Secondary Clearing Rules and Price Determination in Direct Electricity Trading with Renewable Energy Consumption

doi:10.12204/j.issn.1000-7229.2020.10.004

Abstract

Abstract:

To promote the accommodation of renewable energy, when renewable energy power generation enterprises participate in the direct purchase of Shanghai power market, all their power needs to be purchased. To satisfy this policy, some provinces use a trading mechanism called secondary clearing, which lacks of relevant research. Therefore, it is necessary to study the transaction process and pricing method of this mechanism. According to the power market model of bilateral bidding and marginal clearing price, this paper establishes a mathematical model of power market which combines matching clearing and secondary clearing, puts forward three principles that pricing of secondary clearing should conform to, and analyses the problems existing in marginal price. A new pricing method is put forward by illustrating with an example.

Key words: power market, direct power purchase, secondary clearing, optimization

CLC Number:

TM71

ZENG Jiani, LIN Xiaofan, ZHONG Hua, LIU Chang, FENG Donghan, ZHOU Yun, CHEN Chunyi. Secondary Clearing Rules and Price Determination in Direct Electricity Trading with Renewable Energy Consumption[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(10): 30-37.

Figures/Tables 15

Fig.1 Price of single process with out-of-town power generation enterprise matching cleared

Fig.2 Price of single process with out-of-town power generation enterprise secondary cleared

Fig.3 Marginal price of two stages

Fig.4 Marginal price of matching clearing

Table 1 Evaluation of marginal pricing methods

Fig.5 A situation with marginal price of matching clearing

Fig.6 New pricing method for secondary clearing

Fig.7 Clearing process of the example

Table 2 Information of generators

Table 3 Information of buyers

Table 4 Matching clearing

Table 5 Secondary clearing

Table 6 Secondary clearing price of each method

Fig.8 Secondary clearing process and pricing

Fig.9 Response of secondary clearing price to bidding price of generator 1

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