UPFC control strategy considering regional renewable energy consumption

Abstract

The invention discloses a UPFC control strategy considering regional renewable energy consumption. The UPFC control strategy comprises the steps of obtaining the real-time data during safe operation of a system; establishing a target function; solving a feasible region of the target function; solving the target function in the feasible region; carrying out feedback control on system loss accordingto the solution of the objective function. According to the control strategy, the established target function and constraint condition are closer to the current system operation condition, the network loss and the waste of renewable resources are reduced to the maximum extent, and the operation cost of a power grid is reduced; after an optimal operation point based on an OPF algorithm is obtainedthrough calculation, feedback control is carried out on the optimal operation point, and the advantages of small calculation amount and high control speed of a dynamic control strategy and the advantages of multi-target collaborative optimization based on an OPF algorithm operation strategy are fused, so that requirements for loss control, voltage out-of-limit control and line overload control when large-scale renewable resources are accessed in power grid operation can be met at the same time, and the absorption capacity of renewable energy sources of a regional power grid in safe and economical operation is improved.

Description

technical field [0001] The invention belongs to the field of power system UPFC control, and in particular relates to a UPFC control strategy considering the consumption of regional renewable energy. Background technique [0002] In recent years, my country has developed rapidly in the field of renewable energy such as wind power and photovoltaics. However, the fluctuation and uncertainty of power grid output have greatly limited the capacity of new energy grid connection and consumption, resulting in high curtailment of wind and light in the "Three North" region. These problems have seriously hindered the healthy development of renewable energy. In addition to factors such as peak shaving capacity and insufficient market space for consumption, the limitation of power grid transmission capacity is also one of the key factors restricting the consumption of renewable energy. [0003] The unified power flow controller (Unified Power Flow Controller, UPFC) has multiple control fu...

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Problems solved by technology

[0004] At present, there are usually two ways to use UPFC to solve the above-mentioned problem of renewable energy accessing the grid: real-time dynamic control strategy and operation strategy based on Optimal Power Flow (OPF) algorithm, among which real-time dynamic control strategy mostly uses feedback control To achieve fast and effective dynamic control, the control target is usually single and fixed

The operation strategy based on the OPF algorithm can realize the collaborative optimization of multiple control objectives and operating parameters with a large coupling degree, but its calculation amount is greatly affected by the system scale. Considering the influence of renewable energy generation and load fluctuations, the calculation process is relatively complex. Complicated, it is more difficult to calculate online in power grid operation

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