Real-time control method of power plant grid-connected active power considering electricity trading plan

Abstract

The invention discloses a power plant grid-connection active power real time control method taking an electric quantity transaction plan into consideration, and belongs to the electric power system operation and control field. A ratio between a power plant electric quantity transaction completion rate and a transaction plan implementation progress is taken as an electric quantity transaction implementation rate index, a power plant low in electric quantity transaction implementation rate index, an intermittent new energy power station high in grid-connection prediction performance index, a power plant high in grid-connection active control performance index and an economical and environment-friendly power plant low in comprehensive cost per generating capacity get priority during grid-connection active real-time control, the above factors are taken as a target function, and a linear plan model considering safety and stability, active standby, power plant active adjusting capability, a power plant active plan, a power grid external power transmission channel active plan and a power balance constraint requirement that are related to electric quantity transaction plan implementation is built. The method of the invention helps to improve practicality of power plant grid-connection active power real time control.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control. More precisely, the invention relates to a real-time control method for grid-connected active power of a power plant taking into account the electricity trading plan. Background technique [0002] With the advancement of electric power reform, the scale of market-oriented transaction electricity is growing rapidly, and there are more and more market-oriented electricity transaction entities. Not only conventional energy power plants such as hydropower and thermal power participate in market-oriented electricity transactions, but also intermittent new energy power plants are also Gradually join the market-oriented electricity trading. The existing generation dispatch plan management for market-oriented electricity trading adopts a multi-time scale rolling correction technical solution, which consists of annual generation dispatch plan management, monthly generation dispa...

AI Technical Summary

Problems solved by technology

As far as the single power generation dispatching plan management module is concerned, the objective function does not take into account the differences in the control performance of grid-connected active power of different power plants in a quantitative way, and the difference between the prediction performance of grid-connected active power of different intermittent new energy power plants. difference, as well as the smoothing of the execution rate of transaction power of different power plants; the real-time network loss coefficient is not introduced into the active power balance constraint, and the accuracy of active power balance is not high; in addition, when the optimal solution cannot be obtained, no temporary Calculation Strategy of Relaxed Active Power Reserve

[0003] The proportion of market-oriented transaction electricity in the total electricity is relatively high, the safety and stability limit fluctuation of power grid transmission channels is relatively large, the proportion of intermittent new energy power in the total power generation capacity is relatively high, and the control performance of grid-connected active power of power plants varies greatly and intermittently. In the case of large differences in performance indicators of grid-connected active power prediction performance of new energy power stations, it is more difficult for existing technical solutions to meet the implementation requirements of market-oriented trading power plans and ensure the lowest comprehensive cost of economic and environmental protection per unit of power generation. However, it cannot provide spontaneous impetus for power plants to improve the control level of grid-connected active power and intermittent new energy power plants to improve the prediction accuracy of grid-connected active power

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