High-capacity optical storage cluster coordinated control system

Abstract

The invention relates to a high-capacity optical storage cluster cooperative control system, and belongs to the technical field of optical storage, and the high-capacity optical storage cluster cooperative control system comprises a plurality of pooling stations, cooperative control slave machines with the number corresponding to that of the pooling stations, and a cooperative control host machine. The pooling station comprises a plurality of optical storage power generation units, all the optical storage power generation units in the pooling station are connected with the coordinated control slave machines corresponding to the pooling station, and all the coordinated control slave machines are connected with the coordinated control host. The method can improve the reliability of new energy grid connection, improve the utilization hours of the whole station, optimize the coordination processing of the optical storage system, improve the quality of output electric energy, achieve the centralized control and unified scheduling of each optical storage power generation unit at the station level, achieve the response synchronization and contribution balance of the single power generation units, and achieve the maximization of the adjustment capability of the whole station. Therefore, the station has the integrated synchronous power generation characteristic.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic storage technology, and in particular to a high-capacity photovoltaic storage cluster cooperative control system. Background Art

[0002] As an important support for the development of new energy, in recent years, all types of energy storage installations have achieved growth, especially new energy storage has maintained a rapid growth rate, and flexible resources such as energy storage have become an important way to promote the consumption of new energy. At present, the strong allocation of energy storage to photovoltaic power stations has become the current industry development trend. At present, photovoltaic power stations are mainly distributed, that is, the energy storage system is dispersed on the AC / DC side of each photovoltaic sub-array. The configuration capacity of a single energy storage system generally does not exceed 3.15 megawatt-hours, while the capacity of large photovoltaic stations generally ranges from hundreds of megawatts to gigawatts. That means that a single photovoltaic station has at least dozens or even hundreds of photovoltaic storage power generation units. The traditional control method is to dispatch and issue power generation plans to the station AGC (automatic power generation control system), and the AGC system issues them to each photovoltaic storage power generation unit.

[0003] However, this method only issues the same target value to each power generation unit on average, without taking into account the operating conditions of different power generation units, such as photovoltaic module type, bracket type, energy storage SOC value, etc., and the actual power generation output will inevitably deviate; and the traditional control system only issues overall target values ​​for the photovoltaic storage power generation unit and does not participate in the coordinated control of photovoltaic energy storage, which will also cause deviations in power generation. The superposition of multiple outputs will cause parallel resonance of each power generation unit, thereby reducing the power quality of the entire station output and reducing the reliability of power supply.

[0004] Therefore, it is necessary to provide a new high-capacity optical storage cluster cooperative control system to solve the above technical problems. Summary of the invention

[0005] The purpose of the present disclosure is to provide a high-capacity photovoltaic storage cluster coordinated control system in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A high-capacity photovoltaic storage cluster cooperative control system includes multiple collection stations, a number of cooperative control slaves corresponding to the collection stations, and a cooperative control host; the collection station includes multiple photovoltaic storage power generation units, all of the photovoltaic storage power generation units in the collection station are connected to the cooperative control slaves corresponding to the collection station, and all of the cooperative control slaves are connected to the cooperative control host.

[0008] As a further optimization solution of the present disclosure, the aggregation station also includes a primary switch, all the photovoltaic power generation units in the aggregation station are connected to the primary switch, and the primary switch is connected to the auxiliary control slave corresponding to the aggregation station.

[0009] As a further optimization solution of the present disclosure, the photovoltaic power generation unit communicates with the cooperative control slave machine via optical fiber GOOSE.

[0010] As a further optimization solution of the present disclosure, the co-control host and the co-control slave establish communication through a GOOSE control network.

[0011] As a further optimization solution of the present disclosure, the GOOSE control network adopts a dual network configuration.

[0012] As a further optimization solution of the present disclosure, a secondary switch is also included, all the auxiliary control slaves are connected to the secondary switch, and the secondary switch is connected to the auxiliary control host.

[0013] As a further optimization scheme of the present disclosure, it also includes a secondary sub-switches and a secondary main switch corresponding to the number of the co-control slaves, each of the co-control slaves is connected to the secondary sub-switch, all the secondary sub-switches are connected to the secondary main switch, and the secondary main switch is connected to the co-control host.

[0014] As a further optimization solution of the present disclosure, the co-control host is connected to the host computer to receive control instructions from the host computer.

[0015] As a further optimization solution of the present disclosure, the co-control host communicates with the host computer through the station control layer MMS network.

[0016] As a further optimization solution of the present disclosure, the host computer is an energy management system EMS, a data acquisition and monitoring control system SCADA or a telecontrol device.

[0017] The beneficial effects of the present disclosure are:

[0018] The present disclosure can improve the reliability of new energy grid connection, increase the utilization hours of the entire station, optimize the coordinated processing of the photovoltaic storage system, improve the output power quality, realize the centralized control and unified dispatch of each photovoltaic storage power generation unit at the station level, realize the synchronous response and balanced contribution of the single power generation unit, maximize the regulation capacity of the entire station, and make the station present the characteristics of integrated synchronous power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of a scenario with many aggregation stations in an embodiment of the present disclosure;

[0020] Figure 2 It is a schematic diagram of the system structure in a scenario with fewer aggregation stations in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] like Figure 1 As shown, a high-capacity photovoltaic storage cluster cooperative control system includes multiple collection stations, a corresponding number of cooperative control slaves and a cooperative control host; the collection station includes multiple photovoltaic storage power generation units, all of the photovoltaic storage power generation units in the collection station are connected to the cooperative control slaves corresponding to the collection station, and all of the cooperative control slaves are connected to the cooperative control host.

[0023] The aggregation station also includes a primary switch, all the photovoltaic power generation units in the aggregation station are connected to the primary switch, and the primary switch is connected to the corresponding auxiliary control slave of the aggregation station.

[0024] The photovoltaic power generation unit communicates with the auxiliary control slave through optical fiber GOOSE; the auxiliary control host and the auxiliary control slave establish communication through the GOOSE control network, and the GOOSE control network adopts a dual-network configuration.

[0025] A high-capacity optical storage cluster cooperative control system further includes a secondary secondary switch corresponding to the number of the cooperative control slaves and a secondary main switch, each of the cooperative control slaves is connected to the secondary secondary switch, all the secondary secondary switches are connected to the secondary main switch, and the secondary main switch is connected to the cooperative control host. This scenario of multiple secondary secondary switches is suitable for the case where there are many aggregation stations, and the number of cooperative control slaves cannot be connected to the cooperative control host through one switch.

[0026] like Figure 2 As shown, if the number of aggregation stations is small, a high-capacity optical storage cluster cooperative control system also includes a secondary switch, all the cooperative control slaves are connected to the secondary switch, and the secondary switch is connected to the cooperative control host.

[0027] The co-control host is connected to the host computer and receives control instructions from the host computer. The co-control host communicates with the host computer through the station control layer MMS network. The host computer is an energy management system EMS, a data acquisition and monitoring control system SCADA or a telecontrol device.

[0028] In this embodiment, the present disclosure proposes a networking topology structure of a high-capacity photovoltaic storage cluster cooperative control system. Through the unified scheduling and control of the cluster, centralized control and unified scheduling of each photovoltaic storage power generation unit at the site level can be achieved, and the response synchronization and contribution balance of the individual power generation units can be achieved, the regulation capacity of the entire station is maximized, and the site presents an integrated synchronous power generation characteristic.

[0029] In this embodiment, a 50MW collection line is equipped with a coordination control device slave, and the entire station is equipped with a coordination control device master, thereby forming a photovoltaic storage cluster coordination control system.

[0030] In the photovoltaic storage cluster coordination control system, the cooperative control host collects the switch information, voltage and current information of the entire station grid connection point; the cooperative control slave collects the switch information, voltage and current information of the 50MW collection station collector line. Optical fiber GOOSE communication is used between the cooperative control host and the cooperative control slave, and optical fiber GOOSE communication is used between the cooperative control slave and the photovoltaic storage synchronous power generation unit. Similarly, the control device of the photovoltaic storage cluster cooperative control system is also connected to the MMS network of the entire station monitoring system, which can receive the control of the energy management system EMS / data acquisition and monitoring control system SCADA system, and can also be connected with the automatic generation control AGC / automatic voltage control AVC system and power prediction system.

[0031] The cluster cooperative control system is mainly configured on the upper layer of the photovoltaic power generation unit and the lower layer of the host computer. It can receive the control instructions of the host computer and quickly coordinate and control a large number of photovoltaic power generation units. Among them, the host computer can be an energy management system (EMS), other controllers, and telecontrol devices. The host computer and the cluster cooperative control system communicate through the station control layer communication network to transmit four remote information. The dispatching agency of the power grid sends instructions to the telecontrol device in the station, and then forwards the instructions to the cluster cooperative control system.

[0032] The cluster cooperative control system is composed of multiple coordination controllers in the form of hierarchical networking, and forms a GOOSE fast control network with the photovoltaic storage power generation unit through optical fiber. The communication delay reaches the millisecond level, and it has system-level control functions in various application scenarios, such as: active power control (AGC), reactive power control (AVC), primary frequency modulation, inertia response, dynamic voltage regulation, off-grid black start, multi-machine SOC balancing control, etc.

[0033] The high-capacity photovoltaic storage cluster cooperative control system disclosed in the present invention adopts a layered distributed architecture, which mainly includes: a cooperative control host and a cooperative control slave. Both the cooperative control host and the cooperative control slave can adopt a dual-machine redundant configuration to increase the reliability of the system; the cooperative control host and several cooperative control slaves establish communication through the GOOSE control network, and the GOOSE control network can adopt a dual-network configuration. The cluster coordination control system is connected to the station control layer MMS network upward to receive control instructions from the SCADA system; it establishes communication with the photovoltaic storage power generation unit downward through the GOOSE control network. The cooperative control host device receives instructions from the EMS and remote motors, and sends instructions to the cooperative control slave device. The cooperative control host device controls the output power of the photovoltaic storage power generation unit.

[0034] The high-capacity photovoltaic storage cluster cooperative control system provided by the present disclosure can achieve output balance of each photovoltaic storage power generation unit in the photovoltaic station, avoid the problem of parallel oscillation of multiple machines, thereby ensuring the quality of output power and participating in various auxiliary services of the power system.

[0035] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. A high-capacity optical storage cluster coordinated control system, characterized in that: It includes multiple collection stations, a number of cooperative control slaves corresponding to the collection stations, and a cooperative control host; the collection station includes multiple photovoltaic storage power generation units, all of the photovoltaic storage power generation units in the collection station are connected to the cooperative control slaves corresponding to the collection station, and all of the cooperative control slaves are connected to the cooperative control host.

2. A high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: The aggregation station also includes a primary switch, all the photovoltaic power generation units in the aggregation station are connected to the primary switch, and the primary switch is connected to the corresponding auxiliary control slave of the aggregation station.

3. The high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: The photovoltaic power generation unit communicates with the cooperative control slave via optical fiber GOOSE.

4. The high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: The co-control host and the co-control slave establish communication via the GOOSE control network.

5. A high-capacity optical storage cluster cooperative control system according to claim 4, characterized in that: The GOOSE control network adopts a dual network configuration.

6. The high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: It also includes a secondary switch, all the auxiliary control slaves are connected to the secondary switch, and the secondary switch is connected to the auxiliary control host.

7. The high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: It also includes a secondary secondary switch and a secondary main switch corresponding to the number of the auxiliary control slaves, each of the auxiliary control slaves is connected to the secondary secondary switch, all the secondary secondary switches are connected to the secondary main switch, and the secondary main switch is connected to the auxiliary control host.

8. The high-capacity optical storage cluster cooperative control system according to claim 1, characterized in that: The co-control host is connected to the host computer and receives control instructions from the host computer.

9. A high-capacity optical storage cluster cooperative control system according to claim 8, characterized in that: The co-control host communicates with the host computer via the station control layer MMS network.

10. The high-capacity optical storage cluster cooperative control system according to claim 8, characterized in that: The host computer is an energy management system EMS, a data acquisition and monitoring control system SCADA or a telecontrol device.

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