Research on New Energy Power-carrying Capacity of East China Power Grid under the Constraints of Peak-shaving and Stability

As the layout of new energy during the 14th Five-Year Plan is inclined to Central and Eastern China, the development speed of new energy in Central and Eastern China will be higher than that in Western and Northern China, so it leads to more and more urgent to study the power-carrying capacity of new energy in the receiving-end power grid. In allusion to East China power grid that was regarded as typical receiving-end power grid, a method to evaluate the upper limit of new energy power-carrying capacity was presented. Firstly, relying on the electricity production simulation software which was independently developed by China electric power research institute, fully considering such factors as the scale of DC transmission, the abandoned electricity rate, the exchange section restrictions and energy storage application, in the context of satisfying the constraints of electric power and energy balance and peak balance the development scale of all kinds of power supply was optimally solved, thereby the upper limit of new energy power-carrying capacity constrained by peak-shaving was obtained. Secondly, based on the comprehensive simulation system called PSD-BPA, considering both the sensitivity of DC power and that of DC transmission scale, under the constraints of not triggering low-frequency load reduction by power vacancy of single DC transmission and satisfying the first level of security and stability standard, the timing simulation method was utilized to respectively obtain the upper limit of new energy power-carrying capacity constrained by frequency and voltage stability. Finally, by means of comparison and demonstration, the important influencing factors, power-carrying capacity and countermeasures restricting the development of new energy in East China power grid were proposed.