A Calculation Error Analysis Method for Active Power and Voltage of Day-Ahead Planned Power Flow

Abstract

The present invention relates to a method for analyzing the calculation error of active power and voltage of day-ahead planned power flow, which includes: obtaining a set of power flow deviation lines, voltage deviation busbars and power flow deviation power generation loads; The sensitivity of the power flow deviation line and the error contribution degree of a single time point, or determine the sensitivity of the electric equipment to the voltage deviation bus and the error contribution degree of a single time point; determine the whole day 96 of the electric equipment according to the error contribution degree of a single time point point to the error contribution of the power flow deviation line or the voltage deviation busbar; the method provided by the invention can realize the automatic analysis of the planned power flow active power and voltage calculation error causes, and quickly analyze the key factors affecting the rationality of the planned operation mode, for Provided technical support to improve the rationality of the operation mode data of the dispatch plan.

Description

technical field [0001] The invention relates to a calculation and analysis method of a power system, in particular to a calculation error analysis method for active power and voltage of day-ahead planned power flow. Background technique [0002] Power grid security is related to national security. The safety and stability control of the large power grid is an important guarantee for the safe and stable operation of the power grid. With the gradual formation of the UHV AC-DC hybrid large power grid pattern in my country, the safety and stability characteristics and mechanism of the power system are becoming more and more complex, and the difficulty of power grid operation control is increasing. The accuracy of power system security and stability analysis puts forward higher requirements. [0003] The formulation of the current plan of the power grid is an important way to ensure the safe, orderly and efficient operation of the power grid. It can not only make the allocation o...

AI Technical Summary

Problems solved by technology

The accuracy of load forecasting is greatly affected by the randomness of weather and users, not only that, there are also certain errors in power generation plans, maintenance plans, contact line plans, and provincial general exchange plans

In addition, the scheduling plan lacks reactive power planning data, resulting in low accuracy of reactive power flow results in the generated planned operation mode data

[0005] At present, in analyzing the deviation between the day-ahead planned power flow and the actual operating power flow, it is difficult to quantitatively measure the deviation degree of the line power flow and the bus voltage, and there is no unified standard for measuring the degree of deviation. Therefore, the existing technology cannot correctly analyze the difference between the day-ahead planned power flow and the actual operating power flow The reason for the deviation, the load forecasting technology and various planning methods used in it are also difficult to guarantee the accuracy of the day-ahead plan. Planned power generation leads to a deviation between the power flow of the relevant line and the planned value, and the specific reason and degree of deviation between the power flow of this line and the planned value cannot be determined, and it is impossible to avoid the same deviation in future day-ahead planning

Images