| 引用本文: | 孟建辉,赵彭辉,王毅,张赟.基于TOPSIS算法的多VSG单元协同控制策略[J].电力自动化设备,2020,40(9): |
| MENG Jianhui,ZHAO Penghui,WANG Yi,ZHANG Yun.Collaborative control strategy of multiple VSG units based on TOPSIS algorithm[J].Electric Power Automation Equipment,2020,40(9): |
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| 摘要: |
| 基于电力电子变流器的非同步机电源采用虚拟同步发电机(VSG)控制技术可以实现其对电网的友好支撑，但各VSG单元共同运行时存在虚拟惯量分配及协同支撑电网问题。为更好地实现多VSG单元在提供惯性支撑时的协同配合，提出一种基于逼近于理想值排序方法(TOPSIS)的多VSG单元协同控制策略。首先，通过系统中各储能端的剩余容量和系统频率变化率，对含多VSG单元的系统总惯量大小进行调整；其次，综合考虑各VSG单元的储能荷电状态、换流器容量、储能充放电功率限制等指标差异，结合TOPSIS算法对各VSG单元的虚拟惯量进行合理分配和实时调整，以维持各VSG单元的安全运行，同时减小系统频率波动；进一步建立了含多VSG单元的六端系统小信号模型，对协同控制中的主要参数进行了稳定性分析；最后，通过搭建硬件在环实验平台对所提协同控制策略的有效性进行了验证，结果表明所提方法可以较好地实现多VSG单元的协同运行。 |
| 关键词: 多VSG单元 协同运行 TOPSIS算法 小信号建模 稳定性分析 |
| DOI：10.16081/j.epae.202009017 |
| 分类号:TM31;TM712 |
| 基金项目:国家自然科学基金资助项目(51807064)；河北省自然科学基金资助项目(E2018502152) |
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| Collaborative control strategy of multiple VSG units based on TOPSIS algorithm |
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MENG Jianhui, ZHAO Penghui, WANG Yi, ZHANG Yun
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Baoding 071003, China
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| Abstract: |
| Power electronic converter based non-synchronous machine source uses VSG(Virtual Synchronous Generator) control technology to achieve its friendly support to power grid. However, the problems of virtual inertia distribution and collaborative support to power grid exist when multiple VSG units operate together. In order to realize the collaborative coordination of multiple VSG units when providing inertial support, a collaborative control strategy of multiple VSG units based on TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution) algorithm is proposed. Firstly, the total inertia of the system with multiple VSG units is adjusted through the remaining energy of each energy storage system and the system frequency change rate. Secondly, comprehensively considering the performance differences of each VSG unit such as the state of charge, converter capacity and energy storage charge and discharge power limit, the virtual inertia of each VSG unit is reasonably allocated and adjusted in real time by combining with TOPSIS algorithm, so as to maintain the stable operation of each VSG unit and reduce the fluctuation of system frequency. Furthermore, a small-signal model of six-terminal AC system with multiple VSG units is built, and the stability of main parameters in collaborative control is analyzed. Finally, the effectiveness of the proposed collaborative control strategy is verified in the hardware-in-the-loop experimental system, which shows that the proposed strategy can achieve the collaborative operation of multiple VSG units. |
| Key words: multiple VSG units collaborative operation TOPSIS algorithm small-signal modeling stability analysis |
