基于条件相关运行风险的发电调度优化模型

Optimal generation dispatch model based on condition-dependent operational risk

综合考虑实时运行条件对元件和电网运行可靠性的影响,构建基于条件相关运行风险的发电调度优化模型。将条件相关的运行风险评估与发电调度优化相结合,采用统一的货币形式量化发电机调度成本和风险代价,以期望总成本最小为目标函数,在满足正常和故障状态对应安全约束条件下寻求最优调度方案。同时,计及旋转备用响应特性以及可控串联补偿器(TCSC)对电网运行风险的影响,将机组输出功率再调整允许范围和TCSC补偿范围增至约束集中。该模型综合考虑了负荷水平、实时调度运行方式、潮流分布和运行风险的相互影响,实现了电网运行风险和发电成本均衡协调的最优调度决策。采用禁忌遗传优化算法对所建优化模型进行求解。RBTS测试系统的计算分析验证了所提模型和算法的有效性。

An optimal generation dispatch model based on the condition-dependent operational risk is built,which comprehensively considers the impact of real-time operating conditions on the reliability of components and grid. It combines the condition-dependent operational risk assessment with the generation dispatch optimization,applies the unified currency form to quantify the generator dispatch cost and risk cost,takes the minimum expected total cost as its objective,and searches the optimal dispatch scheme satisfying the security constraints in both normal and incident conditions. The allowable range of generator output power readjustment and the compensation range of TCSC are added to the constraint set to include the impact of spinning reserve response characteristics and TCSC（Thyristor Controlled Series Compensation）on the grid operational risk. The model considers comprehensively the interactive influence among load level,real-time dispatch operating mode,power flow distribution and operational risk,and realizes the optimal strategy of generation dispatch with balanced grid operational risk and generation cost. The tabu search genetic optimization algorithm is applied to solve the model. The calculative analysis for RBTS test system verifies the effectiveness of the proposed model and algorithm.