CN110212583A - The control method of Distribution Network Failure distributed generation resource off-the-line linkage - Google Patents
The control method of Distribution Network Failure distributed generation resource off-the-line linkage Download PDFInfo
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- CN110212583A CN110212583A CN201910555055.1A CN201910555055A CN110212583A CN 110212583 A CN110212583 A CN 110212583A CN 201910555055 A CN201910555055 A CN 201910555055A CN 110212583 A CN110212583 A CN 110212583A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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Abstract
Description
技术领域technical field
本发明属于电力系统故障处理领域，具体地说，尤其涉及一种配网故障分布式电源解列联动的控制方法。The invention belongs to the field of power system fault handling, and in particular relates to a control method for de-serialization and linkage of distributed power sources with distribution network faults.
背景技术Background technique
随着人类对环境污染问题以及节能问题的口益关注，风能、太阳能等可再生能源发电技术正逐渐发展，分布式发电(Distributed Generation，DG)技术成为国内外研究的热点。分布式电源具有供电灵活、安装方便、环保等优点，通常DG靠近用户端来增强负荷端供电的可靠性，同时可保证其电能质量。但随着DG数量以及渗透率的越来越大，现有的防孤岛运行保护模式已经暴露出一些不足之处，例如需要增强对系统备用容量的要求，无法合理利用DG的发电容量，容易导致共模跳闸，引起配电网的供电可靠性下降等。As human beings pay more and more attention to environmental pollution and energy-saving issues, wind energy, solar energy and other renewable energy power generation technologies are gradually developing, and distributed generation (Distributed Generation, DG) technology has become a research hotspot at home and abroad. Distributed power supply has the advantages of flexible power supply, convenient installation, and environmental protection. Usually, DG is close to the user end to enhance the reliability of power supply at the load end, and at the same time ensure its power quality. However, with the increasing number and penetration of DGs, the existing anti-islanding operation protection mode has exposed some shortcomings, such as the need to increase the requirements for system reserve capacity and the inability to reasonably utilize the power generation capacity of DGs, which may easily lead to Common mode tripping causes the power supply reliability of the distribution network to drop.
发明内容Contents of the invention
本发明的目的在于克服上述缺陷，提供一种配网故障分布式电源解列联动的控制方法，其通过分布式电源主动解列后进行孤岛运行，大大提升了系统供电的可靠性和安全性。The purpose of the present invention is to overcome the above-mentioned defects, and provide a control method for the decoupling and linkage of distributed power sources in distribution network faults, which performs island operation after active decoupling of distributed power sources, greatly improving the reliability and safety of system power supply.
所述的配网故障分布式电源解列联动的控制方法，包括以下步骤：The control method for the disaggregation and linkage of distributed power sources for distribution network faults includes the following steps:
(1)含DG的配电网并网运行，并采集配电网的数据；(1) The distribution network containing DG is connected to the grid, and the data of the distribution network is collected;
(2)测量含DG的配电网各节点的电压、电流和频率，并与解列数据对比；(2) Measure the voltage, current and frequency of each node of the distribution network containing DG, and compare with the split data;
(3)步骤(2)中的电压、电流和频率满足解列条件时，储能设备正常运行；(3) When the voltage, current and frequency in step (2) meet the unloading conditions, the energy storage device operates normally;
(4)储能设备由PQ控制方式转为V/F控制；(4) The energy storage equipment is changed from PQ control mode to V/F control mode;
(5)设储能设备额定输出功率为PBESSo，微燃机额定功率为PMTo，负荷总功率为Pload，Ppcc为母线上的交换功率，储能设备吸收功率为PRESS；Ppcc+PRESS≦PBESSo时，进行解列，然后孤岛运行；(5) Suppose the rated output power of the energy storage equipment is PBESSo, the rated power of the micro-turbine is PMTo, the total load power is Pload, Ppcc is the switching power on the bus, and the absorbed power of the energy storage equipment is PRESS; when Ppcc+PRESS≦PBESSo, Disassemble and run in isolation;
(6)步骤(5)中，Ppcc+PRESS﹥PBESSo时，先进行孤岛划分，再进行解列；(6) In step (5), when Ppcc+PRESS>PBESSo, island division is performed first, and then decoupling is performed;
(7)步骤(2)中的电压、电流和频率无法满足解列条件时，通过微燃机进行V/F控制；(7) When the voltage, current and frequency in step (2) cannot meet the unloading conditions, the V/F control is carried out through the micro-combustion engine;
(8)步骤(7)中，Ppcc≦PMTo时，进行解列，然后孤岛运行；(8) In step (7), when Ppcc≦PMTo, perform de-loading, and then run in isolation;
(9)步骤(7)中，Ppcc﹥PMTo时，先进行孤岛划分，再进行解列。(9) In step (7), when Ppcc>PMTo, island division is performed first, and then splitting is performed.
进一步地，所述微燃机的额定电压为10kV，额定频率为50Hz，额定输出功率为1MVA，额定功率因素为0.8。Further, the rated voltage of the micro-combustion engine is 10kV, the rated frequency is 50Hz, the rated output power is 1MVA, and the rated power factor is 0.8.
进一步地，所述配电网的额定电压为110kV，额定频率为50Hz，最大短路容量为10000MVA，最小短路容量8000MVA。Further, the rated voltage of the distribution network is 110kV, the rated frequency is 50Hz, the maximum short-circuit capacity is 10000MVA, and the minimum short-circuit capacity is 8000MVA.
进一步地，所述储能设备电池的额定电压为lOkV，额定频率为50Hz，额定容量为1250kWh，额度功率为5MW，额定功率因素为0.8。Further, the rated voltage of the battery of the energy storage device is 10kV, the rated frequency is 50Hz, the rated capacity is 1250kWh, the rated power is 5MW, and the rated power factor is 0.8.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1、DG具有独立供电的能力，故障隔离之后，利用DG恢复部分重要负荷的供电，显著提高了系统的供电可靠性；1. DG has the ability of independent power supply. After the fault is isolated, use DG to restore the power supply of some important loads, which significantly improves the power supply reliability of the system;
2、本发明以储能设备或者微燃机为单主电源，满足了含分布式电源的配电网孤岛运行时控制系统能支撑配电网频率和电压、调节配电网功率平衡的要求，并充分发挥不同分布式电源的各自优势，构建一个含分布式电源的配电网主动解列控制方法。2. The present invention uses energy storage equipment or a micro gas turbine as a single main power supply, which meets the requirements that the control system can support the frequency and voltage of the distribution network and adjust the power balance of the distribution network when the distribution network with distributed power is running in an isolated manner. And give full play to the respective advantages of different distributed power sources, and construct an active decoupling control method for distribution network with distributed power sources.
附图说明Description of drawings
图1为本发明的原理图。Fig. 1 is a schematic diagram of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明作进一步说明：The present invention will be further described below in conjunction with accompanying drawing:
如图1所示，配网故障分布式电源解列联动的控制方法，包括以下步骤：As shown in Figure 1, the control method for the decoupling and linkage of distributed power generation in distribution network faults includes the following steps:
(1)含DG的配电网并网运行，并采集配电网的数据；(1) The distribution network containing DG is connected to the grid, and the data of the distribution network is collected;
(2)测量含DG的配电网各节点的电压、电流和频率，并与解列数据对比；(2) Measure the voltage, current and frequency of each node of the distribution network containing DG, and compare with the split data;
(3)步骤(2)中的电压、电流和频率满足解列条件时，储能设备正常运行；(3) When the voltage, current and frequency in step (2) meet the unloading conditions, the energy storage device operates normally;
(4)储能设备由PQ控制方式转为V/F控制；(4) The energy storage equipment is changed from PQ control mode to V/F control mode;
(5)设储能设备额定输出功率为PBESSo，微燃机额定功率为PMTo，负荷总功率为Pload，Ppcc为母线上的交换功率，储能设备吸收功率为PRESS；Ppcc+PRESS≦PBESSo时，进行解列，然后孤岛运行；(5) Suppose the rated output power of the energy storage equipment is PBESSo, the rated power of the micro-turbine is PMTo, the total load power is Pload, Ppcc is the switching power on the bus, and the absorbed power of the energy storage equipment is PRESS; when Ppcc+PRESS≦PBESSo, Disassemble and run in isolation;
(6)步骤(5)中，Ppcc+PRESS﹥PBESSo时，先进行孤岛划分，再进行解列；(6) In step (5), when Ppcc+PRESS>PBESSo, island division is performed first, and then decoupling is performed;
(7)步骤(2)中的电压、电流和频率无法满足解列条件时，通过微燃机进行V/F控制；(7) When the voltage, current and frequency in step (2) cannot meet the unloading conditions, the V/F control is carried out through the micro-combustion engine;
(8)步骤(7)中，Ppcc≦PMTo时，进行解列，然后孤岛运行；(8) In step (7), when Ppcc≦PMTo, perform de-loading, and then run in isolation;
(9)步骤(7)中，Ppcc﹥PMTo时，先进行孤岛划分，再进行解列。(9) In step (7), when Ppcc>PMTo, island division is performed first, and then splitting is performed.
本发明在使用时，微燃机的额定电压为10kV，额定频率为50Hz，额定输出功率为1MVA，额定功率因素为0.8；配电网的额定电压为110kV，额定频率为50Hz，最大短路容量为10000MVA，最小短路容量8000MVA；储能设备电池的额定电压为lOkV，额定频率为50Hz，额定容量为1250kWh，额度功率为5MW，额定功率因素为0.8。When the present invention is in use, the rated voltage of the micro-turbine is 10kV, the rated frequency is 50Hz, the rated output power is 1MVA, and the rated power factor is 0.8; the rated voltage of the distribution network is 110kV, the rated frequency is 50Hz, and the maximum short-circuit capacity is 10000MVA, the minimum short-circuit capacity is 8000MVA; the rated voltage of the energy storage device battery is 10kV, the rated frequency is 50Hz, the rated capacity is 1250kWh, the rated power is 5MW, and the rated power factor is 0.8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259169A (en) * | 2009-04-22 | 2010-11-11 | Mitsubishi Electric Corp | Protective relay device |
| CN108667133A (en) * | 2018-05-17 | 2018-10-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Main power source switching method, apparatus and system |
| CN109842148A (en) * | 2018-02-01 | 2019-06-04 | 大全集团有限公司 | A kind of micro-grid connection turns the stable control method of isolated operation mode |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259169A (en) * | 2009-04-22 | 2010-11-11 | Mitsubishi Electric Corp | Protective relay device |
| CN109842148A (en) * | 2018-02-01 | 2019-06-04 | 大全集团有限公司 | A kind of micro-grid connection turns the stable control method of isolated operation mode |
| CN108667133A (en) * | 2018-05-17 | 2018-10-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Main power source switching method, apparatus and system |
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