Study Of Hybrid Dynamic Reactive Power Compensation System

With the fast development of power electronics technology and increasing of power apparatus working at non-linear condition, a mass of harmonics and reactive are infused into the power system. They influence the quality of electric energy, decline the system's efficiency and the power factor, disturb other equipments, and influence the safe operation of power system and the power supply. So, to design a new equipment of suppression harmonic and reactive power compensation with quick response, economic efficiency and feasibility becomes a realistic and urgent task.The basic principle and the structure of reactive power dynamic compensation equipment, which is most widely used to compensate public power network, are discussed in the present thesis. And the hybrid reactive power dynamic compensation equipment - TCR+TSC+LC is designed based on the above study. The working principle of the equipment is: putting a certain amount of capacitors according to the required value of reactive power compensation (slightly over the required value), then compensating the overabundance portion with TCR, and wiping off the harmonic with LC filter (5, 7 and 11 harmonics are wiped by single tuning filter, while the > 11 harmonics are wiped by high-pass filter).LC filter is an important part of this hybrid reactive power dynamic compensation. The parameters of capacitor and inductive winding of LC filter change during operation with the changing surrounding temperature, the self-heating and the insulation ageing of capacitor, etc. During the installation and commissioning, there may exist errors that can deviate the actual parameters and correspondent harmonic oscillation frequency from the designed value and result in filter disarrangement. So the design of filter must be optimized. In the present thesis, basic genetic algorithm is improved and used to optimize the LC filter.Lastly, the TMS320C32 DSP digital system and the hardware/software solutions for this hybrid reactive power dynamic compensation system are designed and studied in the present thesis.