METHOD AND APPARATUS FOR CONTROLLING VOLTAGE OF DISTRIBUTED PHOTOVOLTAIC POWER DISTRIBUTION NETWORK - STATE GRID NING BO CURRENT SUPPLY COMPANY OF ZHEJIANG ELECTRIC POWER COMPANY

Title:

METHOD AND APPARATUS FOR CONTROLLING VOLTAGE OF DISTRIBUTED PHOTOVOLTAIC POWER DISTRIBUTION NETWORK

Document Type and Number:

WIPO Patent Application WO/2018/214810

Kind Code:

A1

Abstract:

Disclosed are a method and apparatus for controlling the voltage of a distributed photovoltaic power distribution network, which use a step-by-step control strategy from bottom to top. The method involves: when a feeder voltage rises to a warning value and does not exceed an upper limit value, a local controller executing local control over a reactive power feeder voltage of a photovoltaic inverter; when reactive power in a current area is depleted and the feeder voltage still reaches the upper limit value, using a regional controller to execute coordinated control over a regional reactive power feeder voltage; and when the reactive power capacity along a line is depleted and the feeder voltage still reaches the upper limit value, a power station controller executing on-load voltage-regulating transformer control, and when a transformer tap reaches an action limit and the feeder voltage exceeds the upper limit value, executing active power reduction control over the photovoltaic inverter until the feeder voltage does not exceed the upper limit value.

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Inventors:

ZHOU KAIHE (CN)
ZHU CHENGZHI (CN)
XU XIAOZHONG (CN)
GONG XIANGYANG (CN)
WANG WEI (CN)
WANG BO (CN)
YU YINSHU (CN)
FANG YUNHUI (CN)
ZHANG FENG (CN)
HE YU (CN)

Application Number:

PCT/CN2018/087438

Publication Date:

November 29, 2018

Filing Date:

May 18, 2018

Export Citation:

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Assignee:

STATE GRID NING BO CURRENT SUPPLY COMPANY OF ZHEJIANG ELECTRIC POWER COMPANY (CN)
STATE GRID CORP CHINA (CN)

International Classes:

H02J3/16; H02J3/38; H02J3/18

Foreign References:

CN107069823A	2017-08-18
CN104201691A	2014-12-10
US20150168981A1	2015-06-18
CN103595135A	2014-02-19
CN205921387U	2017-02-01

Attorney, Agent or Firm:

BEYOND ATTORNEYS AT LAW (CN)

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