上游充通大警 1896 1920 1987 2006 SHANGHAI ILAO TONG UNIVERSITY G Chapter 3 NE The structure and operation of the energy market G SW G 2016.1 G. TGG G SE G
1896 1920 1987 2006 Chapter 3 The structure and operation of the energy market 2016.11 1
上游充廷大￥ 3.2 Uniform-Pricing model SHANGHAI IIAO TONG UNIVERSITY In the traditional power industry,dispatching center runs the economical dispatch on the basis of the unit cost curve or security constraints. © In the electricity market,dispatching center runs the economical dispatch on the basis of the unit bid curve or security constraints. If the generator and the load has a bilateral deal,it can bid at zero to ensure the fulfillment of the contract. 2016/12/22
In the traditional power industry, dispatching center runs the economical dispatch on the basis of the unit cost curve or security constraints. In the electricity market, dispatching center runs the economical dispatch on the basis of the unit bid curve or security constraints. If the generator and the load has a bilateral deal, it can bid at zero to ensure the fulfillment of the contract. 2016/12/22 2 3.2 Uniform-Pricing model
上泽文豆大￥ SHANGHAI JIAO TONG UNIVERSTTY Asymmetric market Symmetric market Kilowatts Kilowatts Buyers' bids Sellers' Demand Sellers'bids bids D Market price Cat底 Market price Cents per kilowelt-hour klowatt-hour ) 2) 1 The user side does not participate in the bid 2 The user side participates in the bid. 2016/12/22
2016/12/22 3 1 The user side does not participate in the bid. 2 The user side participates in the bid
上游充廷大￥ Economic dispatch SHANGHAI JIAO TONG UNIVERSITY Min p'PG PG S.T. ePG=P Pc≤Po≤PG 2016/12/22
. . G T G T G D G G G Min S T P P p P e P PPP 2016/12/22 4 Economic dispatch
上游充廷大￥ Economic dispatch SHANGHAI IIAO TONG UNIVERSITY Queuing method:let the unit offering the lowest bid price to output first. The generators located Price in the s shadow area win the bids. CP The price of the last successful bidder is the clearing price. Load W 2016/12/22
Queuing method：let the unit offering the lowest bid price to output first. 2016/12/22 5 Economic dispatch The generators located in the shadow area win the bids. The price of the last successful bidder is the clearing price
上游充廷大￥ Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 1 The dispatch problem considering the constraints of generators output. Lagrangian multiplier expression: r=pP。+2(e'P。-Pn)+∑(P-E)∑(-Pa) One of the optimality conditions can be expressed as =n+2+-无=0,6=12Na ar 2016/12/22
The dispatch problem considering the constraints of generators output. • Lagrangian multiplier expression: • One of the optimality conditions can be expressed as: 2016/12/22 6 Seeing the Uniform-Pricing model from the perspective of the generator 1 ( )( )( ) T T G G D i Gi Gi i Gi Gi i i pP eP P PP PP 0, ( 1, 2,..., ) i ii G Gi p iN P
上游充廷大￥ Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 2 If a generator is dispatched at neither its upper limit nor its lower limit,it is called the marginal unit.Suppose there is only one marginal unit,and its number is m. According to the K-K-T condition,the multiplier corresponding to unit m: tm =tm =0 ©Therefore: pm+入=0 2016/12/22
If a generator is dispatched at neither its upper limit nor its lower limit, it is called the marginal unit. Suppose there is only one marginal unit, and its number is m. According to the K-K-T condition, the multiplier corresponding to unit m: Therefore： 2016/12/22 7 Seeing the Uniform-Pricing model from the perspective of the generator 2 0 m m m p +λ=0
上游充廷大￥ Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 3 For units that have reached its upper limit: 元=0 .p+九+元=0，p,+元=-入 t>0.p<-见 2016/12/22
For units that have reached its upper limit: 2016/12/22 8 Seeing the Uniform-Pricing model from the perspective of the generator 3 0 0, 0 i i i ii i i p p p
上游充廷大￥ Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 4 For units that have reached its lower limit 元=0 ∴.p,+2-元=0，P,-元=-2 元>0. .p,>-元 2016/12/22
For units that have reached its lower limit: 2016/12/22 9 Seeing the Uniform-Pricing model from the perspective of the generator 4 0 0, 0 i i i ii i i p p p
上游充通大学 Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 5 Therefore,from the perspective of the generator,a reasonable settlement price is - Then,what the situation will be if seeing from the perspective of the load 2016/12/22
Therefore, from the perspective of the generator, a reasonable settlement price is Then, what the situation will be if seeing from the perspective of the load ？ 2016/12/22 10 Seeing the Uniform-Pricing model from the perspective of the generator 5