation rate, transient voltage regulation rate, rotational speed, voltage recovery time, etc. that are key concerns of the MVDC integrated power system, the maximum relative error between the simulation results and the experimental results is 2.91%, which more effectively verifies the accuracy of the dynamic performance simulation analysis of the MVDC generator set model.

This paper proposes a modeling method for MVDC generator sets based on the consideration of the speed regulation characteristics of prime movers, and establishes corresponding dynamic simulation models for twelve-phase rectifier generators and three-phase excitation motors. The simulation results are in good agreement with experimental results based on actual operating parameters, verifying the correctness of the proposed method and the accuracy of the model used. Based on the dynamic performance simulation and experimental data of a scientific research prototype, it is shown that MVDC reduces the requirements for the transient speed regulation performance of the prime mover, and further demonstrates that MVDC has more advantages compared to MVAC integrated power systems. The simulation models and test conditions can provide support for promoting the engineering process of MVDC integrated power systems.

Key words： Speed characteristics of prime mover MVDC generator set twelve-phase rectifier generator dynamic simulation model

PACS:

TM314

基金资助:

国家自然科学基金项目（52107136、52207047）

通讯作者: 王东男,1978年生,教授,博士生导师,研究方向为电力推进、独立电源系统。E-mail： wangdongl@vip.sina.com

作者简介: 易新强男,1986年生,副研究员,研究方向为为多相整流发电机励磁控制、电力推进技术;E-mail： yixinqiang86@163.com

引用本文:

易新强, 王东, 刘海涛, 赵浩然, 袁志方. 考虑原动机调速特性的MVDC发电机组动态仿真模型[J]. 电工技术学报, 0, (): 239616-239616. Yi Xinqiang, Wang Dong, Liu Haitao, Zhao Haoran, Yuan Zhifang. Dynamic Simulation Model of MVDC Generating Set Considering the Speed Regulation Characteristics of Prime Movers. Transactions of China Electrotechnical Society, 0, (): 239616-239616.

链接本文:

https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.230383 https://dgjsxb.ces-transaction.com/CN/Y0/V/I/239616

[1] 马伟明. 舰船综合电力系统中的机电能量转换技术[J]. 电气工程学报, 2015, 10(04):3-10.
Ma Weiming.Electromechanical power conversion technologies in vessel integrated power system[J]. Journal of Electrical Engineering, 2015, 10(4):3-10.
[2] 付立军, 刘鲁锋, 王刚, 马凡, 叶志浩, 纪锋, 刘路辉. 我国舰船中压直流综合电力系统研究进展[J].中国舰船研究, 2016, 11(01):72-79.
Fu Lijun, Liu Lufeng, Wang Gang, et al.The research progress of the medium voltage DC integrated power system in China[J]. Chinese Journal of Ship Research, 2016, 10(4):3-10.
[3] 李浩然, 崔超辉, 王生东, 张之梁, 胡存刚. 基于二阶拟合模型的SiC双向LLC数字同步整流控制[J]. 电工技术学报, 2022, 37(24):6191-6203.
Li Haoran, Cui Chaohui, Wang Shengdong, et al.Two-Order Fitting Model-Based Digital Synchronous Rectifier Control for SiC Bidirectional LLC Converter[J]. Transactions of China Electrotechnical Society, 2022, 37(24):6191-6203.
[4] 宋钊, 刘明. 模块化多端口无线电能DC-DC变换器建模及其多向功率流解耦控制策略[J]. 电工技术学报, 2022, 37(24):6262-6271.
Song Zhao, Liu ming. Modular Multiport Wireless DC-DC Converter with Multidirectional Power Flow and Its Decoupling Control Strategy[J]. Transactions of China Electrotechnical Society, 2022, 37(24):6262-6271.
[5] 原露恬, 王琛琛, 薛尧, 杨晓峰, 郑琼林. 适用于中压领域的V形钳位多电平变换器[J]. 电工技术学报, 2021, 36(20):4318-4328+4338.
Yuan Lutian, Wang Chenchen, Xue Yao, et al. V-Clamp Multilevel Converters Suitable for Medium-Voltage Fields[J]. Transactions of China Electrotechnical Society, 2021, 36(20):4318-4328+4338.
[6] 林霖, 裴忠晨, 蔡国伟, 刘闯, 裴勇. 混合式隔离型模块化多电平变换器[J]. 电工技术学报, 2021, 36(16):3319-3330.
Lin Lin, Pei Zhongchen, Cai Guowei1, et al. Hybrid Isolated Modular Multilevel Converter[J]. Transactions of China Electrotechnical Society, 2021, 36(16):3319-3330.
[7] 马伟明. 关于电工学科前沿技术发展的若干思考[J].电工技术学报, 2021, 36(22):4627-4636.
Ma Weiming.Thoughts on the Development of Frontier Technology in Electrical Engineering[J]. Transactions of China Electrotechnical Society, 2021, 36(22):4627-4636.
[8] 马凡, 付立军, 郭云珺, 易新强, 纪锋. 十二相同步发电机整流系统直流极间短路电流的解析计算方法[J]. 中国电机工程学报, 2021, 41(20):7117-7126.
Ma Fan, Fu Lijun, Guo Yunjun, et al.Analytic Calculation of Pole-to-Pole Faults in Twelve-phase Synchronous Generator-rectifier systems[J]. Proceedings of the CSEE, 2021, 41(20):7117-7126.
[9] 黄河, 马凡, 付立军, 张向明, 荆从凯. 十二相整流发电机并联供电系统直流中点环流特性及其抑制方法[J]. 电工技术学报, 2022, 37(07):1760-1767.
Huang He, Ma Fan, FU Lijun, et al.DC Neutral Point Circulating Current Characteristics and Suppression Method of Twelve-Phase Rectifier Generator Parallel Power Supply System[J]. Transactions of China Electrotechnical Society, 2021, 41(20):7117-7126.
[10] 谢卫, 朱军. 十二相四Y移15°绕组同步电动机的数学模型及动态仿真[J]. 电工技术学报, 2004, 01(01):2-6.
Xie Wei, Zhu Jun.Modeling and Simulation of 12-Phase Synchronous Motor with Four Y-Connected 3-Phase Symmetrical Windings Displaced in Turn by 15°[J]. Transactions of China Electrotechnical Society, 2004, (01):2-6.
[11] 魏克银, 刘德志, 欧阳斌, 翟小飞, 晏明, 卢露. 一种带线性动态负载的十二相飞轮储能发电机系统[J]. 电工技术学报, 2010, 25(01):37-42.
Wei Keyin, Liu Dezhi, Ouyang Bin, et al.A 12-Phase Flywheel Energy Storage Generator System With Linearly Dynamic Load[J]. Transactions of China Electrotechnical Society, 2010, 25(01):37-42.
[12] 刘金利, 马伟明, 翟小飞, 晏明. 双九相储能电机带整流负载系统降阶等效平均模型研究[J]. 电工技术学报, 2018, 33(17):4052-4059.
Liu Jinli, Ma Weiming, Zhai Xiaofei, et al.Study on Equivalent Reduced Average Model of Dual Nine-Phase Energy Storage Electrical Machine with Rectifier Load[J]. Transactions of China Electrotechnical Society, 2018, 33(17):4052-4059.
[13] 晏明, 马伟明, 欧阳斌, 马名中, 卢露. 双九相储能电机系统性能研究[J]. 中国电机工程学报, 2015, 35(15):3770-3775.
Yan Ming, Ma Weiming, Ouyang Bin, et al.Study on the Characteristics of Dual Nine-Phase Energy Storage Electrical Machine[J]. Proceedings of the CSEE, 2015, 35(15):3770-3775.
[14] 欧阳斌, 马伟明, 王东, 魏克垠, 翟小飞. 大容量双六相储能电机系统建模与仿真[J]. 电机与控制学报, 2014, 18(01):92-97.
Ouyang Bin, Ma Weiming, Wang Dong, et al.Modeling and simulation of energy storage system with dual six-phase electrical machine of great capacity[J]. Electric Machines and Control, 2014, 18(01):92-97.
[15] 马伟明, 王东. 多相整流发电机及其系统的分析[M].浙江:浙江大学出版社. 2020.
[16] 孙鹏, 张善科, 马正军, 李舸溯. 某型燃气轮机发电机组大负荷突卸时动态特性仿真与试验研究[J]. 热能动力工程, 2019, 34(7):66-70.
Sun Peng, Zhang Shanke,Ma Zhengjun, et al.Simulation and Experimental Study on Dynamic Characteristics of a Gas Turbine Generator Unit during Suddenly Unloading at Heavy Load[J]. Journal of Engineering for Thermal Energy and Power, 2019, 34(7):66-70.
[17] Yi Xinqiang,Wang Dong, Guo Yunjun, et al.Research on self-excited initiation of a Medium-voltage DC (MVDC) multiphase synchronous generator-rectifier system, 2014 17th International Conference on Electrical Machines and Systems (ICEMS), 2014: 01(01):368-372.
[18] 国防科学技术工业委员会. 舰船燃气轮机通用规范:GJB 730A-1997[S].1997.