Sensitivity analysis of system wind penetration to thermal generation ramp rates

摘要

Operating thermal generators flexibly enables them to achieve higher ramping up or down rates than usual. In this way, thermal generation can better follow the fluctuations of wind power, and the allowable penetration level of wind energy can thus be increased in the grid. In this paper, we analyze the sensitivity of allowable system wind penetration level to thermal generation ramp rates in an economic dispatch problem formulated as a linear programming. By using the “100% rule,” it is theoretically shown that the allowable wind power levels in the system are subject to an analytical joint constraint coupling all decision periods. Numerical tests on an IEEE 30-bus system are performed to demonstrate the theoretical results.