The voltage stability is substantially a dynamic stability, but the primary method which is more mature and engineering practical to analyze the stability of voltage is still static analysis. The time-domain simulatio...The voltage stability is substantially a dynamic stability, but the primary method which is more mature and engineering practical to analyze the stability of voltage is still static analysis. The time-domain simulation is an important measure in research of complex power grid. With the development of full dynamic simulation technology, the research of dynamic voltage stability by using full dynamic simulation program which is based on time-domain simulation can be carried out. This paper uses full dynamic simulation program in dynamic voltage stability research, lays special stress on research in how generator over-excitation limiter functioned and influence in dynamic voltage stability research, and raise 2 methods and steps to figure out dynamic stable voltage in both over-excitation counted and not counted. The simulation results of examples indicate the correctness and effectiveness of these methods, and also fully verify the function and influence of generator over-excitation limiter in full dynamic voltage stability research.展开更多
现有电力系统稳定分析主要考虑励磁系统主环电压控制,而忽略励磁辅助控制环节(简称励磁辅环控制)的影响。现场运行经验表明,励磁系统辅环控制对发电机组动态品质及电网稳定性有着重要影响。以国内主流励磁调节器EXC9100为例,在分别建立...现有电力系统稳定分析主要考虑励磁系统主环电压控制,而忽略励磁辅助控制环节(简称励磁辅环控制)的影响。现场运行经验表明,励磁系统辅环控制对发电机组动态品质及电网稳定性有着重要影响。以国内主流励磁调节器EXC9100为例,在分别建立了含欠励限制、伏赫兹限制和过励限制这三种辅环控制的扩展Heffron-Phillips模型的基础上,采用阻尼转矩分析方法从理论上推导了这三种辅环控制的重要参数对电力系统稳定器(Power System Stabilizer, PSS)所提供的附加阻尼转矩以及其自身所提供的阻尼转矩的影响规律。最后结合发电机组实际运行工况,通过典型算例的仿真测试验证了所得规律的正确性和有效性。展开更多
文摘The voltage stability is substantially a dynamic stability, but the primary method which is more mature and engineering practical to analyze the stability of voltage is still static analysis. The time-domain simulation is an important measure in research of complex power grid. With the development of full dynamic simulation technology, the research of dynamic voltage stability by using full dynamic simulation program which is based on time-domain simulation can be carried out. This paper uses full dynamic simulation program in dynamic voltage stability research, lays special stress on research in how generator over-excitation limiter functioned and influence in dynamic voltage stability research, and raise 2 methods and steps to figure out dynamic stable voltage in both over-excitation counted and not counted. The simulation results of examples indicate the correctness and effectiveness of these methods, and also fully verify the function and influence of generator over-excitation limiter in full dynamic voltage stability research.
文摘现有电力系统稳定分析主要考虑励磁系统主环电压控制,而忽略励磁辅助控制环节(简称励磁辅环控制)的影响。现场运行经验表明,励磁系统辅环控制对发电机组动态品质及电网稳定性有着重要影响。以国内主流励磁调节器EXC9100为例,在分别建立了含欠励限制、伏赫兹限制和过励限制这三种辅环控制的扩展Heffron-Phillips模型的基础上,采用阻尼转矩分析方法从理论上推导了这三种辅环控制的重要参数对电力系统稳定器(Power System Stabilizer, PSS)所提供的附加阻尼转矩以及其自身所提供的阻尼转矩的影响规律。最后结合发电机组实际运行工况,通过典型算例的仿真测试验证了所得规律的正确性和有效性。
