Control method and device for multi-integrated new energy participating in new power system

Abstract

The present invention discloses a control method and device for a new type of power system in which multiple integrated new energy sources participate. The control method of the present invention includes: establishing a coordinated control architecture; monitoring whether a disturbance accident occurs in the power grid based on a wide area information collection system; if a disturbance accident occurs, the virtual power plant receives the monitoring information and determines that the new power system is in an emergency state and switches to the emergency agent of the virtual power plant; if no disturbance accident occurs, the virtual power plant receives the monitoring information and determines that the new power system is in a normal state, and optimizes the dispatching agent based on the virtual power plant to make corresponding controls according to different states; the power and current controllers of the lower-level photovoltaic, wind power and energy storage judge the communication state with the upper-level dispatching according to the message information, and perform active and reactive power control within the station according to the dispatching instructions under normal communication state. The present invention improves the operating efficiency of the new power system, increases the safety and stability of the new power system, and improves the power grid's ability to absorb new energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of safe and stable control of power systems, and relates to a control method and device for a multi-integrated new energy station to participate in safe and stable support of a new power system. Background Art

[0002] The large-scale development of renewable energy and energy storage is an inevitable choice driven by the dual carbon goals. The access of large-scale wind power, photovoltaics, electric vehicles and ultra-high voltage direct current has made how to ensure their safe and stable operation, support the consumption of renewable energy, and support the operation of the power grid a new challenge for the new power system.

[0003] The massive heterogeneous new energy grid connection will lead to significant changes in the stable control resources on the power supply side of the new power system. Different from traditional centralized thermal power units, new energy has lower observability and controllability, and is generally equivalent to a negative load. Its organizational form and mechanism for participating in stable control need to be studied urgently. Load shedding is an important measure among the three lines of defense, which can effectively prevent the collapse of the power grid, but it has the problems of high cost and large negative social impact. Accurate load shedding reduces the controlled voltage level, extending from the substation outlet to the interruptible large user load, which reduces the cost and negative impact to a certain extent. However, in the new power system, the controllable resources such as traditional centralized thermal power units are reduced, and the way to increase load shedding / fine load shedding control to ensure its safety and stability is relatively limited. How to balance the contradiction between the steady-state operation economy and transient response capability of new energy, and effectively aggregate and participate in the safe and stable control of large power grids, is also an issue that needs to be studied urgently.

[0004] Current research content mainly focuses on the field of safe and stable support for systems involving single wind / solar / storage stations, especially there are relatively few emergency support strategies. There is still little research on the emergency support field for systems involving multiple energy complementarities such as "wind power + photovoltaics + energy storage". Summary of the invention

[0005] In view of the fact that there is currently little research in the field of safe and stable support for the system of "wind power + photovoltaic + energy storage" with multiple energy complementarity, the present invention proposes a control method and device for the participation of multiple integrated new energy stations in the safe and stable support of the new power system. The method mainly combines the upper-level dispatching based on the coordinated control strategy of the virtual power plant participating in the active and reactive emergency support of the new power system with the rapid control of the active and reactive power of the lower-level wind, photovoltaic and energy storage new energy stations participating in the grid connection point, considers the power constraint of the wind, photovoltaic and energy storage output, and constructs a control method and device for the participation of multiple integrated new energy stations such as wind, photovoltaic and energy storage in the safe and stable support of the new power system, supports the frequency and voltage of the power grid, and improves the stability of the system.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: a control method for a new power system in which multiple integrated new energy sources participate, which includes:

[0007] Step 1: Establish a coordinated control framework for the participation of multiple integrated new energy stations in the safe and stable support of the new power system based on virtual power plants. The coordinated control framework includes a large power grid control layer as the outer layer, a virtual power plant management layer as the upper layer, and an internal station control layer as the lower layer. The upper and lower layers constitute the inner layer.

[0008] Step 2: Monitor whether a disturbance accident occurs in the power grid based on the wide area information collection system. If a disturbance accident occurs, the virtual power plant in the virtual power plant management layer receives the monitoring information and determines that the new power system is in an emergency state and transfers to the emergency dispatch agent of the virtual power plant; if no disturbance accident occurs, the virtual power plant receives the monitoring information and determines that the new power system is in a normal state, and based on the virtual power plant optimization dispatch agent, makes corresponding controls according to different states and sends corresponding instructions to the internal site control layer;

[0009] Step 3: The power and current controllers of photovoltaic, wind power and energy storage at the internal site control layer determine the dispatching communication status with the virtual power plant management layer based on the message information. When the communication is normal, the active and reactive power control within the station is performed according to the dispatching instructions. If the communication is interrupted, the power and current controllers of photovoltaic, wind power and energy storage perform active and reactive output control according to the requirements of the new power system.

[0010] Furthermore, in step 1, the virtual power plant aggregates new energy and is connected to the new power system grid through a virtual common coupling point. The large power grid system is divided into a centralized thermal power plant and a virtual power plant with a diversified integration of wind, solar and storage new energy, which are managed separately.

[0011] Furthermore, in step 3, the power and current controllers of photovoltaic, wind power and energy storage respectively receive control instructions issued by their respective agents of the virtual power plant. When they are unable to receive control instructions, they judge the active power demand and reactive power demand according to the frequency and voltage deviations of the new power system detected by their respective controllers, and perform active and reactive power output control through closed-loop control.

[0012] Furthermore, in step 2, the large power grid control layer as the outer layer performs unified control over the virtual power plant, centralized thermal power and other controllable resources based on the wide area information collection system;

[0013] The virtual power plant and the large power grid control layer interact with each other through the information network for data collection and control instructions, and interact at the physical level through the virtual common coupling point;

[0014] The virtual power plant management layer uses a multi-agent system, which consists of an emergency dispatch agent, an optimization dispatch agent, a photovoltaic agent, a wind power agent, and an energy storage agent at the site level. The dispatch agent centrally receives information from agents at the site level and issues control instructions. The site level agent monitors and uploads wind, solar, and energy storage power information and issues control instructions to the power and current controllers of photovoltaic, wind power, and energy storage.

[0015] The virtual power plant collects data to determine whether the new power system is in normal operation or emergency state, and sends active and reactive power control instructions to photovoltaic agents, wind power agents and energy storage agents through the optimization dispatch agent or emergency dispatch agent.

[0016] Furthermore, in step 3, each control agent of photovoltaic, wind power and energy storage receives the control signal of the upper virtual power plant, and sends it to each controller, and the controller determines whether it has received the control signal of the upper control agent; when the communication is normal, each controller normally receives the control signal of the control agent, and sends or absorbs the corresponding active and reactive power according to the control requirements; when the communication is abnormal, each controller cannot receive the control signal of the control agent, and the controller forms an inner loop control signal according to the frequency and voltage deviation of the new power system collected by the grid connection point, and outputs the active and reactive power required by the new power system.

[0017] Another technical solution adopted by the present invention is: a control device for a new power system in which multiple integrated new energy sources participate, which includes:

[0018] Coordinated control framework establishment unit: Establish a coordinated control framework for the participation of multiple integrated new energy sites in the safe and stable support of the new power system based on virtual power plants. The coordinated control framework includes a large power grid control layer as the outer layer, a virtual power plant management layer as the upper layer, and an internal site control layer as the lower layer. The upper and lower layers constitute the inner layer;

[0019] Disturbance accident monitoring unit: Based on the wide-area information collection system, the power grid is monitored for disturbance accidents. If a disturbance accident occurs, the virtual power plant in the virtual power plant management layer receives the monitoring information and determines that the new power system is in an emergency state and transfers to the emergency dispatch agent of the virtual power plant; if no disturbance accident occurs, the virtual power plant receives the monitoring information and determines that the new power system is in a normal state. Based on the virtual power plant optimization dispatch agent, corresponding control is made according to different states, and corresponding instructions are sent to the internal site control layer;

[0020] Communication status judgment unit: The power and current controllers of photovoltaic, wind power and energy storage at the internal station control layer judge the communication status with the virtual power plant management layer based on the message information. When the communication is normal, the active and reactive power control within the station is performed according to the dispatch instructions; if the communication is interrupted, the power and current controllers of photovoltaic, wind power and energy storage perform active and reactive output control according to system requirements.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] Aiming at the characteristics of large-scale grid-connection of new power systems such as wind power and photovoltaic power, the present invention centrally manages and decentralized controls the diversified and integrated new energy, improves system operation efficiency, increases the safety and stability of the new power system, and enhances the grid's absorption capacity for new energy; it solves the shortcomings of new energy such as strong uncertainty, low inertia, weak anti-interference, low observability and low controllability, and organizes it into a grid-friendly, highly controllable resource that actively participates in regulation; it combines virtual power plant control with closed-loop control of the diversified and integrated wind, photovoltaic and storage new energy station end to improve the reliability of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of the method of the present invention;

[0024] Figure 2 It is the operation flow chart of the device of the present invention;

[0025] Figure 3 It is an upper-level scheduling architecture diagram based on a virtual power plant of the present invention;

[0026] Figure 4 This is the wind, solar and storage integrated control architecture diagram of the lower-level station of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0028] Example 1

[0029] like Figure 1-2 As shown, this embodiment provides a control method for a multi-integrated new energy station to participate in the safe and stable support of a new power system, and the method specifically includes the following steps:

[0030] Step 1) The control architecture based on the virtual power plant is as follows: Figure 3 As shown, the virtual power plant aggregates new energy sources such as wind, solar and storage and connects them to the new power system grid through a virtual public coupling point. The large power grid system is divided into centralized thermal power plants and virtual power plants that integrate multiple new energy sources such as wind, solar and storage, and manages them separately.

[0031] The control architecture of the lower-level stations within the common coupling point is as follows: Figure 4 As shown, the power and current controllers of the photovoltaic and wind power storage systems receive control instructions from the respective agents of the virtual power plant respectively. At the same time, when the control instructions cannot be received, the active power demand and reactive power demand are determined according to the frequency and voltage deviations of the new power system detected by the respective controllers, and the active power and reactive power output are controlled through closed-loop control.

[0032] Step 2), the outer layer is the large power grid control layer, which is mainly based on the wide area information collection system to uniformly control controllable resources such as virtual power plants and centralized power plants. The virtual power plant management layer adopts multi-agent technology, and interacts with the large power grid control layer through the information network to collect data and control instructions, and interacts at the physical level through the virtual public coupling point. The virtual power plant collects data to determine whether the new power system is in normal operation or emergency state, and sends the active and reactive control instructions to the control agents of each wind, solar and storage through the optimized dispatch agent or emergency agent. The specific steps are as follows:

[0033] (1) The large power grid control layer collects wide-area information;

[0034] (2) Determine whether a disturbance accident is detected;

[0035] (3) If no disturbance accident is detected, the outer layer normal operation strategy is executed, and corresponding control instructions are issued to the virtual power plant, centralized thermal power and other controllable resources. If a disturbance accident is detected, the outer layer emergency control strategy is executed, and corresponding control instructions are issued to the virtual power plant, centralized thermal power and other controllable resources.

[0036] (4) The virtual power plant management layer receives control instructions from the outer layer, that is, receives control instructions through the virtual coupling point, and determines whether the control instructions issued by the upper layer are control instructions under emergency conditions.

[0037] (5) If it is not an emergency control instruction, the virtual power plant optimizes the dispatching agent action and executes the internal normal operation strategy. If it is an emergency control instruction, the virtual power plant emergency dispatching agent action executes the internal emergency control strategy and sends control instructions to internal wind, solar, and storage and other new energy sources.

[0038] Step 3), each control agent of photovoltaic, wind power and energy storage receives the control signal of the upper virtual power plant and sends it to each controller. The controller determines whether it has received the control signal of the upper control agent. When the communication is normal, each controller receives the control signal of the control agent normally, and sends or absorbs the corresponding active and reactive power according to the control requirements; when the communication is abnormal, each controller cannot receive the control signal of the control agent, and the controller forms a closed-loop control based on the frequency and voltage deviation of the new power system collected from the grid connection point, and sends active and reactive power according to the needs of the new power system. The closed-loop control strategy is as follows:

[0039] (1) Wind turbine control method: The wind turbine adopts a doubly-fed induction motor, and its control method adopts a wind turbine control system and a doubly-fed induction motor integrated control system. The doubly-fed induction motor integrated control system is used to independently control the active and reactive power generated by the generator; it includes two control parts: one for rotor-side converter control and one for grid-side converter control. The control of the wind turbine consists of a speed controller and a pitch angle controller. The speed controller provides the converter active power reference value used to control the grid-connected power to the power controller of the doubly-fed generator rotor-side converter; when the wind speed exceeds the rated wind speed and the wind turbine active power exceeds its rated power, the pitch angle controller increases the pitch angle to limit the wind turbine active power, while the pitch angle is 0° under normal working conditions. For the reactive power control of the converter, the converter detects the difference between the grid voltage and the reference voltage through closed-loop control to determine the amount of reactive power output or absorption.

[0040] (2) Photovoltaic unit control method: Photovoltaic power generation system control is divided into two subsystems: photovoltaic control system and grid-connected inverter control system. The controller of the photovoltaic control system provides the grid-connected inverter active power reference value, and the inverter reactive power reference value is set to a certain value according to the system power factor requirement, generally set to 0. The power reference value is compared with the active and reactive power measurement values ​​on the grid side, and the inner loop current control reference value in the synchronous coordinate system is obtained through the outer loop power controller. The current control reference value and the grid-side current measurement value are used to obtain the inverter trigger pulse through the current controller. Combined with the phase-locked loop measurement technology, the inverter active and reactive power decoupling control and synchronous grid connection are realized.

[0041] (3) Energy storage control method: The overall control of energy storage includes two subsystems: the battery control system and the grid-connected inverter control system (including the U / F controller, the power controller and the current controller). The battery controller of the energy storage system detects the output status by monitoring the charging and discharging status of the battery, and when the active power reference value exceeds the active absorption and generation power limit of the battery group, the limit value is used as the active power reference value of the power controller. The voltage and frequency setting values ​​and measured values ​​of the grid-connected inverter control system are obtained through the U / F controller to obtain the active and reactive power reference values ​​of the power controller, and the reference value is provided for the inner loop current control through the adjustment of the active and reactive measurement values ​​of the power controller and the grid side. The inner loop current control of the inverter is consistent with the inner loop control method of the photovoltaic system.

[0042] Example 2

[0043] This embodiment provides a control device for a new power system in which multiple types of new energy sources are involved, which is composed of a coordinated control architecture establishment unit, a disturbance accident monitoring unit and a communication status judgment unit.

[0044] Coordinated control framework establishment unit: Establish a coordinated control framework for the participation of multiple integrated new energy sites in the safe and stable support of the new power system based on virtual power plants. The coordinated control framework includes a large power grid control layer as the outer layer, a virtual power plant management layer as the upper layer, and an internal site control layer as the lower layer. The upper and lower layers constitute the inner layer;

[0045] Disturbance accident monitoring unit: Based on the wide-area information collection system, the power grid is monitored for disturbance accidents. If a disturbance accident occurs, the virtual power plant in the virtual power plant management layer receives the monitoring information and determines that the new power system is in an emergency state and transfers to the emergency dispatch agent of the virtual power plant; if no disturbance accident occurs, the virtual power plant receives the monitoring information and determines that the new power system is in a normal state. Based on the virtual power plant optimization dispatch agent, corresponding control is made according to different states, and corresponding instructions are sent to the internal site control layer;

[0046] Communication status judgment unit: The power and current controllers of photovoltaic, wind power and energy storage at the internal station control layer judge the communication status with the virtual power plant management layer based on the message information. When the communication is normal, the active and reactive power control within the station is performed according to the dispatch instructions; if the communication is interrupted, the power and current controllers of photovoltaic, wind power and energy storage perform active and reactive output control according to the needs of the new power system.

[0047] In the coordinated control architecture establishment unit, the virtual power plant aggregates new energy and is connected to the new power system grid through a virtual public coupling point. The large power grid system is divided into a centralized thermal power plant and a virtual power plant with diversified integration of wind, solar and storage new energy, which are managed separately.

[0048] In the communication status judgment unit, the power and current controllers of photovoltaic, wind power and energy storage respectively receive control instructions issued by their respective agents of the virtual power plant. At the same time, when they cannot receive control instructions, they judge the active power demand and reactive power demand according to the frequency and voltage deviations of the new power system detected by their respective controllers, and perform active and reactive power output control through closed-loop control.

[0049] In the disturbance accident monitoring unit, as the outer large power grid control layer, the virtual power plant, centralized thermal power and other controllable resources are uniformly controlled based on the wide area information collection system;

[0050] The virtual power plant and the large power grid control layer interact with each other through the information network for data collection and control instructions, and interact at the physical level through the virtual common coupling point;

[0051] The virtual power plant management layer uses a multi-agent system, which consists of an emergency dispatch agent, an optimization dispatch agent, a photovoltaic agent, a wind power agent, and an energy storage agent at the site level. The dispatch agent centrally receives information from agents at the site level and issues control instructions. The site level agent monitors and uploads wind, solar, and energy storage power information and issues control instructions to the power and current controllers of photovoltaic, wind power, and energy storage.

[0052] The virtual power plant collects data to determine whether the new power system is in normal operation or emergency state, and sends active and reactive power control instructions to photovoltaic agents, wind power agents and energy storage agents through the optimization dispatch agent or emergency dispatch agent.

[0053] In the communication status judgment unit, each control agent of photovoltaic, wind power and energy storage receives the control signal of the upper virtual power plant, and sends it to each controller. The controller determines whether it has received the control signal of the upper control agent; when the communication is normal, each controller normally receives the control signal of the control agent, and sends or absorbs the corresponding active and reactive power according to the control requirements; when the communication is abnormal, each controller cannot receive the control signal of the control agent, and the controller forms an inner loop control signal according to the frequency and voltage deviation of the new power system collected by the grid connection point, and outputs the active and reactive power required by the new power system.

[0054] The above descriptions are only some embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A control method for a new power system with multi-integrated new energy sources, characterized in that: include: Step 1: Establish a coordinated control framework for the participation of multiple integrated new energy stations in the safe and stable support of the new power system based on virtual power plants. The coordinated control framework includes a large power grid control layer as the outer layer, a virtual power plant management layer as the upper layer, and an internal station control layer as the lower layer. The upper and lower layers constitute the inner layer. Step 2: Monitor whether a disturbance accident occurs in the power grid based on the wide area information collection system. If a disturbance accident occurs, the virtual power plant in the virtual power plant management layer receives the monitoring information and determines that the new power system is in an emergency state and transfers it to the emergency dispatch agent of the virtual power plant; If no disturbance accident occurs, the virtual power plant receives monitoring information and determines that the system is in a normal state. Based on the virtual power plant optimization dispatch agent, it makes corresponding controls according to different states and sends corresponding instructions to the internal station control layer; Step 3: The power and current controllers of photovoltaic, wind power and energy storage at the internal station control layer determine the dispatching communication status with the virtual power plant management layer according to the message information, and perform active and reactive power control within the station according to the dispatching instructions when the communication is normal; If communications are interrupted, the power and current controllers of photovoltaic, wind power and energy storage will control active and reactive output according to the requirements of the new power system.

2. The control method for the multi-integrated new energy participating in the new power system according to claim 1 is characterized in that: In step 1, the virtual power plant aggregates new energy and connects to the new power system grid through a virtual public coupling point. The grid system is divided into a centralized thermal power plant and a virtual power plant that integrates wind, solar and storage energy sources and manages them separately.

3. The control method for the multi-integrated new energy participating in the new power system according to claim 1 is characterized in that: In step 3, the power and current controllers of photovoltaic, wind power and energy storage respectively receive control instructions issued by their respective agents of the virtual power plant. When they are unable to receive control instructions, they determine the active and reactive power demands based on the frequency and voltage deviations of the new power system detected by their respective controllers, and perform active and reactive power output control through closed-loop control.

4. The control method for the multi-integrated new energy participating in the new power system according to claim 1 is characterized in that: In step 2, the large power grid control layer as the outer layer performs unified control of virtual power plants, centralized thermal power and other controllable resources based on the wide area information collection system; The virtual power plant and the large power grid control layer interact with each other through the information network for data collection and control instructions, and interact at the physical level through the virtual common coupling point; The virtual power plant management layer uses a multi-agent system, which consists of an emergency dispatch agent, an optimization dispatch agent, a photovoltaic agent, a wind power agent, and an energy storage agent at the site level. The dispatch agent centrally receives information from agents at the site level and issues control instructions. The site level agent monitors and uploads wind, solar, and energy storage power information and issues control instructions to the power and current controllers of photovoltaic, wind power, and energy storage. The virtual power plant collects data to determine whether the new power system is in normal operation or emergency state, and sends active and reactive power control instructions to photovoltaic agents, wind power agents and energy storage agents through the optimization dispatch agent or emergency dispatch agent.

5. The control method for the multi-integrated new energy participating in the new power system according to claim 1 is characterized in that: In step 3, each control agent of photovoltaic, wind power and energy storage receives the control signal of the upper virtual power plant and sends it to each controller. The controller determines whether it has received the control signal of the upper control agent. When the communication is normal, each controller normally receives the control signal of the control agent and sends or absorbs the corresponding active and reactive power according to the control requirements. When the communication is abnormal, each controller cannot receive the control signal of the control agent. The controller forms an inner loop control signal according to the frequency and voltage deviation of the new power system collected by the grid connection point, and outputs the active and reactive power required by the system.

6. A control device for a new power system with multiple integrated new energy sources, characterized in that: include: Coordinated control framework establishment unit: Establish a coordinated control framework for the participation of multiple integrated new energy sites in the safe and stable support of the new power system based on virtual power plants. The coordinated control framework includes a large power grid control layer as the outer layer, a virtual power plant management layer as the upper layer, and an internal site control layer as the lower layer. The upper and lower layers constitute the inner layer; Disturbance accident monitoring unit: monitors whether a disturbance accident occurs in the power grid based on the wide area information collection system. If a disturbance accident occurs, the virtual power plant in the virtual power plant management layer receives the monitoring information and determines that the new power system is in an emergency state and transfers it to the emergency dispatch agent of the virtual power plant; If no disturbance accident occurs, the virtual power plant receives monitoring information and determines that the new power system is in a normal state. Based on the virtual power plant optimization dispatch agent, it makes corresponding controls according to different states and sends corresponding instructions to the internal station control layer; Communication status judgment unit: The power and current controllers of photovoltaic, wind power and energy storage in the internal station control layer judge the communication status with the virtual power plant management layer according to the message information, and perform active and reactive power control in the station according to the dispatching instructions when the communication is normal; If communications are interrupted, the power and current controllers of photovoltaic, wind power and energy storage will control active and reactive output according to the requirements of the new power system.

7. The control device for the multi-integrated new energy participating in the new power system according to claim 6 is characterized in that: In the coordinated control architecture establishment unit, the virtual power plant aggregates new energy and is connected to the new power system grid through a virtual public coupling point. The large power grid system is divided into a centralized thermal power plant and a virtual power plant with diversified integration of wind, solar and storage new energy, which are managed separately.

8. The control device for the multi-integrated new energy participating in the new power system according to claim 6 is characterized in that: In the communication status judgment unit, the power and current controllers of photovoltaic, wind power and energy storage respectively receive control instructions issued by their respective agents of the virtual power plant. At the same time, when they cannot receive control instructions, they judge the active power demand and reactive power demand according to the frequency and voltage deviations of the new power system detected by their respective controllers, and perform active and reactive power output control through closed-loop control.

9. The control device for the multi-integrated new energy participating in the new power system according to claim 6 is characterized in that: In the disturbance accident monitoring unit, as the outer large power grid control layer, the virtual power plant, centralized thermal power and other controllable resources are uniformly controlled based on the wide area information collection system; The virtual power plant and the large power grid control layer interact with each other through the information network for data collection and control instructions, and interact at the physical level through the virtual common coupling point; The virtual power plant management layer uses a multi-agent system, which consists of an emergency dispatch agent, an optimization dispatch agent, a photovoltaic agent, a wind power agent, and an energy storage agent at the site level. The dispatch agent centrally receives information from agents at the site level and issues control instructions. The site level agent monitors and uploads wind, solar, and energy storage power information and issues control instructions to the power and current controllers of photovoltaic, wind power, and energy storage. The virtual power plant collects data to determine whether the new power system is in normal operation or emergency state, and sends active and reactive power control instructions to photovoltaic agents, wind power agents and energy storage agents through the optimization dispatch agent or emergency dispatch agent.

10. The control device for the multi-integrated new energy participating in the new power system according to claim 6 is characterized in that: In the communication status judgment unit, each control agent of photovoltaic, wind power and energy storage receives the control signal of the upper virtual power plant, and sends it to each controller. The controller determines whether it has received the control signal of the upper control agent; when the communication is normal, each controller normally receives the control signal of the control agent, and sends or absorbs the corresponding active and reactive power according to the control requirements; when the communication is abnormal, each controller cannot receive the control signal of the control agent, and the controller forms an inner loop control signal according to the frequency and voltage deviation of the new power system collected by the grid connection point, and outputs the active and reactive power required by the system.

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