Low-Carbon Economic Dispatching in Industrial Park Considering Dynamic Constraints of CHP Units

doi:10.12204/j.issn.1000-7229.2022.12.013

Abstract

Abstract:

The CHP unit with fast power output adjustment can improve the operation flexibility of the electrothermal coupling system in the industrial park and promote the absorption of new energy and reduce carbon emission. The CHP dynamic constraints in the form of differential equations can describe the variation of variables in detail, and considering dynamic constraints in dispatching can grasp the operation state of units and reduce the risk of accidents. Therefore, aiming at the minimum cost of industrial parks and considering carbon trading process, a low-carbon economic dispatching model of industrial parks considering CHP dynamic constraints is established. Then, on the basis of the sequential framework, the differential algebraic equations of the simulation layer are discretized by the orthogonal configuration method on finite element, and the nonlinear programming problem of the optimization layer is solved by the improved adaptive differential evolution algorithm. The results of examples show that the orthogonal configuration method can obtain accurate results with fewer discrete points, improve the solving efficiency, and the CHP unit with fast power output adjustment can effectively improve the low-carbon economic level of the industrial park.

Key words: industrial park, economic dispatching, dynamic operation constraint, orthogonal collocation on finite element

CLC Number:

TM734

ZHANG Lei, ZHENG Dan, LU Tianlin, CHEN Qing, YE Jing, XIONG Zhizhi. Low-Carbon Economic Dispatching in Industrial Park Considering Dynamic Constraints of CHP Units[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(12): 122-130.

Figures/Tables 15

Fig.1 Structure of an IPEHS

Fig.2 Radau collocation point

Fig.3 Algorithm structure of the improved ADE

Fig.4 Improved IEEE 14-bus system

Fig.5 Power output in case 2 and 3

Table 1 Comparison of calculation results in case 2 and 3

Table 2 Cost of system dispatching

Fig.6 Power output in case 1 and 3

Table 3 Capacity of wind power consumption and carbon emission

Fig.7 Trend of CHP power output and heat extraction steam and steam pressure in case3

Table A1 Parameters of CHP unit

Table A2 Parameters of dispatching model

Fig.A1 Forecasting of wind power

Fig.A2 Forecasting of power load

Fig.A3 Forecasting of heat demand

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