Optimal Operation Method of CCHP System Based on Improved Following Thermal Load Mode

doi:10.16628/j.cnki.2095-8188.2023.06.004

Abstract

Abstract:

The combined cooling heating and power (CCHP) is an important way to improve the efficiency of energy intensive, deepen the transformation of energy system, and achieve the goal of “double carbon”goal. A CCHP system model including micro gas turbines, photovoltaic power supply, gas boilers and battery is simulated. Based on the common following thermal load mode and following electric load mode, an improved following thermal load mode is proposed. The proposed operation mode can effectively improve the cost-effectiveness and energy-effectiveness of system, and achieve a higher energy saving rate.

Key words: combined cooling heating and power (CCHP) system, improved following thermal load mode, photovoltaic power supply, energy saving rate

CLC Number:

TM732

YIN Guangzhi, GUO Zhen. Optimal Operation Method of CCHP System Based on Improved Following Thermal Load Mode[J]. LOW VOLTAGE APPARATUS, 2023, 0(6): 23-32.

Figures/Tables 15

状态		设备热能输出
状态1	(P_L+P_ER)<(P_PV+P_MT)<[(P_L+P_ER)+P_b,in]	$(1) H M T < (H H E + H A R) < (H G B + H M T) H M T = P M T η M T · (1 - η M T) · η r H G B = H H E + H A R - H M T$ $(2) H G B + H M T < H H E + H A R H M T = P M T η M T · (1 - η M T) · η r H G B = N G B H v a c a n c y = H H E + H A R - (H G B + H M T)$ $(3) H H E + H A R < H M T H w a s t e = H M T - (H H E + H A R)$
	P_grid=0,P_b,in=P_PV+P_MT-(P_L+P_ER)
状态2	(P_L+P_ER+P_b,in)<(P_PV+P_MT)
	P_grid>0,P_b,in=0.4N_b
状态3	(P_L+P_ER)<(P_PV+P_b,out+P_MT)
	P_grid=0,P_b,out=P_L+P_ER-(P_PV+P_MT)
状态4	(P_PV+P_b,out+P_MT)<(P_L+P_ER)<(P_grid+P_PV+P_b,out+P_MT)
	$P b, o u t = 0.4 N b P g r i d = P L + P E R - P P V + P M T + P b, o u t$

状态	设备热能输出	设备电能输出
状态1	$(H H E + H A R) < H M T H G B = 0, H M T = H H E - H H R$	$(1) (P M T + P P V) < (P L + P E R) < (P M T + P P V + P b, o u t) P M T = H M T (1 - η M T) · η r · η M T, P g r i d = 0 P b, o u t = P L + P E R - (P M T + P P V)$ $(2) (P M T + P P V + P b, o u t) < (P L + P E R) < (P M T + P P V + P b, o u t + P g r i d) P g r i d = P L + P E R - (P M T + P P V + P b, o u t) P b a t, o u t = 0.4 N b a t$ $(3) (P L + P E R) < (P M T + P P V) < (P L + P E R + P b, i n) P g r i d = 0, P b, i n = P M T + P P V - (P L + P E R)$ $(4) (P L + P E R + P b, i n) < (P M T + P P V) P g r i d = P M T + P P V - (P b, i n + P L + P E R) P b, i n = 0.4 N b, P M T = N M T$
状态2	$H M T < (H H E + H A R) < (H M T + H G B) H M T = N M T, H G B = H H E + H H R - H M T$
状态3	$(H M T + H G B) < (H H E + H A R) H M T = N M T, H G B = N G B H v a c a n c y = H H E + H A R - (H M T + H G B)$

状态	设备热能输出	设备电能输出
相关状态	H_MT=H_MT.rate= $N M T η M T$ ·(1-η_MT)·η_r	$(1) (P M T + P P V) < (P L + P E R) < (P M T + P P V + P b, o u t) P g r i d = 0, P b, o u t = P L + P E R - (P M T + P P V)$
状态1	$H M T < (H H E + H H R) < (H M T + H G B) H M T = H M T . r a t e, H G B = H H E + H H R - H M T$	$(2) (P M T + P P V + P b, o u t) < (P L + P E R) < (P M T + P P V + P b, o u t + P g r i d) P b, o u t = 0.4 N b a t P g r i d = P M T + P P V + P b, o u t - (P L + P E R)$ P_b,in≥0,P_MT=P_MT.rate=N_MT
状态2	$(H M T + H G B) < (H H E + H H R) H M T = H M T . r a t e, H G B = N G B H v a c a n c y = H H E + H A R - (H M T + H G B)$	$(3) (P M T + P P V) < (P L + P E R + P b, i n) P g r i d = 0, P b, i n = P M T + P P V - (P L + P M T)$
状态3	$(H H E + H H R) < H M T H G B = 0, H w a s t e = H M T - (H H E + H H R)$	$(4) (P L + P E R + P b, i n) < (P M T + P P V) < (P L + P E R + P b, i n + P g r i d) P g r i d = P M T + P P V - (P b, i n + P L + P E R) P b, i n = 0.4 N b a t$

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设备类型	设备安装单价/ (美元·kW^-1)	折旧年限/ a	K_om,_i/ (美元·kWh^-1)
光伏发电单元	1 500	20	0.002 05
微型燃气轮机	1 133	15	0.026
燃气锅炉	50	10	0.002 7
电制冷机	162	10	0.001 6
吸附式制冷机	200	10	0.002 4
蓄电池组	200	5	0.001 06
热交换机	33	10	0.001

约束类型	单位	范围
光伏系统的容量约束	kW	(0,400)
微型燃气轮机的容量约束	kW	(0,500)
CCHP与电网的电能交换约束	kW	(0,400)
电池的容量约束	kW	(0,max(E_l))
燃气锅炉的容量约束	kW	(0,500)
电池的充放电约束	kW	(0,0.4N_bat)

运行模式	日运行总成本/美元
以电定热	755.68
以热定电	746.83
改进型以热定电	720.95

运行模式	R_ATCS	R_EIS	R_PES
以电定热	-20.812 6	0.445 2	0.248 5
以热定电	-23.337 4	0.564 0	0.331 2
改进型以热定电	-23.337 0	0.618 5	0.361 1