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浙江大学学报(工学版)
浙江大学学报(工学版)  2023, Vol. 57 Issue (11): 2305-2313    DOI: 10.3785/j.issn.1008-973X.2023.11.018
电气工程     
计及不同控制方式的混合直流多馈入系统电网强度评估
江俊贤1(),陈启超2,王菲2,王奕鑫1,李辰3,王冠中4,*()
1. 浙江大学 电气工程学院，浙江 杭州 310027
2. 国网经济技术研究院有限公司，北京 102209
3. 国网江苏省电力有限公司经济技术研究院，江苏 南京 210008
4. 山东大学 电网智能化调度与控制教育部重点实验室，山东 济南 250061
Grid strength analysis of hybrid multi-infeed HVDC system considering different control modes
Jun-xian JIANG1(),Qi-chao CHEN2,Fei WANG2,Yi-xin WANG1,Chen LI3,Guan-zhong WANG4,*()
1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
2. State Grid Economic and Technological Research Institute Co. Ltd, Beijing 102209, China
3. State Grid Jiangsu Economic Research Institute, Nanjing 210008, China
4. Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Shandong University, Jinan 250061, China
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摘要：

综合多种高压直流(HVDC)控制方式，进一步完善基于交流网络模态解耦的混合直流多馈入系统电网强度评估方法，使之适用于异构的基于电网换相换流器的高压直流输电(LCC-HVDC)和基于电压源型换流器的高压直流输电(VSC-HVDC)的混合直流多馈入系统的电压稳定分析. 推导计及多种控制方式的LCC-HVDC直流侧雅克比矩阵，定性分析LCC-HVDC控制方式对电压稳定裕度的影响规律，在此基础上提出异构LCC-HVDC多馈入系统的电网强度评估方法. 把握混合直流馈入系统电压稳定问题中的主要矛盾，将次要影响因素以模态摄动的形式进行近似计算，以保持电网强度评估方法的实用性和便捷性. 通过数值计算和时域仿真说明所提方法的有效性. 分析结果表明，LCC-HVDC的受端定熄弧角控制方式是恶化系统电压稳定性的主导控制模式，混合直流多馈入系统的电压稳定性随着直流容量减小或联络导纳增大而增强.
关键词： 网络模态解耦;  混合高压直流(HVDC)多馈入系统;  电压稳定;  控制方式;  电网强度    
Abstract:

A variety of high voltage direct current (HVDC) control methods were synthesized, in order to further improve the voltage support strength evaluation method of hybrid multi-infeed HVDC system based on network modal decoupling. The purpose is to make it suitable for the voltage stability analysis of hybrid multi-infeed HVDC systems with heterogeneous line commutated converter based HVDC (LCC-HVDC) and voltage source converter based HVDC (VSC-HVDC). The Jacobian matrix of the DC side for the LCC-HVDC system was derived, taking into account various control methods. The impact of LCC-HVDC control method on voltage stability margin was qualitatively analyzed, and based on this, an assessment method for the grid strength of a heterogeneous LCC-HVDC multi-input system was proposed. The main contradictions in voltage stability issues in mixed DC input systems were accurately grasped. The secondary influencing factors were approximated in the form of modal perturbations to maintain the practicality and convenience of the grid strength assessment method. The effectiveness of the proposed method was demonstrated through numerical calculations and time-domain simulations. Analysis results show that the constant extinction angle control mode of LCC-HVDC is the dominant control mode that deteriorates power system voltage stability. The voltage stability of the hybrid multi-infeed high voltage direct current (HVDC) system is stronger as the HVDC capacity decreases or the contact admittance increases.
Key words: network modal decouple    hybrid multi-infeed high voltage direct current (HVDC) system    voltage stability    control mode    grid strength
收稿日期: 2022-10-24 出版日期: 2023-12-11
CLC:  TU 111  
基金资助: 国家电网有限公司科技资助项目 (5100-202156020A-0-0-00)
通讯作者: 王冠中     E-mail: jx.jiang@zju.edu.cn;eewgz@sdu.edu.cn
作者简介: 江俊贤（1998—），男，硕士，从事交直流电力系统稳定性研究. orcid.org/0000-0002-6269-9967. E-mail： jx.jiang@zju.edu.cn
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引用本文:

江俊贤,陈启超,王菲,王奕鑫,李辰,王冠中. 计及不同控制方式的混合直流多馈入系统电网强度评估[J]. 浙江大学学报(工学版), 2023, 57(11): 2305-2313.

Jun-xian JIANG,Qi-chao CHEN,Fei WANG,Yi-xin WANG,Chen LI,Guan-zhong WANG. Grid strength analysis of hybrid multi-infeed HVDC system considering different control modes. Journal of ZheJiang University (Engineering Science), 2023, 57(11): 2305-2313.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2023.11.018    或    https://www.zjujournals.com/eng/CN/Y2023/V57/I11/2305

图 1  LCC-HVDC馈入系统等效电路
图 2  考虑VSC-HVDC后的系统雅克比矩阵的分析流程
图 3  混合直流多馈入系统电压稳定性评估流程
馈入控制方式 ${C_{\rm{c}}}$ $X$ $\gamma $ ${P_i}$
LCC-HVDC 1（CP-CEA） 0.536 0.536 18 1
LCC-HVDC 2（CP-CEA） 0.536 1.000 15 1
LCC-HVDC 3（CP-CEA） 0.536 0.180 25 1
表 1  LCC-HVDC三馈入系统直流侧参数
节点i 节点j 导纳标幺值 节点i 节点j 导纳标幺值
1 0 ?4.5 2 3 1.5
1 2 1.3 3 0 ?5.6
1 3 1.6 3 1 1.6
2 0 ?5.8 3 2 1.5
2 1 1.3 — — —
表 2  LCC-HVDC三馈入系统交流侧等值参数
图 4  电网强度随直流功率的变化曲线
馈入控制方式 Cc τ X γ PN QN
LCC-HVDC 1
（CP-CEA） 		0.536 1 0.15 18 1.00 —
LCC-HVDC 2
（CP-CEA） 		0.536 1 0.18 21 1.00 —
VSC-HVDC 3
（Pv/Qv） 		— — — — 0.76 0.62
表 3  混合直流三馈入系统直流侧参数
节点i 节点j 导纳标幺值 节点i 节点j 导纳标幺值
1 0 ?4.2 2 3 1.4
1 2 1.2 3 0 ?6.2
1 3 1.8 3 1 1.8
2 0 ?6 3 2 1.4
2 1 1.2 — — —
表 4  混合直流三馈入系统交流侧等值参数
图 5  MIDC系统功率变化曲线
图 6  MIDC系统电压变化曲线
图 7  混合直流馈入系统的时域仿真结果
图 8  IEEE-39系统模型
图 9  IEEE-39系统的时域仿真结果
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