CN215733513U - An auxiliary frequency regulation system based on new energy power generation technology in power plants - Google Patents

An auxiliary frequency regulation system based on new energy power generation technology in power plants Download PDF

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CN215733513U
CN215733513U CN202121439125.6U CN202121439125U CN215733513U CN 215733513 U CN215733513 U CN 215733513U CN 202121439125 U CN202121439125 U CN 202121439125U CN 215733513 U CN215733513 U CN 215733513U
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power generation
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generation equipment
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高峰
兀鹏越
孙钢虎
寇水潮
柴琦
王小辉
杨沛豪
马晋辉
孙梦瑶
张立松
潘乐宏
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
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Abstract

本实用新型公开了一种基于发电厂新能源发电技术的辅助调频系统，包括220kV高压母线、主变压器、集散控制系统DCS、远程终端单元RTU、功率测量装置、发电机、高压厂用变压器、6kV厂用电母线、升压变压器和新能源发电设备及新能源控制系统，燃煤发电机经功率测量装置与主变压器、高压厂用变压器相连，主变压器通过第一开关与220kV高压母线相连，高压厂用变压器通过第二开关与6kV厂用电母线相连，6kV厂用电母线通过第三开关与升压变压器高压侧相连，升压变压器低压侧和新能源发电设备相连；集散控制系统DCS与新能源控制系统建立通讯连接参与机组AGC，有效提高电厂对AGC指令响应的速度，辅助机组调频，满足电网考核指标的要求，增加发电企业的经济效。

Figure 202121439125

The utility model discloses an auxiliary frequency regulation system based on new energy power generation technology in power plants, comprising a 220kV high-voltage bus, a main transformer, a distributed control system DCS, a remote terminal unit RTU, a power measuring device, a generator, a high-voltage factory transformer, a 6kV The plant power bus, step-up transformer, new energy power generation equipment and new energy control system, the coal-fired generator is connected to the main transformer and the high-voltage plant transformer through the power measuring device, and the main transformer is connected to the 220kV high-voltage bus through the first switch. The plant transformer is connected to the 6kV plant power bus through the second switch, the 6kV plant power bus is connected to the high-voltage side of the booster transformer through the third switch, and the low-voltage side of the booster transformer is connected to the new energy power generation equipment; The energy control system establishes a communication connection to participate in the AGC of the units, which effectively improves the speed of the power plant's response to the AGC command, assists the frequency regulation of the units, meets the requirements of the power grid assessment indicators, and increases the economic efficiency of the power generation enterprise.

Figure 202121439125

Description

Auxiliary frequency modulation system based on power plant new energy power generation technology
Technical Field
The utility model belongs to the field of frequency modulation of power plant units, and particularly relates to an auxiliary frequency modulation system based on a new energy power generation technology of a power plant.
Background
With the continuous increase of the new energy proportion, the wind power consumption pressure is continuously increased, and the large-scale grid connection of wind power obviously increases the AGC frequency modulation requirement of a power grid. In addition, a large number of thermal power generating units bear heavy AGC adjustment tasks for a long time, and a series of negative effects such as high coal consumption in power generation, serious equipment abrasion and the like are caused. The existing power frequency modulation resources cannot meet the large-scale grid-connected requirement of renewable energy sources, and with the economic development and the improvement of the complexity of a power grid, the contradiction is more prominent, and the safe and stable operation of the whole power grid is influenced.
The new energy power generation equipment controls the power of the new energy power generation equipment in real time through the control system (11), and has the advantages of high response speed, accurate control and the like. Some thermal power plant factory electrical systems have accessed new energy power generation equipment, such as photovoltaic systems, but the power control systems of the thermal power plant factory electrical systems and the power plant DCS do not establish communication and can not participate in unit AGC.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an auxiliary frequency modulation system based on a new energy power generation technology of a power plant, aiming at the problems that the existing plant service accessed new energy power generation equipment cannot participate in the AGC of a unit and cannot help the unit to improve the frequency modulation performance.
The utility model is realized by adopting the following technical scheme:
an auxiliary frequency modulation system based on a new energy power generation technology of a power plant comprises a 220kV high-voltage bus, a main transformer, a power measuring device, a power generator, a high-voltage station transformer, a 6kV station bus, a step-up transformer, new energy power generation equipment and a new energy control system; wherein,
the generator is connected with a main transformer and a high-voltage station transformer through a power measuring device, the main transformer is connected with a 220kV high-voltage bus through a first switch, the high-voltage station transformer is connected with a 6kV station bus through a second switch, the 6kV station bus is connected with the high-voltage side of a step-up transformer through a third switch, the low-voltage side of the step-up transformer is connected with the new energy power generation equipment, and a new energy control system is used for automatically adjusting the power generation power of the new energy monomer power generation equipment according to instructions, so that the whole power generation power of the new energy power generation equipment is controlled.
The utility model is further improved in that the new energy power generation equipment consists of photovoltaic power generation equipment and wind power generation equipment.
The utility model is further improved in that the system also comprises a Distributed Control System (DCS), the DCS is in communication connection with a power measuring device, and the power measuring device transmits a power signal of the generator to the DCS.
The utility model is further improved in that the distributed control system DCS establishes communication connection with the generator, and sends power instructions to the generator.
The utility model is further improved in that the distributed control system DCS and the new energy control system establish bidirectional communication connection, the new energy control system transmits a power signal of the new energy power generation equipment to the distributed control system DCS, and the distributed control system DCS transmits the power of the generator to the new energy control system.
The utility model has the further improvement that the system also comprises a remote terminal unit RTU, a distributed control system DCS and the remote terminal unit RTU establish bidirectional communication connection, the distributed control system DCS transmits a total power signal of the unit to the remote terminal unit RTU, the total power signal of the unit is the sum of the power of a generator and the power of new energy power generation equipment, and the remote terminal unit RTU transmits the total power signal of the unit to a dispatching center; and the dispatching center enters the new energy control system to transmit an AGC command to the distributed control system DCS through the remote terminal unit RTU.
The utility model has the further improvement that the unit normally operates, the new energy power generation equipment is accessed into a plant power utilization system of the unit and participates in AGC frequency modulation of the unit, and the first switch, the second switch and the third switch are in a closed position; the unit and the new energy power generation equipment participate in unit AGC, a dispatching center sends AGC instructions to a Distributed Control System (DCS) and a new energy control system through a Remote Terminal Unit (RTU), if the AGC instructions are load increasing instructions, the Distributed Control System (DCS) sends load increasing instructions to the generator, the new energy control system sends power generation increasing instructions to each single power generation equipment in the new energy power generation equipment, the power of the new energy power generation equipment is rapidly increased, and the sum of the power increasing instructions of the generator and the new energy power generation equipment is always kept consistent with the AGC load increasing instructions; if the AGC instruction is a load reduction instruction, the distributed control system DCS sends the load reduction instruction to the generator, the new energy control system sends a power generation reduction instruction to each single power generation device in the new energy power generation device, the power of the new energy power generation device is rapidly reduced, and the sum of the power reduction of the generator and the power reduction of the new energy power generation device is always kept consistent with the AGC load reduction instruction.
The utility model has the further improvement that the unit normally operates, when the new energy power generation equipment stops operating, the new energy power generation equipment is disconnected with the auxiliary power system and does not participate in unit AGC, the first switch and the second switch are in a closed position, and the third switch (202) is in a separated position; the unit participates in AGC frequency modulation, the dispatching center sends an AGC instruction to the distributed control system DCS through the remote terminal unit RTU, and the distributed control system DCS sends a load increasing and decreasing instruction to the generator, so that the load increasing and decreasing of the generator are always consistent with the AGC load increasing and decreasing instruction.
The utility model has at least the following beneficial technical effects:
the new energy system for the auxiliary power of the existing system does not establish communication with a remote terminal unit RTU and a unit distributed control system DCS, cannot participate in unit AGC, and cannot assist a generator to participate in frequency modulation. According to the auxiliary frequency modulation system based on the new energy power generation technology of the power plant, the new energy power generation equipment is provided with the new energy control system, the remote terminal unit RTU and the distributed control system DCS are communicated, the power of the new energy power generation equipment and the unit are controlled to jointly participate in AGC, the response speed of the power plant to an AGC instruction is effectively increased, the frequency modulation of the unit is assisted, the requirement of a power grid evaluation index is met, and the economic benefit of a power generation enterprise is increased.
Drawings
Fig. 1 is a schematic diagram of an auxiliary frequency modulation system of a new energy power generation technology of a power plant.
Fig. 2 is a schematic diagram of the auxiliary frequency modulation operation of the new energy power generation technology of the power plant.
Fig. 3 is a schematic diagram of the shutdown operation of the new energy power generation technology of the power plant.
Description of reference numerals:
the system comprises 1-220kV high-voltage bus, 2-main transformer, 3-distributed control system DCS, 4-remote terminal unit RTU, 5-power measuring device, 6-generator, 7-high-voltage station transformer, 8-6kV station bus, 9-step-up transformer, 10-new energy power generation equipment and 11-new energy control system.
101-a first switch, 201-a second switch, 202-a third switch.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the auxiliary frequency modulation system based on the new energy power generation technology of the power plant provided by the utility model comprises a 220kV high-voltage bus 1, a main transformer 2, a distributed control system DCS3, a remote terminal unit RTU4, a power measurement device 5, a generator 6, a high-voltage service transformer 7, a 6kV service bus 8, a step-up transformer 9, a new energy control system 11, and a new energy power generation device 10; the generator 6 is connected with the main transformer 2 and the high-voltage station transformer 7 through the power measuring device 5, the main transformer 2 is connected with the 220kV high-voltage bus 1 through the first switch 101, the high-voltage station transformer 7 is connected with the 6kV station bus 8 through the second switch 201, the 6kV station bus 8 is connected with the high-voltage side of the boosting transformer 9 through the third switch 202, and the low-voltage side of the boosting transformer 9 is connected with the new energy power generation equipment 10 through the new energy control system 11.
The working principle of the utility model is as follows:
the distributed control system DCS3 and the power measuring device 5 establish communication connection, and the power measuring device 5 transmits a power signal of the generator to the distributed control system DCS 3; the distributed control system DCS3 establishes communication connection with the generator 6, and the distributed control system DCS3 sends a power instruction to the generator; the distributed control system DCS3 establishes bidirectional communication connection with the new energy control system 11, the new energy control system 11 transmits a power signal of new energy power generation equipment to the distributed control system DCS3, and the distributed control system DCS3 transmits power of a generator to the new energy control system 11; the distributed control system DCS3 and the remote terminal unit RTU4 establish bidirectional communication connection, the distributed control system DCS3 transmits a total power signal of a unit to the remote terminal unit RTU4, the total power signal of the unit is the sum of the power of a generator and the power of new energy generating equipment, and the remote terminal unit RTU4 transmits the total power signal of the unit to a dispatching center; and the dispatching center transmits AGC commands to the distributed control system DCS3 and the new energy control system 11 through a remote terminal unit RTU 4.
As shown in fig. 2, when the unit normally operates, and the new energy power generation device normally operates, the new energy power generation device accesses to the plant power utilization system and participates in AGC frequency modulation of the unit, and the first switch 101, the second switch 201 and the third switch 202 are in a closed position; the unit and the new energy power generation equipment participate in unit AGC, a dispatching center sends AGC commands to a distributed control system DCS3 and a new energy control system 11 through a remote terminal unit RTU4, if the AGC commands are load increasing commands, the distributed control system DCS3 sends load increasing commands to the generator 6, the new energy control system 11 sends power increasing commands to each power generation equipment of the new energy power generation equipment, the power generation power of the new energy power generation equipment is rapidly increased, and the sum of the power increasing commands of the generator and the new energy power generation equipment is always kept consistent with the AGC load increasing commands; if the AGC instruction is a load reduction instruction, the distributed control system DCS3 sends the load reduction instruction to the generator 6, the new energy control system 11 sends a power reduction instruction to each power generation device of the new energy power generation device, the power of the new energy power generation device is rapidly reduced, and the sum of the power reduction of the generator and the power increase of the new energy power generation device is always kept consistent with the AGC load reduction instruction.
As shown in fig. 3, when the unit normally operates and the new energy power generation equipment stops operating, the new energy power generation equipment is disconnected from the auxiliary power system and does not participate in the AGC of the unit, the first switch 101 and the second switch 201 are in a closed position, and the third switch 202 is in a separated position; the unit participates in AGC frequency modulation, the dispatching center sends an AGC command to a distributed control system DCS3 through a remote terminal unit RTU4, and the distributed control system DCS3 sends a load increase and decrease command to the generator 6, so that the load increase and decrease of the generator are always kept with the AGC increase and decrease.

Claims (5)

1.一种基于发电厂新能源发电技术的辅助调频系统，其特征在于，包括220kV高压母线(1)、主变压器(2)、集散控制系统DCS(3)、功率测量装置(5)、发电机(6)、高压厂用变压器(7)、6kV厂用电母线(8)、升压变压器(9)、新能源发电设备(10)和新能源控制系统(11)；其中，1. An auxiliary frequency modulation system based on new energy power generation technology in power plants, characterized in that it comprises a 220kV high-voltage bus (1), a main transformer (2), a distributed control system DCS (3), a power measurement device (5), a power generation machine (6), high-voltage factory transformer (7), 6kV factory power bus (8), step-up transformer (9), new energy power generation equipment (10) and new energy control system (11); wherein, 发电机(6)经功率测量装置(5)与主变压器(2)、高压厂用变压器(7)相连，主变压器(2)通过第一开关(101)与220kV高压母线(1)相连，高压厂用变压器(7)通过第二开关(201)与6kV厂用电母线(8)相连，6kV厂用电母线(8)通过第三开关(202)与升压变压器(9)高压侧相连，升压变压器(9)低压侧与新能源发电设备(10)相连，新能源控制系统(11)用于根据指令自动调节新能源单体发电设备发电功率，从而控制新能源发电设备(10)整体发电功率；The generator (6) is connected to the main transformer (2) and the high-voltage factory transformer (7) through the power measuring device (5), and the main transformer (2) is connected to the 220kV high-voltage bus (1) through the first switch (101). The factory transformer (7) is connected to the 6kV factory power busbar (8) through the second switch (201), and the 6kV factory power busbar (8) is connected to the high voltage side of the step-up transformer (9) through the third switch (202), The low-voltage side of the step-up transformer (9) is connected to the new energy power generation equipment (10), and the new energy control system (11) is used for automatically adjusting the power generation of the new energy single power generation equipment according to the instruction, thereby controlling the whole new energy power generation equipment (10) power generation; 集散控制系统DCS(3)和功率测量装置(5)建立通讯连接，功率测量装置(5)向集散控制系统DCS(3)传输发电机功率信号；集散控制系统DCS(3)与发电机(6)建立通讯连接，集散控制系统DCS(3)向发电机发送功率指令；集散控制系统DCS(3)与新能源控制系统(11)建立双向通讯连接，新能源控制系统(11)向集散控制系统DCS(3)传输新能源发电设备功率信号，集散控制系统DCS(3)向新能源控制系统(11)传输发电机功率。The distributed control system DCS (3) establishes a communication connection with the power measurement device (5), and the power measurement device (5) transmits a generator power signal to the distributed control system DCS (3); the distributed control system DCS (3) communicates with the generator (6). ) establishes a communication connection, the distributed control system DCS (3) sends power commands to the generator; the distributed control system DCS (3) establishes a two-way communication connection with the new energy control system (11), and the new energy control system (11) sends the power command to the distributed control system. The DCS (3) transmits the power signal of the new energy power generation equipment, and the distributed control system DCS (3) transmits the generator power to the new energy control system (11). 2.根据权利要求1所述的一种基于发电厂新能源发电技术的辅助调频系统，其特征在于，新能源发电设备(10)由光伏发电设备及风力发电设备组成。2 . An auxiliary frequency regulation system based on new energy power generation technology in power plants according to claim 1 , wherein the new energy power generation equipment (10) is composed of photovoltaic power generation equipment and wind power generation equipment. 3 . 3.根据权利要求1所述的一种基于发电厂新能源发电技术的辅助调频系统，其特征在于，还包括远程终端单元RTU(4)，集散控制系统DCS(3)和远程终端单元RTU(4)建立双向通讯连接，集散控制系统DCS(3)向远程终端单元RTU(4)传输机组总功率信号，机组总功率信号为发电机功率和新能源发电设备功率的和，远程终端单元RTU(4)将机组总功率信号发送至调度中心；调度中心通过远程终端单元RTU(4)向集散控制系统DCS(3)进入新能源控制系统(11)传输AGC指令。3. A kind of auxiliary frequency regulation system based on new energy generation technology of power plant according to claim 1, is characterized in that, also comprises remote terminal unit RTU (4), distributed control system DCS (3) and remote terminal unit RTU ( 4) Establish a two-way communication connection, the distributed control system DCS (3) transmits the total power signal of the unit to the remote terminal unit RTU (4), and the total power signal of the unit is the sum of the generator power and the power of the new energy power generation equipment. The remote terminal unit RTU ( 4) Send the total power signal of the unit to the dispatch center; the dispatch center transmits the AGC command to the distributed control system DCS (3) into the new energy control system (11) through the remote terminal unit RTU (4). 4.根据权利要求3所述的一种基于发电厂新能源发电技术的辅助调频系统，其特征在于，机组正常运行，新能源发电设备(10)正常运行时，新能源发电设备(10)接入机组厂用电系统并参与机组AGC调频，第一开关(101)、第二开关(201)和第三开关(202)在合位；机组和新能源发电设备(10)参与机组AGC，调度中心经远程终端单元RTU(4)向集散控制系统DCS(3)、新能源控制系统(11)发送AGC指令，若AGC指令为增负荷指令，集散控制系统DCS(3)向发电机(6)发送增负荷指令，新能源控制系统(11)向新能源发电设备(10)内各个单体发电设备发送增加发电功率指令，快速增加新能源发电设备(10)功率，使发电机增加功率与新能源发电设备增加功率之和始终保持与AGC增负荷指令一致；若AGC指令为减负荷指令，集散控制系统DCS(3)向发电机(6)发送减负荷指令，新能源控制系统(11)向新能源发电设备(10)内各个单体发电设备发送减少发电功率指令，快速减少新能源发电设备功率，使发电机减少功率与新能源发电设备(10)减少功率之和始终保持与AGC减负荷指令一致。4. A kind of auxiliary frequency regulation system based on new energy power generation technology of power plant according to claim 3, it is characterized in that, when the unit is in normal operation, when the new energy power generation equipment (10) is in normal operation, the new energy power generation equipment (10) is connected The first switch (101), the second switch (201) and the third switch (202) are in the combined position; the unit and the new energy power generation equipment (10) participate in the AGC of the unit, dispatch The center sends the AGC command to the distributed control system DCS (3) and the new energy control system (11) via the remote terminal unit RTU (4). If the AGC command is a load increase command, the distributed control system DCS (3) sends the generator (6). Sending a load increase command, the new energy control system (11) sends an increase power generation command to each single power generation device in the new energy power generation device (10), so as to rapidly increase the power of the new energy power generation device (10), so that the increased power of the generator is compatible with the new energy. The sum of the increased power of the energy generating equipment is always consistent with the AGC load increasing command; if the AGC command is a load shedding command, the distributed control system DCS (3) sends a load shedding command to the generator (6), and the new energy control system (11) sends a load shedding command to the generator (6). Each single power generation equipment in the new energy power generation equipment (10) sends a command to reduce the power generation power to rapidly reduce the power of the new energy power generation equipment, so that the sum of the reduced power of the generator and the reduced power of the new energy power generation equipment (10) always maintains the load reduction with the AGC The instructions are consistent. 5.根据权利要求3所述的一种基于发电厂新能源发电技术的辅助调频系统，其特征在于，机组正常运行，新能源发电设备(10)停运时，新能源发电设备(10)与厂用电系统断开，不参与机组AGC，第一开关(101)和第二开关(201)在合位，第三开关(202)在分位；机组参与AGC调频，调度中心经远程终端单元RTU(4)向集散控制系统DCS(3)发送AGC指令，集散控制系统DCS(3)向发电机(6)发送增减负荷指令，使发电机增减负荷始终保持与AGC增减负荷指令一致。5. A kind of auxiliary frequency regulation system based on new energy power generation technology of power plant according to claim 3, is characterized in that, when the unit is in normal operation, when the new energy power generation equipment (10) is out of operation, the new energy power generation equipment (10) and the The power system of the plant is disconnected and does not participate in the AGC of the unit. The first switch (101) and the second switch (201) are in the combined position, and the third switch (202) is in the sub-position; the unit participates in the AGC frequency regulation, and the dispatch center passes through the remote terminal unit. The RTU (4) sends an AGC command to the distributed control system DCS (3), and the distributed control system DCS (3) sends an increase or decrease load command to the generator (6), so that the increase or decrease of the generator load is always consistent with the AGC increase or decrease load command. .
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113300415A (en) * 2021-06-25 2021-08-24 西安热工研究院有限公司 Auxiliary frequency modulation system based on power plant new energy power generation technology

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113300415A (en) * 2021-06-25 2021-08-24 西安热工研究院有限公司 Auxiliary frequency modulation system based on power plant new energy power generation technology

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