CN111130141B - Switching controller for networking and isolated island operation of flexible direct current converter station - Google Patents
Switching controller for networking and isolated island operation of flexible direct current converter station Download PDFInfo
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- CN111130141B CN111130141B CN202010053643.8A CN202010053643A CN111130141B CN 111130141 B CN111130141 B CN 111130141B CN 202010053643 A CN202010053643 A CN 202010053643A CN 111130141 B CN111130141 B CN 111130141B
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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
Abstract
The invention discloses a switching controller for networking and island operation of a flexible direct current converter station, which comprises: the device comprises an information acquisition module and an operation mode judgment module; the information acquisition module is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller and sending the operation information to the operation mode judgment module; and the operation mode judgment module is used for receiving the operation information sent by the information acquisition module and sending an operation instruction to the networking operation controller and the island operation controller according to the operation information, so that the problem that the prior art has no effective control on the networking and island operation switching of the flexible direct current converter station is solved. The flexible direct-current transmission system can provide technical support for engineering design, scheduling operation and the like of the flexible direct-current transmission system, and safe and stable operation of the flexible direct-current transmission system is guaranteed.
Description
Technical Field
The application relates to the field of power system operation control, in particular to a switching controller for networking and island operation of a flexible direct current converter station.
Background
The flexible direct current transmission technology is taken as a novel direct current transmission technology based on a voltage source, and is considered to be an important means for enhancing the controllability and flexibility of a power transmission and distribution system, improving the operation stability and economy and improving the quality of power supply and electric energy due to the unique advantages of the flexible direct current transmission technology.
The flexible direct-current transmission technology based on the voltage source converter can be connected with an alternating-current power grid to operate, and at the moment, the flexible direct-current converter station operates in a networking mode; meanwhile, the voltage support can be provided for the passive network, so that the voltage support can be applied to the island access of new energy, the power generation access of the new energy is realized under the condition that no alternating current line is connected in parallel, and the flexible direct current converter station operates in an island mode at the moment. For the networking operation mode and the island operation mode, the flexible direct current converter station needs to adopt different control modes and controllers respectively, so that when the external operation condition changes, the flexible direct current converter station needs to be capable of realizing switching between the networking controller and the island controller, and effective control for networking and island operation switching of the flexible direct current converter station is not available at present.
Disclosure of Invention
The application provides a switching controller for flexible direct current converter station networking and isolated island operation, solves prior art and has not had the effective control problem to flexible direct current converter station networking, isolated island operation switch yet.
The application provides a switching controller that is used for flexible direct current converter station networking and island operation, includes: the device comprises an information acquisition module and an operation mode judgment module;
the information acquisition module is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller and sending the operation information to the operation mode judgment module;
and the operation mode judgment module is used for receiving the operation information sent by the information acquisition module and sending an operation instruction to the networking operation controller and the island operation controller according to the operation information.
Preferably, the information acquisition module is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller, and sending the operation information to the operation mode judgment module, and includes:
collecting AC voltage u of flexible DC convertor station, and networking line switch position F of networking operation controller K Switch close signal F C Networked operation controller state F L Islanding operation controller state F G The operation information of (1).
Preferably, the method further comprises the following steps:
F K =1 indicating the network line switch position is closed, F K =0 indicates that the networking line switch position is in the off state;
F C =1 indicates that the networking line switch position will switch from open to closed state;
F L =1 indicating the networked operation controller is in operation, F L =0 indicates that the networked operation controller is in an exit state;
F G =2 represents that the island operation controller is in operation state, F G =1 represents that the island operation controller is in a temporary commissioning state, F G And =0 represents that the island operation controller is in an exit state.
Preferably, the sending of the operation instruction to the networked operation controller and the islanding operation controller according to the operation information includes:
switching the island operation mode into a networking operation mode;
switching the networking operation mode into a temporary isolated island operation mode;
switching the temporary island operation mode into an island operation mode;
and switching the temporary island operation mode into a networking operation mode.
Preferably, the logic for determining to send the operation instruction to the networked operation controller and the isolated island operation controller according to the operation information includes:
if F C If the operation instruction is not less than 1, switching the island operation mode into the networking operation mode;
if the AC voltage u is lower than the set threshold u of the controller min And F is G ＝0、F L If the operation mode is not equal to 1, sending an operation instruction, and switching the networking operation mode into a temporary isolated island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K If the current time is not less than 0, sending an operation instruction to switch the temporary island operation mode to the island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K And if the operation instruction is not less than 1, the temporary isolated island operation mode is switched to the networking operation mode.
Preferably, after the step of sending the operation instruction, the operation mode determining module further includes:
if the operation instruction sent by the operation mode judging module is that the island operation mode is switched to the networking operation mode, the controller is switched to the networking operation controller from the island operation controller, the networking operation controller is set to be in an operation state, and the island operation controller is set to be in an exit state;
if the operation instruction sent by the operation mode judging module is that the networking operation mode is switched to a temporary island operation mode, the controller is switched to an island operation controller from a networking operation controller, the networking operation controller is set to be in a quit state, and the island operation controller is set to be in a temporary commissioning state;
if the operation instruction sent by the operation mode judging module is that, the temporary island operation mode is switched to an island operation mode, if the operation instruction sent by the operation mode judging module is that, the controller is kept as an island operation controller, and the island operation controller is set to be in a commissioning state;
if the operation instruction sent by the operation mode judging module is that the temporary isolated island operation mode is switched to the networking operation mode, the controller is switched to the networking operation controller by the isolated island operation controller, the networking operation controller is set to be in an operation state, and the isolated island operation controller is set to be in an exit state.
The application provides a switching controller that is used for flexible direct current converter station networking and island operation, includes: the system comprises an information acquisition module and an operation mode judgment module; the information acquisition module is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller and sending the operation information to the operation mode judgment module; and the operation mode judgment module is used for receiving the operation information sent by the information acquisition module and sending an operation instruction to the networking operation controller and the island operation controller according to the operation information, so that the problem that the prior art has no effective control on the networking and island operation switching of the flexible direct current converter station is solved.
Drawings
Fig. 1 is a schematic diagram of a switching controller for networking and islanding a flexible dc converter station according to the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit and scope of this application, and thus this application is not limited to the specific implementations disclosed below.
The application provides a switching controller that is used for flexible direct current converter station networking and island operation, includes: the information acquisition module and the operation mode judgment module are shown in figure 1, and the composition and the control logic of the switching controller are shown in figure 1. The switching controller provided by the application is described in detail below with reference to fig. 1.
The switching controller comprises an information acquisition module which is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller and sending the operation information to the operation mode judgment module;
and the operation mode judgment module is used for receiving the operation information sent by the information acquisition module and sending an operation instruction to the networking operation controller and the island operation controller according to the operation information.
The information collected by the information collection module specifically comprises: collecting AC voltage u of flexible DC convertor station and networking circuit switch position F of networking operation controller K Switch close signal F C Networked operation controller state F L Islanding operation controller state F G The running information of (c), etc. Wherein, the first and the second end of the pipe are connected with each other,
F K =1 indicating the network line switch position is closed, F K =0 indicates that the networking line switch position is in the off state;
F C =1 indicates that the networking line switch position is to be switched from the open state to the closed state;
F L =1 denotes the networked operation controller is in operation, F L =0 indicates that the networked operation controller is in an exit state;
F G =2 denotes that the islanding operation controller is in operation, F G =1 denotes that the island operation controller is in a temporary operation state, F G And =0 represents that the island operation controller is in an exit state.
The operation mode judging module sends an operation instruction to a networking operation controller and an island operation controller according to the operation information, and the operation mode judging module comprises the following steps:
instruction 1, switching an island operation mode into a networking operation mode;
instruction 2, switching the networking operation mode into a temporary isolated island operation mode;
instruction 3, switching the temporary island operation mode into an island operation mode;
and 4, switching the temporary isolated island operation mode to a networking operation mode.
The specific logic for judging the operation instruction is that,
if F C ＝1，Then sending an operation instruction to switch the island operation mode into a networking operation mode;
if the AC voltage u is lower than the set threshold u of the controller min And F is G ＝0、F L If the operation mode is not equal to 1, sending an operation instruction, and switching the networking operation mode into a temporary isolated island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K If the current time is not less than 0, sending an operation instruction to switch the temporary island operation mode to the island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K And if the operation instruction is not less than 1, the temporary isolated island operation mode is switched to the networking operation mode.
After the operation instruction is sent out, if the operation instruction sent by the operation mode judging module is that the island operation mode is switched to the networking operation mode, the controller is switched to the networking operation controller from the island operation controller, the networking operation controller is set to be in an operation state, and the island operation controller is set to be in an exit state;
if the operation instruction sent by the operation mode judging module is that the networking operation mode is switched to a temporary isolated island operation mode, the controller is switched to an isolated island operation controller from the networking operation controller, the networking operation controller is set to be in an exit state, and the isolated island operation controller is set to be in a temporary commissioning state;
if the operation instruction sent by the operation mode judging module is that the temporary island operation mode is switched to the island operation mode, if the operation instruction sent by the operation mode judging module is that the operation instruction is that the controller is kept as an island operation controller, and the island operation controller is set to be in a commissioning state;
if the operation instruction sent by the operation mode judging module is that the temporary isolated island operation mode is switched to the networking operation mode, the controller is switched to the networking operation controller by the isolated island operation controller, the networking operation controller is set to be in an operation state, and the isolated island operation controller is set to be in an exit state.
The application provides a switching controller that is used for flexible direct current converter station networking and island operation, includes: the device comprises an information acquisition module and an operation mode judgment module; the information acquisition module is used for acquiring the operation information of the flexible direct current converter station, the networking operation controller and the island operation controller and sending the operation information to the operation mode judgment module; and the operation mode judgment module is used for receiving the operation information sent by the information acquisition module and sending an operation instruction to the networking operation controller and the island operation controller according to the operation information, so that the problem that the prior art has no effective control on the networking and island operation switching of the flexible direct current converter station is solved. Technical support can be provided for engineering design, scheduling operation and the like of the flexible direct current transmission power system, and safe and stable operation of the flexible direct current transmission power system is guaranteed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (2)
1. A switching controller for networking and islanding operation of a flexible dc converter station, comprising: the device comprises an information acquisition module and an operation mode judgment module;
the information acquisition module is used for gathering the operating information of flexible direct current converter station, networking operation controller and island operation controller, includes: collecting AC voltage u of flexible DC convertor station and networking circuit switch position F of networking operation controller K Switch close signal F C Networked operation controller state F L Islanding operation controller state F G The operation information of (2);
F K =1 indicating the network line switch position is closed, F K =0 means that the networking line switch position is off; f C =1 indicates that the networking line switch position will switch from open to closed state; f L =1 denoting networked operation controlThe system is in operation, F L =0 indicates that the networking operation controller is in the exit state; f G =2 represents that the island operation controller is in operation state, F G =1 denotes that the island operation controller is in a temporary operation state, F G =0 represents that the island operation controller is in an exit state;
sending the operation information to an operation mode judgment module;
the operation mode judging module receives the operation information sent by the information acquisition module and sends an operation instruction to the networking operation controller and the island operation controller according to the operation information, and the operation instruction comprises the following steps:
switching the island operation mode into a networking operation mode;
switching the networking operation mode into a temporary isolated island operation mode;
switching the temporary island operation mode into an island operation mode;
switching the temporary island operation mode into a networking operation mode;
if F C If the operation instruction is not less than 1, switching the island operation mode into the networking operation mode;
if the AC voltage u is lower than the set threshold u of the controller min And F is G ＝0、F L If the operation mode is not equal to 1, sending an operation instruction to switch the networking operation mode into a temporary isolated island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K If the current time is not less than 0, sending an operation instruction to switch the temporary island operation mode to the island operation mode;
if F G =1 duration exceeding a set threshold t min And F is K And if the operation instruction is not less than 1, the temporary isolated island operation mode is switched to the networking operation mode.
2. The handover controller according to claim 1, further comprising, after the step of sending the operation command by the operation mode determining module:
if the operation instruction sent by the operation mode judging module is that the island operation mode is switched to the networking operation mode, the controller is switched to the networking operation controller from the island operation controller, the networking operation controller is set to be in an operation state, and the island operation controller is set to be in an exit state;
if the operation instruction sent by the operation mode judging module is that the networking operation mode is switched to a temporary island operation mode, the controller is switched to an island operation controller from a networking operation controller, the networking operation controller is set to be in a quit state, and the island operation controller is set to be in a temporary commissioning state;
if the operation instruction sent by the operation mode judging module is that the temporary island operation mode is switched to the island operation mode, if the operation instruction sent by the operation mode judging module is that the operation instruction is that the controller is kept as an island operation controller, and the island operation controller is set to be in a commissioning state;
if the operation instruction that the operation mode judge module sent does, interim isolated island operation mode switches into networking operation mode, then the controller is switched into networking operation controller by isolated island operation controller, and networking operation controller sets up to put into operation the state, and isolated island operation controller sets up to the exit state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053643.8A CN111130141B (en) | 2020-01-17 | 2020-01-17 | Switching controller for networking and isolated island operation of flexible direct current converter station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010053643.8A CN111130141B (en) | 2020-01-17 | 2020-01-17 | Switching controller for networking and isolated island operation of flexible direct current converter station |
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| CN111130141A CN111130141A (en) | 2020-05-08 |
| CN111130141B true CN111130141B (en) | 2022-10-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904677B (en) * | 2014-03-27 | 2015-09-23 | 浙江大学 | The method for handover control of a kind of VSC-HVDC between networking and decoupled mode |
| CN104659807B (en) * | 2014-11-21 | 2017-05-17 | 深圳供电局有限公司 | Method for on-line seamless grid connection of MMC type flexible direct current converter |
| CN104485683B (en) * | 2014-12-23 | 2018-07-06 | 南京南瑞继保电气有限公司 | A kind of isolated island turns networking method |
| CN104578128B (en) * | 2014-12-23 | 2017-09-29 | 南京南瑞继保电气有限公司 | A kind of flexible direct current power transmission system isolated island turns the switching method of networking |
| CN104578187B (en) * | 2015-01-04 | 2016-11-30 | 南方电网科学研究院有限责任公司 | A kind of Multi-end flexible direct current transmission system level cooperative control device |
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