Two-Level Optimization Method for Spinning Reserve in Wind Power System Considering Interruptible Load

doi:10.12204/j.issn.1000-7229.2020.11.015

Abstract

Abstract:

With the continuous expansion of wind power access, the fluctuation of the power system is increasing. The grid needs to configure more spinning reserve to suppress fluctuations of the power system and the forecast deviation of equivalent load. Traditional method that configures conventional spinning reserve capacity at a fixed proportion without considering other resources in the system has poor economy. Considering the further opening up of the ancillary service market and the characteristics of interruptible load, the interruptible load and conventional units are combined to participate in the ancillary service market. The proposed method is based on time scale, where the upper optimization has agreement with the capacity of the cost, the lower optimization call cost in real-time within days. The method constucts an optimal bi-level optimization objective function aimed at total expected cost. On the basis of the idea of serialization modeling, the system equivalent load forecasting deviation is discretized to obtain the corresponding decision expectation. The Commercial Software CPLEX is used to solve the objective function to obtain the interruptible load and the optimal reserve capacity of the conventional units. Finally, an example is given to verify the feasibility of the proposed method.

Key words: double layer optimization, wind power, spinning reserve(SR), interruptible load, ancillary market

CLC Number:

TM614

LI Peng, LI Fengting, HUANG Rong, TAO Renfeng, MA Xiaojun. Two-Level Optimization Method for Spinning Reserve in Wind Power System Considering Interruptible Load[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(11): 145-152.

Figures/Tables 8

Fig.1 Basic framework of the two-layer optimization model

Fig.2 Prediction deviation of system equivalent load

Table 1 Discretization of the prediction deviation of system equivalent load

Fig.3 Day-ahead capacity

Fig.4 Real-time call capacity

Fig.5 Comparison of call capacity results within days of scheme 1 and 2

Table 2 Comparison results of the economy of scheme 1 and 2

Table 3 Comparison results between the unit reserve price and the price parameters of interruptible load

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