ABB KUC755AE105 励磁控制模块同步发电机的励磁系统在稳态或暂态过程中,都直接影响着发电机的特性。优良的励磁系统不仅可以保证高质量的电能、发电机运行的可靠性和稳定性,而且可以有效地提高发电机及其相关的电力系统的技术经济指标。同步发电机在投入电网运行之前要求其电压能维持在给定值即发电机空载运行条件下其励磁控制系统必须稳定运行。当发电机并入电网以后,就与电力系统史所有发电机组并联运行因此要求发电机的励磁控制系统能对电力系统稳定运行产生有益的影响。
KUC755AE105
ABB KUC755AE105 励磁控制模块如果在电力系统稳定计算中，忽略了励磁调节系统的作用则很难求得令人满意的结果。除了稳定问题外,在运行中往往对励磁控制系统的动态性能指标和控制精度提出要求。电力系统设计规程对励磁控制系统的要求为:根据规程要求,应从稳定性、动态性能、稳态性能三个方面对励磁控制系统进行分析和设计。
KUC755AE105
励磁控制系统的原理：同步发电机的励磁控制系统一般由励磁功率单元和励磁调节器两部分组成，励磁功率单元向同步发电机转子提供直流电流，即励磁电流;励磁调节器根据输入信号和给定的调节准则控制励磁功率单元的输出。ABB KUC755AE105 励磁控制模块整个励磁自动控制系统由励磁调节器、励磁功率单元和发电机构成的一个反馈控制系统。
KUC755AE105
The excitation system of ABB KUC755AE105 excitation control module synchronous generator directly affects the characteristics of the generator during steady-state or transient processes. An excellent excitation system can not only ensure high-quality electrical energy, reliability and stability of generator operation, but also effectively improve the technical and economic indicators of the generator and its related power systems. Before the synchronous generator is put into operation in the power grid, it is required that its voltage can be maintained at a given value, that is, the excitation control system of the generator must operate stably under no-load operating conditions. After the generator is integrated into the power grid, it will operate in parallel with all generator units in the history of the power system. Therefore, it is required that the excitation control system of the generator can have a beneficial impact on the stable operation of the power system.
KUC755AE105
If the ABB KUC755AE105 excitation control module ignores the role of the excitation regulation system in the stability calculation of the power system, it is difficult to obtain satisfactory results. In addition to stability issues, dynamic performance indicators and control accuracy of excitation control systems are often required during operation. The requirements of the power system design regulations for excitation control systems are: according to the regulations, the excitation control system should be analyzed and designed from three aspects: stability, dynamic performance, and steady-state performance.
KUC755AE105
The principle of excitation control system: The excitation control system of a synchronous generator generally consists of two parts: an excitation power unit and an excitation regulator. The excitation power unit provides direct current, i.e. excitation current, to the rotor of the synchronous generator; The excitation regulator controls the output of the excitation power unit based on the input signal and given regulation criteria. ABB KUC755AE105 Excitation Control Module The entire excitation automatic control system is a feedback control system composed of an excitation regulator, excitation power unit, and generator.
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