Rapid frequency response reserve capacity planning method considering risk preference

Abstract

The invention provides a rapid frequency response reserve capacity planning method considering risk preference. According to the method, a reserve planning scheme is set up for events threatening system frequency security by additionally adding rapid frequency response reserve capacity so as to cope with a new situation of power system frequency stability; the transient change process of the system after the accident is focused, the risk attention range is quantified, and the accident deterioration risk based on the whole accident set power vacancy underestimation is avoided; an equipment state is simulated based on a random production simulation method, and second-level dynamic change is captured by taking frequency dynamic simulation analysis as a means on the basis of a traditional cost income analysis method; the attention degrees of different levels of accidents are considered according to risk preference; the feasibility of the scheme is checked from the perspective of checking the cost, and a corresponding confidence index is obtained. and for a fast frequency response standby planning demand, a transient state change process after an accident is considered, risk preference is considered, subjective analysis capability of a decision maker is taken into consideration factors of a planning process, a planning scheme can be adjusted according to a power grid operation condition and a regional safety level requirement, and the method is more flexible.

Description

technical field [0001] The invention belongs to the field of power grid frequency stability control requirements, and relates to the problem of fast frequency response backup planning, in particular to a fast frequency response backup capacity planning method considering risk preference. Background technique [0002] The power system reserve is the additional equipment capacity that can still guarantee the power balance demand under extreme circumstances such as equipment failure. With the power supply showing high penetration of clean energy and the grid structure shifting to long-distance high-pressure transmission, the proportion of conventional units has been reduced and accidents have escalated. In the past, the base of thermal power was large, the proportion was high, and the system inertia was sufficient. The extensive reserve retention method with a fixed coefficient naturally met the frequency adjustment requirements. The emergency reserve is oriented to various ne...

AI Technical Summary

Problems solved by technology

However, the current situation of "double low" under the background of "double carbon" in the power system has led to a sharp increase in the demand for frequency response.

[0003] Aiming at the problem that the traditional reserve method is rough and does not match the security situation of the modern power grid, the present invention faces the need for frequency stability of the power grid under the new situation, and studies the problem of fast frequency corresponding reserve planning

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