CAJ | 학술논문

以云广直流2013年“5·26”孤岛调试中单极闭锁试验导致双极闭锁事件为例，分析了孤岛方式下单极闭锁后直流系统无功控制及发电机励磁系统的响应特性。指出了机组电力系统稳定器(PSS)存在的反调现象显著恶化了孤岛系统的过电压问题，直流无功控制对大扰动后频率、电压变化的适应性不足是导致双极闭锁的直接原因。现有直流孤岛过电压控制主要集中在换流站侧，没有充分发挥发电机的电压控制能力。为了更好解决直流闭锁后的过电压问题，还需要深入研究PSS反调的解决方案，并充分发挥机组的励磁调节作用。提出了广域 PSS 和高压侧电压控制的技术思路并进行了仿真验证。
이운엄직류2013년“5·26”고도조시중단겁폐쇄시험도치쌍겁폐쇄사건위례，분석료고도방식하단겁폐쇄후직류계통무공공제급발전궤려자계통적향응특성。지출료궤조전력계통은정기(PSS)존재적반조현상현저악화료고도계통적과전압문제，직류무공공제대대우동후빈솔、전압변화적괄응성불족시도치쌍겁폐쇄적직접원인。현유직류고도과전압공제주요집중재환류참측，몰유충분발휘발전궤적전압공제능력。위료경호해결직류폐쇄후적과전압문제，환수요심입연구PSS반조적해결방안，병충분발휘궤조적려자조절작용。제출료엄역 PSS 화고압측전압공제적기술사로병진행료방진험증。
With the incident of the bipole trip caused by a monopole trip in the on-site commissioning of Yunnan-Guangdong high-voltage direct current(HVDC) islanded operation on May 26,2013 as an example,the response characteristics of the HVDC reactive power control and generator excitation system after the monopole trip are analyzed.It is pointed out that the anti-regulation with power system stabilizer(PSS)has significantly worsened the overvoltage problem of the islanding system, and inadequate adaptability of the HVDC reactive power control for the frequency and voltage changes after a large disturbance is the direct cause of the bipole trip.The existing overvoltage controls of the islanded HVDC sending system are mainly concentrated on the converter station side,without fully utilizing the voltage control capabilities of generators.In order to better solve the temporary overvoltage problem after HVDC trips,further study on the solution to the PSS anti-regulation problem is required to bring the role of the excitation regulator into full play.The technological ideas of wide-area PSS and high voltage side voltage control are proposed and verified by simulation.