文章摘要
陈 中,朱政光,严 俊,等.计及时间特性交直流静态安全域下直流有功调整方法[J].电力系统自动化. DOI: 10.7500/AEPS20180917012.
CHEN Zhong,ZHU Zhengguang,YAN Jun, et al.DC Active Power Adjustment Method Considering Time Characteristics Based on AC/DC Steady-State Security Region[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180917012.
计及时间特性交直流静态安全域下直流有功调整方法
DC Active Power Adjustment Method Considering Time Characteristics Based on AC/DC Steady-State Security Region
DOI:10.7500/AEPS20180917012
关键词: 静态安全域  交直流系统  时间尺度耦合  有功控制域  最优调整曲线
KeyWords: steady-state security region  AC-DC hybrid system  time-scale coupling  active control region  optimal adjustment curve
上网日期:2019-08-13
基金项目:国家重点研发计划(2016YFB0900602)—《大型交直流混联电网运行控制和保护》
作者单位E-mail
陈 中 东南大学电气工程学院 zhongchen@seu.edu.cn 
朱政光 东南大学电气工程学院 18705157456@163.com 
严 俊 东南大学电气工程学院 yanj_nj_hn@foxmail.com 
陈 晖 东南大学电气工程学院 220152138@seu.edu.cn 
摘要:
      随着交直流混联系统状态及控制变量广域耦合程度不断提高,各元件时间响应特性差异巨大,系统的控制目标会因为各控制参数时间尺度的不协调而难以实现。为解决上述问题,在交直流混联系统静态安全域理论基础上研究了其边界曲面线性回归拟合及二维投影的刻画方法。在考虑安全域和控制设备时间参数的基础上,提出具有时间特性的控制安全域及域内最优调整曲线的通用模型。通过高压直流输电主回路参数计算得到直流输送有功和无功补偿、触发角、熄弧角以及变压器分接头等电气量的稳态关系,并依此结合计及时间特性控制安全域的刻画方法以完成直流有功控制域的表征,且在域内以整个调节时间内系统中敏感母线平均电压波动最小为优化目标给出最优调整曲线,从而保障交直流系统有功调整在时间维度上的安全性。基于改造的两区四机交直流混联系统进行仿真计算,验证了理论分析的正确性与可靠性。
Abstract:
      With the increasing wide-area coupling of the state and control variables of AC/DC hybrid systems, the time response characteristics of the components vary greatly, and the control objectives of the system are difficult to achieve due to the uncoordinated time scale of each control parameter. To solve the above problems, this paper studies two-dimensional projection of AC-DC hybrid system and linear regression fitting algorithm for boundary surfaces based on the theory of steady-state security region. Based on the security constraints and time parameters of control equipment, a general model for controlling the security region and the optimal adjustment curve in the region with time characteristics is proposed. Through the calculation of the main circuit parameters of HVDC transmission, the steady state relationship between the active and reactive power compensation, the firing angle, the extinction angle and the transformer tap is analyzed. On base of the calculation, the security region is controlled in combination with time characteristics. The characterization method completes the characterization of the DC active power control region, and gives the optimal adjustment curve in the region to achieve the goal of minimizing system voltage fluctuations during the entire regulation time, thus guaranteeing the global stability and security of the AC/DC system in time dimension. Based on the modified Two-area four-machine AC/DC hybrid system, simulation calculations verify the correctness and reliability of theoretical analysis.
查看全文   查看附录   查看/发表评论  下载PDF阅读器