economic disturbance
1.Disturbance of the orderly functioning of the social economy or disruption of the state economic plan by any organization or individual is prohibited.
2.Disturbance of the orderly functioning of the social economy or disruption of the State economic plan by any organization or individual is prohibited," shall be changed to: "The state has put into practice a socialist market economy.
3.Theory analysis and experiments (for 6kV system) proved that this new type Petersen coil has wider adjustable range (25A~50A) , more rapid response speed( less than 5 periods), better linearity of C-V characteristic and less harmonic disturbance. Thus its application has a good prospect in improving the safety and reliability of the power distribution system, and also the economic benefits to the society.

