【摘要】：受端分層特高壓直流受端高低壓閥組接入不同電壓等級的交流電網(wǎng),為了提高設(shè)備可用率和減少在交流系統(tǒng)故障引起的功率損失,提出了換相失敗預(yù)測控制的聯(lián)動機(jī)制減小換相失敗發(fā)生的概率�；诮涣飨到y(tǒng)基波負(fù)序電壓幅值的閥組諧波保護(hù),在某個交流系統(tǒng)發(fā)生不對稱故障時能退出相應(yīng)閥組,保證另一閥組能繼續(xù)運(yùn)行。三相對稱故障時利用閥組欠壓保護(hù)作為后備保護(hù)。并在此基礎(chǔ)上提出了分級多層次的保護(hù)動作策略,達(dá)到提高設(shè)備的可用率和減少功率損失的目的。理論分析和實時數(shù)字仿真(real time digital simulator,RTDS)試驗驗證了文中所提策略的正確性和可行性。
[Abstract]:The receiving terminal layered UHV DC receiving high and low voltage valve group is connected to the AC power grid with different voltage levels in order to improve the availability of the equipment and reduce the power loss caused by the AC system failure. The linkage mechanism of commutation failure predictive control is proposed to reduce the probability of commutation failure. The harmonic protection of valve group based on the amplitude of fundamental negative sequence voltage of AC system can exit the corresponding valve group when an asymmetric fault occurs in one AC system to ensure that the other valve group can continue to run. The undervoltage protection of valve group is used as backup protection in three-phase symmetrical fault. On this basis, a hierarchical and multi-level protection action strategy is proposed to improve the availability of the equipment and reduce the power loss. Theoretical analysis and real-time digital simulation (real time digital simulator,RTDS) experiments verify the correctness and feasibility of the proposed strategy.
【作者單位】： 南京南瑞繼保電氣有限公司;國家電網(wǎng)調(diào)度控制中心;
【基金】：國家重點研發(fā)計劃項目(2016YFB0900602) 國家電網(wǎng)公司科技項目(SGTYHT/15-JS-191)~~
【分類號】：TM721.1

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本文編號：2480867