Impact of Provincial Spot Market Clearing Results on the Power Flow Violation of Regional Synchronous Grid

doi:10.12204/j.issn.1000-7229.2022.06.004

Abstract

Abstract:

Inter-provincial interconnected large power grid can realize the optimal allocation of power resources on a larger scale and improve the consumption capacity of renewable energy. Under the current national unified market system of unified market and two-level operation, the inter-provincial transaction results of the inter-provincial market will be used as the boundary for the provincial market clearing. However, in a regional synchronous grid, if the power of AC inter-provincial tie lines is directly regarded as the injection power of boundary nodes in the provincial market, the power flow model will deviate from the actual power flow, and there will even be a problem of power flow violations. This paper firstly proposes the use of direct-dispatch units, which are directly dispatched by regional dispatch agencies to deal with the above-mentioned problem of power flow violations. Then, by analyzing the differences in the power flow models of the provincial and inter-provincial markets, this paper proposes to use the power of the inter-provincial tie lines and the phase angle differences of the boundary nodes as the boundary conditions of the provincial market at the same time, which realizes the correct calculation of power flow in the provincial market, thereby avoiding the problem of power flow violations. The effectiveness and feasibility of the above two solutions are verified and analyzed based on IEEE 39-bus system.

Key words: AC tie lines, provincial market, inter-provincial market, direct-dispatch unit, power flow violation, phase angle difference

CLC Number:

TM73

LI Xiaogang, YANG Libing, WU Min, WAN Jiahao, FENG Donghan, ZHOU Yun. Impact of Provincial Spot Market Clearing Results on the Power Flow Violation of Regional Synchronous Grid[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(6): 34-42.

Figures/Tables 13

Fig.1 Zonal partition diagram of the IEEE 39-bus system

Table 1

Fig.2 Results of inter-provincial market clearing (offering and bidding price scenario 1)

Fig.3 Results of provincial market clearing (offering and bidding price scenario 1)

Table 2 Power flow violation situation after applying two solutions (offering and bidding price scenario 1)

Table 3 Power flow of tie lines after applying two solutions (offering and bidding price scenario 1) MW

Table 4

Fig.4 Results of inter-provincial market clearing (offering and bidding price scenario 2)

Fig.5 Results of provincial market clearing (offering and bidding price scenario 2)

Table 5 Power flow violations situation after applying two solutions (offering and bidding price scenario 2)

Table 6 Power flow of tie lines after applying two solutions (offering and bidding price scenario 2) MW

Table 7 Power flow violations situation after changing direct-dispatch units (offering and bidding price scenario 2)

Table 8 Power flow of tie lines after changing direct-dispatch units (offering and bidding price scenario 2)MW

References 28

[1]	宋艺航. 中国电力资源跨区域优化配置模型研究[D]. 北京: 华北电力大学, 2014.
	SONG Yihang. Research on inter-regional allocation optimization model of electric power resource in China[D]. Beijing: North China Electric Power University, 2014.
[2]	陈国平, 梁志峰, 董昱. 基于能源转型的中国特色电力市场建设的分析与思考[J]. 中国电机工程学报, 2020, 40(2): 369-379.
	CHEN Guoping, LIANG Zhifeng, DONG Yu. Analysis and reflection on the marketization construction of electric power with Chinese characteristics based on energy transformation[J]. Proceedings of the CSEE, 2020, 40(2): 369-379.
[3]	2020年12月新能源省间市场化交易情况:1-12 月累计完成电量919亿千瓦时-北极星售电网[EB/OL]. ( 2021-01-26) [2022-01-03]. https://shoudian.bjx.com.cn/html/20210126/1132188.shtml.
[4]	2020年国家电网省间清洁能源交易电量累计完成4949亿千瓦时占省间交易电量的42. 7%-北极星售电网[EB/OL]. ( 2021-01-26) [2022-01-03]. https://shoudian.bjx.com.cn/html/20210126/1132285.shtml.
[5]	马莉, 范孟华, 曲昊源, 等. 中国电力市场建设路径及市场运行关键问题[J]. 中国电力, 2020, 53(12): 1-9.
	MA Li, FAN Menghua, QU Haoyuan, et al. Construction path and key operation issues of electricity market in China[J]. Electric Power, 2020, 53(12): 1-9.
[6]	曾丹, 谢开, 庞博, 等. 中国特色、全国统一的电力市场关键问题研究(3):省间省内电力市场协调运行的交易出清模型[J]. 电网技术, 2020, 44(8): 2809-2819.
	ZENG Dan, XIE Kai, PANG Bo, et al. Key issues of national unified electricity market with Chinese characteristics(3): Transaction clearing models and algorithms adapting to the coordinated operation of provincial electricity markets[J]. Power System Technology, 2020, 44(8): 2809-2819.
[7]	郭立邦, 丁一, 包铭磊, 等. 两级电力市场环境下计及风险的省间交易商最优购电模型[J]. 电网技术, 2019, 43(8): 2726-2734.
	GUO Libang, DING Yi, BAO Minglei, et al. An optimal power purchase model of inter-provincial traders in two-level electricity market considering risk management[J]. Power System Technology, 2019, 43(8): 2726-2734.
[8]	国家电网有限公司. 全国统一电力市场深化设计方案[Z]. 北京: 国家电网有限公司, 2018.
[9]	胡超凡, 王扬, 赵天阳, 等. 省间日内现货市场设计的挑战与思考[J]. 电网技术, 2020, 44(2): 573-579.
	HU Chaofan, WANG Yang, ZHAO Tianyang, et al. Challenges and strategies of cross-provincial intraday market design[J]. Power System Technology, 2020, 44(2): 573-579.
[10]	DOQUET M. Zonal reduction of large power systems: Assessment of an optimal grid model accounting for loop flows[J]. IEEE Transactions on Power Systems, 2015, 30(1): 503-512.
[11]	TAN Z F, ZHONG H W, WANG J X, et al. Enforcing intra-regional constraints in Tie-line scheduling: A projection-based framework[J]. IEEE Transactions on Power Systems, 2019, 34(6): 4751-4761.
[12]	LIN W, YANG Z F, YU J, et al. Determination of transfer capacity region of Tie lines in electricity markets: Theory and analysis[J]. Applied Energy, 2019, 239: 1441-1458.
[13]	张林, 杨高峰, 汪洋, 等. 基于多参数规划理论的互联电网直流联络线功率可行域确定方法[J]. 中国电机工程学报, 2019, 39(19): 5763-5771.
	ZHANG Lin, YANG Gaofeng, WANG Yang, et al. Determination of the DC Tie-line transfer capacity region of the interconnected power grid: A multi-parametric programming approach[J]. Proceedings of the CSEE, 2019, 39(19): 5763-5771.
[14]	LIU S, YANG Z F, XIA Q, et al. Power trading region considering long-term contract for interconnected power networks[J]. Applied Energy, 2020, 261: 114411.
[15]	LIN W, YANG Z F, YU J, et al. Tie-line power transmission region in a hybrid grid: Fast characterization and expansion strategy[J]. IEEE Transactions on Power Systems, 2020, 35(3): 2222-2231.
[16]	林伟, 杨知方, 余娟, 等. 考虑机组启停的省间电量交易可行域确定方法[J]. 中国电机工程学报, 2021, 41(15): 5119-5128.
	LIN Wei, YANG Zhifang, YU Juan, et al. Determination on energy trading region among regional networks considering unit commitment[J]. Proceedings of the CSEE, 2021, 41(15): 5119-5128.
[17]	KIM B H, BALDICK R. A comparison of distributed optimal power flow algorithms[J]. IEEE Transactions on Power Systems, 2000, 15(2): 599-604.
[18]	AGUADO J A, QUINTANA V H. Inter-utilities power-exchange coordination: A market-oriented approach[J]. IEEE Transactions on Power Systems, 2001, 16(3): 513-519.
[19]	KIM B H, BALDICK R. Coarse-grained distributed optimal power flow[J]. IEEE Transactions on Power Systems, 1997, 12(2): 932-939.
[20]	KARGARIAN A, FU Y, LI Z Y. Distributed security-constrained unit commitment for large-scale power systems[J]. IEEE Transactions on Power Systems, 2015, 30(4): 1925-1936.
[21]	ERSEGHE T. Distributed optimal power flow using ADMM[J]. IEEE Transactions on Power Systems, 2014, 29(5): 2370-2380.
[22]	李佩杰, 陆镛, 白晓清, 等. 基于交替方向乘子法的动态经济调度分散式优化[J]. 中国电机工程学报, 2015, 35(10): 2428-2435.
	LI Peijie, LU Yong, BAI Xiaoqing, et al. Decentralized optimization for dynamic economic dispatch based on alternating direction method of multipliers[J]. Proceedings of the CSEE, 2015, 35(10): 2428-2435.
[23]	曾方迪, 李更丰, 别朝红, 等. 考虑跨区联络线交易计划的多区域互联系统分散调度方法[J]. 电力系统自动化, 2018, 42(16): 32-40.
	ZENG Fangdi, LI Gengfeng, BIE Zhaohong, et al. Decentralized dispatch method for multi-area interconnected power systems considering cross-area Tie-line transaction strategy[J]. Automation of Electric Power Systems, 2018, 42(16): 32-40.
[24]	赵文猛, 刘明波. 多区域电力系统分散式动态经济调度的割平面一致性算法[J]. 中国电机工程学报, 2016, 36(21): 5806-5815.
	ZHAO Wenmeng, LIU Mingbo. Cutting plane consensus algorithm for decentralized dynamic economic dispatch in multi-area power systems[J]. Proceedings of the CSEE, 2016, 36(21): 5806-5815.
[25]	ZHAO F, LITVINOV E, ZHENG T X. A marginal equivalent decomposition method and its application to multi-area optimal power flow problems[J]. IEEE Transactions on Power Systems, 2014, 29(1): 53-61.
[26]	BISKAS P N, BAKIRTZIS A G, MACHERAS N I, et al. A decentralized implementation of DC optimal power flow on a network of computers[J]. IEEE Transactions on Power Systems, 2005, 20(1): 25-33.
[27]	南方能源监管局, 广东省经济和信息化委, 广东省发展改革委. 关于征求南方(以广东起步)电力现货市场系列规则意见的通知[EB/OL]. ( 2018-08-31) [2022-01-03]. http://nfj.nea.gov.cn/adminContent/initViewContent.do?pk=402881e56579be6301658d99ac57001f.
[28]	刘畅, 冯冬涵, 方陈. 实时市场中电价多解情况下的一种定价新方法[J]. 中国电机工程学报, 2020, 40(2): 390-400.
	LIU Chang, FENG Donghan, FANG Chen. A new pricing method for price multiplicity in real-time market[J]. Proceedings of the CSEE, 2020, 40(2): 390-400.