A hybrid renewable energy system, including photovoltaic (PV) plant, wind farm, concentrated solar power (CSP) plant, battery, electric heater, and bidirectional inverter, is proposed. The optimal combination of power plants and energy storage devices, and their optimal capacities are obtained by the multi-objective optimization algorithm. A superior operation strategy of the system, which consists of multiple energy storage technologies and flexible power supplies, is proposed. Results show that the PV plant with an inverter can generate power at the lowest cost but with poor reliability. The combination of the CSP plant and PV plant is an effective way to improve power generation reliability economically. When low investment costs of PV plant, battery, and inverter are adopted, the battery is preferentially integrated into PV plant to reduce the loss of power supply probability (LPSP) to a certain level. But it still cannot meet the high power generation reliability requirements. The CSP plant is still an essential technology to further significantly reduce LPSP with good economic performance. The operation strategy in which the power cycle takes precedence over the battery to supplement the power shortage is recommended. The levelized cost of energy (LCOE) of the system with power cycle output priority is 8.36% lower than that of the system with battery output priority when the LPSP is 1.34%.

提出了一种混合可再生能源系统，包括光伏（PV）电站、风电场、聚光太阳能（CSP）电站、电池、电加热器和双向逆变器。通过多目标优化算法得到电厂和储能装置的最优组合，以及它们的最优容量。提出了由多种储能技术和灵活电源组成的系统的优越运行策略。结果表明，带逆变器的光伏电站可以以最低的成本发电，但可靠性较差。光热电站与光伏电站的结合是经济上提高发电可靠性的有效途径。采用光伏电站、电池、逆变器投资成本低时，电池优先集成到光伏电站中，将供电损失概率（LPSP）降低到一定水平。但仍不能满足高发电可靠性要求。CSP装置仍然是进一步显着降低LPSP并具有良好经济效益的一项必不可少的技术。建议采用电源循环优先于电池的运行策略，以补充电量不足。当LPSP为1.34%时，具有功率循环输出优先的系统的平准化能源成本(LCOE)比具有电池输出优先的系统低8.36%。CSP装置仍然是进一步显着降低LPSP并具有良好经济效益的一项必不可少的技术。建议采用电源循环优先于电池的运行策略，以补充电量不足。当LPSP为1.34%时，具有功率循环输出优先的系统的平准化能源成本(LCOE)比具有电池输出优先的系统低8.36%。CSP装置仍然是进一步显着降低LPSP并具有良好经济效益的一项必不可少的技术。建议采用电源循环优先于电池的运行策略，以补充电量不足。当LPSP为1.34%时，具有功率循环输出优先的系统的平准化能源成本(LCOE)比具有电池输出优先的系统低8.36%。