Dynamic dispatching method for integrating distributed power subsystem into power grid subsystem

Abstract

The present invention proposes a dynamic scheduling method for incorporating a distributed power subsystem into a power grid subsystem, wherein the intelligent grid control subsystem dynamically configures the incorporation capability parameters and grouping parameters for the power grid subsystem to be incorporated into the distributed power subsystem; the distributed power subsystem is incorporated into service according to the configured parameters. By adopting the method of the present invention, the intelligent grid control subsystem comprehensively considers the incorporation capability and working status of the distributed power subsystem and the power demand of the power grid subsystem, and then dynamically adjusts the incorporation relationship between the distributed power subsystem and the power grid subsystem, effectively ensuring that the power supply of each power grid subsystem is sufficient and reliable, and at the same time, can effectively eliminate redundant incorporation and increase the service life of the distributed power subsystem.

Description

Technical Field

[0001] The present invention relates to the field of electric power, and in particular to a dynamic scheduling method for incorporating a distributed power subsystem into a power grid subsystem. Background Art

[0002] With the development of various power generation technologies, many power generation schemes have emerged, including wind power generation, solar power generation, hydropower generation, and biogas power generation. However, how to integrate the parts into a whole, effectively utilize the electricity generated in various environments, and aggregate the electricity to serve various people's livelihood projects and daily life is a very critical task.

[0003] The main method at present is to integrate the electricity produced by the above-mentioned technologies into the power grid, and then the power grid integrates it into a whole to serve residents or commercial entities in various regions.

[0004] However, the existing technology focuses on the safety management of the integration of distributed power sources into the power grid. There is not much research on how to effectively integrate the distributed power sources required for integration into the power grid, and how to ensure sufficient power supply while improving the service life of the distributed power sources. Therefore, how to propose a distributed power grid connection control method that can effectively ensure sufficient and reliable power supply for each power grid subsystem and improve the service life of the distributed power subsystem is a problem that needs to be solved in the industry. Summary of the invention

[0005] The purpose of the present invention is to propose a dynamic scheduling method for incorporating distributed power subsystems into power grid subsystems. By dynamically adjusting the incorporation relationship between distributed power subsystems and power grid subsystems, it is effectively ensured that the power supply of each power grid subsystem is sufficient and reliable, and by eliminating redundant incorporation, the service life of the distributed power subsystem is improved.

[0006] The technical solution to the technical problem to be solved by the present invention is: a dynamic scheduling method for incorporating a distributed power subsystem into a power grid subsystem, comprising the following steps:

[0007] Step 1, the smart grid control subsystem determines the energy demand EnergyNeed_i, the current energy supply EnergySupply_i, and the electrical type Type_i of each grid subsystem, where i represents the unique number of each grid subsystem under the control of the smart grid control subsystem;

[0008] Step 2: The smart grid control subsystem obtains the capability category information CombineType_j_k and the electric energy information CombineEnergy_j_k of the distributed power subsystem that currently initiates the merge request, where j represents the unique number of each distributed power subsystem under the control of the smart grid control subsystem, and k represents the capability category number of the distributed power subsystem j;

[0009] First, the smart grid control subsystem first determines the type value where CombineType_j_k and Type_i have an intersection;

[0010] Then, find out the power grid subsystem corresponding to the maximum value of EnergyNeed_i-EnergySupply_i from the power grid subsystems corresponding to the type values ​​of the intersection;

[0011] Finally, configure the distributed power source as the electrical type of the grid subsystem, select the grid subsystem for integration, and define the integrated electric energy as EnergyCurrentInput;

[0012] If the power supply of each grid subsystem has reached the threshold of EnergyNeed_i, the distributed power subsystem requested to be incorporated will not be accepted;

[0013] Accordingly, the smart grid control subsystem configures the distributed power subsystem to enter an idle state;

[0014] When the smart grid control subsystem receives the abnormal disconnection information reported by the distributed power subsystem, it broadcasts the electrical type of the distributed power subsystem to the jurisdiction. After receiving the information, the distributed power subsystem in the jurisdiction that is idle will initiate a connection request to the smart grid control subsystem if it can provide the connection service of the electrical type.

[0015] Step 3: Calculate the result of EnergySupply_i+EnergyCurrentInput and update the result to EnergySupply_i.

[0016] Preferably, the dynamic scheduling includes configuring the incorporated capability parameters and configuring the grouping parameters.

[0017] Better yet, when the electric energy of the distributed power sources scheduled by the smart grid control subsystem to be incorporated into the grid subsystem increases, the smart grid control subsystem correspondingly lowers the power output of the energy-consuming power stations, thereby reducing energy consumption.

[0018] Preferably, when the total power supply of at least one distributed power subsystem belonging to the same power grid subsystem reaches the demand, the energy-consuming power station is controlled to enter a low power consumption state and does not output power.

[0019] Better yet, when the capability information of the distributed power subsystem initiating the incorporation request does not match the capability information of the power grid subsystem governed by the smart grid control subsystem, the smart grid control subsystem replies a rejection message to the distributed power subsystem, and after receiving the message, the distributed power subsystem enters an idle state.

[0020] Preferably, the distributed power subsystem is put into service according to configured parameters.

[0021] Better, configuration information: configure this distributed power subsystem to the configured electrical type, and select the power grid subsystem to be incorporated into it for integration into service.

[0022] Better yet, when the distributed power subsystem detects that there is a problem with the quality of the power output by the subsystem, it disconnects itself and returns to service, and reports the abnormal disconnection information of the distributed power subsystem to the smart grid control subsystem.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects: by adopting the approach of the present invention, the smart grid control subsystem comprehensively considers the integration capability and working status of the distributed power subsystem and the power demand of the power grid subsystem, and then dynamically adjusts the integration relationship between the distributed power subsystem and the power grid subsystem, effectively ensuring that the power supply of each power grid subsystem is sufficient and reliable. In addition, since the smart grid control subsystem dispatches the distributed electronic system for integration into service as needed, it can effectively eliminate redundant integration and increase the service life of the distributed power subsystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the control method flow of a distributed power source group being connected to a power grid;

[0025] Figure 2 It is a schematic diagram of a control system for integrating a distributed power source group into a power grid;

[0026] In the figure: DETAILED DESCRIPTION

[0027] In order to make the technical solutions and beneficial effects of the present invention clearer, the embodiments of the present invention are further explained in detail below.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] A control method for connecting a distributed power source group to a power grid, such as Figure 1 As shown, it specifically includes the following steps:

[0030] Step 1: The distributed power subsystem initiates an integration request to the smart grid control subsystem, wherein the integration request at least includes integration capability information of the distributed power subsystem;

[0031] Step 2: The smart grid control subsystem dynamically dispatches the grid subsystem to be incorporated into the distributed power subsystem, and configures the incorporated capacity parameters and grouping parameters;

[0032] Step 3: The distributed power subsystem is put into service according to the configured parameters.

[0033] In steps 1, 2, and 3, the system is composed of at least one distributed power subsystem, at least one power grid subsystem, a smart grid control subsystem, and an energy-consuming power station (the energy-consuming power station is optional);

[0034] In the step 1, the integration capability information is used to indicate the number of capability categories supported by the distributed power subsystem and the electrical type of the power grid subsystem that can be integrated into each capability category;

[0035] In step 2, the dynamic scheduling method is:

[0036] Step 2.1, the smart grid control subsystem determines the energy demand EnergyNeed_i, the current energy supply EnergySupply_i, and the electrical type Type_i of each grid subsystem, where i represents the unique number of each grid subsystem under the control of this smart grid control subsystem, and the value range is {1, MaxEleSyetemNum}, where MaxEleSyetemNum represents the maximum number of grid subsystems controlled by this smart grid control subsystem;

[0037] Step 2.2: The smart grid control subsystem generates the CombineType_j_k and CombineEnergy_j_k information of the distributed power subsystem that currently initiates the merge request.

[0038] Wherein, j represents the unique number of each distributed power subsystem under the control of this smart grid control subsystem, and the value range is {1, MaxEleSourceNum}, where MaxEleSourceNum represents the maximum number of distributed power subsystems controlled by this smart grid control subsystem.

[0039] k represents the number of capability categories of distributed power subsystem j, and its value range is {1, MaxClassNum_j}, where MaxClassNum_j represents the maximum number of capability categories included in distributed power subsystem j.

[0040] The smart grid control subsystem first determines the type value with which there is an intersection, and then finds the grid subsystem corresponding to the maximum value of EnergyNeed_i-EnergySupply_i from the grid subsystem corresponding to the type value of the intersection, and configures the distributed power source as the electrical type of the grid subsystem, and selects the grid subsystem for incorporation, and the incorporated electric energy is defined as EnergyCurrentInput. It is particularly noted that if the power supply of each grid subsystem has reached the threshold of EnergyNeed_i, the distributed power subsystem requested to be incorporated is not accepted, and accordingly, the smart grid control subsystem configures the distributed power subsystem to enter an idle state, which means that the distributed power subsystem is only in the state of monitoring the dispatching command from the smart grid control subsystem, and other functions are completely stopped (this state can make other devices in the distributed power subsystem in a power-off state, and the equipment does not need to operate, which will not cause depreciation, and ultimately extend its service life).

[0041] Step 2.3: Calculate the result of EnergySupply_i+EnergyCurrentInput and update the result to EnergySupply_i.

[0042] In step 3, the distributed power subsystem configures the distributed power subsystem to the configured electrical type according to the configuration information, and selects the power grid subsystem to be incorporated into the distributed power subsystem for integration into service.

[0043] In step 3, when the distributed power subsystem detects that there is a problem with the quality of the power output by the subsystem, it disconnects itself and puts it into service, and reports the abnormal disconnection information of the distributed power subsystem to the smart grid control subsystem;

[0044] In the step 2.2, when the smart grid control subsystem receives the abnormal disconnection information reported by the distributed power subsystem, it broadcasts the electrical type of the distributed power subsystem to the jurisdiction. After receiving the information, the distributed power subsystem in the idle state in the jurisdiction initiates an integration request to the smart grid control subsystem if the local end can provide the integration service of this electrical type.

[0045] In steps 1, 2, and 3, the power grid subsystem is jointly powered by distributed power sources and energy-consuming power stations. When the electric energy of the distributed power sources scheduled and incorporated into the power grid subsystem by the smart grid control subsystem increases, the smart grid control subsystem correspondingly lowers the power output of the energy-consuming power station to reduce energy consumption. When the total power supply of at least one distributed power subsystem belonging to the same power grid subsystem meets the demand, the energy-consuming power station is controlled to enter a low power consumption state and does not output electric energy.

[0046] In the steps 1, 2, and 3, the power grid subsystem is divided into two types: a power grid subsystem supplied solely by an energy-consuming power station (i.e., a type 1 power grid subsystem) and a power grid subsystem supplied only by a distributed power subsystem (i.e., a type 2 power grid subsystem). The type 2 power grid subsystem is used as the preferred service system, and the type 1 power grid subsystem is used as the backup system. When the type 2 power grid subsystem reaches the power supply capacity of the type 1 power grid subsystem, the smart grid control subsystem enables the type 2 electronic system to supply power, and controls the type 1 power grid subsystem to enter a low energy consumption state, thereby saving energy consumption.

[0047] In step 2, when the capability information of the distributed power subsystem initiating the incorporation request does not match the capability information of the power grid subsystem governed by the smart grid control subsystem, the smart grid control subsystem replies a rejection message to the distributed power subsystem, and after receiving the message, the distributed power subsystem enters an idle state.

[0048] Example, here with Figure 2 Take the example to explain a control system for connecting a distributed power source group to a power grid proposed by the present invention.

[0049] like Figure 2 As shown, a control system for integrating a distributed power source group into a power grid includes: a smart grid control subsystem, a power grid subsystem, and a distributed power source subsystem. The functions of each subsystem are as follows:

[0050] Smart grid control subsystem: This subsystem is responsible for dynamically scheduling the integration relationship between the distributed power subsystem and the power grid subsystem, and rescheduling each distributed power subsystem to supply power according to the abnormal situation of the distributed power subsystem. In addition, this subsystem is also responsible for switching control between the preferred power grid subsystem and the backup power grid subsystem, or, when the distributed power is integrated to increase power, the subsystem is also responsible for correspondingly reducing the power output of energy-consuming power stations;

[0051] Grid subsystem: This subsystem is responsible for serving the residents or businesses in the area under its jurisdiction;

[0052] Distributed power subsystem: This subsystem is responsible for initiating the connection request and performing the connection operation according to the request response. It is also responsible for monitoring the new connection request trigger message and initiating a new round of connection request;

[0053] Energy-consuming power stations: use coal and other energy sources to generate electricity and are integrated into the distributed power grid subsystem.

[0054] The following is a specific embodiment to describe a specific implementation of a control system for integrating a distributed power source group into a power grid:

[0055] In embodiment 1, the power grid subsystem is powered by a distributed power source and an energy-consuming power station in coordination:

[0056] In this embodiment, the smart grid control subsystem governs one grid subsystem (numbered as grid subsystem 1, and grid subsystem 1 adopts electrical type 1 for power transmission), five distributed power subsystems (numbered 1, 2, 3, 4, and 5 in sequence, where distributed power subsystems 1, 2, and 3 only support electrical type 1 for power integration into the grid subsystem; distributed power subsystems 4 and 5 only support electrical type 2 for power integration into the grid subsystem), and one energy-consuming power station (numbered as energy-consuming power station 1). At time T0, the smart grid control subsystem starts grid subsystem 1 to work, and accordingly, the energy-consuming power station supplies power according to the preset power demand. At time 1, the distributed grid 5 initiates a request for incorporation. Since the incorporation capability of the distributed grid 5 belongs to electrical type 2, and the electrical type of the grid subsystem 1 governed by the smart grid control subsystem is only 1, the types do not match. Therefore, the smart grid control subsystem replies a rejection message to the distributed grid 5. After receiving the message, the distributed grid 5 enters an idle state (at this time, the power generation equipment of the distributed grid 5 does not work, does not cause equipment depreciation, and can increase the service life of the equipment). At time T2, the distributed grid 1 initiates a request for incorporation. Since the incorporation capability of the distributed grid 1 belongs to electrical type 1, and the electrical type of the grid subsystem 1 governed by the smart grid control subsystem is also 1, therefore, Type matches, so the smart grid control subsystem replies to the distributed grid 1 with the information of receiving the incorporation and the specific incorporation electrical type, and after a preset delay value (the delay value is the response time of the distributed power subsystem incorporating into the grid subsystem), the smart grid control subsystem incrementally updates the distributed grid incorporation power value, and controls the energy-consuming power station to reduce the corresponding amount of power output (thereby saving energy and improving the environment). At T3, the distributed power source 2 initiates an incorporation request, and the corresponding processing process is similar to that at T2; assuming that the total power of the distributed power subsystem 1 and the distributed power subsystem 2 can already meet the overall power supply demand at this time, therefore, the smart grid control subsystem controls The energy-consuming power station enters a low-power state and does not output electric energy; at T4, the distributed power grid subsystem 3 sends a request for incorporation to the smart grid control subsystem. Since the power supply demand has been met, the smart grid control subsystem replies a rejection message to the distributed power grid subsystem 3, and the distributed power subsystem 3 enters an idle state. At T5, the distributed power subsystem 1 detects that there is a problem with its own power quality, so it disconnects the incorporation switch and reports abnormal information to the smart grid control subsystem. After receiving the information, the smart control initiates an incorporation demand broadcast. After receiving the broadcast, the distributed power grid subsystem 3 completes the incorporation operation and replenishes electric energy. The processing of various states at other times is similar to the aforementioned times.It can be seen from this embodiment that after adopting the method of the present invention, by dynamically scheduling the incorporation requests of distributed power sources, on the one hand, accurate on-demand service can be achieved, effectively avoiding redundant operation of distributed power supply equipment, causing equipment depreciation, and affecting the service life; on the other hand, by utilizing the electric energy of distributed power subsystems (such subsystems generate electric energy from natural clean energy such as wind energy, hydropower, solar energy, etc.), the energy consumption of energy-consuming power stations can be effectively reduced, further saving costs, and also helping to improve the environment.

[0057] Embodiment 2: Type 1 power grid subsystem and type 2 power grid subsystem perform priority selection for power supply:

[0058] This embodiment is similar to Embodiment 1, with the only difference being that the type-two grid subsystem is powered only by the distributed power subsystem (the distributed power subsystem is powered by clean energy such as hydropower, wind power, solar power, etc., and is a preferred system. Selecting this system means that the type-one grid subsystem can be omitted, thereby saving energy consumption, reducing power generation costs, and improving the environment). The type-one grid subsystem is a grid subsystem that is supplied solely by an energy-consuming power station. After power-on at time T0, the type-one grid subsystem provides power supply services. After times T1, T2, ..., Tk, the total electric energy incorporated into the type-two grid subsystem has met the total electric energy demand. Therefore, the smart grid control subsystem switches the power supply switch to the type-two grid subsystem for power supply. Accordingly, the type-one grid subsystem is controlled to enter the low-power consumption module to achieve the goal of energy saving. It can be seen from this embodiment that after adopting the method of the present invention, the electric energy integration control of the type two power grid subsystem is completed on demand by dynamically scheduling the integration request of distributed power sources. After the electric energy meets the demand, the type two power grid subsystem is switched as the power supply, and the type one power grid subsystem is controlled to enter a low power consumption state. Therefore, on the one hand, precise on-demand service is achieved, and redundant operation of distributed power supply equipment is effectively avoided, resulting in equipment depreciation and affecting the service life; on the other hand, by utilizing the electric energy of distributed power subsystems (this type of subsystem generates electric energy from natural clean energy such as wind energy, hydropower, and solar energy), the energy consumption of energy-consuming power stations can be effectively reduced, further saving costs, and also helping to improve the environment.

[0059] It can be seen from the above embodiments that: by adopting the approach of the present invention, the smart grid control subsystem comprehensively considers the integration capability and working status of the distributed power subsystem, and the power demand of the power grid subsystem, and then dynamically adjusts the integration relationship between the distributed power subsystem and the power grid subsystem, effectively ensuring that the power supply of each power grid subsystem is sufficient and reliable. In addition, since the smart grid control subsystem dispatches the distributed electronic system for integration into service as needed, it can effectively eliminate redundant integration and increase the service life of the distributed power subsystem.

[0060] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Through the above description, relevant staff can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification. All so-called equal changes and modifications of the shapes, structures, features and spirits described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A dynamic dispatching method for incorporating a distributed power subsystem into a power grid subsystem, characterized in that: The smart grid control subsystem comprehensively considers the integration capability and working status of the distributed power subsystem and the power demand of the grid subsystem, and then dynamically adjusts the integration relationship between the distributed power subsystem and the grid subsystem. The specific steps are as follows: Step 1, the smart grid control subsystem determines the energy demand EnergyNeed_i, the current energy supply EnergySupply_i, and the electrical type Type_i of each grid subsystem, where i represents the unique number of each grid subsystem under the control of the smart grid control subsystem; Step 2: The smart grid control subsystem obtains the capability category information CombineType_j_k and the electric energy information CombineEnergy_j_k of the distributed power subsystem that currently initiates the merge request, where j represents the unique number of each distributed power subsystem under the control of the smart grid control subsystem, and k represents the capability category number of the distributed power subsystem j; First, the smart grid control subsystem first determines the type value where CombineType_j_k and Type_i have an intersection; Then, find out the power grid subsystem corresponding to the maximum value of EnergyNeed_i-EnergySupply_i from the power grid subsystems corresponding to the type values ​​of the intersection; Finally, configure the distributed power source as the electrical type of the grid subsystem, select the grid subsystem for integration, and define the integrated electric energy as EnergyCurrentInput; If the power supply of each grid subsystem has reached the threshold of EnergyNeed_i, the distributed power subsystem requested to be incorporated will not be accepted; Accordingly, the smart grid control subsystem configures the distributed power subsystem to enter an idle state; When the smart grid control subsystem receives the abnormal disconnection information reported by the distributed power subsystem, it broadcasts the electrical type of the distributed power subsystem to the jurisdiction. After receiving the information, the distributed power subsystem in the jurisdiction that is idle will initiate a connection request to the smart grid control subsystem if it can provide the connection service of the electrical type. Step 3: Calculate the result of EnergySupply_i+EnergyCurrentInput and update the result to EnergySupply_i.

2. The dynamic dispatching method for incorporating a distributed power subsystem into a power grid subsystem according to claim 1, characterized in that: Dynamic scheduling includes configuring the incorporated capability parameters and configuring the grouping parameters.

3. The dynamic dispatching method for incorporating a distributed power subsystem into a power grid subsystem according to claim 1, characterized in that: When the electric energy of the distributed power sources dispatched and incorporated into the power grid subsystem by the smart grid control subsystem increases, the smart grid control subsystem correspondingly lowers the power output of the energy-consuming power station, thereby reducing energy consumption.

4. The method for dynamically dispatching a distributed power subsystem into a power grid subsystem according to claim 1, characterized in that: When the total power supply of at least one distributed power subsystem belonging to the same power grid subsystem reaches the demand, the energy-consuming power station is controlled to enter a low power consumption state and does not output power.

5. The dynamic dispatching method for incorporating a distributed power subsystem into a power grid subsystem according to claim 1, characterized in that: When the capability information of the distributed power subsystem initiating the incorporation request does not match the capability information of the power grid subsystem governed by the smart grid control subsystem, the smart grid control subsystem replies a rejection message to the distributed power subsystem, and the distributed power subsystem enters an idle state after receiving the message.

6. The method for dynamically dispatching a distributed power subsystem into a power grid subsystem according to claim 1, characterized in that: The distributed power subsystem is put into service according to the configured parameters.

7. The dynamic dispatching method for incorporating a distributed power subsystem into a power grid subsystem according to claim 6, characterized in that: Configuration information: Configure this distributed power subsystem to the configured electrical type, and select the power grid subsystem to be incorporated into it for integration into service.

8. The method for dynamically dispatching a distributed power subsystem into a power grid subsystem according to claim 7, characterized in that: When the distributed power subsystem detects that there is a problem with the quality of the power output by the subsystem, it disconnects itself and returns to service, and reports the abnormal disconnection information of the distributed power subsystem to the smart grid control subsystem.

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