CN216252190U

CN216252190U - Distributed photovoltaic-transformer substation source network coordinated voltage reactive controller

Info

Publication number: CN216252190U
Application number: CN202122588437.XU
Authority: CN
Inventors: 戈狄; 蔡之飞; 牛继涛
Original assignee: Xuchang Power Supply Co of Henan Electric Power Co
Current assignee: Xuchang Power Supply Co of Henan Electric Power Co
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-04-08
Anticipated expiration: 2031-10-27

Abstract

The utility model relates to a source network coordinated voltage reactive controller of a distributed photovoltaic-transformer substation, wherein a power module is used for converting an alternating current power supply, an astronomical clock is used for ensuring the clock synchronization of coordinated control between the distributed photovoltaic and the transformer substation, an analog quantity acquisition plug-in, a state quantity output plug-in, a serial port, an Ethernet interface, a storage plug-in and a liquid crystal operation panel are sequentially connected to a main circuit board through slots, wherein the analog quantity acquisition plug-in, the state quantity acquisition plug-in and the state quantity output plug-in can quickly acquire and control the real-time operation state of a connecting switch of the distributed photovoltaic and the transformer substation, the serial port can realize the communication connection between the main circuit board and a distributed photovoltaic inverter, and the Ethernet interface can ensure the real-time of voltage reactive control between the distributed photovoltaic and the transformer substation; the storage plug-in can be used for storing data, and the liquid crystal operation panel is used for carrying out operation control on the whole controller; the utility model has the advantages of reasonable structure and strong applicability.

Description

Distributed photovoltaic-transformer substation source network coordinated voltage reactive controller

Technical Field

The utility model belongs to the field of electric power systems, and particularly relates to a distributed photovoltaic-transformer substation source network coordinated voltage reactive power controller.

Background

The coordination controller is used as a core control device of the microgrid system, is a central link for connecting a microgrid energy management system and local devices such as a microgrid power supply, energy storage and load, and is mainly used for carrying out data acquisition, data processing, state monitoring and analysis, operation control, grid-on/off switching control and the like on the microgrid; the existing distributed photovoltaic or microgrid coordinated controller generally comprises an astronomical clock, a terminal server, an industrial switch, a router, an industrial personal computer and the like, is suitable for a single distributed photovoltaic or microgrid, is a local controller, can communicate with a remote energy management system, is mainly used for transmitting acquisition data or receiving control instructions with the remote energy management system, cannot realize real-time closed loop of transmitting acquisition data, generating and transmitting control instructions, and is not suitable for real-time voltage reactive coordination control between distributed photovoltaic and substations; therefore, in order to solve the above problems, it is necessary to develop a distributed photovoltaic-substation source grid coordinated voltage reactive controller with a reasonable structure and strong applicability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a distributed photovoltaic-substation source grid coordination voltage reactive power controller which is reasonable in structure and high in applicability.

The purpose of the utility model is realized as follows: a distributed photovoltaic-transformer substation source network coordinated voltage reactive controller comprises a main circuit board, a power module and an astronomical clock, wherein the power module is used for converting an alternating current power supply so as to provide a direct current power supply for the main circuit board and the astronomical clock, the main circuit board is electrically connected with the astronomical clock, and the astronomical clock is used for ensuring clock synchronization of coordinated control between the distributed photovoltaic and a transformer substation, a plurality of slots are arranged on the main circuit board, and an analog quantity acquisition plug-in, a state quantity output plug-in, a serial port and an Ethernet interface are sequentially connected through the slots, wherein the analog quantity acquisition plug-in and the state quantity acquisition plug-in can quickly acquire and detect grid-connected operation states of the distributed photovoltaic and voltage, current, active and reactive electric quantities of the distributed photovoltaic and transformer substation, and generate control instructions for a connection switch of the distributed photovoltaic and the transformer substation according to the acquisition and detection results, the state quantity output plug-in can transmit the control instruction to the connecting switch, thereby controlling the running state of the connecting switch; the serial port is connected with the inverter so as to realize communication between the main circuit board and the distributed photovoltaic inverter through the serial port, and the Ethernet interface is connected with an opposite-end transformer substation so as to ensure real-time voltage reactive power control between the distributed photovoltaic and the transformer substation.

The main circuit board is externally connected with a liquid crystal operation panel, and the whole controller is operated and controlled through the liquid crystal operation panel.

The main circuit board is provided with a storage plug-in, and the storage plug-in can be used for recording and storing voltage out-of-limit time and data of the distributed photovoltaic and the transformer substation.

The main circuit board is externally connected with an industrial switch, and the controller is in communication connection with the micro-grid network equipment through the industrial switch.

The utility model has the beneficial effects that: according to the utility model, a power module and an astronomical clock are arranged, a 220V alternating current power supply can be converted into a 24V direct current power supply suitable for a main circuit board and various plug-ins, the astronomical clock can be used for ensuring clock synchronization of coordinated control between distributed photovoltaic and a transformer substation, and an analog quantity acquisition plug-in and a state quantity acquisition plug-in are arranged, so that firstly, the grid-connected operation state of the distributed photovoltaic and the voltage, current, active power, reactive power and other electric quantities of the distributed photovoltaic can be obtained by the plug-in and the state quantity acquisition plug-in, secondly, a reactive power control instruction of a distributed photovoltaic inverter and a tap gear adjustment instruction of the transformer substation can be generated and issued by a control program of the main circuit board, and secondly, the voltage of the distributed photovoltaic and the transformer substation can be monitored by the plug-in, and if the voltage exceeds the limit and the duration time exceeds two hours, a control instruction of a connecting switch can be generated; the control instruction of the analog quantity acquisition plug-in and the control instruction of the state quantity acquisition plug-in to the connecting switch can be transmitted to the connecting switch by setting the state quantity output plug-in, so that the control of the running state of the connecting switch is realized, the communication connection between the main circuit board and the inverter can be realized by setting a serial port and by using the serial port, the communication connection between the main circuit board and an opposite-end transformer substation can be realized by setting an Ethernet interface, and the real-time performance of voltage reactive power control between the distributed photovoltaic and the transformer substation is ensured; in summary, the utility model has the advantages of reasonable structure and strong applicability.

Drawings

Fig. 1 is a schematic view showing the connection of the electric components in the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Example (b): as shown in fig. 1, a distributed photovoltaic-substation source-grid coordinated voltage reactive controller comprises a main circuit board, a power module and an astronomical clock, wherein the power module is used for converting an alternating current power supply so as to provide a direct current power supply for the main circuit board and the astronomical clock, the main circuit board is electrically connected with the astronomical clock, and the astronomical clock is used for ensuring clock synchronization of coordinated control between the distributed photovoltaic and the substation, a plurality of slots are arranged on the main circuit board, and an analog quantity acquisition plug-in, a state quantity output plug-in, a serial port and an ethernet interface are sequentially connected through the slots, wherein the analog quantity acquisition plug-in and the state quantity acquisition plug-in can rapidly acquire and detect grid-connected operation states of the distributed photovoltaic and grid-connected operation states thereof, voltage, current, active power and reactive power, and control instructions for a connection switch of the distributed photovoltaic and the substation are generated according to the acquisition and detection results, the state quantity output plug-in can transmit the output instruction to the connecting switch, thereby controlling the running state of the connecting switch; the serial port is connected with the inverter so as to realize the communication between the main circuit board and the distributed photovoltaic inverter through the serial port, and the Ethernet interface is connected with an opposite-end transformer substation so as to ensure the real-time performance of voltage reactive power control between the distributed photovoltaic and the transformer substation; the main circuit board is externally connected with a liquid crystal operation panel, and the whole controller is operated and controlled through the liquid crystal operation panel; the main circuit board is provided with a storage plug-in, and the storage plug-in can be used for recording and storing voltage out-of-limit time and data of the distributed photovoltaic and the transformer substation; the main circuit board is externally connected with an industrial switch, and the controller is in communication connection with the micro-grid network equipment through the industrial switch.

The utility model can convert 220V AC power supply into 24V DC power supply suitable for the main circuit board and each plug-in unit, can ensure the clock synchronization of the coordination control between the distributed photovoltaic and the transformer substation by using the astronomical clock, can realize the connection between the analog quantity acquisition plug-in unit, the state quantity output plug-in unit, the serial port, the Ethernet interface, the liquid crystal operation panel and the storage plug-in unit by using the slots by setting the analog quantity acquisition plug-in unit and the state quantity acquisition plug-in unit, firstly, can obtain the grid-connected operation state of the distributed photovoltaic and the voltage, current, active power, reactive power and other electric quantities thereof by using the slots, secondly, can generate and issue the reactive power control instruction of the distributed photovoltaic inverter and the tap gear adjustment instruction of the transformer substation by using the control program of the main circuit board, and can monitor the voltage of the distributed photovoltaic and the transformer substation by using the slots, if the voltage exceeds the limit and the duration time exceeds two hours, a control instruction for the connecting switch is generated; the control instruction of the analog quantity acquisition plug-in and the control instruction of the state quantity acquisition plug-in to the connecting switch can be transmitted to the connecting switch by setting the state quantity output plug-in, so that the control of the running state of the connecting switch is realized, the communication connection between the main circuit board and the inverter can be realized by setting the serial port, and the communication connection between the main circuit board and the opposite-end transformer substation can be realized by setting the Ethernet interface by using the serial port, so that the real-time performance of voltage reactive power control between the distributed photovoltaic and the transformer substation is ensured; the liquid crystal operation panel is arranged, so that an operator can conveniently use the liquid crystal operation panel to operate and control the whole controller, and the storage plug-in is arranged to record and store the voltage out-of-limit time and data of the distributed photovoltaic and the transformer substation; in summary, the utility model has the advantages of reasonable structure and strong applicability.

Claims

1. The utility model provides a distributed photovoltaic-transformer substation source network coordination voltage reactive controller, includes main circuit board, power module and astronomical clock, its characterized in that: the power supply module is used for converting an alternating current power supply so as to provide a direct current power supply for the main circuit board and the astronomical clock, the main circuit board is electrically connected with the astronomical clock, and the astronomical clock is used for ensuring the clock synchronization of the coordination control between the distributed photovoltaic and the transformer substation, a plurality of slots are arranged on the main circuit board, and is connected with an analog quantity acquisition plug-in, a state quantity output plug-in, a serial port and an Ethernet interface in sequence through the slot, wherein, the analog quantity acquisition plug-in and the state quantity acquisition plug-in can quickly acquire and detect the grid-connected operation state of the distributed photovoltaic and the voltage, current, active and reactive electric quantities thereof, generating a control instruction for the connecting switches of the distributed photovoltaic and the transformer substation according to the acquired and detected results, and transmitting the output instruction to the connecting switches by the state quantity output plug-in unit so as to control the running state of the connecting switches; the serial port is connected with the inverter so as to realize communication between the main circuit board and the distributed photovoltaic inverter through the serial port, and the Ethernet interface is connected with an opposite-end transformer substation so as to ensure real-time voltage reactive power control between the distributed photovoltaic and the transformer substation.

2. The distributed photovoltaic-substation source grid coordinated voltage reactive controller of claim 1, wherein: the main circuit board is externally connected with a liquid crystal operation panel, and the whole controller is operated and controlled through the liquid crystal operation panel.

3. The distributed photovoltaic-substation source grid coordinated voltage reactive controller of claim 1, wherein: the main circuit board is provided with a storage plug-in, and the storage plug-in can be used for recording and storing voltage out-of-limit time and data of the distributed photovoltaic and the transformer substation.

4. The distributed photovoltaic-substation source grid coordinated voltage reactive controller of claim 1, wherein: the main circuit board is externally connected with an industrial switch, and the controller is in communication connection with the micro-grid network equipment through the industrial switch.