基于分布式供能系统功率互动能力的双目标电压协调控制策略

Double-objective Coordination Control Strategy for Voltage Considering Interactive Capability from Distributed Energy System

间歇型分布式电源具有较强的波动性与随机性,其在薄弱配电网末端接入使得"源-网"之间的电气联系更加脆弱,并网点电压波动剧烈,电能质量受到影响。基于分布式供能系统功率互动能力提出了双目标电压协调控制策略。在研究分布式供能系统各单元的控制特性基础上,通过分布式供能系统的冷/热/电多能源优化调度来解决上游弱联系配电网末端电压波动问题。典型算例验证表明,该方法可在有效抑制并网点电压波动的同时,保障分布式供能系统运行的经济性。

Considering that intermittent distributed generations（DGs）have strong volatility and randomness,their integration to the end of a weak distribution network will form a fragile electrical connection between the source and network,which causes obvious voltage fluctuations at the connection points and thus affects the electricity quality.In order to solve this problem,a double-objective coordination control strategy for voltage is proposed considering the interactive capability of distributed energy system（DES）.Based on the control characteristics of different units in DES,the terminal voltage fluctuations of upstream weak distribution system are solved through the optimal scheduling of multiple energies,such as cooling,heating and power.Simulation results of a typical numerical example show that the proposed method can not only restrain the voltage fluctuations at the connection points,but also reduce the operation cost of DES.