A robust scheduling method for power systems with phase shifters

Abstract

The invention discloses a phase shifter containing power system robust scheduling method. The method comprises the following steps: presetting conventional generator set cost coefficient and upper and lower force limits, phase shifter control parameters, power transmission branch reactance value and maximum transmission capacity, energy storage system control parameters, and fluctuation interval range calculating parameters of system load and wind power; modeling the tide control mode of a phase shifter, and constructing a tide mode of a phase shift injection mode with a compensation method; according to the incidence relation of system branch reactance and node branches, forming a system node injection transfer factor base; considering a responding mechanism of system for nondeterminacy; expressing the uncertainty such as power and load in an affine arithmetic mode, and carrying out construction of an optimization model; and processing tide constrains in an affine interval mode in the optimization model. The method can be used for coordinated decision of tide control equipment and power operation mode, so that the economical efficiency of system operation can be improved.

Description

Technical field [0001] The invention relates to the technical field of power grid dispatching, in particular to a robust dispatching method for a power system containing a phase shifter for short-term operation dispatching of a power system. Background technique [0002] Under the new situation, the widespread access of wind power, photovoltaics and other renewable energy power generation and the diversified development of node load forms have increased the uncertainties in the operation of the power grid, posing new challenges to the power grid dispatching. For this reason, how to improve the power grid's ability to deal with disturbances and enhance the robustness of dispatching decision-making is the core issue facing the current power grid dispatching. As an important means of steady-state power flow control of the power system, phase shifters can improve the transmission capacity of the power grid and realize the controllability of the power grid operation. How to make full...

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Problems solved by technology

The Chinese patent with the patent number ZL201310610999.7: "A scheduling method for realizing robust operation of power system" discloses a scheduling method for realizing robust operation of power system, which simultaneously considers forecast information, current operation information and historical operation The rolling coordination technology of information and the robust operation interval of the system are obtained. The mobilization plan is not limited to a unique predetermined value, and flexible scheduling within the robust interval can be realized, but it does not consider the backup response mechanism of the system, and the scheduling result is difficult to guarantee Feasibility under actual uncertain scenarios

The Chinese patent with the patent number ZL201410134744.2: "A real-time scheduling method for AGC units based on an effective static security domain" discloses a real-time scheduling method for automatic power generation control units based on an effective static security domain, which is constructed based on static security domain analysis A real-time dispatching model with the priority objectives of maximizing the system's ability to stabilize disturbances and minimizing the system's power generation cost and backup cost is established, which can improve the economics of power grid operation to a certain extent under the premise of ensuring the safety of power grid operation under uncertainty , but this invention is only aimed at single-period static dispatching under constant grid structure parameters. The core of real-time dispatching under uncertainty lies in how to use the controllability of grid operation to deal with the problem of time-varying ratio fluctuations, that is, to adapt to the rate of unit adjustment problem, which does not involve, and thus has certain limitations

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