【摘要】：針對(duì)采用VSC-HVDC向弱電網(wǎng)供電時(shí),受端弱電網(wǎng)慣量不足而出現(xiàn)擾動(dòng)下暫態(tài)頻率偏移較大的問(wèn)題,提出了一種模擬慣量控制策略,以增大受端弱電網(wǎng)的慣量,從而提高系統(tǒng)的頻率質(zhì)量。為此,在對(duì)比換流站直流側(cè)電容和同步發(fā)電機(jī)轉(zhuǎn)子儲(chǔ)能特性的基礎(chǔ)上,建立了直流電壓與系統(tǒng)頻率的映射關(guān)系,從而得出了換流站所模擬慣量的具體計(jì)算等式。利用PSCAD/EMTDC就三種擾動(dòng)下對(duì)VSC-HVDC逆變側(cè)換流站分別采用傳統(tǒng)控制和所提模擬慣量控制時(shí)進(jìn)行了仿真比較。仿真結(jié)果表明,所提模擬慣量控制策略能夠減小擾動(dòng)下受端弱電網(wǎng)暫態(tài)頻率偏移,提高受端弱電網(wǎng)的頻率質(zhì)量。
[Abstract]:In order to solve the problem of large transient frequency offset caused by weak grid inertia at receiving end when VSC-HVDC is used to supply power to weak power network, an analog inertia control strategy is proposed to increase the inertia of receiving weak grid. Thus, the frequency quality of the system is improved. On the basis of comparing the DC side capacitance of converter station with the energy storage characteristics of synchronous generator rotor, the mapping relationship between DC voltage and system frequency is established, and the concrete calculation equation of the simulated inertia of converter station is obtained. In this paper, PSCAD/EMTDC is used to simulate and compare the conventional control and the proposed simulated inertia control for the VSC-HVDC inverter side converter station under three disturbances. The simulation results show that the proposed simulation inertia control strategy can reduce the transient frequency offset of the receiving weak current network under disturbance and improve the frequency quality of the receiver weak current network.
【作者單位】： 中國(guó)南方電網(wǎng)超高壓輸電公司柳州局;
【分類號(hào)】：TM721.1

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本文編號(hào)：2275160