A three-phase unbalance responsibility division method, device, equipment and storage medium

Abstract

The present application provides a three-phase unbalance responsibility division method, device, equipment and storage medium, belonging to the technical field of three-phase unbalance responsibility division, including: taking the point of common coupling in the power distribution system as the boundary, obtaining the unbalance formulas on the grid side and the user side in a mathematical derivation manner; calculating the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power and negative sequence apparent power on the grid side and the user side according to the unbalance formulas on the grid side and the user side; calculating the unbalance economic losses on the grid side and the user side according to the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power and negative sequence apparent power; determining the unbalance responsibility for power supply and consumption according to the ratio of the unbalance economic losses on the grid side and the user side. Through the three-phase unbalance responsibility division, the present application helps to ensure the economic interests of both power supply and consumption parties.

Description

Technical Field

[0001] This application belongs to the field of three-phase unbalance responsibility division, and particularly relates to a method, device, equipment and storage medium for three-phase unbalance responsibility division. Background Art

[0002] With the rapid development of new energy and power electronics technologies, more and more asymmetric loads are connected to the power grid, making the three-phase unbalanced power quality problem in the power grid increasingly serious. At present, the analysis and treatment of the unbalance problem are mainly concerned about the three-phase unbalanced power quality problem, and the division of unbalance responsibility is not involved. Summary of the Invention

[0003] The purpose of this application is to overcome the problems existing in the above-mentioned prior art, and provide a method, device, equipment and storage medium for three-phase unbalance responsibility division.

[0004] This application provides a method for three-phase unbalance responsibility division, including:

[0005] Taking the point of common coupling in the distribution system as the boundary, obtaining the circuit expressions on the grid side and the user side through mathematical derivation, and constructing an equivalent model of the negative sequence network according to the circuit expressions;

[0006] Calculating the unbalanced apparent power of negative sequence current, the unbalanced apparent power of negative sequence voltage and the negative sequence apparent power on the grid side and the user side according to the equivalent model of the negative sequence network;

[0007] Calculating the unbalanced economic losses on the grid side and the user side according to the unbalanced apparent power of negative sequence current, the unbalanced apparent power of negative sequence voltage and the negative sequence apparent power;

[0008] Determining the unbalance responsibility of power supply and consumption according to the ratio of the unbalanced economic losses on the grid side and the user side.

[0009] Optionally, calculating the unbalanced apparent power of negative sequence current, the unbalanced apparent power of negative sequence voltage and the negative sequence apparent power on the grid side and the user side according to the equivalent model of the negative sequence network, and the expressions are as follows:

[0010] S 2I =S 1* ε 2I

[0011] S 2U =S 1 *ε 2U

[0012] S 2 =S 1 *ε 2I *ε 2U

[0013] Among them, S 2I is the unbalanced apparent power of negative-sequence current, S 2U is the unbalanced apparent power of negative-sequence voltage, S 2 is the negative-sequence apparent power, ε 2U and ε 2I are the unbalanced degrees of negative-sequence voltage and negative-sequence current respectively, and S 1 is the fundamental positive-sequence apparent power.

[0014] Optionally, calculate the unbalanced economic losses on the grid side and the user side according to the unbalanced apparent power of negative-sequence current, the unbalanced apparent power of negative-sequence voltage and the negative-sequence apparent power. The expression is:

[0015]

[0016] Among them, the ω is the economic loss weight, i is the serial number of the economic loss evaluation index, S refers to the grid side, C refers to the user side, M(x) represents the economic loss, and x is the value of the economic loss evaluation index.

[0017] Optionally, the expression of the economic loss is as follows:

[0018]

[0019] Among them, A i is the maximum economic loss, i is the serial number of the economic loss evaluation index, is the sensitivity parameter, and x is the value of the economic loss evaluation index.

[0020] Optionally, the calculation formula of the economic loss weight is as follows:

[0021]

[0022] Among them, the Z is the signal-to-noise ratio of the small-desired characteristic.

[0023] Optionally, determine the unbalanced responsibilities on both sides of the point of common coupling according to the ratio of the unbalanced economic losses on the grid side and the user side, including:

[0024] Determine the unbalanced responsibilities of the grid side and the user side according to the proportions of the unbalanced economic losses on the grid side and the user side in the total unbalanced economic loss.

[0025] Optionally, taking the point of common coupling in the distribution system as the boundary, obtain the circuit expressions of the grid side and the user side through mathematical derivation, and construct an equivalent model of the negative-sequence network according to the circuit expressions, including:

[0026]

[0027]

[0028] Among them, and are respectively the negative sequence voltage and current phasor components generated by the grid side at the point of common coupling; and are respectively the negative sequence voltage and current phasor components generated by the user side at the point of common coupling; among them, and are the negative sequence equivalent current sources of the user side and the grid side; Z C2 and Z S2 are the negative sequence reference impedances of the user side and the grid side.

[0029] This application also provides a three-phase unbalance responsibility division method device, including:

[0030] A derivation module, configured to take the point of common coupling in the distribution system as a boundary, obtain circuit expressions of the grid side and the user side through mathematical derivation, and construct a negative sequence network equivalent model according to the circuit expressions;

[0031] A balance degree module, configured to calculate the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power, and negative sequence apparent power of the grid side and the user side according to the negative sequence network equivalent model;

[0032] A loss module, configured to calculate the unbalance economic losses of the grid side and the user side according to the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power, and negative sequence apparent power;

[0033] A responsibility module, configured to determine the unbalance responsibility of power supply and consumption according to the ratio of the unbalance economic losses of the grid side and the user side.

[0034] This application also provides a three-phase unbalance responsibility division method device, including:

[0035] A memory, configured to store the computer executable program of the above three-phase unbalance responsibility division method;

[0036] A processor, configured to retrieve the computer executable program and execute: taking the point of common coupling in the distribution system as a boundary, obtaining circuit expressions of the grid side and the user side through mathematical derivation, constructing a negative sequence network equivalent model according to the circuit expressions; calculating the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power, and negative sequence apparent power of the grid side and the user side according to the negative sequence network equivalent model; calculating the unbalance economic losses of the grid side and the user side according to the negative sequence current unbalance apparent power, negative sequence voltage unbalance apparent power, and negative sequence apparent power; determining the unbalance responsibility of power supply and consumption according to the ratio of the unbalance economic losses of the grid side and the user side.

[0037] The present application also provides a storage medium, including: a computer-executable program stored thereon, and the computer-executable program is used to be retrieved and executed by a processor to perform the steps of the above three-phase unbalance liability division method.

[0038] The beneficial effects of the present application are:

[0039] The present application provides a three-phase unbalance liability division method, including: taking the common coupling point in the power distribution system as the boundary, and obtaining the unbalance formulas on the grid side and the user side in a mathematical derivation manner; calculating the negative-sequence current unbalance apparent power, negative-sequence voltage unbalance apparent power and negative-sequence apparent power on the grid side and the user side according to the unbalance formulas on the grid side and the user side; calculating the unbalance economic losses on the grid side and the user side according to the negative-sequence current unbalance apparent power, negative-sequence voltage unbalance apparent power and negative-sequence apparent power; and determining the unbalance liability of power supply and consumption according to the ratio of the unbalance economic losses on the grid side and the user side. Through the three-phase unbalance liability division, the present application helps to ensure the economic interests of both power supply and consumption parties. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of the three-phase unbalance liability division process in the present application;

[0041] Figure 2 is a schematic diagram of the basic circuit principle in the present application;

[0042] Figure 3 is a schematic diagram of the three-phase unbalance economic loss evaluation index system in the present application;

[0043] Figure 4 is a schematic diagram of the three-phase unbalance liability division device in the present application;

[0044] Figure 5 is a first schematic diagram of the unbalance liability between the grid side and the user side in the present application;

[0045] Figure 6 is a second schematic diagram of the unbalance liability between the grid side and the user side in the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The following further describes the present application with reference to the drawings and specific embodiments, so that those skilled in the art can better understand the present application and be able to implement it.

[0047] The present application provides a three-phase unbalance liability division, belonging to the field of three-phase unbalance liability division, and is used to solve the problem that it is difficult to ensure the interests of both power supply and consumption parties due to the lack of three-phase unbalance liability division at present.

[0048] Such as Figure 4As shown, in the actual scenario, the number and location of the working devices on the user side change dynamically over time. To more realistically simulate this scenario, this factor was specifically considered when constructing the simulation model, that is, during different acquisition periods, the number and location of the simulated trains will be different. Based on this, the following two cases are set:

[0049] Case 1:

[0050] Grid side conditions: Three-phase voltage balance.

[0051] User side load: Asymmetrical traction load.

[0052] Working device model: CRH2 type working device is adopted.

[0053] Traction transformer: V / x connection type.

[0054] Case 2:

[0055] Grid side conditions: Three-phase voltage unbalance, with background negative sequence.

[0056] User side load: Asymmetrical traction load.

[0057] Working device model: CRH2 type working device is adopted.

[0058] Traction transformer: V / x connection type.

[0059] The collected data is as follows:

[0060] Table 1 Voltage and current acquisition data at the PCC in Case 1

[0061]

[0062]

[0063] Table 2 Voltage and current acquisition data at the PCC in Case 2

[0064]

[0065]

[0066] As Figure 5 and Figure 6 shown, the unbalance responsibilities on the grid side and the user side were calculated using the negative sequence voltage method, the voltage unbalance degree method, and the negative sequence current method respectively.

[0067] It can be seen that when the three-phase voltage is unbalanced:

[0068] 1) When calculating the unbalance responsibility on the grid side and the user side using negative-sequence voltage and negative-sequence current indicators, there will be a situation where the unbalance responsibility is greater than 100%, which does not conform to the actual situation;

[0069] 2) The results obtained by using different indicators may be contradictory. For example, in the unbalance responsibility results calculated from the fourth measurement data, when using negative-sequence voltage and voltage unbalance degree indicators, it is determined that the grid side is the main responsible party, while when using negative-sequence current indicator, it is determined that the user side is the main responsible party.

[0070] Based on the above problems, this application proposes a three-phase unbalance responsibility division method.

[0071] Please refer to Figure 1 As shown, a three-phase unbalance responsibility division method provided by this application includes the following steps:

[0072] S101. Taking the point of common coupling in the distribution system as the boundary, obtain the circuit expressions of the grid side and the user side through mathematical derivation.

[0073] To reasonably divide the unbalance responsibility between the power supply and the power consumption in the power system, this application first determines a division method with the PCC (point of common coupling) as the boundary.

[0074] The PCC divides the power system into two parts: the grid side and the user side.

[0075] On the grid side, based on the physical characteristics and operating rules of the power system, such as Ohm's law, conduct mathematical formula derivation to quantify the impact of the grid side on the unbalanced state. Similarly, conduct mathematical formula derivation on the electrical characteristics of the user side to evaluate its responsibility for the unbalanced state.

[0076] S102. Construct an equivalent negative-sequence network model according to the circuit expression.

[0077] As Figure 2 shown, according to the basic circuit principle, the parameter expressions in the derived equivalent negative-sequence network model are as follows:

[0078]

[0079] Among them, S refers to the grid side, and C refers to the user side. And are respectively the negative-sequence voltage and current phasor components generated by the grid side at the point of common coupling; And are respectively the negative-sequence voltage and current phasor components generated by the user side at the point of common coupling; among them, And are the negative-sequence equivalent current sources of the user side and the grid side; ZC2 and Z S2 are the negative-sequence reference impedances on the user side and the grid side.

[0080] The negative-sequence network equivalent model of the three-phase unbalanced power system constructed according to the mathematical expressions derived above intuitively shows the interaction and respective responsibilities of the grid side and the user side in the unbalance problem.

[0081] S103. Calculate the negative-sequence current unbalance apparent power, negative-sequence voltage unbalance apparent power, and negative-sequence apparent power of the grid side and the user side according to the negative-sequence network equivalent model.

[0082] The negative-sequence current unbalance apparent power, negative-sequence voltage unbalance apparent power, and negative-sequence apparent power are the economic loss indicators in this application.

[0083] Specifically, according to the IEEE Std.1459-2010 power theory, the fundamental apparent power is decomposed, and its expression is as follows:

[0084]

[0085] Where:

[0086] S 1 = 3U P1 I P1 is the fundamental positive-sequence apparent power; U P1 is the positive-sequence component of the PCC point voltage; I P1 is the positive-sequence component of the PCC point current;

[0087] S 2I = 3U P1 I P2 is the negative-sequence current unbalance apparent power; I P2 is the negative-sequence component of the PCC point current;

[0088] S 2U = 3U P2 I P1 is the negative-sequence voltage unbalance apparent power; U P2 is the positive-sequence component of the PCC point voltage;

[0089] S 2 = 3U P2 I P2 is the negative-sequence apparent power;

[0090] is the zero-sequence unbalance apparent power; U P0 is the zero-sequence component of the PCC point voltage; I P0 is the zero-sequence component of the PCC point current;

[0091] is the non-fundamental positive-sequence apparent power.

[0092] In practice, when the system becomes unbalanced due to certain reasons, the degree of system imbalance is generally measured by the negative-sequence voltage and the unbalance degree of negative-sequence current.

[0093] Through the analysis of the decomposition form of the equivalent apparent power and combined with the definition formulas of the negative-sequence voltage and current unbalance degrees, it can be obtained that:

[0094] S 2I = S 1 * ε 2I

[0095] S 2U = S 1 * ε 2U

[0096] S 2 = S 1 * ε 2I * ε 2U

[0097] Among them, S 2I is the negative-sequence current unbalance apparent power, S 2U is the negative-sequence voltage unbalance apparent power, S 2 is the negative-sequence apparent power, ε 2U and ε 2I are the negative-sequence voltage and current unbalance degrees respectively, and S 1 is the fundamental positive-sequence apparent power.

[0098] This application defines the above-mentioned negative-sequence voltage unbalance degree and negative-sequence current unbalance degree as the ratio of the effective value of the negative-sequence component to the positive-sequence component. According to this definition, this application redefines the negative-sequence voltage and negative-sequence current unbalance degrees caused separately by the grid side and the user side at the PCC. The specific calculation expressions are as follows:

[0099]

[0100] Among them, ε S-2U and ε S-2I are the negative-sequence voltage and current unbalance degrees of the grid side; ε C-2U and ε C-2I are the negative-sequence voltage and current unbalance degrees of the user side.

[0101] Based on the above analysis, a three-phase unbalanced economic loss evaluation index system as shown in Figure 3 is established.

[0102] S104. Calculate the unbalanced economic losses of the grid side and the user side according to the negative-sequence current unbalance apparent power, the negative-sequence voltage unbalance apparent power, and the negative-sequence apparent power.

[0103] For the economic loss evaluation indicators of negative-sequence current unbalanced apparent power, negative-sequence voltage unbalanced apparent power, and negative-sequence apparent power, the following formula is selected to calculate the economic loss:

[0104]

[0105] where \(i = \{1, 2, \cdots, p\}\), and \(p\) is the number of economic loss evaluation indicators.

[0106] The negative-sequence (zero-sequence) components generated during the three-phase unbalance of the system will pollute the power quality. Therefore, in actual engineering, it is hoped that the target value of the three-phase unbalance quality characteristics is as small as possible. Therefore, in this application, the value of G i is taken as 0, and substituting it into the above formula gives:

[0107]

[0108] In this application, when obtaining the maximum economic loss A i caused by the quality characteristics, the governance cost is mainly considered, that is, the cost of the equipment required to address the unbalance. The selling price of the compensation equipment is usually related to the capacity. Therefore, the calculation expression of A i is:

[0109] A i = a·S i

[0110] where \(a\) is the unit selling price of the governance equipment; ten thousand yuan / kVA; S i is the capacity corresponding to the \(i\)th quality characteristic (i.e., economic loss evaluation indicator), kVA.

[0111] Sensitivity parameter The calculation formula is as follows:

[0112]

[0113] where \(M\) Li is the critical mass economic loss value (ten thousand yuan) corresponding to the quality characteristic \(x\) i , \(M\) Li = 0.1A i ; \(x\) i0 is the critical value of each quality characteristic \(x\) i .

[0114] Different quality characteristics have different impacts on the overall quality of the product, so the resulting economic losses are also different. In order to reflect the differences in the impacts of various quality characteristics on economic losses, it is necessary to clarify the weights of the economic losses corresponding to each economic indicator in the total economic loss. The expression of the weights in this application is as follows:

[0115]

[0116] Among them, Z i is the signal-to-noise ratio of the smaller-the-better characteristic.

[0117] The signal-to-noise ratio (SNR) Z can comprehensively reflect the quality stability of the product. The larger its value, the more stable the product quality and the smaller the economic loss caused.

[0118] This application uses the smaller-the-better characteristic to describe the quality economic loss caused by three-phase unbalance. The calculation formula of the signal-to-noise ratio of the smaller-the-better characteristic is as follows:

[0119]

[0120] In the formula: x im is the acquisition value, and n is the number of acquisitions.

[0121] For example, assume that the three-phase voltage and current data at the PCC are collected 4 times in a day, once in the morning, at noon, in the afternoon, and in the evening respectively, that is, n = 4. Calculate the signal-to-noise ratio Z corresponding to each quality characteristic i , and then the economic loss weight corresponding to each quality characteristic can be calculated.

[0122] Therefore, the final comprehensive economic loss is:

[0123]

[0124] S105. Determine the unbalance responsibility of power supply and consumption according to the ratio of the unbalance economic losses on the grid side and the user side.

[0125] Respectively obtain the three-phase unbalance economic losses M S (x) and M C (x) caused by the grid side and the user side respectively, that is:

[0126]

[0127] Then, the unbalance responsibilities that the grid side and the user side should bear respectively, and their responsibility quantification expressions are as follows:

[0128]

[0129]

[0130] A derivation module, configured to take the common coupling point in the distribution system as a boundary, obtain circuit expressions of the grid side and the user side through mathematical derivation, and construct a negative sequence network equivalent model according to the circuit expressions;

[0131] A balance module, configured to calculate the unbalanced apparent power of negative-sequence current, the unbalanced apparent power of negative-sequence voltage, and the negative-sequence apparent power on the grid side and the user side according to the negative-sequence network equivalent model;

[0132] A loss module, configured to calculate the unbalanced economic losses on the grid side and the user side according to the unbalanced apparent power of negative-sequence current, the unbalanced apparent power of negative-sequence voltage, and the negative-sequence apparent power;

[0133] A responsibility module, configured to determine the unbalanced responsibility for power supply and consumption according to the ratio of the unbalanced economic losses on the grid side and the user side.

[0134] This application also provides a three-phase unbalanced responsibility division method device, including:

[0135] A memory, configured to store the computer-executable program of the above three-phase unbalanced responsibility division method;

[0136] A processor, configured to retrieve the computer-executable program and execute: taking the point of common coupling in the distribution system as the boundary, obtaining the circuit expressions on the grid side and the user side through mathematical derivation, and constructing a negative-sequence network equivalent model according to the circuit expressions; calculating the unbalanced apparent power of negative-sequence current, the unbalanced apparent power of negative-sequence voltage, and the negative-sequence apparent power on the grid side and the user side according to the negative-sequence network equivalent model; calculating the unbalanced economic losses on the grid side and the user side according to the unbalanced apparent power of negative-sequence current, the unbalanced apparent power of negative-sequence voltage, and the negative-sequence apparent power; determining the unbalanced responsibility for power supply and consumption according to the ratio of the unbalanced economic losses on the grid side and the user side.

[0137] This application also provides a storage medium, including: storing a computer-executable program, which is used to be retrieved and executed by a processor to perform the steps of the above three-phase unbalanced responsibility division method.

Claims

1. A three-phase unbalanced responsibility division method, characterized in that: include: Taking the common coupling point in the distribution system as the boundary, the circuit expressions on the grid side and the user side are obtained through mathematical derivation; Constructing a negative sequence network equivalent model according to the circuit expression; Calculating the negative-sequence current unbalanced apparent power, the negative-sequence voltage unbalanced apparent power and the negative-sequence apparent power on the grid side and the user side according to the negative-sequence network equivalent model; The unbalanced economic losses on the grid side and the user side are calculated according to the negative sequence current unbalanced apparent power, the negative sequence voltage unbalanced apparent power and the negative sequence apparent power, and the expression is: Wherein, ω is the economic loss weight, i is the serial number of the economic loss assessment index, S refers to the grid side, C refers to the user side, M(x) represents the economic loss, x is the value of the economic loss assessment index, and p is the number of economic loss assessment indicators; the economic loss of a single economic loss assessment index and the economic loss weight formula are as follows: Among them, A i is the maximum economic loss, i is the serial number of the economic loss assessment index, is the sensitivity parameter, x is the value of the economic loss assessment index, and Z is the signal-to-noise ratio of the expected small characteristic; The imbalance responsibility of power supply and consumption is determined according to the ratio of the unbalanced economic losses on the grid side and the user side.

2. The three-phase unbalanced responsibility division method according to claim 1 is characterized in that: The negative sequence current unbalanced apparent power, negative sequence voltage unbalanced apparent power and negative sequence apparent power on the grid side and the user side are calculated according to the negative sequence network equivalent model, and the expressions are as follows: S 2I =S1*ε 2I S 2U =S1*ε 2U S2=S1*e 2I *e 2U Among them, S 2I is the negative sequence current unbalance apparent power, S 2U is the negative sequence voltage unbalance apparent power, S2 is the negative sequence apparent power, ε 2U , ε 2I They are the negative sequence voltage and negative sequence current imbalance respectively, and S1 is the fundamental positive sequence apparent power.

3. The three-phase unbalanced responsibility division method according to claim 1 is characterized in that: Determining the imbalance responsibility on both sides of the common coupling point according to the ratio of the imbalance economic loss on the grid side and the user side includes: The imbalance responsibilities of the grid side and the user side are determined according to the proportion of the unbalanced economic losses of the grid side and the user side to the total unbalanced economic losses.

4. The three-phase unbalanced responsibility division method according to claim 1 is characterized in that: Taking the common coupling point in the distribution system as the boundary, the circuit expressions on the grid side and the user side are obtained through mathematical derivation, and a negative sequence network equivalent model is constructed according to the circuit expressions, including: in, and are the negative sequence voltage and current phasor components generated at the common coupling point on the grid side respectively; and are the negative sequence voltage and current phasor components generated at the common coupling point on the user side; where, and is the negative sequence equivalent current source on the user side and the grid side; Z C2 and Z S2 It is the negative sequence reference impedance on the user side and the grid side.

5. A three-phase unbalanced responsibility division method and device, characterized in that: include: A derivation module is used to obtain the circuit expressions of the grid side and the user side by mathematical derivation with the common coupling point in the distribution system as the boundary, and to construct a negative sequence network equivalent model according to the circuit expressions; A balance module, used for calculating the negative sequence current unbalanced apparent power, the negative sequence voltage unbalanced apparent power and the negative sequence apparent power on the grid side and the user side according to the negative sequence network equivalent model; The loss module is used to calculate the unbalanced economic losses on the grid side and the user side according to the negative sequence current unbalanced apparent power, the negative sequence voltage unbalanced apparent power and the negative sequence apparent power. The expression is: Wherein, ω is the economic loss weight, i is the serial number of the economic loss assessment index, S refers to the grid side, C refers to the user side, M(x) represents the economic loss, x is the value of the economic loss assessment index, and p is the number of economic loss assessment indicators; the economic loss of a single economic loss assessment index and the economic loss weight formula are as follows: Among them, A i is the maximum economic loss, i is the serial number of the economic loss assessment index, is the sensitivity parameter, x is the value of the economic loss assessment index, and Z is the signal-to-noise ratio of the expected small characteristic; The responsibility module is used to determine the imbalance responsibility of power supply and use according to the ratio of the unbalanced economic losses on the power grid side and the user side.

6. A three-phase unbalanced responsibility division method and device, characterized in that: include: A memory for storing a computer executable program of the three-phase unbalance responsibility division method according to any one of claims 1 to 4; A processor is used to call the computer executable program and execute: taking the common coupling point in the distribution system as the boundary, obtaining the circuit expressions of the grid side and the user side through mathematical deduction, and constructing a negative-sequence network equivalent model according to the circuit expressions; calculating the negative-sequence current unbalanced apparent power, negative-sequence voltage unbalanced apparent power and negative-sequence apparent power of the grid side and the user side according to the negative-sequence network equivalent model; calculating the unbalanced economic losses of the grid side and the user side according to the negative-sequence current unbalanced apparent power, negative-sequence voltage unbalanced apparent power and negative-sequence apparent power; determining the unbalanced responsibility of power supply and consumption according to the ratio of the unbalanced economic losses of the grid side and the user side.

7. A storage medium, characterized in that: include: A computer executable program is stored, and the computer executable program is used to be called by a processor to execute the steps of the three-phase unbalance responsibility division method described in any one of claims 1 to 4.

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