Power System Optimal Operation With Carbon Capture Plants And Wind Power Under Low Carbon Economy

As the problem of global warming is increasingly more serious, global warming has become a problem in urgent need to be solved for all humanity. Meanwhile more carbon dioxide emissions from burning fossil fuels for power generation is one of the main reasons for this problem. Fossil fuels will serve as the main sources for power generation in the next few decades. Therefore, improving the energy efficiency, developing new energy technologies, promoting low-carbon economy and building a good living environment for all humanity are looming ahead. As the main source of carbon emissions, CO2 emissions of power industry account for about 40% of the national total CO2 emissions. In other words, the effect of power industry on the development of low-carbon economy is crucial. And it's necessary for power industry to applying effective measure, such as developing carbon capture and storage technology, wind power and other renewable energy to effectively reduce the CO2 emissions. Wind power integration to grid not only produces lots of electricity which is low carbon emissions and no pollution, but also puts forward new challenges for power system operation by making the peak load regulation more difficult. Lack of the peak load regulation is one of the main obstacles to integrate large-scale wind power. Besides, the output of wind power has the stochastic nature, which has caused a seriously effect in safety to the power system. And the volatility may destroy the active power balance. This situation must be considered when optimizing spinning reserve requirement of power system. As the direct carbon mitigation technique, carbon capture plant(CCP) has flexible operation characteristic, and the carbon capture output of CCP is treated as a new spinning reserve source for power system operation. Hence, how to consider the effect of carbon capture plants, wind power and the relevant factors of low-carbon economy introduced to power system coordinated operation and optimizing spinning reserve requirements reasonably, has important research value.In this paper, the problems of power system coordinated operation and optimal spinning reserve requirement with CCPs and wind power under low-carbon economy are studied. First, the CCP with solvent storage tanks is modeled. And the flexible operation and energy flow of CCPs are analyzed. In addition, the performances of carbon-capture plant in power peak-load shaving scheme and providing spinning reserve are clarified. Secondly, after the output characteristics of CCP and wind power are studied, a coordinated operation model of wind power and CCPs with solvent storage tanks is established, which can reduce wind power curtailment. Finally, due to the flexible operation characteristic of CCP, the carbon capture output of CCP is treated as a spinning reserve source for power system operation. On this basis, a model for optimizing spinning reserve requirement of power system with CCP and wind power is established to reduce the need for spinning reserve with large-scale wind power integration to power grid.The models and methods proposed in this paper have been strictly tested through IEEE 96-bus Reliability Test System. The results show that the models and methods proposed can better explain the problem of power system coordinated operation with CCPs and wind power under low-carbon economy and have a certain theoretical guidance significance.