CN100438301C - Startup power supply of chain inverter for static synchronous compensator - Google Patents
Startup power supply of chain inverter for static synchronous compensator Download PDFInfo
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- CN100438301C CN100438301C CNB2005101261847A CN200510126184A CN100438301C CN 100438301 C CN100438301 C CN 100438301C CN B2005101261847 A CNB2005101261847 A CN B2005101261847A CN 200510126184 A CN200510126184 A CN 200510126184A CN 100438301 C CN100438301 C CN 100438301C
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Abstract
The present invention provides a startup power supply of a chain inverter for a static synchronous compensator, which belongs to the technical field of electric automation equipment. The present invention comprises a set of AC constant current power supplies and N sets of H-bridge inverter startup power supplies, wherein one AC output end of the AC constant current power supplies passes through all M current transformer central windows in all the N sets of H-bridge inverter startup power supplies as a primary side winding of the M current transformers, and returns to another output end; the AC input ends of M single-phase full bridge rectifiers are respectively connected to the AC output ends of auxiliary change windings of the M current transformers; after the direct current output ends which are mutually connected in series, the positive and the negative output ends are connected to the positive pole end and the negative pole end of a dc side capacitor of an H bridge inverter which is to be started; M voltage limiting resistors are respectively connected to the AC input ends of the M single-phase full bridge rectifiers in parallel. The startup power supply of the present invention uses core penetrating current transformers to start power supply isolation, and realizes high insulation pressurization and low partial discharge. Thus, an isolation circuit has low cost.
Description
Technical field
The present invention relates to a kind of startup power supply that is used for the chain inverter of STATCOM, belong to the electric automatization apparatus field.
Background technology
STATCOM (STATCOM or DSTATCOM) is a kind of dynamical var compensator that adopts voltage source inverter to realize, having rapid dynamic response speed, the impact of starting nothing, regulate advantages such as continuous, that floor space is little, current harmonic content is little, is the developing direction of dynamic reactive compensation device.The STATCOM that adopts chain inverter (be called H bridge series inverter again, being connected in series by a plurality of H bridge inverter ac output ends forms) to realize have floor space little, need not to insert transformer, low cost and other advantages.
Summary of the invention
The objective of the invention is to propose a kind of startup power supply that is used for the chain inverter of STATCOM, change the structure of prior art, with the startup power supply device realizing using always intrinsic isolating transformer high dielectric voltage withstand and low partial discharge index, and reduce the cost of equipment.
The startup power supply of the chain inverter that is used for STATCOM that the present invention proposes has following two kinds of different structures:
First kind of structure is: comprise a cover ac current stabilized power source, N cover H bridge inverter startup power supply; Described H bridge inverter startup power supply is made up of M current transformer, a M pressure limiting resistance and M single-phase full bridge rectifier, N, M are positive integer, an ac output end in the ac current stabilized power source passes all M current transformer central authorities forms in all N cover H bridge inverter startup power supplies, as the former limit winding of M current transformer, and turn back to another output of ac current stabilized power source; The ac input end of described M single-phase full bridge rectifier is connected respectively to the secondary winding ac output end of a described M current transformer, positive output end after the dc output end of M single-phase full bridge rectifier is connected in series mutually is connected to the described dc bus capacitor positive terminal of waiting to start the H bridge inverter, and negative output terminal is connected to the described dc bus capacitor negative pole end of waiting to start the H bridge inverter; Described M pressure limiting resistance is parallel to the ac input end of described M single-phase full bridge rectifier respectively.
The difference of second kind of structure and first kind of structure only is that described M pressure limiting resistance is parallel to the dc output end of described M single-phase full bridge rectifier respectively.
The startup power supply of the chain inverter that is used for STATCOM that the present invention proposes, its advantage is, adopt the isolation of the current transformer realization startup power supply of punching, can realize high dielectric voltage withstand and low partial discharge with comparalive ease, thereby make the buffer circuit cost lower.
Description of drawings
Fig. 1 is the user mode figure of startup power supply of the present invention.
Fig. 2 is the another kind of user mode figure of startup power supply of the present invention.
Embodiment
The startup power supply of the chain inverter that is used for STATCOM that the present invention proposes has two kinds of different structures, and the user mode figure of first kind of structure wherein comprises a cover ac current stabilized power source as shown in Figure 1, N cover H bridge inverter startup power supply; Described H bridge inverter startup power supply is made up of M current transformer, a M pressure limiting resistance and M single-phase full bridge rectifier, N, M are positive integer, an ac output end in the ac current stabilized power source passes all M current transformer central authorities forms in all N cover H bridge inverter startup power supplies, as the former limit winding of M current transformer, and turn back to another output of ac current stabilized power source; The ac input end of described M single-phase full bridge rectifier is connected respectively to the secondary winding ac output end of a described M current transformer, positive output end after the dc output end of M single-phase full bridge rectifier is connected in series mutually is connected to the described dc bus capacitor positive terminal of waiting to start the H bridge inverter, and negative output terminal is connected to the described dc bus capacitor negative pole end of waiting to start the H bridge inverter; Described M pressure limiting resistance is parallel to the ac input end of described M single-phase full bridge rectifier respectively.
The user mode figure of second kind of structure only is that with the difference of first kind of structure described M pressure limiting resistance is parallel to the dc output end of described M single-phase full bridge rectifier respectively as shown in Figure 2.
Startup power supply of the present invention, wherein M current transformer in the H bridge inverter startup power supply all adopts toroidal core or iron core, and former limit adopts a circle winding to pass magnetic core or central authorities unshakable in one's determination, and former limit winding is imported the electric current of described ac current stabilized power source output; Described M current transformer secondary adopts multicircuit winding, and the alternating current that former limit is imported converts the alternating current that secondary is exported to, delivers to the ac input end of described M single-phase full bridge rectifier respectively; The former secondary winding of a described M current transformer all adopts insulated wire so that bear high voltage between the former secondary.
Below in conjunction with accompanying drawing circuit embodiments structure of the present invention and operation principle are further described.
As shown in Figure 1, the formation of a phase H bridge series inverter and the formation block diagram of startup power supply of the present invention have been the figure shows.Among Fig. 1, semiconductor power switch SLA1, SLB1, SRA1, SRB1, capacitor C 1, resistance R D1 and semiconductor power switch SD1 constitute first H bridge inverter of waiting to start H bridge series inverter, semiconductor power switch SNLA, SNLB, SNRA, SNRB, capacitor C N, resistance R DN and semiconductor power switch SDN constitute the individual H bridge inverter of N (N is a positive integer) of this H bridge series inverter.When constituting STATCOM with H bridge series inverter, the general three-phase H bridge series inverter that adopts, and the dc bus capacitor of each H bridge inverter is when static synchronous compensator device starts, need be charged to certain set point to each dc bus capacitor by external power source, the three-phase inverter output voltage is reached and line voltage frequency, same-phase and same amplitude together, and device can be incorporated into the power networks and put into operation afterwards.Be the startup power supply device for the external power source device of each dc bus capacitor charging.
Circuit among Fig. 1 in the frame of broken lines is promptly represented the formation of startup power supply device of the present invention.Among the figure, an ac current stabilized power source is arranged, and N cover H bridge inverter startup power supply.To first H bridge inverter, its startup power supply is made up of M current transformer (CT11-CT1M), a M pressure limiting resistance (R11-R1M) and M single-phase full bridge rectifier (B11-B1M).When ac current stabilized power source is exported certain alternating current, current transformer CT11-CT1M flows through this electric current in former limit, the alternating current that secondary induces will flow through pressure limiting resistance R 11-R1M and flow to wait to start through single-phase full bridge rectifier B11-B1M to be waited to start among the dc capacitor C1 of H bridge inverter, and C1 charges to dc capacitor.When the voltage of dc capacitor C1 hanged down, the electric current of the pressure limiting resistance R of flowing through 11-R1M was little, and the electric current that flows to dc capacitor C1 is big; When dc capacitor C1 voltage was more and more higher, the electric current that flows to C1 was more and more littler, and the electric current of the pressure limiting resistance R 11-R1M that flows through is increasing.When the whole electric currents of current transformer CT11-CT1M secondary are all flowed through pressure limiting resistance R 11-R1M, dc capacitor C1 goes up voltage and just has been charged to maximum, this maximum has just determined (because the current transformer primary current is constant) by pressure limiting resistance R 11-R1M, so pressure limiting resistance R 11-R1M has played the effect of deboost.The composition mode of other H bridge inverter startup power supplies is identical.After static synchronous compensator device was incorporated into the power networks, ac current stabilized power source can quit work, and also can work on, and made whole startup power supply device treat the assist control effect that starting H bridge inverter dc capacitor voltage plays balance.
Fig. 2 has provided the another kind of user mode figure of startup power supply device of the present invention, and its operation principle is identical with structure shown in Figure 1, but each current-limiting resistance R11-R1M has been parallel to the dc output end of each single-phase rectifier R11-R1M among the figure.In addition, also can be at ac input end and each current-limiting resistance in parallel of dc output end of each single-phase rectifier.
Any based on the equivalent transformation circuit that the present invention did, all belong to protection scope of the present invention.The present invention also can be used for adopting other converter devices of H bridge inverter, as active filter, or the like, these application scenarios all belong to protection scope of the present invention.
Claims (1)
1, a kind of startup power supply that is used for the chain inverter of STATCOM is characterized in that: comprise a cover ac current stabilized power source, N cover H bridge inverter startup power supply; Described H bridge inverter startup power supply is made up of M current transformer, a M pressure limiting resistance and M single-phase full bridge rectifier, N, M are positive integer, an ac output end in the ac current stabilized power source passes all M current transformer central authorities forms in all N cover H bridge inverter startup power supplies, as the former limit winding of M current transformer, and turn back to another output of ac current stabilized power source; The ac input end of described M single-phase full bridge rectifier is connected respectively to the secondary winding ac output end of a described M current transformer, positive output end after the dc output end of M single-phase full bridge rectifier is connected in series mutually is connected to the described dc bus capacitor positive terminal of waiting to start the H bridge inverter, and negative output terminal is connected to the described dc bus capacitor negative pole end of waiting to start the H bridge inverter; Described M pressure limiting resistance is parallel to the ac input end of described M single-phase full bridge rectifier respectively, or is parallel to the dc output end of described M single-phase full bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261847A CN100438301C (en) | 2005-12-01 | 2005-12-01 | Startup power supply of chain inverter for static synchronous compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261847A CN100438301C (en) | 2005-12-01 | 2005-12-01 | Startup power supply of chain inverter for static synchronous compensator |
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| Publication Number | Publication Date |
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| CN1805262A CN1805262A (en) | 2006-07-19 |
| CN100438301C true CN100438301C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101261847A Expired - Fee Related CN100438301C (en) | 2005-12-01 | 2005-12-01 | Startup power supply of chain inverter for static synchronous compensator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102891617A (en) * | 2011-07-18 | 2013-01-23 | 清华大学 | Passive voltage-equalizing control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773799A (en) * | 1996-04-01 | 1998-06-30 | Gas Research Institute | High-frequency induction heating power supply |
| US6072707A (en) * | 1998-10-23 | 2000-06-06 | Siemens Power Transmission & Distribution, Inc. | High voltage modular inverter |
| CN1461088A (en) * | 2003-06-12 | 2003-12-10 | 清华大学 | Bidirectional converter for making D.C. voltage balance control of chain static synchronous compensator |
-
2005
- 2005-12-01 CN CNB2005101261847A patent/CN100438301C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773799A (en) * | 1996-04-01 | 1998-06-30 | Gas Research Institute | High-frequency induction heating power supply |
| US6072707A (en) * | 1998-10-23 | 2000-06-06 | Siemens Power Transmission & Distribution, Inc. | High voltage modular inverter |
| CN1461088A (en) * | 2003-06-12 | 2003-12-10 | 清华大学 | Bidirectional converter for making D.C. voltage balance control of chain static synchronous compensator |
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| CN1805262A (en) | 2006-07-19 |
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Assignee: TIANJIN XIANDAO BELL ELECTRIC Co.,Ltd. Assignor: Tsinghua University Contract fulfillment period: 2009.4.1 to 2014.3.31 Contract record no.: 2009120000042 Denomination of invention: Startup power supply of chain inverter for static synchronous compensator Granted publication date: 20081126 License type: Exclusive license Record date: 20090507 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.1 TO 2014.3.31; CHANGE OF CONTRACT Name of requester: XIANDAO BELL ELECTRIC CO., LTD, TIANJIN Effective date: 20090507 |
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Effective date of registration: 20161122 Address after: 100176 Beijing City Economic and Technological Development Zone Yuncheng Street No. 2 Intelligent Building Tellhow B block 11 layer Patentee after: BEIJING ZHIZHONG ENERGY INTERNET RESEARCH INSTITUTE Co.,Ltd. Address before: 100084 Beijing City, Haidian District Tsinghua Yuan Patentee before: Tsinghua University |
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