CN202840677U - Excitation device for improving reliability of excitation system of pumped storage unit - Google Patents
Excitation device for improving reliability of excitation system of pumped storage unit Download PDFInfo
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- CN202840677U CN202840677U CN 201220565823 CN201220565823U CN202840677U CN 202840677 U CN202840677 U CN 202840677U CN 201220565823 CN201220565823 CN 201220565823 CN 201220565823 U CN201220565823 U CN 201220565823U CN 202840677 U CN202840677 U CN 202840677U
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- 230000005284 excitation Effects 0.000 title claims abstract description 146
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000000977 initiatory effect Effects 0.000 claims description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002964 excitative effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses an excitation device for improving reliability of an excitation system of a pumped storage unit. The excitation device comprises a direct-current excitation device and an alternating-current excitation device and adopts a primary direct-current excitation way and an auxiliary alternating-current excitation way; under a normal condition, a direct-current excitation loop and a direct-current storage battery system adopt the direction-current excitation way during a normal working process; and when the direct-current excitation loop has faults and an alternating-current system for auxiliary power normally work, the direction-current excitation way is manually switched to the alternating-current excitation way to implement external alternating-current assisted excitation. The direct-current excitation way and the alternating-current excitation way can be switched by simply modifying control logic inside an excitation system regulator without an extra alternating-current power supply, so that the cost is low, and the switching is convenient to implement. The excitation device adopts the alternating-current excitation way to ensure the normal excitation of the excitation system on the condition that the direct-current excitation loop of the excitation system has faults, but the auxiliary power is normal.
Description
Technical field
The utility model belongs to pumped storage unit power supply unit scope, particularly a kind of excitation unit that improves the excitation system of pumped storage unit reliability.To utilize excitation system alternating current excitation initiating device as the stand-by equipment of direct current excitation mode specifically, to solve excitation system of pumped storage unit in the situation that direct current excitation mode lost efficacy, adopt the alternating current excitation initiating mode, guaranteed to be in the pumped storage unit of load center, performance peak regulation, frequency modulation and emergency episode standby functions with transferring with rising.
Background technology
In big-and-middle-sized pumped storage unit, the excitation system of generator extensively adopts Automatical Silicon Controlled Rectifier Exciting Unit.And the excitation of excitation system can be generator normal boot-strap build press crucial.The mode of at present thyristor excited system excitation has two kinds: a kind of is that the excitation power supply directly utilizes the generator residual pressure excitation, and another kind is that to utilize the generator residual pressure excitation be primary, and the excitation of external power magnetic assist is for subsequent use, is called it and encourages.For the small generator of low pressure unit, all adopt residual voltage excitation mode, namely directly take out remanent magnetism voltage as the excitation power supply from generator.Single-machine capacity is more than 800kW, and machine end rated voltage is the generator of high pressure, then adopts it to encourage the excitation mode.Because though this class generator also has certain residual voltage by remanence, but conversion is to the secondary side of rectifier transformer ZB, numerical value is very little, before the generator excitation, can't produce the pulse signal that is enough to make controlled silicon conducting, controllable silicon is in off state, excitation system can not provide exciting curent for the rotor winding, and generator voltage can not be set up, so, thyristor excitation device all will install external power excitation unit additional, builds this road program of pressure to help generator to finish excitation when starting shooting.
Adopt external power excitation mode, namely utilize external dc power, directly give the rotor winding excitatory, be increased at generator voltage and can make the controllable silicon triggering and conducting, when whole excitation system enters normal operating conditions, add the excitation power supply and namely withdraw from.Usually, outside excitation power supply has two kinds of modes, and a kind of by the excitation power supply of batteries as generator, this mode need to increase the capacity of storage battery; Another kind is rectified into corresponding DC power supply as the excitation power supply of generator by the station-service AC power.Ming Tombs, Beijing accumulation of energy power plant is located in Beijing, capital, be positioned at the load center of North China Power Telecommunication Network, undertaking the North China Power Telecommunication Network peak regulation, the important function that frequency modulation and emergency episode are for subsequent use, although can be guaranteed to cause generator alternating current excitation initiating to lose power supply and can not excitation put into operation in the complete obiteration of station-service AC power as generator excitation excitation mode by storage battery, power supply in emergency circumstances but electrical network needs again to start shooting immediately, unit can generate electricity immediately start guarantee unit with transferring with rising, but this kind excitation mode is not perfectly safe yet, go wrong etc. under the abnormal conditions such as direct current excitation switch fault or cable such as breaking down at the direct current excitation initiating circuit, this excitation unit lost efficacy, therefore for excitation system, should possess simultaneously the alternating current excitation initiating device as for subsequent use, the reliability of guarantee excitation system.
The utility model content
The purpose of this utility model is for the current load center that is located in, the excitation unit of undertaking peak regulation, frequency modulation and emergency episode excitation system of pumped storage unit for subsequent use breaks down at the direct current excitation initiating circuit and goes wrong such as direct current excitation switch fault or cable etc. under the abnormal conditions, the deficiency that this excitation unit lost efficacy easily, a kind of excitation unit that improves the excitation system of pumped storage unit reliability is proposed, it is characterized in that excitation unit is comprised of excitation AC and DC power supply, AC and DC excitation switch, exciting power cabinet, field switch and excitation transformer; The output process divider resistance 5 of direct current excitation power supply 3 is connected with direct current excitation switch 1, DC excitation switch 1 is connected with generator 8 rotors; Alternating current excitation initiating power supply 4 links to each other with generator amature 8 through transformer 9, alternating current excitation initiating switch 2, controllable silicon 6, field switch 7; Generator end shunt transformer 10.
Described direct current excitation power supply is 220V100A.
Described alternating current excitation initiating power supply is 10.5KV 50HZ.
Described exciting power cabinet is rectifier.
Two kinds of excitation modes of this excitation unit of the beneficial effects of the utility model employing are a kind of to be the direct current excitation, and another kind is alternating current excitation initiating, and take the direct current excitation as main, alternating current excitation initiating is auxiliary; Under normal circumstances, namely the direct current excitation initiating circuit, when the direct-flow storage battery system works is normal, adopt direct current excitation mode; When direct current excitation initiating circuit fault and station service AC system were working properly, the people carried out the excitation of external communication magnetic assist for cutting to exchanging the excitation mode.Do not need to increase extra AC power, only the control logic of need simple modification excitation system adjuster inside can realize the switching of AC/DC excitation mode again, and cost is low, and it is convenient to realize.After guaranteeing that excitation system direct current excitation initiating circuit breaks down, in the normal situation of station service, adopt the alternating current excitation initiating mode, guarantee that excitation system can normal excitation
Description of drawings
Fig. 1 is excitation primary system figure.
Embodiment
The utility model proposes a kind of excitation unit that improves the excitation system of pumped storage unit reliability.Be explained below in conjunction with accompanying drawing.
Figure 1 shows that excitation primary system figure, among the figure, direct current excitation power supply 3(220V100A) output through divider resistance 5 be connected with direct current excitation switch 1, DC excitation switch 1 is connected with generator amature 8; Alternating current excitation initiating power supply (10.5KV 50HZ) 4 links to each other with generator amature 8 through transformer 9, alternating current excitation initiating switch 2, controllable silicon 6, field switch 7; Generator end shunt transformer 10.
Under normal circumstances, during the start of pumped storage unit generation, adopt direct current excitation mode namely to utilize outside direct current excitation power supply 3 directly excitatory to the rotor winding through divider resistance 5, direct current excitation switch 1, be increased at generator voltage and can make controllable silicon 6 triggering and conducting, field power supply switches to Generator end shunt transformer 10, when whole excitation system entered normal operating conditions, external dc excitation switch 1 disconnected, and direct current excitation power supply withdraws from.After breaking down in the DC excitation loop, the people is the parameter of the alternating current-direct current excitation mode of adjuster inside for a change, after selecting the parameter of alternating current excitation initiating mode, the control flow of field regulator will carry out according to the flow process of alternating current excitation initiating after beginning to carry out, namely utilize experiment power supply to pass through transformer 9, alternating current excitation initiating (test) switch 2, controllable silicon 6, field switch 7 adds to generator amature 8, after generator voltage is increased to certain numerical value, alternating current excitation initiating power supply 4 switches to Generator end shunt transformer 10, when whole excitation system enters normal operating conditions, add the alternating current excitation initiating switch and disconnect, the alternating current excitation initiating power supply withdraws from.
Claims (4)
1. an excitation unit that improves the excitation system of pumped storage unit reliability is characterized in that, excitation unit is comprised of excitation AC and DC power supply, AC and DC excitation switch, exciting power cabinet, field switch and excitation transformer; The output process divider resistance (5) of direct current excitation power supply (3) is connected with direct current excitation switch (1), DC excitation switch (1) is connected with generator (7) rotor; Alternating current excitation initiating power supply (4) links to each other with generator amature (8) through transformer (9), alternating current excitation initiating switch (2), controllable silicon (6), field switch (7); Generator end shunt transformer (10).
2. the excitation unit of described raising excitation system of pumped storage unit reliability according to claim 1 is characterized in that described direct current excitation power supply is 220V100A.
3. the excitation unit of described raising excitation system of pumped storage unit reliability according to claim 1 is characterized in that described alternating current excitation initiating power supply is 10.5KV 50HZ.
4. the excitation unit of described raising excitation system of pumped storage unit reliability according to claim 1 is characterized in that described exciting power cabinet is rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565823 CN202840677U (en) | 2012-10-30 | 2012-10-30 | Excitation device for improving reliability of excitation system of pumped storage unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565823 CN202840677U (en) | 2012-10-30 | 2012-10-30 | Excitation device for improving reliability of excitation system of pumped storage unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840677U true CN202840677U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220565823 Expired - Lifetime CN202840677U (en) | 2012-10-30 | 2012-10-30 | Excitation device for improving reliability of excitation system of pumped storage unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202840677U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883104A (en) * | 2015-06-02 | 2015-09-02 | 国电南瑞科技股份有限公司 | Multifunctional resistance circuit with small current test and residual voltage excitation freewheeling functions |
| CN109150041A (en) * | 2018-10-10 | 2019-01-04 | 邓光辉 | A kind of novel excitation circuit and device for synchronous generator |
-
2012
- 2012-10-30 CN CN 201220565823 patent/CN202840677U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883104A (en) * | 2015-06-02 | 2015-09-02 | 国电南瑞科技股份有限公司 | Multifunctional resistance circuit with small current test and residual voltage excitation freewheeling functions |
| CN109150041A (en) * | 2018-10-10 | 2019-01-04 | 邓光辉 | A kind of novel excitation circuit and device for synchronous generator |
| CN109150041B (en) * | 2018-10-10 | 2022-05-27 | 邓光辉 | Excitation circuit and device for synchronous generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID XINYUAN CO., LTD. STATE GRID XINYUAN HO Effective date: 20130502 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: BEIJING MING TOMBS STORAGE POWER PLANT OF NCGC Effective date: 20130502 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 102200 CHANGPING, BEIJING TO: 100000 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130502 Address after: 100000 Beijing West Chang'an Avenue No. 86 Patentee after: State Grid Corporation of China Patentee after: STATE GRID XINYUAN Co.,Ltd. Patentee after: BEIJING SHISANLING ENERGY STORAGE PLANT OF STATE GRID XINYUAN CO.,LTD. Address before: 102200 Beijing city Changping District water village in Ming Dynasty Tombs of Beijing pumped storage power station Patentee before: North China Grid Co.,Ltd. Beijing Shisanling Storage Power Plant |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
|
| CX01 | Expiry of patent term |