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水电机组在实际工作中长时间落入振动区会导致水轮机组寿命减少甚至损坏。目前的电力电量平衡计算大多仅以经济效益为目标,而忽略机组振动区的问题,从而对实际生产造成影响,其经济性亦无法保证。为此,在建立水电机组电力电量平衡模型的基础上,以经济性最优为目标,首先在不考虑振动区的情况下采用变步长搜索算法得到每个机组的初始出力分配;再采用等量替代法调整此初始分配优化得到最终运行策略。实例仿真分析表明,经等量替代法优化得到的水电机组优化运行方案,可保证每个机组在最优经济性运行的前提下完全避开振动区工作,具有极高的实际应用价值,可为类似工程提供参考。
Hydropower units in actual work for a long time falling into the vibration zone will lead to the life of the turbine to reduce or even damage. At present, the calculation of power balance mainly focuses on the economic benefits but ignores the problems of the unit’s vibration zone, which will affect the actual production and its economy can not be guaranteed. Therefore, on the basis of establishing the power and power balance model of hydroelectric generating set, the optimal output of the hydroelectric generating set is taken as the objective. First, the variable-length searching algorithm is used to obtain the initial output allocation of each generating set without considering the vibration zone. The volume replacement method adjusts this initial distribution optimization to get the final run strategy. The simulation results of the examples show that the optimal operation plan of hydropower units, which is optimized by the equivalent replacement method, can ensure that each unit can completely avoid the work of vibration zone under the premise of optimal economy operation, which is of high practical value. Similar projects provide a reference.