Carbon emission characteristics model of thermal power units for environmental economic dispatch

doi:10.3969/j.issn.2097-0706.2022.11.008

Abstract

Abstract:

In the backdrop against carbon emission reduction campaign，constructing a CO₂ emission reduction characteristics model of thermal power units for power system environmental economic dispatch is crucial for achieving the goals of carbon peaking and carbon neutrality. According to the investigated data on the proportion of thermal power units in China， relationships between the units' capacity， load rate and CO₂ emission intensity are studied and the CO₂ emission intensities of the units of different capacities and under different load rates are compared. Based on least square method， a model for CO₂ emission reduction and load characteristics of thermal power units is made， and its satisfaction index is determined by bi-objective optimization algorithm. The mode can be solved by transforming the bi-objective problem to single objective problems. Based on the data of nine power units running for 24 h，a CO₂ emission reduction and load characteristics model is made for the units. Being able to reconcile the contradiction between coal consumption and CO₂ emission， the model is proven to be pragmatic and reliable for power system economic emission dispatch.

Key words: "dual carbon" target, environmental economic dispatch, thermal power unit, load, carbon emission, coal consumption, least square method

CLC Number:

TK229.6:X773

WU Junda, ZHAO Yi, SUN Wenyao. Carbon emission characteristics model of thermal power units for environmental economic dispatch[J]. Integrated Intelligent Energy, 2022, 44(11): 56-62.

Figures/Tables 10

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负荷率/%	300 MW		600 MW		1 000 MW
负荷率/%	煤耗	排放强度	煤耗	排放强度	煤耗	排放强度
50	340.2	913.2	314.1	833.2	304.2	797.5
60	337.8	898.7	311.3	827.1	299.1	793.1
70	333.3	883.6	308.5	820.5	293.5	788.3
80	328.8	870.1	306.7	815.3	288.3	784.2
90	322.9	849.5	304.2	808.1	284.7	781.7
100	319.6	836.3	302.1	803.5	281.2	776.5

机组容量/MW	a_i /[kg·(MW²·h)^-1]	b_i /[kg·(MW·h)^-1]	c_i /(kg·h^-1)
300	0.003 197 3	-1.999 896	1 099.869 3
600	0.001 057 6	-1.086 145	1 036.717 9
1 000	0.000 407 9	-0.637 698	981.822 9

机组编号	机组出力		煤耗成本系数			CO₂排放系数
机组编号	P_max/MW	P_min/MW	α_i /[美元·(MW²·h)^-1]	β_i /[美元·(MW·h)^-1]	γ_i /(美元·h^-1)	a_i /[t·(MW²·h)^-1]	b_i /[t·(MW·h)^-1]	c_i/(t·h^-1)
1	455	150	0.000 31	17.26	970	0.020	-2.72	132
2	455	150	0.000 48	16.19	1 000	0.022	-2.86	130
3	130	20	0.002 11	16.50	680	0.058	-2.35	130
4	130	20	0.020 00	16.60	700	0.044	-2.94	138
5	162	25	0.003 98	19.70	450	0.065	-2.36	125
6	85	25	0.000 79	27.74	480	0.075	-2.36	135
7	80	20	0.007 12	22.26	370	0.080	-2.28	110
8	55	10	0.004 13	25.92	660	0.082	-1.29	157
9	55	10	0.001 73	27.79	670	0.084	-2.14	138

时间	负荷/MW	时间	负荷/MW
01:00	625	13:00	1 250
02:00	600	14:00	1 200
03:00	750	15:00	1 100
04:00	850	16:00	1 000
05:00	900	17:00	900
06:00	1 000	18:00	1 000
07:00	1 025	19:00	1 100
08:00	1 100	20:00	1 300
09:00	1 200	21:00	1 200
10:00	1 250	22:00	1 000
11:00	1 325	23:00	800
12:00	1 350	24:00	725

模型	CO₂排放量/t	耗煤量/(t·h^-1)
Ⅱ	35 161	475.71
Ⅲ	23 437	475.09