Research And Design Of Digital Excitation Regulator Based On Global Coordinated Control

Power system, a large-scale complex system, consists of three parts: gengration, transmission, and distribution, which should work as a whole. The stability of the power system is a global issue, concerning all the facilities of the whole system. Therefore, global coordinated control becomes a significant aspect in the stability control of power system.Synchronizing generator is the principle source of reactive power and the unique source of active power in generation system. Hence, synchronizing generator is critical in the research of power system stability. Generator control system mainly contains speed-regulating system and excitation system, while excitation regulator is the hardcore of excitation system. With the development of modern power system, the demand of the excitation regulator performance is promoted to a new level. Recently, digitization becomes an important aspect of modern excitation system because of the continuous progress of computer control technique. Compared with the conventional anologue regulator, the digital excitation regulator is characterized by its rich function, precise control and high reliability.Nowadays, digital excitation technique is quite mature. In this paper, we designed a digital excitation regulator based on global coordinated control. This regulator can both control the generator excitation reliably and communicate with CAN network interface, which enable the upper machine to control the regulator and satisfy the demand of global coordinated control well. In this paper, we first introduced the excitation system of the synchronizing generator briefly and analysed mathmatical model and dynamic characteristic of self-shunt excitation system in detail,then the conception of global coordinated control was proposed dealing with the problem of voltage stability. Consequently, in the forth chapter, we gave the software and hardware design proposal of excitation regulator, and results suggested that it could meet the needs of generator excitation and global coordinated control well.