Allocation Method of Emergency Reserve Capacity in Power System

Abstract

The present invention provides a power system emergency reserve capacity configuration method. The method comprises: a system secondary frequency modulation reserve R2 is determined according to a cost effectiveness method; the system secondary frequency modulation reserve R2 is taken as a basis, and the maximum steady state frequency fluctuation [Delta]fw,0 of a system after the occurrence of an extra high-voltage direct current bipolar locking fault is simulated and determined; if the [Delta]fw,0 is larger than an allowable limit, a generation side and a load side are taken as reserved sources, a lowest cost is the standard, and an added primary frequency modulation reserve [Delta]R1,w is determined, or else, the [Delta]R1,w is equal to zero; the R2 and the [Delta]R1,w are taken as a basis, the maximum frequency fluctuation [Delta]fh,0 of the system after the occurrence of an extra high-voltage direct current bipolar locking fault is simulated and determined; if the [Delta]fh,0 is larger than an allowable limit, the generation side and the load side are taken as reserved sources, the lowest cost is the standard, and an added inertia response reserve [Delta]R1,h is determined, or else, the [Delta]R1,h is equal to zero; and finally, an optimum emergency reserve capacity R in an electrical area in the whole process of frequency fluctuation after a large-scale direct current locking fault is determined. The power system emergency reserve capacity configuration method is able to improve the transient state safety level of a system after the occurrence of faults so as to comprehensively guarantee the safety of the system after the occurrence of faults.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric power system dispatching, and in particular, to a method for configuring emergency reserve capacity of electric power systems. Background technique [0002] The formulation of backup plan is one of the important means to maintain the reliability level of the power system and ensure the safe and stable operation of the system, and the method of determining the emergency backup capacity is the main content. [0003] In the prior art, a deterministic method is generally used to determine the emergency reserve capacity of the system, that is, it is determined according to the maximum unit capacity in the system or a certain percentage (generally 8% to 10%) of the peak load of the system. The current determination method for emergency reserve capacity defines the relevant requirements for emergency reserve capacity from the perspective of total reserve capacity, that is, mainly f...

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Problems solved by technology

[0004] After the accident, the power shortage caused by the accident will lead to the imbalance of power generation and load power, especially when a large-scale DC blocking fault occurs, the system frequency will drop significantly, and the safe and stable operation of the power system cannot be guaranteed.

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