含分布式电源和可调负荷的售电公司优化调度模型

售电公司是电力体制中售电侧改革的焦点,在电力市场环境下,售电公司承担着从市场购电并向用户供电的责任。分布式电源和可调负荷的发展,使得售电公司除从市场购电外,有了更多的供电选择,如何在竞争环境中既满足用户需求又提升自身运营效益是售电公司亟须研究的问题。将分布式电源和可调负荷纳入售电公司的优化调度中,综合考虑售电公司对运营经济性和安全性的要求,建立了以售电公司日前运营收益最大为目标的优化调度模型,并对模型中的非凸约束进行凸松弛,使之能够采用二阶锥优化的方法求解,最后采用修改后的IEEE 33节点配电系统进行算例验证。算例结果表明,通过对分布式电源和可调负荷的优化调度,可以使售电公司在降低运行成本的同时有效提升盈利空间,在保证所辖配电网安全运行的同时实现经济效益的最大化。

Optimal Dispatching Model of Electricity Retailers Considering Distributed Generator and Adjustable Load

The reform of electricity sales is an important part of power system reform, whose focus is electricity retailers. In the electricity market environment, selling electricity purchased from market to users is the responsibility of electricity retailers. The development of the distributed generator and adjustable load has given electricity retailers more choices in addition to power purchased from market. How to meet the need of users and increase operation profit is a problem demanding prompt study in a competitive environment. Distributed generator and adjustable load are considered in the optimal dispatching model of electricity retailers whose objective is to maximize the day-ahead operation profit. The security constraints on the distribution network are also considered in the model. This paper is intended to relax the non-convex constraints on the model in order to solve the model in second-order cone programming. Finally, the modified IEEE 33-bus distribution system is used as a test case. The results of a case study show that distributed generator and adjustable load is an effective supplement to the power supply mode of electricity retailers to maximize operation benefits in the market environment while ensuring the safety of the system.