Distributed Multi-Time Slot Power Balancing Control of Power Systems with Energy Storage Devices

TL;DR

This paper presents a distributed control algorithm for multi-time slot power balancing in power systems with renewables, generators, and energy storage, optimizing power outputs over multiple time periods.

Contribution

It introduces a novel projection-based distributed algorithm for multi-time slot economic dispatch, applicable to general convex optimization problems with constraints.

Findings

Effective in coordinating power outputs over multiple time slots

Handles operational constraints including ramping and energy levels

Validated through case studies demonstrating practical utility

Abstract

This paper studies a crucial problem in power system balancing control, i.e., the multi-time slot economic dispatch (MTSED) problem, for power grids with substantial renewables, synchronous generators (SGs), and energy storage devices (ESDs). The target of MTSED is to optimally coordinate active/reactive power outputs of all controllable units to meet a forecast net demand profile over multiple time slots within a receding finite time horizon. Firstly, the MTSED is formulated as an optimization problem with operational constraints, including the limits on the output of each controllable unit, ramping rates of SGss, energy levels of ESDs, and bus voltages. Then, a novel projection-based algorithm is developed to solve the problem in a distributed way. In particular, the distributed algorithm is not limited to solving the MTSED problem but also applies to more general optimization problems with both generic convex objective functions and hard feasibility constraints. Finally, case studies verify the effectiveness of the proposed method.