Active optimal control system of wind and light storage combined power generation system and method

Abstract

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

Description

technical field [0001] The invention relates to the field of new energy power generation, in particular to an active power optimization control system and method for a wind-solar-storage combined power generation system. Background technique [0002] Wind power and photovoltaic power generation have great fluctuations and uncertainties, but they are complementary to a certain extent. During the day, the sunlight is relatively strong, and the output of photovoltaic power generation is relatively large. At night, the wind speed is relatively high, and there is more wind power generation. This natural complementarity reduces the total output power fluctuation of wind power generation and photovoltaic power generation. With the development of wind power generation and photovoltaic power generation technology, the output power of wind power generation and photovoltaic power generation is controllable below the maximum power point, which lays the foundation for the coordinated con...

AI Technical Summary

Problems solved by technology

This has led to the problem of excessive charging and discharging times in the current energy storage power station, which reduces the service life of the energy storage power station. At the same time, because the energy storage power station does not consider the short-term overload capacity of the battery, the ability of the energy storage power station to stabilize power fluctuations is limited. restricted

[0004] Chinese patent (Application No.: 201110154373.0) "A Method for Allocation of Active Power of a Wind-solar Storage-Transportation Integrated Power Station" optimizes the active power of the wind-solar storage-transportation system based on dynamic targets, and coordinates the three parts of wind, solar and storage. However, Factors such as the short-term charge and discharge capability of the energy storage battery unit are not considered. In comparison, the present invention considers the short-term charge and discharge capability of the battery energy storage power station, avoids low-current charge and discharge, and optimizes the working range of the energy storage power station, so that The energy storage power station operates in the optimal interval as much as possible to improve the operating life of the energy storage power station

[0005] Chinese patent (Application No.: 201110426307.4) "Method and System for Distributed Micro-grid Island Operation Wind-solar-storage Combined Scheduling" provides a wind-solar-storage scheduling method suitable for micro-grids, which does not consider the operation performance of energy storage , it may cause too many over-discharge times of the energy storage battery, and at the same time may cause the occurrence of small current charge and discharge

[0006] Chinese patent (Application No.: 201210021356.4) "A Control Method for Wind-Storage-Storage Combined Power Generation System Participating in Power System Frequency" provides a method for participating in system frequency regulation, but this method does not consider the operation performance of energy storage, which may cause storage The battery can be over-discharged too many times, and it may cause low-current charging and discharging at the same time

[0007] To sum up, although the above-mentioned patents involve the active power optimization control method, these three patents do not consider the charging and discharging times of the energy storage power station, and do not take the charging and discharging times as an optimization target, which will lead to excessive power failure in the energy storage power station. Too many charge and discharge times reduces the operating life of the energy storage power station; at the same time, the existing patents do not consider the short-term overload capacity of the battery energy storage power station, which limits the performance of the energy storage power station and reduces the output of the tracking joint system of the energy storage power station Ability to change power

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