Electric power system and control method of electric power system

Abstract

The invention discloses an electric power system and a control method of the electric power system, and relates to the field of electric power, and the method comprises the following steps: obtaining electric power information data, constructing an electric power twinborn model according to the electric power information data, and analyzing the electric power twinborn model; analyzing the constructed power twinning model to obtain a limit priority and a limit value; controlling the power twinborn model according to the obtained limit priority and the limit value; the stability and efficiency of the power system are improved.

Description

Technical Field

[0001] The present invention relates to the electric power field, and in particular to an electric power system and a control method of the electric power system. Background Art

[0002] With the continuous advancement of technology, the complexity and scale of power systems have gradually expanded. The stability, reliability, efficiency and safety of power systems have become the core issues of concern to the power industry in various countries. In order to meet these challenges, the control methods of power systems have continued to evolve, forming today's highly automated, intelligent and diversified power control system.

[0003] In the prior art, the instability of the power system cannot be accurately adjusted, which is prone to adjustment deviations, and the adjustment methods are limited, and the power system cannot be reasonably and effectively controlled. Therefore, a power system and a control method for the power system are now provided. Summary of the invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide a control method for an electric power system, comprising the following steps:

[0005] Step S1: acquiring power information data, constructing a power twin model according to the power information data, and analyzing the power twin model;

[0006] Step S2: Analyze the constructed power twin model to obtain the limited priority and limited value;

[0007] Step S3: Control the power twin model according to the obtained limited priority and limited value.

[0008] Furthermore, the process of obtaining power information data and constructing a power twin model based on the power information data includes:

[0009] Divide all areas included in the power system into several sub-areas, recorded as power areas, and label the divided power areas;

[0010] The power information data includes power area information data, power load value, load demand value and load collection time;

[0011] The power area information data includes power area structure information and power area equipment information;

[0012] According to the power area equipment information and power area structure information of the power information data, a power physical model is established, and the power load value, load demand value and load collection time are input into the corresponding positions of the power physical model to construct a power twin model.

[0013] Furthermore, the process of analyzing the power twin model includes:

[0014] Analyze the power twin model, obtain the load perception value according to the power load value and load demand value of each power area in the power twin model, and mark the load perception value in the corresponding power area;

[0015] Set load demand threshold ranges for power areas;

[0016] Setting a load demand margin in each power area according to the obtained power information data and the set load demand threshold range of the power area;

[0017] The load demand margin includes a first load demand margin, a second load demand margin, a third load demand margin and a fourth load demand margin;

[0018] The load demand margin corresponding to the load perception value in each power area is marked, and the first load demand margin, the second load demand margin, the third load demand margin and the fourth load demand margin are marked respectively.

[0019] Furthermore, the process of analyzing the constructed power twin model includes:

[0020] Obtaining the regional frequency in each power area, and recording the obtained regional frequency in each power area as Pn; obtaining the control capability value of the power area according to the obtained regional frequency in each power area, and recording it as Wn;

[0021] in, r1 is the weight coefficient of regional frequency, r2 is the weight coefficient of load demand of regional frequency, and the values ​​of r1 and r2 are both greater than zero;

[0022] Setting a threshold range for the regulation capability value of the power area;

[0023] According to the control capability value of the power area and the threshold range of the control capability value, the control capability level of the power area is obtained; the control capability level includes primary control capability, secondary control capability and tertiary control capability;

[0024] Set the frequency threshold range for the power area;

[0025] Obtaining the frequency priority of each power area according to the frequency threshold range of the power area;

[0026] The frequency priority includes a first frequency priority, a second frequency priority and a third frequency priority.

[0027] Furthermore, the constructed power twin model is analyzed and the process of obtaining the limited priority is as follows:

[0028] Obtaining the limited priority of each power area according to the level corresponding to the control capability of the power area and the level corresponding to the frequency priority;

[0029] The limited priorities include a first limited priority, a first limited priority second, a first limited priority third, a second limited priority, a second limited priority second, a second limited priority third, a third limited priority, a third limited priority second and a third limited priority third;

[0030] When the regulation capability within the power area is level three and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the first limited priority;

[0031] When the regulation capability within the power area is level three and the frequency priority of the power area is level two, the limited priority of the power area is recorded as the first limited second priority;

[0032] When the regulation capability within the power area is level three and the frequency priority of the power area is level three, the limited priority of the power area is recorded as the first limited level three priority;

[0033] When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the second limited priority;

[0034] When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the second limited second priority;

[0035] When the regulation capability within the power area is the second-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the second limited third priority;

[0036] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the third limited priority;

[0037] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the third limited second priority;

[0038] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the third limited third priority.

[0039] Furthermore, the constructed power twin model is analyzed and the process of obtaining the limit value includes:

[0040] Obtaining the regional frequency and regulation capability value of the power area corresponding to the limited priority, and obtaining the limited value of the power area according to the threshold range of the regulation capability value of the power area and the frequency threshold range of the power area;

[0041] According to the regional frequency and the frequency threshold range of the power area, the regional frequency difference value is obtained; according to the regulation capability value and the threshold range of the regulation capability value of the power area, the regional adjustment difference value is obtained; the limiting coefficient is set, and the limiting value of the power area is obtained according to the regional frequency difference value, the regional adjustment difference value and the limiting coefficient.

[0042] Furthermore, according to the obtained limited priority and limited value, the process of controlling the power twin model includes:

[0043] When the limited priority is the first limited priority, the first limited priority second, or the first limited priority third, a primary control signal is generated, and a limited value corresponding to the first limited priority, the first limited priority second, or the first limited priority third is stored in the primary control signal;

[0044] When the limited priority is the second limited priority, the second limited priority second, or the second limited priority third, a secondary control signal is generated, and a limited value corresponding to the second limited priority, the second limited priority second, or the second limited priority third is stored in the secondary control signal;

[0045] When the limited priority is the third limited priority, the third limited priority second, or the third limited priority third, a third-level control signal is generated, and a limited value corresponding to the third limited priority, the third limited priority second, or the third limited priority third is stored in the third-level control signal;

[0046] The control signal is sent to relevant staff, who formulate an adjustment plan for the power system based on the received control signal and the limit value in the control signal.

[0047] In another embodiment of the present invention, the present invention further discloses a power system, including a management center, characterized in that the management center is communicatively connected to a power collection module, a power analysis module and a power control module:

[0048] The power acquisition module is used to acquire power information data, build a power twin model based on the power information data, and analyze the power twin model;

[0049] The power analysis module is used to analyze the constructed power twin model to obtain a limited priority and a limited value;

[0050] The power control module is used to control the power twin model according to the obtained limited priority and limited value.

[0051] Compared with the prior art, the beneficial effects of the present invention are: constructing a power twin model, which can conduct real-time and effective analysis of the power system, reduce analysis errors and improve analysis efficiency; analyzing the power twin model can effectively monitor the load and frequency of the power system; obtaining limited priorities and limit values ​​can perform multi-level integrated control according to the frequency and load of the power system, thereby improving the control precision and accuracy of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of a flow chart of a control method for a power system according to an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the structure of an electric power system according to an embodiment of the present application. DETAILED DESCRIPTION

[0054] like Figure 1 As shown, a control method for an electric power system comprises the following steps:

[0055] Step S1: acquiring power information data, constructing a power twin model according to the power information data, and analyzing the power twin model;

[0056] Step S2: Analyze the constructed power twin model to obtain the limited priority and limited value;

[0057] Step S3: Controlling the power twin model according to the obtained limited priority and limited value;

[0058] It should be further explained that, in the specific implementation process, the process of obtaining power information data, building a power twin model based on the power information data, and analyzing the power twin model is as follows:

[0059] Divide all areas included in the power system into several sub-areas, denoted as power areas, and label the divided power areas as i, i=1, 2, 3, ..., n, n≥1 and n is an integer;

[0060] The power information data includes power area information data, power load value, load demand value and load collection time;

[0061] The power area information data includes power area structure information and power area equipment information;

[0062] It should be further explained that, in the specific implementation process, the power area structure information refers to the connection relationship and connection sequence between the power areas in the power system, and the power area equipment information refers to power generation equipment, substation equipment, transmission equipment, distribution equipment and monitoring equipment, etc.;

[0063] According to the power area equipment information and power area structure information of the power area information data, a power physical model is established, and the power load value, load demand value and load collection time are input into the corresponding positions of the power physical model to construct a power twin model;

[0064] Analyze the power twin model, calculate the difference between the power load value and the load demand value of each power area in the power twin model, obtain the load perception value, record the load perception value as Ei, and mark the load perception value in the corresponding power area;

[0065] Set the load demand threshold range of the power area, denoted as (E0, E1) and (E2, E3);

[0066] Setting a load demand margin in each power area according to the obtained power information data and the set load demand threshold range of the power area;

[0067] The load demand margin includes a first load demand margin, a second load demand margin, a third load demand margin and a fourth load demand margin;

[0068] The greater the difference between the load demand value and the power load value in the power area, the higher the demand margin in the power area;

[0069] When Ei≤E0, the load demand margin in the power area is set to the first load demand margin;

[0070] When E0<Ei<E1, the load demand margin in the power area is set to the second load demand margin;

[0071] When E1≤Ei≤E2, the load demand margin in the power area is set to a third load demand margin;

[0072] When Ei>E2, the load demand margin in the power area is set to the fourth load demand margin;

[0073] The load demand margin corresponding to the load sense value in each power area is recorded as Di. When the load demand margin in the power area is set to the first load demand margin, Di=p; when the load demand margin in the power area is set to the second load demand margin, Di=q; when the load demand margin in the power area is set to the third load demand margin, Di=s; when the load demand margin in the power area is set to the fourth load demand margin, Di=r;

[0074] It should be further explained that, in the specific implementation process, the first load demand margin is higher than the second load demand margin, which is higher than the third load demand margin, which is higher than the fourth load demand margin, that is, p>q>s>r; and the load demand margin is marked in each power area.

[0075] It should be further explained that the process of analyzing the constructed power twin model and obtaining the limited priority and limited value is as follows:

[0076] Acquire the regional frequency in each power area, and record the acquired regional frequency in each power area as Pn;

[0077] According to the regional frequencies in each power area obtained, the control capability value of the power area is obtained, which is recorded as Wn;

[0078] in, r1 is the weight coefficient of regional frequency, r2 is the weight coefficient of load demand of regional frequency, and the values ​​of r1 and r2 are both greater than zero;

[0079] Setting a threshold range of the control capability value of the power area, and recording the threshold range of the control capability value of the power area as (Wn0, Wn1);

[0080] When Wn≤Wn0, the control capability of the power area is recorded as the third-level control capability;

[0081] When Wn0<Wn<Wn1, the control capability of the power area is recorded as the secondary control capability;

[0082] When Wn≥Wn1, the control capacity of the power area is recorded as the first-level control capacity;

[0083] It should be further explained that, in the specific implementation process, the first-level regulating force is greater than the second-level regulating force, which is greater than the third-level regulating force;

[0084] Set the frequency threshold range of the power area, denoted as (P0, P1);

[0085] According to the frequency threshold range of the power area, the frequency priority of each power area is obtained;

[0086] The frequency priority includes a first frequency priority, a second frequency priority and a third frequency priority;

[0087] When Pn≤P0, the frequency attention priority of the power area is set to the first frequency priority;

[0088] When P0<Pn<P1, the priority of the frequency attention of the power area is set to the second frequency priority;

[0089] When Pn≥P1, the frequency attention priority of the power area is set to the third frequency priority;

[0090] It should be further explained that, in a specific implementation process, the first frequency priority is higher than the second frequency priority which is higher than the third frequency priority;

[0091] Obtaining the limited priority of each power area according to the level corresponding to the control capability of the power area and the level corresponding to the frequency priority;

[0092] The limited priorities include a first limited priority, a first limited priority second, a first limited priority third, a second limited priority, a second limited priority second, a second limited priority third, a third limited priority, a third limited priority second and a third limited priority third;

[0093] When the regulation capability within the power area is level three and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the first limited priority;

[0094] When the regulation capability within the power area is level three and the frequency priority of the power area is level two, the limited priority of the power area is recorded as the first limited second priority;

[0095] When the regulation capability within the power area is level three and the frequency priority of the power area is level three, the limited priority of the power area is recorded as the first limited level three priority;

[0096] When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the second limited priority;

[0097] When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the second limited second priority;

[0098] When the regulation capability within the power area is the second-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the second limited third priority;

[0099] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the third limited priority;

[0100] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the third limited second priority;

[0101] When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the third limited third priority;

[0102] It should be further explained that, in the specific implementation process, the first limit priority is higher than the first limit, the second limit priority is higher than the first limit, the third limit priority is higher than the second limit, the second limit priority is higher than the second limit, the third limit priority is higher than the third limit, the second limit priority is higher than the third limit, the third limit priority is higher than the third limit;

[0103] Obtain the regional frequency Pn and the regulation capability value Wn of the power area corresponding to the limited priority, and obtain the limited value of the power area according to the threshold range (Wn0, Wn1) of the regulation capability value of the power area and the frequency threshold range (P0, P1) of the power area;

[0104] The absolute value difference between the regional frequency Pn and P0 and P1 is calculated respectively to obtain the minimum difference, which is recorded as the regional frequency difference value; the absolute value difference between the regulation capacity value Wn and Wn0 and Wn1 is calculated respectively to obtain the minimum difference, which is recorded as the regional regulation difference value; a limiting coefficient is set, the regional frequency difference value and the regional regulation difference value are calculated by ratio, the obtained ratio calculation result is multiplied by the limiting coefficient, and the limiting value of the power area is obtained.

[0105] It should be further explained that, in the specific implementation process, according to the obtained limited priority and limited value, the process of controlling the power twin model is as follows:

[0106] When the limited priority is the first limited priority, the first limited priority second, or the first limited priority third, a primary control signal is generated, and a limited value corresponding to the first limited priority, the first limited priority second, or the first limited priority third is stored in the primary control signal;

[0107] When the limited priority is the second limited priority, the second limited priority second, or the second limited priority third, a secondary control signal is generated, and a limited value corresponding to the second limited priority, the second limited priority second, or the second limited priority third is stored in the secondary control signal;

[0108] When the limited priority is the third limited priority, the third limited priority second, or the third limited priority third, a third-level control signal is generated, and a limited value corresponding to the third limited priority, the third limited priority second, or the third limited priority third is stored in the third-level control signal;

[0109] It should be further explained that, in the specific implementation process, the urgency of the first-level control signal is greater than the urgency of the second-level control signal, which is greater than the urgency of the third-level control signal;

[0110] The control signal is sent to relevant staff, who formulate an adjustment plan for the power system based on the received control signal and the limit value in the control signal.

[0111] like Figure 2 As shown, in another embodiment of the present invention, the present invention further discloses a power system, including a management center, characterized in that the management center is communicatively connected with a power collection module, a power analysis module and a power control module:

[0112] The power acquisition module is used to acquire power information data, build a power twin model based on the power information data, and analyze the power twin model;

[0113] The power analysis module is used to analyze the constructed power twin model to obtain a limited priority and a limited value;

[0114] The power control module is used to control the power twin model according to the obtained limited priority and limited value.

[0115] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

[0116] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control method for an electric power system, characterized in that: The following steps are involved: Step S1: acquiring power information data, constructing a power twin model according to the power information data, and analyzing the power twin model; Step S2: Analyze the constructed power twin model to obtain the limited priority and limited value; Step S3: Control the power twin model according to the obtained limited priority and limited value.

2. A control method for an electric power system according to claim 1, characterized in that: The process of obtaining power information data and building a power twin model based on the power information data includes: Divide all areas included in the power system into several sub-areas, recorded as power areas, and label the divided power areas; The power information data includes power area information data, power load value, load demand value and load collection time; The power area information data includes power area structure information and power area equipment information; According to the power area equipment information and power area structure information of the power information data, a power physical model is established, and the power load value, load demand value and load collection time are input into the corresponding positions of the power physical model to construct a power twin model.

3. A control method for a power system according to claim 2, characterized in that: The process of analyzing the power twin model includes: Analyze the power twin model, obtain the load perception value according to the power load value and load demand value of each power area in the power twin model, and mark the load perception value in the corresponding power area; Set load demand threshold ranges for power areas; Setting a load demand margin in each power area according to the obtained power information data and the set load demand threshold range of the power area; The load demand margin includes a first load demand margin, a second load demand margin, a third load demand margin and a fourth load demand margin; The load demand margin corresponding to the load perception value in each power area is marked, and the first load demand margin, the second load demand margin, the third load demand margin and the fourth load demand margin are marked respectively.

4. A control method for an electric power system according to claim 3, characterized in that: The process of analyzing the constructed power twin model includes: Obtaining the regional frequency in each power area, and recording the obtained regional frequency in each power area as Pn; obtaining the control capability value of the power area according to the obtained regional frequency in each power area, and recording it as Wn; in, r1 is the weight coefficient of regional frequency, r2 is the weight coefficient of load demand of regional frequency, and the values ​​of r1 and r2 are both greater than zero; Setting a threshold range for the regulation capability value of the power area; According to the control capability value of the power area and the threshold range of the control capability value, the control capability level of the power area is obtained; the control capability level includes primary control capability, secondary control capability and tertiary control capability; Set the frequency threshold range for the power area; According to the frequency threshold range of the power area, the frequency priority of each power area is obtained; The frequency priority includes a first frequency priority, a second frequency priority and a third frequency priority.

5. A control method for an electric power system according to claim 4, characterized in that: The constructed power twin model is analyzed and the process of obtaining the limited priority is as follows: Obtaining the limited priority of each power area according to the level corresponding to the control capability of the power area and the level corresponding to the frequency priority; The limited priorities include a first limited priority, a first limited priority second, a first limited priority third, a second limited priority, a second limited priority second, a second limited priority third, a third limited priority, a third limited priority second and a third limited priority third; When the regulation capability within the power area is level three and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the first limited priority; When the regulation capability within the power area is level three and the frequency priority of the power area is level two, the limited priority of the power area is recorded as the first limited second priority; When the regulation capability within the power area is level three and the frequency priority of the power area is level three, the limited priority of the power area is recorded as the first limited level three priority; When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the second limited priority; When the regulation capability within the power area is the secondary regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the second limited second priority; When the regulation capability within the power area is the second-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the second limited third priority; When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the first frequency priority, the limited priority of this power area is recorded as the third limited priority; When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the second frequency priority, the limited priority of this power area is recorded as the third limited second priority; When the regulation capability within the power area is the first-level regulation capability and the frequency priority of the power area is the third frequency priority, the limited priority of this power area is recorded as the third limited third priority.

6. A control method for an electric power system according to claim 5, characterized in that: The process of analyzing the constructed power twin model and obtaining the limit value includes: Obtaining the regional frequency and regulation capability value of the power area corresponding to the limited priority, and obtaining the limited value of the power area according to the threshold range of the regulation capability value of the power area and the frequency threshold range of the power area; According to the regional frequency and the frequency threshold range of the power area, the regional frequency difference value is obtained; according to the regulation capability value and the threshold range of the regulation capability value of the power area, the regional adjustment difference value is obtained; the limiting coefficient is set, and the limiting value of the power area is obtained according to the regional frequency difference value, the regional adjustment difference value and the limiting coefficient.

7. A control method for an electric power system according to claim 6, characterized in that: According to the obtained limited priority and limited value, the process of controlling the power twin model includes: When the limited priority is the first limited priority, the first limited priority second, or the first limited priority third, a primary control signal is generated, and a limited value corresponding to the first limited priority, the first limited priority second, or the first limited priority third is stored in the primary control signal; When the limited priority is the second limited priority, the second limited priority second, or the second limited priority third, a secondary control signal is generated, and a limited value corresponding to the second limited priority, the second limited priority second, or the second limited priority third is stored in the secondary control signal; When the limited priority is the third limited priority, the third limited priority second, or the third limited priority third, a third-level control signal is generated, and a limited value corresponding to the third limited priority, the third limited priority second, or the third limited priority third is stored in the third-level control signal; The control signal is sent to relevant staff, who formulate an adjustment plan for the power system based on the received control signal and the limit value in the control signal.

8. A power system, specifically applied to a control method of a power system according to any one of claims 1 to 7, comprising a management center, characterized in that: The management center is communicatively connected with a power collection module, a power analysis module and a power control module: The power acquisition module is used to acquire power information data, build a power twin model based on the power information data, and analyze the power twin model; The power analysis module is used to analyze the constructed power twin model to obtain a limited priority and a limited value; The power control module is used to control the power twin model according to the obtained limited priority and limited value.

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