Abstract:

The low-voltage substation area is the link closest to the end user in the power system.Firstly,the environmental benefits of new energy power generation are analyzed by applying the theory of environmental economics and the pollutant emission standard of thermal power generation.The power generation characteristics of distributed photovoltaic are studied and the power consumption scenarios of its access to low-voltage power substations are analyzed.Then,taking the interruptible load in the low pressure substation area as the flexible resource for regulation and control,aiming at the maximization of social benefits,the two-level optimization model of operation and planning in the low voltage substation area is established.Finally,the example is given to illustrate that the proposed model can effectively improve the voltage quality of the substation area and the ability to cope with the fluctuation of new energy output.

Key words: low-voltage substation area, distributed photovoltaic, interruptible load, two-level optimization model