Abstract
The comprehensive and effective utilization of multiple renewable sources involving water, solar, and other energies have been receiving more and more attention, and the coordinated dispatching considering multiple uncertainties has become one of the research focuses currently. To cope with the stochastic dispatching of cascaded hydro-PV-PSH (pumped storage hydropower, PSH) complementary power generation system, this paper has proposed a two-stage optimized dispatching method combining uncertainties simulation and complementary dispatching schemes optimization. Firstly, a modified PCPS (probabilistic chronological production simulation) method is proposed to simulate the uncertain power output of each energy type, and thus the complementary dispatching schemes and performance parameters are obtained. In the simulation process, a special treatment method combining overall uncertainties, overall dispatching measures, and interstage distribution for cascaded hydropower stations is given out. Secondly, a dual-objective optimized model considering reliability and economic performance and MOQPSO algorithm is introduced to calculate the optimal Pareto solution set of stochastic dispatching schemes. The results of the case study verified the feasibility and calculating performance of the proposed method in developing optimized dispatching schemes.
Highlights
Facing the global energy crisis, the comprehensive utilization of renewable energies involving solar, wind, hydropower, biomass, geothermal energy, and so forth [1] might be a feasible solution. e research of hybrid power generation of multiple renewable energies has achieved lots of remarkable progress reflected in the following aspects. e designing and planning of HREGS is taken as a research focus, and it contains optimal overall sizing [2] and unit sizing [3] of the hybrid system, configurations [4,5,6] and placement [7] of each unit, and optimal planning and design [4]
Various analyses on HREGS such as cost [3, 8] and technoeconomic [9, 10] analysis, performance [11] and feasibility analysis, market evaluation, environmental and social benefits analysis, reliability [10, 12] and power quality assessment, and so forth are another research interest. e business model [13] of HREGS is an emerging research hotspot recently. e stochastic and intermittent nature of renewables and the complex coupling of multiple uncertainties from the hybrid power system have become the largest barriers to the utilization of renewables [14, 15]. erefore, aspects of modeling of the hybrid system [4, 15], uncertain output forecasting [16], multirenewable energies management [17], control [5, 6], dispatching [18, 19], and operation [20] strategies, which are different from general topics, should be taken seriously to research with more investment
Given the drawbacks of the PPS technique when applied to HREGS, a modified PPS technique considering the chronological characteristics of the system [36], named PCPS technique, is introduced to optimize the coordinated dispatch strategy for HREGS, and the uncertainties of multiple renewables are properly formulated by random failure probability. e PCPS technique could handle dynamic chronological constraints directly and obtain accurate reliability data efficiently. is technique provides an outstanding solution to the multiple uncertainties and complex coupling of HREGS
Summary
Facing the global energy crisis, the comprehensive utilization of renewable energies involving solar, wind, hydropower, biomass, geothermal energy, and so forth [1] might be a feasible solution. e research of hybrid power generation of multiple renewable energies has achieved lots of remarkable progress reflected in the following aspects. e designing and planning of HREGS (hybrid renewable energy generation system, HREGS) is taken as a research focus, and it contains optimal overall sizing [2] and unit sizing [3] of the hybrid system, configurations [4,5,6] and placement [7] of each unit, and optimal planning and design [4]. Given the drawbacks of the PPS technique when applied to HREGS, a modified PPS technique considering the chronological characteristics of the system [36], named PCPS (probabilistic chronological production simulation) technique, is introduced to optimize the coordinated dispatch strategy for HREGS, and the uncertainties of multiple renewables are properly formulated by random failure probability. The joint complementary power generation system consisting of cascaded hydropower, PV, and PSH is taken as the research object to study the coordinated dispatching strategy of the complementary system composed of multiple renewables. En, the comprehensive framework of PCPS for the hybrid system is obtained, and the dispatching strategy set is obtained through the coordinated PCPS technique On this basis, a dual-objective optimal dispatching model considering reliability and economic performance is proposed, and the MOQPSO algorithm is introduced to calculate the optimal Pareto dispatching solution set.
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