CN104408666A - Trans-provincial electric power trade clearing method based on corrected line loss rate - Google Patents

Abstract

The invention discloses a trans-provincial electric power trade clearing method based on corrected line loss rate. The trans-provincial electric power trade clearing method based on the corrected line loss rate includes steps that 1) clearing the trade with clearing priority; 2) for the other power transmission parties, calculating the cleared on-grid energy of each power transmission type; 3) calculating a line loss rate correction value according to the cleared on-grid energy of each power transmission party, the checked line loss rate and the actual power purchasing quantity of each power purchasing party; 4) calculating the cleared power purchasing quantity of each trade type; 5) calculating the exchange electric quantity between two power purchasing parties; 6) judging the exchange situation of the current month between the power purchasing parties; 7) calculating the cleared power purchasing quantity of the power purchasing party 1; 8) obtaining the cleared power purchasing quantity of each party sent to the power purchasing party 1. The trans-provincial electric power trade clearing method based on the corrected line loss rate is capable of effectively solving the line loss clearing abnormality and providing clearing basis for different types of trans-provincial electric power trade. The trans-provincial electric power trade clearing method based on the corrected line loss rate is convenient to perform and practical.

Description

A kind of power trade settlement method of district transprovincially based on modified line loss rate

Technical field

The invention belongs to Power System Analysis field, particularly one is used for determining that various types of districts transprovincially power trade settles accounts electric method for determination of amount, belongs to the innovative technology of district's power trade settlement method transprovincially.

Background technology

Transprovincially district's power trade has played vital role for promoting different regions coordination, sustainable development and optimizing allocation of resources, and also brings significant economic benefit and social benefit for networking economizes (district).Along with transaction size constantly increases, kind and the quantity of transaction agent progressively increase, trade mode is tending towards complicated, there is the problems such as existing line loss is abnormal in the more original transaction of district transprovincially electricity clearing partitioning algorithm in practical operation, the needs of power trade development under the new situation can not be adapted to, easily there is dispute or problem when electricity price inspection, power monitoring, therefore need badly and study and define a set of fair and reasonable, settlement method of meeting following district's power trade development need transprovincially.

Summary of the invention

The object of the invention is to consider the problems referred to above and a kind of power trade settlement method of district transprovincially based on modified line loss rate is provided.The present invention effectively can solve in current balance method the situation that negative wire is damaged that may occur, for the complex transaction trend that may occur future provides can the settlement method of reference.

Technical scheme of the present invention is: the power trade settlement method of district transprovincially that the present invention is based on modified line loss rate, comprises the steps:

1) transaction of the preferential clearing of first clearing, power transmission side 1 needs preferentially to settle accounts to k, and its online side clearing electricity equals plan power transmission electricity, and calculates it and land side according to appraising and deciding line loss per unit and settle accounts electricity;

2) to other power transmission side, power purchase side 1, the online side Transaction algorithm of power purchase side 2 and actual online voltameter is sent to calculate the clearing electricity volume of each power transmission type according to it;

3) clearing of preferential settlement bargain landed electricity from after actual critical point, power purchase side electricity deduction, calculate electricity volume according to each power transmission reef knot, appraise and decide the actual electricity that lands of line loss per unit and power purchase side and calculate line loss per unit modified value;

4) calculate electricity volume according to each power transmission reef knot, appraise and decide line loss per unit and line loss per unit modified value, electricity is landed in the clearing calculating each type of transaction;

5) land electricity according to the actual clearing of landing electricity and each type of transaction of power purchase side 1, power purchase side 2 and calculate the mutual power transmission amount of two power purchase sides;

6) judge the condition of giving a present mutually between of that month power purchase side, if send power purchase side 2 for power purchase side 1, line loss per unit is zero, load actual conditions, otherwise need to power purchase side 1 land clearing electricity carry out secondary adjustment;

7) determine that power purchase side 2 send power purchase side 1 end clearing electricity of surfing the Net to be step 5) in the mutual power transmission amount of two power purchase sides calculated, then by the actual line loss rate on of that month two power purchase side's interconnections, calculate the clearing of side, power purchase side 1 and land electricity;

8) that power purchase side 2 is sent power purchase side 1 lands that clearing electricity is actual from power purchase side 1 to land electricity after deduction, proportionally carried out sharing of deviation electricity to the power transmission side that remaining non-preferential is settled accounts, finally obtains each side and send the clearing of power purchase side 1 to land electricity.

Above-mentioned steps 1) in, the transaction of the preferential clearing of first clearing, power transmission side 1 needs preferentially to settle accounts to k, and its online side clearing electricity equals plan power transmission electricity, and calculates it and land side according to appraising and deciding line loss per unit and settle accounts electricity:

$\stackrel{\‾}{P_{\mathrm{lm}}}=P_{\mathrm{lm}},(l=\mathrm{1,2}...,k;m=\mathrm{1,2})---\left(1\right)$

$\stackrel{\‾}{Q_{\mathrm{lm}}}=\stackrel{\‾}{P_{\mathrm{lm}}}\×(1-K_{\mathrm{lm}}),(l=\mathrm{1,2}...,k;m=\mathrm{1,2})---\left(2\right)$

Wherein, P _lmthe plan electricity volume that the preferential power transmission side l settled accounts send power purchase side m, the clearing electricity volume that power transmission side l send power purchase side m, that power transmission side l send the clearing of power purchase side m to land electricity, K _lmthat power transmission side l send that power purchase side m's appraise and decide line loss per unit.

Above-mentioned steps 2) in, the online side clearing electricity computing method of other power transmission sides are:

A q power transmission side send the clearing electricity volume of power purchase side 1 to be:

$\stackrel{\‾}{P_{q1}}=P_q\×\frac{P_{q1j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(3\right)$

The clearing electricity volume of power purchase side 2 is sent to be:

$\stackrel{\‾}{P_{q2}}=P_q\×\frac{P_{q2j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(4\right)$

Wherein, k+1 to n is the power transmission side participating in district's power trade transprovincially except preferential clearing, P _qbe the actual electricity volume of a q power transmission side, P _q1jbe the plan electricity volume that q power transmission side sent power purchase side 1 this month, when its do not exist send power purchase side 1 to conclude the business time, P _q1j=0, P _q2jbe the plan electricity volume that q power transmission side sent power purchase side 2 this month, when its do not exist send power purchase side 2 to conclude the business time, P _q2j=0.

Above-mentioned steps 3) in, the clearing of preferential settlement bargain are landed electricity from after actual critical point, power purchase side electricity deduction, calculate electricity volume according to each power transmission reef knot, appraise and decide line loss per unit and power purchase side actually land the method that electricity calculates line loss per unit modified value K and be:

Build electric quantity balancing equation---

$\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×(1-K\×K_{q1})+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}\×(1-K\×K_{q2})=Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}}---\left(5\right)$

Wherein, K _q1be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 1, K _q2be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 2, Q ₁for the total electricity in critical point lands in power purchase side 1, Q ₂for the total electricity in critical point lands in power purchase side 2, can calculate line loss per unit modified value K by electric quantity balancing equation is:

$K=\frac{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}-(Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{1=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}})}{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}}---\left(6\right).$

Above-mentioned steps 4) in, the computing method that each power transmission side send power purchase side 1, electricity is landed in the clearing of power purchase side 2 are:

A q power transmission side send the clearing of power purchase side 1 to land electricity:

$\stackrel{\‾}{Q_{q1}}=\stackrel{\‾}{P_{q1}}\×(1-K_{q1}\×K),(q=k+1,k+2...,n)---\left(7\right)$

A q power transmission side send the clearing of power purchase side 2 to land electricity:

$\stackrel{\‾}{Q_{q2}}=\stackrel{\‾}{P_{q2}}\×(1-K_{q2}\×K),(q=k+1,k+2...,n)---\left(8\right).$

Above-mentioned steps 5) in, between two power purchase sides, the computing method of mutual power transmission amount are:

Power purchase side 1 side electricity is $\stackrel{\‾}{Q_1}=Q_1-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i1}}---\left(9\right)$

Power purchase side 2 side electricity is $\stackrel{\‾}{Q_2}=Q_2-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i2}}---\left(10\right)$

According to above computation process, meet

Above-mentioned steps 6) in, judgement two power purchase sides are also needed to deliver easy actual conditions mutually, if power purchase side 1 to power purchase side 2 power transmissions, line loss is zero, checkout result tallies with the actual situation, if power purchase side 2 does not have trading program between power purchase side 1 power transmission or two power purchase sides, then need that electricity lands to the clearing of side, power purchase side 1 and carry out secondary adjustment.

Above-mentioned steps 7) in, by step 5) checkout result and of that month two power purchase side's interconnections on actual line loss rate calculate the clearing electricity of two sides' transaction:

Power purchase side 2 send power purchase side 1 to surf the Net and holds clearing electricity

Power purchase side 2 send power purchase side 1 to land and holds clearing electricity

Wherein, K is the actual line loss rate on the interconnection of of that month Guangdong and Guangxi Provinces.

Above-mentioned steps 8) in, adopt the method for pro rata distribution deviation electricity, the power transmission side being adjusted rear each non-preferential clearing send the clearing of power purchase side 1 to land electricity:

$Q_{q1}^{\′}=\stackrel{\‾}{Q_{q1}}+(Q_1-Q_1^{\′}-\stackrel{\‾}{Q})\×T_q,(q=k+1,k+2,...,n)---\left(11\right)$

Wherein, each side's (comprise preferential clearing power transmission side) for first time clearing send the clearing of power purchase side 1 to land electricity sum, T _qthe power transmission side settled accounts for each non-preferential send power purchase side 1 to land electricity and accounts for and always land the ratio of electricity,

The power trade settlement method of district transprovincially that the present invention is based on modified line loss rate can solve the problem of clearing line loss exception, effectively for various types of districts transprovincially power trade provides clearing foundation.The present invention is a kind of convenient and practical power trade settlement method of district transprovincially.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the power trade settlement method of district transprovincially that the present invention is based on modified line loss rate.

Fig. 2 is the application model of the power trade settlement method of district transprovincially that the present invention is based on modified line loss rate.

Embodiment

Embodiment:

The present invention is based on the schematic diagram of the power trade settlement method of district transprovincially of modified line loss rate as shown in Figure 1, as shown in Figure 2, district transprovincially of the present invention power trade settles accounts electric method for determination of amount to application model, includes following steps:

1) transaction of the preferential clearing of first clearing, power transmission side 1 needs preferentially to settle accounts to k, and its online side clearing electricity equals plan power transmission electricity, and calculates it and land side according to appraising and deciding line loss per unit and settle accounts electricity:

$\stackrel{\‾}{P_{\mathrm{lm}}}=P_{\mathrm{lm}},(l=\mathrm{1,2}...,k;m=\mathrm{1,2})---\left(1\right)$

$\stackrel{\‾}{Q_{\mathrm{lm}}}=\stackrel{\‾}{P_{\mathrm{lm}}}\×(1-K_{\mathrm{lm}}),(l=\mathrm{1,2}...,k;m=\mathrm{1,2})---\left(2\right)$

Wherein, P _lmthe plan electricity volume that the preferential power transmission side l settled accounts send power purchase side m, the clearing electricity volume that power transmission side l send power purchase side m, that power transmission side l send the clearing of power purchase side m to land electricity, K _lmthat power transmission side l send that power purchase side m's appraise and decide line loss per unit.

2) the online side clearing electricity of other power transmission sides is calculated

A q power transmission side send the clearing electricity volume of power purchase side 1 to be:

$\stackrel{\‾}{P_{q1}}=P_q\×\frac{P_{q1j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(3\right)$

The clearing electricity volume of power purchase side 2 is sent to be:

$\stackrel{\‾}{P_{q2}}=P_q\×\frac{P_{q2j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(4\right)$

Wherein, k+1 to n is the power transmission side participating in district's power trade transprovincially except preferential clearing, P _qbe the actual electricity volume of a q power transmission side, P _q1jbe the plan electricity volume that q power transmission side sent power purchase side 1 this month, when its do not exist send power purchase side 1 to conclude the business time, P _q1j=0, P _q2jbe the plan electricity volume that q power transmission side sent power purchase side 2 this month, when its do not exist send power purchase side 2 to conclude the business time, P _q2j=0.

3) calculate electricity volume according to each power transmission reef knot, appraise and decide the actual electricity calculating line loss per unit modified value K that lands of line loss per unit and power purchase side.

Build electric quantity balancing equation---

$\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×(1-K\×K_{q1})+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}\×(1-K\×K_{q2})=Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}}---\left(5\right)$

Wherein, K _q1be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 1, K _q2be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 2, Q ₁for the total electricity in critical point lands in power purchase side 1, Q ₂for the total electricity in critical point lands in power purchase side 2, can calculate line loss per unit modified value K by electric quantity balancing equation is:

$K=\frac{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}-(Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{1=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}})}{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}}---\left(6\right)$

4) computing method that each power transmission side (non-preferential clearing) send power purchase side 1, electricity is landed in the clearing of power purchase side 2.

A q power transmission side send the clearing of power purchase side 1 to land electricity:

$\stackrel{\‾}{Q_{q1}}=\stackrel{\‾}{P_{q1}}\×(1-K_{q1}\×K),(q=k+1,k+2...,n)---\left(7\right)$

A q power transmission side send the clearing of power purchase side 2 to land electricity:

$\stackrel{\‾}{Q_{q2}}=\stackrel{\‾}{P_{q2}}\×(1-K_{q2}\×K),(q=k+1,k+2...,n)---\left(8\right)$

5) two mutual power transmission amounts in power purchase side are calculated

Power purchase side 1 side electricity is $\stackrel{\‾}{Q_1}=Q_1-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i1}}---\left(9\right)$

Power purchase side 2 side electricity is $\stackrel{\‾}{Q_2}=Q_2-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i2}}---\left(10\right)$

According to above computation process, meet

6) judge that two power purchase sides deliver easy actual conditions mutually, if power purchase side 1 to power purchase side 2 power transmissions, line loss is zero, checkout result tallies with the actual situation, if power purchase side 2 does not have trading program between power purchase side 1 power transmission or two power purchase sides, then need that electricity lands to the clearing of side, power purchase side 1 and carry out secondary adjustment.

7) by step 5) checkout result and of that month two power purchase side's interconnections on actual line loss rate calculate the clearing electricity of two sides' transaction:

Power purchase side 2 send power purchase side 1 to surf the Net and holds clearing electricity

Power purchase side 2 send power purchase side 1 to land and holds clearing electricity

Wherein, K is the actual line loss rate on the interconnection of of that month Guangdong and Guangxi Provinces.

8) power purchase side 1 land clearing electricity secondary adjustment

Adopt the method for pro rata distribution deviation electricity, the power transmission side being adjusted rear each non-preferential clearing send the clearing of power purchase side 1 to land electricity:

$Q_{q1}^{\′}=\stackrel{\‾}{Q_{q1}}+(Q_1-Q_1^{\′}-\stackrel{\‾}{Q})\×T_q,(q=k+1,k+2,...,n)---\left(11\right)$

Wherein, each side's (comprise preferential clearing power transmission side) for first time clearing send the clearing of power purchase side 1 to land electricity sum, T _qthe power transmission side settled accounts for each non-preferential send power purchase side 1 to land electricity and accounts for and always land the ratio of electricity,

Claims (9)

1., based on the power trade settlement method of district transprovincially of modified line loss rate, it is characterized in that including following steps:

1) transaction of the preferential clearing of first clearing, power transmission side 1 needs preferentially to settle accounts to k, and its online side clearing electricity equals plan power transmission electricity, and calculates it and land side according to appraising and deciding line loss per unit and settle accounts electricity;

2) to other power transmission side, power purchase side 1, the online side Transaction algorithm of power purchase side 2 and actual online voltameter is sent to calculate the clearing electricity volume of each power transmission type according to it;

3) clearing of preferential settlement bargain landed electricity from after actual critical point, power purchase side electricity deduction, calculate electricity volume according to each power transmission reef knot, appraise and decide the actual electricity that lands of line loss per unit and power purchase side and calculate line loss per unit modified value;

4) calculate electricity volume according to each power transmission reef knot, appraise and decide line loss per unit and line loss per unit modified value, electricity is landed in the clearing calculating each type of transaction;

5) land electricity according to the actual clearing of landing electricity and each type of transaction of power purchase side 1, power purchase side 2 and calculate the mutual power transmission amount of two power purchase sides;

6) judge the condition of giving a present mutually between of that month power purchase side, if send power purchase side 2 for power purchase side 1, line loss per unit is zero, load actual conditions, otherwise need to power purchase side 1 land clearing electricity carry out secondary adjustment;

7) determine that power purchase side 2 send power purchase side 1 end clearing electricity of surfing the Net to be step 5) in the mutual power transmission amount of two power purchase sides calculated, then by the actual line loss rate on of that month two power purchase side's interconnections, calculate the clearing of side, power purchase side 1 and land electricity;

8) that power purchase side 2 is sent power purchase side 1 lands that clearing electricity is actual from power purchase side 1 to land electricity after deduction, proportionally carried out sharing of deviation electricity to the power transmission side that remaining non-preferential is settled accounts, finally obtains each side and send the clearing of power purchase side 1 to land electricity.

2. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, it is characterized in that above-mentioned steps 1) in, the transaction of the preferential clearing of first clearing, power transmission side 1 needs preferentially to settle accounts to k, its online side clearing electricity equals plan power transmission electricity, and calculates it land side clearing electricity according to appraising and deciding line loss per unit:

$\stackrel{\‾}{P_{\mathrm{lm}}}=P_{\mathrm{lm}},(l=1,2...,k;m=\mathrm{1,2})---\left(1\right)$

$\stackrel{\‾}{Q_{\mathrm{lm}}}=\stackrel{\‾}{P_{\mathrm{lm}}}\×(1-K_{\mathrm{lm}}),(l=\mathrm{1,2}...,k;m=\mathrm{1,2})---\left(2\right)$

Wherein, P _lmthe plan electricity volume that the preferential power transmission side l settled accounts send power purchase side m, the clearing electricity volume that power transmission side l send power purchase side m, that power transmission side l send the clearing of power purchase side m to land electricity, K _lmthat power transmission side l send that power purchase side m's appraise and decide line loss per unit.

3. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, is characterized in that above-mentioned steps 2) in, the online side clearing electricity computing method of other power transmission sides are:

A q power transmission side send the clearing electricity volume of power purchase side 1 to be:

$\stackrel{\‾}{P_{q1}}=P_q\×\frac{P_{q1j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(3\right)$

The clearing electricity volume of power purchase side 2 is sent to be:

$\stackrel{\‾}{P_{q2}}=P_q\×\frac{P_{q2j}}{P_{q1j}+P_{q2j}},(q=k+1,k+2...,n)---\left(4\right)$

Wherein, k+1 to n is the power transmission side participating in district's power trade transprovincially except preferential clearing, P _qbe the actual electricity volume of a q power transmission side, P _q1jbe the plan electricity volume that q power transmission side sent power purchase side 1 this month, when its do not exist send power purchase side 1 to conclude the business time, P _q1j=0, P _q2jbe the plan electricity volume that q power transmission side sent power purchase side 2 this month, when its do not exist send power purchase side 2 to conclude the business time, P _q2j=0.

4. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, it is characterized in that above-mentioned steps 3) in, the clearing of preferential settlement bargain are landed electricity from after actual critical point, power purchase side electricity deduction, calculate electricity volume according to each power transmission reef knot, appraise and decide line loss per unit and power purchase side actually land the method that electricity calculates line loss per unit modified value K and be:

Build electric quantity balancing equation---

$\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×(1-K\×K_{q1})+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}\×(1-K\×K_{q2})=Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}}---\left(5\right)$

Wherein, K _q1be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 1, K _q2be the line loss per unit of appraising and deciding that a q power transmission side send power purchase side 2, Q ₁for the total electricity in critical point lands in power purchase side 1, Q ₂for the total electricity in critical point lands in power purchase side 2, can calculate line loss per unit modified value K by electric quantity balancing equation is:

$K=\frac{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q2}}-(Q_d+Q_x-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l1}}-\underset{l=1}{\overset{k}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{l2}})}{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}+\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{P_{q1}}\×K_{q1}}---\left(6\right).$

5. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, is characterized in that above-mentioned steps 4) in, the computing method that each power transmission side send power purchase side 1, electricity is landed in the clearing of power purchase side 2 are:

A q power transmission side send the clearing of power purchase side 1 to land electricity:

$\stackrel{\‾}{Q_{q1}}=\stackrel{\‾}{P_{q1}}\×(1-K_{q1}\×K),(q=k+1,k+2...,n)---\left(7\right)$

A q power transmission side send the clearing of power purchase side 2 to land electricity:

$\stackrel{\‾}{Q_{q2}}=\stackrel{\‾}{P_{q2}}\×(1-K_{q2}\×K),(q=k+1,k+2...,n)---\left(8\right).$

6. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, is characterized in that above-mentioned steps 5) in, between two power purchase sides, the computing method of mutual power transmission amount are:

Power purchase side 1 side electricity is $\stackrel{\‾}{Q_1}=Q_1-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i1}}---\left(9\right)$

Power purchase side 2 side electricity is $\stackrel{\‾}{Q_2}=Q_2-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{i2}}---\left(10\right)$

According to above computation process, meet

7. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, it is characterized in that above-mentioned steps 6) in, judgement two power purchase sides are also needed to deliver easy actual conditions mutually, if power purchase side 1 to power purchase side 2 power transmissions, line loss is zero, checkout result tallies with the actual situation, if power purchase side 2 does not have trading program between power purchase side 1 power transmission or two power purchase sides, then needs to land electricity to the clearing of side, power purchase side 1 and carries out secondary adjustment.

8. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, it is characterized in that above-mentioned steps 7) in, by step 5) checkout result and of that month two power purchase side's interconnections on actual line loss rate calculate the clearing electricity of two sides' transaction:

Power purchase side 2 send power purchase side 1 to surf the Net and holds clearing electricity

Power purchase side 2 send power purchase side 1 to land and holds clearing electricity

Wherein, K is the actual line loss rate on the interconnection of of that month Guangdong and Guangxi Provinces.

9. the power trade settlement method of district transprovincially based on modified line loss rate according to claim 1, it is characterized in that above-mentioned steps 8) in, adopt the method for pro rata distribution deviation electricity, the power transmission side being adjusted rear each non-preferential clearing send the clearing of power purchase side 1 to land electricity:

$Q_{q1}^{\′}=\stackrel{\‾}{Q_{q1}}+(Q_1-Q_1^{\′}-\stackrel{\‾}{Q})\×T_q,(q=k+1,k+2,...,n)---\left(11\right)$

Wherein, for each side of first time clearing send the clearing of power purchase side 1 to land electricity sum, T _qthe power transmission side settled accounts for each non-preferential send power purchase side 1 to land electricity and accounts for and always land the ratio of electricity, $T_q=\frac{\stackrel{\‾}{Q_{q1}}}{\underset{q=k+1}{\overset{n}{\mathrm{\Σ}}}\stackrel{\‾}{Q_{q1}}},(q=k+1,k+2,...,n).$