基于高階系統(tǒng)模型的VSC-MTDC下垂控制策略研究
發(fā)布時間：2018-11-17 15:02
【摘要】：多端柔性直流輸電(VSC-MTDC)基于柔性直流技術(shù)及多站協(xié)調(diào)控制策略。首先,設(shè)計了適于VSC-MTDC的P-U_(dc)/U_(ac)-Q下垂策略及控制系統(tǒng)架構(gòu)。其次,提出基于LCL高階一次系統(tǒng)模型的電流內(nèi)環(huán)、直流電壓外環(huán)及下垂環(huán)控制器架構(gòu),并形成了優(yōu)化控制參數(shù)的設(shè)計方法。最后,在PSCAD/EMTDC中搭建了10 kV 4端VSC-MTDC的仿真模型并進行控制參數(shù)優(yōu)化,基于啟動控制、穩(wěn)態(tài)控制及臨界階躍響應(yīng)3種暫態(tài)工況進行仿真分析。仿真結(jié)果表明,所提策略可實現(xiàn)各站直流母線電壓的獨立控制基礎(chǔ)上的下垂式有功潮流控制,提升了VSC-MTDC系統(tǒng)的安全穩(wěn)定性,且多種暫態(tài)工況下響應(yīng)特性良好。
[Abstract]:Multi-terminal flexible DC transmission (VSC-MTDC) is based on flexible DC technology and multi-station coordinated control strategy. Firstly, P-U _ (dc) / U _ (ac)-Q droop strategy and control system architecture for VSC-MTDC are designed. Secondly, the controller architecture of current inner loop, DC voltage outer loop and droop loop based on LCL high order primary system model is proposed, and the design method of optimizing control parameters is formed. Finally, the simulation model of 10 kV 4-terminal VSC-MTDC is built in PSCAD/EMTDC and the control parameters are optimized. The simulation analysis is carried out under three transient conditions: start-up control, steady-state control and critical step response. The simulation results show that the proposed strategy can realize droop active power flow control on the basis of independent control of DC bus voltage at various stations, and improve the safety and stability of VSC-MTDC system, and the response characteristics are good under various transient conditions.
【作者單位】： 國網(wǎng)江蘇省電力公司經(jīng)濟技術(shù)研究院;南京南瑞集團公司(國網(wǎng)電力科學(xué)研究院);
【基金】：國家重大科技專項(2016YFB0901805) 國家電網(wǎng)公司科技項目(524606150161) 南京南瑞集團公司科技項目(524606150143)~~
【分類號】：TM721.1
本文編號：2338203
[Abstract]:Multi-terminal flexible DC transmission (VSC-MTDC) is based on flexible DC technology and multi-station coordinated control strategy. Firstly, P-U _ (dc) / U _ (ac)-Q droop strategy and control system architecture for VSC-MTDC are designed. Secondly, the controller architecture of current inner loop, DC voltage outer loop and droop loop based on LCL high order primary system model is proposed, and the design method of optimizing control parameters is formed. Finally, the simulation model of 10 kV 4-terminal VSC-MTDC is built in PSCAD/EMTDC and the control parameters are optimized. The simulation analysis is carried out under three transient conditions: start-up control, steady-state control and critical step response. The simulation results show that the proposed strategy can realize droop active power flow control on the basis of independent control of DC bus voltage at various stations, and improve the safety and stability of VSC-MTDC system, and the response characteristics are good under various transient conditions.
【作者單位】： 國網(wǎng)江蘇省電力公司經(jīng)濟技術(shù)研究院;南京南瑞集團公司(國網(wǎng)電力科學(xué)研究院);
【基金】：國家重大科技專項(2016YFB0901805) 國家電網(wǎng)公司科技項目(524606150161) 南京南瑞集團公司科技項目(524606150143)~~
【分類號】：TM721.1
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