考虑分布式煤改电负荷接入的配电网运行调度控制策略研究

Research on Dispatching Control Strategy Considering Distributed Coal-to-Electricity Load Access to Distribution Network

摘要:

大规模的煤改电用负荷的投入对本身薄弱的配电网造成较大的负担。高峰时期用户使用电供暖设备数量持续增加、使用时长逐渐延长，造成局部台区、线路重载及过载运行，给吐鲁番电网安全稳定运行带来了威胁。在考虑“煤改电”负荷接入配电网的网架下，首先，通过调研吐鲁番“煤改电”工程接入模式和设备种类，建立“煤改电”标准化配置模式及产品分类统计；然后，基于电路模拟的等效热参数模型建立运行典型电供暖配置模式下的运行机理模型，研究直接负荷控制技术进行“煤改电”负荷控制。选取吐鲁番市完成“煤改电”工程改造的台区重过载运行进行实例分析，调度控制策略成功将变压器运行在安全边界以内，且不影响用户采暖的热舒适度。

Abstract:

The large scale load input of coal-to-electricity has caused a great load burden to the weak distribution network, and during the peak period, the number of electric heating equipment used by users continues to increase and the use time gradually extends, resulting in heavy load and overload operation of local stations and lines, which has brought threats to the safe and stable operation of Turpan power grid. In consideration of grid frame for coal-to-electricity load access to distribution network, the access mode and equipment types of coal-to-electricity project in Turpan are firstly investigated, and the standardized configuration mode of coal-to-electricity and product classification statistics are established. Then, based on the equivalent thermal parameter model of circuit simulation, the operating mechanism model of typical electric heating configuration mode is established, direct load control (DLC) technology is studied for load control of coal-to-electricity conversion. Finally, the heavy overload operation areas in Turpan that has completed coal-to-electricity conversion is analyzed, and the operation of transformers is controlled within the boundary by the dispatching control strategy successfully, and it does not affect the thermal comfort of user heating.