CN101075783B - Three-phase medium-frequency DC high-voltage power supply for ESP - Google Patents

Three-phase medium-frequency DC high-voltage power supply for ESP Download PDF

Info

Publication number
CN101075783B
CN101075783B CN200710069164A CN200710069164A CN101075783B CN 101075783 B CN101075783 B CN 101075783B CN 200710069164 A CN200710069164 A CN 200710069164A CN 200710069164 A CN200710069164 A CN 200710069164A CN 101075783 B CN101075783 B CN 101075783B
Authority
CN
China
Prior art keywords
circuit
phase
intermediate frequency
power supply
voltage
Prior art date
Application number
CN200710069164A
Other languages
Chinese (zh)
Other versions
CN101075783A (en
Inventor
蒋云峰
张之平
蒋庆龙
宋荣群
周承鸣
汪飞
杨希
冯国胜
Original Assignee
武汉大学
浙江佳环电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉大学, 浙江佳环电子有限公司 filed Critical 武汉大学
Priority to CN200710069164A priority Critical patent/CN101075783B/en
Publication of CN101075783A publication Critical patent/CN101075783A/en
Application granted granted Critical
Publication of CN101075783B publication Critical patent/CN101075783B/en

Links

Abstract

The invention comprises: a variable current main circuit, an interface circuit and a power intelligent control circuit. Said variable current main circuit comprises a three-phase power input control circuit, a three-phase full-wave rectification circuit, a filter circuit, a inverter circuit, a three-phase higher harmonic filter circuit, and a three-phase intermediate frequency transformer. The a three-phase power frequency AC power is inputted to the three-phase power input control circuit, and is filtered and rectified by the three-phase rectification circuit and filter circuit to get DC voltage which is sent to the inverter circuit; after high frequency inversion and filter, a intermediate frequency voltage is obtained; the intermediate frequency voltage is boosted and filtered by the intermediate rectification transformer to get a DC voltage which is inputted into the both ends of the load.

Description

ESP three-phase intermediate frequency DC high-voltage power supply

Technical field

The present invention relates to a kind of power supply, refer in particular to a kind of ESP three-phase intermediate frequency DC high-voltage power supply.

Background technology

Electrostatic precipitator (being called for short ESP) is the visual plant in the environmental protection field, is mainly used in plasma discharge, dedusting, demist, dehydration, air cleaning, high-effective dust-removing desulfurization, impurity separation and plurality of raw materials recovery etc.

The high voltage electric field equivalence of ESP is R, C shunt load, and wherein C is the equivalent capacity of high voltage electric field, is generally several thousand~several ten thousand PF, and R is a variable resistor, changes at any time with the ESP operating mode.As seen, ESP is fluctuating load, and is very big to the impact of its DC high-voltage power supply when flashover or short circuit take place, and must take corresponding measure to guarantee that power supply is reliable, stable operation for this reason.

Existing ESP mainly contains following several with power supply:

1, single-phase SCR power supply:

(1) work in power frequency 50Hz, make that volume of transformer is big, weight big, consume a large amount of copper, iron and transformer oil, along with the rise of material price, advantage is disappearing cheaply;

(2) exchanging phase shifting control, make that the grid side harmonic wave is serious, adopt the two-phase power supply, is out of balance load to electrical network;

(3) adopt the interchange phase-shift voltage regulating, make that output high pressure ripple is bigger, the average voltage of exporting to ESP is lower.

2, high frequency electric source:

Because the inherent characteristics of high frequency electric source can obviously improve the power supply performance to ESP, and then improve the dust-collecting efficiency of ESP, the exploitation of high frequency electric source becomes a hot technology.

But at present, continuous increase along with the ESP area, the capacity of high frequency electric source can not satisfy user's needs, especially needs capacity more than the 80KV/1A in electric power system, and the exploitation of high-power high-frequency power supply is subject to high-frequency loss, being difficult to has big breakthrough, present commercial heap(ed) capacity high frequency electric source is 70KV/1A, in addition, because control cubicle and transformer are inseparable, control cubicle is in outdoor operation, and useful life is shorter.

3, intermediate frequency power supply:

Intermediate frequency power supply has SCR power supply low-loss, high-power concurrently, the characteristics of high frequency electric source small size, high power supply performance, and technical conditions maturation, can form products with larger capacity in a short time, substitute big capacity SCR power supply, high capacity as early as possible, large-scale production, the first chance that dominates the market, and have cost advantage.

Relative the above-mentioned type power supply, the transformer of intermediate frequency power supply is than SCR power transformer volume little (1/ (2~3) that are about the SCR power transformer); Power supply performance and high frequency electric source are suitable, are easy to big capacity; Adopt lower reverse frequency, the IGBT loss is less, transformer adopting 400Hz intermediate frequency, and loss higher-frequency power supply is little; Control cubicle can separate with transformer, and control cubicle can be placed indoor, and service conditions is better, and reliability is higher, and the life-span is longer, is convenient to safeguard and maintenance; Intermediate frequency power supply higher-frequency power technology continuity is good, and 80KV/2A and 80KV/1A technical scheme can be constant, are convenient to shorten the construction cycle, form scale rapidly.

Shortcoming is that equal capacity intermediate frequency transformer volume higher-frequency power supply is big, but core material and the requirement of line bag are lower than high frequency electric source.

Summary of the invention

The invention provides a kind of power supply balance, volume and weight is little, the ESP of high power supply performance three-phase intermediate frequency DC high-voltage power supply.

A kind of ESP three-phase intermediate frequency DC high-voltage power supply, comprise unsteady flow main circuit, interface circuit and power supply smart control circuit, described unsteady flow main circuit adopts and exchanges (AC) → direct current (DC) → interchange (AC) → direct current (DC) unsteady flow working method, is connected and composed successively by three phase mains input control circuit, three-phase full wave rectifier circuit, filter circuit, inverter circuit, three-phase high-order harmonic filtering circuit, three-phase intermediate frequency rectifier transformer.The three phase mains input control circuit is introduced the three-phase main-frequency AC power, obtain direct voltage through three-phase full wave rectifier circuit and filter circuit rectifying and wave-filtering, deliver to inverter circuit, after high-frequency inversion, filtering, obtain three-phase midfrequent AC voltage, again through three-phase intermediate frequency rectifier transformer boost, rectification obtains direct voltage, inserts the load two ends.

Described three phase mains input control circuit is made up of several air switches or circuit breaker, several contactors and control circuit.

Described three phase mains input control circuit has soft start function.

Described three-phase full wave rectifier circuit is made up of a three phase full wave rectification module or three doube bridge arm rectification modules or six rectifier diodes, is used for the full-wave rectification of three-phase main-frequency AC power is become Rectified alternating current.

Described filter circuit is made up of direct current reactor and filter capacitor, and the Rectified alternating current that three-phase full wave rectifier circuit is exported is filtered into direct voltage more stably.

But described inverter circuit is made of several cut-off devices, it is 4.8kHz or 7.2kHz that the direct voltage that is used for importing is reverse into carrier wave fs, modulating wave fr is the three-phase PWM pulse of 400Hz, but the control end of each cut-off device links to each other with the output of corresponding module drive circuit, and the module drive circuit input end inserts the power supply smart control circuit.

But described cut-off device adopts gated transistor, static induction transistor, turn-off thyristor or huge transistor.

Described three-phase high-order harmonic filtering circuit is made up of the electric capacity that three inductance that link to each other respectively at the inverter circuit output and three Δs connect, its output inserts three-phase intermediate frequency rectifier transformer, the carrier wave fs that is used for inverter circuit output is 4.8kHz or 7.2kHz, and modulating wave fr is that to become frequency be the three-phase medium frequency alternating current of 400Hz in the three-phase PWM pulse bandwidth filtering of 400Hz.

Described three-phase intermediate frequency rectifier transformer is made up of three-phase intermediate frequency reactor, three-phase intermediate frequency step-up transformer, three-phase intermediate frequency rectifier and secondary voltage current sampling circuit, the output access interface circuit of secondary voltage current sampling circuit is used for the three-phase medium frequency alternating current is rectified into dc high-voltage through boosting.

Be connected to the dc bus sample circuit on the described inverter circuit, comprise voltage sample circuit and current sampling circuit, its input is connected with the dc bus of inverter circuit, and output access interface circuit is used to detect the voltage and current signal of inverter circuit dc bus.

Have access to the primary voltage current sampling circuit between described three-phase high-order harmonic filtering circuit and the three-phase intermediate frequency rectifier transformer, comprise at least one current transformer and a voltage transformer, its output access interface circuit.

Described interface circuit is by switching value signal output driving circuit, switching value input signal conditioning circuit, and once with compositions such as secondary current voltage sampling signal modulate circuits, the one end links to each other with main circuit, and the other end links to each other with the power supply smart control circuit.

Described power supply smart control circuit comprises the hardware configuration be made up of control circuit, display circuit and keyboard and control, software for display.

Power supply provided by the invention adopts the unsteady flow working method that exchanges (AC) → direct current (DC) → interchange (AC) → direct current (DC); The rectification of boosting of three-phase high-frequency inversion, intermediate frequency 400Hz can effectively improve power work efficient, the volume that reduces power supply, weight, reduces output ripple; Can produce the various waveforms that are suitable for the different operating modes of ESP, the ESP dust removing effects is had greatly improved; Power supply conversion efficiency height (>92%), three phase supply balance and power factor height (>0.9), little to the Harmonic Interference of electrical network; Custom-designed monitoring software interface is arranged, and easy to operate, user interface close friend can realize unmanned, few man on duty; Adopt independent operating, the advanced control model of centralized monitor; Have perfect defencive function, safe and reliable; It is the power supply that integrates modern power electronics technology, Computer Control Technology (DSP technology), network control technology.

Description of drawings

Fig. 1 is an electrical block diagram of the present invention.

Embodiment

As shown in Figure 1, a kind of ESP comprises unsteady flow main circuit, interface circuit and power supply smart control circuit with three-phase intermediate frequency DC high-voltage power supply.

The unsteady flow main circuit is connected and composed successively by three phase mains input control circuit 1, three-phase full wave rectifier circuit 2, filter circuit 3, dc bus sample circuit 4, inverter circuit 5, three-phase high-order harmonic filtering circuit 6, primary voltage current sampling circuit 7, three-phase intermediate frequency rectifier transformer 8 and load circuit 9.

Three phase mains input control circuit 1 is made up of several air switches (or circuit breaker), contactor (containing vacuum contactor) and control circuit, its input termination three-phase main-frequency AC power, power to the unsteady flow main circuit, three-phase main-frequency alternating current A, B, C control are delivered to three-phase full wave rectifier circuit 2, and contained soft start function.

Three-phase full wave rectifier circuit 2 is made up of a three phase full wave rectification module or three doube bridge arm rectification modules or six rectifier diodes, is used for the full-wave rectification of three-phase main-frequency AC power is become Rectified alternating current.

Filter circuit 3 is made up of direct current reactor and filter capacitor, and the Rectified alternating current that three-phase full wave rectifier circuit is exported is filtered into direct voltage more stably.

But inverter circuit 5 is made of several cut-off devices, it is 4.8kHz or 7.2kHz that the direct voltage that is used for importing is reverse into carrier wave fs, modulating wave fr is the three-phase PWM pulse of 400Hz, but the control end of each cut-off device links to each other with the output of corresponding module drive circuit 10, and module drive circuit 10 inputs insert power supply smart control circuit 12.But cut-off device adopts gated transistor, static induction transistor, turn-off thyristor or huge transistor.

Be connected to dc bus sample circuit 4 on the inverter circuit 5, comprise voltage sample circuit and current sampling circuit, its input is connected with the dc bus of inverter circuit 5, and output access interface circuit 11 is used to detect the voltage and current signal of inverter circuit 5 dc buss.

Three-phase high-order harmonic filtering circuit 6 is made up of the electric capacity that three inductance that link to each other respectively at inverter circuit 5 outputs and three Δs connect, its output inserts three-phase intermediate frequency rectifier transformer 8, the carrier wave fs that is used for inverter circuit 5 output is 4.8kHz or 7.2kHz, and modulating wave fr is that to become frequency be the three-phase medium frequency alternating current of 400Hz in the three-phase PWM pulse bandwidth filtering of 400Hz.

Primary voltage current sampling circuit 7 comprises at least one current transformer and a voltage transformer, its output access interface circuit 11.

Three-phase intermediate frequency rectifier transformer 8 is made up of three-phase intermediate frequency reactor, three-phase intermediate frequency step-up transformer, three-phase intermediate frequency full-wave rectifier and secondary voltage current sampling circuit, the output access interface circuit 11 of secondary voltage current sampling circuit is used for the three-phase medium frequency alternating current is rectified into dc high-voltage through boosting.

The core material of three-phase intermediate frequency rectifier transformer 8 can adopt silicon steel or the crystallite of 0.21mm; Line packaging material material adopts common lacquer line; The transformer triple line holds group and adopts Δ/Y structure; The three phase rectifier rectifier bridge adopts common or intermediate frequency silicon stack; The transformer heat radiation can be adopted the oil cooling radiation fin.

SVPWM (space vector PWM) inversion transformation technique is adopted in unsteady flow control of the present invention, can reduce switching loss, improves the direct current utilance.Its unsteady flow control principle is the adjusting that realizes output voltage by space vector PWM (SVPWM), be specially: in by-pass cock period T s (fs=12*400Hz=4.8kHz), the amplitude that the size of insertion voltage vector T1 action time, T2 is regulated the 400Hz sine wave, and then regulate output voltage; By modulating frequency fr, decision sine wave phase θ=2 π * fr*t.

Three-phase main-frequency AC power AC380V obtains 510V left and right sides direct voltage through three phase mains input control circuit 1, three-phase full wave rectifier circuit 2 and filter circuit 3 rectifying and wave-filterings, deliver to IGBT inverter circuit 5, producing carrier wave fs through IGBT inverter circuit 5 is 4.8kHz or 7.2kHz, modulating wave fr is the three-phase PWM pulse of 400Hz, produce the 400Hz sinusoidal voltage through three-phase high-order harmonic filtering circuit 6, deliver to three-phase intermediate frequency rectifier transformer 8, through three-phase intermediate frequency rectifier transformer 8 boost, rectification obtains the 80kV direct voltage, the 80KV direct voltage gives load ESP circuit 9 power supplies.

It is three phase rectifier, three-phase IGBT high-frequency inversion and high frequency LC filtering that the unsteady flow main circuit adopts the unsteady flow working method of AC → DC → AC → DC, and intermediate frequency 400Hz boosts, rectification; Have three phase supply balance and power factor height (>0.9), little to the Harmonic Interference of electrical network; Can effectively improve power work efficient, reduce volume, the weight of power supply, reduce the advantage of output ripple, have the low-loss of SCR power supply, high-power and high frequency electric source small size, high performance advantage concurrently, and technical conditions maturation, be easy to produce in enormous quantities, and have cost advantage, can substitute big capacity SCR power supply within a short period of time.

Interface circuit 11 is by switching value signal output driving circuit, switching value input signal conditioning circuit, and once with compositions such as secondary current voltage sampling signal modulate circuits, the one end links to each other with main circuit, and the other end links to each other with the power supply smart control circuit.

Power supply smart control circuit 12 comprises the hardware configuration be made up of control circuit, display circuit and keyboard and control, software for display.

Control circuit adopts three-phase intermediate frequency (400Hz) amplitude modulation pressure regulation, realize the adjusting of output voltage, and flashover processing response speed is fast, realizes the best power supply to ESP.

PI (proportional integral) control algolithm is adopted in voltage stabilizing/constant current control, realizes floating voltage stabilizing/constant current control.

The digital signal processor DSP s (TMS320F2812) of TI company is adopted in operation control, can realize the Optimal Control of power-supply system.

ARM or PC are adopted in monitoring, by the communication of RS485/CAN communication network, realize the collecting and distributing type Long-distance Control.

Claims (10)

1. an ESP is with three-phase intermediate frequency DC high-voltage power supply, comprise the unsteady flow main circuit, interface circuit (11) and power supply smart control circuit (12), it is characterized in that: described unsteady flow main circuit adopts the unsteady flow working method of interchange → direct current → interchange → direct current, by three phase mains input control circuit (1), three-phase full wave rectifier circuit (2), filter circuit (3), inverter circuit (5), three-phase high-order harmonic filtering circuit (6), three-phase intermediate frequency rectifier transformer (8) connects and composes successively, three phase mains input control circuit (1) is introduced the three-phase main-frequency AC power, obtain direct voltage through three-phase full wave rectifier circuit (2) and filter circuit (2) rectifying and wave-filtering, deliver to inverter circuit (5), through high-frequency inversion, obtain three-phase midfrequent AC voltage after the filtering, boost through three-phase intermediate frequency rectifier transformer (8) again, rectification obtains direct voltage, inserts load (9) two ends.
2. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: described three phase mains input control circuit (1) is made up of several air switches or circuit breaker, several contactors and control circuit.
3. ESP as claimed in claim 1 is characterized in that with three-phase intermediate frequency DC high-voltage power supply: described three-phase full wave rectifier circuit (2) is made up of a three phase full wave rectification module or three doube bridge arm rectification modules or six rectifier diodes.
4. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: described filter circuit (3) is made up of direct current reactor and filter capacitor, to the pulsating dc voltage filtering of three-phase full wave rectifier circuit (2) output.
5. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: described inverter circuit (5) but constitute by several cut-off devices, but the control end of each cut-off device links to each other with the output of corresponding module drive circuit (10), and module drive circuit (10) input inserts power supply smart control circuit (12).
6. ESP as claimed in claim 5 three-phase intermediate frequency DC high-voltage power supply is characterized in that: but described cut-off device adopts gated transistor, static induction transistor, turn-off thyristor or huge transistor.
7. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: described three-phase high-order harmonic filtering circuit (6) is formed its output access three-phase intermediate frequency rectifier transformer (8) by the electric capacity that three inductance that link to each other with inverter circuit (5) output respectively and three Δs are connected.
8. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: described three-phase intermediate frequency rectifier transformer (8) is made up of three-phase intermediate frequency reactor, three-phase intermediate frequency step-up transformer, three-phase intermediate frequency rectifier and secondary voltage current sampling circuit, the output access interface circuit (11) of secondary voltage current sampling circuit.
9. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: be connected to dc bus sample circuit (4) on the described inverter circuit (5), comprise voltage sample circuit and current sampling circuit, its input is connected with the dc bus of inverter circuit (5), output access interface circuit (11).
10. ESP as claimed in claim 1 three-phase intermediate frequency DC high-voltage power supply, it is characterized in that: have access to primary voltage current sampling circuit (7) between described three-phase high-order harmonic filtering circuit (6) and the three-phase intermediate frequency rectifier transformer (8), comprise at least one current transformer and a voltage transformer, its output access interface circuit (11).
CN200710069164A 2007-06-01 2007-06-01 Three-phase medium-frequency DC high-voltage power supply for ESP CN101075783B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200710069164A CN101075783B (en) 2007-06-01 2007-06-01 Three-phase medium-frequency DC high-voltage power supply for ESP

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200710069164A CN101075783B (en) 2007-06-01 2007-06-01 Three-phase medium-frequency DC high-voltage power supply for ESP

Publications (2)

Publication Number Publication Date
CN101075783A CN101075783A (en) 2007-11-21
CN101075783B true CN101075783B (en) 2010-05-26

Family

ID=38976639

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200710069164A CN101075783B (en) 2007-06-01 2007-06-01 Three-phase medium-frequency DC high-voltage power supply for ESP

Country Status (1)

Country Link
CN (1) CN101075783B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2398124T3 (en) 2010-06-18 2018-09-03 General Electric Technology Gmbh Method of minimizing harmonics in input current to power systems such as ESP power systems
CN102158094B (en) * 2011-05-17 2013-06-12 河北工业大学 Photovoltaic power generation DC-DC (Direct Current-Direct Current) converter and control method thereof
CN102843058B (en) * 2012-09-24 2015-07-15 核工业理化工程研究院 All-digital three-phase medium frequency inverter based on DSP (Digital Signal Processor)
CN104252143A (en) * 2013-06-27 2014-12-31 李木 Liquid drop or liquid flow sorting control system and control method thereof
CN103397304B (en) * 2013-08-21 2015-05-27 南京浩穰环保科技有限公司 Micro-arc ion plating method
CN104065282A (en) * 2014-07-15 2014-09-24 鞍山市权晟电子电力有限公司 Three-phase high-frequency inversion high-voltage rectification electrostatic dust collection integrated power supply
CN104578819B (en) * 2014-12-19 2017-05-10 中国石油天然气集团公司 Underwater exploration intermediate-frequency deck power source and electromagnetic exploration system
CN105743413A (en) * 2016-03-24 2016-07-06 苏州合欣美电子科技有限公司 Rectifier three-phase power supply-based variable-frequency governor
CN105958494A (en) * 2016-04-29 2016-09-21 株洲中车时代电气股份有限公司 Train power supply system comprising dual-output power system
CN105790615A (en) * 2016-04-29 2016-07-20 株洲中车时代电气股份有限公司 Power supply main circuit of electric locomotive

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1369348A (en) * 2001-02-16 2002-09-18 唐玉贵 Intelligent multifunctional inverse-conversion power supply for cutting/welding
JP2003088132A (en) * 2001-09-10 2003-03-20 Origin Electric Co Ltd Power supply for electrical dust collection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1369348A (en) * 2001-02-16 2002-09-18 唐玉贵 Intelligent multifunctional inverse-conversion power supply for cutting/welding
JP2003088132A (en) * 2001-09-10 2003-03-20 Origin Electric Co Ltd Power supply for electrical dust collection

Also Published As

Publication number Publication date
CN101075783A (en) 2007-11-21

Similar Documents

Publication Publication Date Title
CN105164907B (en) D.C. high voltage transmission converter
CN100544178C (en) Multi-phase current supplying circuit and drive unit
CN101954313B (en) High-frequency high-voltage switching power supply for electric precipitation
CN103683356B (en) On-Line UPS topology
US9397580B1 (en) Dual link power converter
CN102222937B (en) Photovoltaic grid-connected inverter and grid-connected control method thereof
JP3422218B2 (en) Converter
CN201035433Y (en) Energy bidirectional flowing voltage regulator
CN102545648B (en) Multi-phase current supplying circuit, driving apparatus, compressor, and air conditioner
CN201726182U (en) High voltage ultracapacitor power battery charger
CN103394412B (en) A kind of electric precipitation high-frequency impulse power power-supply
CN105235536B (en) A kind of motor train unit traction system and energy control method
EP1687892A2 (en) Multifunction hybrid intelligent universal transformer
CN102709994A (en) Charge-discharge two-way power converter for battery for electric car
CN1808832B (en) Circuit apparatus applicable to middle and high power UPS
CN102714465A (en) Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance
CN103001573A (en) Medium-voltage frequency-conversion driving system
CN102157940B (en) Device for eliminating voltage harmonics of power system
CN201404859Y (en) Electric precipitation high frequency pulse feed high-voltage rectification power supply
CN102044961A (en) Circuit for eliminating noise of switching power supply
CN102891613A (en) Alternating current (AC) to direct current (DC) power converter and DC charging station
CN101123401A (en) Cutting control AC voltage adjusting circuit and its application
CN103647321B (en) The multifunctional vehicle mounted charging circuit of electric automobile
CN202353232U (en) High-voltage cascaded inverter power unit grid-connection feedback device
CN2556848Y (en) High-frequency inverter for electric removing dust

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant