CN-121981762-A - Power grid power transmission and distribution price pricing method suitable for producers and consumers

CN121981762ACN 121981762 ACN121981762 ACN 121981762ACN-121981762-A

Abstract

The application belongs to the technical field of power transmission and distribution prices of power systems, and relates to a power transmission and distribution price pricing method of a power grid, which is suitable for producers and consumers. The method comprises the steps of dividing a power grid user into a producer user and a consumer user and a general user, acquiring the exclusive access facility cost of the producer user and the consumer user based on a shallow cost recovery principle, determining access fees, acquiring the permitted income of a public network of the power grid, constructing a public network use fee pricing model based on the association relation between the load rate and the synchronous rate, and determining the power transmission and distribution price born by the producer user based on the access fees and the public network use fee pricing model. The method solves the problems of poor applicability and serious cross patch of the traditional power transmission and distribution price caused by the characteristics of 'high capacity and low load rate' of producers and consumers by constructing a pricing mechanism of 'access fee + selectable load rate public network use fee', and realizes accurate allocation and recovery of cost.

Inventors

LIU XIAOXUE
HU YANGCHUN
ZHANG CHUNLIN
CHEN PENGFEI
CUI ZHENGPAI
YAO DONG
MA JING
PAN JUNJIE
CAO ZHENG
LIU JUNFENG
HOU WEI
LIU NAN

Assignees

国网冀北电力有限公司
长沙理工大学

Dates

Publication Date: 20260505
Application Date: 20251212

Claims (5)

1. The utility model provides a power transmission and distribution price pricing method suitable for produce the person of disappears which characterized in that includes the following steps: Dividing the power grid users into producer and consumer users and general users, wherein the cost of the producer and consumer users is composed of the cost of exclusive access facilities and the use cost of a public network; the calculation formula of the access facility cost, namely the access fee is as follows: Wherein D is the access capacity of the producer and the consumer, A is annual annuity; The public network cost is shared by the consumer users and the general users, and the sharing proportion is determined according to peak load responsibility of the users.
2. A method for pricing power transmission and distribution prices of power grids applicable to producers and consumers according to claim 1, wherein the access fees are calculated as follows: The access fee recovers only the direct investment and operation maintenance costs of the dedicated facilities upstream of the producer-consumer access point, and the permissible revenues consist of permissible costs, permissible revenues and tax, whereby the permissible revenues are calculated as follows: R=NAV n ×WACC+GAV n ×D n +C+T Wherein R is the allowable income, NAV n is the net value of the effective asset, WACC is the weighted average capital cost, which means the total cost of the capital calculated by the enterprises by weighted average of the capital costs of various long-term funds with the weight of all the capital of the enterprises as the weight, GAV n is the original value of the asset, D n is the depreciation rate, C is the operation maintenance fee, and T is the tax; WACC=(R e ×W e )+{R d ×(1-t)×W d } wherein t is the tax rate obtained, and W e and W d are the ratio of equity and owed capital to total capital, respectively; the measurement of the equity return on investment rate Re depends on a capital asset pricing model CAPM model, and the calculation process of the capital asset pricing model for equity cost is as follows: R e ＝r f +β×[R m -r f ] Wherein rf is risk-free interest rate, beta is risk coefficient, rm is expected return rate of market, and beta× [ Rm-rf ] is risk premium; The method can be calculated according to a historical profit method: Wherein D 1 represents the expected stock information in the next period, P 0 is the current stock price, and g is the expected long-term growth rate of the stock information; the actual interest rate method calculates the cost of liabilities as follows: R d ＝r d ×(1-T c ) wherein T c is the tax rate obtained; wherein n is the depreciation age of the transformer substation.
3. A method for pricing power grid transmission and distribution prices applicable to consumers as recited in claim 1, wherein the determining of the apportionment ratio includes: obtaining the permitted income of a public network of a power grid, and constructing a public network use fee pricing model based on the association relation between the load rate and the synchronous rate; and determining the electricity transmission and distribution price born by the producer and the consumer based on the access fee and the public network use fee pricing model.
4. A method for pricing power transmission and distribution rates of a power grid applicable to producers and consumers as recited in claim 3, wherein the constructing a public network usage fee pricing model based on the association of load rates and time rates includes: load rate data and synchronous rate data of various users are obtained; Constructing an experience Bary curve relation of the load rate and the synchronous rate based on the load rate data and the synchronous rate data; determining the contribution degree of users with different load rates to the peak load of the system based on the experience curve relation; and based on the contribution degree, sharing the public network permitted income to users with different load rates to form differentiated public network use fee packages.
5. The method for pricing power transmission and distribution prices of power grids suitable for producers and consumers according to claim 4, wherein the method is specifically calculated as follows: step 1, constructing a load rate-synchronous rate relation Bary curve, wherein the load rate LF of a user reflects the electric wave activity, and the synchronous rate CF reflects the overlapping degree of a user peak value and a system peak value; Step 2, on the basis of the known Bary curve, finding a corresponding point A according to the load factor LF i of the user, making a tangential line of a Bary curve through the point A, wherein an intersection point b i of the tangential line and a synchronous rate ordinate is a proportionality coefficient of the capacity cost in the capacity electric charge; The functional expression of Bary curve is: CF=1-e α·LF The tangential slope of the Bary curve is: Knowing the coordinates of point a and the slope of the tangent, the tangent equation can be found: let x=0, find the intercept of the tangent on the vertical axis as: b i is the allocation coefficient of the i-th type load rate user; the allowable income of the voltage class allocation is R, the sum of rated capacity or maximum demand of the i-th class load factor user is P i , the sum of electric quantity is Q i , and the capacity electricity price of the i-th class load factor user is: the electricity quantity and price are as follows:

Description

Power grid power transmission and distribution price pricing method suitable for producers and consumers Technical Field The invention belongs to the technical field of power transmission and distribution prices of power systems, and relates to a power transmission and distribution price pricing method of a power grid, which is suitable for producers and consumers. Background With the construction of a novel power system, a large number of 'producers and consumers' represented by integration of distributed photovoltaic and source network charge storage occur. The users have the dual properties of power generation and power utilization, and have the remarkable characteristics of large capacity and low load rate. The current provincial power grid power transmission and distribution prices are mainly classified according to voltage levels, exclusive connection facilities and public network assets are not fully distinguished, and load factor factors are not considered or only average load factors are taken as the basis. In this context, producers self-use at ordinary times, rely on grid balance only for a short time, resulting in their net load to the grid exhibiting a "duck curve" characteristic. If the current electricity price is directly adopted, on one hand, the producer and the consumer can avoid the capacity cost born by the producer and the consumer due to low electricity consumption to cause cross subsidy to other users, and on the other hand, the exclusive access engineering of the power grid enterprise for investment of the producer and the consumer is not fair to common users if the exclusive access engineering is incorporated into the whole network for sharing. Therefore, how to design a pricing method which can accurately recover the exclusive access cost and reasonably reflect the responsibility of producers and consumers to public network peak load is a technical problem to be solved. Disclosure of Invention In order to solve the technical problems, the invention provides a power transmission and distribution price pricing method applicable to producers and consumers. The pricing problem of the producer and the consumer is effectively solved through a combined pricing mechanism of 'access fee + selectable load rate public network use fee'. The invention adopts the technical scheme that the power transmission and distribution price pricing method suitable for producers and consumers comprises the following steps: Dividing the power grid users into producer and consumer users and general users, wherein the cost of the producer and consumer users is composed of the cost of exclusive access facilities and the use cost of a public network; the calculation formula of the access facility cost, namely the access fee is as follows: Wherein D is the access capacity of the producer and the consumer, A is annual annuity; The public network cost is shared by the consumer users and the general users, and the sharing proportion is determined according to peak load responsibility of the users. Further, the access fee is specifically calculated as follows: The access fee recovers only the direct investment and operation maintenance costs of the dedicated facilities upstream of the producer-consumer access point, and the permissible revenues consist of permissible costs, permissible revenues and tax, whereby the permissible revenues are calculated as follows: R=NAVn×WACC+GAVn×Dn+C+T Where R is the allowable income, NAV n is the net effective asset value, WACC is the weighted average capital cost, which refers to the total cost of capital calculated by the enterprise for the weighted average of the capital costs of various long-term funds with the weight of the total capital of the enterprise as the weight, GAV n is the original asset value, and D n is The depreciation rate, C is the operation maintenance fee, and T is tax; WACC=(Re×We)+{Rd×(1-t)×Wd} wherein t is the tax rate obtained, and W e and W d are the ratio of equity and owed capital to total capital, respectively; The measurement of equity return on investment (Re) relies on a capital asset pricing model (CAPM model) that calculates equity costs as follows: Re＝rf+β×[Rm-rf] Wherein rf is risk-free interest rate, beta is risk coefficient, rm is market expected return rate, and beta is [ Rm-rf ] Is a risk premium; The method can be calculated according to a historical profit method: Wherein D 1 represents the expected stock information in the next period, P 0 is the current stock price, and g is the expected long-term growth rate of the stock information; the actual interest rate method calculates the cost of liabilities as follows: Rd＝rd×(1-Tc) wherein T c is the tax rate obtained; wherein n is the depreciation age of the transformer substation. Further, the determining of the apportionment ratio includes: obtaining the permitted income of a public network of a power grid, and constructing a public network use fee pricing model based on the association rela