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1.国网冀北电力有限公司电力科学研究院,北京市100045
2.国家电网有限公司华北分部,北京市100010
梁浩(1987—),男,通信作者,硕士,高级工程师,主要研究方向:发电机励磁系统理论分析、涉网性能检测以及现场试验等。E-mail:672442478@qq.com
谢欢(1979—),男,博士,教授级高级工程师,主要研究方向:发电机励磁控制系统理论分析、大电网仿真计算、网源协调等。E-mail:xiaosan_616@aliyun.com
王聪(1988—),男,博士,高级工程师,主要研究方向:电网调度运行、电网仿真分析、网源协调技术管理等。E-mail:jingying8088@126.com
收稿:2022-01-27,
修回:2022-04-15,
网络出版:2022-09-27,
纸质出版:2022-11-25
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梁浩,谢欢,王聪等.发电机深调进相工况下加速功率型电力系统稳定器特性分析[J].电力系统自动化,2022,46(22):192-199.
LIANG Hao,XIE Huan,WANG Cong,et al.Characteristic Analysis of Power-type Power System Stabilizer with Improved Rotational Speed Under Condition of Deep Peak Regulation and Leading Phase[J].Automation of Electric Power Systems,2022,46(22):192-199.
梁浩,谢欢,王聪等.发电机深调进相工况下加速功率型电力系统稳定器特性分析[J].电力系统自动化,2022,46(22):192-199. DOI: 10.7500/AEPS20220127001.
LIANG Hao,XIE Huan,WANG Cong,et al.Characteristic Analysis of Power-type Power System Stabilizer with Improved Rotational Speed Under Condition of Deep Peak Regulation and Leading Phase[J].Automation of Electric Power Systems,2022,46(22):192-199. DOI: 10.7500/AEPS20220127001.
加速功率型电力系统稳定器(PSS)在发电机深度调峰进相工况由于转速计算误差大导致功率低频振荡问题。文中结合现场功率振荡案例分析PSS产生负阻尼的原因。基于励磁装置采用电气量计算转速的主流方法,通过求解转速对有功和无功功率导数开展转速计算电抗参数灵敏度分析。研究在不同工况下电抗参数取值对转速计算误差影响。转速计算准确度与电抗参数以及机组运行工况相关,而且当电抗参数整定值偏大时,转速计算准确度随着机组有功降低、无功进相而变差。仿真测试和现场试验验证了理论分析的正确性,对转速计算所用电抗参数取值范围以及PSS试验注意事项提出指导建议。
The problem of low-frequency power oscillation is caused by the large rotational speed calculation error of the power-type power system stabilizer (PSS) with improved rotational speed under the condition of deep peak regulation and leading phase of the generator. In this paper
the cause that PSS produces negative damping is analyzed based on the case of field power oscillation. Based on the mainstream method for calculating rotational speed by electrical quantities of excitation device
the sensitivity analysis of reactance parameters in rotational speed calculation is carried out by solving the derivative of rotational speed to active and reactive power. The influence of reactance parameters on rotational speed calculation error under different operation conditions is studied. The accuracy of rotational speed calculation is related to the reactance parameters and the operation conditions of the generator unit. When the reactance parameter setting value is too large
the accuracy of rotational speed calculation becomes worse with the reduction of the active power of the generator unit and the advance of reactive power. Simulation test and field test verify the correctness of the theoretical analysis
and provide guidance and suggestions on the range of reactance parameters used for the rotational speed calculation and the precautions for PSS test.
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