A study on the energy regeneration system of boom for hybrid hydraulic excavator
Nowadays, energy crisis and pollution have become a serious problem in the world. Saving energy of construction machinery, especially the hydraulic excavator is very essential. Potential gravitational energy regeneration is an effective solution to reduce the energy consumption of the hydraulic excavator. This paper proposes a new hybrid hydraulic excavator boom system and designs a new control strategy. In this system have three modes for boom down. The proposed energy regeneration system is verified through simulation result which is done in the AMESim software. By analyzing simulation result, the proposed system can perform very efficiently. Meanwhile, the proposed system is also compared with conventional one. By comparing and analyzing the simulation results, it seen that the new system has a better efficiency and decrease the energy consumption significantly. All parameters are taken from the real system.
Power system hourly price is closely related to power energy marginal cost and risk cost.By stochastic production simulation,the optimal generation scheduler,fuel cost,system marginal cost and reliability indices can be obtained.Based on the stochastic production simulation results,three electricity pricing models and the principle of partition of the peak-valley electricity price are discussed.At last,a practical power system is utilized to obtain the different power system hourly prices and the ratio of peak-waist-valley price,which can provide references for the establishment of the actual power price.