Study on Participation of Electricity-driven Thermal Load in Real-time Scheduling of New Power System

doi:10.12096/j.2096-4528.pgt.21122

Abstract

Abstract:

The power balance of the new power system mainly based on new energy is facing an important technical challenge, and the participation of flexible load in power system regulation is an important way to enhance the active balance capability of the new power system. In view of the obvious seasonal and temporal characteristics of the electric and thermal loads, the new energy sources are “extremely cold and hot without wind” and “late peak without light”, and the thermoelectric loads in the new power system show the trend of anti-peak regulation. To address this problem, this paper analyzed the spatial and temporal characteristics and energy-use characteristics of electric and thermal loads, explored their regulation potential, focused on the control scenarios of electric and thermal controllable loads, and systematically gave a flexible scheduling strategy for electric and thermal loads to complete the flexible control and regulation of electric and thermal loads. The results realize the network-load cooperative optimization and flexible scheduling on the whole time scale, and thus verify the feasibility of the real-time participation of telectric and thermal loads in the scheduling of the grid.

Key words: new energy, new power system, source network load storage, electric and thermal loads, adjustable load resources, flexible control

CLC Number:

TK 01

Xin YIN, Feng ZHANG, Balati ADILI, Xiqiang CHANG, Wuhui CHEN, Changjun LI, Xueming LI, Shaowei YUAN. Study on Participation of Electricity-driven Thermal Load in Real-time Scheduling of New Power System[J]. Power Generation Technology, 2023, 44(1): 115-124.

Figures/Tables 13

Tab. 1 Capacity distribution of electric and thermal loads in a certain area

区域	电热负荷容量	分散式电热负荷		集中式电热负荷
区域	电热负荷容量	直热式	蓄热式	直热式	蓄热式
1	634.1	76.9	197.2	80.4	279.6
2	656.4	59.9	342.8	56.8	196.9

Tab. 2 Distribution of maximum electric and thermal loads in a certain area

区域	预计电热最大负荷	分散式电热最大负荷		集中式电热最大负荷
区域	预计电热最大负荷	直热式	蓄热式	直热式	蓄热式
1	412.6	50.9	126.5	43.2	192
2	201.1	10.8	87.8	45.7	56.8

Tab. 3 User distribution of electric and thermal loads in a certain area

区域	电热负荷用户	分散式电热负荷用户		集中式电热负荷用户
区域	电热负荷用户	直热式	蓄热式	直热式	蓄热式
1	12.62	1.43	7.78	0.07	3.34
2	81.92	0.17	79.68	0.19	1.07

Fig. 1 Average power load curve of electric heating in a regional power grid in December 2020

Fig. 2 Average power load curve of electric heating in 4 regions with the highest load in December 2020

Fig. 3 Typical industry’s average electricity load curve for electric heating in December 2020

Fig. 4 Typical daily load curve of distributed electric and thermal loads

Tab. 4 Electric and thermal adjustable loads in each region

地区序号	预计电热最大负荷	可调节负荷
总计	631.7	49.7
1	103.5	20.7
2	25.0	5.0
3	28.9	6.3
4	34.5	2.5
5	0.7	0.0
6	11.4	0.0
7	28.8	0.0
8	76.1	0.0
9	10.8	4.4
10	92.9	0.0
11	25.9	0.0
12	50.0	0.0
13	55.6	10.8
14	1.6	0.0
15	68.0	0.0

Fig. 5 Flexible dispatch topology diagram of electric and thermal loads

Fig. 6 Output balance comparison of electric and thermal loads before and after day-ahead dispatch

Fig. 7 Response of flexible electric and thermal loads before and after day-ahead dispatch

Fig. 8 Output balance comparison of electric and thermal loads before and after intra-day dispatch

Fig. 9 Response of flexible electric and thermal loads before and after intra-day dispatch

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