改进的火电调峰方式

针对汛期电力系统中水电在尽量减少或避免弃水而调峰能力不够时，火电参与调峰但各个时段出力不均匀的情况，提出了一种改进的火电调峰算法，以逐次切负荷法为基础，采用负荷控制的办法，避免了常规算法中对火电站计算结果进行逐个限制的复杂过程。该算法在尽可能减少火电站出力过程中连续启停机及连续升降的情况下，既能保证火电站相邻时段出力差满足爬坡速度要求，又保证了火电站全天各个时段出力尽量均匀。通过云南电网实际运行检验，所提出的火电调峰方法得到的结果更为合理，更能满足实际电网的调峰要求。

Improved Algorithm of Adjusting Discharge Peak by Thermal Power Plants

Thermal power plants should participate in adjusting discharge peak of power system in order to reduce or eliminate the water spill of hydro power plants in flood season. An improved algorithm of adjusting discharge peak of power system by thermal power plants is developed for eliminating fluctuating loads of thermal powers. This algorithm adopts the basic framework originated from the method of step by step cutting system loads and appends the restriction conditions on loads when cutting system discharge, therefore avoiding difficult judgment in the normal method of electric power and energy balance algorithm and decreasing open-off frequency of thermal power plants. Furthermore, the method has ensured not only the difference on two neighboring hours less than the rising rate of thermal power plant, but also produced the uniform loads. The application results of Yunnan electric power system show that the present method is more reasonable and easily meets the demand of adjusting discharge peak.